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Five age-dependently expressed genes in mouse brain revealed by the fluorescence differential display-PCR technique.

  • R Iida‎ et al.
  • Experimental gerontology‎
  • 2002‎

We used a fluorescence differential display-PCR (FDD-PCR) technique to analyze the genes expressed in mouse brains collected at nine different developmental stages ranging from 3 days to 15 months after birth, and 5 age-dependently expressed genes were found. Age-dependent expression of each of these 5 genes was confirmed by quantitative real-time PCR analysis. Of the 5 genes, 4 (B1-B4) had high homology with the nucleotide sequences of cDNA clones of known mouse genes (myelin proteolipid protein, transferrin, embryo cDNA from the RIKEN full-length enriched library, and protein tyrosine phosphatase), and the rest (B5) with expressed sequence tags of an unknown gene. Sequencing analysis of the full-length cDNA constructed based on the B5 sequence demonstrated that the gene product of B5 was identical to G-substrate, a specific substrate for cGMP-dependent protein kinase. The expression patterns of known genes obtained in our study may provide a further opportunity to investigate the biological and physiological roles of the proteins they encode.


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