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Roy D, Ehtesham NZ, Hasnain SE. Is Mycobacterium tuberculosis carcinogenic to humans? FASEB J 2021; 35:e21853. [PMID: 34416038 DOI: 10.1096/fj.202001581rr] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 05/20/2021] [Accepted: 07/29/2021] [Indexed: 12/13/2022]
Abstract
We highlight the ability of the tuberculosis (TB) causing bacterial pathogen, Mycobacterium tuberculosis (Mtb), to induce key characteristics that are associated with established IARC classified Group 1 and Group 2A carcinogenic agents. There is sufficient evidence from epidemiological case-control, cohort and meta-analysis studies of increased lung cancer (LC) risk in pre-existing/active/old TB cases. Similar to carcinogens and other pathogenic infectious agents, exposure to aerosol-containing Mtb sprays in mice produce malignant transformation of cells that result in squamous cell carcinoma. Convincing, mechanistic data show several characteristics shared between TB and LC which include chronic inflammation, genomic instability and replicative immortality, just to name a few cancer hallmarks. These hallmarks of cancer may serve as precursors to malignant transformation. Together, these findings form the basis of our postulate that Mtb is a complete human pulmonary carcinogen. We also discuss how Mtb may act as both an initiating agent and promoter of tumor growth. Forthcoming experimental studies will not only serve as proof-of-concept but will also pivot our understanding of how to manage/treat TB cases as well as offer solutions to clinical conundrums of TB lesions masquerading as tumors. Clinical validation of our concept may also help pave the way for next generation personalized medicine for the management of pulmonary TB/cancer particularly for cases that are not responding well to conventional chemotherapy or TB drugs.
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Affiliation(s)
- Deodutta Roy
- Department of Environmental Health Sciences, Florida International University, Miami, FL, USA
| | - Nasreen Z Ehtesham
- ICMR-National Institute of Pathology, Safdarjung Hospital Campus, New Delhi, India
| | - Seyed Ehtesham Hasnain
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, India.,Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology, Delhi (IIT-D), New Delhi, India
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Pathak L, Das B. Initiation of Post-Primary Tuberculosis of the Lungs: Exploring the Secret Role of Bone Marrow Derived Stem Cells. Front Immunol 2021; 11:594572. [PMID: 33584661 PMCID: PMC7873989 DOI: 10.3389/fimmu.2020.594572] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 12/03/2020] [Indexed: 01/01/2023] Open
Abstract
Mycobacterium tuberculosis (Mtb), the causative organism of pulmonary tuberculosis (PTB) now infects more than half of the world population. The efficient transmission strategy of the pathogen includes first remaining dormant inside the infected host, next undergoing reactivation to cause post-primary tuberculosis of the lungs (PPTBL) and then transmit via aerosol to the community. In this review, we are exploring recent findings on the role of bone marrow (BM) stem cell niche in Mtb dormancy and reactivation that may underlie the mechanisms of PPTBL development. We suggest that pathogen's interaction with the stem cell niche may be relevant in potential inflammation induced PPTBL reactivation, which need significant research attention for the future development of novel preventive and therapeutic strategies for PPTBL, especially in a post COVID-19 pandemic world. Finally, we put forward potential animal models to study the stem cell basis of Mtb dormancy and reactivation.
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Affiliation(s)
- Lekhika Pathak
- Department of Stem Cell and Infectious Diseases, KaviKrishna Laboratory, Guwahati Biotech Park, Indian Institute of Technology, Guwahati, India
- KaviKrishna Telemedicine Care, Sualkuchi, India
| | - Bikul Das
- Department of Stem Cell and Infectious Diseases, KaviKrishna Laboratory, Guwahati Biotech Park, Indian Institute of Technology, Guwahati, India
- KaviKrishna Telemedicine Care, Sualkuchi, India
- Department of Stem Cell and Infection, Thoreau Laboratory for Global Health, M2D2, University of Massachusetts, Lowell, MA, United States
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Bezerra-Santos M, do Vale-Simon M, Barreto AS, Cazzaniga RA, de Oliveira DT, Barrios MR, Ferreira AR, Santos-Bio NC, Reed SG, de Almeida RP, Corrêa CB, Duthie MS, de Jesus AR. Mycobacterium leprae Recombinant Antigen Induces High Expression of Multifunction T Lymphocytes and Is Promising as a Specific Vaccine for Leprosy. Front Immunol 2018; 9:2920. [PMID: 30631322 PMCID: PMC6315144 DOI: 10.3389/fimmu.2018.02920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/28/2018] [Indexed: 11/13/2022] Open
Abstract
Leprosy is a chronic disease caused by M. leprae infection that can cause severe neurological complications and physical disabilities. A leprosy-specific vaccine would be an important component within control programs but is still lacking. Given that multifunctional CD4 T cells [i.e., those capable of simultaneously secreting combinations of interferon (IFN)-γ, interleukin (IL)-2, and tumor necrosis factor (TNF)] have now been implicated in the protective response to several infections, we tested the hypothesis if a recombinant M. leprae antigen-specific multifunctional T cells differed between leprosy patients and their healthy contacts. We used whole blood assays and peripheral blood mononuclear cells to characterize the antigen-specific T cell responses of 39 paucibacillary (PB) and 17 multibacillary (MB) leprosy patients and 31 healthy household contacts (HHC). Cells were incubated with either crude mycobacterial extracts (M. leprae cell sonicate–MLCS) and purified protein derivative (PPD) or recombinant ML2028 protein, the homolog of M. tuberculosis Ag85B. Multiplex assay revealed antigen-specific production of IFN-γ and IL-2 from cells of HHC and PB, confirming a Th1 bias within these individuals. Multiparameter flow cytometry then revealed that the population of multifunctional ML2028-specific T cells observed in HHC was larger than that observed in PB patients. Taken together, our data suggest that these multifunctional antigen-specific T cells provide a more effective response against M. leprae infection that prevents the development of leprosy. These data further our understanding of M. leprae infection/leprosy and are instructive for vaccine development.
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Affiliation(s)
- Márcio Bezerra-Santos
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil.,Department of Health Education, Federal University of Sergipe, Lagarto, Brazil
| | - Marise do Vale-Simon
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil
| | - Aline Silva Barreto
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil
| | | | | | - Mônica Rueda Barrios
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil
| | - Alex Ricardo Ferreira
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil.,Infectious Disease Research Institute, Seattle, WA, United States
| | - Nanci C Santos-Bio
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil.,Infectious Disease Research Institute, Seattle, WA, United States
| | - Steven G Reed
- Instituto de Investigação em Imunologia, INCT-CNPq, São Paulo, Brazil
| | - Roque Pacheco de Almeida
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil.,Infectious Disease Research Institute, Seattle, WA, United States.,Department of Medicine, Federal University of Sergipe, Aracaju, Brazil
| | - Cristiane Bani Corrêa
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil
| | - Malcolm S Duthie
- Instituto de Investigação em Imunologia, INCT-CNPq, São Paulo, Brazil
| | - Amélia Ribeiro de Jesus
- Laboratory of Immunology and Molecular Biology, Federal University of Sergipe, Aracaju, Brazil.,Infectious Disease Research Institute, Seattle, WA, United States.,Department of Medicine, Federal University of Sergipe, Aracaju, Brazil
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