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Otsuka and Ionis enter into licensing agreement covering Europe for hereditary angioedema

Otsuka Pharmaceutical Europe Ltd. (Otsuka) has announced that its parent company Otsuka Pharmaceutical Co., Ltd. and Ionis Pharmaceuticals, Inc. (Ionis), a leader in RNA-targeted therapy based in California, have entered into a licence agreement for Otsuka to acquire exclusive marketing rights to the Ionis hereditary angioedema (HAE) drug candidate, donidalorsen (generic name), in Europe.

Donidalorsen is an investigational ligand-conjugated antisense (LICA) medicine designed to target the prekallikrein, or PKK, pathway. PKK plays an important role in activating inflammatory mediators associated with acute attacks of hereditary angioedema. The Phase 2, open-label, extension study demonstrated donidalorsen reduced HAE attack rate by a mean of 96%, from 2.70 attacks per month to 0.06 attacks per month over 2 years with treatment being well tolerated. Ionis is currently conducting two Phase 3 multicentre studies; a double-blind, placebo-controlled study in North America and Europe and an open-label, global study. Donidalorsen has received Orphan Drug Designation in the US in 2023.

Makoto Inoue, president and representative director of Otsuka Pharmaceutical Co., Ltd. said: “Otsuka is committed to the development of drugs for rare diseases such as autosomal dominant polycystic kidney disease (ADPKD). Through this collaboration with Ionis, if regulatory approval is received, we look forward to bringing donidalorsen to patients in Europe to address the unmet medical needs of patients with HAE.”

Under the terms of the agreement, Otsuka will pay Ionis an upfront payment of $65 million, plus payments based on achievement of regulatory and sales milestones. Otsuka will apply for regulatory approval and exclusively commercialise the product in Europe.

“We are excited to collaborate with Otsuka given their proven results in bringing rare disease medicines to patients in Europe,” said Brett P. Monia, Ph.D., Ionis chief executive officer. “This agreement is aligned with our strategy to initially focus our commercialisation efforts on the US market. We are encouraged by the product profile of donidalorsen to date and look forward to reporting pivotal topline Phase 3 results in HAE in the first half of next year.”

 

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