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Dasgupta S. Thinking Beyond Disease Silos: Dysregulated Genes Common in Tuberculosis and Lung Cancer as Identified by Systems Biology and Machine Learning. OMICS : A JOURNAL OF INTEGRATIVE BIOLOGY 2024; 28:347-356. [PMID: 38856681 DOI: 10.1089/omi.2024.0116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
The traditional way of thinking about human diseases across clinical and narrow phenomics silos often masks the underlying shared molecular substrates across human diseases. One Health and planetary health fields particularly address such complexities and invite us to think across the conventional disease nosologies. For example, tuberculosis (TB) and lung cancer (LC) are major pulmonary diseases with significant planetary health implications. Despite distinct etiologies, they can coexist in a given community or patient. This is both a challenge and an opportunity for preventive medicine, diagnostics, and therapeutics innovation. This study reports a bioinformatics analysis of publicly available gene expression data, identifying overlapping dysregulated genes, downstream regulators, and pathways in TB and LC. Analysis of NCBI-GEO datasets (GSE83456 and GSE103888) unveiled differential expression of CEACAM6, MUC1, ADM, DYSF, PLOD2, and GAS6 genes in both diseases, with pathway analysis indicating association with lysine degradation pathway. Random forest, a machine-learning-based classification, achieved accuracies of 84% for distinguishing TB from controls and 83% for discriminating LC from controls using these specific genes. Additionally, potential drug targets were identified, with molecular docking confirming the binding affinity of warfarin to GAS6. Taken together, the present study speaks of the pressing need to rethink clinical diagnostic categories of human diseases and that TB and LC might potentially share molecular substrates. Going forward, planetary health and One Health scholarship are poised to cultivate new ways of thinking about diseases not only across medicine and ecology but also across traditional diagnostic conventions.
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He J, Xiong J, Huang Y. miR-29 as diagnostic biomarkers for tuberculosis: a systematic review and meta-analysis. Front Public Health 2024; 12:1384510. [PMID: 38807999 PMCID: PMC11130415 DOI: 10.3389/fpubh.2024.1384510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 04/30/2024] [Indexed: 05/30/2024] Open
Abstract
Background The timely diagnosis of tuberculosis through innovative biomarkers that do not rely on sputum samples is a primary focus for strategies aimed at eradicating tuberculosis. miR-29 is an important regulator of tuberculosis pathogenesis. Its differential expression pattern in healthy, latent, and active people who develop tuberculosis has revealed its potential as a biomarker in recent studies. Therefore, a systematic review and meta-analysis were performed for the role of miR-29 in the diagnosis of tuberculosis. Methods EMBASE, PubMed, CNKI, Web of Science, and Cochrane Library databases were searched utilizing predefined keywords for literature published from 2000 to February 2024.Included in the analysis were studies reporting on the accuracy of miR-29 in the diagnosis of tuberculosis, while articles assessing other small RNAs were not considered. All types of study designs, including case-control, cross-sectional, and cohort studies, were included, whether prospectively or retrospectively sampled, and the quality of included studies was determined utilizing the QUADAS-2 tool. Publication bias was analyzed via the construction of funnel plots. Heterogeneity among studies and summary results for specificity, sensitivity, and diagnostic odds ratio (DOR) are depicted in forest plots. Results A total of 227 studies were acquired from the various databases, and 18 articles were selected for quantitative analysis. These articles encompassed a total of 2,825 subjects, primarily sourced from the Asian region. Patient specimens, including sputum, peripheral blood mononuclear cells, cerebrospinal fluid and serum/plasma samples, were collected upon admission and during hospitalization for tuberculosis testing. miR-29a had an overall sensitivity of 82% (95% CI 77, 85%) and an overall specificity of 82% (95% CI 78, 86%) for detecting tuberculosis. DOR was 21 (95% CI 16-28), and the area under the curve was 0.89 (95% CI 0.86, 0.91). miR-29a had slightly different diagnostic efficacy in different specimens. miR-29a showed good performance in both the diagnosis of pulmonary tuberculosis and extrapulmonary tuberculosis. miR-29b and miR-29c also had a good performance in diagnosis of tuberculosis. Conclusion As can be seen from the diagnostic performance of miR-29, miR-29 can be used as a potential biomarker for the rapid detection of tuberculosis. Systematic Review Registration https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=461107.
