Abstract
Background: Many fishes have been known for their good nutritional effects especially in the cardiovascular aspect. Some specific fish peptides have anti-hypertensive effects.
Objective: In the present study, we hypothesized that the hexapeptide (MEVFVP) from flounder fish muscle can be a potent antihypertensive peptide, therefore, decided to perform this experiment.
Methods: The peptide MEVFVP from flounder fish muscle (40 mg/kg) and vehicle were administered per os to spontaneously hypertensive rats (SHRs) (SHR-M and SHR-C, respectively). Additionally, plasma MEVFVP was measured serially before and after its oral administration to Sprague Dawley rats.
Results: Blood pressures (BPs), especially systolic BP, in SHR rats were decreased around 3-6 hours after MEVFVP administration. Compared with SHR-C rats, endothelin-1 (ET-1) mRNA expression in multiple tissues, and plasma levels of ET-1, angiotensin II, and aldosterone were lower in SHR-M rats, whereas the phosphorylation of AMP-activated protein kinase (AMPK) was increased in the kidney of SHR-M rats. The administered peptide was not detected in rat plasma, while ex vivo incubation of the peptide in rat plasma caused its rapid degradation within minutes.
Conclusion: Our results show that the MEVFVP has an antihypertensive effect by regulating renin- angiotensin-aldosterone system, ET-1 and AMPK despite its limited bioavailability.
Keywords: Spontaneously hypertensive rat, antihypertensive agent, endothelin-1, renin-angiotensin system, aldosterone, angiotensin II, SHR.
Graphical Abstract
[http://dx.doi.org/10.3390/nu10111738] [PMID: 30424533]
[http://dx.doi.org/10.1016/j.regpep.2003.11.005] [PMID: 14759563]
[http://dx.doi.org/10.1002/(SICI)1097-0029(20000515)49:4<346::AID-JEMT3>3.0.CO;2-B] [PMID: 10820518]
[http://dx.doi.org/10.1080/10408398.2012.753866] [PMID: 25569557]
[http://dx.doi.org/10.1016/j.copbio.2007.01.013] [PMID: 17292602]
[http://dx.doi.org/10.1007/s00394-008-0710-2] [PMID: 18506385]
[http://dx.doi.org/10.1016/B978-0-12-416003-3.00016-0] [PMID: 22361192]
[http://dx.doi.org/10.1016/j.lfs.2014.10.011] [PMID: 25445217]
[http://dx.doi.org/10.1271/bbb.90311] [PMID: 19809178]
[http://dx.doi.org/10.1093/nar/gku1141] [PMID: 25392419]
[http://dx.doi.org/10.21010/ajtcam.v14i2.39] [PMID: 28573254]
[http://dx.doi.org/10.3168/jds.S0022-0302(96)76487-1] [PMID: 8880454]
[http://dx.doi.org/10.3168/jds.S0022-0302(95)76689-9] [PMID: 7790570]
[http://dx.doi.org/10.1021/bi00798a004] [PMID: 4334402]
[http://dx.doi.org/10.1016/j.idairyj.2005.10.012]
[http://dx.doi.org/10.1016/j.foodchem.2004.05.055]
[http://dx.doi.org/10.1021/jf051263l] [PMID: 16448176]
[http://dx.doi.org/10.1016/j.procbio.2016.01.009]
[http://dx.doi.org/10.1016/j.foodchem.2008.03.074] [PMID: 26047434]
[http://dx.doi.org/10.1021/jf0494027] [PMID: 15612765]
[http://dx.doi.org/10.1016/j.ijbiomac.2011.09.009] [PMID: 21945677]
[http://dx.doi.org/10.1016/j.metabol.2015.10.002] [PMID: 26773932]
[http://dx.doi.org/10.1271/bbb.59.325] [PMID: 7766033]
[http://dx.doi.org/10.1038/332411a0] [PMID: 2451132]
[http://dx.doi.org/10.1016/j.peptides.2010.06.024] [PMID: 20600419]
[http://dx.doi.org/10.1007/s11010-008-0023-z] [PMID: 19139972]
[http://dx.doi.org/10.1016/S1357-2725(02)00307-2] [PMID: 12676169]
[http://dx.doi.org/10.1097/00005344-200036001-00072] [PMID: 11078388]
[http://dx.doi.org/10.1016/S0074-7696(08)62590-5] [PMID: 9066130]
[http://dx.doi.org/10.1016/S0008-6363(99)00110-8] [PMID: 10536660]
[PMID: 7965744]
[http://dx.doi.org/10.1016/0006-291X(89)91625-2] [PMID: 2653322]
[http://dx.doi.org/10.1016/j.bbrc.2019.03.149] [PMID: 30926169]
[http://dx.doi.org/10.1161/01.HYP.19.2.131]
[http://dx.doi.org/10.3390/ijms19061744] [PMID: 29895790]
[http://dx.doi.org/10.1111/j.1582-4934.2010.01179.x] [PMID: 20874722]
[http://dx.doi.org/10.1016/j.bbrc.2012.01.070] [PMID: 22293193]
[http://dx.doi.org/10.1073/pnas.96.5.2514] [PMID: 10051674]