Cardiotrophin-1 is inversely associated with obesity in non-diabetic individuals

Area of Science:

• Metabolic research
• Endocrinology
• Epidemiology

Background:

• Cardiotrophin-1 (CT-1) is a key regulator of energy homeostasis, glucose, and lipid metabolism.
• Previous studies show inconsistent associations between CT-1 and human obesity, potentially due to confounding hyperglycemia.
• This study focuses on non-diabetic individuals to clarify the CT-1 and obesity relationship.

Purpose of the Study:

• To investigate the relationship between serum cardiotrophin-1 levels and overweight/obesity in a Chinese population without diabetes.
• To determine if CT-1 levels differ significantly across weight categories (normal, overweight, obese) in this cohort.

Main Methods:

• Cross-sectional study involving non-diabetic Chinese subjects categorized by weight status (normal, overweight, obese).
• Serum cardiotrophin-1 levels were measured and compared across groups.
• Multivariate linear regression analysis was used to identify factors associated with CT-1 levels, adjusting for covariates like age, gender, HOMA-IR, and lipid profiles.

Main Results:

• Serum cardiotrophin-1 levels were significantly lower in overweight (350.6 pg/ml) and obese (288.1 pg/ml) individuals compared to normal-weight subjects (447.9 pg/ml).
• A significant inverse trend (p < 0.001) was observed between CT-1 levels and increasing BMI categories.
• Multivariate analysis confirmed that overweight (beta = -338.7) and obesity (beta = -530.3) were negatively associated with CT-1, independent of other metabolic factors and lifestyle choices like smoking.

Conclusions:

• This study provides epidemiological evidence of an inverse association between cardiotrophin-1 levels and overweight/obesity in non-diabetic Chinese adults.
• Lower serum CT-1 concentrations are linked to higher body weight in the absence of diabetes.
• These findings highlight CT-1 as a potential biomarker or factor involved in the pathophysiology of obesity.