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Development of Cell-type specific anti-HIV gp120 aptamers for siRNA delivery
Published on: June 23, 2011
Aptamer-containing surfaces for selective capture of CD4 expressing cells
Qing Zhou1, Ying Liu, Dong-Sik Shin
1Department of Biomedical Engineering, University of California, Davis, California 95616, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|August 4, 2012
Summary
RNA aptamers offer a stable alternative to antibodies for capturing CD4 cells. These aptamer surfaces demonstrate high purity and efficiency, paving the way for advanced HIV/AIDS diagnostic devices.
Area of Science:
- Biotechnology
- Materials Science
- Immunology
Background:
- Aptamers are emerging as superior alternatives to antibodies due to their stability and ease of modification.
- CD4 antigen detection is crucial for HIV/AIDS diagnosis and monitoring.
Purpose of the Study:
- To develop and characterize an aptamer-based surface for efficient capture of CD4 antigen-expressing cells.
- To evaluate the performance of aptamer surfaces compared to antibody-based methods.
Main Methods:
- Surface modification of glass/silicon with RNA aptamers targeting CD4.
- Characterization using ellipsometry to confirm biointerface assembly.
- Testing capture efficiency with CD4+ and CD4- cell lines and mixtures.
Main Results:
- Aptamer-functionalized surfaces demonstrated comparable capture efficiency to anti-CD4 antibody substrates.
- Achieved 94% purity of CD4 cells from a complex mixture containing 15% CD4+ cells.
- Successful specific capture of recombinant CD4 protein was confirmed.
Conclusions:
- Aptamer-based surfaces provide a robust platform for specific cell capture.
- These aptamer devices hold promise for developing novel, cost-effective cell detection strategies for HIV/AIDS monitoring.
- Potential for more stable and less expensive blood analysis devices.