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Affiliation(s)
- Jie He
- Clinical Medical College of Chengdu Medical College, Chengdu, Sichuan, China
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan, China
| | - Juan Xiong
- Clinical Medical College of Chengdu Medical College, Chengdu, Sichuan, China
- Emergency Department, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan, China
| | - Yuanyuan Huang
- Clinical Medical College of Chengdu Medical College, Chengdu, Sichuan, China
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan, China
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Gunasekaran H, Sampath P, Thiruvengadam K, Malaisamy M, Ramasamy R, Ranganathan UD, Bethunaickan R. A systematic review and meta-analysis of circulating serum and plasma microRNAs in TB diagnosis. BMC Infect Dis 2024; 24:402. [PMID: 38622570 PMCID: PMC11017603 DOI: 10.1186/s12879-024-09232-0] [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: 10/23/2023] [Accepted: 03/18/2024] [Indexed: 04/17/2024] Open
Abstract
BACKGROUND Tuberculosis (TB) ranks as the second leading cause of death globally among all infectious diseases. This problem is likely due to the lack of biomarkers to differentiate the heterogeneous spectrum of infection. Therefore, the first step in solving this problem is to identify biomarkers to distinguish the different disease states of an individual and treat them accordingly. Circulating microRNA (miRNA) biomarkers are promising candidates for various diseases. In fact, we are yet to conceptualize how miRNA expression influences and predicts TB disease outcomes. Thus, this systematic review and meta-analysis aimed to assess the diagnostic efficacy of circulating miRNAs in Latent TB (LTB) and Active Pulmonary TB (PTB). METHODS Literature published between 2012 and 2021 was retrieved from PubMed, Web of Science, Cochrane, Scopus, Embase, and Google Scholar. Articles were screened based on inclusion and exclusion criteria, and their quality was assessed using the QUADAS-2 tool. Funnel plots and forest plots were generated to assess the likelihood of study bias and heterogeneity, respectively. RESULTS After the screening process, seven articles were selected for qualitative analysis. The study groups, which consisted of Healthy Control (HC) vs. TB and LTB vs. TB, exhibited an overall sensitivity of 81.9% (95% CI: 74.2, 87.7) and specificity of 68.3% (95% CI: 57.8, 77.2), respectively. However, our meta-analysis results highlighted two potentially valuable miRNA candidates, miR-197 and miR-144, for discriminating TB from HC. The miRNA signature model (miR197-3p, miR-let-7e-5p, and miR-223-3p) has also been shown to diagnose DR-TB with a sensitivity of 100%, but with a compromised specificity of only 75%. CONCLUSION miRNA biomarkers show a promising future for TB diagnostics. Further multicentre studies without biases are required to identify clinically valid biomarkers for different states of the TB disease spectrum. SYSTEMATIC REVIEW REGISTRATION PROSPERO (CRD42022302729).
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Affiliation(s)
- Harinisri Gunasekaran
- Department of Immunology, ICMR-National Institute for Research in Tuberculosis, No.1. Mayor Sathyamoorthy Road, 600 031, Chetpet, Chennai, India
- University of Madras, Chennai, India
| | - Pavithra Sampath
- Department of Immunology, ICMR-National Institute for Research in Tuberculosis, No.1. Mayor Sathyamoorthy Road, 600 031, Chetpet, Chennai, India
- University of Madras, Chennai, India
| | - Kannan Thiruvengadam
- Department of Epidemiology Statistics, ICMR-National Institute for Research in Tuberculosis, Chennai, India
| | - Muniyandi Malaisamy
- Department of Health Economics, ICMR-National Institute for Research in Tuberculosis, Chennai, India
| | - Rathinasabapati Ramasamy
- Library and Information Center, ICMR-National Institute for Research in Tuberculosis, Chennai, India
| | - Uma Devi Ranganathan
- Department of Immunology, ICMR-National Institute for Research in Tuberculosis, No.1. Mayor Sathyamoorthy Road, 600 031, Chetpet, Chennai, India
| | - Ramalingam Bethunaickan
- Department of Immunology, ICMR-National Institute for Research in Tuberculosis, No.1. Mayor Sathyamoorthy Road, 600 031, Chetpet, Chennai, India.
