caa a22 4500 477120598 CHVBK 20180405111635.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00408664 doi (NATIONALLICENCE)springer-10.1007/BF00408664 Chronic low-dose treatment with enalapril induced cardiac regression of left ventricular hypertrophy [Elektronische Daten] [Naoki Makino, Masahiro Sugano, Tomoji Hata, Sachiyo Taguchi, Takashi Yanaga] Numerous studies suggest that the renin angiotensin system (RAS) is involved in the development of cardiac hypertrophy. In the present study we produced cardiac hypertrophy in rats subjected to abdominal aortic banding and also induced cardiac regression by the administration of an angiotensin converting enzyme (ACE) inhibitor, enalapril, at 3, 10 and 30 mg/kg/day. Each drug was administered to the rats for 6 weeks from 6 weeks after aortic banding. The left ventricular weight significantly decreased at 10 and 30 mg/kg/day of enalapril as well as the systolic blood pressure. Using the reverse transcriptase polymerase chain reaction, the increased levels of ACE and AT1 mRNA were significantly inhibited in the aortic banding rats treated with the above concentrations of enalapril. The ACE activity in both the plasma and heart tissue preparations was significantly inhibited by enalapril. Similar observations were also seen after the administration of angiotensin type 1 receptor blockade, E-4177, into the aortic banding rats. The treatment with enalapril at 3 mg/kg/day did not reduce the left ventricular weight or the systolic blood pressure in the aortic banding rats. However, this low-dose treatment did significantly decrease the left ventricle to body weight ratio in the aortic banding rats without a reduction of the systolic blood pressure. Therefore, using the low-dose enalapril, the ACE activity in plasma was in part inhibited and the levels of ACE mRNA also decreased in the heart tissue of aortic banding rats, while the level of AT1 mRNA showed no such decrease. These results thus indicate that chronic ACE inhibitor at low doses has a beneficial effect on the regression in the pressure-induced cardiac hypertrophy. It is thus assumed that this effect may also contribute to the presence of an alternate pathway for the conversion of angiotensin I to angiotensin II which might also act as a possible mechanism for cardiac regression. Kluwer Academic Publishers, 1996 renin-angiotensin nationallicence cardiac hypertrophy nationallicence angiotensin converting enzyme nationallicence protein synthesis nationallicence Makino Naoki Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut Sugano Masahiro Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut Hata Tomoji Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut Taguchi Sachiyo Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut Yanaga Takashi Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut Molecular and Cellular Biochemistry Kluwer Academic Publishers; http://www.wkap.nl 163-164/1(1996-03-01), 239-245 0300-8177 163-164:1<239 1996 163-164 11010 https://doi.org/10.1007/BF00408664 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00408664 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Makino Naoki Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut NATIONALLICENCE 700 1- Sugano Masahiro Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut NATIONALLICENCE 700 1- Hata Tomoji Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut NATIONALLICENCE 700 1- Taguchi Sachiyo Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut NATIONALLICENCE 700 1- Yanaga Takashi Department of Bioclimatology and Medicine, Medical Institute of Bioregulation, Kyushu University, 4546 Tsurumihara, 874, Beppu, Japan aut NATIONALLICENCE 773 0- Molecular and Cellular Biochemistry Kluwer Academic Publishers; http://www.wkap.nl 163-164/1(1996-03-01), 239-245 0300-8177 163-164:1<239 1996 163-164 11010 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer