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MINI REVIEW article

Front. Ophthalmol. , 28 March 2025

Sec. Glaucoma

Volume 5 - 2025 | https://doi.org/10.3389/fopht.2025.1554777

Real-world impact of latanoprostene bunod ophthalmic solution 0.024% in glaucoma therapy: a narrative review

W. Daniel StamerW. Daniel Stamer1Thomas ChiuThomas Chiu2Da-Wen LuDa-Wen Lu3Tsing Hong WangTsing Hong Wang4Prin RojanapongpunPrin Rojanapongpun5Ngamkae RuangvaravateNgamkae Ruangvaravate6Youn Hye JoYoun Hye Jo7Marlene R. Moster,Marlene R. Moster8,9Murray FingeretMurray Fingeret10Nora Lee CothranNora Lee Cothran11Jessica SteenJessica Steen12Ian Benjamin GaddieIan Benjamin Gaddie13
mür Uakhan-GündüzÖmür Uçakhan-Gündüz14Wesam Shamseldin Shalaby,Wesam Shamseldin Shalaby9,15Cindy M. L. Hutnik*Cindy M. L. Hutnik16*
  • 1Department of Ophthalmology, School of Medicine, Duke University, Durham, NC, United States
  • 2The Chinese University of Hong Kong, Hong Kong Eye Hospital, Hong Kong, Hong Kong SAR, China
  • 3Department of Ophthalmology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
  • 4Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
  • 5Chulalongkorn University & King Chulalongkorn Memorial Hospital, Bangkok, Thailand
  • 6Siriraj Hospital, Mahidol University, Bangkok, Thailand
  • 7Department of Ophthalmology, Seoul Konkuk University Hospital, Seoul, Republic of Korea
  • 8Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States
  • 9Department of Ophthalmology, Wills Eye Hospital, Philadelphia, PA, United States
  • 10State University of New York, College of Optometry, New York, NY, United States
  • 11Department of Glaucoma, The Eye Institute of West Florida, Largo, FL, United States
  • 12Nova Southeastern University College of Optometry, Fort Lauderdale, FL, United States
  • 13Gaddie Eye Centers, Louisville, KY, United States
  • 14Ankara University School of Medicine, Ankara, Türkiye
  • 15Tanta Medical School, Tanta University, Tanta, Gharbia, Egypt
  • 16Ivey Eye Institute, Western University, London, ON, Canada

Latanoprostene bunod ophthalmic solution (LBN) 0.024% is a topical nitric oxide (NO)-donating prostaglandin F2α (PGF2α) analog first approved in November 2017 for reduction of intraocular pressure (IOP) in patients with ocular hypertension (OHT) or open-angle glaucoma (OAG). This narrative review describes the unique mechanism of action of LBN and summarizes available real-world data. Upon instillation, LBN is metabolized into latanoprost acid and butanediol mononitrate, which is further reduced to NO and an inactive metabolite. Latanoprost acid increases aqueous humor outflow primarily through the uveoscleral (unconventional) pathway, whereas NO increases outflow through the trabecular (conventional) pathway. Eight studies were identified: 2 studies in newly diagnosed, treatment-naïve patients with OHT or OAG, 4 studies of adjunctive therapy in patients with glaucoma receiving other IOP-lowering therapies, and 2 studies in which patients with glaucoma switched to LBN monotherapy or adjunctive therapy. Decreases in IOP after initiating LBN in newly diagnosed patients or adding/switching to LBN were generally consistent with reductions observed in clinical trials and sustained throughout the studies. Rates of discontinuation due to inadequate IOP lowering ranged from 12.2% to 17.1%. LBN was generally well tolerated in real-world studies; the most common adverse events were consistent with the known safety profile of LBN. Data from real-world studies provide important insights regarding the potential effectiveness and tolerability of LBN in the clinical setting and suggest that LBN is well tolerated and associated with significant, clinically meaningful, and durable reductions in IOP.

