1
|
Wei J, Guo F, Song Y, Feng T, Wang Y, Xu K, Song J, Kaysar E, Abdukayyum R, Lin F, Li K, Li B, Qian Z, Wang X, Wang H, Xu T. Analysis of the components of Mycobacterium tuberculosis heat-resistant antigen (Mtb-HAg) and its regulation of γδ T-cell function. Cell Mol Biol Lett 2024; 29:70. [PMID: 38741147 DOI: 10.1186/s11658-024-00585-7] [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: 11/07/2023] [Accepted: 04/26/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Mycobacterium tuberculosis heat-resistant antigen (Mtb-HAg) is a peptide antigen released from the mycobacterial cytoplasm into the supernatant of Mycobacterium tuberculosis (Mtb) attenuated H37Ra strain after autoclaving at 121 °C for 20 min. Mtb-HAg can specifically induce γδ T-cell proliferation in vitro. However, the exact composition of Mtb-HAg and the protein antigens that are responsible for its function are currently unknown. METHODS Mtb-HAg extracted from the Mtb H37Ra strain was subjected to LC‒MS mass spectrometry. Twelve of the identified protein fractions were recombinantly expressed in Escherichia coli by genetic engineering technology using pET-28a as a plasmid and purified by Ni-NTA agarose resin to stimulate peripheral blood mononuclear cells (PBMCs) from different healthy individuals. The proliferation of γδ T cells and major γδ T-cell subset types as well as the production of TNF-α and IFN-γ were determined by flow cytometry. Their proliferating γδ T cells were isolated and purified using MACS separation columns, and Mtb H37Ra-infected THP-1 was co-cultured with isolated and purified γδ T cells to quantify Mycobacterium viability by counting CFUs. RESULTS In this study, Mtb-HAg from the attenuated Mtb H37Ra strain was analysed by LC‒MS mass spectrometry, and a total of 564 proteins were identified. Analysis of the identified protein fractions revealed that the major protein components included heat shock proteins and Mtb-specific antigenic proteins. Recombinant expression of 10 of these proteins in by Escherichia coli genetic engineering technology was used to successfully stimulate PBMCs from different healthy individuals, but 2 of the proteins, EsxJ and EsxA, were not expressed. Flow cytometry results showed that, compared with the IL-2 control, HspX, GroEL1, and GroES specifically induced γδ T-cell expansion, with Vγ2δ2 T cells as the main subset, and the secretion of the antimicrobial cytokines TNF-α and IFN-γ. In contrast, HtpG, DnaK, GroEL2, HbhA, Mpt63, EsxB, and EsxN were unable to promote γδ T-cell proliferation and the secretion of TNF-α and IFN-γ. None of the above recombinant proteins were able to induce the secretion of TNF-α and IFN-γ by αβ T cells. In addition, TNF-α, IFN-γ-producing γδ T cells inhibit the growth of intracellular Mtb. CONCLUSION Activated γδ T cells induced by Mtb-HAg components HspX, GroES, GroEL1 to produce TNF-α, IFN-γ modulate macrophages to inhibit intracellular Mtb growth. These data lay the foundation for subsequent studies on the mechanism by which Mtb-HAg induces γδ T-cell proliferation in vitro, as well as the development of preventive and therapeutic vaccines and rapid diagnostic reagents.
Collapse
MESH Headings
- Humans
- Antigens, Bacterial/immunology
- Antigens, Bacterial/metabolism
- Antigens, Bacterial/genetics
- Mycobacterium tuberculosis/immunology
- Mycobacterium tuberculosis/genetics
- Cell Proliferation
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Interferon-gamma/metabolism
- Interferon-gamma/immunology
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Tumor Necrosis Factor-alpha/metabolism
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/immunology
- Bacterial Proteins/metabolism
- Bacterial Proteins/genetics
- Bacterial Proteins/immunology
Collapse
Affiliation(s)
- Jing Wei
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Fangzheng Guo
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Yamin Song
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Tong Feng
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Ying Wang
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Kun Xu
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Jianhan Song
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Eldana Kaysar
- Xinjiang Key Laboratory of Hotan Characteristic Chinese Traditional Medicine Research, College of Xinjiang Uyghur Medicine, Hotan, 848099, China
| | - Reyima Abdukayyum
- Xinjiang Key Laboratory of Hotan Characteristic Chinese Traditional Medicine Research, College of Xinjiang Uyghur Medicine, Hotan, 848099, China
| | - Feiyang Lin
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Kangsheng Li
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Baiqing Li
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Zhongqing Qian
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China
| | - Xiaojing Wang
- Anhui Province Key Laboratory of Clinical and Preclinical Research in Respiratory Disease, Bengbu Medical University, Bengbu, 233000, China
| | - Hongtao Wang
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China.
