1
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Hsu SH, Yang HY, Chang CC, Tsai SK, Li C, Chang MY, Ko YC, Chou LF, Tsai CY, Tian YC, Yang CW. Blocking pathogenic Leptospira invasion with aptamer molecules targeting outer membrane LipL32 protein. Microbes Infect 2024; 26:105299. [PMID: 38224944 DOI: 10.1016/j.micinf.2024.105299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 11/27/2023] [Accepted: 01/08/2024] [Indexed: 01/17/2024]
Abstract
This study aimed to develop aptamers targeting LipL32, a most abundant lipoprotein in pathogenic Leptospira, to hinder bacterial invasion. The objectives were to identify high-affinity aptamers through SELEX and evaluate their specificity and inhibitory effects. SELEX was employed to generate LipL32 aptamers (L32APs) over 15 rounds of selection. L32APs' binding affinity and specificity for pathogenic Leptospira were assessed. Their ability to inhibit LipL32-ECM interaction and Leptospira invasion was investigated. Animal studies were conducted to evaluate the impact of L32AP treatment on survival rates, Leptospira colonization, and kidney damage. Three L32APs with strong binding affinity were identified. They selectively detected pathogenic Leptospira, sparing non-pathogenic strains. L32APs inhibited LipL32-ECM interaction and Leptospira invasion. In animal studies, L32AP administration significantly improved survival rates, reduced Leptospira colonies, and mitigated kidney damage compared to infection alone. This pioneering research developed functional aptamers targeting pathogenic Leptospira. The identified L32APs exhibited high affinity, pathogen selectivity, and inhibition of invasion and ECM interaction. L32AP treatment showed promising results, enhancing survival rates and reducing Leptospira colonization and kidney damage. These findings demonstrate the potential of aptamers to impede pathogenic Leptospira invasion and aid in recovery from Leptospira-induced kidney injury (190 words).
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Affiliation(s)
- Shen-Hsing Hsu
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan, Taiwan.
| | - Huang-Yu Yang
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chia-Chen Chang
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan, Taiwan
| | | | - Chien Li
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ming-Yang Chang
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yi-Ching Ko
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Li-Fang Chou
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chung-Ying Tsai
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ya-Chung Tian
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chih-Wei Yang
- Kidney Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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2
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Ulasi II, Burdmann EA, Ijoma CK, Chou LF, Yang CW. Neglected and Emerging Infections of The Kidney. Semin Nephrol 2023; 43:151472. [PMID: 38216373 DOI: 10.1016/j.semnephrol.2023.151472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
Individuals, societies, and the environment are affected by neglected and emerging diseases. These diseases result in a variety of severe outcomes, including permanent disabilities, chronic diseases such as chronic kidney disease, and even mortality. Consequences include high health care expenditures, loss of means of support, social stigma, and social exclusion. The burden of these diseases is exacerbated in low- and middle-income countries owing to poverty, inadequate fundamental infrastructure, and the absence of health and social protection systems. The World Health Organization is committed to promoting the following public health strategies to prevent and control neglected tropical diseases: preventive chemotherapy; intensive case management; vector control; provision of safe drinkable water, sanitation, and hygiene; and veterinary public health. In addition, it promotes a One Health strategy, which is a collaborative, multisectoral, and interdisciplinary approach to achieving the greatest health outcomes by recognizing the interdependence of human beings, animals, plants, and their shared environment. This article provides knowledge and strategies for the prevention and treatment of neglected and emerging diseases, with a particular concentration on kidney diseases, as part of a comprehensive approach to One Health.