1 Introduction

Pharmacotherapy for intraocular pressure (IOP) lowering is the most common first-line intervention for open-angle glaucoma (OAG) (13). Topical prostaglandin analogs (PGAs) are often selected as initial therapy based on established efficacy and tolerability and a convenient dosing regimen, requiring only 1 drop per day (13). Alternative medications include topical beta-adrenergic antagonists, alpha2-adrenergic agonists, parasympathomimetics, rho-kinase inhibitors, and topical and oral carbonic anhydrase inhibitors (2). Patients may require a combination of IOP-lowering agents from different classes to adequately control IOP (13).

Latanoprostene bunod ophthalmic solution (LBN) 0.024% (heretofore referred to as LBN), the first topical nitric oxide (NO)-donating prostaglandin F2α (PGF2α) analog, was developed to provide greater and more efficient IOP lowering by combining the complementary mechanisms of action of PGF2α and NO into a single drug (46). A phase 1 study (KRONUS) in healthy Japanese male volunteers demonstrated significant reductions from baseline in 24-hour IOP over 14 days of treatment with LBN, supporting a potential benefit in OAG even with normal IOP (7). In the phase 2 VOYAGER study, once-daily LBN 0.024% provided significantly greater diurnal IOP lowering than once-daily latanoprost 0.005% over 28 days in patients with ocular hypertension (OHT) or OAG and achieved diurnal IOP ≤18 mm Hg in a significantly higher proportion of patients versus latanoprost at all study visits (8).

Compared to twice-daily timolol maleate 0.5%, once-daily LBN administered to patients with OHT or OAG significantly reduced nocturnal IOP and increased nocturnal ocular perfusion pressure (phase 2 CONSTELLATION study) (9), consistently produced significantly greater reductions in mean diurnal IOP over 3 months of treatment (phase 3 LUNAR (10) and APOLLO (11) studies), and was associated with a significantly higher proportion of patients achieving an IOP reduction of ≥25% at all time points assessed (LUNAR and APOLLO). Open-label extensions of APOLLO and LUNAR (12) and a single-arm, open-label study of LBN in Japanese patients with OHT or OAG (JUPITER) (6) demonstrated sustained IOP-lowering effects and a safety profile consistent with that of PGAs over 1 year of treatment. LBN was initially approved in the United States (US) in November 2017 for the reduction of IOP in patients with OHT and/or OAG (5, 13).

This narrative review describes the unique mechanism of action of LBN and summarizes real-world data from postmarketing studies to gain insight into the potential effectiveness and tolerability of LBN in the clinical setting.

2 Mechanism of action

Aqueous humor is secreted by the ciliary processes and drains via 2 independent pathways: the trabecular meshwork/Schlemm’s canal (the conventional outflow pathway, which accounts for 70% to 90% of outflow) and the uveoscleral pathway (the unconventional outflow pathway; Figure 1) (1416). The balance between aqueous humor secretion and drainage determines IOP (14). Open-angle glaucoma is associated with increased resistance to aqueous drainage via the trabecular meshwork, whereas the iris typically obstructs access to the drainage pathways in angle-closure glaucoma (14). The resulting increase in IOP places mechanical stress and strain on the posterior structures of the eye, leading to optic nerve fiber dysfunction and death of retinal ganglion cells, followed by progressive visual field loss (14, 17).

Figure 1
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Figure 1. After being instilled into the eye, latanoprostene bunod (LBN) is rapidly metabolized by carboxyl ester hydrolysis into the prostaglandin F2α analog latanoprost acid (the active component of latanoprost) and butanediol mononitrate (6, 13, 16, 17). Subsequently, butanediol mononitrate is reduced to nitric oxide (NO) and an inactive metabolite, 1,4-butanediol. Binding of latanoprost acid to the F2α receptor leads to remodeling of the extracellular matrices in the ciliary body, increasing aqueous humor outflow through the uveoscleral (unconventional outflow) pathway (1822). NO causes relaxation of the trabecular meshwork and may also increase permeability of Schlemm’s canal, thus increasing aqueous humor outflow via the trabecular meshwork (conventional outflow pathway) (8, 17, 39, 40). Figure adapted with permission from Kawase K, et al. Adv Ther. 2016;33:1612-1627, under a CC BY-NC license; Weinreb RN, et al. US Ophthalmic Rev. 2016;9(2):80-87, under a CC BY-NC license; and Kaufman PL, et al. Cholinergics. In: Sears ML, ed. Pharmacology of the Eye: Handbook of Experimental Pharmacology. Berlin: Springer-Verlag; 1984, with kind permission of Springer Nature (6, 16, 41).

