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Li J, Dou Y. Mycobacterium tuberculosis protein Rv2652c enhances intracellular survival by inhibiting host immune responses. Immun Inflamm Dis 2024; 12:e70012. [PMID: 39240051 PMCID: PMC11378267 DOI: 10.1002/iid3.70012] [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: 06/08/2024] [Revised: 08/07/2024] [Accepted: 08/22/2024] [Indexed: 09/07/2024] Open
Abstract
BACKGROUNDS Mycobacterium tuberculosis (Mtb), the pathogen responsible for tuberculosis, secretes a multitude of proteins that modulate the host's immune response to ensure its own persistence. The region of difference (RD) genes encoding proteins play key roles in TB immunity and pathogenesis. Nevertheless, the roles of the majority of RD-encoded proteins remain to be elucidated. OBJECTS To elucidate the role of Rv2652c located in RD13 in Mtb on bacterial growth, bacterial survival, and host immune response. METHODS We constructed the strain MS_Rv2652c which over-expresses Mtb RD-encoding protein Rv2652c in M. smegmatis (MS), and compared it with the wild strain in the bacterial growth, bacterial survival, virulence of Rv2652c, and determined the effect of MS_Rv2652c on host immune response in macrophages. RESULTS Rv2652c protein is located at cell wall of MS_Rv2652c strain and also an integral component of the Mtb H37Rv cell wall. Rv2652c can enhance the resistance of recombinant MS to various stressors. Moreover, Rv2652c inhibits host proinflammatory responses via modulation of the NF-κB pathway, thereby promoting Mtb survival in vitro and in vivo. CONCLUSION Our data suggest that cell wall protein Rv2652c plays an important role in creating a favorable environment for bacterial survival by modulating host signals and could be established as a potential TB drug target.
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Affiliation(s)
- Jihong Li
- Hubei Key Laboratory of Tumor Microenvironment and ImmunotherapyChina Three Gorges UniversityYichangChina
- Yichang Key Laboratory of Infection and InflammationChina Three Gogres UniversityYichangChina
| | - Yafeng Dou
- Hubei Key Laboratory of Tumor Microenvironment and ImmunotherapyChina Three Gorges UniversityYichangChina
- Yichang Key Laboratory of Integrated Traditional Chinese and Western Medicine for the Prevention and Treatment of Immunological DiseasesThe Second People's Hospital of China Three Gorges UniversityYichangChina
- Department of LaboratoryThe Second People's Hospital of China Three Gorges UniversityYichangChina
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2
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Niu L, Wang H, Luo G, Zhou J, Hu Z, Yan B. Advances in understanding immune homeostasis in latent tuberculosis infection. WIREs Mech Dis 2024; 16:e1643. [PMID: 38351551 DOI: 10.1002/wsbm.1643] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/19/2024] [Accepted: 01/19/2024] [Indexed: 07/13/2024]
Abstract
Nearly one-fourth of the global population is infected by Mycobacterium tuberculosis (Mtb), and approximately 90%-95% remain asymptomatic as latent tuberculosis infection (LTBI), an estimated 5%-10% of those with latent infections will eventually progress to active tuberculosis (ATB). Although it is widely accepted that LTBI transitioning to ATB results from a disruption of host immune balance and a weakening of protective immune responses, the exact underlying immunological mechanisms that promote this conversion are not well characterized. Thus, it is difficult to accurately predict tuberculosis (TB) progression in advance, leaving the LTBI population as a significant threat to TB prevention and control. This article systematically explores three aspects related to the immunoregulatory mechanisms and translational research about LTBI: (1) the distinct immunocytological characteristics of LTBI and ATB, (2) LTBI diagnostic markers discovery related to host anti-TB immunity and metabolic pathways, and (3) vaccine development focus on LTBI. This article is categorized under: Infectious Diseases > Molecular and Cellular Physiology Infectious Diseases > Genetics/Genomics/Epigenetics Immune System Diseases > Genetics/Genomics/Epigenetics.
