Haozhe Yu
Qicong Wang3
Yun Feng- 1Department of Ophthalmology, Peking University Third Hospital, Beijing, China
- 2Institute of Medical Technology, Peking University Health Science Center, Beijing, China
- 3Department of Chinese Medicine of Taiwan, Hong Kong and Macao, Beijing University of Chinese Medicine, Beijing, China
Melatonin plays a critical role in the pathophysiological process including circadian rhythm, apoptosis, and oxidative stress. It can be synthesized in ocular tissues, and its receptors are also found in the eye, triggering more investigations concentrated on the role of melatonin in the eye. In the past decades, the protective and therapeutic potentials of melatonin for ocular diseases have been widely revealed in animal models. Herein, we construct a knowledge map of melatonin in treating ocular diseases through bibliometric analysis and review its current understanding and clinical evidence. The overall field could be divided into twelve topics through keywords co-occurrence analysis, in which the glaucoma, myopia, and retinal diseases were of greatest research interests according to the keywords burst detection. The existing clinical trials of melatonin in ocular diseases mainly focused on the glaucoma, and more research should be promoted, especially for various diseases and drug administration. We also discuss its bioavailability and further research topics including developing melatonin sensors for personalized medication, acting as stem cell therapy assistant drug, and consuming food-derived melatonin for facilitating its clinical transformation.
Introduction
Melatonin is a pleiotropic hormone synthesized from serotonin, which is mainly secreted by the pineal gland controlled by the hypothalamic suprachiasmatic nucleus (SCN) (Gillette and McArthur, 1995). The secretion of melatonin presents the character of increasing at night and decreasing during the day, indicating its role in regulating circadian rhythms (Fedele et al., 2018). Besides, the melatonin also demonstrates superior properties in antioxidant, immunomodulation, and neuroprotection (Mayo and Sainz, 2020; Moradkhani et al., 2020; Ramos et al., 2020). The function realization of melatonin depends on the receptor-independent or -mediated processes, and MT1 and MT2 are the main receptors, both of which belong to G-protein–coupled receptors and are widely distributed in various tissues (Singh et al., 2017; Legros et al., 2020). MT3 is the low-affinity receptor for melatonin, which is considered an enzyme with different characteristics, compared with MT1 and MT2 including kinetics in the ligand association/dissociation and pharmacological profile (Paul et al., 1999; Nosjean et al., 2001).
Given that the photoreceptive retinal ganglion cell is the important zeitgeber of the SCN and the circadian rhythms can be influenced under suffering ocular diseases, the relationship between melatonin and eye has attracted much attention (Turner et al., 2010; Andrews et al., 2019). Several studies have reported that the melatonin could be produced in various ocular tissues following the circadian rhythms including the lachrymal gland, retina, crystalline lens, iris, and ciliary body (Mhatre et al., 1988; Faillace et al., 1995; Alkozi et al., 2017b; Alkozi et al., 2017c). The melatonin receptors were also widely detected in the eye, such as sclera, cornea, choroid, and retina (Savaskan et al., 2002; Wiechmann and Rada, 2003; Summers Rada and Wiechmann, 2006). Much research revealed the correlation between melatonin with various ocular conditions, especially for glaucoma, inflammatory, and age-related diseases, as well as explored the therapy methods based on melatonin (Aranda et al., 2017; Crooke et al., 2017; Alkozi et al., 2020). This perspective will incorporate the existing studies based on the knowledge map and clinical trials of melatonin in ocular diseases, which aims to provide novel insights into promoting the melatonin from the bench to bedside from the point of view of enhancing the bioavailability and future research direction based on pharmacological issues.
Melatonin in Ocular Diseases
A knowledge map based on bibliometric analysis can present the overall research topics and trends compared with the topical review, which provides an in-depth insight into its frontiers and hotspots in this field (Deng et al., 2020; Valera-Gran et al., 2020). However, the role of melatonin in ocular diseases has not yet been analyzed through this method as far as we know. Therefore, its knowledge map was constructed in this research through keyword co-occurrences, and the keyword burst was also conducted to explore its trends. As shown in Figure 1, all the studies of melatonin in ocular diseases could be divided into twelve different clusters, and their connections and average year appeared were reflected by the thickness (closely in thick) and color (newly in yellow) of lines, respectively. #0 melanopsin is an opsin located in the retina and crystalline lens epithelial cells, which plays an important role in visual functions like detection and color, and non-visual functions like regulating pupil size and melatonin secretion (Hannibal et al., 2017; Prayag et al., 2019b; Spitschan, 2019). The melanopsin is sensitive to 480 nm blue light and leads to the low expression of the melatonin synthesis enzyme AANAT, which can be used to understand the mechanism of sleep disturbances and depression in patients with cataracts and retinal diseases (Feigl and Zele, 2014; Shenshen et al., 2016; Alkozi et al., 2017c; Münch et al., 2017). The influences of melanopsin in ocular diseases have been proven, and several research studies developed novel therapy methods in regulating the melatonin content in the eye including wearing yellow filter for controlling intraocular pressure (IOP) (Lledó et al., 2019; Zheng et al., 2020). #1 Dopamine and melatonin together organize the retinal circadian rhythmicity through dopamine D-4 and MT1 receptors, respectively; however, the former is mainly synthesized during the day indicating the different phase relationship with melatonin (Adachi et al., 1998; Bartell et al., 2007; Kunst et al., 2015; Goel and Mangel, 2021). They take opposing roles in regulating physiological functions of the eye, and the dopamine can reduce the expression of AANAT, resulting in the limitation of melatonin synthesis (Zawilska et al., 2004; Lorenc-Duda et al., 2009; Lavoie et al., 2010; Lavoie et al., 2013). It has been reported that the dopamine D-3 receptor could form heteromers with the MT1 or MT2 receptor and presented a negative correlation with intraocular hypertension, which might impact the occurrence of glaucoma (Reyes-Resina et al., 2020). Besides, the dopamine has been well-studied in myopia; however, its potential relevance with melatonin needs to be further explored (Wang et al., 2021c; Landis et al., 2021). #5 autoradiography, #8 serotonin N-acetyltransferases, #9 ganglion cell, #10 photoreceptor guanylyl cyclase, and #11 catecholamines represent the fundamental research of melatonin including its receptor distribution, synthesis, responses to light, regulation, and photoreceptor degeneration (Falcon et al., 1991; Mazurais et al., 1999; Benyassi et al., 2000; Sato et al., 2018; Prayag et al., 2019a). Such topics are not directly connected to the ocular diseases; therefore, they are in the marginal positions of the knowledge map.
FIGURE 1. Knowledge map of melatonin treating ocular diseases based on keywords co-occurrence and keywords burst detection.
