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Sereme Y, Schrimp C, Faury H, Agapoff M, Lefebvre-Wloszczowski E, Chang Marchand Y, Ageron-Ardila E, Panafieu E, Blec F, Coureuil M, Frapy E, Tsatsaris V, Bonacorsi S, Skurnik D. A live attenuated vaccine to prevent severe neonatal Escherichia coli K1 infections. Nat Commun 2024; 15:3021. [PMID: 38589401 PMCID: PMC11001983 DOI: 10.1038/s41467-024-46775-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 03/11/2024] [Indexed: 04/10/2024] Open
Abstract
Preterm birth is currently the leading cause of neonatal morbidity and mortality. Genetic, immunological and infectious causes are suspected. Preterm infants have a higher risk of severe bacterial neonatal infections, most of which are caused by Escherichia coli an in particular E. coli K1strains. Women with history of preterm delivery have a high risk of recurrence and therefore constitute a target population for the development of vaccine against E. coli neonatal infections. Here, we characterize the immunological, microbiological and protective properties of a live attenuated vaccine candidate in adult female mice and their pups against after a challenge by K1 and non-K1 strains of E. coli. Our results show that the E. coli K1 E11 ∆aroA vaccine induces strong immunity, driven by polyclonal bactericidal antibodies. In our model of meningitis, mothers immunized prior to mating transfer maternal antibodies to pups, which protect newborn mice against various K1 and non-K1 strains of E. coli. Given the very high mortality rate and the neurological sequalae associated with neonatal E. coli K1 meningitis, our results constitute preclinical proof of concept for the development of a live attenuated vaccine against severe E. coli infections in women at risk of preterm delivery.
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Affiliation(s)
- Youssouf Sereme
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France
| | - Cécile Schrimp
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France
| | - Helène Faury
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France
- Department of Microbiology, Necker Hospital, University de Paris, Paris, France
| | - Maeva Agapoff
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France
| | | | | | | | - Emilie Panafieu
- LEAT antenne Imagine- SFR Necker INSERM US 24, Paris, France
| | - Frank Blec
- LEAT antenne Imagine- SFR Necker INSERM US 24, Paris, France
| | - Mathieu Coureuil
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France
| | - Eric Frapy
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France
| | - Vassilis Tsatsaris
- Maternité Port-Royal, hôpital Cochin, GHU Centre Paris cité, AP-HP, Paris, France
- FHU PREMA, Maternité Port-Royal, Paris, France
| | - Stephane Bonacorsi
- IAME, UMR 1137, INSERM, Université Paris Cité, Paris, France
- Laboratoire de Microbiologie, Hôpital Robert Debré, AP-HP, Paris, France
| | - David Skurnik
- Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades, Paris, France.
- Department of Microbiology, Necker Hospital, University de Paris, Paris, France.
- FHU PREMA, Maternité Port-Royal, Paris, France.
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2
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Sinclair P, Kabbani N. Ionotropic and metabotropic responses by alpha 7 nicotinic acetylcholine receptors. Pharmacol Res 2023; 197:106975. [PMID: 38032294 DOI: 10.1016/j.phrs.2023.106975] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/12/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023]
Abstract
Nicotinic acetylcholine receptors (nAChRs) belong to a superfamily of cys-loop receptors characterized by the assembly of five subunits into a multi-protein channel complex. Ligand binding to nAChRs activates rapid allosteric transitions of the receptor leading to channel opening and ion flux in neuronal and non-neuronal cell. Thus, while ionotropic properties of nAChRs are well recognized, less is known about ligand-mediated intracellular metabotropic signaling responses. Studies in neural and non-neural cells confirm ionotropic and metabotropic channel responses following ligand binding. In this review we summarize evidence on the existence of ionotropic and metabotropic signaling responses by homopentameric α7 nAChRs in various cell types. We explore how coordinated calcium entry through the ion channel and calcium release from nearby stores gives rise to signaling important for the modulation of cytoskeletal motility and cell growth. Amino acid residues for intracellular protein binding within the α7 nAChR support engagement in metabotropic responses including signaling through heterotrimeric G proteins in neural and immune cells. Understanding the dual properties of ionotropic and metabotropic nAChR responses is essential in advancing drug development for the treatment of various human disease.
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Affiliation(s)
| | - Nadine Kabbani
- Interdisciplinary Program in Neuroscience, Fairfax, VA, USA; School of Systems Biology, George Mason University, Fairfax, VA, USA.
