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首页> 外文期刊>Journal of Functional Foods >Kinetics of in vitro enzyme inhibition and blood pressure-lowering effects of salmon (Salmo salar) protein hydrolysates in spontaneously hypertensive rats
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Kinetics of in vitro enzyme inhibition and blood pressure-lowering effects of salmon (Salmo salar) protein hydrolysates in spontaneously hypertensive rats

机译:自发性高血压大鼠中鲑鱼(Salmo salar)蛋白水解物的体外酶抑制和降血压作用的动力学

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A salmon protein hydrolysate (SPH) was produced from consecutive enzymatic hydrolysis of salmon muscle proteins with pepsin followed by trypsin + chymotrypsin. The SPH was separated into four (SF1-SF4) reverse-phase HPLC peptide fractions. The SF3 peptide fraction was the most active against both angiotensin I-converting enzyme (ACE) and renin activities during in vitro tests. SPH and SF3 inhibited ACE activity uncompetitively but renin inhibition was non-competitive. SPH and SF3 were orally administered (200 and 30 mg/kg body weight, respectively) to spontaneously hypertensive rats, followed by systolic blood pressure (SBP) measurements. The SF3 significantly (p < 0.05) reduced SBP by a maximum value of -42.1 +/- 3.4 mmHg when compared to -21.1 +/- 4.5 mmHg for SPH 2 h after oral administration. Mass spectrometry analysis showed some differences in the peptide ion composition, which may have contributed to the observed differences in SBP-reducing effects of SPH and SF3. (C) 2015 Elsevier Ltd. All rights reserved.
机译:鲑鱼蛋白水解物(SPH)是由鲑鱼肌蛋白先用胃蛋白酶随后是胰蛋白酶+胰凝乳蛋白酶进行酶水解产生的。将SPH分为四个(SF1-SF4)反相HPLC肽馏分。在体外测试期间,SF3肽级分对血管紧张素I转换酶(ACE)和肾素活性均最具活性。 SPH和SF3竞争性地抑制ACE活性,而肾素抑制则无竞争性。对自发性高血压大鼠口服给予SPH和SF3(分别为200和30 mg / kg体重),然后测量收缩压(SBP)。与口服后2小时SPH的-21.1 +/- 4.5 mmHg相比,SF3显着(p <0.05)将SBP降低了最大值-42.1 +/- 3.4 mmHg。质谱分析显示肽离子组成存在一些差异,这可能是导致观察到的SPH和SF3的SBP还原效果差异的原因。 (C)2015 Elsevier Ltd.保留所有权利。

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