LBN reduces IOP through 2 distinct mechanisms by targeting both the trabecular and the uveoscleral outflow pathways (Figure 1). Metabolism of LBN following topical instillation results in the generation of 2 active compounds: latanoprost acid and NO (6, 13, 17). Latanoprost acid binds to and activates prostaglandin FP receptors in the ciliary muscle, leading over time to remodeling of the extracellular matrices in the ciliary body (1822). This remodeling enlarges interstitial spaces within the longitudinal ciliary muscle bundles and increases aqueous humor outflow through the uveoscleral pathway. The initial reduction in IOP from topical latanoprost acid may also be due to ciliary muscle relaxation (19, 21). Additionally, multiple studies show that prostaglandins, including latanoprost acid, increase aqueous humor outflow, in part, through the trabecular network (2125).

The second mechanism by which LBN lowers IOP is by targeting the trabecular meshwork with NO (Figure 1). Cells in Schlemm’s canal produce NO, which regulates IOP by remodeling the extracellular matrix within the trabecular meshwork, thus increasing aqueous humor outflow (17, 26, 27). The trabecular meshwork has contractile properties similar to those of smooth muscle (2631). Rho kinase activity and intracellular calcium signaling mediate trabecular meshwork contraction (27, 30, 32). In normal eyes, NO activates the soluble guanylate cyclase and cyclic guanosine monophosphate (cGMP) cascade, leading to inhibition of both Rho kinase activity and intracellular calcium signaling, thus resulting in relaxation of the trabecular meshwork (17, 27, 29, 30, 32, 33).

Deficient NO signaling is thought to contribute to chronic contraction and subsequent extracellular matrix remodeling of the trabecular meshwork and elevated IOP in glaucoma. The eyes of patients with OAG have decreased levels of NO markers compared with normal eyes, which is interpreted as reflecting a deficiency in NO signaling (3336). The NO released by LBN acts in the same way as endogenous NO, increasing aqueous humor outflow through the trabecular pathway and decreasing IOP (Figure 1) (6, 8, 16, 17, 33, 3741). Accumulating data suggest that NO released from LBN may also confer neuroprotective benefits via effects on optic nerve head blood flow and macular retinal blood vessel density (42, 43).

3 Real-world studies

A literature review identified 8 real-world studies of LBN, including 2 studies in newly diagnosed, treatment-naïve patients with OHT or OAG (44, 45), 4 studies of adjunctive therapy in patients with glaucoma receiving other IOP-lowering therapies (4649), and 2 studies in which patients with glaucoma switched to LBN monotherapy or adjunctive therapy (50, 51) (Table 1). With the exception of 1 study (50), all real-world studies were retrospective.

Table 1
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Table 1. Real-world studies of latanoprostene bunod 0.024%.

3.1 Initial therapy

A retrospective, multicenter medical chart review assessed the effects of LBN 0.024% in 65 adults with newly diagnosed OHT or OAG who had at least 2 follow-up visits (spanning ≥2 months) (44). Initiation of LBN therapy was associated with a mean (SD) reduction from baseline (RFB) of 7.1 (4.7) mm Hg at follow-up visit 1 (~1.4 months) and 7.3 (5.1) mm Hg at visit 2 (~4.7 months); 30.8% reductions and P<0.0001 were seen at both visits. Mean percent reductions in IOP of 37.1% and 40.9% were observed in patients with baseline IOP of >21 mm Hg at visits 1 and 2, respectively. At both visits, more than half of patients had achieved ≥30% RFB in IOP. The most common adverse events (AEs) were blurred vision, dryness, itching, irritation, and light sensitivity. No meaningful changes in visual acuity (VA) or cup-to-disk ratio (CDR) were reported.

