Quantum dot-antisense oligonucleotide conjugates for multifunctional gene transfection, mRNA regulation, and tracking of biological processes

Yilin Li, Xin Duan, Lihong Jing, Chunhui Yang, Ruirui Qiao, Mingyuan Gao

Research output: Contribution to journalArticleResearchpeer-review

43 Citations (Scopus)


It was demonstrated that oligonucleotides, independent of their base sequence and length, could effectively induce the cellular uptake of mercapto acid-capped CdTe QDs after the oligonucleotides were covalently attached on the surface of the QDs. Following these experimental observations, a conjugate composed of covalently linked anti-survivin antisense oligonucleotides (ASON) and CdTe QDs was designed and synthesized. Then, the survivin mRNA down-regulation and the apoptosis of HeLa cells induced by ASON were studied. Systematic experimental results revealed that CdTe-ASON could effectively induce the apoptosis of HeLa cells, while CdTe QDs offered the possibility to visualize the specific intracellular localization of the CdTe-ASON probes strongly associated with their biological functions.

Original languageEnglish
Pages (from-to)1923-1931
Number of pages9
Issue number7
Publication statusPublished - Mar 2011
Externally publishedYes


  • Antisense oligonucleotides
  • Apoptosis
  • CdTe QDs
  • Gene transfection
  • Intracellular localization

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