Mersana Therapeutics Inc. is getting $100 million up front in an option deal with GSK plc for preclinical-stage antibody-drug conjugate (ADC) XMT-2056, which could bring up to $1.36 billion more in an option exercise payment, development, regulatory and commercial milestones. It’s the second potential $1 billion-plus ADC deal for Cambridge, Mass.-based Mersana in 2022 and the first for its Immunosynthen platform, which uses a STING agonist payload specifically designed for ADCs.

Now that the U.S. Department of Health and Human Services (HHS) has declared monkeypox a public health emergency, nearly two weeks after a similar declaration from the World Health Organization, the way is cleared for a coordinated response and emergency use authorizations to address supply challenges that could limit the availability of currently approved vaccines. It also has several companies ready to leap into the fray if their preclinical studies show a path to approval. HHS said it just shipped more than 602,000 doses of the Jynneos vaccine to states and jurisdictions, an increase of 266,000 in the past week.

As fellow gene editing firm Crispr Therapeutics AG hosted an innovation day in which it confirmed plans for regulatory filings by year-end for an ex vivo gene editing therapy in sickle cell disease and beta-thalassemia, Precision Biosciences Inc. announced plans to develop an in vivo gene editing approach through a collaboration with Novartis AG that brings Precision an initial $75 million with up to $1.4 billion in potential milestones.

Analysts have already started tagging Cogent Biosciences Inc.’s bezuclastinib as potentially best in class, after the company presented impressive, though early stage, data at the European Hematology Association Congress in Vienna demonstrating promising efficacy and a possibly differentiating safety profile for the selective KIT D816V inhibitor in advanced systemic mastocytosis.

When he first stepped into the field of glycoproteomics, particularly the potential of truncated O-glycans as cancer targets, Constantine Theodoropulos, CEO of Go Therapeutics Inc., said the reaction from peers was less than encouraging. 

When he first stepped into the field of glycoproteomics, particularly the potential of truncated O-glycans as cancer targets, Constantine Theodoropulos, CEO of Go Therapeutics Inc., said the reaction from peers was less than encouraging. “They said, ‘You’re nuts, it’s too complicated.’” Now, however, the company he co-founded has landed a deal with Astellas Pharma Inc.’s immuno-oncology-focused subsidiary, Xyphos Biosciences Inc., that brings $20.5 million up front, with the potential for up to $763 million in milestone and contingency payments down the road.

The U.S. FDA has rejected Verrica Pharmaceuticals Inc.’s drug-device combination to treat the viral skin disease molluscum for a third time, losing more ground to a potential rival from Novan Inc., because of continued manufacturing issues. There are no FDA-approved treatments for molluscum contagiosum, which leads to skin-colored or pink lesions and affects around 6 million people in the U.S. annually.

Dermavant Sciences Inc. has received its first FDA approval with the agency’s blessing of Vtama (tapinarof) for treating plaque psoriasis in adults. The treatment is also the first FDA-approved, steroid-free topical medication in its class in addition to being the first psoriasis novel topical chemical entity introduced to the market in the past 25 years.