title: Age-related expression analysis of mouse liver nuclear protein binding to 3'-untranslated region of Period2 gene.
abstract: In mammals, both circadian rhythm and aging play important roles in regulating time-dependent homeostasis. We previously discovered an age-related increase element binding protein, hnRNP A3, which binds to the 3'-untranslated region (UTR) of blood coagulation factor IX (FIX). Here, we describe other members of this protein family, hnRNP C and hnRNP H, which bind to the 3'-UTR of the mouse circadian clock gene Period 2 (mPer2). RNA electrophoretic mobility shift assays using a (32)P-labeled Per2 RNA probe coupled with two-dimensional gel electrophoresis followed by MALDI-TOF/MS peptide mass fingerprint analysis was used to analyze these proteins. Western blotting suggested that the total expression of these proteins in mouse liver cell nuclei does not increase with age. Two-dimensional gel electrophoresis analysis of age-related protein expression showed that many isoforms of these proteins exist in the liver and that each protein exhibits a complex age-related expression pattern. These results suggest that many isoforms of proteins are regulated by different aging systems and that many age regulation systems function in the liver.
authors.affiliation: Applied Molecular-Imaging Physics, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, 060-8638, Japan, toshi-ha@med.hokudai.ac.jp.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Hamada
authors.forename: Kazuko
authors.initials: K
authors.lastname: Miyakawa
authors.forename: Hiroko
authors.initials: H
authors.lastname: Kushige
authors.forename: Shigenobu
authors.initials: S
authors.lastname: Shibata
authors.forename: Sumiko
authors.initials: S
authors.lastname: Kurachi
mesh_terms: D020413:3' Untranslated Regions; D000375:Aging / Q000235:genetics* / Q000378:metabolism*; D000818:Animals; D001483:Base Sequence; D001665:Binding Sites / Q000235:genetics; D002940:Circadian Rhythm / Q000235:genetics / Q000502:physiology; D034482:Heterogeneous-Nuclear Ribonucleoprotein Group C / Q000378:metabolism*; D034541:Heterogeneous-Nuclear Ribonucleoprotein Group F-H / Q000378:metabolism*; D008099:Liver / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D056950:Period Circadian Proteins / Q000235:genetics*; D011485:Protein Binding
chemical_list: D020413:3' Untranslated Regions; D034482:Heterogeneous-Nuclear Ribonucleoprotein Group C; D034541:Heterogeneous-Nuclear Ribonucleoprotein Group F-H; C513312:Per2 protein, mouse; D056950:Period Circadian Proteins
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