Wang and colleagues (45) conducted a retrospective, multicenter study comparing LBN QD (n=94) with latanoprost 0.005% QD (n=104) and timolol 0.5% BID (n=115) in patients newly diagnosed with OHT or OAG and with IOP of ≥21 mm Hg. In all 3 treatment cohorts, baseline IOP was approximately 24 mm Hg and decreased significantly (P<0.0001) from baseline to 3 months (mean [SD]: LBN, 17.5 [1.9]; latanoprost, 19.5 [1.0]; timolol, 19.7 [1.1]). The RFB in IOP was significantly greater with LBN compared with latanoprost or timolol (both P<0.0001). Latanoprost and LBN were associated with a higher incidence of AEs (16% and 14%, respectively; most commonly eye irritation, conjunctival hyperemia, and eye pain) than timolol (6%). However, timolol, but not latanoprost or LBN, was associated with significantly reduced heart rate and blood pressure.

3.2 Adjunctive therapy

A retrospective, single-center study followed 56 patients (102 eyes) with mild-to-severe glaucoma inadequately controlled with medical therapy or prior laser or surgical treatments who initiated LBN as a replacement for a PGA or for a fixed-dose combination of latanoprost/netarsudil (46). Patients took a mean of 3 glaucoma medications prior to starting LBN and throughout a median follow-up period of 7.9 months in the study, although non-PGA agents were not specified. The mean (SD) IOP was 16.2 (4.3) mm Hg at the visit during which LBN was prescribed. The mean (SD) RFB in IOP was 2.1 (3.5) mm Hg at the first follow-up visit (mean, 38.7 days) and 2.5 (3.3) mm Hg at the last visit (mean, 236 days; both P<0.0001). Clinically meaningful reductions of ≥2, ≥3, and ≥4 mm Hg were observed in 60%, 46%, and 34% of eyes, respectively. Seven patients (12.5%) discontinued LBN because of inadequate IOP control. Eight patients (14.3%) reported AEs, including pain, itching, throbbing, and discomfort; 4 patients discontinued LBN because of these AEs.

A retrospective, single-center study in 33 patients (53 eyes) evaluated LBN as adjunctive therapy in patients with severe glaucoma refractory to ≥3 topical IOP-lowering agents (47). LBN was substituted for PGA in patients previously taking a PGA. Mean (SD) IOP was 19.9 (6.0) mm Hg at baseline and, following initiation of LBN therapy, decreased by 2.6 (6.6) mm Hg (9%) at 3 months (49 eyes), 3.6 (7.4) mm Hg (11%) at 6 months (35 eyes), and 5.8 (7.4) mm Hg (19%) at 12 months (28 eyes; all P<0.01). At 12 months, RFB was ≥20% in 57% of eyes, ≥30% in 39%, and ≥40% in 25%. Surgery was required to control IOP in 7 of 53 eyes (13%). In this study, LBN was well tolerated, and no patients discontinued treatment because of AEs.

