Selection and Characterization of an α6β4 Integrin blocking DNA Aptamer.
Selection and Characterization of an α6β4 Integrin blocking DNA Aptamer.
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DOI:
10.1038/mtna.2016.10
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发表时间:
2016-03-15
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The heterodimeric laminin receptor α6β4 integrin plays a central role in the promotion of tumor cell growth, invasion, and organotropic metastasis. As an overproduction of the integrin is often linked to a poor prognosis, the inhibition of integrin α6β4 binding to laminin is of high therapeutical interest. Here, we report on the combination of a cell-systematic evolution of ligands by exponential enrichment and a bead-based selection resulting in the first aptamer inhibiting the interaction between α6β4 integrin and laminin-332. This Integrin α6β4-specific DNA Aptamer (IDA) inhibits the adhesion of prostate cancer cells (PC-3) to laminin-332 with an IC50 value of 149 nmol/l. The Kd value concerning the aptamer's interaction with PC-3 cells amounts to 137 nmol/l. Further characterization showed specificity to α6 integrins and a half-life in murine blood plasma of 6 hours. Two truncated versions of the aptamer retained their binding capacity, but lost their ability to inhibit the interaction between laminin-332 and PC-3 cells. Confocal laser scanning microscope studies revealed that the aptamer was internalized into PC-3-cells. Therefore, in addition to the adhesion-blocking function of this aptamer, IDA could also be applied for the delivery of siRNA, microRNA or toxins to cancer cells presenting the integrin α6β4.
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DOI:
10.3390/molecules15010001
发表时间:
2009-12-24
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
作者:
Avci-Adali M;Paul A;Wilhelm N;Ziemer G;Wendel HP
通讯作者:
Wendel HP
影响因子:
2.4
作者:
Gerson KD;Maddula VS;Seligmann BE;Shearstone JR;Khan A;Mercurio AM
通讯作者:
Mercurio AM
影响因子:
4.1
作者:
Mittelberger, Florian;Meyer, Cindy;Hahn, Ulrich
通讯作者:
Hahn, Ulrich
影响因子:
7.5
作者:
Margadant, Coert;Monsuur, Hanneke N.;Sonnenberg, Arnoud
通讯作者:
Sonnenberg, Arnoud
影响因子:
13.6
作者:
Kulkarni, Onkar;Pawar, Rahul D.;Anders, Hans-Joachim
通讯作者:
Anders, Hans-Joachim