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Affiliation(s)
- Ifeoma I Ulasi
- Renal Unit, Department of Medicine, College of Medicine, University of Nigeria-University of Nigeria Teaching Hospital, Ituku-Ozalla, Enugu, Nigeria; Renal Unit, Department of Internal Medicine, Alex Ekwueme Federal University Teaching Hospital, Abakaliki, Nigeria
| | - Emmanuel A Burdmann
- Laboratório de Investigação Médica (LIM 12), Faculdade de Medicina da Universidade de So Paulo, So Paulo, Brazil
| | - Chinwuba K Ijoma
- Renal Unit, Department of Medicine, College of Medicine, University of Nigeria-University of Nigeria Teaching Hospital, Ituku-Ozalla, Enugu, Nigeria
| | - Li-Fang Chou
- Kidney Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chih-Wei Yang
- Kidney Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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3
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Chou LF, Yang HY, Hung CC, Tian YC, Hsu SH, Yang CW. Leptospirosis kidney disease: Evolution from acute to chronic kidney disease. Biomed J 2023; 46:100595. [PMID: 37142093 PMCID: PMC10345244 DOI: 10.1016/j.bj.2023.100595] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 04/17/2023] [Accepted: 04/26/2023] [Indexed: 05/06/2023] Open
Abstract
Leptospirosis is a neglected bacterial disease caused by leptospiral infection that carries a substantial mortality risk in severe cases. Research has shown that acute, chronic, and asymptomatic leptospiral infections are closely linked to acute and chronic kidney disease (CKD) and renal fibrosis. Leptospires affect renal function by infiltrating kidney cells via the renal tubules and interstitium and surviving in the kidney by circumventing the immune system. The most well-known pathogenic molecular mechanism of renal tubular damage caused by leptospiral infection is the direct binding of the bacterial outer membrane protein LipL32 to toll-like receptor-2 expressed in renal tubular epithelial cells (TECs) to induce intracellular inflammatory signaling pathways. These pathways include the production of tumor necrosis factor (TNF)-α and nuclear factor kappa activation, resulting in acute and chronic leptospirosis-related kidney injury. Few studies have investigated the relationship between acute and chronic renal diseases and leptospirosis and further evidence is necessary. In this review, we intend to discuss the roles of acute kidney injury (AKI) to/on CKD in leptospirosis. This study reviews the molecular pathways underlying the pathogenesis of leptospirosis kidney disease, which will assist in concentrating on potential future research directions.
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Affiliation(s)
- Li-Fang Chou
- Kidney Research Center, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; Graduate Institute of Biomedical Sciences, Department of Microbiology and Immunology, Department of Biochemistry, Chang Gung University, Taoyuan, Taiwan
| | - Huang-Yu Yang
- Kidney Research Center, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Chieh Hung
- Kidney Research Center, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ya-Chung Tian
- Kidney Research Center, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shen-Hsing Hsu
- Kidney Research Center, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan
| | - Chih-Wei Yang
- Kidney Research Center, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital at Linkou, Linkou, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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4
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Chen KH, Chou LF, Hung CC, Tang HY, Cheng ML, Yang HY, Hsu HH, Tian YC, Yang CW. Integrated Metabolomic and Transcriptomic Analysis of Acute Kidney Injury Caused by Leptospira Infection. Pathogens 2022; 11:pathogens11070764. [PMID: 35890009 PMCID: PMC9316537 DOI: 10.3390/pathogens11070764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/06/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022] Open
Abstract
Renal leptospirosis caused by leptospiral infection is characterised by tubulointerstitial nephritis and tubular dysfunction, resulting in acute and chronic kidney injury. Metabolomic and transcriptomic data from a murine model of Leptospira infection were analysed to determine whether metabolomic data from urine were associated with transcriptome changes relevant to kidney injury caused by Leptospira infection. Our findings revealed that 37 metabolites from the urine of L. interrogans-infected mice had significantly different concentrations than L. biflexa-infected and non-infected control mice. Of these, urinary L-carnitine and acetyl-L-carnitine levels were remarkably elevated in L. interrogans-infected mice. Using an integrated pathway analysis, we found that L-carnitine and acetyl-L-carnitine were involved in metabolic pathways such as fatty acid activation, the mitochondrial L-carnitine shuttle pathway, and triacylglycerol biosynthesis that were enriched in the renal tissues of the L. interrogans-infected mice. This study highlights that L-carnitine and acetyl-L-carnitine are implicated in leptospiral infection-induced kidney injury, suggesting their potential as metabolic modulators.