A retrospective multicenter cohort study assessed the effectiveness of LBN and the rho-kinase inhibitor netarsudil 0.02% as an adjuvant therapy in patients with glaucoma receiving up to 4 topical agents (48). The study included patients who had undergone prior surgical glaucoma procedures. Initiation of adjunctive therapy or replacement of the previous PGA with LBN (n=41 patients/eyes; mean [SD] baseline IOP, 19.4 [5.7] mm Hg; mean treatment duration, 79.4 days) was associated with a mean (SD) RFB in IOP of 2.9 (3.7) mm Hg (13.6%; P<0.0001) (48). Of the 95 patients (95 eyes) that underwent adjunctive therapy with netarsudil 0.02%, the mean (SD) IOP was 20.3 (6.1) mm Hg at baseline and decreased by 3.9 (4.6) mm Hg (17.5%; P<0.0001), which was comparable to the IOP-lowering effect of LBN. Changes in IOP did not correlate significantly with the baseline number of IOP medications. Netarsudil was discontinued in 11 patients (11.6%) for lack of effectiveness and 3 patients (3.2%) because of erythema. LBN was discontinued in 7 patients (17.1%) for lack of effectiveness.

A retrospective, single-center cohort study compared LBN (substituted for a PGA; n=11 patients/eyes; mean time to follow-up, 59 days) with netarsudil (added to the regimen; n=24 patients/eyes; mean time to follow-up, 48 days) in patients with primary OAG taking combination therapy with an alpha-agonist, a beta-blocker, a carbonic anhydrase inhibitor, and a PGA (49). This study excluded patients with prior glaucoma surgery. Mean (SD) baseline IOP was significantly higher in the netarsudil cohort (20.9 [5.1] mm Hg) than the LBN cohort (17.8 [3.4] mm Hg; P=0.04). Compared to LBN-treated patients, those receiving netarsudil had a significantly greater mean (SD) RFB in IOP (4.0 [1.9] vs 0.4 [1.8] mm Hg; P=0.007) and were significantly more likely to achieve ≥10% RFB in IOP (71% vs 18%; P=0.009). No significant changes in VA occurred in either cohort.

3.3 Switching

Okeke and colleagues (51) evaluated the effectiveness and safety of switching (primarily due to inadequate IOP lowering) to LBN in a retrospective chart review of 49 adults with mild-to-moderate OHT or OAG previously using 1 to 2 topical IOP-lowering medications. After switching, 40 patients were taking LBN monotherapy and 9 were taking LBN plus 1 other IOP-lowering therapy. The mean (SD) IOP before switching was 21.9 (4.2) mm Hg. Overall, IOP decreased by a mean (SD) of 5.4 (3.3) mm Hg to the first follow-up visit (median, ~1 month) and by 5.2 (4.8) mm Hg at the second follow-up visit (median, ~4 months; both visits, ~25%, P<0.001). At visit 2, the proportion of patients with an RFB in IOP of ≥2, ≥3, ≥4, and ≥5 mm Hg was 85.0%, 75.0%, 67.5%, and 60.0%, respectively. The magnitude of IOP lowering in subgroups of patients based on pre-switch treatment consisting of a PGA (PGA with or without another IOP-lowering product or PGA monotherapy) were consistent with those of the overall study population. Six patients (12.2%) discontinued LBN because of inadequate IOP lowering. Nine patients (17.6%) reported 14 ocular AEs, with only floaters and eye dryness occurring in more than 1 patient. There were no discontinuations due to AEs. There were no significant changes in VA or CDR.

A prospective, single-center, nonrandomized, nonmasked case series evaluated the ocular surface tolerance of LBN 0.024% compared with latanoprost 0.005% in patients with chronic OAG (50). Patients (N=36) who were previously treated for 6 to 12 months with latanoprost 0.005% with no known intolerance switched to LBN after a 1-week washout and were monitored for 3 months. After patients switched to LBN, a statistically significant improvement was observed in ocular surface disease index (OSDI) score and fluorescein staining/Oxford scale (ocular surface damage; both P≤0.01), but not in break-up time or Schirmer test results. The percentage of patients with a normal OSDI score (<13) increased from 41.6% during latanoprost treatment to 72.2% at 3 months after starting LBN (30.6% increase). Both best-corrected VA and IOP (which was low and well controlled at baseline; mean, 13.4 mm Hg) remained stable.

