Hamster liver cytochrome P450 (CYP2A8) as a 4-hydroxylase for 2,5,2',5'-tetrachlorobiphenyl

Nobuyuki Koga, Naoko Kikuichi, Tomoyo Kanamaru, Noritaka Ariyoshi, Kazuta Oguri, Hidetoshi Yoshimura

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Metabolism of 2,5,2',5'-tetrachlorobiphenyl (TCB) was studied using liver microsomes of hamsters and two hamster P450 isoforms, CYP1A2 and 2A8. CYP2A8 catalyzed selectively 4-hydroxylation of 2,5,2',5-TCB at a rate of 21.7 pmol/min/nmol P450. In contrast, CYP1A2 showed no activity for hydroxylation of 2,5,2',5'-TCB. Immunological study revealed that rabbit antiserum against CYP2A8 almost completely inhibited the microsomal 4-hydroxylation but that against CYP1A2 did not. It was also shown that the induction pattern of CYP2A8 protein by P450 inducer was similar to that of the 4-hydroxylase activity in hamster liver microsomes. These results suggest that CYP2A8 plays a major role in the 4-hydroxylation of 2,5,2',5'-TCB in hamster liver.

Original languageEnglish
Pages (from-to)685-688
Number of pages4
JournalBiochemical and Biophysical Research Communications
Volume225
Issue number2
DOIs
Publication statusPublished - Aug 14 1996
Externally publishedYes

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Hydroxylation
Mixed Function Oxygenases
Cricetinae
Cytochrome P-450 CYP1A2
Liver
Cytochrome P-450 Enzyme System
Liver Microsomes
Metabolism
Immune Sera
Protein Isoforms
Rabbits
Mesocricetus auratus CYP2A8 protein
2,5,2',5'-tetrachlorobiphenyl
Proteins

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

Cite this

Hamster liver cytochrome P450 (CYP2A8) as a 4-hydroxylase for 2,5,2',5'-tetrachlorobiphenyl. / Koga, Nobuyuki; Kikuichi, Naoko; Kanamaru, Tomoyo; Ariyoshi, Noritaka; Oguri, Kazuta; Yoshimura, Hidetoshi.

In: Biochemical and Biophysical Research Communications, Vol. 225, No. 2, 14.08.1996, p. 685-688.

Research output: Contribution to journalArticle

Koga, Nobuyuki ; Kikuichi, Naoko ; Kanamaru, Tomoyo ; Ariyoshi, Noritaka ; Oguri, Kazuta ; Yoshimura, Hidetoshi. / Hamster liver cytochrome P450 (CYP2A8) as a 4-hydroxylase for 2,5,2',5'-tetrachlorobiphenyl. In: Biochemical and Biophysical Research Communications. 1996 ; Vol. 225, No. 2. pp. 685-688.
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