The #2 intraocular pressure, #3 retina, #4 myopia, #6 pathogenesis, and #7 inflammation reflect the main research topics of melatonin in ocular diseases. Combining with keywords burst detection, it can be seen that the myopia, glaucoma, and retinal diseases, especially age-related diseases, are the most concerned diseases in the clinical practice, while sleep is the major intervention. Several research studies have reviewed the influence of melatonin on IOP and glaucoma, especially emphasizing the role of circadian rhythms (Alkozi et al., 2020; Ciulla et al., 2020; Martinez-Aguila et al., 2021). Exogenous application of melatonin or its analog performs well for controlling IOP in both animal models and clinical trials, and its neuroprotective effect can further prevent retinal injury under intraocular hypertension (Carracedo-Rodríguez et al., 2020; Gubin et al., 2021). Melatonin can act as antioxidant, anti-inflammatory, and immunomodulation agents besides neuroprotection, which demonstrated superior therapy effect in retinal diseases, such as age-related macular degeneration (AMD) and diabetic retinopathy (DR), and immunologic ocular diseases like uveitis (Sande et al., 2014; Chesnokova et al., 2016; Diéguez et al., 2020; Ferreira de Melo et al., 2020). Furthermore, melatonin also regulates the secretion of vascular endothelial growth factor (VEGF) in the retina, and it promotes physiological secretion for protecting the retina from oxidative stress, while reduces pathological secretion for inhibiting neovascularization (Klettner et al., 2021). It has been reported that the refractive error, optical axial length, and power demonstrated diurnal variation, and the myopes presented higher melatonin concentrations in serum and salivary, while lower in urine than non-myopes (Campbell et al., 2012; Kearney et al., 2017; Flanagan et al., 2020; Chakraborty et al., 2021). Compared with emmetropes, the myopes generally have much evening-type diurnal preference with approximately 1 h phase-delay but no significant difference in outdoor light exposure, and such properties are expected to further understand the mechanism and effect of outdoor time and light environments in myopia control (Burfield et al., 2019; Wang et al., 2021b). Moreover, melatonin has been also widely used to reveal the pathogenesis and provide possible therapy methods for many other ocular diseases, including cataract based on the oxidative stress (Kiliç et al., 2008; Ohanness et al., 2009). Nonetheless, the exact role of melatonin in ocular diseases needs to be further explored, especially for the relationship between its biological activity and circadian rhythm regulation. Certain research proposed the secretion and signaling of melatonin were under control of the circadian rhythm, which could further influence its pleiotropy (Tosini and Menaker, 1996; Hardeland, 2019). However, it has been proven that the melatonin in myopia seemed independent of the circadian rhythm, and the research about how the circadian rhythm impacted the molecular mechanism of ocular disease occurrence is still lacking (Leidl et al., 2014; Flanagan et al., 2020). There is also a lack of research on further integrating mechanisms of melatonin therapy considering several protective effects, including DNA damage, cell apoptosis, and mitochondrial dysfunction (Doğanlar et al., 2019; Mehrzadi et al., 2020). Furthermore, the causality between melatonin and ocular diseases is still unknown, despite many studies reporting the various melatonin concentrations between patients and control groups; therefore, it needs more prospective clinical studies. Similarly, the clinical trials of melatonin in treating ocular diseases are still insufficient, resulting in the huge obstacles in its transformation. Table 1 lists its representative clinical trials in publications, which can be seen mostly focused on the glaucoma and sleep disorders, while it is rare for other ocular diseases.
TABLE 1. Representative clinical trials of melatonin treating ocular diseases.
Enhancing the Bioavailability
The existing clinical trials about using melatonin to treat ocular diseases are mainly based on oral administration; however, the recent systematic reviews present that its bioavailability was only approximately 15% with significant individual difference owing to the first-pass metabolism in the liver (Harpsøe et al., 2015). The dosage forms of melatonin are also discussed, and the continuous release and absorption dosage forms demonstrate superior efficacy versus immediate release dosage forms. The latter with properties of short half-life and ultrahigh maximal plasma concentrations may further result in low bioavailability due to the deficient absorption and high risk of tolerability issues (Seiden and Shah, 2019). In the current treatment of ophthalmic diseases, the ocular surface is the most common drug delivery route, and the eye drops have been widely used for delivering melatonin in animal experiments; however, their bioavailability should be further examined owing to the ocular barriers (Dal Monte et al., 2020). For bypassing the barriers, the efficacy of intravitreal injection is also examined, especially in treating retinal diseases; however, the previous study reported that the high-dose melatonin injection resulted in degeneration of retinal cells (Yilmaz et al., 2004; Sande et al., 2014; Tao et al., 2020). Therefore, the potential toxicity of melatonin must be further scrutinized for both the ocular surface and retina, and the proper dosages for treatment must be determined, which may be different in various ocular diseases and individuals. Moreover, the appropriate administration time window of melatonin and the therapeutic effect of other administration routes, including subconjunctival injection, should also be further examined based on the large-scale clinical trials.
Novel nanotechnologies provide a promising delivery strategy with high efficiency in penetration into the ocular surface and sustained release, and the nanocarriers for ocular drug delivery are generally divided into four categories according to the geometric structure: 0D-like (D, dimension) nanoparticles, 1D-like nanofibers, 2D-like nanofilms, and 3D-like nanogels (Yu et al., 2020). The melatonin encapsulated by 0D and 1D nanocarriers has been proven to further improve the bioavailability and therapeutic prognosis of ocular diseases (Quinteros et al., 2014; Ahn et al., 2017). Musumeci et al. (2013) found the PLGA-PEG nanoparticles loaded with melatonin synthesized through the solvent displacement method held twice as long as melatonin aqueous solution (8 h vs. 4 h) in decreasing intraocular pressure with good tolerability. Cationic and mucoadhesive carriers are the most common melatonin delivery systems for enhancing the ability of permeation across the ocular surface barriers and prolonging their retention time (Hafner et al., 2015; Carbone et al., 2016). Bessone et al. (2020) reported that the melatonin coated by ethylcellulose nanoparticles showed greater penetration into the cornea with slow releasing speed compared with melatonin solution owing to the mucoadhesive effect with mucin, which significantly increased the retinal thickness and reduced approximately 16% apoptosis of retinal ganglion cells in the RD model, indicating the better retinal protective effect. However, the advanced high-dimensional nanocarriers with the characteristics of high drug-loading capacity and stimuli-responsive capacity used in loading melatonin for ocular drug delivery are still rare, which should be further developed and explored. Recently, co-delivery strategies of melatonin have also been proposed based on the synergy effect on therapies, including with glial cell line–derived neurotrophic factor and neuroprotective agents, which demonstrate better prognosis compared with the single drug. The encapsulation of melatonin in multidrug system further enhances the sustained release of formulation; however, the potential adverse effect on pharmacology caused by drug-loading site competition and pharmaceutical cocrystal formation should be considered (García-Caballero et al., 2018; Arranz-Romera et al., 2019). Moreover, the mass production of melatonin nanodrugs is still challenging, and the clinical trials are still lacking.
Toward the Future
The effect of melatonin in controlling myopia and treating cataract, glaucoma, uveitis and retinal diseases based on the circadian rhythm and its biological activity has been widely discussed, while for ocular surface, the data are insufficient (Crooke et al., 2017; Alkozi et al., 2020). Limited research reported the melatonin could promote the corneal wound healing, improve oxidative stress injuries in the dry eye, and decrease endoplasmic reticulum stress in granular corneal dystrophy type 2 (Choi et al., 2017; Crespo-Moral et al., 2018; Wang et al., 2021a). As the ocular surface might directly get exposed to the eye drops with melatonin, it is necessary for further understanding their potential interactions and influences. Besides, Gil et al. (2019) reported the melatonin and its analogs could promote the tear secretion in terms of volume, indicating that the melatonin could also impact the tear secretion; however, they did not notice the changes of the tear component. Tears are generally rich in proteins and biomarkers, which are helpful in revealing the mechanism in pathogenesis and treatment of diseases; therefore, the tear variations should be further focused before and after treating with melatonin (Chesnokova et al., 2016; Zou et al., 2020). Furthermore, melatonin also demonstrates potential biomarkers for ocular diseases. Many studies have proven that the concentration changes in melatonin could be detected in tears, saliva, or other body fluids during occurrence and development process of certain ocular diseases (Alkozi H. et al., 2017; Kearney et al., 2017; Pontelli et al., 2019). The sensors for melatonin content have also been developed for determination in biological fluids under ultratrace and real conditions (Camargo et al., 2020; Duan et al., 2020; Kumar and Goyal, 2020; Castaldo et al., 2021). Combining such parameter with other physical signs provides favorable application prospects in differential diagnosis and monitoring of ocular conditions, like dry eye, which is difficult to diagnose accurately in clinical work. Therefore, the correlation between melatonin concentration, especially in tears, and different ocular diseases and their stages in large samples based on sensors should be further explored, which might also provide a reference in personalized medication and understanding the role of melatonin in the eye (Teymourian et al., 2020).