4 Discussion

Results of real-world studies showed reduction in IOP after initiating LBN in newly diagnosed patients (44, 45), as adjunctive therapy in patients receiving other IOP-lowering therapies (4649), and after switching from IOP-lowering medications to LBN (51). The reductions in IOP observed in these studies were comparable to or higher than those observed in clinical trials (i.e., mean decrease of 3.9 mm Hg at 2 weeks, 3.1 mm Hg at 3 months, 2.1 mm Hg at 6 months, and 2.5 mm Hg at 12 months, based on a meta-analysis of pooled data from 9 trials (52)). Among studies reporting the percentages of patients with clinically meaningful reductions in IOP, rates of achieving RFB in IOP ≥2 mm Hg at the final visit ranged across 2 studies from 60% to 85% (46, 51), and rates of achieving RFB in IOP ≥20% at the final visit ranged across 2 studies from 57% to 78.5% (44, 47). Further, decreases in IOP were sustained over the course of the real-world studies, which ranged in mean duration from 3 to 4.7 months in studies of LBN as initial therapy (44, 45) and from 2 to 12 months in studies of LBN as adjunctive therapy (4649); mean/median duration in the switch studies ranged from 3 to ~4 months (50, 51). Results of a study in patients with newly diagnosed OHT/OAG that observed a significantly greater RFB in IOP with LBN than with latanoprost or timolol (45) are consistent with those of clinical trials in which LBN demonstrated superior efficacy compared with latanoprost (8) or timolol (8, 10) and a network meta-analysis comparing the efficacy of LBN to other IOP-lowering therapies (53).

A single study (by Bahr and colleagues) reported only a modest reduction of IOP with LBN as adjunctive therapy (0.4 mm Hg, 2%) and a significantly greater reduction with netarsudil (4.0 mm Hg, 17%) (49). However, interpretation of this finding is limited by the significant difference in baseline IOP (17.8 mm Hg with LBN; 20.9 mm Hg with netarsudil) and the small number of LBN-treated patients (n=11) (49). This baseline difference is particularly important because higher baseline IOP has been reported to be associated with greater IOP reduction following both medications and surgical interventions for glaucoma (54). In contrast to a study by Bahr and colleagues, another multicenter study (by Mehta and colleagues) reported the comparable IOP-lowering effect of LBN and netarsudil when they were used as an adjuvant therapy in patients with glaucoma receiving up to 4 topical agents (48). Further larger prospective studies with LBN and netarsudil as adjunctive therapy will need to be undertaken to compare effectiveness of these drugs in lowering IOP.

Rates of discontinuation of LBN due to inadequate IOP lowering ranged in studies reporting this statistic from 12.2% to 17.1% (46, 48, 51). LBN was well tolerated, with generally low rates of individual AEs. The most common AEs were consistent with the known safety profile of LBN (i.e., ocular AEs such as instillation pain, eye irritation, and dryness) (13). Meaningful changes in VA and CDR were not observed (44, 4951).

Interpretation of data from real-world studies examining the IOP-lowering effects of LBN is limited by several challenges inherent to real-world studies. These include lack of randomization, absence of placebo and/or active control groups, lack of masking, unknown treatment adherence rates, the possibility of inconsistent data collection leading to missing data, and associated bias in patient selection, data measurement/collection, and data assessment (44, 46, 55). Many of the studies included had small sample sizes, and all but one was retrospective in nature. Additionally, the requirement of ≥2 follow-up visits in some studies may have led to patient selection bias, as patients who discontinued LBN shortly after treatment initiation because of inadequate response or poor tolerability would have been excluded. Missing data from patients who discontinued LBN treatment because of inadequate response may have contributed to a higher RFB in IOP observed at later time points in some studies. Among studies in which patients were using multiple IOP-lowering medications, the specific combinations were generally not reported, which limits interpretation of the results. Short duration of most of the studies (6 of the 8) included may not have allowed evaluation of AEs related to PGA-associated periorbitopathy, which generally appear only after several months of treatment with PGA (56). Despite these limitations, data from real-world studies provide important insights regarding the potential effectiveness and tolerability of LBN in the clinical setting, especially considering the availability of only a single small clinical trial of LBN in treatment-naïve patients (9) and the lack of randomized clinical trials of adjunctive therapy with LBN and switching to LBN.

