Detection of human CYP2C8, CYP2C9, and CYP2J2 in cardiovascular tissues

被引：128

作者：

DeLozier, Tracy C.

Kissling, Grace E.

Coulter, Sherry J.

Dai, Diana

Foley, Julie F.

Bradbury, J. Alyce

Murphy, Elizabeth

Steenbergen, Charles

Zeldin, Darryl C.

Goldstein, Joyce A.

机构：

[1] NIEHS, Human Metab Sect, Lab Pharmacol & Chem, Res Triangle Pk, NC 27709 USA

[2] NIEHS, Lab Resp Biol, Res Triangle Pk, NC 27709 USA

[3] NIEHS, Lab Expt Pathol, Res Triangle Pk, NC 27709 USA

[4] NIEHS, Biostat Branch, Res Triangle Pk, NC 27709 USA

[5] NIEHS, Lab Signal Transduct, Res Triangle Pk, NC 27709 USA

[6] Duke Univ, Med Ctr, Dept Pathol, Durham, NC 27706 USA

来源：

DRUG METABOLISM AND DISPOSITION | 2007年 / 35卷 / 04期

关键词：

D O I：

10.1124/dmd.106.012823

中图分类号：

R9 [药学];

学科分类号：

1007 ;

摘要：

The cytochrome P450 ( P450) enzymes CYP2C8, CYP2C9, and CYP2J2 metabolize arachidonic acid to epoxyeicosatrienoic acids, which are known to be vital in regulation of vascular tone and cardiovascular homeostasis. Because there is limited information regarding the relative expression of these P450 enzymes in cardiovascular tissues, this study examined the expression of CYP2C8, CYP2C9, and CYP2J2 mRNA and protein in human heart, aorta, and coronary artery samples by real-time polymerase chain reaction, immunoblotting, and immunohistochemistry. CYP2J2 and CYP2C9 mRNA levels were highly variable in human hearts, whereas CYP2C8 mRNA was present in lower abundance. CYP2J2 mRNA was approximately 10(3) times higher than CYP2C9 or CYP2C8 in human heart. However, CYP2C9 mRNA was more abundant than CYP2J2 or CYP2C8 in one ischemic heart. In human aorta, mean CYP2C9 mRNA levels were similar to 50 times higher than that of CYP2J2 and 5-fold higher than that of CYP2C8. In human coronary artery, mean values for CYP2C9 mRNA were similar to 2-fold higher than that of CYP2J2 mRNA and 6-fold higher than that of CYP2C8 mRNA. Immunoblotting results show relatively high levels of CYP2J2 and CYP2C8 protein in human hearts, which was confirmed by immunohistochemistry. CYP2C9 protein was also detected at high levels in one ischemic heart by immunoblotting. CYP2C9 was present at higher levels than CYPJ2 in aorta and coronary artery, whereas CYP2C8 protein was below the limits of detection. The expression of CYP2J2 and CYP2C8 in human heart, and CYPC9 and CYP2J2 in aorta and coronary artery is consistent with a physiological role for these enzymes in these tissues.

引用

页码：682 / 688

页数：7

共 41 条

[11] Endothelium-derived hyperpolarizing factor synthase (cytochrome P4502C9) is a functionally significant source of reactive oxygen species in coronary arteries [J].