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Horizon Discovery enters target discovery partnership with C4X Holdings
12-17-2018
by DDNews Staff  |  Email the author
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Cambridge, UK—Horizon Discovery Group, a global leader in the application of gene editing and gene modulation technologies, announced today an exclusive target discovery partnership with C4X Discovery Holdings, a pioneering drug discovery company.
 
The partnership aims to validate the novel synthetic lethal oncology targets that Horizon has identified using its cutting-edge CRISPR-Cas9 technology, with C4XD then using its proprietary 4D shape-based chemistry technology (Conformetrix) to discover preclinical drug candidates. The collaboration has been formed to deliver potential new drugs for patients with limited effective treatments, such as colorectal and lung cancer.
 
The concept of harnessing synthetic lethality in cancer has been demonstrated with the recent approval of the poly(ADP-ribose) polymerase (PARP) inhibitors Lynparza, Zejula and Rubraca. These drugs are effective in indications that are poorly served by immunotherapy drugs, such as checkpoint inhibitors, and have become an established treatment in ovarian cancer. They work by targeting a specific DNA repair pathway on which cancer cells, with mutations such as BRCA, become over-reliant. Inhibiting this critical DNA repair pathway causes the tumor cells to self-destruct, resulting in the terminology “synthetic lethality.” The pharmaceutical industry is now filling its clinical pipelines with investigational drugs, identified by empirical research, that might produce similar efficacy in cancers where PARP inhibitors are not effective.
 
Dr. Craig Fox, Chief Scientific Officer of C4XD said, “PARP inhibitors are transforming the treatment of ovarian cancer, particularly in patients with BRCA mutations and so identifying the next generation of synthetic lethality drug targets is a key priority to develop new therapies for cancer patients who are not responsive to current treatments. This partnership with Horizon gives C4XD access to a comprehensive proprietary CRISPR screening dataset that has selected the most promising novel drug targets in colon and lung cancer. We look forward to working with the highly experienced team at Horizon to complete the target validation package for these novel genes and initiate drug discovery programs to generate high value pre-clinical licensable assets for partnering.”
 
Recent advancements in the gene-editing tool, CRISPR-Cas9, has enabled systematic functional genomic screening to identify novel synthetic lethal genes in cancer cells with specific mutations. Horizon has utilized its target discovery platform to conduct high quality CRISPR gene knock-out studies across multiple cancer cell lines, screening ~3000 genes suitable as the basis for small molecule drug targets.
 
This cutting-edge approach has identified a shortlist of ~20 novel, high value synthetic lethal genes following a secondary screen to further validate them as targets. The partnership has been established to complete the target validation package for these novel targets, leading to the initiation of drug discovery programs by C4XD should it exercise its options on a target-by-target basis.
 
C4XD will fund the work plan and should C4XD discover pre-clinical drug candidates directed against these novel, synthetic lethality targets, it intends to out-license them to clinical development partners, with Horizon receiving an undisclosed share of revenue received by C4XD.
 
“Drugging the cancer genome now requires new synthetic lethal therapies that can exploit the vulnerabilities in patients’ tumors that are created by mutations in undruggable cancer driver gene,” added Dr. Jon Moore, Horizon’s Chief Scientific Officer. “Horizon’s internal research program has used powerful CRISPR technology to open a new window into how cancer cells are wired and has identified a cohort of novel targets. We are delighted to have secured this collaboration with C4X Discovery, which applies a powerful drug discovery engine to the first-in-class opportunities for transformational medicines represented by the targets Horizon has found and allows Horizon to share in the upside.”
 
Code: E12171801

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