- Xinjiang Key Laboratory of Hotan Characteristic Chinese Traditional Medicine Research, College of Xinjiang Uyghur Medicine, Hotan, 848099, China.
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China.
| | - Tao Xu
- Laboratory Medicine Experimental Center, Laboratory Medicine College, Bengbu Medical University, Bengbu, 233000, China.
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical University, Bengbu, 233000, China.
| |
Collapse
|
3
|
Romero MM, Basile JI, López B, Ritacco V, Barrera L, Sasiain MDC, Alemán M. Outbreaks of Mycobacterium tuberculosis MDR strains differentially induce neutrophil respiratory burst involving lipid rafts, p38 MAPK and Syk. BMC Infect Dis 2014; 14:262. [PMID: 24886274 PMCID: PMC4049492 DOI: 10.1186/1471-2334-14-262] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 05/07/2014] [Indexed: 11/16/2022] Open
Abstract
Background Neutrophils (PMN) are the first cells to infiltrate the lung after infection, and they play a significant protective role in the elimination of pathogen, by releasing preformed oxidants and proteolytic enzymes from granules and generating ROS, thus limiting inflammation by succumbing to apoptosis. In a previous study, we found marked differences in ROS-induced apoptosis between two Mycobacterium tuberculosis (Mtb) strains, M and Ra, representative of widespread Mtb families in South America, i.e. Haarlem and Latin-American Mediterranean (LAM), being strain M able to generate further drug resistance and to disseminate aggressively. Methods In this study we evaluate the nature of bacteria-PMN interaction by assessing ROS production, apoptosis, lipid raft coalescence, and phagocytosis induced by Mtb strains. Results Dectin-1 and TLR2 participate in Mtb-induced ROS generation and apoptosis in PMN involving p38 MAPK and Syk activation with the participation of a TLR2-dependent coalescence of lipid rafts. Further, ROS production occurs during the phagocytosis of non-opsonized bacteria and involves α-glucans on the capsule. In contrast, strain M lacks the ability to induce ROS because of: 1) a reduced phagocytosis and 2) a failure in coalescence of lipid raft. Conclusions The differences in wall composition could explain the success of some strains which stay unnoticed by the host through inhibition of apoptosis and ROS but making possible its replication inside PMN as a potential evasion mechanism. Innate immune responses elicited by Mtb strain-to-strain variations need to be considered in TB vaccine development.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Mercedes Alemán
- Inmunologia de enfermedades respiratorias, IMEX-CONTICET-ANM, Buenos Aires, Argentina.
| |
Collapse
|
4
|
Qrafli M, Amar Y, Bourkadi J, Ben Amor J, Iraki G, Bakri Y, Amzazi S, Lahlou O, Seghrouchni F, El Aouad R, Sadki K. The CYP7A1 gene rs3808607 variant is associated with susceptibility of tuberculosis in Moroccan population. Pan Afr Med J 2014; 18:1. [PMID: 25360185 PMCID: PMC4212432 DOI: 10.11604/pamj.2014.18.1.3397] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 04/22/2014] [Indexed: 11/11/2022] Open
Abstract
Introduction Despite the medical progress in treatment. Tuberculosis (TB) continues to be a serious global health problem. A genome-wide linkage study identified a major susceptibility locus on chromosomal region 8q12-q13 in Moroccan TB patients. The CYP7A1 gene is located in this region and codes for cholesterol 7a-hydroxylase, an enzyme involved in cholesterol catabolism. Methods We selected three SNPs (rs3808607, rs8192875 and rs8192879) and studied their genotype and allele frequencies distribution in patients with pulmonary (PTB) or pleural TB (pTB), and compared them to Healthy Controls (HC). Genotyping of rs8192875 and rs8192879 SNPs was carried out using the Taq Man SNP genotyping Assay while rs3808607 was investigated by PCR-RFLP. Results We reported here for the first time a statistically significant increase in the AA homozygote genotype frequency of rs3808607 in PTB patients compared to HC (p = 0.02, OR = 1.93, 95% CI: 1.93 (1.07;3.49). The increased risk of developing TB was maintained when we combined the groups of patients (PTB-pTB) (p = 0.01, OR= 1.91, 95% CI = (1.07 - 3.42). In contrast, no genetic association was observed between the rs8192875 or rs8192879 polymorphisms and TB. Conclusion Our investigations suggest that rs3808607 may play a role in susceptibility to TB in a Moroccan population.
