Adolescent Life-Event Stress in Boys Is Associated with Elevated IL-6 and Hepcidin but Not Hypoferremia

作者：Augustine Little Flower; Nair Krishnapillai Madhavan^*; Rao Sylvia Fernandez; Rao Mendu Vishnuvardhana; Ravinder Punjal; Balakrishna Nagalla; Laxmaiah Avula; Vazir Shahnaz

来源：Journal of the American College of Nutrition, 2014, 33(5): 354-362.

DOI：10.1080/07315724.2013.875417

• hepcidin
• adolescents
• inflammation
• India
• path analysis
• IL-6
• iron
• stress

Objective: The link between stress-related increases in inflammatory markers, hepcidin, and iron status are poorly understood, especially in developing countries like India. The aim of the study was to examine the relationship between adolescent life-event stress (ALES), inflammatory markers, and its association with hepcidin and biomarkers of iron status among adolescent boys.
Methods: Data pertaining to a subsample of 145 participants from a cross-sectional, school-based study recruiting 370 adolescent boys aged 15-19years, from 5 schools in Hyderabad, India, were analyzed. Stress was assessed using the ALES scale, psychological distress by the General Health Questionnaire-2 (GHQ-12), and approach and avoidance coping using the Coping Strategies Scale. Biomarkers of iron and concentrations of other micronutrients, hepcidin, IL-6 and C-reactive protein (CRP) in plasma were analyzed. Data were subjected to regression, path analyses, and analysis of covariance (ANCOVA).
Results: ALES was a significant predictor of interleukin (IL)-6 (beta = 0.196, p = 0.012), CRP (beta = 0.217, p = 0.010), and log hepcidin (beta = 0.228, p = 0.006). Hepcidin correlated significantly (p < 0.001) with IL-6 (r = 0.344) and CRP (r = 0.370) but not with the biomarkers of iron status. Path analysis showed that the model had an acceptable fit, with a root mean square error of approximation of 0.019, 90% confidence interval (CI) of 0.00-0.074, comparative fit index of 0.988, chi-square p = 0.393, and chi-square/df of 1.053.
Conclusions: Adolescent life-event stress is associated with elevated IL-6 and hepcidin concentration but not hypoferremia. These findings may help in iron supplementation programs for tackling anemia.

• 出版日期2014-9-3