Investigating the Link Between Vitamin E Status and Tuberculosis Risk in Peru

Overview of Tuberculosis

Researchers in Peru are exploring the potential connection between pre-existing Vitamin E levels and the risk of developing tuberculosis (TB). In 2015, there were approximately 10.4 million TB cases globally, resulting in 1.8 million deaths. Individuals residing with a TB patient, particularly those with micronutrient deficiencies, face heightened risk. Despite this, limited research has focused on the relationship between Vitamin E status and TB susceptibility.

Understanding Tuberculosis

Tuberculosis, commonly referred to as TB, is caused by the bacterium Mycobacterium tuberculosis. Symptoms include fever, night sweats, persistent cough, hemoptysis (coughing up blood), chest pain, and weight loss. While TB is treatable with antibiotics or anti-TB medications, untreated cases can lead to severe complications affecting the lungs, kidneys, and liver, potentially resulting in death. Although TB spreads through airborne droplets, it is not easily contracted. Vulnerable populations include infants, the elderly, individuals with weakened immune systems, and those who are malnourished. The highest infection risk is often found among individuals living in close quarters with infected persons.

The Role of Vitamin E in Immune Function

Vitamin E is vital for protecting immune cells from oxidative damage. Studies using animal models suggest that a deficiency in Vitamin E can weaken cell-mediated immune responses. Human research has indicated that Vitamin E can enhance immune function by promoting T-cell differentiation and proliferation. Additionally, there is evidence linking various micronutrient deficiencies to active TB. However, research examining the specific relationship between Vitamin E levels and TB risk from household contacts is sparse.

Recent Research Findings

A recent study published in The Journal of Nutrition assessed the relationship between baseline plasma concentrations of three Vitamin E isomers—α-tocopherol, γ-tocopherol, and δ-tocopherol—and the risk of developing TB. This case-control study was conducted within a longitudinal cohort of household contacts of pulmonary TB cases in Lima, Peru. The study focused on individuals who developed active TB at least two weeks after a primary case’s diagnosis, matching each case with four controls based on age and gender.

Implications of Vitamin E Deficiency

The findings indicated that Vitamin E deficiency significantly increases the risk of contracting TB from household members with the disease. Based on these results, the researchers recommend evaluating Vitamin E status in these individuals and potentially implementing Vitamin E supplementation as a strategy to reduce TB transmission.

Conclusion

This research highlights the importance of understanding micronutrient status in the context of infectious diseases like tuberculosis. Addressing Vitamin E deficiency may offer a novel approach to TB prevention among high-risk populations.

Written by Debra A. Kellen, PhD

Reference

Aibana, O., Franke, M. F., Huang, C. C., Galea, J. T., Calderon, R., Zhang, Z., … & Lecca, L. (2018). Vitamin E Status Is Inversely Associated with Risk of Incident Tuberculosis Disease among Household Contacts. The Journal of Nutrition, 148(1), 56-62.