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Article

Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats

  • Authors:
    • Jiahui Zheng
    • Jingyue Wang
    • Huanglei Pan
    • Hongli Wu
    • Difeng Ren
    • Jun Lu
  • View Affiliations / Copyright

    Affiliations: Beijing Key Laboratory of Forest Food Process and Safety, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, P.R. China, Beijing Engineering Research Center of Protein and Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing 100015, P.R. China
  • Pages: 8485-8492
    |
    Published online on: September 25, 2017
       https://doi.org/10.3892/mmr.2017.7602
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Abstract

The aim of the present study was to investigate the antihypertensive effects of the bioactive Spirulina platensis peptides Ile‑Gln‑Pro (IQP), Val‑Glu‑Pro (VEP), as well as Spirulina platensis hydrolysates (SH), and assessed whether the synthesis of components of the myocardial and renal local renin angiotensin system (RAS) are regulated differentially in spontaneously hypertensive rats (SHR). The SHR were administrated with IQP, VEP and SH respectively (10 mg/kg/day) for 6 weeks and received continuous monitoring of blood pressure (BP) for two more weeks. During the trial, the rats' kidney tissues were removed from these rats and collected at weeks 3, 6 and 8. The expression of the main components of local kidney RAS was measured at the mRNA levels by reverse transcription‑quantitative polymerase chain reaction, and at the protein levels by ELISA or western blotting. Oral administration of IQP, VEP and SH into SHR resulted in marked antihypertensive effects. IQP, VEP and SH decreased rats' BP by affecting the expression of local kidney RAS components via downregulating the angiotensin‑converting enzyme (ACE), Ang II and angiotensin II (Ang II) and angiotensin type‑1 receptor (AT 1), while upregulating ACE2, Ang (1‑7), Mas and AT 2. The comparisons of SH effects on local tissue RAS demonstrated that local kidney RAS regulated BP via the ACE‑Ang II‑AT 1/AT 2 axis and the ACE2‑Ang (1‑7)‑Mas axis primarily at the mRNA level, while the local myocardium RAS mainly at the protein level. This preliminary study suggests that the main components of local RAS presented different expression levels in myocardium and kidney, which is important to the development of bioactive peptides targeting for lowering BP by changing the levels of some components in local RAS in specific tissues.
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Copy and paste a formatted citation
Spandidos Publications style
Zheng J, Wang J, Pan H, Wu H, Ren D and Lu J: Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats. Mol Med Rep 16: 8485-8492, 2017.
APA
Zheng, J., Wang, J., Pan, H., Wu, H., Ren, D., & Lu, J. (2017). Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats. Molecular Medicine Reports, 16, 8485-8492. https://doi.org/10.3892/mmr.2017.7602
MLA
Zheng, J., Wang, J., Pan, H., Wu, H., Ren, D., Lu, J."Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats". Molecular Medicine Reports 16.6 (2017): 8485-8492.
Chicago
Zheng, J., Wang, J., Pan, H., Wu, H., Ren, D., Lu, J."Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats". Molecular Medicine Reports 16, no. 6 (2017): 8485-8492. https://doi.org/10.3892/mmr.2017.7602
Copy and paste a formatted citation
x
Spandidos Publications style
Zheng J, Wang J, Pan H, Wu H, Ren D and Lu J: Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats. Mol Med Rep 16: 8485-8492, 2017.
APA
Zheng, J., Wang, J., Pan, H., Wu, H., Ren, D., & Lu, J. (2017). Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats. Molecular Medicine Reports, 16, 8485-8492. https://doi.org/10.3892/mmr.2017.7602
MLA
Zheng, J., Wang, J., Pan, H., Wu, H., Ren, D., Lu, J."Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats". Molecular Medicine Reports 16.6 (2017): 8485-8492.
Chicago
Zheng, J., Wang, J., Pan, H., Wu, H., Ren, D., Lu, J."Effects of IQP, VEP and Spirulina platensis hydrolysates on the local kidney renin angiotensin system in spontaneously hypertensive rats". Molecular Medicine Reports 16, no. 6 (2017): 8485-8492. https://doi.org/10.3892/mmr.2017.7602
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