Trying to shake up the Parkinson's paradigm, AbbVie submits NDA for continuous, 24-hour infusion therapy
AbbVie is approaching the FDA with a new therapy to potentially treat Parkinson’s disease, using prodrugs of two medications commonly used for the condition.
The Big Pharma submitted its NDA for ABBV-951, a solution of levodopa and carbidopa prodrugs being evaluated in advanced Parkinson’s patients who don’t respond well to oral therapy, AbbVie announced Friday morning. Researchers are hoping a positive Phase III study that reads out in late October will help move things along quickly at the agency.
AbbVie’s theory here revolves around the use of a continuous, 24-hour infusion of its therapy as a unique and effective way to treat advanced Parkinson’s disease. The levodopa and carbidopa prodrugs are delivered in small doses subcutaneously through a pump, and they’re designed to activate once they enter the bloodstream.
Much of AbbVie’s research thus far has centered around finding the right concentration to be able to deliver the lower levodopa and carbidopa doses while still inducing efficacious responses. Oral levodopa in particular is one of the most commonly prescribed Parkinson’s drugs, but its effect wanes quickly and can fail to control motor symptoms if the narrow therapeutic window is missed.
In its pivotal Phase III study, AbbVie asked patients to self-report the times when they felt their symptoms were well-controlled and when they weren’t in a specialized diary. The company described these as “On” and “Off” times, respectively. AbbVie’s primary endpoint aimed to measure the change in baseline “On” time in hours without involuntary movements after 12 weeks.
After that time, the average increase was 2.72 hours of “On” time for patients taking ABBV-951 and 0.97 among those on standard of care. Additionally, decreases of “Off” time came in at 2.75 hours in the treatment arm and 0.96 hours in the standard of care group.
Both differences were statistically significant, clocking in at respective p-values of p= 0.0083 and p=0.0054.
AbbVie has yet to provide a full breakdown of data at a medical conference, but the company noted the adverse event profile came in largely mild-to-moderate. Most side effects had to do with the infusion site, including pain, reddening of the skin, inflammation and bruising. Though most were non-severe, a much higher rate of patients in the treatment arm (21.6%) discontinued in the study than those taking standard of care (1.5%).
The company is hoping this Parkinson’s program turns out better than one of its previously partnered candidates. Last month, AbbVie dropped its collaboration with Sweden’s BioArctic around a portfolio of alpha-synuclein antibodies, including one previously expected to be ready for Phase II.
Should AbbVie net approval here, they’d beat a couple Big Pharma competitors to the punch. Roche and Prothena are still in Phase III on a program partnered for $600 million, while Novartis inked a $1.5 billion pact to get its hands on two UCB assets — one small molecule inhibitor and one antibody.