Nowadays, stem cells have been widely used in the ocular disease therapy with well-achieved (Salih et al., 2020; Lin et al., 2021). Reprograming endogenous neural stem cells (NSCs) for promoting neuronal regeneration is considered the most promising way to treat retinal diseases and recover visual acuity (Madelaine and Mourrain, 2017). Melatonin has been proven to facilitate this process. Bai et al. (2016) found 10 μm melatonin could enhance the viability and promote proliferation and reprograming of bovine retinal–derived NSCs in vitro through inhibiting the p53-p21–mediated apoptotic pathway and regulating DNA methylation. The proliferation of NSC–induced pluripotent stem cells could also be stimulated through the activation of the ERK 1/2 signaling pathway under melatonin. Similarly, Gao et al. (2019) reported the retinal neural stem cell proliferation and its marker, nestin, increased significantly after using melatonin through melatonin receptor one-mediated in ERK and TGF-β/Smad pathways. However, the role of melatonin in regulating other ocular stem cells, such as corneal epithelial stem cells, and the assessment of their effect in treating ocular diseases in animal models are still unknown. Furthermore, melatonin also exhibits regulating ability for exogenous stem cells such as mesenchymal stem cells (MSCs) in viability, proliferation, differentiation, paracrine, and apoptosis through certain signaling pathways like Wnt and MAPK and acts as antioxidant agents to reduce the oxidative stress–induced apoptosis and enhance activity of stem cells (Ping et al., 2017; Chatterji et al., 2018; Lee et al., 2018; Majidinia et al., 2018; Fan et al., 2020; Giannaccare et al., 2020). Such properties of melatonin have been successfully applied in various disease therapies, including chronic kidney diseases, neurodegenerative diseases, and orthopedic disorders, through pretreatment or combining with scaffold, while its application is rare for ocular diseases (Ramezani et al., 2020; Yan et al., 2020; Yoon et al., 2020). Given the superiority and large potential of melatonin in regulating stem cell therapy in ophthalmology, further exploration of its treating methods, effects, and mechanisms should be emphasized, and the preliminary small-scale clinical trials can also be considered, for example, in limbal stem cell deficiency patients.
The concept of “food is medicine” has been considered an important measure in prevention, management, and treatment of chronic diseases, which was proven by several epidemiological studies and case reports (Downer et al., 2020; Goldenberg et al., 2021; Tribble et al., 2021). The integration of foods with clinical practice will help gain a better prognosis, lower medical expenditure, and more general public health recommendations (Lee et al., 2019). Ocular drugs like latanoprost are usually obtained through chemical synthesis; however, the melatonin can also be detected in various edible animals and plants, which creates possibilities for “food is medicine.” The concentration of melatonin in foods depends heavily on the breed, and much higher melatonin is found in the generative organs of plants like seeds, while for animal foods, eggs and fish present higher contents than other meats (Ma et al., 2019). Several studies have observed the increase in the content of melatonin in serum and its metabolite 6-sulfatoxymelatonin in urine after consumption of beer, grape juice, pineapple, orange, and banana (Maldonado et al., 2009; González-Flores et al., 2012; Sae-Teaw et al., 2013). However, certain research reported the increasing amount of melatonin in the body could not match its intake from foods, and the clinical effects of dietary melatonin were still controversial, which might be ascribed to the individual variation, lack of effective detectable biomarkers in vivo, and uniform analyzing methods for melatonin in foods (Kennaway, 2017; Meng et al., 2017). Nonetheless, considering the limitation that clinical trials use melatonin in treating ocular diseases in the current situation and the potential synergistic effect with other medicines, the dietary melatonin should be given priority to patients when ingesting compared with synthesized melatonin from perspectives of safety and relative comprehensive nutrition. In this context, the prophylaxis usage of dietary melatonin can also be considered, and the clinical trials should also be facilitated to provide evidence-based interventions with the participation of clinicians and dietitians.
Data Availability Statement
The original contributions presented in the study are included in the article/Supplementary Material; further inquiries can be directed to the corresponding author.
Author Contributions
HY and YF conceived the study. HY and QW wrote the initial draft of the manuscript, and WW, WZ, and YF reviewed and revised the manuscript. All the authors made a substantial and intellectual contribution to the article and approved the submitted version.
Funding
This study was supported by the National Natural Science Foundation of China grants (Nos. 81700799; 82070926).
Conflict of Interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Publisher’s Note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors, and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.
Supplementary Material
The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fphar.2021.721869/full#supplementary-material
References
Adachi, A., Nogi, T., and Ebihara, S. (1998). Phase-relationship and Mutual Effects between Circadian Rhythms of Ocular Melatonin and Dopamine in the pigeon. Brain Res. 792 (2), 361–369. doi:10.1016/S0006-8993(98)00206-6
Ahn, J. H., Kim, H. D., Abuzar, S. M., Lee, J. Y., Jin, S. E., Kim, E. K., et al. (2017). Intracorneal Melatonin Delivery Using 2-Hydroxypropyl-β-Cyclodextrin Ophthalmic Solution for Granular Corneal Dystrophy Type 2. Int. J. Pharm. 529 (1-2), 608–616. doi:10.1016/j.ijpharm.2017.07.016
Alkozi, H., Sánchez-Naves, J., de Lara, M. J., Carracedo, G., Fonseca, B., Martinez-Aguila, A., et al. (2017a). Elevated Intraocular Pressure Increases Melatonin Levels in the Aqueous Humour. Acta Ophthalmol. 95 (3), e185–e189. doi:10.1111/aos.13253
