Highly Potent and Selective Deubiquitinating Enzyme Inhibitor


Available for licensing are inhibitors that target the USP1/ UAF1 deubiquitinating enzyme (DUB) complex. The FDA approval and commercial success of VelcadeĀ®, a small molecule proteasome inhibitor, has established the ubiquitin-proteasome system (UPS) as a valid target for anticancer treatment. However, proteasome inhibitors in general suffer from a narrow therapeutic index and acquired resistance. A promising alternative to proteasome inhibition has been to target the enzymes upstream of proteasome-mediated protein degradation, i.e. the ubiquitin conjugation and deconjugation, to generate more specific, less toxic therapeutic agents. The investigators have developed small molecules that target the USP1/ UAF1 DUB complex that acts upstream of UPS and has been implicated in the DNA damage response. These compounds are the most potent and selective DUB inhibitors reported to date. Moreover, the inhibitors act synergistically with cisplatin, a DNA damaging anti-cancer drug, to overcome chemoresistance and enhance cytotoxicity. These results suggest the inhibitors may also improve the efficacy and potency of other commonly prescribed chemotherapeutic agents that are known to induce DNA damage.

Potential Commercial Applications: Competitive Advantages:
  • Method to treat cancer
  • Method to overcome chemoresistance to cisplatin
  • Pharmaceutical compositions
 
  • Represents the most potent and selective DUB inhibitor reported to date.
  • Promising alternative to proteasome inhibition offering the potential of more selective and less toxic therapeutic agents.
  • Acts synergistically with DNA damaging agents to overcome chemoresistance.


Related Inventoion(s):
E-231-2002/0
E-070-2005/0
E-208-2007/0
E-156-2012/0


Inventors:
David Maloney (NCATS)
Andrew Rosenthal (NCATS)
Ajit Jadhav (NCATS)
Thomas Dexheimer (NCATS)
Anton Simeonov (NCATS)
Qin Liang
Zhihao Zhuang


Intellectual Property:
US Application No. 61/747,052
PCT Application No. PCT/US2013/077804

Publications:
Liang Q, et al. PMID 24531842
Singhal S, et al. PMID 19007433
Reyes-Turcu FE, et al. PMID 19489724
Hussain S, et al. PMID 19448430
Oestergaard VH, et al. PMID 18082605
Kim JM, et al. PMID 19217432
Chen J, et al. PMID 22118673

Collaboration Opportunity:

The National Center for Advancing Translational Sciences is seeking statements of capability or interest from parties interested in collaborative research to further develop, evaluate or commercialize this invention. For collaboration opportunities, please contact Lili Portilla at lili.portilla@nih.gov or 301-217-2589, or Dr. Krishna Balakrishnan at balakrik@mail.nih.gov or 301-217-2336. A notice was published in the Federal Register on Tuesday, June 24, 2014 detailing this opportunity: https://federalregister.gov/a/2014-14719.


Licensing Contact:
Jennifer Wong , M.S.
NIH Office of Technology Transfer
Email: wongje@mail.nih.gov
Phone: 301-435-4633

OTT Reference No: E-043-2013/0

Updated: Jun-24-2014