| 著者 | Tsukamoto, Naoko| Otsuka, Fumio| Miyoshi, Tomoko| Inagaki, Kenichi| Nakamura, Eri| Suzuki, Jiro| Ogura, Toshio| Iwasaki, Yasumasa| Makino, Hirofumi| |
|---|---|
| 発行日 | 2011-01-30 |
| 出版物タイトル | Molecular and Cellular Endocrinology |
| 巻 | 332巻 |
| 号 | 1-2号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/AMO/40128 |
|---|---|
| フルテキストURL | 64_4_213.pdf |
| 著者 | Otani, Hiroyuki| Otsuka, Fumio| Inagaki, Kenichi| Suzuki, Jiro| Makino, Hirofumi| |
| 抄録 | Aldosterone production occurs in the adrenal cortex, and is regulated primarily by angiotensin II (Ang II), potassium and adrenocorticotropin (ACTH). In the presence of the aldosterone stimulators, steroidogenesis is further governed by local autocrine and/or paracrine factors in the adrenal cortex. We reported the presence of functional bone morphogenetic protein (BMP) system in the adrenal cortex and also demonstrated that BMP-6 increases Ang II-induced aldosterone production, which could be involved in the "aldosterone breakthrough" phenomenon. Aldosterone breakthrough is the phenomenon by which circulating aldosterone concentrations increase above pre-treatment levels after long-term therapy with ACE inhibitors or Ang II type 1 receptor antagonists (ARB). This phenomenon may lead to important clinical consequences since increased aldosterone in a high-salt state facilitates cardiovascular and renal damage in hypertensive patients. We found that long-term ARB treatment reverses the reduction of aldosterone synthesis by adrenocortical cells, thereby causing "cellular aldosterone breakthrough". The availability of BMP-6 in the adrenal cortex may be at least partly involved in the occurrence of cellular escape from aldosterone suppression under chronic treatment with ARB. |
| キーワード | adrenal cortex angiotensin II aldosterone bone morphogenetic protein |
| Amo Type | Review |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2010-08 |
| 巻 | 64巻 |
| 号 | 4号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 213 |
| 終了ページ | 218 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 20802537 |
| Web of Science KeyUT | 000281384400001 |
| 著者 | Otani, Hiroyuki| Otsuka, Fumio| Inagaki, Kenichi| Suzuki, Jiro| Miyoshi, Tomoko| Kano, Yoshihiro| Goto, Junko| Ogura, Toshio| Makino, Hirofumi| |
|---|---|
| 発行日 | 2008-06-25 |
| 出版物タイトル | Endocrinology |
| 巻 | 149巻 |
| 号 | 6号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/AMO/30375 |
|---|---|
| フルテキストURL | fulltext.pdf |
| 著者 | Mimura, Yukari| Ogura, Toshio| Yamauchi, Takayoshi| Otsuka, Fumio| Oishi, Tetsuya| Harada, Kazushi| Hashimoto, Masami| Ota, Zensuke| |
| 抄録 | We recently reported that stimulation of the arginine vasopressin (AVP) V1-receptor enhanced the pressor response in spontaneously hypertensive rats (SHR). In the present study, we investigated acute changes in systolic blood pressure (SBP) and heart rate (HR) after intravenous injections of AVP, OPC-21268 (a V1-receptor antagonist), and OPC-31260 (a V2-receptor antagonist), in anesthetized DOCA-salt hypertensive rats (DOCA) and age-matched sham-operated Wistar rats (control) to determine whether the pressor effect is specific to SHR or is present in other hypertensive animal models. SBP increased significantly in DOCA rats 9 min after injection of AVP 5 ng/kg without a concomitant increase in HR. Neither OPC-21268 3mg/kg nor OPC-31260 3mg/kg caused significant changes in SBP or HR. SBP tended to increase when AVP was administered after injection of OPC-31260. HR increased significantly 15 min after the combined treatment with OPC-31260 and AVP in DOCA rats compared with control rats. SBP did not change significantly when AVP was administered after injection of OPC-21268 in DOCA or control rats, but HR decreased significantly from 1 to 4 min after injection of AVP in DOCA rats. Our results suggest that V1-receptor stimulation does not enhance the pressor response in the DOCA rat, which is a model of volume-dependent hypertension, suggesting that the AVP system, especially V1-receptor, is not as important in the development or maintenance of hypertension in DOCA rats as in SHR. |
| キーワード | vasopressin DOCA-salt hypertensive rat V1-and V2-receptor antagonist spontaneously hypertesive rat(SHR) OPC-21268 |
| Amo Type | Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 1995-08 |
| 巻 | 49巻 |
| 号 | 4号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 187 |
| 終了ページ | 194 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 7502678 |
| Web of Science KeyUT | A1995RR97800002 |
| 著者 | 大谷 寛之| 大塚 文男| 槇野 博史| |
|---|---|
| 発行日 | 2010-04-01 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 122巻 |
| 号 | 1号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 武田 昌也| 大塚 文男| 中村 一文| 稲垣 兼一| 鈴木 二郎| 三浦 大志| 藤尾 栄起| 松原 広己| 伊達 洋至| 大江 透| 槇野 博史| |
|---|---|
| 発行日 | 2006-05-01 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 118巻 |
| 号 | 1号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 大塚 文男| |
|---|---|
| 発行日 | 2007-09-03 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 119巻 |
| 号 | 2号 |
| 資料タイプ | 一般雑誌記事 |
| フルテキストURL | K001796.pdf |
|---|---|
| 著者 | 大塚 文男| |
| 発行日 | 1998-03-31 |
| 資料タイプ | 学位論文 |
| 学位授与番号 | 甲第1796号 |
| 学位授与年月日 | 1998-03-31 |
| 学位・専攻分野 | 博士（医学） |
| 授与大学 | 岡山大学 |
| 言語 | 日本語 |