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一种小鼠血小板活化因子受体基因:克隆、染色体定位及脂多糖对腹膜常驻巨噬细胞中表达的上调作用

A murine platelet-activating factor receptor gene: cloning, chromosomal localization and up-regulation of expression by lipopolysaccharide in peritoneal resident macrophages.

作者信息

Ishii S, Matsuda Y, Nakamura M, Waga I, Kume K, Izumi T, Shimizu T

机构信息

Department of Biochemistry, Faculty of Medicine, The University of Tokyo, Japan.

出版信息

Biochem J. 1996 Mar 1;314 ( Pt 2)(Pt 2):671-8. doi: 10.1042/bj3140671.

Abstract

A murine gene encoding a platelet-activating factor receptor (PAFR) was cloned. The gene was mapped to a region of the D2.2 band of chromosome 4 both by fluorescence in situ hybridization and by molecular linkage analysis. Northern blot analysis showed a high expression of the PAFR message in peritoneal macrophages. When C3H/HeN macrophages were treated with bacterial lipopolysaccharide (LPS) or synthetic lipid A, the PAFR gene expression was induced. Bacterial LPS, but not lipid A, induced the level of PAFR mRNA in LPS unresponsive C3H/HeJ macrophages. These induction patterns were parallel to those of tumor necrosis factor-alpha mRNA. Thus the PAFR in macrophages is important in LPS-induced pathologies.

摘要

克隆了一个编码血小板活化因子受体(PAFR)的小鼠基因。通过荧光原位杂交和分子连锁分析,该基因被定位到4号染色体D2.2带的一个区域。Northern印迹分析显示PAFR信息在腹膜巨噬细胞中高表达。当用细菌脂多糖(LPS)或合成脂质A处理C3H/HeN巨噬细胞时,PAFR基因表达被诱导。细菌LPS而非脂质A可诱导LPS无反应性C3H/HeJ巨噬细胞中PAFR mRNA的水平。这些诱导模式与肿瘤坏死因子-α mRNA的诱导模式平行。因此,巨噬细胞中的PAFR在LPS诱导的病理过程中很重要。

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