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KMID : 0338420110260030314
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The Korean Journal of Internal Medicine
2011 Volume.26 No. 3 p.314 ~ p.319
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Cyclosporin A Inhibits Albumin Synthesis in Huh7 Cells
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Jeon Youn-Joo
Kim Yong-Soo
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Abstract
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Background/Aims: Hypoalbuminemia occurs frequently in renal transplant recipients immediately after renal transplantation. We studied the regulation of hepatic albumin synthesis by cyclosporin A (CsA) in Huh7 cells.
Methods: Huh7 cells were incubated with various concentrations of CsA for 4, 8, 16, and 24 hours. Albumin was measured in Huh7 cell-conditioned medium by sandwich enzyme-linked immunosorbent assay and Western blot. Albumin mRNA expression was analyzed by Northern blotting in CsA-treated cells.
Results: CsA (10-7-10-4 M) inhibited albumin synthesis in Huh7 cells in a dose- dependent manner. A Western blot analysis for albumin in the conditioned medium released from CsA-treated (10-7-10-5 M) cells also showed significant inhibition of albumin synthesis in a dose-dependent manner. Vehicle (olive oil) did not affect albumin synthesis. In contrast, a Northern blot analysis revealed no inhibition of albumin mRNA expression by CsA at any time point from 1-24 hours, indicating that the inhibition of albumin synthesis occurred at the translational level.
Conclusions: Our results suggest that inhibition of hepatic albumin synthesis by high dose CsA contributes to the hypoalbuminemia in renal transplant recipients.
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KEYWORD
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Cyclosporin A, Albumins, Kidney transplantation, Hypoalbuminemia
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