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Affiliation(s)
- Kuan-Hsing Chen
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
- Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan; (H.-Y.T.); (M.-L.C.)
- Metabolomics Core Laboratory, Chang Gung University, Taoyuan 333, Taiwan
| | - Li-Fang Chou
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
| | - Cheng-Chieh Hung
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
| | - Hsiang-Yu Tang
- Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan; (H.-Y.T.); (M.-L.C.)
- Metabolomics Core Laboratory, Chang Gung University, Taoyuan 333, Taiwan
- Department of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
- Clinical Phenome Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan
| | - Mei-Ling Cheng
- Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan; (H.-Y.T.); (M.-L.C.)
- Metabolomics Core Laboratory, Chang Gung University, Taoyuan 333, Taiwan
- Department of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
- Clinical Phenome Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan
| | - Huang-Yu Yang
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
| | - Hsiang-Hao Hsu
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
| | - Ya-Chung Tian
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
| | - Chih-Wei Yang
- Kidney Research Center, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (K.-H.C.); (L.-F.C.); (C.-C.H.); (H.-Y.Y.); (H.-H.H.); (Y.-C.T.)
- Correspondence:
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5
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Implication of the IL-10-Expression Signature in the Pathogenicity of Leptospira-Infected Macrophages. Microbiol Spectr 2022; 10:e0259521. [PMID: 35638785 PMCID: PMC9241676 DOI: 10.1128/spectrum.02595-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Leptospirosis, an emerging infectious disease caused by pathogenic Leptospira spp., occurs in ecoregions with heavy rainfall and has public health implications. Macrophages are the major anti-Leptospira phagocytes that infiltrate the kidneys during renal leptospirosis, which is caused by leptospires residing in the renal tubules. The pathogenicity of Leptospira spp. in immune effector cells such as macrophages is not well understood. To evaluate this pathogenesis, we characterized and compared the transcriptome-wide alterations in macrophages infected with pathogenic and nonpathogenic Leptospira spp. Using transcriptome data and quantitative reverse transcription PCR analysis, at 2 h postinfection, the hypoxia-inducible factor-1α-dependent glycolysis pathway was implicated in pathogenic Leptospira-infected macrophages but not in nonpathogenic leptospiral infections. Immune-related biological processes were mostly activated in pathogenic Leptospira-infected macrophages, and flow cytometry investigations revealed that classically activated macrophages represent the predominant polarization status. At 24 h after infection, biological pathways associated with interleukin-10, IL-10, signaling the induction of macrophage tolerance, as well as higher levels of IL-10 mRNA and protein expression, were observed in nonpathogenic Leptospira-infected macrophages compared to in pathogenic leptospiral infection. Following leptospiral infection of macrophages, strong IL-10-expressing transcriptome signatures were observed following nonpathogenic leptospiral infection. The transcriptional programs generated in Leptospira-infected macrophages revealed an inflammatory milieu following the production of a critical anti-inflammatory cytokine, IL-10, which is implicated in controlling the pathogenicity of activated macrophages. These findings imply that IL-10-mediated anti-inflammatory responses and tolerance in activated macrophages induced by nonpathogenic Leptospira spp. infection reduce inflammation and tissue damage, thus providing a potential therapeutic target for leptospirosis. IMPORTANCE Activation of macrophages by Leptospira spp. infection is thought to be involved in the pathogenesis of leptospirosis. To evaluate the innate macrophage responses to Leptospira spp., specifically pathogenic versus nonpathogenic Leptospira spp., we characterized the entire transcriptome-wide alterations in infected macrophages. We showed that hypoxia-inducible factor-1α and immune-related pathways are activated in pathogenic leptospiral-infected macrophages. We confirmed the significantly high levels of IL-10-expressing signatures and tolerance in activated macrophages caused by nonpathogenic Leptospira infection. Furthermore, nonpathogenic leptospiral infections attenuated macrophage activation responses. These findings suggest a potential therapeutic strategy for the immune microenvironment caused by macrophage activation driven by IL-10 overexpression, which may contribute to regulating inflammation in leptospirosis.
