This article is a correction to:
Escape of TLR5 Recognition by Leptospira spp.: A Rationale for Atypical Endoflagella
Marion Holzapfel1,2,3†
Delphine Bonhomme1,2,3,4†
Julie Cagliero5
Frédérique Vernel-Pauillac1,2,3Martine Fanton d’Andon1,2,3Sophia Bortolussi1,2,3
Laurence Fiette6‡
Cyrille Goarant7
Elsio A. Wunder Jr.8,9
Mathieu Picardeau10
Albert I. Ko8,9
Dirk Werling11
Mariko Matsui5
Ivo G. Boneca1,2,3
Catherine Werts1,2,3*- 1Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France
- 2CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France
- 3Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
- 4Sorbonne Paris Cité, Université de Paris, Paris, France
- 5Institut Pasteur de Nouvelle Calédonie, Immunity and Inflammation Group, Institut Pasteur International Network, Noumea, France
- 6Unité Histopathologie Humaine et Modèles Animaux, Institut Pasteur, Paris, France
- 7Leptospirosis Research and Expertise Unit, Institut Pasteur International Network, Institut Pasteur de Nouvelle Calédonie, Noumea, France
- 8Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Brazil
- 9Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, United States
- 10Unité Biologie des Spirochètes, Institut Pasteur, Paris, France
- 11Department of Pathobiology and Population Sciences, Royal Veterinary College, Hatfield, United Kingdom
A Corrigendum on
Escape of TLR5 Recognition by Leptospira spp.: A Rationale for Atypical Endoflagella
By Holzapfel M, Bonhomme D, Cagliero J, Vernel-Pauillac F, Fanton d’Andon M, Bortolussi S, Fiette L, Goarant C, Wunder Jr EA, Picardeau M, Ko AI, Werling D, Matsui M, Boneca IG and Werts C (2020) 11:2007. doi: 10.3389/fimmu.2020.02007
In the original article, there was a mistake in Figure 8A, as published. We showed that we did not get expression of the FLaB1 subunit in Manilae L495 strain. In fact, the forward primer (designed according to the Fiocruz sequence) used to amplify the FlaB1 subunit has two mismatches within the Manilae sequence. We did the RT-PCR with the good primer and found an amplification, showing an enhanced expression at the stationary phase compared to the exponential phase, likewise the other FlaB subunits. The corrected Figure 8 appears below.
A correction has been made to Results, “FlaB mRNA Are Upregulated in Stationary Phase”.
“Of note, and different from other strains, the Manilae L495 flaB1 mRNA was undetectable” and a paragraph in the Discussion, “Furthermore, in Manilae L495…” are not accurate and should be both omitted.
In the original article, there was also mistake in Figure 6, Supplementary Figure 3, Supplementary Figure 4 and Supplementary Figure 6 and their legends as published. We realized a “slipping” of the names of FlaB subunits only in the figures of alignments and comparison of sequences (Figure 6, Sup Figure 3, Sup Figure 4 and Sup Figure 6). What we called FlaB1 in figures and respective legends is in fact FlaB4, FlaB2 is FlaB1, FlaB3 is FlaB2, and FlaB4 is FlaB3 (see corrected annotation in Additional table provided).
