SELLAS Life Sciences Announces Additional Positive Triple Negative Breast Cancer (TNBC) Subgroup Data

SELLAS Life Sciences (Nasdaq:SLS) a clinical-stage biopharmaceutical company focused on the development of novel cancer immunotherapies for a broad range of cancer indications, today announced additional data on patterns of clinical relapses (including organ or site of recurrence), as well as results from a preplanned secondary efficacy analysis across various predefined subgroups from the prospective, randomized, single-blinded, controlled Phase 2b independent investigator-sponsored clinical trial of the combination of trastuzumab (Herceptin®) +/- nelipepimut-S (NeuVax™, NPS) targeting HER2 low-expressing breast cancer patient cohorts at the 41^st San Antonio Breast Cancer Symposium (SABCS) in San Antonio, TX.

As quoted in the press release:

“These new data provide insights on the pattern of clinically detectable relapses across various sites/organs, as well as add to our knowledge of the specific potential benefit distribution within the TNBC cohort. The results in four predefined TNBC subgroups inform us of the types of TNBC patients with residual disease after neoadjuvant chemotherapy who may potentially benefit when treated with NPS plus trastuzumab in the adjuvant setting. As previously announced, we are on track to meet with the U.S. Food and Drug Administration this month on the most expeditious and appropriate development path for NPS in TNBC,” said Nicholas J. Sarlis, MD, PhD, Executive Vice President and Chief Medical Officer of SELLAS.

“We are very pleased with the results of these new analyses which indicate that the NPS plus trastuzumab combination – when given in the adjuvant setting after frontline therapy – could potentially improve outcomes across specific predefined subgroups of patients with early-stage TNBC, an aggressive subtype of breast cancer. The clinically meaningful and statistically significant decrease in the frequency of clinically detectable relapses – with a median follow-up of over 26 months – indicates a high degree of internal consistency,” commented Elizabeth A. Mittendorf, MD, PhD, Rob and Karen Hale Distinguished Chair in Surgical Oncology, Director of Research, Breast Surgical Oncology Brigham and Women’s Hospital, Director, Breast Immuno-Oncology Program Dana-Farber/Brigham and Women’s Cancer Center, and the Principal Investigator of the Phase 2b study. “The data presented today are consistent with the previously reported beneficial effect seen in the TNBC cohort at large and are consistent with the immunobiological mechanism of action of nelipepimut-S.”

Click here to read the full press release.