The company, citing its IMpassion130 study, said it also recorded an
encouraging overall survival benefit for the PD-L1 positive
population, whose tumors express a protein that help them evade
immune system detection, at interim analysis.
The Basel-based company called this the first Phase III
immunotherapy study in first-line metastatic triple negative breast
cancer to demonstrate a statistically significant improvement in
progression-free survival in key patient groups, including the
conservative intention-to-treat population.
Patients with triple-negative breast cancer test negative for
hormone receptors or HER2, meaning their tumors do not respond to
hormone therapy or to therapies like Roche's $7 billion-per-year
blockbuster Herceptin.
As a result, there is significant interest in finding new, better
ways to tackle this form of the disease.
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"Highly encouraged by these results, we plan to submit to health
authorities globally with the aim of bringing this combination to
people with triple negative breast cancer as soon as possible,"
Roche Chief Medical Officer Sandra Horning said in a statement.
About 12 percent of breast cancers diagnosed in the United States
are triple negative, according to the American Cancer Society.
(Reporting by John Miller; Editing by Himani Sarkar)
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