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Affiliation(s)
- Liangfei Niu
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Hao Wang
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, China
| | - Geyang Luo
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Jing Zhou
- Department of Pathology, Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Zhidong Hu
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Bo Yan
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
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3
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Dinakaran C, Prasad KP, Bedekar MK, Jeena K, Acharya A, Poojary N. In vitro analysis of the expression of inflammasome, antiviral, and immune genes in an Oreochromis niloticus liver cell line following stimulation with bacterial ligands and infection with tilapia lake virus. Arch Virol 2024; 169:148. [PMID: 38888759 DOI: 10.1007/s00705-024-06077-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 04/29/2024] [Indexed: 06/20/2024]
Abstract
The inflammasome is a multimeric protein complex that plays a vital role in the defence against pathogens and is therefore considered an essential component of the innate immune system. In this study, the expression patterns of inflammasome genes (NLRC3, ASC, and CAS-1), antiviral genes (IFNγ and MX), and immune genes (IL-1β and IL-18) were analysed in Oreochromis niloticus liver (ONIL) cells following stimulation with the bacterial ligands peptidoglycan (PGN) and lipopolysaccharide (LPS) and infection with TiLV. The cells were stimulated with PGN and LPS at concentrations of 10, 25, and 50 µg/ml. For viral infection, 106 TCID50 of TiLV per ml was used. After LPS stimulation, all seven genes were found to be expressed at specific time points at each of the three doses tested. However, at even higher doses of LPS, NLRC3 levels decreased. Following TiLV infection, all of the genes showed significant upregulation, especially at early time points. However, the gene expression pattern was found to be unique in PGN-treated cells. For instance, NLRC3 and ASC did not show any response to PGN stimulation, and the expression of IFNγ was downregulated at 25 and 50 µg of PGN per ml. CAS-1 and IL-18 expression was downregulated at 25 µg of PGN per ml. At a higher dose (50 µg/ml), IL-1β showed downregulation. Overall, our results indicate that these genes are involved in the immune response to viral and bacterial infection and that the degree of response is ligand- and dose-dependent.
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Affiliation(s)
- Chandana Dinakaran
- ICAR- Central Institute of Fisheries Education, Mumbai, Maharashtra, India
| | | | - Megha K Bedekar
- ICAR- Central Institute of Fisheries Education, Mumbai, Maharashtra, India
| | - Kezhedath Jeena
- ICAR- Central Institute of Fisheries Education, Mumbai, Maharashtra, India
| | - Arpit Acharya
- ICAR- Central Institute of Fisheries Education, Mumbai, Maharashtra, India
| | - Nalini Poojary
- ICAR- Central Institute of Fisheries Education, Mumbai, Maharashtra, India
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4
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Luo G, Zeng D, Liu J, Li D, Takiff HE, Song S, Gao Q, Yan B. Temporal and cellular analysis of granuloma development in mycobacterial infected adult zebrafish. J Leukoc Biol 2024; 115:525-535. [PMID: 37982587 DOI: 10.1093/jleuko/qiad145] [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: 11/09/2022] [Revised: 09/25/2023] [Accepted: 11/01/2023] [Indexed: 11/21/2023] Open
Abstract
Because granulomas are a hallmark of tuberculosis pathogenesis, the study of the dynamic changes in their cellular composition and morphological character can facilitate our understanding of tuberculosis pathogenicity. Adult zebrafish infected with Mycobacterium marinum form granulomas that are similar to the granulomas in human patients with tuberculosis and therefore have been used to study host-mycobacterium interactions. Most studies of zebrafish granulomas, however, have focused on necrotic granulomas, while a systematic description of the different stages of granuloma formation in the zebrafish model is lacking. Here, we characterized the stages of granulomas in M. marinum-infected zebrafish, including early immune cell infiltration, nonnecrotizing granulomas, and necrotizing granulomas, using corresponding samples from patients with pulmonary tuberculosis as references. We combined hematoxylin and eosin staining and in situ hybridization to identify the different immune cell types and follow their spatial distribution in the different stages of granuloma development. The macrophages in zebrafish granulomas were shown to belong to distinct subtypes: epithelioid macrophages, foamy macrophages, and multinucleated giant cells. By defining the developmental stages of zebrafish granulomas and the spatial distribution of the different immune cells they contain, this work provides a reference for future studies of mycobacterial granulomas and their immune microenvironments.