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6
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Chou LF, Chen TW, Yang HY, Tian YC, Chang MY, Hung CC, Hsu SH, Tsai CY, Ko YC, Yang CW. Transcriptomic signatures of exacerbated progression in leptospirosis subclinical chronic kidney disease with secondary nephrotoxic injury. Am J Physiol Renal Physiol 2021; 320:F1001-F1018. [PMID: 33779314 DOI: 10.1152/ajprenal.00640.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
High-incidence regions of leptospirosis caused by Leptospira spp. coincide with chronic kidney disease. This study investigated whether asymptomatic leptospirosis is an emerging culprit that predisposes to progressive chronic kidney disease when superimposed on secondary nephrotoxic injury. Kidney histology/function and whole transcriptomic profiles were evaluated for Leptospira-infected C57/BL6 mice with adenine-induced kidney injury. The extent of tubulointerstitial kidney lesions and expression of inflammation/fibrosis genes in infected mice with low-dose (0.1%) adenine, particularly in high-dose (0.2%) adenine-fed superimposed on Leptospira-infected mice, were significantly increased compared with mice following infection or adenine diet alone, and the findings are consistent with renal transcriptome analysis. Pathway enrichment findings showed that integrin-β- and fibronectin-encoding genes had distinct expression within the integrin-linked kinase-signaling pathway, which were upregulated in 0.2% adenine-fed Leptospira-infected mice but not in 0.2% adenine-fed mice, indicating that background subclinical Leptospiral infection indeed enhanced subsequent secondary nephrotoxic kidney injury and potential pathogenic molecules associated with secondary nephrotoxic leptospirosis. Comparative analysis of gene expression patterns with unilateral ureteric obstruction-induced mouse renal fibrosis and patients with chronic kidney disease showed that differentially expressed orthologous genes such as hemoglobin-α2, PDZ-binding kinase, and DNA topoisomerase II-α were identified in infected mice fed with low-dose and high-dose adenine, respectively, revealing differentially expressed signatures identical to those found in the datasets and may serve as markers of aggravated kidney progression. This study indicates that background subclinical leptospirosis, when subjected to various degrees of subsequent secondary nephrotoxic injury, may predispose to exacerbated fibrosis, mimicking the pathophysiological process of progressive chronic kidney disease.NEW & NOTEWORTHY Leptospira-infected mice followed by secondary nephrotoxic injury exacerbated immune/inflammatory responses and renal fibrosis. Comparison with the murine model revealed candidates involved in the progression of renal fibrosis in chronic kidney disease (CKD). Comparative transcriptome study suggests that secondary nephrotoxic injury in Leptospira-infected mice recapitulates the gene expression signatures found in CKD patients. This study indicates that secondary nephrotoxic injury may exacerbate CKD in chronic Leptospira infection implicating in the progression of CKD of unknown etiology.
