title: Preventing the formation of positive transcription elongation factor b by human cyclin T1-binding RNA aptamer for anti-HIV transcription.
abstract: OBJECTIVE
  Development of an innovative antitranscriptional technique for HIV.
  
  
  METHODS
  Systematic evolution of ligands by exponential enrichment (SELEX) technique that can characterize target-specific aptamer was employed to synthesize an aptamer that binds human cyclin T1 (CycT1). When CycT1-binding aptamer interferes the binding of cyclin-dependent kinase 9 (Cdk9) to CycT1, HIV transcription is likely to be discouraged.
  
  
  METHODS
  Throughout SELEX steps, RNA aptamers having high specific affinity toward CycT1 were characterized. The binding interaction between selected aptamers and CycT1 was analyzed via various techniques.
  
  
  RESULTS
  Both qualitative and quantitative analyses revealed Apt4 aptamer, among four candidates, has the highest specific affinity to CycT1. In the presence of Apt4, Cdk9 protein was unable to make interaction with CycT1.
  
  
  CONCLUSIONS
  A specific RNA aptamer that identifies and binds to CycT1 with high affinity was successfully characterized. As CycT1 plays an important role in HIV transcription, this novel method that interferes and inhibits the transcription of HIV has the potential of being exploited in extended research fields, such as clinical therapy.
authors.affiliation: Department of Microbiology, Chungbuk National University, Cheongju, Republic of Korea.
authors.forename: Hyun-Ju
authors.initials: HJ
authors.lastname: Um
authors.forename: Mina
authors.initials: M
authors.lastname: Kim
authors.forename: Sang-Hee
authors.initials: SH
authors.lastname: Lee
authors.forename: Yang-Hoon
authors.initials: YH
authors.lastname: Kim
mesh_terms: D052157:Aptamers, Nucleotide / Q000235:genetics*; D056906:Cyclin T / Q000235:genetics / Q000378:metabolism*; D042863:Cyclin-Dependent Kinase 9 / Q000235:genetics / Q000378:metabolism*; D015696:Gene Products, tat / Q000235:genetics; D016325:HIV Long Terminal Repeat / Q000235:genetics; D015497:HIV-1 / Q000235:genetics / Q000502:physiology*; D006801:Humans; D042925:Positive Transcriptional Elongation Factor B / Q000235:genetics / Q000378:metabolism*; D011485:Protein Binding; D012367:RNA, Viral; D054322:tat Gene Products, Human Immunodeficiency Virus / Q000235:genetics / Q000378:metabolism*
chemical_list: D052157:Aptamers, Nucleotide; C503684:CCNT1 protein, human; D056906:Cyclin T; D015696:Gene Products, tat; D012367:RNA, Viral; D054322:tat Gene Products, Human Immunodeficiency Virus; D042925:Positive Transcriptional Elongation Factor B; D042863:Cyclin-Dependent Kinase 9