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Abstract Title:

Antihypertensive effect of angiotensin I-converting enzyme inhibitory peptides from a sesame protein hydrolysate in spontaneously hypertensive rats.

Abstract Source:

Biosci Biotechnol Biochem. 2006 May;70(5):1118-26. PMID: 16717411

Abstract Author(s):

Daisuke Nakano, Kyoichi Ogura, Masazumi Miyakoshi, Fumie Ishii, Hideaki Kawanishi, Daisuke Kurumazuka, Chol-Jun Kwak, Kenji Ikemura, Masanori Takaoka, Shigeo Moriguchi, Taeko Iino, Aki Kusumoto, Sumio Asami, Hiroshi Shibata, Yoshinobu Kiso, Yasuo Matsumura

Abstract:

Sesame peptide powder (SPP) exhibited angiotensin I-converting enzyme (ACE) inhibitory activity, and significantly and temporarily decreased the systolic blood pressure (SBP) in spontaneously hypertensive rats (SHRs) by a single administration (1 and 10 mg/kg). Six peptide ACE inhibitors were isolated and identified from SPP. The representative peptides, Leu-Val-Tyr, Leu-Gln-Pro and Leu-Lys-Tyr, could competitively inhibit ACE activity at respective Ki values of 0.92 microM, 0.50 microM, and 0.48 microM. A reconstituted sesame peptide mixture of Leu-Ser-Ala, Leu-Gln-Pro, Leu-Lys-Tyr, Ile-Val-Tyr, Val-Ile-Tyr, Leu-Val-Tyr, and Met-Leu-Pro-Ala-Tyr according to their content ratio in SPP showed a strong antihypertensive effect on SHR at doses of 3.63 and 36.3 microg/kg, which accounted for more than 70% of the corresponding dosage for the SPP-induced hypotensive effect. Repeated oral administration of SPP also lowered both SBP and the aortic ACE activity in SHR. These results demonstrate that SPP would be a beneficial ingredient for preventing and providing therapy against hypertension and its related diseases.

Study Type : Animal Study

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Sayer Ji
Founder of GreenMedInfo.com

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