Men and women have different fat distribution, and this can affect the risk of cardiovascular disease and type 2 diabetes in men. Research from Karolinska Institutet in Stockholm, Sweden, has shown that obese men with type 2 diabetes exhibit higher insulin resistance and different levels of gene expression compared to women. Men are more likely to develop complications related to both type 1 and type 2 diabetes. Evidence suggests that the breakdown of fat cells by lipolysis leads to raised levels of free fatty acids, contributing to inflammation and insulin resistance. A gene called IRS1 may play a role in the higher insulin resistance in men with obesity and type 2 diabetes.
The study involved 2,344 women and 787 men with stable weight for at least 3 months. Blood tests measuring circulating fatty acids and insulin levels in participants indicated higher levels in men with obesity compared to women. Analysis of subcutaneous fat samples from a subset of participants showed that women with obesity had 10 times higher insulin sensitivity in adipose tissue compared to men. Additionally, fat cells from men showed twice the rate of lipolysis compared to women with obesity.
The researchers also explored gene expression in the fat cells of men and women with obesity. They found that the gene encoding IRS1 was expressed less in men with obesity than in women. Differences in hormone profiles between men and women may affect metabolic pathways in adipose tissue, leading to the observed sex differences in insulin resistance. Women typically put on more weight before developing diabetes, leading to earlier diagnosis in men and different insulin resistance profiles between the sexes.
Men with type 2 diabetes have been shown to be at a higher risk of developing complications related to the condition compared to women. A study in Australia revealed that men were at an increased risk of cardiovascular disease, lower limb complications, kidney complications, and diabetic retinopathy compared to women, regardless of how long they had the condition. This suggests that men and women may benefit from different treatment pathways, with some medications being more effective in women than men.
The authors of the study suggest that insulin resistance in men with obesity could be targeted with specific interventions to prevent type 2 diabetes, although more research is needed. Differences in fat distribution and behavior between men and women need further investigation to develop tailored treatment approaches. It is important to diversify participant cohorts in diabetes studies to understand how findings may apply to different populations.
In conclusion, the research highlights the importance of understanding the sex differences in fat distribution and insulin resistance in the context of type 2 diabetes. Tailoring treatment approaches to address these differences could improve outcomes for both men and women with the condition. Further research is needed to explore the underlying mechanisms and develop more precise therapies for individuals based on their sex and gender.
