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Development of a Quantum Dot-based Assay System for Detection of Specific HIV-1 LTR Sequence Variants

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Analysis of human immunodeficiency virus type 1 (HIV-1) long terminal repeat (LTR) sequence variation within the CCAAT/enhancer binding protein (C/EBP) and stimulating protein (Sp) transcription factor binding sites has identified variants that correlate with HIV-associated dementia (HIVD). CdSe/ZnS nanocrytsals have facilitated the investigation of nano- and peco-scale biological components. Quantum dot-conjugated oligonucleotides homologous to specific variants of Sp site III and C/EBP site I, were utilized to quantitate the relative abundance of specific LTR variants. Quantum dot-conjugated oligonucleotides containing the Sp site III 5T binding site variant (C-to-T change at position 5) or the C/EBP site I 3T site variant, were reacted with plasmid DNA containing increasing concentrations of plasmid with the homologous LTR sequence variant. The results suggest that quantum dot-conjugated oligonucleotides specific for sequence variants within the LTR can be used as reporter molecules for identification and quantitation of HIV-1 genetic variation.

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Correspondence to Asiedua Asante.

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  • Human Immunodeficiency Virus
  • Dementia
  • Long Terminal Repeat
  • Transcription Factor Binding
  • Transcription Factor Binding Site