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3
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He X, Wang L, Liu L, Gao J, Long B, Chi F, Hu T, Wan Y, Gong Z, Li L, Zhen P, Zhang T, Cao H, Huang SH. Endogenous α7 nAChR Agonist SLURP1 Facilitates Escherichia coli K1 Crossing the Blood-Brain Barrier. Front Immunol 2021; 12:745854. [PMID: 34721415 PMCID: PMC8552013 DOI: 10.3389/fimmu.2021.745854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/13/2021] [Indexed: 12/11/2022] Open
Abstract
Alpha 7 nicotinic acetylcholine receptor (α7 nAChR) is critical for the pathogenesis of Escherichia coli (E. coli) K1 meningitis, a severe central nervous system infection of the neonates. However, little is known about how E. coli K1 manipulates α7 nAChR signaling. Here, through employing immortalized cell lines, animal models, and human transcriptional analysis, we showed that E. coli K1 infection triggers releasing of secreted Ly6/Plaur domain containing 1 (SLURP1), an endogenous α7 nAChR ligand. Exogenous supplement of SLURP1, combined with SLURP1 knockdown or overexpression cell lines, showed that SLURP1 is required for E. coli K1 invasion and neutrophils migrating across the blood-brain barrier (BBB). Furthermore, we found that SLURP1 is required for E. coli K1-induced α7 nAChR activation. Finally, the promoting effects of SLURP1 on the pathogenesis of E. coli K1 meningitis was significantly abolished in the α7 nAChR knockout mice. These results reveal that E. coli K1 exploits SLURP1 to activate α7 nAChR and facilitate its pathogenesis, and blocking SLURP1-α7 nAChR interaction might represent a novel therapeutic strategy for E. coli K1 meningitis.
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Affiliation(s)
- Xiaolong He
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China.,Department of Infectious Disease, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-Sen University, Jiangmen, China
| | - Lei Wang
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Liqun Liu
- Saban Research Institute, University of Southern California, Children's Hospital Los Angeles, Los Angeles, CA, United States.,Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jie Gao
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China.,Department of Infectious Disease, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-Sen University, Jiangmen, China
| | - Beiguo Long
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Feng Chi
- Saban Research Institute, University of Southern California, Children's Hospital Los Angeles, Los Angeles, CA, United States
| | - Tongtong Hu
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yu Wan
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Zelong Gong
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Li Li
- Saban Research Institute, University of Southern California, Children's Hospital Los Angeles, Los Angeles, CA, United States.,Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming, China
| | - Peilin Zhen
- Department of Infectious Disease, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-Sen University, Jiangmen, China
| | - Tiesong Zhang
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming, China
| | - Hong Cao
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Sheng-He Huang
- Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China.,Saban Research Institute, University of Southern California, Children's Hospital Los Angeles, Los Angeles, CA, United States.,Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming, China
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4
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Wu C, Yang M, Liu R, Hu H, Ji L, Zhang X, Huang S, Wang L. Nicotine Reduces Human Brain Microvascular Endothelial Cell Response to Escherichia coli K1 Infection by Inhibiting Autophagy. Front Cell Infect Microbiol 2020; 10:484. [PMID: 33042863 PMCID: PMC7522313 DOI: 10.3389/fcimb.2020.00484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 08/04/2020] [Indexed: 01/22/2023] Open
Abstract
Studies have shown that exposure to environmental tobacco smoke can increase the risk of bacterial meningitis, and nicotine is the core component of environmental tobacco smoke. Autophagy is an important way for host cells to eliminate invasive pathogens and resist infection. Escherichia coli K1 strain (E. coli K1) is the most common Gram-negative bacterial pathogen that causes neonatal meningitis. The mechanism of nicotine promoting E. coli K1 to invade human brain microvascular endothelial cells (HBMECs), the main component of the blood–brain barrier, is not clear yet. Our study found that the increase of HBMEC autophagy level during E. coli K1 infection could decrease the survival of intracellular bacteria, while nicotine exposure could inhibit the HBMEC autophagic response of E. coli K1 infection by activating the NF-kappa B and PI3K/Akt/mTOR pathway. We concluded that nicotine could inhibit HBMEC autophagy upon E. coli K1 infection and decrease the scavenging effect on E. coli K1, thus promoting the occurrence and development of neonatal meningitis.
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Affiliation(s)
- Chao Wu
- Department of Histology and Embryology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Mengzhen Yang
- Department of Histology and Embryology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Rui Liu
- Department of Histology and Embryology, School of Basic Medical Sciences, Wuhan University, Wuhan, China.,Department of Human Anatomy, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China
| | - Hanyang Hu
- Department of Histology and Embryology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Lulu Ji
- Department of Histology and Embryology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Xiaoli Zhang
- Department of Ultrasound Imaging, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Shenghe Huang
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming, China.,Department of Pediatrics, Children's Hospital Los Angeles, University of Southern California, Los Angeles, CA, United States
| | - Lin Wang
- Department of Histology and Embryology, School of Basic Medical Sciences, Wuhan University, Wuhan, China.,Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
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5
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Hu T, Gong Z, Wan Y, Li Y, Gao X, Lun J, Huang S, Cao H. [Establishment of a gp120 transgenic mouse model with α7 nAChR knockout]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:1184-1191. [PMID: 32895175 DOI: 10.12122/j.issn.1673-4254.2020.08.17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To construct a HIV-1 gp120 transgenic mouse model (gp120+) with α7 nicotinic acetylcholine receptor (α7nAChR) gene knockout. METHODS The α7nAChR gene knockout mice (α7R-/-) were crossed with HIV-1gp120 transgenic mice (gp120+) to generate F1 generation mice. We selected the F1 mice with the genotype of α7R+/-/gp120+ to mate to obtain the F2 mice. The genotypes of the F3 mice were identified by PCR, and the protein expressions in the double transgenic animal model was analyzed by immunohistochemistry. BV2 cells were treated with gp120 protein and α7nAChR inhibitor, and the expressions of IL-1β and TNF-α were detected using ELISA. RESULTS The results of PCR showed the bands of the expected size in F3 mice. Two F3 mice with successful double gene editing (α7R-/-/gp120+) were obtained, and immunohistochemistry showed that the brain tissue of the mice did not express α7 nAChR but with high gp120 protein expression. In the in vitro cell experiment, treatment with gp120 promoted the secretion of IL-1β and TNF-α in BV2 cells, while inhibition of α7nAChR significantly decreased the expression of IL-1β and TNF-α (P < 0.001). CONCLUSIONS By mating gp120 Tg mice with α7R-/- mice, we obtained gp120 transgenic mice with α7nAChR gene deletion, which serve as a new animal model for exploring the role of α7nAChR in gp120-induced neurotoxicity.
