Polygonatum sibiricum (Huang Jing) polysaccharide reduces diabetic cardiomyopathy through increasing cyclic guanosine...

Area of Science:

• Cardiology
• Endocrinology
• Pharmacology

Background:

• Diabetic cardiomyopathy (DCM) is a serious complication of diabetes with high mortality.
• The therapeutic potential of Polygonatum sibiricum polysaccharide (PSP) for DCM is currently unknown.
• PSP exhibits known antioxidant properties beneficial for diabetes-related conditions.

Purpose of the Study:

• To investigate the therapeutic effects of PSP on DCM in a mouse model.
• To determine if PSP can alleviate cardiac dysfunction and stress in diabetic mice.

Main Methods:

• DCM was induced in mice via high-fat diet and streptozotocin injection.
• Mice received oral PSP treatment for three weeks.
• Western blotting analyzed key protein expressions related to ER stress and cardiac function.

Main Results:

• PSP treatment reduced body weight and blood glucose levels in diabetic mice.
• PSP improved cardiac function and alleviated endoplasmic reticulum (ER) and oxidative stress.
• PSP inhibited phosphodiesterase type 5 (PDE5), reactivating cyclic guanosine monophosphate (cGMP) signaling and reducing cardiac dysfunction.

Conclusions:

• PSP demonstrates protective effects on diabetic myocardium by inhibiting ER stress.
• PSP ameliorates DCM in mice by reducing ER and oxidative stress and enhancing cGMP-PKG signaling.
• PSP shows potential as a therapeutic agent for managing diabetic cardiomyopathy.