Clovis Oncology and Immunomedics Announce Planned Clinical Collaboration to Study Combination Therapies in Metastatic Triple-Negative Breast and Urothelial Cancers

Companies to Start Phase 1/2 Study to Evaluate the Combination of Rubraca® (Rucaparib) and Sacituzumab Govitecan in Patients with Metastatic Triple-negative Breast Cancer and Metastatic Urothelial Cancer

BOULDER, CO and MORRIS PLAINS, NJ, USA I June 03, 2018 I Clovis Oncology, Inc. (NASDAQ:CLVS) and Immunomedics, Inc., (NASDAQ:IMMU) today announced their intent to enter into a clinical collaboration to investigate the combination of Clovis’ Rubraca® (rucaparib), a poly (ADP ribose) polymerase inhibitor (PARPi), and Immunomedics’ lead antibody-drug conjugate (ADC) product candidate, sacituzumab govitecan, as a treatment of patients with metastatic triple-negative breast cancer (mTNBC) and metastatic urothelial cancer (mUC). The planned phase 1/2 study will include an initial safety cohort followed by expansion cohorts in each of mTNBC and mUC.

“We look forward to entering this important co-development partnership with Clovis, one of the leading innovative biotech companies, to fully leverage the scientific expertise of both companies and expand the potential for two very active agents,” said Usama Malik, Chief Business Officer of Immunomedics. “There is synergy between PARPi and sacituzumab govitecan in preclinical models regardless of BRCA mutation status. This partnership will hopefully provide clinical validation for this exciting concept and bring new treatment options to disease settings with high unmet medical need.”

“We are very pleased to partner with Immunomedics and are very enthusiastic about the potential synergy between rucaparib and sacituzumab govitecan,” said Patrick J. Mahaffy, President and Chief Executive Officer of Clovis Oncology. “Our plan to initiate new combination studies with Immunomedics further expands our clinical development efforts in both advanced breast and bladder cancers, where there is tremendous need for new treatment options.”

In preclinical studies, the combination of sacituzumab govitecan and rucaparib in TNBC cell lines in vitro resulted in synergistic growth inhibition regardless of BRCA1/2 status. In addition, the combination of sacituzumab govitecan and a PARPi also demonstrated significant antitumor effects above that observed with monotherapy in BRCA wild-type and mutant animal models of TNBC.1

“There is an opportunity to develop new treatment options for patients in the mTNBC and mUC space through our planned collaboration with Clovis Oncology, as well as potentially pursuing other indications in the future,” stated Dr. Robert Iannone, Head of Research & Development and Chief Medical Officer of Immunomedics. “We are excited by the prospect that our unique ADC in combination with rucaparib could help fill a gap in treatment for cancer patients who have few available options.”   


  1. Cardillo TM, Sharkey RM, Rossi DL, et al. Synthetic lethality exploitation by an anti-Trop-2-SN-38 antibody-drug conjugate, IMMU-132, plus PARP inhibitors in BRCA1/2-wild-type triple-negative breast cancer. Clin Cancer Res. 2017 Jul 1;23(13):3405-3415.

About Sacituzumab Govitecan

Sacituzumab govitecan, Immunomedics’ most advanced product candidate, is a novel, first-in-class antibody-drug conjugate (ADC). It is currently under review by the U.S. Food and Drug Administration for accelerated approval as a treatment of patients with triple-negative breast cancer who previously received at least two prior therapies for metastatic disease. If approved, sacituzumab govitecan would be the first and only ADC approved for the treatment of metastatic triple negative breast cancer.

About Rubraca

Rubraca is an oral, small molecule inhibitor of PARP1, PARP2 and PARP3 being developed in multiple tumor types, including ovarian, metastatic castration-resistant prostate, and bladder cancers, as monotherapy, and in combination with other anti-cancer agents. Exploratory studies in other tumor types are also underway. Clovis holds worldwide rights for Rubraca. Rubraca is an unlicensed medical product outside of the U.S. and EU.

Rubraca U.S. FDA Approved Indications and Important Safety Information
Rubraca is indicated as monotherapy for the maintenance treatment of adult patients with recurrent epithelial ovarian, fallopian tube, or primary peritoneal cancer who are in a complete or partial response to platinum-based chemotherapy.

Rubraca is indicated as monotherapy for the treatment of adult patients with deleterious BRCA mutation (germline and/or somatic) associated epithelial ovarian, fallopian tube, or primary peritoneal cancer who have been treated with two or more chemotherapies and selected for therapy based on an FDA-approved companion diagnostic for Rubraca.

About Immunomedics
Immunomedics is a clinical-stage biopharmaceutical company developing monoclonal antibody-based products for the targeted treatment of cancer and other serious diseases. Immunomedics’ corporate objective is to become a fully-integrated biopharmaceutical company and a leader in the field of antibody-drug conjugates. For additional information on the Company, please visit its website at The information on its website does not, however, form a part of this press release.

About Clovis Oncology
Clovis Oncology, Inc. is a biopharmaceutical company focused on acquiring, developing and commercializing innovative anti-cancer agents in the U.S., Europe and additional international markets. Clovis Oncology targets development programs at specific subsets of cancer populations, and simultaneously develops, with partners, diagnostic tools intended to direct a compound in development to the population that is most likely to benefit from its use. Clovis Oncology is headquartered in Boulder, Colorado, and has additional offices in San Francisco, California and Cambridge, UK. Please visit for more information.

SOURCE: Clovis Oncology

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