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Affiliation(s)
- Tongtong Hu
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
| | - Zelong Gong
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
| | - Yu Wan
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
| | - Yubin Li
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
| | - Xuefeng Gao
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
| | - Jingxian Lun
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
| | - Shenghe Huang
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China.,Los Angeles Children's Hospital, University of Southern California, Los Angeles, 90027, USA
| | - Hong Cao
- Department of Microbiology, School of Public Health, Southern Medical University/Guangdong Key Laboratory of Tropical Diseases, Guangzhou 510515, China
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6
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Niu Z, Chen YH, Zhang K. Polymorphonuclear Leukocyte Transendothelial Migration Proceeds at Blood-Brain Barrier in Neonatal Meningitis. Front Microbiol 2020; 11:969. [PMID: 32528436 PMCID: PMC7264371 DOI: 10.3389/fmicb.2020.00969] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 04/22/2020] [Indexed: 11/29/2022] Open
Abstract
Neonatal bacterial meningitis remains a life-threatening and causative sequelae disease in newborns, despite the effective usage of antibiotics and improved critical medical care. Polymorphonuclear leukocyte (PMN) transendothelial migration across the blood-brain barrier, one of the three hallmarks of bacterial meningitis, now is considered as a “double-edge sword”. When participating in host immune system defending against virulent pathogens, it results in tissue inflammation and following severe damage of central nervous system at the same time, which contributes to a disastrous consequence. Recently, several researches have focused on this multi-step process and the mechanism of how the virulent factors of different pathogens influence PMN migration. The great progression they made has enlightened a new research hotspot and a novel therapeutic strategy. This mini review outlines the determinants and progression of PMN transmigration in neonatal meningitis caused by different predominant pathogens.
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Affiliation(s)
- Zhuo Niu
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, China.,Department of Surgical Oncology and General Surgery, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yu-Hua Chen
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, China
| | - Ke Zhang
- Department of Developmental Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, China
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7
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Le Guennec L, Coureuil M, Nassif X, Bourdoulous S. Strategies used by bacterial pathogens to cross the blood-brain barrier. Cell Microbiol 2019; 22:e13132. [PMID: 31658405 DOI: 10.1111/cmi.13132] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/11/2019] [Accepted: 10/13/2019] [Indexed: 12/15/2022]
Abstract
The skull, spine, meninges, and cellular barriers at the blood-brain and the blood-cerebrospinal fluid interfaces well protect the brain and meningeal spaces against microbial invasion. However, once in the bloodstream, a range of pathogenic bacteria is able to reach the brain and cause meningitis. Despite advances in antibacterial therapy, bacterial meningitis remains one of the most important infectious diseases worldwide. The most common causative bacteria in children and adults are Streptococcus pneumoniae and Neisseria meningitidis associated with high morbidity and mortality, while among neonates, most cases of bacterial meningitis are due to group B Streptococcus and Escherichia coli. Here we summarise our current knowledge on the strategies used by these bacterial pathogens to survive in the bloodstream, to colonise the brain vasculature and to cross the blood-brain barrier.
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Affiliation(s)
- Loic Le Guennec
- Inserm (Institut National de la Sante et de la Recherche Medicale), U1016, Institut Cochin, Paris, France.,CNRS (Centre National de la recherche Scientifique), UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Mathieu Coureuil
- Inserm (Institut National de la Sante et de la Recherche Medicale), unité U1151, Institut-Necker-Enfants-Malades, Paris, France.,CNRS (Centre National de la recherche Scientifique), UMR 8253, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Faculté de médecine, Paris, France
| | - Xavier Nassif
- Inserm (Institut National de la Sante et de la Recherche Medicale), unité U1151, Institut-Necker-Enfants-Malades, Paris, France.,CNRS (Centre National de la recherche Scientifique), UMR 8253, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Faculté de médecine, Paris, France.,Assistance Publique - Hôpitaux de Paris, Hôpital Necker Enfants Malades, Paris, France
| | - Sandrine Bourdoulous
- Inserm (Institut National de la Sante et de la Recherche Medicale), U1016, Institut Cochin, Paris, France.,CNRS (Centre National de la recherche Scientifique), UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
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