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Noninvasive Genotyping of Dopamine Receptor D4 (DRD4) UsingNanograms of DNA From Substance-Dependent Patients

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A noninvasive DNA sampling method has been implemented collecting buccalmucosa cells by cotton wool swabs. An amount of 0.2-2 μg DNA per patient wasobtained after the phenol-extraction procedure and 0.2-2 ng DNA template wassufficient for PCR amplification of the polymorphic 48 basepair repeat region of dopaminereceptor D4 (DRD4) gene. PCR products were visualized during microfabricated electrophoretic separationby laser-induced fluorescent detection and automatic data registration. Initial data of genotyping drugdependentsubjects shows a relatively high ratio of heterozygotes, possessing either longer or shorter variantsbeside the common 4-repeat DRD4 allele.

Keywords: buccal swab; doamine d4 recetor; genotyping; noninvasive dna samling

Document Type: Review Article


Publication date: 2002-04-01

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