Collapse
Affiliation(s)
- Mounia Qrafli
- Laboratory of Human Genomic, National Institute of Hygiene, Rabat, Morocco ; Laboratory of Biochemistry and Immunology, Faculty of Sciences, University Mohammed V, Rabat, Morocco
| | - Youssef Amar
- Laboratory of Biochemistry and Immunology, Faculty of Sciences, University Mohammed V, Rabat, Morocco
| | | | - Jouda Ben Amor
- Department of Pneumophtisiology, Moulay Youssef Hospital, Rabat, Morocco
| | - Ghali Iraki
- Department of Pneumophtisiology, Moulay Youssef Hospital, Rabat, Morocco
| | - Youssef Bakri
- Laboratory of Biochemistry and Immunology, Faculty of Sciences, University Mohammed V, Rabat, Morocco
| | - Saaîd Amzazi
- Laboratory of Biochemistry and Immunology, Faculty of Sciences, University Mohammed V, Rabat, Morocco
| | - Ouafae Lahlou
- Laboratory of Human Genomic, National Institute of Hygiene, Rabat, Morocco
| | - Fouad Seghrouchni
- Laboratory of Human Genomic, National Institute of Hygiene, Rabat, Morocco
| | - Rajae El Aouad
- Laboratory of Human Genomic, National Institute of Hygiene, Rabat, Morocco
| | - Khalid Sadki
- Laboratory of Biochemistry and Immunology, Faculty of Sciences, University Mohammed V, Rabat, Morocco
| |
Collapse
|
5
|
Cheng HY, Wu R, Gebre AK, Hanna RN, Smith DJ, Parks JS, Ley K, Hedrick CC. Increased cholesterol content in gammadelta (γδ) T lymphocytes differentially regulates their activation. PLoS One 2013; 8:e63746. [PMID: 23704936 PMCID: PMC3660587 DOI: 10.1371/journal.pone.0063746] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 04/04/2013] [Indexed: 11/18/2022] Open
Abstract
Gammadelta (γδ) T lymphocytes respond quickly upon antigen encounter to produce a cytokine response. In this study, we sought to understand how functions of γδ T cells are differentially regulated compared to αβ T cells. We found that cholesterol, an integral component of the plasma membrane and a regulator of TCR signaling, is increased in γδ T cells compared to αβ T cells, and modulates their function. Higher levels of activation markers, and increased lipid raft content in γδ cells suggest that γδ T cells are more activated. Cholesterol depletion effectively decreased lipid raft formation and activation of γδ T cells, indicating that increased cholesterol content contributes to the hyper-activated phenotype of γδ T cells, possibly through enhanced clustering of TCR signals in lipid rafts. TCR stimulation assays and western blotting revealed that instead of a lower TCR threshold, enhanced TCR signaling through ERK1/2 activation is likely the cause for high cholesterol-induced rapid activation and proliferation in γδ T cells. Our data indicate that cholesterol metabolism is differentially regulated in γδ T cells. The high intracellular cholesterol content leads to enhanced TCR signaling and increases activation and proliferation of γδ T cells.
Collapse
Affiliation(s)
- Hsin-Yuan Cheng
- Division of Inflammation Biology, La Jolla Institute for Allergy & Immunology, La Jolla, California, United States of America
| | - Runpei Wu
- Division of Inflammation Biology, La Jolla Institute for Allergy & Immunology, La Jolla, California, United States of America
| | - Abraham K. Gebre
- Department of Pathology/Lipid Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Richard N. Hanna
- Division of Inflammation Biology, La Jolla Institute for Allergy & Immunology, La Jolla, California, United States of America
| | - Dan J. Smith
- Targeson, Inc., San Diego, California, United States of America
| | - John S. Parks
- Department of Pathology/Lipid Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Klaus Ley
- Division of Inflammation Biology, La Jolla Institute for Allergy & Immunology, La Jolla, California, United States of America
| | - Catherine C. Hedrick
- Division of Inflammation Biology, La Jolla Institute for Allergy & Immunology, La Jolla, California, United States of America
- * E-mail:
| |
Collapse
|