Portal de Periódicos da CAPES

Effect of Simulated Gastrointestinal Digestion on the Antihypertensive Properties of ACE-Inhibitory Peptides Derived from Ovalbumin

2006; American Chemical Society; Volume: 54; Issue: 3 Linguagem: Inglês

10.1021/jf051101p

1520-5118

Marta Miguel, M. A. Aleixandre, Maria‐Helena Ramos, Rosina López‐Fandiño,

Biochemical effects in animals

Food-derived bioactive peptides with ACE-inhibitory properties are receiving special attention due to their beneficial effects in the treatment of hypertension. In this work we evaluate the impact of a simulated gastrointestinal digestion on the stability and activity of two bioactive peptides that derive from ovalbumin by enzymatic hydrolysis, YAEERYPIL and RADHPFL. These peptides possess in vitro ACE-inhibitory activity and antihypertensive activity in spontaneously hypertensive rats (SHR). The results showed that YAEERYPIL and RADHPFL were susceptible to proteolytic degradation after incubation with pepsin and a pancreatic extract. In addition, their ACE-inhibitory activity in vitro decreased after the simulated digestion. The antihypertensive activity on SHR of the end products of the gastrointestinal hydrolysis, YAEER, YPI, and RADHP, was evaluated. The fragments YPI and RADHP significantly decreased blood pressure, 2 h after administration, at doses of 2 mg/kg, but they probably did not exert their antihypertensive effect through an ACE-inhibitory mechanism. It is likely that RADHP is also the active end product of the gastrointestinal digestion of the antihypertensive peptides FRADHPFL (ovokinin) and RADHPF (ovokinin 2-7). Keywords: Ovalbumin; ACE-inhibitory peptides; gastrointestinal digestion; antihypertensive activity; spontaneously hypertensive rats