Biodegradable copper-containing mesoporous microspheres loaded with ginsenoside Rb1 for infarcted heart repair.

Area of Science:

• Biomaterials Science
• Cardiovascular Research
• Drug Delivery Systems

Background:

• Myocardial infarction (MI) lacks effective repair therapies.
• Ginsenoside Rb1 (GRb1) shows potential for myocardial protection and regeneration.
• GRb1's efficacy is limited by poor bioavailability and angiogenesis.

Purpose of the Study:

• To enhance the therapeutic potential of GRb1 for MI treatment.
• To develop a novel drug delivery system using mesoporous basic copper carbonate (BCC) microspheres.
• To investigate the synergistic effects of GRb1 and copper ions (Cu2+) on myocardial repair.

Main Methods:

• Loading GRb1 onto BCC microspheres (BCC@GRb1).
• In vitro cell experiments assessing anti-cardiomyocyte apoptosis and endothelial cell angiogenesis.
• In vivo studies using a mouse model of MI to evaluate cardiac function, infarct size, and vascularization.

Main Results:

• GRb1 and Cu2+ exhibited synergistic effects on reducing cardiomyocyte apoptosis and promoting angiogenesis.
• BCC@GRb1 treatment significantly improved cardiac function in MI mice.
• BCC@GRb1 reduced infarct area, myocardial hypertrophy, and cardiomyocyte apoptosis, while increasing vascularization.

Conclusions:

• Combining GRb1 with BCC microspheres enhances its therapeutic efficacy for myocardial infarction.
• The developed drug delivery system offers a promising strategy for myocardial regeneration.
• This approach represents a novel therapeutic avenue for ischemic heart disease treatment.