Kinnate Biopharma

Findings Highlight Unmet Medical Need in Cancer Patients with Class II and Class III BRAF Alterations Who May Not Have Access to Approved Targeted Therapies

SAN FRANCISCO and SAN DIEGO, March 07, 2022 (GLOBE NEWSWIRE) — Kinnate Biopharma Inc. (Nasdaq: KNTE) (“Kinnate”), a biopharmaceutical company focused on the discovery and development of small molecule kinase inhibitors for treat genomically defined cancers, today announced the presentation of the results of a collaborative study with Tempus investigating the prevalence of Class II and Class III alterations in patients with BRAF-mutated solid tumors. These results were presented as an e-poster at the Virtual Congress on Targeted Cancer Therapies (TAT) of the European Society for Medical Oncology (ESMO), taking place March 7-9, 2022.

“Advances in genomic profiling have greatly increased our ability to define emerging patient populations and have enabled the development of effective targeted therapies for patients who do not currently benefit from precision medicine approaches,” said Richard Williams, MBBS , Ph.D., Chief Medical Officer at Kinnate. “Through our collaboration with Tempus and other leading precision medicine companies, we have found that there are a significant number of cancer patients with Class II or Class III BRAF alterations, none of whom have access to approved targeted cancer therapies. We appreciate the opportunity to share information about this urgent unmet need with the clinical research community gathered for the ESMO TAT 2022 conference.”

This study used an anonymized clinicogenomic database of over 55,000 cancer patients whose tumors were profiled using the Tempus xT next-generation sequencing assay, a 648-gene paired DNA panel to RNA transcriptome sequencing. A cohort of more than 1,100 patients has been identified with BRAF class II or class III oncogenic alterations representing approximately 2% of patients. Among patients with class II or class III BRAF alterations, those diagnosed with melanoma or non-small cell lung cancer (NSCLC) were most often treated with immunotherapy or chemotherapy +/- immunotherapy, respectively. At least 70% of patients with BRAF alterations had stage IV (metastatic) disease, and the cancer stage distribution was similar across all BRAF classes. Compared to BRAF class I alterations, BRAF class II and class III alterations were more likely to coexist with other genetic alterations in the MAPK pathway such as NRAS, KRAS, and NF1. Within the NSCLC and melanoma cohort, tumors with class II or class III BRAF alterations had a higher tumor mutation burden (TMB) than wild-type BRAF tumors. Additionally, patients with NSCLC and Class II or Class III alterations experienced a shorter time to treatment discontinuation in first and second line treatment compared to patients with NSCLC and Class I BRAF alterations, suggesting inferior treatment outcomes.

“These results are particularly interesting given that BRAF Class II and Class III alterations are prevalent oncogenic drivers without approved targeted therapy. Tumors with BRAF Class II or Class III alterations have been shown to be associated with unique tumor characteristics, including higher BMR and more frequent co-occurrence with other MAPK pathway alterations Our study of real-world data indicates that patients with NSCLC and BRAF class II alterations or class III experience a shorter time to discontinuation compared to patients with NSCLC and class I BRAF alterations,” said Paul Severson, Ph.D., senior director of Translational Medicine and Bioinformatics at Kinnate.

The e-Poster (Presentation #40P), entitled “Real-world clinical genomic analysis of patients with BRAF-mutant cancers identifies BRAF classes II and III as a population of unmet medical needwill be presented by Dr. Severson and is available to registered participants for on-demand viewing at: www.esmo.org/meetings/esmo-tat-2022.

About Kinnate
Kinnate is focused on the discovery and development of small molecule kinase inhibitors for difficult-to-treat, genomically defined cancers. Kinnate’s mission is to expand the reach of targeted therapies by developing products designed to address significant unmet needs. Kinnate uses its deep expertise in structure-based drug discovery, translational research and patient-focused precision medicine, which it calls the Kinnate Discovery Engine, to develop targeted therapies. Based in San Francisco and San Diego, California, Kinnate’s team is comprised of drug discovery experts supported by a distinguished group of scientific advisors. For more information, please visit www.kinnate.com.

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