The effects of acute ethanol on growth in rat liver: Steady state c- myc transcripts

In order to elucidate the effects of acute ethanol on compensatory liver growth (regeneration), the steady state c- myc mRNA levels were studied following two-thirds partial hepatectomy. After surgery, control rat livers exhibited two peaks of c- myc transcripts, at 0.5–2 h and at 8–10 h. Sham surge...

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Veröffentlicht in:Alcohol (Fayetteville, N.Y.) N.Y.), 1992-05, Vol.9 (3), p.279-282
Hauptverfasser: Lumpkin, C.K., Taylor, J.M., Tarpley, M.D., Hayden, J.B., Badger, T.M., McClung, J.K.
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container_end_page 282
container_issue 3
container_start_page 279
container_title Alcohol (Fayetteville, N.Y.)
container_volume 9
creator Lumpkin, C.K.
Taylor, J.M.
Tarpley, M.D.
Hayden, J.B.
Badger, T.M.
McClung, J.K.
description In order to elucidate the effects of acute ethanol on compensatory liver growth (regeneration), the steady state c- myc mRNA levels were studied following two-thirds partial hepatectomy. After surgery, control rat livers exhibited two peaks of c- myc transcripts, at 0.5–2 h and at 8–10 h. Sham surgery did not induce c- myc mRNA expression. Ethanol (3 g/kg), administered by gavage at 1 hour prehepatectomy, had no effect on the initial peak of c- myc mRNA; however, the second peak was eliminated. Control gavage of isocaloric glucose prior to partial hepatectomy had no effects on either of the subsequent c- myc mRNA peaks. Blood alcohol levels were found to be elevated throughout the prereplicative phase. These results suggest that ethanol may disrupt proto-oncogene expression near the restriction point at the G1/S boundary of the cell cycle in hepatocytes.
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After surgery, control rat livers exhibited two peaks of c- myc transcripts, at 0.5–2 h and at 8–10 h. Sham surgery did not induce c- myc mRNA expression. Ethanol (3 g/kg), administered by gavage at 1 hour prehepatectomy, had no effect on the initial peak of c- myc mRNA; however, the second peak was eliminated. Control gavage of isocaloric glucose prior to partial hepatectomy had no effects on either of the subsequent c- myc mRNA peaks. Blood alcohol levels were found to be elevated throughout the prereplicative phase. 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subjects Alcoholism and acute alcohol poisoning
Animals
Biological and medical sciences
Blotting, Northern
c- myc
Ethanol
Ethanol - blood
Ethanol - pharmacology
Hepatectomy - methods
Homeostasis
Liver
Liver - metabolism
Liver Regeneration - drug effects
Male
Medical sciences
Proto-Oncogene Proteins c-myc - genetics
Proto-Oncogene Proteins c-myc - metabolism
Protooncogene
Rats
Rats, Inbred Strains
Regeneration
RNA, Messenger - metabolism
Time Factors
Toxicology
Transcription, Genetic
title The effects of acute ethanol on growth in rat liver: Steady state c- myc transcripts
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