Shares of San Diego-based Tocagen Inc. (NASDAQ:TOCA) fell 77.7% to 93 cents Thursday after its two-part immunotherapy for people with recurrent brain cancer failed to surpass standard of care on overall survival (OS), the primary endpoint of the company's phase III Toca 5 trial. Secondary endpoints in the registrational study were also missed, showing no meaningful difference between study arms.

BOSTON – The gut microbiome and its prospects for drug development have been matters of debate for a while, sharpened by the high-profile phase II failure of Seres Therapeutics Inc.'s candidate, SER-109, in the summer of 2016. A panel at Biopharm America surveyed the space in light of developments since the stumble with that candidate, composed of about 50 species of firmicutes spores derived from stool specimens from healthy donors, against recurrent Clostridium difficile infection. 

There have been three oncology drug approvals by the U.S. FDA over the last few years that were based solely on a genetic biomarker, rather than the location in the body where the tumor originated. But to make this tissue-agnostic approach a reality for oncology patients, detecting those genetic biomarkers will have to become increasingly easy and standardized.

The recent progress in interventional cardiology has largely been driven by the aortic valve, although calcification of the aortic root has proven a difficult hurdle to overcome. A newly published study demonstrates that the Tendyne device by Abbott Vascular Inc., of Santa Clara, Calif., can be readily used not just to treat failing mitral valves, but works well in these patients with severe calcification, an achievement that could quickly vault the transcatheter approach past conventional surgical approaches in this population.

Aveo Oncology Inc. is moving closer to a potential NDA filing for its renal cell carcinoma (RCC) drug, tivozanib, following a recently conducted analysis of the ongoing phase III trial Tivo-3. Updated results evidenced "durable improvements" for study participants, all of whom have refractory metastatic RCC, said primary investigator Brian Rini. Company shares (NASDAQ:AVEO) climbed 30.9% to 92 cents Tuesday as Aveo said it would discuss the data with the FDA, which rejected the company's first attempt at approval in RCC in the summer of 2013.

PERTH, Australia – Stem cell therapy has failed to deliver on its promises, according to Exopharm Ltd. founder and CEO Ian Dixon, who said he believes that exosomes, or the extracellular vesicles released by stem cells, could be a disrupter in the regenerative medicine space.

Good news from San Diego-based Acadia Pharmaceuticals Inc.'s phase III trial with Nuplazid (pimavanserin) in dementia-related psychosis (DRP) had analysts trotting out music metaphors in reports about the study called Harmony, while talking already about would-be sales of the drug, a selective serotonin inverse agonist and antagonist that preferentially targets the 5-HT2A receptor.

Shares of New York-based Neurotrope Inc. (NASDAQ:NTRP) fell 77.3% to close at a record low of $1 Monday after a phase II study of its lead candidate, bryostatin-1, failed to outperform a placebo in helping people with moderate to severe Alzheimer's disease (AD) achieve improvement on a standardized measure of cognition.