Vitamin D receptor gene polymorphism and vitamin D supplementation on clinical/ treatment outcome in tuberculosis: current and future perspectives.

INTRODUCTION: Tuberculosis (TB) is a transnational public health concern, which requires more precise treatment strategies than the existing approaches. Vitamin D modulates the inflammatory and immune response to the disease. Robust evidence shows that vitamin D deficiency and its receptor gene polymorphism influence the susceptibility to TB and the outcome of the anti-tubercular treatment (ATT). However, in the different populations, these findings were inconsistent and even contradictory. AREAS COVERED: The current review focuses on the association between vitamin D receptor (VDR) gene polymorphism with the risk of development of TB disease and response to the ATT. Additionally, it reviews various systematic reviews and meta-analyses on the impact of vitamin D supplements on both clinical and treatment outcomes in TB patients. EXPERT OPINION: Although the majority of the findings rule out the benefits of the supplementation, sufficient evidence is available to warrant larger epidemiological research that should be aimed to generate possible interaction among the VDR polymorphism, vitamin D status, and the outcome in TB. We conclude that establishing such an association in different ethnic populations will help design nutrigenomics- or pharmacogenomics-based vitamin D supplementation to develop a personalized medicine approach to flatten the curve of TB disease.

Effect of Vitamin D Supplementation in Type 2 Diabetes Patients with Tuberculosis: A Systematic Review.

BACKGROUND: Diabetes mellitus (DM) and tuberculosis (TB) have been recognized as reemerging epidemics, especially in developing countries. Among all the risk factors, diabetes causes immunosuppression, increasing the risk of active TB three times. Vitamin D has been found as a link between DM-TB co-morbidity. OBJECTIVE: Vitamin D affects the immune response, suppresses Mycobacterium tuberculosis (Mtb) growth, and affects insulin secretion. The present systematic review determines the effect of vitamin D supplementation on clinical and therapeutic outcomes of DM-TB patients. METHOD: A comprehensive literature search was carried out in PubMed, Cochrane, Web of Science, and Scopus database to determine eligible studies from inception to January 2021. Out of the 639 articles retrieved, three randomized controlled trials (RCTs) were included in the systematic review. RESULT: The effect of vitamin D3 or oral cholecalciferol supplementation was assessed on outcomes, such as duration to sputum smear conversion, TB scores improvement, change in glycemic parameters, including HbA1c, FBS, and PLBS, and laboratory parameters, such as Hb, ESR, and CRP. Duration of sputum smear conversion was decreased by two weeks in the vitamin D3 supplemented group in two studies. TB score improvement and changes in glycemic parameters were inclined towards supplemented group; however, they were not significant. CONCLUSION: The overall effect of vitamin D3 supplementation on TB patients with DM was not significant. Further studies are required in the future examining the effect of supplementation on outcomes in this population.

Implications of traditional medicine in the treatment of Hepatitis A in Kerala.

INTRODUCTION: The recent outbreaks of Hepatitis A in Kerala are suggestive of decrease in endemicity as most adults were not exposed during the childhood. In allopathic system of medicine, there is no established treatment for Hepatitis A and hence most people tend to rely on the alternate systems of medicine. The study was aimed at identifying the burden of Hepatitis A in the locality and to uncover the degree of dependence of the people on traditional systems of medicine. METHODS: The study spanned over 7 months and was conducted in Malappuram district of Kerala. A simple questionnaire having closed-ended questions was prepared and circulated among the physicians in the area. Demographic and other relevant details were obtained from the patients and the medicine system relied on was scrutinized. RESULTS: Of the 348 patients enrolled, majority of the patients were between the age of 10-30 years. The study revealed that females were more affected than males. Similarly people in rural areas were greater than those from urban areas. Most patients (73.28%) relied on Ayurvedic treatment after one week of onset of symptoms. DISCUSSION AND CONCLUSION: The preparations such as triphala which has great efficacy in treatment has to be further studied to establish the pathways and mechanism through which it acts. A collaborative effort between government, modern medicine and alternate medicine system can be highly effective in reducing the outbreaks of such epidemics through proper preventive and therapeutic strategies.