A prospective, single-center study demonstrated improvements in OSDI scores and fluorescein staining among 36 patients with chronic OAG who switched from latanoprost to LBN (50). The authors suggested that the observed improvement in ocular surface signs and symptoms after switching to LBN may, in part, be related to the ability of NO donors to promote secretion of proteins from acinar cells of the lacrimal gland (50, 57). Key limitations of this prospective switch study include its small sample size, short duration, and nonrandomized and open-label design (50).

4.1 Conclusions and future directions

LBN is a topical NO-donating PGA that offers significant IOP reduction by combining the complementary mechanisms of PGF2α and NO in a single formulation, enhancing both trabecular and uveoscleral outflow pathways. Data from real-world studies support that LBN is an important first-line agent that is well tolerated and can be used in conjunction with other glaucoma medications and surgical procedures. In addition to its potent IOP-lowering effects, NO may improve ocular blood flow and offer neuroprotective benefits, making LBN a valuable addition to glaucoma therapy.

Future research should evaluate the efficacy of LBN in diverse patient populations, particularly those with severe glaucoma or normal tension glaucoma with low presenting IOP. Studies involving these groups will help uncover the full therapeutic potential of LBN, particularly in complex and challenging cases. Additionally, a prospective, randomized comparative study between LBN and other PGAs in patients with OAG is warranted.

Despite the benefits of LBN, long-term use of glaucoma medications still presents challenges. Issues such as frequent dosing, ocular surface discomfort, and medication nonadherence remain barriers to effective treatment. Reducing the number of medications and minimizing AEs are key factors in improving patient adherence. LBN’s dual-action mechanism makes it a suitable candidate for combination therapy with aqueous suppressants. These combinations could integrate all 3 major pathways for reducing IOP—trabecular outflow, uveoscleral outflow, and aqueous production—into a single medication, a capability not seen in currently available fixed-combination therapies.

Sustained-release drug delivery systems have the potential to transform glaucoma management by maintaining consistent drug release and reducing fluctuations in IOP. This technology could reduce the burden of daily eye drops, improve treatment compliance, and provide more stable long-term control of IOP. The use of novel, slow-release NO donors and effective delivery platforms (e.g., use of nanoparticles) in treating ocular diseases is also being investigated for effective delivery of NO to the target region (58). Current FDA-approved PGA implants, which target uveoscleral outflow pathway, have already demonstrated the promise of sustained-release treatments (5961). If LBN were developed in an implantable form, it could address multiple IOP-lowering pathways and potentially enhance treatment outcomes. Future research exploring fixed combination and sustained-release formulations of LBN could pave the way for more comprehensive and patient-friendly treatment strategies for glaucoma management.

Author contributions

WDS: Conceptualization, Writing – review & editing. TC: Conceptualization, Writing – review & editing. DL: Conceptualization, Writing – review & editing. TW: Conceptualization, Writing – review & editing. PR: Conceptualization, Writing – review & editing. NR: Conceptualization, Writing – review & editing. YJ: Conceptualization, Writing – review & editing. MM: Conceptualization, Writing – review & editing. MF: Conceptualization, Writing – review & editing. NC: Conceptualization, Writing – review & editing. JS: Conceptualization, Writing – review & editing. IG: Conceptualization, Writing – review & editing. ÖU: Conceptualization, Writing – review & editing. WSS: Conceptualization, Writing – review & editing. CH: Conceptualization, Writing – review & editing.

Funding

The author(s) declare that financial support was received for the research and/or publication of this article. Editorial and medical writing assistance was provided under the direction of the authors by Adrienne Drinkwater, PhD, and Pratibha Hebbar, PhD, Synchrony Medical Communications, LLC, West Chester, PA, and funded by Bausch + Lomb. Funding for research on effects of nitric oxide on intraocular pressure homeostasis was provided through NIH grant EY022359 (WDS).

