Identification of a cyclooxygenase-related gene and its potential role in prostaglandin formation.

Identification of a cyclooxygenase-related gene and its potential role in prostaglandin formation.
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环氧合酶相关基因的鉴定及其在前列腺素形成中的潜在作用。

DOI:
10.1016/0006-291x(89)91819-6
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发表时间:
1989
影响因子:
3.1
通讯作者:
Holtzman,MJ
Holtzman,MJ
中科院分区:
生物学4区
文献类型:
--
作者:
Rosen,GD;Birkenmeier,TM;Raz,A;Holtzman,MJ

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从绵羊气管粘膜分离的上皮细胞均质制备物中研究了环氧合酶表达的调节。与新鲜分离的细胞相比,培养的细胞产生环氧合酶衍生的花生四烯酸代谢物(主要是前列腺素E2)的能力显著增加。一个70 kDa的环氧合酶蛋白和相应的2.8 kb的mRNA协同表达,但它们的水平并没有增加成比例的环氧合酶活性的增加。北方印迹在较低的严格性的再杂交揭示了一个新的组织特异性的4.0 kb的mRNA物种的存在下,表现出在细胞培养过程中的表达增加。杂交的4.0 kb的mRNA与两个不重叠的cDNA探针,仅在低严格条件下表明,它是来自一个不同的基因。其与环氧合酶的相关性及其与酶活性平行的增加进一步表明较大的mRNA可能编码环氧合酶。
Regulation of cyclooxygenase expression was studied in homogenous preparations of epithelial cells isolated from sheep tracheal mucosa. Cellular capacity to generate cyclooxygenase-derived arachidonate metabolites (predominantly prostaglandin E2) increased markedly in cultured compared to freshly isolated cells. A 70 kDa cyclooxygenase protein and corresponding 2.8 kb mRNA were coordinately expressed but their levels did not increase proportionately to the increase in cyclooxygenase activity. Rehybridization of Northern blots at lower stringency revealed the presence of a new tissue-specific 4.0 kb mRNA species exhibiting increased expression during cell culture. Hybridization of the 4.0 kb mRNA with two nonoverlapping cDNA probes at only low stringency conditions suggests that it is derived from a distinct gene. Its relatedness to cyclooxygenase and its increase in parallel with enzymatic activity further suggest that the larger mRNA may encode for a cyclooxygenase.
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