RT Journal Article
T1 Antioxidant, Angiotensin-Converting Enzyme Inhibitory Properties and Blood-Pressure-Lowering Effect of Rice Bran Protein Hydrolysates
A1 Piotrowicz, Inajara Beatriz Brose
A1 Garcés Rimón, Marta
A1 Moreno Fernández, Silvia
A1 Aleixandre De Artiñano, María Amaya
A1 Salas Mellado, Myriam
A1 Miguel Castro, Marta
AB This research aimed to investigate the biological properties of different hydrolysates derived from industrial and laboratory defatted rice bran proteins. Industrial and laboratory defatted rice bran protein concentrates were hydrolyzed with alcalase or flavorzyme. The degree of hydrolysis (DH), oxygen radical absorbance capacity (ORAC), reducing power, total phenolic compounds (TPC), and angiotensin-converting enzyme (ACE) inhibitory activity, were determined in the hydrolysates and the molecular fractions lower than 3 kDa. Systolic blood pressure (SBP) was measured using the tail-cuff method before and after oral administration of 80 mg/kg of different rice bran protein hydrolysate (RBPH) fractions lower than 3 kDa in male spontaneously hypertensive rats (SHR) and normotensive Wistar–Kyoto (WKY) rats. The highest values of in vitro antioxidant activity and TPC were observed in RBPH with alcalase defatted by industry (RBPH2A), and, in all cases, these bioactivities were higher in the molecular fractions lower than 3 kDa. Once again, fractions lower than 3 kDa obtained with alcalase showed a potent ACE inhibitory activity (RBPH1A<3). The administration of RBPH1A<3 caused a significant decrease in the SBP in SHR, where the maximum decrease was reached at 8 h after administration. SBP in WKY rats was not modified after the administration of RBPH1A<3. These results suggest that the rice bran protein hydrolysates obtained from industry after treatment with alcalase could be an interesting source of bioactive peptides, with potential action on hypertension and other related pathologies.
PB MDPI
SN 2304-8158
YR 2020
FD 2020-06-20
LK https://hdl.handle.net/20.500.14352/8366
UL https://hdl.handle.net/20.500.14352/8366
LA eng
NO Piotrowicz, I. B. B., Garcés Rimón, M., Moreno Fernández, S. et al. «Antioxidant, Angiotensin-Converting Enzyme Inhibitory Properties and Blood-Pressure-Lowering Effect of Rice Bran Protein Hydrolysates». Foods, vol. 9, n.o 6, junio de 2020, p. 812. DOI.org (Crossref), https://doi.org/10.3390/foods9060812.
NO Ministerio de Ciencia, Innovación y Universidades (España)/Fondo Europeo de Desarrollo Regional
NO Coordinación de la Formación del Personal de Nivel Superior (Brasil)
DS Docta Complutense
RD 29 abr 2025