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Yasuoka Y, Izumi Y, Fukuyama T, Inoue H, Oshima T, Yamazaki T, Uematsu T, Kobayashi N, Shimada Y, Nagaba Y, Mukoyama M, Sato Y, Sands JM, Kawahara K, Nonoguchi H. Effects of Angiotensin II on Erythropoietin Production in the Kidney and Liver. Molecules 2021; 26:molecules26175399. [PMID: 34500833 PMCID: PMC8434508 DOI: 10.3390/molecules26175399] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/30/2021] [Accepted: 09/02/2021] [Indexed: 02/02/2023] Open
Abstract
The kidney is a main site of erythropoietin production in the body. We developed a new method for the detection of Epo protein by deglycosylation-coupled Western blotting. Detection of deglycosylated Epo enables the examination of small changes in Epo production. Using this method, we investigated the effects of angiotensin II (ATII) on Epo production in the kidney. ATII stimulated the plasma Epo concentration; Epo, HIF2α, and PHD2 mRNA expression in nephron segments in the renal cortex and outer medulla; and Epo protein expression in the renal cortex. In situ hybridization and immunohistochemistry revealed that ATII stimulates Epo mRNA and protein expression not only in proximal tubules but also in collecting ducts, especially in intercalated cells. These data support the regulation of Epo production in the kidney by the renin–angiotensin–aldosterone system (RAS).
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Affiliation(s)
- Yukiko Yasuoka
- Department of Physiology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0374, Kanagawa, Japan; (Y.Y.); (T.O.); (K.K.)
| | - Yuichiro Izumi
- Department of Nephrology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Kumamoto, Japan; (Y.I.); (H.I.); (M.M.)
| | - Takashi Fukuyama
- Division of Biomedical Research, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (T.F.); (T.Y.); (T.U.); (N.K.)
| | - Hideki Inoue
- Department of Nephrology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Kumamoto, Japan; (Y.I.); (H.I.); (M.M.)
| | - Tomomi Oshima
- Department of Physiology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0374, Kanagawa, Japan; (Y.Y.); (T.O.); (K.K.)
| | - Taiga Yamazaki
- Division of Biomedical Research, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (T.F.); (T.Y.); (T.U.); (N.K.)
| | - Takayuki Uematsu
- Division of Biomedical Research, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (T.F.); (T.Y.); (T.U.); (N.K.)
| | - Noritada Kobayashi
- Division of Biomedical Research, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (T.F.); (T.Y.); (T.U.); (N.K.)
| | - Yoshitaka Shimada
- Division of Internal Medicine, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (Y.S.); (Y.N.)
| | - Yasushi Nagaba
- Division of Internal Medicine, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (Y.S.); (Y.N.)
| | - Masashi Mukoyama
- Department of Nephrology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Kumamoto, Japan; (Y.I.); (H.I.); (M.M.)
| | - Yuichi Sato
- Department of Molecular Diagnostics, School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0373, Kanagawa, Japan;
| | - Jeff M Sands
- Renal Division, Department of Medicine, Emory University School of Medicine, 1639 Pierce Drive, WMB Room 3313, Atlanta, GA 30322, USA;
| | - Katsumasa Kawahara
- Department of Physiology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0374, Kanagawa, Japan; (Y.Y.); (T.O.); (K.K.)
| | - Hiroshi Nonoguchi
- Division of Internal Medicine, Kitasato University Medical Center, 6-100 Arai, Kitamoto 364-8501, Saitama, Japan; (Y.S.); (Y.N.)
- Correspondence: ; Tel.: +81-48-593-1212
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