There is a significant need for novel HIV therapies given the emergence of viruses resistant to existing drug regimens. The Rev-RRE protein-RNA interaction in HIV plays an essential role in the transport of viral mRNA from the nucleus to the cytoplasm where it can be translated or packaged. In preliminary work, two distinct assays targeting the HIV Rev protein identified structurally similar hits possessing a thienopyridine scaffold. Compounds of this class were subsequently shown to inhibit HIV replication and to exhibit low toxicity. An expanded study of the thienopyridine class using purchased analogs revealed clear structure-activity relationships (SAR), suggesting a well-defined molecular target and the potential for further improvement in potency through chemical optimization. Here, we propose to conduct a systematic structure-activity study of the thienopyridine family using synthesized analogs and employing a robust panel of antiviral, reporter, and ADME-Tox assays. The initial study of thienopyridines with purchased analogs provided useful information concerning pyridine ring SAR. However, a comprehensive evaluation of these compounds and the identification of the essential pharmacophore imbedded within them will require chemical synthesis. Thus, we plan to perform multiple rounds of analog synthesis and screening, allowing emerging SAR to guide further optimization. The successful conclusion of these studies will see the identification of one or more lead chemotypes, thus enabling lead optimization studies in a subsequent phase of work.

Public Health Relevance

A proposed structure-activity study of a promising Rev inhibitor is described. New analogs will be synthesized or procured from vendors and then tested for antiviral activity and drug-like properties.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Small Business Technology Transfer (STTR) Grants - Phase I (R41)
Project #
5R41AI076087-02
Application #
7754429
Study Section
Special Emphasis Panel (ZRG1-AARR-E (16))
Program Officer
Miller, Roger H
Project Start
2009-01-01
Project End
2011-12-31
Budget Start
2010-01-01
Budget End
2011-12-31
Support Year
2
Fiscal Year
2010
Total Cost
$288,691
Indirect Cost
Name
Advanced Genetic Systems, Inc.
Department
Type
DUNS #
154446921
City
San Francisco
State
CA
Country
United States
Zip Code
94122
Nakamura, Robert L; Burlingame, Mark A; Yang, Shumin et al. (2017) Identification and Optimization of Thienopyridine Carboxamides as Inhibitors of HIV Regulatory Complexes. Antimicrob Agents Chemother 61: