Differential regulation of the messenger RNA for three major senescence marker proteins in male rat liver

Bandana Chatterjee, T. S. Nath, A. K. Roy

Research output: Contribution to journalArticle

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Abstract

Changes in the mRNAs coding for specific hepatic proteins in male rats during aging were examined by in vitro translation of the liver mRNA in the rabbit reticulocyte lysate. Characterization of the [35S]methionine-labeled translation products by sodium dodecyl sulfate-polyacrylamide slab gel electrophoresis followed by autoradiography showed major age-dependent changes in the hepatic concentrations of three mRNA species. The translation products of these three mRNAs were found to have Mr = 28,500, 26,300, and 19,500 and are called senescence marker proteins (SMP) 1, 2, and 3, respectively. On the basis of its immunochemical reactivity, SMP-3 (Mr = 19,500) is identified as α(2u)-globulin while the mRNAs for SMP-1 (Mr = 28,500) and SMP-2 (Mr = 26,300) code for two yet uncharacterized proteins. The liver of the prepubertal male rats was found to contain the mRNA for SMP-2 and showed almost complete absence of the mRNAs for SMP-1 and SMP-3. However, the mRNAs for both SMP-1 and SMP-3 were present in the postpubertal young adults while the mRNA for SMP-2 was absent. Finally, when the animals reached senescence, the mRNAs for SMP-1 and SMP-3 disappeared from the liver with the reappearance of the SMP-2 mRNA. Age-dependent regulation of the mRNAs for these three senescence marker proteins can serve as an important model for the study of differential gene expression during aging.

Original languageEnglish (US)
Pages (from-to)5939-5941
Number of pages3
JournalJournal of Biological Chemistry
Volume256
Issue number12
StatePublished - 1981
Externally publishedYes

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Liver
Rats
Messenger RNA
Proteins
Aging of materials
Reticulocytes
Globulins
Protein Biosynthesis
Electrophoresis
Autoradiography
Gene expression
Sodium Dodecyl Sulfate
Methionine
Polyacrylamide Gel Electrophoresis
Young Adult
Animals

ASJC Scopus subject areas

  • Biochemistry

Cite this

Differential regulation of the messenger RNA for three major senescence marker proteins in male rat liver. / Chatterjee, Bandana; Nath, T. S.; Roy, A. K.

In: Journal of Biological Chemistry, Vol. 256, No. 12, 1981, p. 5939-5941.

Research output: Contribution to journalArticle

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