Conflict of interest

WDS reports serving as a consultant for AbbVie, Diorasis, Exhaura, Lymphax, and Medicxi; serving on scientific advisory boards for Humonix/Glauconix, Qlaris Bio, and Starlight Bio; and having research contracts with AbbVie and Ollin Biosciences. PR reports receiving grant support from Program Management Unit for Competitiveness and Siam Pharmaceuticals; serving on the speakers bureau for or receiving lecture fees from Alcon Laboratories, Bausch + Lomb, Glaukos, Hoya, Johnson & Johnson, Kowa, and Santen. MM reports receiving grant support from AbbVie, Aerie Pharmaceuticals, Alcon Laboratories, Allergan, Bausch + Lomb, Glaukos, InnFocus, Iridex, New World Medical, Nicox, Santen, and Thea; serving as a consultant or advisor to AbbVie, Aerie Pharmaceuticals, Alcon Laboratories, Allergan, ArcScan, Regeneron, Santen, Thea, and W. L. Gore & Associates; and serving on the speakers bureau for or receiving lecture fees from AbbVie, Aerie Pharmaceuticals, Alcon Laboratories, Alcon Pharmaceuticals, Allergan, Bausch + Lomb, Iridex, and MedEdicus. MF reports serving as a consultant to AbbVie, Alcon, Carl Zeiss Meditec, Glaukos, and Topcon. NC reports serving as a speaker and consultant for AbbVie, Alcon, Bausch + Lomb, Glaukos, and Sight Sciences. JS reports serving a consultant for Alcon, Allergan, an AbbVie company, Astellas, Balance Ophthalmics, Bausch + Lomb, Carl Zeiss Meditec, Eyenovia, Glaukos, iCare, Opus Genetics, Radius XR, Thea Pharma, and Viatris; and serving on the speakers bureau for or receiving lecture fees from Alcon, Allergan, an AbbVie company, Astellas, Bausch + Lomb, Carl Zeiss Meditec, and Viatris. IG reports serving as a consultant to AbbVie, Alcon, Bausch + Lomb, Glaukos, MediPrint, and Tarsus. CH reports serving as a consultant to Bausch + Lomb, Citrus Therapeutics, Ivantis, Labtician, PharmDrug, Thea, Valeo, and Viatris; and serving on the speakers bureau for Aequus, Allergan, an AbbVie company, Bausch + Lomb, Labtician, Thea, Valeo, and Viatris.

The remaining 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.

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Keywords: glaucoma, open-angle, intraocular pressure, nitric oxide donors, ocular hypertension, prostaglandin analog

Citation: Stamer WD, Chiu T, Lu D-W, Wang TH, Rojanapongpun P, Ruangvaravate N, Jo YH, Moster MR, Fingeret M, Cothran NL, Steen J, Gaddie IB, Uçakhan-Gündüz Ö, Shamseldin Shalaby W and Hutnik CML (2025) Real-world impact of latanoprostene bunod ophthalmic solution 0.024% in glaucoma therapy: a narrative review. Front. Ophthalmol. 5:1554777. doi: 10.3389/fopht.2025.1554777

Received: 02 January 2025; Accepted: 03 March 2025;
Published: 28 March 2025.

Edited by:

Kate Keller, Oregon Health and Science University, United States

Reviewed by:

Elizabeth Cretara, University of New Mexico, United States
Anh H. Pham, University of Miami Health System, United States

Copyright © 2025 Stamer, Chiu, Lu, Wang, Rojanapongpun, Ruangvaravate, Jo, Moster, Fingeret, Cothran, Steen, Gaddie, Uçakhan-Gündüz, Shamseldin Shalaby and Hutnik. 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: Cindy M. L. Hutnik, Y2luZHkuaHV0bmlrQHNqaGMubG9uZG9uLm9uLmNh

Disclaimer: 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.

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