| Regulation of cell turnover in the livers of tumour-bearing rats: occurrence of apoptosis. | |
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MedLine Citation:
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PMID: 2793240 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Growth of a highly-deviated ascites hepatoma (Yoshida AH-130) in rats caused initial hyperplastic enlargement of the liver, followed by progressive reduction to a size lower than that seen in controls. The time-course of this biphasic change in liver weight roughly corresponded to the exponential and stationary phases of tumour growth. Histologically, scattered small foci of perilobular necrosis were observed during the hyperplastic phase and these were consistently associated with a moderate elevation of glutamate-pyruvate transaminase (GPT) activity in the blood plasma. By contrast, signs of necrosis were absent and plasma GTP levels had returned to normal during the phase of hepatic involution, which was characterized by enhanced apoptosis, a type of single-cell death known to be involved in the regulation of tissue size under both normal and pathological conditions. Biochemically, alterations in liver protein mass resulted from changed rates of tissue protein degradation. The apoptotic bodies could either be lost from the liver via blood, lymph and bile, or phagocytosed and degraded by adjacent cells. Disposal of the apoptotic bodies is likely to account, at least in part, for the enhanced rates of liver protein turnover that characterize hepatic involution. |
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Authors:
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L Tessitore; G Valente; G Bonelli; P Costelli; F M Baccino |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of cancer. Journal international du cancer Volume: 44 ISSN: 0020-7136 ISO Abbreviation: Int. J. Cancer Publication Date: 1989 Oct |
Date Detail:
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Created Date: 1989-11-21 Completed Date: 1989-11-21 Revised Date: 2007-07-24 |
Medline Journal Info:
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Nlm Unique ID: 0042124 Medline TA: Int J Cancer Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 697-700 Citation Subset: IM |
Affiliation:
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Dipartimento di Medicina ed Oncologia Sperimentale, Università di Torino, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Atrophy / metabolism, pathology Cell Division / physiology Hyperplasia / metabolism, pathology Liver / metabolism*, pathology Liver Neoplasms, Experimental / metabolism*, pathology Male Neoplasm Transplantation Organ Size / physiology Phagocytosis / physiology* Proteins / metabolism* Rats Rats, Inbred Strains |
| Chemical | |
Reg. No./Substance:
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0/Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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