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Ansary TM, Urushihara M, Fujisawa Y, Nagata S, Urata H, Nakano D, Hirofumi H, Kitamura K, Kagami S, Nishiyama A. Effects of the selective chymase inhibitor TEI-F00806 on the intrarenal renin-angiotensin system in salt-treated angiotensin I-infused hypertensive mice. Exp Physiol 2018; 103:1524-1531. [PMID: 30137655 DOI: 10.1113/ep087209] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/20/2018] [Indexed: 12/20/2022]
Abstract
NEW FINDINGS What is the central question of this study? Can chymase inhibition prevent angiotensin I-induced hypertension through inhibiting the conversion of angiotensin I to angiotensin II in the kidney? What is the main finding and its importance? Treatment with TEI-F00806 decreased angiotensin II content of the kidney, renal cortical angiotensinogen protein levels and chymase mRNA expression, and attenuated the development of hypertension. ABSTRACT The effects of the selective chymase inhibitor TEI-F00806 were examined on angiotensin I (Ang I)-induced hypertension and intrarenal angiotensin II (Ang II) production in salt-treated mice. Twelve-week-old C57BL male mice were given a high-salt diet (4% NaCl + saline (0.9% NaCl)), and divided into three groups: (1) sham + vehicle (5% acetic acid in saline), (2) Ang I (1 μg kg-1 min-1 , s.c.) + vehicle, and (3) Ang I + TEI-F00806 (100 mg kg-1 day-1 , p.o.) (n = 8-10 per group). Systolic blood pressure was measured weekly using a tail-cuff method. Kidney Ang II content was measured by radioimmunoassay. Chronic infusion of Ang I resulted in the development of hypertension (P < 0.001), and augmented intrarenal chymase gene expression (P < 0.05), angiotensinogen protein level (P < 0.001) and Ang II content (P < 0.01) in salt-treated mice. Treatment with TEI-F00806 attenuated the development of hypertension (P < 0.001) and decreased Ang II content of the kidney (P < 0.05), which was associated with reductions in renal cortical angiotensinogen protein levels (P < 0.001) and chymase mRNA expression (P < 0.05). These data suggest that a chymase inhibitor decreases intrarenal renin-angiotensin activity, thereby reducing salt-dependent hypertension.
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Affiliation(s)
- Tuba M Ansary
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Maki Urushihara
- Department of Pediatrics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Yoshihide Fujisawa
- Life Science Research Center, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Sayaka Nagata
- Circulatory and Body Fluid Regulation, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hidenori Urata
- Department of Cardiovascular Diseases, Fukuoka University Chikushi Hospital, Fukuoka, Japan
| | - Daisuke Nakano
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Hitomi Hirofumi
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Kazuo Kitamura
- Circulatory and Body Fluid Regulation, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Shoji Kagami
- Department of Pediatrics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Akira Nishiyama
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
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Li L, Konishi Y, Morikawa T, Zhang Y, Kitabayashi C, Kobara H, Masaki T, Nakano D, Hitomi H, Kobori H, Nishiyama A. Effect of a SGLT2 inhibitor on the systemic and intrarenal renin-angiotensin system in subtotally nephrectomized rats. J Pharmacol Sci 2017; 137:220-223. [PMID: 29983235 PMCID: PMC6050139 DOI: 10.1016/j.jphs.2017.10.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/26/2017] [Accepted: 08/09/2017] [Indexed: 01/13/2023] Open
Abstract
We aimed to examine the effects of a sodium glucose co-transporter 2 (SGLT2) inhibitor on systemic and intrarenal renin–angiotensin system (RAS) in subtotally nephrectomized non-diabetic rats, a model of chronic kidney disease (CKD). Oral administration of the selective SGLT2 inhibitor, TA-1887 (10 mg/kg/ day), for 10 weeks induced glycosuria. However, plasma renin activity, plasma angiotensinogen levels, kidney angiotensin II contents and renal injury were not significantly affected by TA-1887. These data indicate that chronic treatment with an SGLT2 inhibitor does not activate the systemic and intrarenal RAS in subjects with non-diabetic CKD.
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Affiliation(s)
- Lei Li
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Yoshio Konishi
- Division of Nephrology and Hypertension, Osaka City General Hospital, Osaka, Japan
| | - Takashi Morikawa
- Division of Nephrology and Hypertension, Osaka City General Hospital, Osaka, Japan
| | - Yifan Zhang
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Chizuko Kitabayashi
- Division of Nephrology and Hypertension, Osaka City General Hospital, Osaka, Japan
| | - Hideki Kobara
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Tsutomu Masaki
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Daisuke Nakano
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Hirofumi Hitomi
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Hiroyuki Kobori
- Departments of Pharmacology and Nephrology, School of Medicine, International University of Health and Welfare, Tokyo, Japan
| | - Akira Nishiyama
- Department of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
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Wołkow PP, Bujak-Giżycka B, Jawień J, Olszanecki R, Madej J, Rutowski J, Korbut R. Perindoprilat changes ANG (1-9) production in renal arteries isolated from young spontaneously hypertensive rats after ANG I incubation. Physiol Res 2016; 65:561-570. [PMID: 26988149 DOI: 10.33549/physiolres.933015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We used mass spectrometry to quantitate production of angiotensinogen metabolites in renal artery of 3- and 7-month-old Wistar-Kyoto (WKY) and Spontaneously Hypertensive Rats (SHR). Tissue fragments were incubated for 15 min in oxygenated buffer, with added angiotensin I. Concentrations of angiotensins I (ANG I), II (ANG II), III (ANG III), IV (ANG IV), angiotensin (1-9) [ANG (1-9)], angiotensin (1-7) [ANG (1-7)], and angiotensin (1-5) [ANG (1-5)], excreted into the buffer during experiment, were measured using liquid chromatography-mass spectrometry (LC/MS) and expressed per mg of dry tissue. Effects of pretreatment with 10 microM perindoprilat on the production of ANG I metabolites were quantitated. Background production of any of ANG I metabolites differed neither between WKY and SHR rats nor between 3- and 7-month-old rats. Perindoprilat pretreatment of renal arteries resulted, as expected, in decrease of ANG II production. However, renal arteries of 7-month-old SHR rats were resistant to ACE inhibitor and did not change ANG II production in response to perindoprilat. In renal arteries, taken from 3-month-old rats, pretreated with perindoprilat, incubation with ANG I, resulted in the level of ANG (1-9) significantly higher in SHR than WKY rats. Our conclusion is that in SHR rats, sensitivity of renal artery ACE to perindoprilat inhibition changes with age.
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Affiliation(s)
- P P Wołkow
- Department of Pharmacology, Jagiellonian University Medical College, Kraków, Poland.
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