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Affiliation(s)
- Geyang Luo
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, 130 Dongan Rd., Xuhui District, 200032 Shanghai, People's Republic of China
| | - Dong Zeng
- Department of Pathology, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
| | - Jianxin Liu
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
- School of Medicine, Shanghai Ninth People's Hospital Affiliated to Shanghai JiaoTong University, 639 Manufacturing Bureau Rd., Huangpu District, 200011 Shanghai, People's Republic of China
| | - Duoduo Li
- Department of Pathology, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
| | - Howard E Takiff
- Instituto Venezolano de Investigaciones Científicas, Centro de Microbiología y Biología Celular, Caracas, 1020A, Venezuela
| | - Shu Song
- Department of Pathology, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
| | - Qian Gao
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, 130 Dongan Rd., Xuhui District, 200032 Shanghai, People's Republic of China
| | - Bo Yan
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Rd., Jinshan District, 201508 Shanghai, People's Republic of China
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Guo M, Zhang J, Li M, Zhang X, Wu Y. NLRC3 negatively regulates Pasteurella multocida-induced NF-κB signaling in rabbits. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 150:105078. [PMID: 37820760 DOI: 10.1016/j.dci.2023.105078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 10/08/2023] [Accepted: 10/08/2023] [Indexed: 10/13/2023]
Abstract
Pasteurella multocida (P. multocida) is a significant zoonotic pathogen that has the ability to infect various animals. The inflammatory response caused by P. multocida and the negative regulatory mechanism are not completely understood. NOD-like receptor family CARD-containing 3 (NLRC3), an intracellular member of the NLR family, has been reported as a negative regulator in human. In this study, we aimed to explore the role of rabbit NLRC3 (rNLRC3) in P. multocida infection. Our findings revealed a negative correlation between the expression of rNLRC3 and inflammatory cytokines during P. multocida infection. The expression of rNLRC3 was reduced at the initial stage of P. multocida infection and then recovered. Furthermore, rNLRC3 significantly inhibited the activation of NF-κB by reducing phosphorylation and nuclear import of p65 in response to P. multocida infection. Additionally, overexpression of rNLRC3 attenuated the expression of pro-inflammatory cytokines IL-1β, IL-6, IL-8, and TNF-α. Moreover, we demonstrated that rNLRC3 diminished NF-κB activation by interacting with rTRAF4 and rTRAF6. Overexpression of rNLRC3 promoted P. multocida proliferation, while P. multocida proliferation decreased after knockdown of rNLRC3. We also found that the NACHT-LRR domain is a functional domain of rNLRC3 that regulates the NF-κB pathway. Our study suggests that rNLRC3 negatively regulates P. multocida-induced NF-κB signaling in rabbits. It can serve as a checkpoint to prevent dysfunctional inflammation.
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Affiliation(s)
- Mengjiao Guo
- Jiangsu Co-Innovation Center for Prevention of Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Jiaqi Zhang
- Jiangsu Co-Innovation Center for Prevention of Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Mingtao Li
- Jiangsu Co-Innovation Center for Prevention of Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Xiaorong Zhang
- Jiangsu Co-Innovation Center for Prevention of Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China.
| | - Yantao Wu
- Jiangsu Co-Innovation Center for Prevention of Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China; Joint International Research Laboratory of Agriculture & Agri-Product Safety, Yangzhou University (JIRLAAPS), Yangzhou, 225009, China.
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6
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Ding Y, Bei C, Xue Q, Niu L, Tong J, Chen Y, Takiff HE, Gao Q, Yan B. Transcriptomic Analysis of Mycobacterial Infected Macrophages Reveals a High MOI Specific Type I IFN Signaling. Infect Immun 2023; 91:e0015523. [PMID: 37338365 PMCID: PMC10353393 DOI: 10.1128/iai.00155-23] [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: 04/25/2023] [Accepted: 05/24/2023] [Indexed: 06/21/2023] Open
Abstract
Macrophage (MΦ) infection models are important tools for studying host-mycobacterial interactions. Although the multiplicity of infection (MOI) is an important experimental variable, the selection of MOI in mycobacterial infection experiments is largely empirical, without reference to solid experimental data. To provide relevant data, we used RNA-seq to analyze the gene expression profiles of MΦs 4 or 24 h after infection with Mycobacterium marinum (M. m) at MOIs ranging from 0.1 to 50. Analysis of differentially expressed genes (DEGs) showed that different MOIs are linked to distinct transcriptomic changes and only 10% of DEGs were shared by MΦ infected at all MOIs. KEGG pathway enrichment analysis revealed that type I interferon (IFN)-related pathways were inoculant dose-dependent and enriched only at high MOIs, whereas TNF pathways were inoculant dose-independent and enriched at all MOIs. Protein-protein interaction (PPI) network alignment showed that different MOIs had distinct key node genes. By fluorescence-activated cell sorting and follow-up RT-PCR analysis, we could separate infected MΦs from uninfected MΦs and found phagocytosis of mycobacteria to be the determinant factor for type I IFN production. The distinct transcriptional regulation of RAW264.7 MΦ genes at different MOIs was also seen with Mycobacterium tuberculosis (M.tb) infections and primary MΦ infection models. In summary, transcriptional profiling of mycobacterial infected MΦs revealed that different MOIs activate distinct immune pathways and the type I IFN pathway is activated only at high MOIs. This study should provide guidance for selecting the MOI most appropriate for different research questions.