Alkozi, H. A., Navarro, G., Franco, R., and Pintor, J. (2020). Melatonin and the Control of Intraocular Pressure. Prog. Retin. Eye Res. 75, 100798. doi:10.1016/j.preteyeres.2019.100798
Alkozi, H. A., Perez de Lara, M. J., and Pintor, J. (2017b). Melatonin Synthesis in the Human Ciliary Body Triggered by TRPV4 Activation: Involvement of AANAT Phosphorylation. Exp. Eye Res. 162, 1–8. doi:10.1016/j.exer.2017.06.018
Alkozi, H. A., Wang, X., Perez de Lara, M. J., and Pintor, J. (2017c). Presence of Melanopsin in Human Crystalline Lens Epithelial Cells and its Role in Melatonin Synthesis. Exp. Eye Res. 154, 168–176. doi:10.1016/j.exer.2016.11.019
AlRyalat, S. A. S., Malkawi, L. W., and Momani, S. M. (2019). Comparing Bibliometric Analysis Using PubMed, Scopus, and Web of Science Databases. JoVE (152), e58494. doi:10.3791/58494
Andrews, C. D., Foster, R. G., Alexander, I., Vasudevan, S., Downes, S. M., Heneghan, C., et al. (2019). Sleep-wake Disturbance Related to Ocular Disease: A Systematic Review of Phase-Shifting Pharmaceutical Therapies. Translational Vis. Sci. Tech. 8 (3), 49. doi:10.1167/tvst.8.3.49
Aranda, M. L., Fleitas, M. F. G., Dieguez, H., Iaquinandi, A., Sande, P. H., Dorfman, D., et al. (2017). Melatonin as a Therapeutic Resource for Inflammatory Visual Diseases. Curr. Neuropharmacol 15 (7), 951–962. doi:10.2174/1570159X15666170113122120
Arranz-Romera, A., Davis, B. M., Bravo-Osuna, I., Esteban-Pérez, S., Molina-Martínez, I. T., Shamsher, E., et al. (2019). Simultaneous Co-delivery of Neuroprotective Drugs from Multi-Loaded PLGA Microspheres for the Treatment of Glaucoma. J. Control. Release 297, 26–38. doi:10.1016/j.jconrel.2019.01.012
Bai, C., Li, X., Gao, Y., Yuan, Z., Hu, P., Wang, H., et al. (2016). Melatonin Improves Reprogramming Efficiency and Proliferation of Bovine-Induced Pluripotent Stem Cells. J. Pineal Res. 61, 154–167. doi:10.1111/jpi.12334
Bartell, P. A., Miranda-Anaya, M., McIvor, W., and Menaker, M. (2007). Interactions between Dopamine and Melatonin Organize Circadian Rhythmicity in the Retina of the green iguana. J. Biol. Rhythms 22 (6), 515–523. doi:10.1177/0748730407308167
Benyassi, A., Schwartz, C., Coon, S. L., Klein, D. C., and Falcón, J. (2000). Melatonin Synthesis: Arylalkylamine N-Acetyltransferases in trout Retina and Pineal Organ Are Different. Neuroreport 11 (2), 255–258. doi:10.1097/00001756-200002070-00006
Berhidi, A., Csajbók, E., and Vasas, L. (2010). Author-overdose. When Will We Come Clean? – Asks the Medical Librarian. Orvosi Hetilap 151 (5), 184–192. doi:10.1556/oh.2010.28761
Bessone, C. D. V., Martinez, S. M., Luna, J. D., Marquez, M. A., Ramírez, M. L., Allemandi, D. A., et al. (2020). Neuroprotective Effect of Melatonin Loaded in Ethylcellulose Nanoparticles Applied Topically in a Retinal Degeneration Model in Rabbits. Exp. Eye Res. 200, 108222. doi:10.1016/j.exer.2020.108222
Burfield, H. J., Carkeet, A., and Ostrin, L. A. (2019). Ocular and Systemic Diurnal Rhythms in Emmetropic and Myopic Adults. Invest. Ophthalmol. Vis. Sci. 60 (6), 2237–2247. doi:10.1167/iovs.19-26711
Camargo, J. R., Andreotti, I. A. A., Kalinke, C., Henrique, J. M., Bonacin, J. A., and Janegitz, B. C. (2020). Waterproof Paper as a New Substrate to Construct a Disposable Sensor for the Electrochemical Determination of Paracetamol and Melatonin. Talanta 208, 120458. doi:10.1016/j.talanta.2019.120458
Campbell, M. C., Bunghardt, K., Kisilak, M. L., and Irving, E. L. (2012). Diurnal Rhythms of Spherical Refractive Error, Optical Axial Length, and Power in the Chick. Invest. Ophthalmol. Vis. Sci. 53 (10), 6245–6253. doi:10.1167/iovs.11-8844
Carbone, C., Manno, D., Serra, A., Musumeci, T., Pepe, V., Tisserand, C., et al. (2016). Innovative Hybrid vs Polymeric Nanocapsules: The Influence of the Cationic Lipid Coating on the "4S". Colloids Surf. B Biointerfaces 141, 450–457. doi:10.1016/j.colsurfb.2016.02.002
Carracedo-Rodríguez, G., Martínez-Águila, A., Rodriguez-Pomar, C., Bodas-Romero, J., Sanchez-Naves, J., and Pintor, J. (2020). Effect of Nutritional Supplement Based on Melatonin on the Intraocular Pressure in Normotensive Subjects. Int. Ophthalmol. 40 (2), 419–422. doi:10.1007/s10792-019-01199-1
Castaldo, R., Chappell, M. J., Byrne, H., Innominato, P. F., Hughes, S., Pescapè, A., et al. (2021). Detection of Melatonin-Onset in Real Settings via Wearable Sensors and Artificial Intelligence. A Pilot Study. Biomed. Signal Process. Control. 65, 102386. doi:10.1016/j.bspc.2020.102386
Chakraborty, R., Micic, G., Thorley, L., Nissen, T. R., Lovato, N., Collins, M. J., et al. (2021). Myopia, or Near-Sightedness, Is Associated with Delayed Melatonin Circadian Timing and Lower Melatonin Output in Young Adult Humans. Sleep 44 (3). doi:10.1093/sleep/zsaa208
Chatterji, B. P., Mehvash, G., and Roma, S. (2018). Ocular Stem Cells to Treat Retinal and Corneal Disorders. Toscj 5 (1), 31–46. doi:10.2174/1876893801805010031
Chen, C. (2006). CiteSpace II: Detecting and Visualizing Emerging Trends and Transient Patterns in Scientific Literature. J. Am. Soc. Inf. Sci. Tech. 57 (3), 359–377. doi:10.1002/asi.20317
Chesnokova, N. B., Beznos, O. V., Lozinskaya, N. A., Beyshenova, G. A., and Nesterova, T. V. (2016). Effect of Melatonin Instillations on the Clinical Course of Experimental Uveitis and Biochemical Processes in Tears and Aqueous Humor. Biomed. Khim 62 (2), 164–168. doi:10.18097/PBMC20166202164
Choi, S. I., Lee, E., Akuzum, B., Jeong, J. B., Maeng, Y. S., Kim, T. I., et al. (2017). Melatonin Reduces Endoplasmic Reticulum Stress and Corneal Dystrophy-Associated TGFBIp through Activation of Endoplasmic Reticulum-Associated Protein Degradation. J. Pineal Res. 63 (3). doi:10.1111/jpi.12426
Ciulla, L., Moorthy, M., Mathew, S., Siesky, B., Verticchio Vercellin, A. C., Price, D., et al. (2020). Circadian Rhythm and Glaucoma: What Do We Know? J. Glaucoma 29 (2), 127–132. doi:10.1097/ijg.0000000000001402
Crespo-Moral, M., Alkozi, H. A., Lopez-Garcia, A., Pintor, J. J., and Diebold, Y. (2018). Melatonin Receptors Are Present in the Porcine Ocular Surface and Are Involved in Ex Vivo Corneal Wound Healing. Invest. Ophthalmol. Vis. Sci. 59 (9), 2.
