Research Article: Adipose tissue IL-23 is associated with fasting blood glucose and HbA1c in overweight/obese individuals
Abstract:
IL-23, a proinflammatory cytokine, plays a role in the development of inflammatory diseases. However, the association between IL-23 expression in adipose tissue (AT) and glycemic changes in obesity remains unclear. This cross-sectional study aimed to examine the relationship of adipose tissue IL-23 (AT-IL-23) expression with other inflammatory mediators within the same compartment and insulin resistance markers fasting blood glucose (FBG) and glycated hemoglobin (HbA1c) in overweight/obese individuals. Fat biopsies were collected from 10 individuals with a body mass index (BMI) < 25kg/m2 and 51 individuals with a BMI > 25kg/m2 and were analyzed for IL-23 and other inflammatory markers using qRT-PCR. Inflammatory markers, including CD16, CD11c, CCR2, CCR5, TNF-?, IL-1?, IL-2, IL-12, CCL8, CCL19, and CXCL9, were positively correlated with IL-23 in the AT-compartment in the obesity context. Notably, AT-IL-23 was correlated positively with FBG, HbA1c, and homeostasis model assessment of insulin resistance (HOMA-IR), while negatively correlating with adiponectin. These findings suggest that AT-IL-23 is associated with metabolic inflammation and insulin resistance in obesity, suggesting it may be of interest for future biomarker studies.
Introduction:
Interleukin-23 (IL-23) is a heterodimeric cytokine with pro-inflammatory properties, crucial in the development and progression of several inflammatory diseases. The cytokine is predominantly secreted by activated immune cells such as monocytes, macrophages, and dendritic cells, which are present in peripheral tissues like the skin, the lining of the intestines, and the lungs ( 1 ). IL-23 can also be released by various other cells, including innate lymphoid cells, ?? T lymphocytes, and B cells ( 2 , 3 ). IL-23 is…
Read more