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Affiliation(s)
- Yue Ding
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Cheng Bei
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Qinghua Xue
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Liangfei Niu
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Jingfeng Tong
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Yiwang Chen
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Howard E. Takiff
- Laboratorio de Genética Molecular, CMBC, IVIC, Caracas, Venezuela
| | - Qian Gao
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Shanghai Institute of Infectious Disease and Biosecurity and Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Bo Yan
- Center for Tuberculosis Research, Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
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7
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McConnell SC, Hernandez KM, Andrade J, de Jong JLO. Immune gene variation associated with chromosome-scale differences among individual zebrafish genomes. Sci Rep 2023; 13:7777. [PMID: 37179373 PMCID: PMC10183018 DOI: 10.1038/s41598-023-34467-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/30/2023] [Indexed: 05/15/2023] Open
Abstract
Immune genes have evolved to maintain exceptional diversity, offering robust defense against pathogens. We performed genomic assembly to examine immune gene variation in zebrafish. Gene pathway analysis identified immune genes as significantly enriched among genes with evidence of positive selection. A large subset of genes was absent from analysis of coding sequences due to apparent lack of reads, prompting us to examine genes overlapping zero coverage regions (ZCRs), defined as 2 kb stretches without mapped reads. Immune genes were identified as highly enriched within ZCRs, including over 60% of major histocompatibility complex (MHC) genes and NOD-like receptor (NLR) genes, mediators of direct and indirect pathogen recognition. This variation was most highly concentrated throughout one arm of chromosome 4 carrying a large cluster of NLR genes, associated with large-scale structural variation covering more than half of the chromosome. Our genomic assemblies uncovered alternative haplotypes and distinct complements of immune genes among individual zebrafish, including the MHC Class II locus on chromosome 8 and the NLR gene cluster on chromosome 4. While previous studies have shown marked variation in NLR genes between vertebrate species, our study highlights extensive variation in NLR gene regions between individuals of the same species. Taken together, these findings provide evidence of immune gene variation on a scale previously unknown in other vertebrate species and raise questions about potential impact on immune function.
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Affiliation(s)
- Sean C McConnell
- Section of Hematology-Oncology and Stem Cell Transplant, Department of Pediatrics, The University of Chicago, Chicago, IL, 60637, USA
| | - Kyle M Hernandez
- Center for Research Informatics, The University of Chicago, Chicago, IL, 60637, USA
- Department of Medicine, Computational Biomedicine and Biomedical Data Science, Center for Translational Data Science, The University of Chicago, Chicago, IL, 60637, USA
| | - Jorge Andrade
- Center for Research Informatics, The University of Chicago, Chicago, IL, 60637, USA
- Kite Pharma, Santa Monica, CA, 90404, USA
| | - Jill L O de Jong
- Section of Hematology-Oncology and Stem Cell Transplant, Department of Pediatrics, The University of Chicago, Chicago, IL, 60637, USA.
