ONO PHARMA USA announced that its candidate, tirabrutinib (ONO-4059), a Bruton's tyrosine kinase inhibitor, was granted Orphan Drug Designation on March 21, 2023 by the FDA for the treatment of patients with primary central nervous system lymphoma (PCNSL).
The FDA's Orphan Drug Designation program supports the development and evaluation of investigational drugs and biologics that show promise for the diagnosis, treatment, or prevention of rare diseases or disorders, affecting fewer than 200,000 people in the United States (U.S.).
PCNSL is a rare and aggressive extra nodal non-Hodgkin lymphoma affecting the brain, its protective membranes, the spinal cord, and/or eye, without systemic involvement at the time of diagnosis. In the U.S., the incidence of PCNSL is approximately five out of 1,000,000 people per year, with higher rates in people over 65 years old.1 Symptoms can vary depending on the location of the tumor and may include headache, nausea, vomiting, visual symptoms, and seizures, among others. ONO is currently recruiting newly diagnosed and relapsed or refractory adult PCNSL patients in the U.S. for the PROSPECT clinical study (www.theprospectstudy.com; NCT04947319).
"We are extremely pleased that tirabrutinib has been granted orphan drug status for the treatment of PCNSL," said Kunihiko Ito, President and CEO of ONO PHARMA USA. "The designation represents a milestone for ONO. Currently, ONO is carrying out a Phase 2 trial of tirabrutinib in people with newly diagnosed or relapsed/refractory PCNSL, and we look forward to advancing clinical trials so that patients may have therapeutic options as soon as possible."
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