The transcription of various types of ribonucleic acid by hepatocytes isolated from rats of various ages

A. Richardson, M. C. Birchenall-Sparks, J. L. Staecker, J. P. Hardwick, D. S. Liu

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Abstract

The synthesis of various types of ribonucleic acid (RNA)isolated from 6- to 30-month-old female Fischer F344 rats was compared. The rate of RNA synthesis by freshly prepared hepatocytes was determined by dividing the amount of [3H]orotic acid incorporated into RNA as uridine-5'-monophosphate by the specific activity of the uridine-5'-triphosphate pool. The rate of total RNA synthesis by hepatocytes from 19-month-old rats was 40% less than the rate for hepatocytes from 12-month-old rats. No significant difference in the rate of total RNA synthesis was observed between 19 and 30 months of age. The percentage of [3H]orotic acid incorporated into poly(A)+RNA by 30-month-old rats was approximately 50% less than that observed for hepatocytes isolated from 6-month-old rats. The percentage of [3H]orotic acid incorporated into poly(A)-RNA as ribosomal RNA (38S, 18S, and 5S RNAs) or transfer RNA was similar for 12- and 30-month-old rats. The rate of poly(A)+RNA synthesis by hepatocytes isolated from 30-month-old rats was 65% less than that observed for hepatocytes from 6-month-old rats. In contrast to total RNA synthesis, the rate of poly(A)+RNA synthesis for the 30-month-old rats was significantly less than the rate for 19-month-old rats.

Original languageEnglish (US)
Pages (from-to)666-672
Number of pages7
JournalUnknown Journal
Volume37
Issue number6
DOIs
StatePublished - Jan 1 1982

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ASJC Scopus subject areas

  • Aging

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Richardson, A., Birchenall-Sparks, M. C., Staecker, J. L., Hardwick, J. P., & Liu, D. S. (1982). The transcription of various types of ribonucleic acid by hepatocytes isolated from rats of various ages. Unknown Journal, 37(6), 666-672. https://doi.org/10.1093/geronj/37.6.666