The possibilities of cures for cancer and other tough-to-treat diseases and the ability to further personalize medicine are creating a lot of excitement about the future of radiopharmaceuticals as both therapy and diagnostics. To reach that future, industry and researchers will have to overcome a lot of challenges, not the least of which stem from the multiple government agencies involved in regulating the source material, development, distribution and use of radioactive drugs and devices.
The radiopharma field has garnered increasing attention in recent years due to big-ticket deals like Bayer AG's $2.9 billion acquisition of Algeta ASA and Novartis AG's nearly $6 billion spent on buying Advanced Accelerator Applications SA and Endocyte Inc. As a result, competition is ratcheting up and pipelines are exploding with new combinations of different drugs. The global radiopharmaceuticals market was estimated to be valued at $6.7 billion in 2020, a number expected to reach $11.5 billion by 2027, according to a 2022 William Blair report.
Adcendo ApS has added a further €31 million (US$33.6 million) to its series A round, providing the means to take its lead antibody-drug conjugate (ADC) through to clinical proof of concept in the treatment of sarcoma.
A few weeks after Gossamer Bio Inc. said it was pausing enrollment in a phase Ib/II study of CNS-penetrant BTK inhibitor GB-5121 in relapsed/refractory CNS lymphoma, citing the drug’s risk/benefit profile observed to date and a prioritization of resources, the company is dropping the drug’s development entirely.
As Seagen Inc. preps for a merger, the U.S. FDA awarded accelerated approval to the company’s big-selling Padcev (enfortumab vedotin). The approval is for a combination therapy with Merck & Co. Inc.’s Keytruda (pembrolizumab) as a first-line treatment for adults with locally advanced or metastatic urothelial cancer who are not eligible for cisplatin-containing chemotherapy.
If its challenges can be overcome, radioligand therapy is poised to change the way many cancers are treated. It is also likely to become an example of how scientific advances, once they are translated successfully, can enable further insights in a bench-to-bedside-to-bench loop. David Piwnica-Worms, professor and chair of cancer systems imaging at The University of Texas MD Anderson Cancer Center, predicted that as radioligand therapy expands, many questions will be answered about both radiation biology and the interaction of radiation with the immune system more specifically.
After spending decades developing targeted chemotherapy and bringing a dozen or so compounds into the clinic, Fusion Pharmaceuticals Inc. Chief Scientific Officer Christopher Leamon switched careers to focus on radio-oncology because he saw the need for “a really strong bomb to target cancer to get it to respond.” That was radiotherapy, said Leamon, who was one of the scientific founders of Endocyte Inc., which Novartis AG acquired.
Scorpion Therapeutics Inc. has out-licensed two of its small-molecule EGFR inhibitors to Pierre Fabre SA in exchange for a $65 million up-front fee and could also earn up to $553 million in potential milestone payments, plus royalties on net sales.
Global interest in radiopharmaceuticals is growing, and some big deals in the space have sparked interest in the last few years. Novartis AG has spent about $6 billion in acquisitions and is seen as the global leader.
The role of G protein-coupled receptor 35 (GPR35) in gastrointestinal (GI) diseases has been genetically validated for some time, with several pharmaceutical companies advancing programs designed to tackle the target; however, most of these efforts to date have focused on increasing GPR35 activity. ThirtyFiveBio’s approach is different: The newly founded virtual biotech company believes that antagonizing the target and thereby blocking unwanted GPR35 signaling may be a more appropriate way to address GI conditions, including digestive tract cancers.
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