Vitamin B6 down-regulates the expression of human GPIIb gene

Sue Joan Chang, Han Ju Chuang, Hong Hwa Chen

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

Glycoprotein IIb (GPIIb) is the α-subunit of the platelet membrane receptor GPIIb/IIIa, which plays a major role in platelet aggregation. Vitamin B6 has been reported to be an antiaggregative agent, although its mechanism is not well known. To understand the molecular mechanism of vitamin B6 on antiaggregation, we analyzed the effects of various forms of vitamin B6 on the expression of human GPIIb promoter using chloramphenicol acetyl transferase (CAT) as the reporter gene. The GPIIb promoter region was amplified by polymerase chain reaction (PCR), cloned into pBLCAT3 to drive the CAT reporter gene and transfected into human erythroleukemia (HEL) cells. Transient expression of the GPIIb promoter was determined after transfected cells were treated with 1 μm pyridoxine (PN), pyridoxal (PL), pyridoxal-5- phosphate (PLP), or 4-deoxypyridoxine (4-dex) for 48h. Our results show that the GPIIb promoter activity was down-regulated to 54, 35 and 63% in the presence of PN, PL and PLP, respectively, as compared to an untreated control whose promoter activity was 100%. However, no adverse effect on GPIIb promoter was detected by 4-dex, which is an antagonist of vitamin B6. The down-regulation effect of vitamin B6 on GPIIb promoter activity may lead to a reduction of GPIIb protein expression and thus be detrimental to platelet aggregation.

原文English
頁(從 - 到)471-479
頁數9
期刊Journal of Nutritional Science and Vitaminology
45
發行號4
DOIs
出版狀態Published - 1999

All Science Journal Classification (ASJC) codes

  • 醫藥(雜項)
  • 營養與營養學

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