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The Phosphodiesterase 3 Inhibitor Cilostazol as an Adjunct to Conventional Therapy in Patients With Osteoarthritis

The Phosphodiesterase 3 Inhibitor Cilostazol as an Adjunct to Conventional Therapy in Patients With Osteoarthritis: A Proof-of-Concept, Randomized, Double-Blind, Placebo-Controlled Trial

Status
Withdrawn
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04789837
Enrollment
0
Registered
2021-03-10
Start date
2021-03-01
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

Osteoarthritis

Brief summary

Cilostazol is able to suppress the degradation of type II collagen in human chondrocytes induced by IL-1b. Cilostazol add-on for celecoxib therapy has synergistic anti-arthritic potential by inhibiting proinflammatory cytokine production in synovial fibroblasts through the IL-10/SOCS3 pathways, consequently leading to the inhibition of synovial cell proliferation and overcoming the perpetuation of synovial inflammation.

Interventions

Cilostazol 50 mg twice daily plus Celecoxib 200mg capsule

DRUGPlacebo

Placebo tablet twice daily plus Celecoxib 200mg capsule

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
30 Years to 60 Years
Healthy volunteers
No

Inclusion criteria

* Primary osteoarthritis Patients recruited were between 30 to 60 years of age, with X-ray confirmed Kellgren-Lawrence grade13 II or III severity primary tibiofemoral OA, according to the American College of Rheumatology criteria.

Exclusion criteria

* Those patients were excluded from the present study who: * were of age less than 30 years or more than 60 years * presented with active concomitant gastroduodenal disorders, hepatic and renal impairment within last 30 days prior to receiving the study drug * were diagnosed to have any inflammatory arthritis, gout or acute trauma of the knee, hip or spine; accompanying OA of the hip of sufficient severity to interfere with the functional assessment of the knee * had previous or ongoing treatment with oral SYSDOA (e.g., glucosamine sulphate, chondroitin sulphate, diacerein, piascledine), anti-depressants, tranquillisers, antacids or antibiotics; were having active cardiac lesion or hypertension, were pregnant females and those who were planning their pregnancy during the study * were having a known hypersensitivity to the used medications * have persistent diarrhoea or laxative use; severe gastrointestinal disorders, severe obesity, severe parenchymal organ disease, or anaemia (haemoglobin\< 10.0 g/ dl or haematocrit \< 30%). * Patients who received oral, intramuscular, intraarticular or soft tissue injections of corticosteroids within last eight weeks before receiving the first dose of the study medication, or had undergone joint lavage and arthroscopic procedures in the previous 6 months, were also excluded.

Design outcomes

Primary

MeasureTime frameDescription
Visual Analogue scale assessment of painweek 12the change of Visual Analogue Scale (VAS) pain score from baseline to posttreatment. Scores are recorded by making a handwritten mark on a 10-cm line that represents a continuum between no pain and worst pain.

Secondary

MeasureTime frameDescription
the change of Short Form 36 Questionnaire (SF-36) score from baseline to posttreatmentweek 12The SF-36 is a generic instrument to assess health-related quality of life. It consists of 36 questions and assesses 8 dimensions: physical functioning, role physical, pain index, general health, vitality, social functioning, role emotional, and mental health index. It also provides 2 summary measures of physical and mental components. The SF-36 score ranges from 0 to 100, with higher scores indicating better health status.
Adverse drug reaction12 weeksClinical side effects
Interleukin 1 beta12 weeksInterleukin 1 beta serum level
WOMAC changeweek 12the change of WOMAC Osteoarthritis Index from baseline to posttreatment
Serum levels of IL-1712 weeksSerum levels of IL-17
Serum levels of BDNF12 weeksSerum levels of BDNF
Serum levels of IL-1012 WEEKSSerum levels of IL-10
Serum level Tumor necrosis factor- alpha (TNF-α)12 weeksSerum level Tumor necrosis factor- alpha (TNF-α)

Countries

Egypt

Outcome results

None listed

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