Mersana Therapeutics Inc. has signed a potential billion-dollar agreement with Johnson & Johnson’s Janssen Biotech Inc. to research and develop antibody-drug conjugates (ADCs) for three cancer targets. Janssen will pay $40 million up front as well as more than $1 billion in potential milestone payments in a big day for ADCs, which saw Mersana’s other development partner, Synaffix BV, announce a tie-up with Macrogenics, Inc. in a deal worth up to $586 million.

Gilead Sciences Inc. is making a one-time $1.25 billion payment, with a commitment for a royalty that analysts predict could add as much $1.5 billion more, to Viiv Healthcare Ltd., in a deal designed to resolve all global pending or potential patent infringement claims relating to sales of HIV drug Biktarvy (bictegravir/emtricitabine/tenofovir alafenamide). The initial payment, recorded in the fourth quarter of 2021, put a significant dent in Gilead’s earnings per share but removes the uncertainty of a trial outcome and clears the way for future bictegravir-containing products.

Glooko Inc. acquired Xbird GmbH to further build out its diabetes management platform by adding Xbird’s just-in-time artificial intelligence (JITAI) system to provide adaptive interventions that can enable better informed decision making in the moment. The company declined to provide details of the transaction.

Samsung Biologics Co. Ltd. has agreed to buy out Biogen Inc.’s stake in the joint venture Samsung Bioepis Co. Ltd. for $2.3 billion. Biogen will receive $1 billion in cash at closing and $1.25 billion in deferred payments of $812.5 million due at the first anniversary and $437.5 million due at the second anniversary of the closing of the transaction. Biogen is also expected to receive up to $50 million upon achievement of certain commercial milestones.

Stockholm-based Alex Therapeutics AB is joining forces with pharmaceutical company Pfizer Inc. to roll out digital therapies to patients in Germany. The partnership will utilize Alex Therapeutics' Alex DTx platform for nicotine addiction in Germany. The platform combines cognitive behavioral therapy (CBT) and acceptance and commitment therapy with artificial intelligence (AI) to create treatments for a wide range of psychiatric and somatic disorders.

Samsung Biologics Co. Ltd. has agreed to buy out Biogen Inc.’s stake in the joint venture Samsung Bioepis Co. Ltd. for $2.3 billion. Biogen will receive $1 billion in cash at closing and $1.25 billion in deferred payments of $812.5 million due at the first anniversary and $437.5 million due at the second anniversary of the closing of the transaction. Biogen is also expected to receive up to $50 million upon achievement of certain commercial milestones.

Several pharma companies think that targeting a rogue protein known as alpha-synuclein could be the key to halting or reversing neurodegeneration in Parkinson’s disease – but has the industry learned from a string of failures in Alzheimer’s? In the space of a few weeks, Novartis AG and Sanofi AS have signed major deals for molecules targeting misfolded alpha-synuclein, the rogue protein thought to be the root cause of Parkinson’s disease.

Nextkidney BV has signed a deal to buy Dialyss Pte. Ltd. as it gears up to commercialize its home hemodialysis device Neokidney. The Singapore-based startup specializes in sorbent technologies for the regeneration of dialysate and has been a collaborator of Nextkidney’s for six years. The combined team will prepare for a clinical trial in Singapore, followed by a European multicenter trial and CE mark submission in 2023. Financial terms of the deal were not disclosed.

Akili Interactive Inc. is the latest in a growing field of med-tech startups that are merging with special purpose acquisition companies as a backdoor path to an initial public offering. On Wednesday, the digital medicine company reported plans to combine with Social Capital Suvretta Holdings Corp. I in a deal valued at approximately $1 billion.