The involvement of polyamines as substrates of transglutaminase in zonal different hepatocyte proliferation after partial hepatectomy

Yosuke Ohtake, Satoko Suyama, Shinya Abe, Naoko Sato, Soichi Kojima, Manabu Fukumoto, Yasuhito Ohkubo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have recently demonstrated the inverse correlation between transglutaminase (TGase) activity and DNA synthesis in periportal hepatocytes (PPH) and perivenous hepatocytes (PVH) at 1 d after partial hepatectomy. In order to elucidate a role of polyamines as substrates of TGase in the differential growth capacities between PPH and PVH from regenerating liver, we investigated the zonal differences in alteration of ornithine decarboxylase (ODC) activity and polyamines. In two subpopulations, the inverse correlation between DNA synthesis and ε-(γ-glutamyl) lysine (Gln-Lys) cross-linking catalyzed by TGase was demonstrated at 1 d after partial hepatectomy. ODC activity in PPH significantly increased with a peak at 1 d after partial hepatectomy, whereas did not in PVH. Protein-binding SPD in PPH also transiently increased with a peak at 1 d after partial hepatectomy, but did not in PVH. These results suggest that at 1 d after partial hepatectomy, in PPH, the inhibition of Gln-Lys cross-linking by the formation of N-γ-glutamyl SPD leads to the increase of DNA synthesis, whereas in PVH, enhanced formation of Gln-Lys cross-linking leads to the lower DNA synthesis.

Original languageEnglish
Pages (from-to)349-352
Number of pages4
JournalBiological and Pharmaceutical Bulletin
Volume28
Issue number2
DOIs
Publication statusPublished - 2005 Feb 1

Keywords

  • Liver regeneration
  • Ornithine decarboxylase
  • Periportal hepatocyte
  • Perivenous hepatocyte
  • Polyamine
  • Transglutaminase

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science

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