Crooke, A., Huete-Toral, F., Colligris, B., and Pintor, J. (2017). The Role and Therapeutic Potential of Melatonin in Age-Related Ocular Diseases. J. Pineal Res. 63 (2). doi:10.1111/jpi.12430
Dal Monte, M., Cammalleri, M., Amato, R., Pezzino, S., Corsaro, R., Bagnoli, P., et al. (2020). A Topical Formulation of Melatoninergic Compounds Exerts strong Hypotensive and Neuroprotective Effects in a Rat Model of Hypertensive Glaucoma. Int. J. Mol. Sci. 21 (23), 1–26. doi:10.3390/ijms21239267
Deng, Z., Wang, H., Chen, Z., and Wang, T. (2020). Bibliometric Analysis of Dendritic Epidermal T Cell (DETC) Research from 1983 to 2019. Front. Immunol. 11, 259. doi:10.3389/fimmu.2020.00259
Diéguez, H. H., González Fleitas, M. F., Aranda, M. L., Calanni, J. S., Keller Sarmiento, M. I., Chianelli, M. S., et al. (2020). Melatonin Protects the Retina from Experimental Nonexudative Age-Related Macular Degeneration in Mice. J. Pineal Res. 68 (4), e12643. doi:10.1111/jpi.12643
Downer, S., Berkowitz, S. A., Harlan, T. S., Olstad, D. L., Mozaffarian, D., and Mozaffarian, D. (2020). Food Is Medicine: Actions to Integrate Food and Nutrition into Healthcare. BMJ 369, m2482. doi:10.1136/bmj.m2482
Doğanlar, Z. B., Güçlü, H., Öztopuz, Ö., Türkön, H., Dogan, A., Uzun, M., et al. (2019). The Role of Melatonin in Oxidative Stress, DNA Damage, Apoptosis and Angiogenesis in Fetal Eye under Preeclampsia and Melatonin Deficiency Stress. Curr. Eye Res. 44 (10), 1157–1169. doi:10.1080/02713683.2019.1619778
Duan, D., Ding, Y., Li, L., and Ma, G. (2020). Rapid Quantitative Detection of Melatonin by Electrochemical Sensor Based on Carbon Nanofibers Embedded with FeCo alloy Nanoparticles. J. Electroanalytical Chem. 873, 114422. doi:10.1016/j.jelechem.2020.114422
Faillace, M. P., Cutrera, R., Sarmiento, M. I., and Rosenstein, R. E. (1995). Evidence for Local Synthesis of Melatonin in golden Hamster Retina. NeuroReport 6 (15), 2093–2095. doi:10.1097/00001756-199510010-00033
Falcón, J., Thibault, C., Martin, C., Brun-Marmillon, J., Claustrat, B., and Collin, J. P. (1991). Regulation of Melatonin Production by Catecholamines and Adenosine in a Photoreceptive Pineal Organ. An In Vitro Study in the pike and the trout. J. Pineal Res. 11 (3-4), 123–134. doi:10.1111/j.1600-079X.1991.tb00467.x
Fan, C., Feng, J., Tang, C., Zhang, Z., Feng, Y., Duan, W., et al. (2020). Melatonin Suppresses ER Stress-dependent Proapoptotic Effects via AMPK in Bone Mesenchymal Stem Cells during Mitochondrial Oxidative Damage. Stem Cel Res Ther 11 (1), 442. doi:10.1186/s13287-020-01948-5
Feigl, B., and Zele, A. J. (2014). Melanopsin-expressing Intrinsically Photosensitive Retinal Ganglion Cells in Retinal Disease. Optom. Vis. Sci. 91 (8), 894–903. doi:10.1097/OPX.0000000000000284
Ferreira de Melo, I. M., Martins Ferreira, C. G., Lima da Silva Souza, E. H., Almeida, L. L., Bezerra de Sá, F., Cavalcanti Lapa Neto, C. J., et al. (2020). Melatonin Regulates the Expression of Inflammatory Cytokines, VEGF and Apoptosis in Diabetic Retinopathy in Rats. Chem. Biol. Interact 327, 109183. doi:10.1016/j.cbi.2020.109183
Flanagan, S. C., Cobice, D., Richardson, P., Sittlington, J. J., and Saunders, K. J. (2020). Elevated Melatonin Levels Found in Young Myopic Adults Are Not Attributable to a Shift in Circadian Phase. Invest. Ophthalmol. Vis. Sci. 61 (8), 45. doi:10.1167/IOVS.61.8.45
Gao, Y., Ma, L., Bai, C., Zhang, X., and Yang, W. (2019). Melatonin Promotes Self-Renewal and Nestin Expression in Neural Stem Cells from the Retina. Histol. Histopathol 34 (6), 645–654. doi:10.14670/HH-18-065
García-Caballero, C., Lieppman, B., Arranz-Romera, A., Molina-Martínez, I. T., Bravo-Osuna, I., Young, M., et al. (2018). Photoreceptor Preservation Induced by Intravitreal Controlled Delivery of Gdnf and Gdnf/melatonin in Rhodopsin Knockout Mice. Mol. Vis. 24, 733–745.
Giannaccare, G., Carnevali, A., Senni, C., Logozzo, L., and Scorcia, V. (2020). Umbilical Cord Blood and Serum for the Treatment of Ocular Diseases: A Comprehensive Review. Ophthalmol. Ther. 9 (2), 235–248. doi:10.1007/s40123-020-00239-9
Gillette, M. U., and McArthur, A. J. (1995). Circadian Actions of Melatonin at the Suprachiasmatic Nucleus. Behav. Brain Res. 73 (1-2), 135–139. doi:10.1016/0166-4328(96)00085-X
Goel, M., and Mangel, S. C. (2021). Dopamine-Mediated Circadian and Light/Dark-Adaptive Modulation of Chemical and Electrical Synapses in the Outer Retina. Front. Cel. Neurosci. 15, 18. doi:10.3389/fncel.2021.647541
Goldenberg, J. Z., Day, A., Brinkworth, G. D., Sato, J., Yamada, S., Jönsson, T., et al. (2021). Efficacy and Safety of Low and Very Low Carbohydrate Diets for Type 2 Diabetes Remission: Systematic Review and Meta-Analysis of Published and Unpublished Randomized Trial Data. Bmj 372, m4743. doi:10.1136/bmj.m4743
González-Flores, D., Gamero, E., Garrido, M., Ramírez, R., Moreno, D., Delgado, J., et al. (2012). Urinary 6-sulfatoxymelatonin and Total Antioxidant Capacity Increase after the Intake of a Grape Juice Cv. Tempranillo Stabilized with HHP. Food Funct. 3 (1), 34–39. doi:10.1039/c1fo10146c
Gubin, D., Neroev, V., Malishevskaya, T., Cornelissen, G., Astakhov, S. Y., Kolomeichuk, S., et al. (2021). Melatonin Mitigates Disrupted Circadian Rhythms, Lowers Intraocular Pressure, and Improves Retinal Ganglion Cells Function in Glaucoma. J. Pineal Res. 70 (4), e12730. doi:10.1111/jpi.12730
Hafner, A., Lovrić, J., Romić, M. D., Juretić, M., Pepić, I., Cetina-Čižmek, B., et al. (2015). Evaluation of Cationic Nanosystems with Melatonin Using an Eye-Related Bioavailability Prediction Model. Eur. J. Pharm. Sci. 75, 142–150. doi:10.1016/j.ejps.2015.04.003
Hannibal, J., Christiansen, A. T., Heegaard, S., Fahrenkrug, J., and Kiilgaard, J. F. (2017). Melanopsin Expressing Human Retinal Ganglion Cells: Subtypes, Distribution, and Intraretinal Connectivity. J. Comp. Neurol. 525 (8), 1934–1961. doi:10.1002/cne.24181
Hardeland, R. (2019). Aging, Melatonin, and the Pro- and Anti-inflammatory Networks. Int. J. Mol. Sci. 20 (5). doi:10.3390/ijms20051223
Harpsøe, N. G., Andersen, L. P. H., Gögenur, I., and Rosenberg, J. (2015). Clinical Pharmacokinetics of Melatonin: A Systematic Review. Eur. J. Clin. Pharmacol. 71 (8), 901–909. doi:10.1007/s00228-015-1873-4
Ismail, S. A., and Mowafi, H. A. (2009). Melatonin Provides Anxiolysis, Enhances Analgesia, Decreases Intraocular Pressure, and Promotes Better Operating Conditions during Cataract Surgery under Topical Anesthesia. Anesth. Analg 108 (4), 1146–1151. doi:10.1213/ane.0b013e3181907ebe
Jappe, A. (2020). Professional Standards in Bibliometric Research Evaluation? A Meta-Evaluation of European Assessment Practice 2005-2019. Plos One 15 (4). doi:10.1371/journal.pone.0231735
Kearney, S., O'Donoghue, L., Pourshahidi, L. K., Cobice, D., and Saunders, K. J. (2017). Myopes Have Significantly Higher Serum Melatonin Concentrations Than Non-myopes. Ophthalmic Physiol. Opt. 37 (5), 557–567. doi:10.1111/opo.12396
Kennaway, D. J. (2017). Are the Proposed Benefits of Melatonin-Rich Foods Too Hard to Swallow? Crit. Rev. Food Sci. Nutr. 57 (5), 958–962. doi:10.1080/10408398.2014.962686
Kiliç, A., Selek, S., Erel, O., and Aksoy, N. (2008). Protective Effects of Melatonin on Oxidative-Antioxidative Balance and Cataract Formation in Rats. Ann. Ophthalmol. (Skokie) 40 (1), 22–27.
