Jpn. J. Pharmacol. 85 (1), 105-108 (2001)

Guinea Pig Histamine N-Methyltransferase: cDNA Cloning and mRNA Distribution

Junichi Kitanaka1, Nobue Kitanaka1, Tohru Tsujimura2, Michiko Kakihana2, Nobuyuki Terada2 and Motohiko Takemura1,*

Departments of 1Pharmacology and 2Pathology I, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
*Corresponding author. FAX: +81-798-45-6332

Abstract: We report here the isolation of histamine N-methyltransferase (HMT) cDNA from the guinea pig brain by the polymerase chain reaction on the basis of nucleotide sequences of rat and human counterparts. Guinea pig HMT consists of 292 amino acids, with homologies of 75.6% and 79.1% to rat and human HMT, respectively. Northern blotting analysis indicated that the 1.6-kb guinea pig HMT transcript was expressed at various levels in different tissues at the following relative abundance: jejunum, brain > lung, spleen, stomach > liver, kidney. HMT mRNA localized throughout@the jejunum, and it was mainly expressed in epithelial cells and in Auerbach's plexus.

Keywords: Histamine N-methyltransferase, mRNA, Localization

Copyright The Japanese Pharmacological Society

[Back to TOC]