Biological effects of casein-derived tripeptide powders are not affected by fermentation process

被引:9
作者
Jakala, Pauliina [1 ]
Turpeinen, Anu M. [2 ]
Rajakari, Kirsi [2 ]
Korpela, Riitta [1 ,2 ]
Vapaatalo, Heikki [1 ]
机构
[1] Univ Helsinki, Inst Biomed, FIN-00014 Helsinki, Finland
[2] Valio Ltd, R&D, Valio 00039, Finland
关键词
SPONTANEOUSLY HYPERTENSIVE-RATS; LONG-TERM INTAKE; NORMAL BLOOD-PRESSURE; I-CONVERTING-ENZYME; LACTOBACILLUS-HELVETICUS; BIOACTIVE PEPTIDES; MILD HYPERTENSION; NITRIC-OXIDE; SOUR MILK; ASSAY;
D O I
10.1016/j.idairyj.2009.11.017
中图分类号
TS2 [食品工业];
学科分类号
100403 [营养与食品卫生学];
摘要
Milk casein-derived biologically active tripeptides isoleucine-proline-proline and valine-proline-proline have shown antihypertensive effects both in animal and clinical studies. Contradictory findings from clinical intervention studies may be related to different manufacturing processes. The present study aimed to compare cardiovascular effects of two different tripeptide powders in spontaneously hypertensive rat (SHR). Rats received tripeptide powders produced either by Lactobacillus helveticus fermentation (A) or Lb. helveticus plus proline specific endoprotease (B) in drinking fluid for 8 weeks. Systolic blood pressure was recorded weekly. At the end, blood and tissue samples were collected and arterial responses studied. Blood pressure was 13.6 and 14.2 mmHg lower in the groups A and B, respectively, versus the water group (P < 0.01). Vascular responses of aorta and mesenteric artery did not differ between the groups. Both tripeptide products increased urinary cGMP (P < 0.001) and decreased albumin (P < 0.05). The fermentation process did not influence the cardiovascular effects of the tripeptide powders. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:366 / 370
页数:5
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