2. Academic Validation
  3. Eight antihypertensive peptides from the protein hydrolysate of Antarctic krill (Euphausia superba): Isolation, identification, and activity evaluation on human umbilical vein endothelial cells (HUVECs)

Eight antihypertensive peptides from the protein hydrolysate of Antarctic krill (Euphausia superba): Isolation, identification, and activity evaluation on human umbilical vein endothelial cells (HUVECs)

  • Food Res Int. 2019 Jul;121:197-204. doi: 10.1016/j.foodres.2019.03.035.
Yu-Qin Zhao 1,  Lun Zhang 1,  Jing Tao 1,  Chang-Feng Chi 2,  Bin Wang 3
Affiliations

Affiliations

  • 1 Zhejiang Provincial Engineering Technology Research Center of Marine Biomedical Products, School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China.
  • 2 National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, School of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, China. Electronic address: [email protected].
  • 3 Zhejiang Provincial Engineering Technology Research Center of Marine Biomedical Products, School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China. Electronic address: [email protected].
PMID: 31108740 DOI: 10.1016/j.foodres.2019.03.035
Abstract

In this report, eight antihypertensive Peptides were isolated from protein hydrolysate of Antarctic krill (Euphausia superba) using ultrafiltration and chromatography consecutively, and their sequences were identified as Trp-Phe, Tyr-Arg-Lys-Glu-Arg, Tyr-Arg-Lys, Val-Asp, Tyr-Lys-Asp, Phe-Gln-Lys, Phe-Ala-Ser, and Phe-Arg-Lys-Glu. The IC50 values of Trp-Phe (0.32 ± 0.05 mg/mL) and Phe-Ala-Ser (0.15 ± 0.02 mg/mL) on ACE inhibitory activity were significantly (p ≤ .05) lower than those of the other six Peptides. Furthermore, Trp-Phe, Tyr-Arg-Lys, Phe-Gln-Lys, and Phe-Ala-Ser did not only increase the nitric oxide (NO) concentration and decreased the content of endothelin-1 (ET-1) in the medium of human umbilical vein endothelial cells (HUVECs) in a dose-dependent manner after 24 h, but also significantly reversed the decreased production of NO in the presence of 0.5 μM norepinephrine and the effect of NE on ET-1 production. These results indicate that the isolated antihypertensive Peptides can correct the endothelial cell dysfunction induced by norepinephrine.

Keywords

Angiotensin converting enzyme (ACE); Antarctic krill (Euphausia superba); Antihypertensive activity; Endothelin-1 (ET-1); Nitric oxide (NO); Peptides.

Figures
Products