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Affiliation(s)
- Li-Fang Chou
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Ting-Wen Chen
- Institute of Bioinformatics and Systems Biology, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.,Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.,Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Huang-Yu Yang
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ya-Chung Tian
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ming-Yang Chang
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Chieh Hung
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shen-Hsing Hsu
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chung-Ying Tsai
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Yi-Ching Ko
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chih-Wei Yang
- Kidney Research Center and Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan.,College of Medicine, Chang Gung University, Taoyuan, Taiwan
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7
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Hsu SH, Chang MY, Lin SM, Ko YC, Chou LF, Tian YC, Hung CC, Yang CW. Peptidoglycan mediates Leptospira outer membrane protein Loa22 to toll-like receptor 2 for inflammatory interaction: a novel innate immune recognition. Sci Rep 2021; 11:1064. [PMID: 33441663 PMCID: PMC8115183 DOI: 10.1038/s41598-020-79662-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 10/06/2020] [Indexed: 01/13/2023] Open
Abstract
Leptospirosis is an overlooked zoonotic disease caused by pathogenic
Leptospira depended on virulence of Leptospira and the host–pathogen interaction. Kidney is
the major organ infected by Leptospira which
causes tubulointerstitial nephritis. Leptospira
outer membrane contains several virulence factors and an outer membrane protein A
(OmpA) like protein (Loa22) is essential for virulence. Pull-down assays suggested
that Loa22 was a potential Toll-Like Receptor 2 (TLR2) binding candidates from
pathogenic Leptospira. Confocal microscopy was
employed to observe the co-localization of TLR2 and Loa22-LPGN (Leptospira peptidoglycan) complexes. Atomic force
microscopy (AFM), side-directed mutagenesis, and enzyme-linked immunosorbent assay
(ELISA) were performed to investigate the affinity between rLoa22, LPGN, and TLR2.
Real time PCR was applied to measure the cytokines expression. Downstream signal
transduction components were verified by western blot to evaluate the gene
regulations. Mutation of two Loa22 key residues (Asp122
and Arg143) attenuated the affinities for LPGN.
rLoa22-LPGN complexes were observed to co-localize with TLR2 and provoked
inflammatory responses including CXCL8/IL8,
hCCL2/MCP-1, and hTNF-α. Affinity studies suggested that Loa22-LPGN complexes elevated
the affinity to TLR2 as compared to Loa22 protein. Downstream signals from TLR2
including p38, ERK, and JNK were regulated under rLoa22-LPGN complexes treatments.
This study identified LPGN mediates interactions between Loa22 and TLR2 and induces
downstream signals to trigger inflammatory responses. rLoa22-LPGN-TLR2 complexes
reveal a novel binding mechanism for the innate immune system.
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Affiliation(s)
- Shen-Hsing Hsu
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC
| | - Ming-Yang Chang
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC
| | - Shih-Ming Lin
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, 70101, Taiwan, ROC
| | - Yi-Ching Ko
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC
| | - Li-Feng Chou
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC
| | - Ya-Chung Tian
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC
| | - Cheng-Chieh Hung
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC.
| | - Chih-Wei Yang
- Department of Nephrology, Kidney Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 5 Fu-Shing St., Taoyuan, 33333, Taiwan, ROC.
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Holzapfel M, Bonhomme D, Cagliero J, Vernel-Pauillac F, Fanton d'Andon M, Bortolussi S, Fiette L, Goarant C, Wunder EA, Picardeau M, Ko AI, Werling D, Matsui M, Boneca IG, Werts C. Escape of TLR5 Recognition by Leptospira spp.: A Rationale for Atypical Endoflagella. Front Immunol 2020; 11:2007. [PMID: 32849665 PMCID: PMC7431986 DOI: 10.3389/fimmu.2020.02007] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 07/24/2020] [Indexed: 12/26/2022] Open
Abstract
Leptospira (L.) interrogans are invasive bacteria responsible for leptospirosis, a worldwide zoonosis. They possess two periplasmic endoflagellae that allow their motility. L. interrogans are stealth pathogens that escape the innate immune recognition of the NOD-like receptors NOD1/2, and the human Toll-like receptor (TLR)4, which senses peptidoglycan and lipopolysaccharide (LPS), respectively. TLR5 is another receptor of bacterial cell wall components, recognizing flagellin subunits. To study the contribution of TLR5 in the host defense against leptospires, we infected WT and TLR5 deficient mice with pathogenic L. interrogans and tracked the infection by in vivo live imaging of bioluminescent bacteria or by qPCR. We did not identify any protective or inflammatory role of murine TLR5 for controlling pathogenic Leptospira. Likewise, subsequent in vitro experiments showed that infections with different live strains of L. interrogans and L. biflexa did not trigger TLR5 signaling. However, unexpectedly, heat-killed bacteria stimulated human and bovine TLR5, but did not, or barely induced stimulation via murine TLR5. Abolition of TLR5 recognition required extensive boiling time of the bacteria or proteinase K treatment, showing an unusual high stability of the leptospiral flagellins. Interestingly, after using antimicrobial peptides to destabilize live leptospires, we detected TLR5 activity, suggesting that TLR5 could participate in the fight against leptospires in humans or cattle. Using different Leptospira strains with mutations in the flagellin proteins, we further showed that neither FlaA nor Fcp participated in the recognition by TLR5, suggesting a role for the FlaB. FlaB have structural homology to Salmonella FliC, and possess conserved residues important for TLR5 activation, as shown by in silico analyses. Accordingly, we found that leptospires regulate the expression of FlaB mRNA according to the growth phase in vitro, and that infection with L. interrogans in hamsters and in mice downregulated the expression of the FlaB, but not the FlaA subunits. Altogether, in contrast to different bacteria that modify their flagellin sequences to escape TLR5 recognition, our study suggests that the peculiar central localization and stability of the FlaB monomers in the periplasmic endoflagellae, associated with the downregulation of FlaB subunits in hosts, constitute an efficient strategy of leptospires to escape the TLR5 recognition and the induced immune response.
