[Correlation between serum microRNA-122 and insulin resistance in obese children]

Area of Science:

• Pediatric Endocrinology
• Metabolic Syndrome Research
• Molecular Biology

Background:

• Obesity in children is a growing concern associated with metabolic complications.
• Insulin resistance is a key factor in the development of type 2 diabetes and cardiovascular disease.
• MicroRNAs (miRNAs) are emerging as potential biomarkers and regulators of metabolic health.

Purpose of the Study:

• To investigate the association between serum microRNA-122 (miR-122) levels and insulin resistance in a cohort of obese children.
• To compare miR-122 levels in obese children versus healthy, normal-weight controls.

Main Methods:

• A case-control study involving 47 severely obese children and 45 healthy children (aged 7-14 years).
• Measurements included anthropometrics (height, weight, BMI, WHR), metabolic markers (FBG, FINS, TG, TC, FFA), IL-6, and serum miR-122.
• Insulin resistance was assessed using the Homeostatic Model Assessment for Insulin Resistance (HOMA-IR).

Main Results:

• Obese children exhibited significantly higher levels of height, weight, BMI, WHR, FINS, HOMA-IR, TG, FFA, IL-6, and miR-122 compared to controls (P<0.05).
• Serum miR-122 levels showed a positive correlation with fasting insulin (FINS), HOMA-IR, and IL-6 (r=0.408, 0.442, 0.464, respectively; P<0.05).
• A linear regression analysis indicated a relationship between miR-122 changes and IL-6 levels (b'=0.318, P<0.05).

Conclusions:

• Elevated serum miR-122 levels are potentially associated with insulin resistance in obese children.
• These findings highlight miR-122 as a possible biomarker for insulin resistance in pediatric obesity.
• Further research is warranted to elucidate the precise mechanistic role of miR-122 in this context.