Klettner, A., Kampers, M., Töbelmann, D., Roider, J., and Dittmar, M. (2021). The Influence of Melatonin and Light on Vegf Secretion in Primary Rpe Cells. Biomolecules 11 (1), 1–13. doi:10.3390/biom11010114
Kumar, N., and Goyal, R. N. (2020). Simultaneous Determination of Melatonin and 5-hydroxytrptophan at the Disposable Poly-(melamine)/poly-(o-Aminophenol) Composite Modified Screen Printed Sensor. J. Electroanalytical Chem. 874, 114458. doi:10.1016/j.jelechem.2020.114458
Kunst, S., Wolloscheck, T., Kelleher, D. K., Wolfrum, U., Sargsyan, S. A., Iuvone, P. M., et al. (2015). Pgc-1α and Nr4a1 Are Target Genes of Circadian Melatonin and Dopamine Release in Murine Retina. Invest. Ophthalmol. Vis. Sci. 56 (10), 6084–6094. doi:10.1167/iovs.15-17503
Landis, E. G., Park, H. N., Chrenek, M., He, L., Sidhu, C., Chakraborty, R., et al. (2021). Ambient Light Regulates Retinal Dopamine Signaling and Myopia Susceptibility. Invest. Ophthalmol. Vis. Sci. 62 (1), 28. doi:10.1167/iovs.62.1.28
Lavoie, J., Gagné, A. M., Lavoie, M. P., Sasseville, A., Charron, M. C., and Hébert, M. (2010). Circadian Variation in the Electroretinogram and the Presence of central Melatonin. Doc Ophthalmol. 120 (3), 265–272. doi:10.1007/s10633-010-9221-6
Lavoie, J., Rosolen, S. G., Chalier, C., and Hébert, M. (2013). Negative Impact of Melatonin Ingestion on the Photopic Electroretinogram of Dogs. Neurosci. Lett. 543, 78–83. doi:10.1016/j.neulet.2013.02.070
Lee, S., Le, N. H., and Kang, D. (2018). Melatonin Alleviates Oxidative Stress-Inhibited Osteogenesis of Human Bone Marrow-Derived Mesenchymal Stem Cells through AMPK Activation. Int. J. Med. Sci. 15 (10), 1083–1091. doi:10.7150/ijms.26314
Lee, Y., Mozaffarian, D., Sy, S., Huang, Y., Liu, J., Wilde, P. E., et al. (2019). Cost-effectiveness of Financial Incentives for Improving Diet and Health through Medicare and Medicaid: A Microsimulation Study. Plos Med. 16 (3), e1002761. doi:10.1371/journal.pmed.1002761
Legros, C., Dupré, C., Brasseur, C., Bonnaud, A., Bruno, O., Valour, D., et al. (2020). Characterization of the Various Functional Pathways Elicited by Synthetic Agonists or Antagonists at the Melatonin MT1 and MT2 Receptors. Pharmacol. Res. Perspect. 8 (1), e00539. doi:10.1002/prp2.539
Leidl, M. C., Choi, C. J., Syed, Z. A., and Melki, S. A. (2014). Intraocular Pressure Fluctuation and Glaucoma Progression: What Do We Know? Br. J. Ophthalmol. 98 (10), 1315–1319. doi:10.1136/bjophthalmol-2013-303980
Lin, Y., Ren, X., Chen, Y., and Chen, D. (2021). Interaction between Mesenchymal Stem Cells and Retinal Degenerative Microenvironment. Front. Neurosci. 14. doi:10.3389/fnins.2020.617377
Liu, S., Sun, Y. P., Gao, X. L., and Sui, Y. (2019). Knowledge Domain and Emerging Trends in Alzheimer's Disease: A Scientometric Review Based on CiteSpace Analysis. Neural Regen. Res. 14 (9), 1643–1650. doi:10.4103/1673-5374.255995
Lledó, V. E., Alkozi, H. A., and Pintor, J. (2019). Yellow Filter Effect on Melatonin Secretion in the Eye: Role in IOP Regulation. Curr. Eye Res. 44 (6), 614–618. doi:10.1080/02713683.2019.1570276
Lorenc-Duda, A., Berezińska, M., Urbańska, A., Gołembiowska, K., and Zawilska, J. B. (2009). Dopamine in the Turkey Retina-An Impact of Environmental Light, Circadian Clock, and Melatonin. J. Mol. Neurosci. 38 (1), 12–18. doi:10.1007/s12031-008-9153-8
Ma, Z. F., Ahmad, J., Khan, I., Wang, C. W., Jiang, P., and Zhang, Y. (2019). Interaction of Phytochemicals from Walnut on Health: An Updated Comprehensive Review of Reported Bioactivities and Medicinal Properties of Walnut. J. Biologically Active Prod. Nat. 9 (6), 410–425. doi:10.1080/22311866.2019.1709900
Madelaine, R., and Mourrain, P. (2017). Endogenous Retinal Neural Stem Cell Reprogramming for Neuronal Regeneration. Neural Regen. Res. 12 (11), 1765–1767. doi:10.4103/1673-5374.219028
Majidinia, M., Reiter, R. J., Shakouri, S. K., Mohebbi, I., Rastegar, M., Kaviani, M., et al. (2018). The Multiple Functions of Melatonin in Regenerative Medicine. Ageing Res. Rev. 45, 33–52. doi:10.1016/j.arr.2018.04.003
Maldonado, M. D., Moreno, H., and Calvo, J. R. (2009). Melatonin Present in Beer Contributes to Increase the Levels of Melatonin and Antioxidant Capacity of the Human Serum. Clin. Nutr. 28 (2), 188–191. doi:10.1016/j.clnu.2009.02.001
Martínez-Águila, A., Martín-Gil, A., Carpena-Torres, C., Pastrana, C., and Carracedo, G. (2021). Influence of Circadian Rhythm in the Eye: Significance of Melatonin in Glaucoma. Biomolecules 11 (3), 340. doi:10.3390/biom11030340
Mayo, J. C., and Sainz, R. M. (2020). Melatonin from an Antioxidant to a Classic Hormone or a Tissue Factor: Experimental and Clinical Aspects 2019. Int. J. Mol. Sci. 21 (10). doi:10.3390/ijms21103645
Mazurais, D., Brierley, I., Anglade, I., Drew, J., Randall, C., Bromage, N., et al. (1999). Central Melatonin Receptors in the Rainbow trout: Comparative Distribution of Ligand Binding and Gene Expression. J. Comp. Neurol. 409 (2), 313–324. doi:10.1002/(sici)1096-9861(19990628)409:2<313::Aid-cne11>3.0.Co10.1002/(sici)1096-9861(19990628)409:2<313::aid-cne11>3.0.co;2-1
Mehrzadi, S., Hemati, K., Reiter, R. J., and Hosseinzadeh, A. (2020). Mitochondrial Dysfunction in Age-Related Macular Degeneration: Melatonin as a Potential Treatment. Expert Opin. Ther. Targets 24 (4), 359–378. doi:10.1080/14728222.2020.1737015
Meng, X., Li, Y., Li, S., Zhou, Y., Gan, R. Y., Xu, D. P., et al. (2017). Dietary Sources and Bioactivities of Melatonin. Nutrients 9 (4). doi:10.3390/nu9040367
Mhatre, M. C., van Jaarsveld, A. S., and Reiter, R. J. (1988). Melatonin in the Lacrimal Gland: First Demonstration and Experimental Manipulation. Biochem. Biophys. Res. Commun. 153 (3), 1186–1192. doi:10.1016/S0006-291X(88)81353-6
Moradkhani, F., Moloudizargari, M., Fallah, M., Asghari, N., Heidari Khoei, H., and Asghari, M. H. (2020). Immunoregulatory Role of Melatonin in Cancer. J. Cel Physiol 235 (2), 745–757. doi:10.1002/jcp.29036
Mul Fedele, M. L., Galiana, M. D., Golombek, D. A., Muñoz, E. M., and Plano, S. A. (2018). Alterations in Metabolism and Diurnal Rhythms Following Bilateral Surgical Removal of the superior Cervical Ganglia in Rats. Front. Endocrinol. 8 (JAN). doi:10.3389/fendo.2017.00370
Münch, M., Ladaique, M., Roemer, S., Hashemi, K., and Kawasaki, A. (2017). Melanopsin-Mediated Acute Light Responses Measured in winter and in Summer: Seasonal Variations in Adults with and without Cataracts. Front. Neurol. 8 (SEP), 464. doi:10.3389/fneur.2017.00464
Musumeci, T., Bucolo, C., Carbone, C., Pignatello, R., Drago, F., and Puglisi, G. (2013). Polymeric Nanoparticles Augment the Ocular Hypotensive Effect of Melatonin in Rabbits. Int. J. Pharm. 440 (2), 135–140. doi:10.1016/j.ijpharm.2012.10.014
Navarro Gil, F. J., Huete-Toral, F., Crooke, A., Dominguez Godinez, C. O., Carracedo, G., and Pintor, J. (2019). Effect of Melatonin and its Analogs on Tear Secretion. J. Pharmacol. Exp. Ther. 371 (1), 186–190. doi:10.1124/jpet.119.259192
Nosjean, O., Nicolas, J. P., Klupsch, F., Delagrange, P., Canet, E., and Boutin, J. A. (2001). Comparative Pharmacological Studies of Melatonin Receptors: MT1, MT2 and MT3/QR2. Tissue Distribution of MT3/QR2. Biochem. Pharmacol. 61 (11), 1369–1379. doi:10.1016/S0006-2952(01)00615-3
Ohanness, A. K., Hussain, S. A. R., Rasool, A. A. H. A., Mohammed, H. M., Al-Essa, A., and Abdulrazzaq, M. H. (2009). Protective Effects of Melatonin as an Eye Drops against Selenite-Induced Cataract in Rat Pups. Saudi Pharm. J. 17 (2), 148–153.
