On April 20, 2022 Repare Therapeutics Inc. ("Repare" or the "Company") (Nasdaq: RPTX), a leading clinical-stage precision oncology company, reported that preclinical data demonstrating inhibition of CCNE1-amplified tumor growth in vivo by selective inhibition of PKMYT1 using RP-6306, a first-in-class small molecule candidate targeting PKMYT1, were published in Nature (Press release, Repare Therapeutics, APR 20, 2022, View Source [SID1234612597]). SNIPRx, Repare’s proprietary, genome-wide, CRISPR-based screening approach, was used to uncover CCNE1 amplification as synthetic lethal to PKMYT1 inhibition.
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The article, entitled "CCNE1 amplification is synthetic lethal with PKMYT1 kinase inhibition" is available at www.nature.com.
"RP-6306 is a first-in-class and highly selective PKMYT1 inhibitor, and these preclinical data show its ability to target CCNE1-amplfied tumors and profoundly inhibit tumor growth," said Michael Zinda, PhD, EVP and Chief Scientific Officer of Repare. "We are excited as this is another example of the power of genetic interaction screens to uncover new oncology drug targets, in this case in a cellular model of CCNE1 amplification. This led to the identification of a previously uncharacterized vulnerability to PKMYT1 inhibition that spurred the development of RP-6306 by Repare Therapeutics."
"We are thrilled that this work demonstrates both the power of our CRISPR-based SNIPRx platform to uncover novel synthetic lethal targets and Repare’s capacity to prosecute these targets resulting in first-in-class small molecule therapeutics," said Maria Koehler, MD, PhD, EVP and Chief Medical Officer of Repare. "It is uncommon that a new and validated target is published in a top tier journal concurrent with a launched clinical trial for a candidate drug on that target, and this speaks volumes about the innovative capacity of Repare and its collaborators."
Phase 1 clinical trials are currently evaluating RP-6306 as a monotherapy as well as in combination with gemcitabine for the treatment of molecularly selected advanced solid tumors. The Company recently initiated an additional Phase 1 MINOTAUR clinical trial of RP-6306 in combination with FOLFIRI also for the treatment of molecularly selected advanced solid tumors.
This work is the result of a long-standing collaboration between Repare Therapeutics and the laboratory of Daniel Durocher, PhD, a Senior Investigator at the Lunenfeld-Tanenbaum Research Institute, part of Sinai Health, in Toronto, Canada Dr. Durocher is also a Professor in the Department of Molecular Genetics at the University of Toronto. Work on CCNE1 in the Durocher laboratory was led by David Gallo, PhD, now a Senior Scientist at Repare and was financially supported by Repare Therapeutics and the Canadian Institutes of Health Research (CIHR).
About Repare Therapeutics’ SNIPRx Platform
Repare’s SNIPRx platform is a genome-wide CRISPR-based screening approach that utilizes proprietary isogenic cell lines to identify novel and known synthetic lethal gene pairs and the corresponding patients who are most likely to benefit from the Company’s therapies based on the genetic profile of their tumors. Repare’s platform enables the development of precision therapeutics in patients whose tumors contain one or more genomic alterations identified by SNIPRx screening, in order to selectively target those tumors in patients most likely to achieve clinical benefit from resulting product candidates.