FIGURE 6
Figure 6 (A) Amino acid sequence homology average percentage between Salmonella typhimurium FliC (P06179) and Leptospira interrogans strain Fiocruz FlaB (LIC11890, LIC11889, LIC 11532 and LIC11531) and FlaAs (LIC10788 and LIC10787) and primary structures of the flagellin proteins with TLR5 binding consensus. (B) In silico (Phyre2 and Chimera softwares) prediction of Salmonella typhimurium FliC (P06179) structure with the four described domains and with positions of the TLR5 binding consensus: 1 (red), 2 (yellow) and 3 (light blue) and stabilization region (light green) highlighted. (C) In silico (Phyre2 and Chimera softwares) prediction of Leptospira interrogans strain Fiocruz FlaB4 (LICI1531) with the positions of the TLRS binding consensus and stabilization region highlighted, FlaA1 (LIC10788), FlaA2 (LICI0787). (D) Clustal (MEGA software) alignment of the amino acid sequences for the TLR5 binding consensus regions of: Salmonella enterica FliC (GeneBank QDQ31983.1), L. bifleva (strain Patoc) FlaB1 (LEPBla2133), FlaB2 (LEPBIa2132), FlaB3 (LEPBla1872) and FlaB4 (LEPBla1589), L. interrogans (strain Fiocruz L1-130) FlaB1 (LIC18890), FlaB2 (LICIT889), FlaB3 (LICI1532) and FlaB4 (LIC11531), L. interrogans (strain L495) FlaB1 (LMANv2 260016), FlaB2 (LMANv2 260015). FlaB3 (LMANv2 590024) and FlaB4 (LMANv2 590023), and L. interrogans (strain Verdun) FlaB1 (AKWP_v1_110429), FlaB2 (AKWP_v1_110428) and FlaB3 (AKWP_v1_110068) and FlaB4 (AKWP_v1_110067).
Additional Table Old annotations (published Frontiers Immunol 2020).
New annotations consistent with studies from M Picardeau.
However, the annotations used in Figures 7, 8 were correct and all the mutants used are correct. The corrected Figure 6 and its corrected legend appears below. The corrected Supplementary Figures 3, 4, and 6 can be accessed from the original article.
FIGURE 8
Figure 8 (A) In vitro FlaBs mRNA expression in L. interrogans Copenhageni Fiocruz L1-130, Icterohaemorrhagiae Verdun and Manilae L495 at the exponential (E) and stationary (S) phase. Data of RT-qPCR are expressed as the relative mRNA quantities normalized to the expression of the lipl41 mRNA. Technical replicates are represented as dots and lines correspond to mean (+/- SD) of replicates (3 < n < 9). Statistically significant differences (Student t-test) are indicated. (B) In vivo FlaAs and (C) FlaBs mRNA expression in blood of infected mice (n=5, light blue) and hamsters (n-5, dark blue), 24 h post intraperitoneal infection with 2x108 virulent L. interrogans Icterohaemorrhagiae strain Verdun, compared with mRNA expression in culture in EMJH at 30° C. Data of RT-gPCR are expressed as the ratio of mRNA quantities relatives to the EMJH control. Individual animals are represented as dots and lines correspond to mean (+/- SD) of all animals. Statistically significant differences (Student t-test) are indicated with corresponding p values: * for p < 0.05; ** for p < 0.01 and *** for p < 0.001.
The authors apologize for these errors and state that they do not change the scientific conclusions of the article in any way. The original article has been updated.
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Keywords: Leptospira, toll-like receptor, innate immunity, Flagelin genes, TLR5, mouse model
Citation: Holzapfel M, Bonhomme D, Cagliero J, Vernel-Pauillac F, d’Andon MF, Bortolussi S, Fiette L, Goarant C, Wunder EA Jr., Picardeau M, Ko AI, Werling D, Matsui M, Boneca IG and Werts C (2022) Corrigendum: Escape of TLR5 recognition by Leptospira spp.: A rationale for atypical endoflagella. Front. Immunol. 13:932151. doi: 10.3389/fimmu.2022.932151
Received: 29 April 2022; Accepted: 25 May 2022;
Published: 08 November 2022.
Edited and Reviewed by:
Melissa Jo Caimano, University of Connecticut Health Center, United StatesCopyright © 2022 Holzapfel, Bonhomme, Cagliero, Vernel-Pauillac, d’Andon, Bortolussi, Fiette, Goarant, Wunder, Picardeau, Ko, Werling, Matsui, Boneca and Werts. 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: Catherine Werts, Y3dlcnRzQHBhc3RldXIuZnI=
†These authors share first authorship
‡Present address: Laurence Fiette, IMMR, Paris, France