Exploring the effects of vasoactive constituents in large cardamom: implications for the anti-hypertensive effect via...

Area of Science:

• Biochemistry
• Pharmacology
• Cardiovascular Science

Background:

• Endothelial dysfunction, characterized by reduced nitric oxide (NO) and eNOS expression, is a key factor in cardiovascular diseases (CVDs).
• Large cardamom possesses known antihypertensive properties, attributed to its potential to increase NO levels and antioxidant capacity.

Purpose of the Study:

• To investigate the molecular mechanisms underlying the antihypertensive effects of large cardamom.
• To identify specific constituents of large cardamom that may restore endothelial function.
• To elucidate the role of these constituents in the GTPCH-1/BH4/eNOS pathway.

Main Methods:

• Molecular docking of large cardamom constituents with eNOS-associated targets (GTPCH-1, DHFR).
• In vitro assessment of endothelial damage models induced by L-NAME and fructose.
• Measurement of nitric oxide metabolites (NOx), tetrahydrobiopterin (BH4), GTPCH-I expression, and superoxide dismutase (SOD) activity.

Main Results:

• Cyanidin-3-O-glucoside and petunidin-3-O-glucoside demonstrated significant restoration of vascular markers in L-NAME and fructose-induced endothelial damage models.
• These phytoconstituents were found to activate the GTPCH-BH4-eNOS pathway.
• Upregulation of SOD activity and NO expression was observed, contributing to the maintenance of endothelial integrity.

Conclusions:

• The antihypertensive effects of large cardamom are likely mediated by its constituents, cyanidin-3-O-glucoside and petunidin-3-O-glucoside.
• These compounds enhance endothelial NO release through the eNOS pathway, offering a potential therapeutic strategy for CVDs.
• Targeting the GTPCH-BH4-eNOS pathway with these phytoconstituents represents a promising approach for managing hypertension and improving endothelial function.