. Angiotensin I-converting enzyme plays a crucial role in the regulation of blood pressure, as well as for the fluid and salt balance in mammals. It catalyzes the formation of angiotensin II, a strong vaso-constricting octapeptide, from angiotensin I, and also inactivates bradykinin, which causes the blood vessels to dilate and hence lowers blood pressure. Therefore, ACE inhibition may lead to a reduction in blood pressure). The synthetic ACE inhibitors,such as captopril and enalapril, are generally used in the treatment of primary hypertension.However, they have certain undesirable side effects, includ-ing coughing, skin discomfort, impaired renal function, and espe-cially excessively low blood pressure, i.e. hypotension.Therefore, natural ACE inhibitors without side ef-fect, as alternatives to synthetic drugs, have awoken the attention of both medical and food researchers. Enzymatic proteolysis can release bioactive peptides from food proteins. Recently, fish, oyster, gelatin and maize protein have been renin-angiotensin systems within organs, such as blood vessels,kidney and lung, differences in the actions of ACE inhibitors have begun to become apparent, especially the differences in the distri-bution of these drugs into various tissues .Whether the obtained whey protein-derived peptides in our pri-mary study affect the ACE-activity in different tissues of SHRs still needs further work.
The aim of the present study was to investigate the antihyper-tensive and ACE-inhibitory effects of orally administered whey protein hydrolysate on spontaneously hypertensive rats. The corre-lations between tissue ACE-inhibitory activities and blood pressure were also evaluated
đang được dịch, vui lòng đợi..