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Yeungnam Univ J Med > Volume 9(1); 1992 > Article
Yeungnam University Journal of Medicine 1992;9(1):137-148.
DOI: https://doi.org/10.12701/yujm.1992.9.1.137    Published online June 30, 1992.
Effect of phenobarbital pretreatment on the hepatotoxicity of carbon tetrachloride in rat.
Young Soo Byun, Hae Joo Nam, Mi Jin Kim, Dong Suk Kim, Won Hee Choi, Tae Sook Lee
Abstract
The purpose of this study was to evaluate the influence of phenobarbital (PB) on hepatotoxic effect of carbon tetrachloride (CCI4) which induces centrilobular necrosis in liver. Rats were injected intraperitoneally CCI4 dissolved in olive oil by a dose of 0.4 mg/kg. For change related to PB pretreatment, rats were injected CCI₄ 0.4mg/kg after PB pretreatment. The liver samples were taken in 6, 12, 24, 48, 72 and 120 hours after CCI₄ and/ or PB injection. Extracted liver tissue was examined with light and electron microscopes. The results were summarized as follows: 1. Light microscopic findings: In CCI₄ group, centrilobular necrosis developed from 6 hours after injection, was the most severe in 48 hours, and recovered after 72 hours. In addition to necrosis, fatty change and pale cell change were accompanied. In PB-CCI4 group, necrosis occurred from 6 hours after CCI₄ injection and continued to 72 hours, and the degree of necrosis was more severe than that of CCI₄ group and pale cell change was decreased. 2. Electron microscopic findings: In CCI4 group, the early principal change was clumping and vesicular dilatation of endoplasmic reticulum. In PB-CCI₄ group, the degenerative change of endoplasmic reticulum was aggravated and the mitochondria also revealed severe degenerative change. According to the results, it was revealed that CCI₄ hepatotoxicity primarily began with the damage of endoplasmic reticulum, then damage of other cell organelles and cell necrosis followed, and these cytotoxic effects were aggravated by PB pretreatment.
Key Words: Phenobarbital, Carbon tetrachloride, Liver


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