Montreal and Boston-based Repare Therapeutics, a developer of drugs that treat cancer, has raised $68 million in Series A financing.

Founding investor Versant Ventures co-led the round with MPM Capital. They were joined by other syndicate investors including a US $8.75 million investment from the Fonds de solidarité FTQ, and further investments from Celgene Switzerland, an affiliate of Celgene Corporation, and BDC Capital’s Healthcare Venture Fund.

With this financing, Repare, founded by Versant Ventures, emerges from Versant’s Discovery Engines after an 18 month stealth period. During that time, the company advanced its leading CRISPR-enabled synthetic lethality drug discovery platform, identified several promising oncology targets and moved multiple programs into preclinical development.

“Versant’s commitment to and confidence in Repare’s distinct science has enabled the company to build the team, operations and initial programs away from the spotlight,” said Repare CEO Lloyd M. Segal. “With the added leadership of MPM and this syndicate, we are financed to achieve our goal of testing our multiple new, precision oncology therapeutics in a clinical setting.”

Repare’s platform and pipeline of novel medicines target genetically defined weaknesses of cancers. The core concept of synthetic lethality is that while a tumor can tolerate individual defects in its DNA, there exist combinations of defects that lead to the malignancy’s destruction. The recent approvals of several PARP inhibitors provide clear proof-of-principle for the approach of inducing synthetic lethality. Repare and its founders have developed large-scale and novel methods for discovering additional drug targets that, when inhibited, may induce synthetic lethality. New drugs directed at these targets hold promise to improve cancer treatment both as single therapies and in combination with existing drugs and treatments.

To further guide this important investment both Jerel Davis, Ph.D., managing director at Versant, and Todd Foley, managing director at MPM Capital, will join Repare’s board of directors.

“The fields of synthetic lethality and DNA repair have a rich, 20-year history and are poised to deliver impactful new cancer treatments,” said Davis. “We are impressed by the speed and precision with which Repare, in collaboration with its founders and scientific advisors, generated impressive insights and multiple novel targets.”

Repare’s first disclosed program targets DNA-directed DNA polymerase theta (PolQ), a central component of a pathway that repairs double-strand breaks in cancer cells. NYU School of Medicine has licensed to Repare exclusive rights to drug discovery work targeting PolQ, developed by Dr. Sfeir with the support of NYU Office of Therapeutics Alliances (OTA). This unique polymerase is highly expressed in ovarian, breast and a number of other cancers. In parallel, Repare is progressing several additional programs, with an aim to put its first compound in the clinic in 2019.

“We evaluated nearly every opportunity in the synthetic lethality space and have complete conviction that Repare, its founders and its SAB members represent the leaders in the field,” said Foley. “MPM is dedicated to investing in and building companies that seek to find cures for cancer and save lives and we look forward to the advancement of Repare’s programs and the development of these meaningful medicines.”