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자료유형
학술저널
저자정보
저널정보
대한의생명과학회 대한의생명과학회지 대한의생명과학회지 제8권 제3호
발행연도
2002.9
수록면
127 - 135 (9page)

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Anterior subcapsular cataract was developed by opacification with transdifferentiation and abnormal proliferation of lens epithelial cells (LECs) and pathological accumulation of extracellular matrix (ECM). After-cataract also be caused by a similar transdifferntiation of LECs remaining after surgery and the accompanying increase of ECM deposits. It is known that prostaglandin E2 and cytokine, such as TGF-β, bFGF, and IL-1, were associated with abnormal proliferation and transdifferentiation of LECs. The aim of this study was to detect the expression of transforming growth factor-α (TGF-α), transforming growth factor-β₁ (TGF-β₁) and basic fibroblast growth factor (bFGF) in LECs of senile and diabetic cataract. The expressions of these growth factors in lens epithelial cells were determined. The sample for growth factor determination were collected in senile cataract patients without metabolic disorder, especially diabetes mellitus and diabetic cataract patients. The mRNA expression of growth factors was detected by semi-quantitative reverse transcription - polymerase chain reaction (RT-PCR) followed by Southern blot analysis. Statistics were analysed using Wilcoxon rank sum test. Semi-quantitative RT-PCR/southern analysis of RNA obtained from thirty surgical specimens demonstrated that the level of mRNA expression of TGF-α, -β₁ and bFGF was increased in diabetic cataract lens tissues compared with senile cataract specimens but non-significant, bFGF and TGF-β₁ mRNA expression were detected in most patients, expression level of TGF-β₁ was most high on the basis of normal ocular concentration. Detection rate of TGF-α in diabetic cataract was 1.5 fold higher than in senile cataract (P=0.098). TGF-α, TGF-β₁ and bFGF mRNA expression of LECs were detected in senile and diabetic cataract. In both patient groups, expression level of TGF-β₁ mRNA was high, so We suggest TGF-β₁ strong influence in development of senile cataract and of diabetic cataract also. TGF-α expression level was similar but more frequently detected in diabetic cataract than in senile cataract. In conclusion, TGF-α may be associated with early development of diabetic cataract.

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