Astragalus polysaccharide (APS) improves the immune function in diet-induced obese (DIO) mice.

Obesity is a major health hazard, suppressing the immune system and complicating inflammatory symptoms treatment. Traditional Chinese medicine emphasizes holistic principles and syndrome-based diagnosis/therapy. Its primary focus is on enhancing overall well-being, rather than solely aiming for weight loss. Astragalus polysaccharide (APS), extracted from Astragalus membranaceus, has demonstrated promising effects in enhancing the health status of obese individuals. Therefore, this study employed DIO mouse model to explore the immunomodulatory effects of APS in obese mice. The findings revealed a dose-dependent effect of APS on obesity prevention in DIO mice. Specifically, a 4% concentration of APS significantly reduced body weight, whereas a 2% concentration tended to increase it. Furthermore, APS effectively modulated blood glucose and lipid profiles, demonstrating varying degrees of improvement in blood glucose and blood lipid-related factors. Notably, APS also facilitated the reactivation of suppressed immune function in obese mice, regulating a range of immunological variables associated with obesity and thereby maintaining homeostasis. In conclusion, the functional benefits of APS were dose-related, with a 4% concentration demonstrating promising results in obesity prevention and immune system modulation. These findings provide a potential reference for treating inflammatory conditions associated with obesity, contributing academic understanding of obesity management and immunomodulation.