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Antiviral Nucleoside Inhibitors

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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization

Nucleoside Triphosphates - From Synthesis to Biochemical Characterization

Published on: April 3, 2014

Specific VDAC inhibitors: phosphorothioate oligonucleotides.

C A Stein¹, Marco Colombini

¹Albert Einstein-Montefiore Cancer Center, Department of Oncology, Montefiore Medical Center, Bronx, NY 10467, USA. cstein@montefiore.org

Journal of Bioenergetics and Biomembranes

|July 26, 2008

Summary

Phosphorothioate oligonucleotides are potent, specific inhibitors of voltage-gated anion channels (VDAC) in mitochondria. These novel molecules effectively block VDAC channels at low concentrations without impacting other key mitochondrial functions.

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Chemical Triphosphorylation of Oligonucleotides

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Area of Science:

Biochemistry
Cell Biology
Mitochondrial Physiology

Background:

Voltage-gated anion channels (VDAC) are crucial for metabolite transport across the mitochondrial outer membrane.
VDAC plays a role in apoptosis and other cellular processes.
Lack of specific VDAC inhibitors has previously limited research.

Purpose of the Study:

To introduce phosphorothioate oligonucleotides as specific inhibitors of VDAC channels.
To evaluate the efficacy and specificity of these oligonucleotides in blocking VDAC function.

Main Methods:

Utilized phosphorothioate oligonucleotides designed for stability and VDAC binding.
Assessed VDAC channel blockade at 1 microM concentration.
Monitored effects on mitochondrial respiration complexes, adenine nucleotide translocator, and ATP synthase.

Main Results:

Phosphorothioate oligonucleotides potently and specifically block VDAC channels.
Blockade occurs at a concentration of 1 microM.
No significant impact on respiration complexes, adenine nucleotide translocator, or ATP synthase was observed.

Conclusions:

Phosphorothioate oligonucleotides are effective and specific inhibitors of VDAC channels.
These molecules offer a valuable tool for studying VDAC function in cellular processes like apoptosis.
The availability of these specific inhibitors overcomes previous research limitations.