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The GRK2 Inhibitor Paroxetine as a Novel Adjunct to Conventional Therapy in Rheumatoid Arthritis Patients

The GRK2 Inhibitor Paroxetine as a Novel Adjunct to Conventional Therapy in Rheumatoid Arthritis Patients. A Proof-of-Concept, Randomized, Double-Blind, Placebo-Controlled Trial.

Status
Withdrawn
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04757571
Enrollment
0
Registered
2021-02-17
Start date
2021-02-01
Completion date
2024-12-31
Last updated
2025-07-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Rheumatoid Arthritis

Brief summary

Among three MAPK families, paroxetine was found to be able to decrease the phosphorylation of ERK. It was reported that paroxetine attenuates the symptoms of collage induced arthritis rats due to its inhibitory effect on T cell activation and infiltration to synovial tissue via suppression of ERK pathway. This study aimed to evaluate the therapeutic efficacy of paroxetine in rheumatoid arthritis. Paroxetine prevents the joint inflammation which is at the very early stage. paroxetine could inhibit GRK2 with selectivity over other GRKs. Medications developed for maintaining the immunologic equilibrium. such as GRK2 inhibitors, will be the novel trends in RA treatment that could avoid the adverse side effects that are common with current treatment options.

Interventions

DRUGParoxetine

Paroxetine 20 mg tablet plus standard therapy

DRUGPlacebo

Placebo tablet plus standard therapy

Sponsors

Sadat City University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
No

Inclusion criteria

• Patients with active rheumatoid arthritis based on DAS28 score. Patients received the standard therapy (i.e. one or more conventional DMARDs) for at least three months.

Exclusion criteria

* Known hypersensitivity to metformin. * Patients who have a prior diagnosis with diabetes mellitus. * Patients receive metformin for any other indications. * Patients with congestive heart failure. * Patients with a history of myocardial infarction. * Patients with severe anemia. * Patients with active infections or other inflammatory diseases. * Patients receiving biological therapy. * Pregnancy or lactation. * Patients with impaired liver functions. * Patients with impaired kidney functions (serum creatinine concentrations ≥1.5 and ≥1.4 mg/dL in males and females respectively). * Patients with malignancies.

Design outcomes

Primary

MeasureTime frameDescription
ACR 20% improvement criteria (ACR20) response rateweek 12based on tender and swollen joint counts, patient's assessment of pain, patient and physician global assessment of arthritis, Health Assessment Questionnaire Disability Index (HAQ DI), and CRP level
ACR50 & ACR70 response rateweek 12based on tender and swollen joint counts, patient's assessment of pain, patient and physician global assessment of arthritis, Health Assessment Questionnaire Disability Index (HAQ DI), and CRP level
Disease activity scale in 28 joints (DAS-28)week 12Scale assessing severity of rheumatoid arthritis based on number of tender, swollen joints, erythrocyte sedimentation rate (ESR) levels, and patient self-assessment of his condition (global health assessment). Whereas 28 describes the number of different joints including in the measurement: proximal interphalangeal joints (10 joints), metacarpophalangeal joints (10), wrists (2), elbows (2), shoulders (2), knees (2).

Secondary

MeasureTime frameDescription
CRP12 weeksSerum level of C-reactive protein (CRP)
GRK2 expressionweek 12GRK2 expression in serum
Drug Adverse effects12 weeksAdverse effect incidence: adverse effect will be reported by patients or their caregivers and recorded by investigator.
TNF-αweek 12Serum level Tumor necrosis factor- alpha (TNF-α)
Inteleukins12 weeksSerum levels of Interleukins (IL) IL-17, IL-1β , IL-6 & IL-10

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026