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English Abstract
Journal Article
Research Support, Non-U.S. Gov't
[Effect of long-term ethanol administration (2). Free type and bound type ethanol and related substances contents of the urine from ethanol administrated rats, indices in the serum, and renal tissues].
Japanese Journal of Alcohol Studies & Drug Dependence 1997 Februrary
Histological effects of ethanol on the kidney were published in our previous report. In the present paper, results of the following measurement will be reported: contents of ethanol and related substances in the urine, both free and bound types, collected during the periods from 30 minutes to 11 hours after ethanol administration to rats, and ACE, alpha-GST, LPO, 25(OH)-D3, 1 alpha-25(OH)2-D3, 24, 25(OH)2-D3 in the serum of rats which had ethanol every day for a month. These will be reported together with histological observation of the kidney excised immediately after the blood sample was collected. The measurement of free and bound types ethanol, acetaldehyde, acetone and methanol in the urine was made up to 11 hours after administration of 4 g/kg b.w./day, p.o. and its results showed the highest contents at 9 hours after the administration. Bound type acetic acid showed the high contents at both 90 minutes and 9 hours after the administration. In 11 hours free type ethanol and acetaldehyde recovered their pre-administration value but as to the bound type only acetic acid recovered it. In the serum of the rats which were ethanol 4 g/kg b.w./day, oral administrated for a mouth, ACE showed significantly high value and 1 alpha, 25(OH)2-D3 and 24, 25(OH)2-D3 showed significantly low value relative to the control. Also alpha-GST showed a low value. In the kidney of the same rats the following changes were observed: swelling of glomerulus, thickening of basement membrane of glomerulus, PAS positive deposits in glomerulus, proliferation of mesangial cell, proliferation of juxtaglomenular cell, dilation of tubular lumen, swelling of tubular epithelial cell, its falling, hyaline droplet in tubular epithelial cell, cell infiltration to interstitial tissue, and basophilic tubule. There was not only difference between findings in the control and those in the liver and the brain of the rats which showed changes above-mentioned. As described above, changes were seen in the renal tissue caused by ethanol administration and in this connection changes in indices related to renal function were observed, too. Furthermore, urinary ethanol and related substances, not only free type but also bound type, that went through the kidney were observed for a long period time. The bound type, in particular, was observed for longer duration and hence effects of ethanol on the kidney were surely assumed. Presently longer term experiments are proceeding and other indices connected with renal functions are being studied.
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