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Chang MX. Emerging mechanisms and functions of inflammasome complexes in teleost fish. Front Immunol 2023; 14:1065181. [PMID: 36875130 PMCID: PMC9978379 DOI: 10.3389/fimmu.2023.1065181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 02/06/2023] [Indexed: 02/18/2023] Open
Abstract
Inflammasomes are multiprotein complexes, which are assembled in response to a diverse range of exogenous pathogens and endogenous danger signals, leading to produce pro-inflammatory cytokines and induce pyroptotic cell death. Inflammasome components have been identified in teleost fish. Previous reviews have highlighted the conservation of inflammasome components in evolution, inflammasome function in zebrafish infectious and non-infectious models, and the mechanism that induce pyroptosis in fish. The activation of inflammasome involves the canonical and noncanonical pathways, which can play critical roles in the control of various inflammatory and metabolic diseases. The canonical inflammasomes activate caspase-1, and their signaling is initiated by cytosolic pattern recognition receptors. However the noncanonical inflammasomes activate inflammatory caspase upon sensing of cytosolic lipopolysaccharide from Gram-negative bacteria. In this review, we summarize the mechanisms of activation of canonical and noncanonical inflammasomes in teleost fish, with a particular focus on inflammasome complexes in response to bacterial infection. Furthermore, the functions of inflammasome-associated effectors, specific regulatory mechanisms of teleost inflammasomes and functional roles of inflammasomes in innate immune responses are also reviewed. The knowledge of inflammasome activation and pathogen clearance in teleost fish will shed new light on new molecular targets for treatment of inflammatory and infectious diseases.
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Affiliation(s)
- Ming Xian Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of InSciences, Wuhan, China.,College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China.,Innovation Academy for Seed Design, Chinese Academy of Sciences, Wuhan, China
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9
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He S, Fan H, Sun B, Yang M, Liu H, Yang J, Liu J, Luo S, Chen Z, Zhou J, Xia L, Zhang S, Yan B. Tibetan medicine salidroside improves host anti-mycobacterial response by boosting inflammatory cytokine production in zebrafish. Front Pharmacol 2022; 13:936295. [PMID: 36120339 PMCID: PMC9470765 DOI: 10.3389/fphar.2022.936295] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/29/2022] [Indexed: 12/02/2022] Open
Abstract
The treatment for tuberculosis (TB), especially multidrug-resistant TB (MDR-TB), has a prolonged cycle which can last up to a year. This is partially due to the lack of effective therapies. The development of novel anti-TB drugs from the perspective of host immune regulation can provide an important supplement for conventional treatment strategies. Salidroside (SAL), a bioactive component from the Tibetan medicine Rhodiola rosea, has been used in the treatment of TB, although its mechanism remains unclear. Here, the bacteriostatic effect of SAL in vivo was first demonstrated using a zebrafish–M. marinum infection model. To further investigate the underlying mechanism, we then examined the impact of SAL on immune cell recruitment during wound and infection. Increased macrophage and neutrophil infiltrations were found both in the vicinity of the wound and infection sites after SAL treatment compared with control, which might be due to the elevated chemokine expression levels after SAL treatment. SAL treatment alone was also demonstrated to improve the survival of infected zebrafish larvae, an effect that was amplified when combining SAL treatment with isoniazid or rifampicin. Interestingly, the reduced bacterial burden and improved survival rate under SAL treatment were compromised in tnfα-deficient embryos which suggests a requirement of Tnfα signaling on the anti-mycobacterial effects of SAL. In summary, this study provides not only the cellular and molecular mechanisms for the host anti-mycobacterial effects of the Tibetan medicine SAL but also proof of concept that combined application of SAL with traditional first-line anti-TB drugs could be a novel strategy to improve treatment efficacy.
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Affiliation(s)
- Shumei He
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
- *Correspondence: Shumei He, ; Shulin Zhang, ; Bo Yan,
| | - Hongyan Fan
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Bin Sun
- Department of Stomatology, The First Affiliated Hospital of Shihezi University Medical College, Shihezi, China
| | - Meipan Yang
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
| | - Hongxu Liu
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Jianwei Yang
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Jianxin Liu
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Sizhu Luo
- Key Laboratory of Molecular Mechanistic and Interventional Research of Plateau Diseases in Tibet Autonomous Region, Key Laboratory of High Altitude Hypoxia Environment and Life Health, Joint Central Laboratory for Active Components and Pharmacological Mechanism of Tibetan Medicine, School of Medicine, Xizang Minzu University, Xianyang, China
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Zihan Chen
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- Medical College, China Three Gorges University, Yichang, China
| | - Jing Zhou
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- Medical College, China Three Gorges University, Yichang, China
| | - Lu Xia
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Shulin Zhang
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- *Correspondence: Shumei He, ; Shulin Zhang, ; Bo Yan,
| | - Bo Yan
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
- *Correspondence: Shumei He, ; Shulin Zhang, ; Bo Yan,
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