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Affiliation(s)
- Marion Holzapfel
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
| | - Delphine Bonhomme
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France.,Sorbonne Paris Cité, Université de Paris, Paris, France
| | - Julie Cagliero
- Institut Pasteur de Nouvelle Calédonie, Immunity and Inflammation Group, Institut Pasteur International Network, Noumea, France
| | - Frédérique Vernel-Pauillac
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
| | - Martine Fanton d'Andon
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
| | - Sophia Bortolussi
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
| | - Laurence Fiette
- Unité Histopathologie Humaine et Modèles Animaux, Institut Pasteur, Paris, France
| | - Cyrille Goarant
- Leptospirosis Research and Expertise Unit, Institut Pasteur International Network, Institut Pasteur de Nouvelle Calédonie, Noumea, France
| | - Elsio A Wunder
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Brazil.,Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, United States
| | | | - Albert I Ko
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Brazil.,Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, United States
| | - Dirk Werling
- Department of Pathobiology and Population Sciences, Royal Veterinary College, Hatfield, United Kingdom
| | - Mariko Matsui
- Institut Pasteur de Nouvelle Calédonie, Immunity and Inflammation Group, Institut Pasteur International Network, Noumea, France
| | - Ivo G Boneca
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
| | - Catherine Werts
- Institut Pasteur, Unité Biologie et Génétique de la Paroi Bactérienne, Paris, France.,CNRS, UMR 2001 Microbiologie Intégrative et Moléculaire, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Equipe Avenir, Paris, France
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Sun AH, Liu XX, Yan J. Leptospirosis is an invasive infectious and systemic inflammatory disease. Biomed J 2020; 43:24-31. [PMID: 32200953 PMCID: PMC7090314 DOI: 10.1016/j.bj.2019.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/15/2019] [Accepted: 12/18/2019] [Indexed: 02/07/2023] Open
Abstract
Pathogenic Leptospira species are the causative agents of leptospirosis, a world-spreading zoonotic infectious disease. The pathogens possess a powerful invasiveness by invading human body through mucosal/skin barriers, rapid entry into bloodstream to cause septicemia, diffusion from bloodstream into internal organs and tissues to cause aggravation of disease, and discharge from urine through renal tubules to form natural infectious sources. Leptospirosis patients present severe inflammatory symptoms such as high fever, myalgia and lymphadenectasis. Hemorrhage and jaundice are the pathological features of this disease. Previous studies revealed that some outer membrane proteins of Leptospira interrogans, the most important pathogenic Leptospira species, acted as adherence factors to binding to receptor molecules (fibronectin, laminin and collagens) in extracellular matrix of host cells. Collagenase, metallopeptidases and endoflagellum contributed to the invasiveness of L. interrogans. Except for lipopolysaccharide, multiple hemolysins of L. interrogans displayed a powerful ability to induce pro-inflammatory cytokines and hepatocyte apoptosis. vWA and platelet activating factor acetylhydrolase-like proteins from L. interrogans could induce severe pulmonary hemorrhage in mice. L. interrogans utilized cellular endocytic recycling and vesicular transport systems for intracellular migration and transcellular transport. All the research achievements are helpful for further understanding the virulence of pathogenic Leptospira species and pathogenesis of leptospirosis.
