title: cDNA representational difference analysis used in the identification of genes related to the aging process in rat kidney.
abstract: Aging is a complex physiological process by which the functions of many organ systems deteriorate. Growing evidence shows that age-related changes and damage are causally related to oxidative stress and inflammatory responses from reactive species. The aim of this study was to identify differentially expressed genes in old and young kidneys of Fisher 344 male rats during the aging process using complementary DNA representational difference analysis (cDNA RDA). cDNA RDA is a subtractive technique for identifying a focused set of differentially expressed genes. The distinctive advantage of this technique is its capability of detecting differences in gene expressions at less than one copy per cell and identifying genes not previously described in the database. Reverse transcription-polymerase chain reaction with specific primers was applied to confirm the differences found by RDA. Twenty-one putative differentially expressed genes were identified. Sixteen genes were up-regulated during aging and were associated with stress-response and inflammatory reactions, while five genes were down-regulated. These data suggested that the inflammatory process is a plausible cause of the aging process.
authors.affiliation: College of Pharmacy, Aging Tissue Bank, Pusan National University, Jangjeon-dong, Geumjeong-ku, Busan 609-735, South Korea.
authors.forename: Bokyung
authors.initials: B
authors.lastname: Sung
authors.forename: Kyung Jin
authors.initials: KJ
authors.lastname: Jung
authors.forename: Hyun Seok
authors.initials: HS
authors.lastname: Song
authors.forename: Myung Jin
authors.initials: MJ
authors.lastname: Son
authors.forename: Byung Pal
authors.initials: BP
authors.lastname: Yu
authors.forename: Hae Young
authors.initials: HY
authors.lastname: Chung
mesh_terms: D000367:Age Factors; D000375:Aging; D000818:Animals; D017931:DNA Primers / Q000737:chemistry; D018076:DNA, Complementary / Q000378:metabolism*; D015536:Down-Regulation; D004996:Ethidium / Q000494:pharmacology; D020869:Gene Expression Profiling / Q000379:methods*; D005786:Gene Expression Regulation; D007668:Kidney / Q000378:metabolism*; D012313:RNA / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D015398:Signal Transduction; D013997:Time Factors; D015854:Up-Regulation
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D012333:RNA, Messenger; D012313:RNA; D004996:Ethidium