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The Journal of Internal Korean Medicine > Volume 29(4); 2008 > Article
The Journal of Internal Korean Medicine 2008;29(4): 871-886.
石膏가 만성 신부전 Rat의 신기능 보호 및 조직학적 변화에 미치는 영향
변상혁
세명대학교 한의과대학 내과학교실
The Effects of Gypsum Fibrosum on Renal Functional and Histopathological Disorder in Chronic Renal Failure Rat Model
Sang-hyuk Byun
Dept. of Internal Medicine, College of Oriental Medicine, Se Myung University, Korea
Correspondence  Sang-hyuk Byun ,Tel: 043-649-1815, Fax: 043-645-1382, Email: borndoc@nate.com
  Published online: December 30, 2008.
ABSTRACT
Objective :
Gypsum fibrosum has been traditionally used in treatment of febrile diseases and recently been shown to have anti-inflammatory effect. Chronic renal failure has a serious clinical symptoms including proteinuria, azotemia, anemia, and hyperlipidemia and has characteristic histopathological changes, glomerular hypertrophy, infiltration of inflammatory cells, and crescentic sclerosis. We investigated the effects of gypsum fibrosum on renal functional and histopathological disorder in chronic renal failure rat model induced 5/6 nephrectomy.

Methods :
Using Sprague-Dawley rats, CRF was induced by 5/6 nephrectomy. The rats were divided into 3 groups, normal, conrol, and gypsum administered orally with gypsum fibrosum 500㎎/㎏/day. Body weight, 24 hr proteinuria, hematologic analysis, and histological morphologic changes were followed up after 8 weeks. The glomerular macrophage /monocyte infiltration, TGF-β1, type Ⅳ collagen, and angiotensin Ⅱ type1 receptor(AT1) were evaluated by immunohistochemistry.

Results:
In the CRF control group, functional parameters and histopathologic changes clearly indicated the development of CRF. 24 hr proteinuria significantly increased in the CRF control group over the normal group, and serum creatinine level was lower in the gypsum group than in the control group. LDL-cholesterol was significantly lower in the gypsum group than in the control group. Morphological investigations showed a variety of characteristic features of CRF, glomerular hypertrophy, increasing cellular density of glomerulus, deposition of extra-cellular matrix, fibrotic change, and glomerular sclerosis in the control group, but in the gypsum group, these features diminished significantly. In observation of renal type Ⅳ collagen and AT1 expression, positive area significantly increased in the control group over the normal group, and it significantly decreased in the gypsum group compared to the control group.

Conclusions:
Our findings suggest that gypsum fibrosum inhibits AT1 and type Ⅳ collagen expression in renal tissues and attenuates progression of glomerulosclerosis and interstitial fibrosis in chronic renal failure rats, which lead to amelioration of renal function. From these results, we suggest that gypsum fibrosum may have renoprotective effects and could be a useful remedy agent for treating chronic renal failure.
Key words: cchronic renal failure, Gypsum fibrosum, angiotensin Ⅱ, type Ⅳ collagen
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