Company: PCRX
Filing Date: 2025-05-08
Form Type: 10-Q
Source: 0001396814-25-000061
Chunk: 12

Company: Pacira BioSciences, Inc.
Filing Date: 2025-05-08
Form: 10-Q
Item: Part I, Item 2
Chunk 12
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 pathway and helps to keep inflammation in balance by turning off the IL-1 pathway when it’s not needed. As people get older, their bodies have a more challenging time maintaining that balance resulting in chronic IL1-driven inflammation that eventually causes joint damage and pain. 

After injection of PCRX-201, the HCAd vector enters joint cells and turns them into factories to boost cellular IL-1Ra production, which blocks IL-1 pathway activation to reduce inflammation and pain in the knee. PCRX-201 uses an inflammation-responsive promoter to only produce IL-1Ra when needed, mimicking how the body naturally responds to inflammation. In a Phase 1 proof-of-concept study of patients with moderate to severe OA of the knee, PCRX-201 was well tolerated with improvements in knee pain observed across all doses. The study enrolled 72 patients in two three-dose cohorts: a co-administered IA steroid cohort and a cohort that did not receive a steroid. PCRX-201 was well tolerated, with efficacy observed through at least 52 weeks at all doses and cohorts. The highest level of efficacy was achieved in the co-administered steroid group, which showed a greater percentage of patients with at least a 50% improvement in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain and stiffness scores, as well as a meaningful improvement in Knee Injury and Osteoarthritis Outcomes Score (KOOS) functional assessment. In all 3 doses, over 70% of patients saw a more than 50% improvement in pain compared to baseline at week 16 and 78. PCRX-201 was well-tolerated with no serious treatment-emergent adverse events related to the treatment or procedure reported regardless of steroid pretreatment or dose level administered. While other therapies typically provide relief for three to six months, PCRX-201 has shown the potential to set a new standard with pain relief lasting at least 2 years from a single injection.

Given these highly encouraging Phase 1 data, we are advancing a Phase 2 clinical study in knee OA. The two-part, multicenter study—known as ASCEND—will involve approximately 135 patients, 45 to 80 years old with painful OA of the knee at a Kellgren-Lawrence (K-L) Grade of 2, 3 or 4. Subjects are randomly assigned to a treatment dose group and stratified by K-L Grade, a semiquantitative method for evaluating the severity of OA on