A more than 20-year uneasy biopharma romance between two Swiss giants will be ending as Novartis AG plans to sell its stake in Roche Holding AG back to Roche for about $20.7 billion. Roche described it as a “disentanglement of the two competitors” that will allow it to regain “full strategic flexibility.” Basel, Switzerland-based Novartis currently owns about one-third of Roche, whose shareholders get the final say-so when they vote yea or nay at the company’s Nov. 26 extraordinary general meeting. Novartis was very clear about how it views its stake in Roche, as the company said it “does not consider the financial investment in Roche as part of its core business and therefore not a strategic asset” and that it’s time to “monetize our investment.”

Antengene Corp. Ltd. has formed a partnership with Legochem Biosciences Inc. to jointly develop new antibody-drug conjugates (ADCs) primarily for cancer. The partners will integrate antibodies from Antengene with Legochem’s ADC technology.

Fosun Pharmaceutical Group Co. Ltd. has acquired a 73% stake of Antejin Biotech Co. Ltd. in a merger and acquisition deal worth up to ¥4.006 billion (US$626.2 million) to expand its pipeline in the field of bacterial vaccines. To kick off, Shanghai-based Fosun purchased about 32.52% equity interest in Antejin from nine shareholders for about ¥1.108 billion in cash.

Astrazeneca plc has signed an agreement with liquid biopsy testing company Saga Diagnostics AB to develop dPCR assays. Lund, Sweden-based Saga Diagnostics will develop Sagasafe dPCR assays towards undisclosed methylated targets for analysis of tissue samples and liquid biopsies. The assay is part of Saga’s portfolio of “ultrasensitive technologies,” comprising Sagasign for personalized monitoring of cancer burden and minimal residual disease.

LONDON – Just nine months on from announcing the close of its $6.9 million seed round, Dunad Therapeutics Ltd. has landed a potential $1.3 billion deal with Novartis AG to discover and develop orally available protein degradation drugs. The cash is, of course, backend-loaded, but Dunad is getting a handy $24 million up-front payment and equity investment, and will receive full funding for the research.

PARIS – Defymed SAS reported the formation of the Decapes consortium, which brings together the Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES) and the specialist microtechnology and biomaterials service provider for med-tech companies, Statice. This French consortium is working on a minimally invasive version of Defymed's Mailpan device, which will extend the application range for this artificial pancreas to include other chronic pathologies besides type 1 diabetes.

Merck & Co. Inc. has signed a potential $1 billion research tie-up with Synthekine Inc. to develop engineered cytokines to fight autoimmune diseases, as its $11.5 billion merger with Acceleron Pharma Inc. hit a regulatory speed bump.