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Massi MN, Hidayah N, Handayani I, Iskandar IW, Djannah F, Angria N, Halik H. microRNA hsa-miR-425-5p and hsa-miR-4523 expressions as biomarkers of active pulmonary tuberculosis, latent tuberculosis infection, and lymph node tuberculosis. Noncoding RNA Res 2023; 8:527-533. [PMID: 37555010 PMCID: PMC10405153 DOI: 10.1016/j.ncrna.2023.07.001] [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] [Received: 03/20/2023] [Revised: 06/25/2023] [Accepted: 07/14/2023] [Indexed: 08/10/2023] Open
Abstract
BACKGROUND Studies on miRNA highlight its significance as an immunomarker for several diseases, including tuberculosis. This study aimed to determine the difference between miR-425-5p and miR-4523 expressions in patients with active pulmonary TB (PTB), latent TB infection (LTBI), and lymph node TB (LNTB), whose diagnosis remains challenging. METHODS This case-control study was performed on blood samples obtained from 23 patients with PTB, 21 with LTBI, 21 with LNTB, and 25 healthy controls (HC). miRNA hsa-miR-425-5p and hsa-miR-4523 expression levels were measured by RT-qPCR. Statistical analyses were performed using SPSS version 25.0. RESULTS RT-qPCR showed that hsa-mir-425-5p and hsa-mir-4523 expression levels were significantly different among the four groups (PTB, LTBI, LNTB, and HCs). The hsa-mir-425-5p miRNA expression level in LNTB was higher than that in LTBI (p = 0.003). Meanwhile, the hsa-mir-4523 miRNA expression was downregulated in PTB and LNTB than in LTBI (p < 0.0001 and p = 0.015, respectively). The ROC analysis of a single sample showed that only mir-4523 could discriminate LTBI and HCs, with an AUC of 0.829 (p < 0.001). The ROC curve of each miRNA was further analyzed after logistic regression by adjusting for sex and age. The combination of both miRNAs was also analyzed. The model that analyzed the combination of both miRNAs after adjusting for age had the best performance in differentiating LNTB from LTBI, with an AUC of 0.97 (p < 0.001). CONCLUSION miRNA hsa-mir-425-5p was upregulated and miRNA hsa-mir-4523 was downregulated in PTB and LNTB than in LTBI.
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Affiliation(s)
- Muhammad Nasrum Massi
- Department of Clinical Microbiology, Faculty of Medicine, Universitas Hasanuddin, Makassar, 90245, South Sulawesi, Indonesia
- Hasanuddin University Medical Research Center Laboratory, Faculty of Medicine, Universitas Hasanuddin, Makassar, 90245, South Sulawesi, Indonesia
- Institute Research and Community Services Universitas Hasanuddin, Makassar, 90245, South Sulawesi, Indonesia
| | - Najdah Hidayah
- Research Center for Vaccine and Drugs, National Research and Innovation Agency (BRIN), Tangerang Selatan, 15314, Banten, Indonesia
| | - Irda Handayani
- Department of Clinical Pathology, Faculty of Medicine, Universitas Hasanuddin, Makassar, 90245, South Sulawesi, Indonesia
| | - Israini Wiyulanda Iskandar
- Institute Research and Community Services Universitas Hasanuddin, Makassar, 90245, South Sulawesi, Indonesia
| | - Fathul Djannah
- Department of Anatomy Pathology, Faculty of Medicine, Universitas Mataram, Mataram, 83126, Indonesia
| | - Nirmawati Angria
- Department of Biomedical Sciences, Faculty of Health Technology, Megarezky University, Makassar, 90234, South Sulawesi, Indonesia
| | - Handayani Halik
- Hasanuddin University Medical Research Center Laboratory, Faculty of Medicine, Universitas Hasanuddin, Makassar, 90245, South Sulawesi, Indonesia
- Department of Biomedical Sciences, Faculty of Health Technology, Megarezky University, Makassar, 90234, South Sulawesi, Indonesia
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Sampath P, Moorthy M, Menon A, Madhav L, Janaki A, Dhanapal M, Natarajan AP, Hissar S, Ranganathan UD, Ramaswamy G, Bethunaickan R. Downregulation of monocyte miRNAs: implications for immune dysfunction and disease severity in drug-resistant tuberculosis. Front Immunol 2023; 14:1197805. [PMID: 37457712 PMCID: PMC10345223 DOI: 10.3389/fimmu.2023.1197805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/02/2023] [Indexed: 07/18/2023] Open
Abstract
Background Monocyte miRNAs govern both protective and pathological responses during tuberculosis (TB) through their differential expression and emerged as potent targets for biomarker discovery and host-directed therapeutics. Thus, this study examined the miRNA profile of sorted monocytes across the TB disease spectrum [drug-resistant TB (DR-TB), drug-sensitive TB (DS-TB), and latent TB] and in healthy individuals (HC) to understand the underlying pathophysiology and their regulatory mechanism. Methods We sorted total monocytes including three subsets (HLA-DR+CD14+, HLA-DR+CD14+CD16+, and HLA-DR+CD16+cells) from peripheral blood mononuclear cells (PBMCs) of healthy and TB-infected individuals through flow cytometry and subjected them to NanoString-based miRNA profiling. Results The outcome was the differential expression of 107 miRNAs particularly the downregulation of miRNAs in the active TB groups (both drug-resistant and drug-sensitive). The miRNA profile revealed differential expression signatures: i) decline of miR-548m in DR-TB alone, ii) decline of miR-486-3p in active TB but significant elevation only in LTB iii) elevation of miR-132-3p only in active TB (DR-TB and DS-TB) and iv) elevation of miR-150-5p in DR-TB alone. The directionality of functions mediated by monocyte miRNAs from Gene Set Enrichment Analysis (GSEA) facilitated two phenomenal findings: i) a bidirectional response between active disease (activation profile in DR-TB and DS-TB compared to LTB and HC) and latent infection (suppression profile in LTB vs HC) and ii) hyper immune activation in the DR-TB group compared to DS-TB. Conclusion Thus, monocyte miRNA signatures provide pathological clues for altered monocyte function, drug resistance, and disease severity. Further studies on monocyte miRNAs may shed light on the immune regulatory mechanism for tuberculosis.
