ABSTRACT
Purpose To produce enzymatic hydolysates with angiotensin Ⅰ-converting enzyme (ACE) inhibitory activity and antihypertensive activity from Acetes chinensis. Methods ACE inhibitory activity of the hydrolysates of Acetes chinensis by five commercial proteases were determined in vitro to select a protease as the enzyme used in the preparation of enzymatic hydrolysate of Acetes chinensis, and orthogonal trials were employed to optimize its hydrolysis parameters, spontaneously hypertensive rats (SHR) were used to assess in vivo the hypotensive effects of hydrolysate under optimized condition. Results The hydrolysate with IC50 being0.65 mg/ml was obtained under the optimized condition of pH 2.4, 41℃, 3 h hydrolysis time, 3% enzyme/substrate ratio (E/S) and 8 % substrate concentration, and a recorded SBP reduction of 3 886.3 Pa (29mmHg) at 4 h after administration (1.0 g/kg BW) was observed. Conclusion Peptic hydrolysate of Acetes chinensis shows significant ACE inhibitory activity and antihypertensive activity.
ABSTRACT
Objective:To investigate the antihypertensive effects of mung bean protein,peanut protein and rice protein alcalase hydrolysates with in vitro angiotensin I-converting enzyme(ACE) inhibitory activity in spontaneously hypertensive rats(SHR) . Method:The impact of digestive proteases on ACE inhibitory activity of hydrolysates of peanut,mung bean and rice protein isolates were evaluated under simulated gastrointestinal digestion and their antihypertensive effects were investigated in SHR after single oral administration. Results:All of three kinds of protein hydrolysates showed antihypertensive activities after single oral administration at a dose of 600 mg/kg bw,most potent in mung bean protein while least in peanut protein. There were no significant changes in the heart rate of SHR after oral administration of protein hydrolysates. Conclusion:Mung bean protein,peanut protein and rice protein hydrolysates all showed antihypertensive activity,but their potent inhibitory activities on ACE did not correlate with their antihypertensive activities found in SHR.