Karolinska Institutet researchers have reported that women and men with a predisposition to diabetes have different risk factors forecasting type 2 diabetes and prediabetes. They reported that in healthy women, low serum level of the adipose tissue protein adiponectin was an independent strong predictor of type 2 diabetes and prediabetes in the future. Conversely, in healthy men low serum level of the liver protein IGFBP-1, was an independent strong predictor of type 2 diabetes and prediabetes. This means that these proteins, which are measures of insulin sensitivity in adipose tissue (adiponectin) and liver and muscle (IGFBP-1), can predict whether one has a high risk of getting type 2 diabetes in ten years.
A previous study performed in Shanghai in 2016 showed gender differences in the same direction. In men with prediabetes the risk of future type 2 diabetes was significantly reduced if they increased their physical activity and muscle mass. In contrast, the same study showed that women with prediabetes must avoid increasing waist circumference and abdominal obesity or reducing large waist circumference to prevent type 2 diabetes.
"Our study explains why this gender difference was seen when it came to preventive lifestyles," explained Dr Kerstin Brismar, professor of diabetes research at the Department of Molecular Medicine and Surgery. “The proteins we studied in men and women increase with increased muscle mass and physical activity (IGFBP-1) and with reduced abdominal obesity and calorie restriction (adiponectin).”
It may also explain why regular exercise among abdominal obese women is not enough to reduce the risk of type 2 diabetes.
"We have previously shown that waist circumference was a strong independent predictor of type 2 diabetes in women and now we were able to show that it was linked to reduced production of adiponectin, a protein / hormone produced in the adipose tissue to, among other things, protect against cell stress.”
Other studies in both humans and mice have shown that both high normal levels of adiponectin and high normal levels of the liver protein IGFBP-1 protect against getting type 2 diabetes.
The findings were outlined in the paper, 'Adiponectin, IGFBP-1 and -2 are independent predictors in forecasting prediabetes and type 2 diabetes', published in Frontiers in Endocrinology.
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