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Affiliation(s)
- Pavithra Sampath
- Department of Immunology, Indian Council of Medical Research (ICMR)-National Institute for Research in Tuberculosis (NIRT), Chennai, India
| | | | - Athul Menon
- TheraCUES Innovations Pvt. Ltd, Bangalore, India
| | | | - Aishwarya Janaki
- Department of Immunology, Indian Council of Medical Research (ICMR)-National Institute for Research in Tuberculosis (NIRT), Chennai, India
| | - Madhavan Dhanapal
- Department of Immunology, Indian Council of Medical Research (ICMR)-National Institute for Research in Tuberculosis (NIRT), Chennai, India
| | | | - Syed Hissar
- Department of Clinical Research, ICMR-National Institute of Research in Tuberculosis (NIRT), Chennai, India
| | - Uma Devi Ranganathan
- Department of Immunology, Indian Council of Medical Research (ICMR)-National Institute for Research in Tuberculosis (NIRT), Chennai, India
| | | | - Ramalingam Bethunaickan
- Department of Immunology, Indian Council of Medical Research (ICMR)-National Institute for Research in Tuberculosis (NIRT), Chennai, India
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Sengupta S, Pattanaik KP, Mishra S, Sonawane A. Epigenetic orchestration of host immune defences by Mycobacterium tuberculosis. Microbiol Res 2023; 273:127400. [PMID: 37196490 DOI: 10.1016/j.micres.2023.127400] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 04/09/2023] [Accepted: 05/02/2023] [Indexed: 05/19/2023]
Abstract
Being among the top 10 causes of adult deaths, tuberculosis (TB) disease is considered a major global public health concern to address. The human tuberculosis pathogen, Mycobacterium tuberculosis (Mtb), is an extremely competent and well-versed pathogen that promotes pathogenesis by evading the host immune systems through numerous tactics. Investigations revealed that Mtb could evade the host defense mechanisms by reconfiguring the host gene transcription and causing epigenetic changes. Although results indicate the link between epigenetics and disease manifestation in other bacterial infections, little is known regarding the kinetics of the epigenetic alterations in mycobacterial infection. This literature review discusses the studies in Mtb-induced epigenetic alterations inside the host and its contribution in the host immune evasion strategies. It also discusses how the Mtb-induced alterations could be used as 'epibiomarkers' to diagnose TB. Additionally, this review also discusses therapeutic interventions to be enhanced through remodification by 'epidrugs'.
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Affiliation(s)
- Srabasti Sengupta
- School of Biotechnology, Campus-11, KIIT Deemed to be University, Patia, Bhubaneswar 751024, India
| | - Kali Prasad Pattanaik
- School of Biotechnology, Campus-11, KIIT Deemed to be University, Patia, Bhubaneswar 751024, India
| | - Snehasish Mishra
- School of Biotechnology, Campus-11, KIIT Deemed to be University, Patia, Bhubaneswar 751024, India
| | - Avinash Sonawane
- Discipline of Biosciences and Biomedical Engineering, Indian Institutes of Technology Indore, Khandwa Road, Simrol, Indore 453552, India.
