FX201 for Osteoarthritis

Not currently recruiting at 7 trial locations
CL
BF
PD
Overseen ByPatricia D'Alessio
No Placebo GroupAll trial participants will receive the active study treatment (no placebo)

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial tests a new treatment called FX201 for individuals with painful knee osteoarthritis (OA). Researchers aim to determine if a single injection of FX201 can reduce pain and improve knee function. The trial will evaluate different doses to identify the most effective and safe option. Individuals with moderate knee pain from OA, who have tried at least two other treatments without success, might be suitable candidates. As a Phase 1 trial, participants will be among the first to receive this treatment, aiding researchers in understanding its effects in people.

Will I have to stop taking my current medications?

The trial does not specify if you need to stop taking your current medications, but it does exclude those who have used certain treatments like intra-articular (IA) drugs or biologics within 6 months before screening. It's best to discuss your specific medications with the trial team.

Is there any evidence suggesting that FX201 is likely to be safe for humans?

Research has shown that FX201, a new gene therapy for osteoarthritis, was well tolerated in past studies. In earlier trials, patients experienced only minor side effects. Reports indicate that FX201 was tolerated for over a year, even at different doses. While some mild side effects appeared, they did not pose a major concern. Animal studies also demonstrated its safety. The ongoing research remains in the early stages, so researchers are closely monitoring safety. However, the results are promising for those considering joining this trial.12345

Why do researchers think this study treatment might be promising?

Researchers are excited about FX201 for osteoarthritis because it offers a potentially transformative approach compared to traditional treatments like NSAIDs, corticosteroids, and physical therapy. Unlike these standard options, which mainly address symptoms, FX201 is designed to deliver a single injection that could provide long-lasting relief. FX201 works uniquely by using gene therapy to produce an anti-inflammatory protein directly in the joint, targeting the root cause of pain and inflammation. This innovative mechanism could lead to more sustained improvements with fewer doses, making it a promising option for those suffering from osteoarthritis.

What evidence suggests that FX201 might be an effective treatment for osteoarthritis?

Research shows that FX201, a gene therapy injected directly into the joint, may help reduce pain in people with osteoarthritis (OA). Studies have found that patients treated with FX201 experienced significant pain relief and improved joint function, with benefits lasting at least 52 weeks. Most patients tolerated the treatment well, with no serious side effects. Additionally, animal studies suggest FX201 can reduce joint damage caused by OA. These findings support the potential of FX201 in treating knee osteoarthritis.14567

Who Is on the Research Team?

CB

Cecilia Barese, MD

Principal Investigator

Pacira Pharmaceuticals, Inc

Are You a Good Fit for This Trial?

This trial is for men and women aged 30-80 with painful knee osteoarthritis (K-L Grade 2, 3 or 4), a BMI ≤40 kg/m², who have tried at least two conservative therapies or one therapy plus an injection treatment without success. Participants must be willing to use effective contraception.

Inclusion Criteria

Written consent to participate in the study
I have tried at least two treatments for my knee arthritis without success.
I experience moderate pain in one of my joints.
See 4 more

Exclusion Criteria

I expect to have major surgery during the study.
My heart's electrical activity is unusual and considered significant by a doctor.
You have used any experimental medication, biologic, or medical device within the past 3 months.
See 12 more

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Single Ascending Dose (SAD) Phase

Up to three ascending doses of FX201 will be tested in cohorts of 5-8 patients. Each patient will only receive one injection of FX201.

4 weeks per cohort
1 visit (in-person) per cohort

Expansion Phase

Up to an additional 35 patients will be enrolled at each dose level reviewed by the DMC. Each patient will only receive one injection of FX201.

Varies based on cohort expansion

Follow-up

Participants are monitored for safety and effectiveness after treatment

104 weeks
Multiple visits over 104 weeks

What Are the Treatments Tested in This Trial?

Interventions

  • FX201

Trial Overview

The study tests FX201, a new drug given as a single injection in the knee. The first part involves escalating doses in small groups monitored for safety. The second part expands patient numbers at each dose level after safety review.

How Is the Trial Designed?

3

Treatment groups

Experimental Treatment

Group I: Mid Dose FX201Experimental Treatment1 Intervention
Group II: Low Dose FX201Experimental Treatment1 Intervention
Group III: High Dose FX201Experimental Treatment1 Intervention

Find a Clinic Near You

Who Is Running the Clinical Trial?

Flexion Therapeutics, Inc.

Lead Sponsor

Trials
20
Recruited
2,100+

Pacira Pharmaceuticals, Inc

Lead Sponsor

Trials
142
Recruited
14,300+
Headquarters
Tampa, USA
Known For
Non-opioid Pain Management
Top Products
Exparel, Zilretta, iovera
Dr. Jonathan Slonin profile image

Dr. Jonathan Slonin

Pacira Pharmaceuticals, Inc

Chief Medical Officer since 2020

BSc in Biomedical Engineering and MD from University of Miami, MBA from George Washington University

Frank D. Lee

Pacira Pharmaceuticals, Inc

Chief Executive Officer since 2024

BSc in Chemical Engineering from Vanderbilt University, MBA from Wharton Graduate School of Business

Citations

Intraarticular Gene Therapy Well-Tolerated, Improves Pain ...

Updated data from a phase 1 study of PCXR201, formerly known as Flexion's FX201, were presented at the 2023 ASCGT Annual Meeting.

Efficacy and Safety of FX201, a Novel Intra-Articular IL-1Ra ...

Consistent with equine and murine data, efficacy data suggest that HDAd-ratIL-1Ra decreased OA-induced joint damage in ACLT-operated rats, even at a 10-fold ...

Pacira BioSciences Announces PCRX-201 Granted ...

PCRX-201 was well tolerated, with efficacy observed through at least 52 weeks at all doses and cohorts. ... Preliminary 36-week data were ...

Intra-Articular FX201 Gene Therapy Shows Promise for ...

The therapy was generally well-tolerated and offered substantial pain relief in patients.

Žs FX201, for theTreatment of Osteoarthritis

We will test the ability for FX201 to reduce inflammatory output and fibrotic output in patient synoviocytes and improve survival of patient chondrocytes. This ...

Study to Evaluate the Safety and Tolerability of FX201 in ...

This two-part study will be conducted in male and female patients, 30 - 80 years of age with painful OA of the index knee with ...

Trial | NCT04119687

Official Title. An Open-Label, Single Ascending Dose Study to Assess the Safety and Tolerability of FX201 in Patients with Osteoarthritis of the Knee · Snapshot.

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