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Aptamers: Promising Molecules for Cancer Stem Cell Targeting | OMICS International
ISSN: 1747-0862
Journal of Molecular and Genetic Medicine
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Aptamers: Promising Molecules for Cancer Stem Cell Targeting

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The term Cancer Stem Cells (CSCs) has been coined to refer to a subpopulation of tumor cells that has the ability to self-renew and to generate the diverse cell pool of a given tumor. In the last decade CSCs have been receiving a lot of interest due to their cancer initiating and maintaining capabilities making them the real driving force within a malignant mass that pushes towards more aggressive proliferation and more resistance against anticancer drugs. These cells have been linked to different specific markers in an attempt to achieve efficient isolation and characterization. Such markers include CD44, EpCAM and CD133 among others.
Aptamers are synthetic single stranded oligonucleotides selected from a huge pool of random sequences which can fold and bind to a wide range of targets with high affinity and specificity. They are not immunogenic or toxic and have good clearance rates, qualities that make aptamers a good rival to monoclonal antibodies in their diagnostic as well as therapeutic applications.
This review explores the potential applications of aptamers selected to target the main markers of CSCs. Such applications include diagnostic assays and analytical platforms where such aptamers can be utilized to detect and characterize the behavior of these cells in addition to predicting and monitoring disease course and response to different treatment regimens. The potential therapeutic applications are also discussed in details, where such anti- CSC aptamers can be used in a variety of formulations to efficiently target the initiating cores of tumors.

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