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Mukherjee S, Perveen S, Negi A, Sharma R. Evolution of tuberculosis diagnostics: From molecular strategies to nanodiagnostics. Tuberculosis (Edinb) 2023; 140:102340. [PMID: 37031646 PMCID: PMC10072981 DOI: 10.1016/j.tube.2023.102340] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/12/2023] [Accepted: 03/30/2023] [Indexed: 04/09/2023]
Abstract
Tuberculosis has remained a global concern for public health affecting the lives of people for ages. Approximately 10 million people are affected by the disease and 1.5 million succumb to the disease worldwide annually. The COVID-19 pandemic has highlighted the role of early diagnosis to win the battle against such infectious diseases. Thus, advancement in the diagnostic approaches to provide early detection forms the foundation to eradicate and manage contagious diseases like tuberculosis. The conventional diagnostic strategies include microscopic examination, chest X-ray and tuberculin skin test. The limitations associated with sensitivity and specificity of these tests demands for exploring new techniques like probe-based assays, CRISPR-Cas and microRNA detection. The aim of the current review is to envisage the correlation between both the conventional and the newer approaches to enhance the specificity and sensitivity. A significant emphasis has been placed upon nanodiagnostic approaches manipulating quantum dots, magnetic nanoparticles, and biosensors for accurate diagnosis of latent, active and drug-resistant TB. Additionally, we would like to ponder upon a reliable method that is cost-effective, reproducible, require minimal infrastructure and provide point-of-care to the patients.
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Affiliation(s)
| | - Summaya Perveen
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Anjali Negi
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Rashmi Sharma
- Infectious Diseases Division, CSIR- Indian Institute of Integrative Medicine, Jammu, 180001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Loganathan T, Doss C GP. Non-coding RNAs in human health and disease: potential function as biomarkers and therapeutic targets. Funct Integr Genomics 2023; 23:33. [PMID: 36625940 PMCID: PMC9838419 DOI: 10.1007/s10142-022-00947-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 01/11/2023]
Abstract
Human diseases have been a critical threat from the beginning of human history. Knowing the origin, course of action and treatment of any disease state is essential. A microscopic approach to the molecular field is a more coherent and accurate way to explore the mechanism, progression, and therapy with the introduction and evolution of technology than a macroscopic approach. Non-coding RNAs (ncRNAs) play increasingly important roles in detecting, developing, and treating all abnormalities related to physiology, pathology, genetics, epigenetics, cancer, and developmental diseases. Noncoding RNAs are becoming increasingly crucial as powerful, multipurpose regulators of all biological processes. Parallel to this, a rising amount of scientific information has revealed links between abnormal noncoding RNA expression and human disorders. Numerous non-coding transcripts with unknown functions have been found in addition to advancements in RNA-sequencing methods. Non-coding linear RNAs come in a variety of forms, including circular RNAs with a continuous closed loop (circRNA), long non-coding RNAs (lncRNA), and microRNAs (miRNA). This comprises specific information on their biogenesis, mode of action, physiological function, and significance concerning disease (such as cancer or cardiovascular diseases and others). This study review focuses on non-coding RNA as specific biomarkers and novel therapeutic targets.
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Affiliation(s)
- Tamizhini Loganathan
- Laboratory of Integrative Genomics, Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore- 632014, Tamil Nadu, India
| | - George Priya Doss C
- Laboratory of Integrative Genomics, Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore- 632014, Tamil Nadu, India.
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Davuluri KS, Chauhan DS. microRNAs associated with the pathogenesis and their role in regulating various signaling pathways during Mycobacterium tuberculosis infection. Front Cell Infect Microbiol 2022; 12:1009901. [PMID: 36389170 PMCID: PMC9647626 DOI: 10.3389/fcimb.2022.1009901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 10/03/2022] [Indexed: 11/22/2022] Open
Abstract
Despite more than a decade of active study, tuberculosis (TB) remains a serious health concern across the world, and it is still the biggest cause of mortality in the human population. Pathogenic bacteria recognize host-induced responses and adapt to those hostile circumstances. This high level of adaptability necessitates a strong regulation of bacterial metabolic characteristics. Furthermore, the immune reponse of the host virulence factors such as host invasion, colonization, and survival must be properly coordinated by the pathogen. This can only be accomplished by close synchronization of gene expression. Understanding the molecular characteristics of mycobacterial pathogenesis in order to discover therapies that prevent or resolve illness relies on the bacterial capacity to adjust its metabolism and replication in response to various environmental cues as necessary. An extensive literature details the transcriptional alterations of host in response to in vitro environmental stressors, macrophage infection, and human illness. Various studies have recently revealed the finding of several microRNAs (miRNAs) that are believed to play an important role in the regulatory networks responsible for adaptability and virulence in Mycobacterium tuberculosis. We highlighted the growing data on the existence and quantity of several forms of miRNAs in the pathogenesis of M. tuberculosis, considered their possible relevance to disease etiology, and discussed how the miRNA-based signaling pathways regulate bacterial virulence factors.
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