Özen Çınar, İ. (2020). Bibliometric Analysis of Breast Cancer Research in the Period 2009–2018. Int. J. Nurs. Pract. 26 (3). doi:10.1111/ijn.12845
Paul, P., Lahaye, C., Delagrange, P., Nicolas, J. P., Canet, E., and Boutin, J. A. (1999). Characterization of 2-[125I]iodomelatonin Binding Sites in Syrian Hamster Peripheral Organs. J. Pharmacol. Exp. Ther. 290 (1), 334–340.
Pescosolido, N., Gatto, V., Stefanucci, A., and Rusciano, D. (2015). Oral Treatment with the Melatonin Agonist Agomelatine Lowers the Intraocular Pressure of Glaucoma Patients. Ophthalmic Physiol. Opt. 35 (2), 201–205. doi:10.1111/opo.12189
Ping, Z., Hu, X., Wang, L., Shi, J., Tao, Y., Wu, X., et al. (2017). Melatonin Attenuates Titanium Particle-Induced Osteolysis via Activation of Wnt/β-Catenin Signaling Pathway. Acta Biomater. 51, 513–525. doi:10.1016/j.actbio.2017.01.034
Pontelli, R. C. N., Souza, M. C. O., Fantucci, M. Z., de Andrade, M., and Rocha, E. M. (2019). The Role of Endocrine Disruptors in Ocular Surface Diseases. Med. Hypotheses 122, 157–164. doi:10.1016/j.mehy.2018.11.009
Prayag, A. S., Jost, S., Avouac, P., Dumortier, D., and Gronfier, C. (2019a). Dynamics of Non-visual Responses in Humans: As Fast as Lightning? Front. Neurosci. 13, 126. doi:10.3389/fnins.2019.00126
Prayag, A. S., Najjar, R. P., and Gronfier, C. (2019b). Melatonin Suppression Is Exquisitely Sensitive to Light and Primarily Driven by Melanopsin in Humans. J. Pineal Res. 66 (4), e12562. doi:10.1111/jpi.12562
Quinteros, D., Vicario-De-La-Torre, M., Andrés-Guerrero, V., Palma, S., Allemandi, D., Herrero-Vanrell, R., et al. (2014). Hybrid Formulations of Liposomes and Bioadhesive Polymers Improve the Hypotensive Effect of the Melatonin Analogue 5-MCA-NAT in Rabbit Eyes. PLoS ONE 9 (10), e110344. doi:10.1371/journal.pone.0110344
Rada, J. A., and Wiechmann, A. F. (2006). Melatonin Receptors in Chick Ocular Tissues: Implications for a Role of Melatonin in Ocular Growth Regulation. Invest. Ophthalmol. Vis. Sci. 47 (1), 25–33. doi:10.1167/iovs.05-0195
Ramezani, M., Komaki, A., Hashemi-Firouzi, N., Mortezaee, K., Faraji, N., and Golipoor, Z. (2020). Therapeutic Effects of Melatonin-Treated Bone Marrow Mesenchymal Stem Cells (BMSC) in a Rat Model of Alzheimer's Disease. J. Chem. Neuroanat. 108, 101804. doi:10.1016/j.jchemneu.2020.101804
Ramos, E., Gil-Martín, E., and Romero, A. (2020). Advances in Molecular Toxicology. Elsevier B.V.Melatonin and Neurodegeneration: From Neurotoxic Environment to Cell Resilience
Reyes-Resina, I., Awad Alkozi, H., del Ser-Badia, A., Sánchez-Naves, J., Lillo, J., Jiménez, J., et al. (2020). Expression of Melatonin and Dopamine D3 Receptor Heteromers in Eye Ciliary Body Epithelial Cells and Negative Correlation with Ocular Hypertension. Cells 9 (1), 20. doi:10.3390/cells9010152
Roth, T., Nir, T., and Zisapel, N. (2015). Prolonged Release Melatonin for Improving Sleep in Totally Blind Subjects: A Pilot Placebo-Controlled Multicenter Trial. Nat. Sci. Sleep 7, 13–23. doi:10.2147/NSS.S71838
Sae-Teaw, M., Johns, J., Johns, N. P., and Subongkot, S. (2013). Serum Melatonin Levels and Antioxidant Capacities after Consumption of Pineapple, orange, or Banana by Healthy Male Volunteers. J. Pineal Res. 55 (1), 58–64. doi:10.1111/jpi.12025
Salih, M., Shaharuddin, B., and Abdelrazeg, S. (2020). A Concise Review on Mesenchymal Stem Cells for Tissue Engineering with a Perspective on Ocular Surface Regeneration. Curr. Stem Cel Res Ther 15 (3), 211–218. doi:10.2174/1574888X15666200129145251
Sande, P. H., Dorfman, D., Fernandez, D. C., Chianelli, M., Domínguez Rubio, A. P., Franchi, A. M., et al. (2014). Treatment with Melatonin after Onset of Experimental Uveitis Attenuates Ocular Inflammation. Br. J. Pharmacol. 171 (24), 5696–5707. doi:10.1111/bph.12873
Sato, S., Peshenko, I. V., Olshevskaya, E. V., Kefalov, V. J., and Dizhoor, A. M. (2018). GUCY2D Cone-Rod Dystrophy-6 Is a "Phototransduction Disease" Triggered by Abnormal Calcium Feedback on Retinal Membrane Guanylyl Cyclase 1. J. Neurosci. 38 (12), 2990–3000. doi:10.1523/jneurosci.2985-17.2018
Savaskan, E., Wirz-Justice, A., Olivieri, G., Pache, M., Kräuchi, K., Brydon, L., et al. (2002). Distribution of Melatonin MT1 Receptor Immunoreactivity in Human Retina. J. Histochem. Cytochem. 50 (4), 519–526. doi:10.1177/002215540205000408
Seiden, D. J., and Shah, S. M. (2019). A Randomized, Crossover, Pharmacokinetics Evaluation of a Novel Continuous Release and Absorption Melatonin Formulation. Prim. Care Companion CNS Disord. 21 (4). doi:10.4088/PCC.19m02450
Shenshen, Y., Minshu, W., Qing, Y., Yang, L., Suodi, Z., and Wei, W. (2016). The Effect of Cataract Surgery on Salivary Melatonin and Sleep Quality in Aging People. Chronobiol Int. 33 (8), 1064–1072. doi:10.1080/07420528.2016.1197234
Singh, S. S., Deb, A., and Sutradhar, S. (2017). Dexamethasone Modulates Melatonin MT2 Receptor Expression in Splenic Tissue and Humoral Immune Response in Mice. Biol. Rhythm Res. 48 (3), 425–435. doi:10.1080/09291016.2016.1268330
Spitschan, M. (2019). Melanopsin Contributions to Non-visual and Visual Function. Curr. Opin. Behav. Sci. 30, 67–72. doi:10.1016/j.cobeha.2019.06.004
