Ionizing irradiation induces RNAs in cells which can be targeted prior to irradiation by siRNA to identify novel targets for radioprotector drugs. We have successfully used this strategy to identify a co,mmon drug, Glyburide, as a novel radioprotector. We now propose to apply this strategy to identify radiation mitigator drugs using radiosensitive human cell targets and siRNA screening after irradiation. The 1** Specific Aim will optimize and deploy sentinel cells for detecting RNA targets for new mitigator drugs.
The second aim will be to use druggable siRNA libraries and small molecule libraries to identify radiation damage mitigators.
The third aim will be to identify targets that interact positively with prioritized drugs to advance radiation mitigation effects.

Public Health Relevance

We have successfully proven that siRNA library screening can be used to identify radioprotector drugs among commonly available pharmacologic agents. This same strategy will identify mitigator drugs that may be available in the existing pharmacopea and their interaction with prioritized compounds developed already in the CMCR..

National Institute of Health (NIH)
National Institute of Allergy and Infectious Diseases (NIAID)
Research Program--Cooperative Agreements (U19)
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Special Emphasis Panel (ZAI1-KS-I)
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University of Pittsburgh
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