Antihypertensive Mechanism of a Peptide-Enriched Soy Sauce-Like Seasoning: The Active Constituents and Its Suppressive Effect on Renin-Angiotensin-Aldosterone System
| Autor: | Takeharu Nakahara, Katsutoshi Sugimoto, Hitomi Yamaguchi, Atsushi Sano, Hiroshi Katayama, Riichiro Uchida |
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| Rok vydání: | 2011 |
| Předmět: |
Male
Proteases Administration Oral Angiotensin-Converting Enzyme Inhibitors Peptide Pharmacology Inhibitory postsynaptic potential Renin-Angiotensin System chemistry.chemical_compound Spontaneously hypertensive rat Gastrointestinal Agents Oral administration Rats Inbred SHR Renin–angiotensin system Animals Nicotianamine Aldosterone Antihypertensive Agents chemistry.chemical_classification Rats Inbred Dahl Soy Foods Dipeptides Rats Enzyme chemistry Biochemistry Fermentation Peptides Food Science |
| Zdroj: | Journal of Food Science. 76:H201-H206 |
| ISSN: | 0022-1147 |
| DOI: | 10.1111/j.1750-3841.2011.02362.x |
| Popis: | We previously reported that a peptide-enriched soy sauce-like seasoning called fermented soybean seasoning (FSS) demonstrated antihypertensive effects both in spontaneously hypertensive rats (SHR) and Dahl salt-sensitive rats. Angiotensin I-converting enzyme (ACE) inhibitory substances (9 kinds of dipeptides and a nicotianamine) were identified from FSS. In the present study, we clarified the mechanisms underlying the antihypertensive effects of FSS in SHR. FSS was divided into the nicotianamine fraction and the peptide fraction. The peptide fraction was found to exert a more prevalent antihypertensive effect than the nicotianamine fraction in SHR. Among the peptides, we identified Gly-Tyr and Ser-Tyr as the 2 primary substances in FSS that contributed to the antihypertensive effect in SHR. These peptides were neither degraded by acid nor gastrointestinal proteases, and were absorbed into the circulating blood. FSS (2000 mg/kg) exerted ACE inhibitory activity in the lung of rats and provided a decrease (P= 0.0067) in the level of serum aldosterone after a single oral administration in SHR, resulting in the antihypertensive effect. The antihypertensive mechanism was found to be similar to therapeutic ACE inhibitors and other food-derived ACE inhibitory peptides, which are in wide use and are recognized as safe. |
| Databáze: | OpenAIRE |
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