Tao, Y., Hu, B., Ma, Z., Li, H., Du, E., Wang, G., et al. (2020). Intravitreous Delivery of Melatonin Affects the Retinal Neuron Survival and Visual Signal Transmission: In Vivo and Ex Vivo Study. Drug Deliv. 27 (1), 1386–1396. doi:10.1080/10717544.2020.1818882
Teymourian, H., Parrilla, M., Sempionatto, J. R., Montiel, N. F., Barfidokht, A., Van Echelpoel, R., et al. (2020). Wearable Electrochemical Sensors for the Monitoring and Screening of Drugs. ACS Sens 5 (9), 2679–2700. doi:10.1021/acssensors.0c01318
Tosini, G., and Menaker, M. (1996). Circadian Rhythms in Cultured Mammalian Retina. Science 272 (5260), 419–421. doi:10.1126/science.272.5260.419
Tribble, J. R., Hui, F., Jöe, M., Bell, K., Chrysostomou, V., Crowston, J. G., et al. (2021). Targeting Diet and Exercise for Neuroprotection and Neurorecovery in Glaucoma. Cells 10 (2), 295. doi:10.3390/cells10020295
Turner, P. L., Van Someren, E. J., and Mainster, M. A. (2010). The Role of Environmental Light in Sleep and Health: Effects of Ocular Aging and Cataract Surgery. Sleep Med. Rev. 14 (4), 269–280. doi:10.1016/j.smrv.2009.11.002
Valera-Gran, D., Prieto-Botella, D., Peral-Gómez, P., Hurtado-Pomares, M., Sánchez-Pérez, A., and Navarrete-Muñoz, E. M. (2020). Bibliometric Analysis of Research on Telomere Length in Children: A Review of Scientific Literature. Int. J. Environ. Res. Public Health 17 (12), 1–17. doi:10.3390/ijerph17124593
Wang, B., Zuo, X., Peng, L., Wang, X., Zeng, H., Zhong, J., et al. (2021a). Melatonin Ameliorates Oxidative Stress-Mediated Injuries through Induction of HO-1 and Restores Autophagic Flux in Dry Eye. Exp. Eye Res. 205, 108491. doi:10.1016/j.exer.2021.108491
Wang, J., Cheng, T., Zhang, B., Xiong, S., Zhao, H., Li, Q., et al. (2021b). Puberty Could Regulate the Effects of Outdoor Time on Refractive Development in Chinese Children and Adolescents. Br. J. Ophthalmol. 105 (2), 191–197. doi:10.1136/bjophthalmol-2019-315636
Wang, W.-Y., Chen, C., Chang, J., Chien, L., Shih, Y.-F., Lin, L. L. K., et al. (2021c). Pharmacotherapeutic Candidates for Myopia: A Review. Biomed. Pharmacother. 133, 111092. doi:10.1016/j.biopha.2020.111092
Waqas, A., Teoh, S. H., Lapão, L. V., Messina, L. A., and Correia, J. C. (2020). Harnessing Telemedicine for the Provision of Health Care: Bibliometric and Scientometric Analysis. J. Med. Internet Res. 22 (10). doi:10.2196/18835
Wiechmann, A. F., and Rada, J. A. (2003). Melatonin Receptor Expression in the Cornea and Sclera. Exp. Eye Res. 77 (2), 219–225. doi:10.1016/S0014-4835(03)00126-X
Yan, J., Chen, X., Pu, C., Zhao, Y., Liu, X., Liu, T., et al. (2020). Synovium Stem Cell-Derived Matrix Enhances Anti-inflammatory Properties of Rabbit Articular Chondrocytes via the SIRT1 Pathway. Mater. Sci. Eng. C Mater. Biol. Appl. 106, 110286. doi:10.1016/j.msec.2019.110286
Yao, L., Hui, L., Yang, Z., Chen, X., and Xiao, A. (2020). Freshwater Microplastics Pollution: Detecting and Visualizing Emerging Trends Based on Citespace II. Chemosphere 245, 125627. doi:10.1016/j.chemosphere.2019.125627
Yilmaz, T., Naziroğlu, M., Çelebi, S., Özercan, H. I., and Kükner, A. S. (2004). Administration of High Dose Intravitreal Melatonin Degenerates Retinal Cells in guinea Pigs. Pathophysiology 11 (2), 107–111. doi:10.1016/j.pathophys.2004.06.006
Yoon, Y. M., Lee, J. H., Song, K. H., Noh, H., and Lee, S. H. (2020). Melatonin-stimulated Exosomes Enhance the Regenerative Potential of Chronic Kidney Disease-Derived Mesenchymal Stem/stromal Cells via Cellular Prion Proteins. J. Pineal Res. 68 (3), e12632. doi:10.1111/jpi.12632
Yu, H., Wu, W., Lin, X., and Feng, Y. (2020). Polysaccharide-Based Nanomaterials for Ocular Drug Delivery: A Perspective. Front. Bioeng. Biotechnol. 8 (1365). doi:10.3389/fbioe.2020.601246
Zawilska, J. B., Berezińska, M., Rosiak, J., Skene, D. J., Vivien-Roels, B., and Nowak, J. Z. (2004). Suppression of Melatonin Biosynthesis in the Chicken Pineal Gland by Retinally Perceived Light - Involvement of D1-Dopamine Receptors. J. Pineal Res. 36 (2), 80–86. doi:10.1046/j.1600-079X.2003.00101.x
Zheng, W., Chen, Y., Zhou, X., Zhang, X., Chen, Y., Guan, X., et al. (2020). Regulation of Retinal Melanopsin on Lens-Induced Myopia in guinea Pigs. Optom. Vis. Sci. 97 (7), 489–495. doi:10.1097/OPX.0000000000001529
Zhu, X., Hu, J., Deng, S., Tan, Y., Qiu, C., Zhang, M., et al. (2021). Bibliometric and Visual Analysis of Research on the Links between the Gut Microbiota and Depression from 1999 to 2019. Front. Psychiatry 11. doi:10.3389/fpsyt.2020.587670
Keywords: melatonin, circadian rhythms, ocular diseases, therapeutics, pharmacology
Citation: Yu H, Wang Q, Wu W, Zeng W and Feng Y (2021) Therapeutic Effects of Melatonin on Ocular Diseases: Knowledge Map and Perspective. Front. Pharmacol. 12:721869. doi: 10.3389/fphar.2021.721869
Received: 07 June 2021; Accepted: 30 September 2021;
Published: 02 November 2021.
Edited by:
Jijing Pang, He Eye Specialist Hospital, ChinaReviewed by:
Yun Qian, Shanghai Jiao Tong University, ChinaKenkichi Baba, Morehouse School of Medicine, United States
Copyright © 2021 Yu, Wang, Wu, Zeng and Feng. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Yun Feng, fengyun@bjmu.edu.cn