Guardant Health Announces Collaboration With AstraZeneca to Develop Companion Diagnostic to Identify Patients With ESR1-mutated Metastatic Breast Cancer

On December 8, 2022 Guardant Health, Inc. (Nasdaq: GH), a leading precision oncology company, reported that it has entered into a collaboration with AstraZeneca to pursue the development, regulatory approval and commercialization of the Guardant360 CDx blood test as a companion diagnostic to identify patients with ESR1-mutated metastatic breast cancer (Press release, Guardant Health, DEC 8, 2022, View Source [SID1234624952]). The initiative is part of a larger strategic collaboration investigating the use of liquid biopsy as a tool to inform early therapy intervention.

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The collaboration is one of the first to explore the potential of a comprehensive genomic profiling ctDNA (circulating tumor DNA) assay to identify mutation-driven resistance to a prior line of therapy in metastatic breast cancer. The Guardant360 CDx liquid biopsy test is being used to identify patients with detectable ESR1mutations in the SERENA-6 phase III clinical trial, which is evaluating camizestrant, a next-generation oral selective estrogen receptor degrader (ngSERD) being developed by AstraZeneca, in combination with CDK4/6 inhibitors versus aromatase inhibitors in combination with CDK4/6 inhibitors in patients with HR-positive, HER2-negative metastatic breast cancer.

"We’re pleased to collaborate with AstraZeneca on this important study for breast cancer patients," said Helmy Eltoukhy, Guardant Health chairman and co-CEO. "We look forward to exploring the potential benefit of early comprehensive genomic profiling using a simple blood draw, which can provide faster results than a tissue biopsy and enable clinicians to consider earlier intervention with the goal of achieving improved patient outcomes."

About Guardant Health

Guardant Health is a leading precision oncology company focused on helping conquer cancer globally through use of its proprietary tests, vast data sets and advanced analytics. The Guardant Health oncology platform leverages capabilities to drive commercial adoption, improve patient clinical outcomes and lower healthcare costs across all stages of the cancer care continuum. Guardant Health has commercially launched Guardant360, Guardant360 CDx, Guardant360 TissueNext, Guardant360 Response, and GuardantOMNI tests for advanced stage cancer patients, and Guardant Reveal for early-stage cancer patients. The Guardant Health screening portfolio, including the ShieldTM test, aims to address the needs of individuals eligible for cancer screening. For more information, visit guardanthealth.com and follow the company on LinkedIn and Twitter.