Human dopamine transporter gene: differential regulation of 18-kb haplotypes.

Human dopamine transporter gene: differential regulation of 18-kb haplotypes.
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DOI:
10.2217/pgs.13.141
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发表时间:
2013-09
期刊:
影响因子:
2.1
通讯作者:
Lin Z
Lin Z
中科院分区:
医学4区
文献类型:
--
作者:
Zhao Y;Xiong N;Liu Y;Zhou Y;Li N;Qing H;Lin Z

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Since previous functional studies of short haplotypes and polymorphic sites of SLC6A3 have shown variant-dependent and drug-sensitive promoter activity, this study aimed to understand whether a large SLC6A3 regulatory region, containing these small haplotypes and polymorphic sites, can display haplotype-dependent promoter activity in a drug-sensitive and pathway-related manner. By creating and using a single copy number luciferase-reporter vector, we examined regulation of two different SLC6A3 haplotypes (A and B) of the 5′ 18-kb promoter and two known downstream regulatory variable number tandem repeats by 17 drugs in four different cellular models. The two regulatory haplotypes displayed up to 3.2-fold difference in promoter activity. The regulations were drug selective (37.5% of the drugs showed effects), and both haplotype and cell type dependent. Pathway analysis revealed at least 13 main signaling hubs targeting SLC6A3, including histone deacetylation, AKT, PKC and CK2 α-chains. SLC6A3 may be regulated via either its promoter or the variable number tandem repeats independently by specific signaling pathways and in a haplotype-dependent manner. Furthermore, we have developed the first pathway map for SLC6A3 regulation. These findings provide a framework for understanding complex and variant-dependent regulations of SLC6A3.
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