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Affiliation(s)
- Ai-Hua Sun
- Faculty of Basic Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, PR China
| | - Xiao-Xiang Liu
- Faculty of Basic Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, PR China
| | - Jie Yan
- Department of Medical Microbiology and Parasitology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China.
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Carrillo-Larco RM, Altez-Fernandez C, Acevedo-Rodriguez JG, Ortiz-Acha K, Ugarte-Gil C. Leptospirosis as a risk factor for chronic kidney disease: A systematic review of observational studies. PLoS Negl Trop Dis 2019; 13:e0007458. [PMID: 31120876 PMCID: PMC6550415 DOI: 10.1371/journal.pntd.0007458] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/05/2019] [Accepted: 05/11/2019] [Indexed: 01/09/2023] Open
Abstract
Background Leptospirosis is a worldwide prevalent zoonosis and chronic kidney disease (CKD) is a leading global disease burden. Because of pathophysiological changes in the kidney, it has been suggested that these conditions may be associated. However, the extent of this interaction has not been synthetized. We aimed to systematically review and critically appraise the evidence on the association between leptospirosis and CKD. Methodology/Principal findings Observational studies with a control group were selected. Leptospirosis, confirmed with laboratory methods, and CKD also based on a laboratory assessment, were the exposures and outcomes of interest. The search was conducted in EMBASE, MEDLINE, Global Health, Scopus and Web of Science. Studies selected for qualitative synthesis were assessed for risk of bias following the Newcastle-Ottawa Scale. 5,981 reports were screened, and 2 (n = 3,534) were included for qualitative synthesis. The studies were conducted in Taiwan and Nicaragua; these reported cross-sectional and longitudinal estimates. In the general population, the mean estimated glomerular filtration rate (eGFR) was lower (p<0.001) in people testing positive for antileptospira antibodies (eGFR = 98.3) than in negative controls (eGFR = 100.8). Among sugarcane applicants with high creatinine, those who were seropositive had lower eGFR (mean difference: -10.08). In a prospective analysis, people with high antileptospira antibodies titer at baseline and follow-up, had worse eGFR (p<0.05). Conclusion Although the available evidence suggests there may be a positive association between leptospirosis and CKD, whereby leptospirosis could be a risk factor for CKD, it is still premature to draw conclusions. There is an urgent need for research on this association. Leptospirosis is an infection that can affect the kidneys acutely, though it seems that even after the acute infection there could be risk of a long-term impaired kidney function. The evidence on this matter is sparse and limited, thus the need to comprehensively seek, synthetize and appraise the available scientific literature. In so doing, this work has found preliminary evidence that leptospirosis may be associated with impaired kidney function as per eGFR. This work and findings strongly reveal that more research is needed to quantify and characterize the long-term risk of CKD among those who had had leptospirosis infection. The raising burden of non-communicable diseases paired with a still non-negligible burden of communicable and neglected tropical diseases in low- and middle-income countries, deserve the synergism of these two broad fields for the benefit of patients and population health.
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Affiliation(s)
- Rodrigo M. Carrillo-Larco
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
- CRONICAS Centre of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
- Centro de Estudios de Población, Universidad Católica los Ángeles de Chimbote (ULADECH-Católica), Chimbote, Perú
- * E-mail:
| | | | | | - Karol Ortiz-Acha
- Facultad de Medicina Alberto Hurtado, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Cesar Ugarte-Gil
- Facultad de Medicina Alberto Hurtado, Universidad Peruana Cayetano Heredia, Lima, Peru
- Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
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