Four years after exiting the weight-loss market and selling its obesity drug Belviq to Eisai Arena looks to have rebuilt itself around a pipeline of disparate assets. Yesterday the reboot was set back when the company’s CB2 agonist olorinab failed a phase II trial in abdominal pain due to irritable bowel syndrome. Arena had previously suggested that a 1.5-point placebo-adjusted improvement in pain score in the Captivate study would count as a success; yesterday it gave no data from Captivate, but said there was no statistically significant improvement versus placebo. Abdominal pain is a hallmark of IBS, and there had been hope for the readout given olorinab’s earlier success in a small study in pain associated with Crohn’s disease. Though Arena cited a benefit in a subgroup of Captivate patients with moderate to severe pain at baseline, it accepted that olorinab was now under review for “possible strategic options”, which usually suggests discontinuation. The bad news is that Arena’s lead project, etrasimod, failed in atopic dermatitis last year, and olorinab was supposed to have filled a gap in major catalysts until next year’s phase III etrasimod readout in ulcerative colitis.
Selected Arena pipeline assets | ||||
---|---|---|---|---|
Project | Mechanism | 2026e sales ($m) | Use | Detail |
Etrasimod | S1P receptor 1 regulator | 950 | Atopic dermatitis | Failed ph2 Advise trial |
Crohn's disease | Ph2 Cultivate trial reads out H2 2021 | |||
Ulcerative colitis | Ph3 Elevate trial reads out Q1 2022 | |||
Olorinab | CB2 agonist | 76 | IBD-associated pain | Failed ph2 Captivate trial |
Ralinepag | Prostacyclin receptor agonist | 50 | Pulmonary hypertension | Licensed to United Therapeutics for $800m up front |
APD418 | Beta 3 adrenoceptor antagonist | – | Heart failure | Said to be in ph1 (no CT.gov entry) |
LP352 | 5-HT2C superagonist | – | Epileptic encephalopathies | Spun out into Longboard Phamacueticals |
Source: Arena & EvaluatePharma sellside consensus. https://www.evaluate.com/vantage/articles/news/snippets/second-bump-road-arenas-reboot |