The Effect of Phenolic Compounds in Osteoarthritis; a Nutritional Intervention

Study Overview
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Brief Summary
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The main objective of the study is to elucidate the beneficial effect of a dietary supplement with phenolic compounds in patients with OA versus ascorbic acid. The analysis of the data is expected to clarify the role of the new supplement as one with a positive effect on OA-related biomarkers, on functional abilities and on the quality of life of patients with OA.

Official Title
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The Effect of Phenolic Cmpounds in Osteoarthritis; a Nutritional Intervention

Conditions
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Symptomatic Knee Osteoarthritis

Intervention / Treatment
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* Dietary Supplement: Ascorbic acid / phytochemical supplement
* Dietary Supplement: Ascorbic acid


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: symptomatic knee OA (patients with at least moderate symptoms) patients should be able to walk without a medical or other support device (such as a walking stick, crutches, or a kneecap). Exclusion Criteria: Patients undergoing physical therapy or TENS, have rheumatoid arthritis, fibromyalgia, spinal disorders or any other disorders that according to the physician is a bias, stiffness> 30 minutes, have scheduled knee surgery or any other programmed surgery during the trial, show WOMAC pain scale <4 for pain overall, those with a diagnosis of kidney or liver disease, coagulation disorders, any form of cancer, HIV infection, type I diabetes, those with unregulated type II diabetes, those using illicit substances or having a history of substance or alcohol abuse over the past 2 years (or those who consume more than 2 typical alcoholic beverages / day in the present), those using corticosteroids within 2 months prior to randomization and during the trial, those who change their diet or supplementation 1 month or during the recruitment/trial, those using ascorbic acid supplement or any phytochemical-rich supplement, women on estrogen replacement therapy, during pregnancy or lactation and those judged by the researcher as unable to perceive and comply with the obligations laid down in the Protocol and for which consent and voluntary participation is sought.

Ages Eligible for Study
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Minimum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: A randomized double-blind clinical intervention with two parallel groups lasting 3 months is proposed to elucidate the beneficial effect of a novel food supplement on OA. Participants will undergo clinical and biochemical testing and will provide a complete medical history and history of the disease. Demographics, smoking, alcohol consumption, eating habits and physical activity, pain, and functional inability to enroll in the study will also be recorded.
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: ascorbic acid / phytochemical supplement<br>A mixture of active phenolic compounds with ascorbic acid | Dietary Supplement: Ascorbic acid / phytochemical supplement<br>* Ascorbic acid / phytochemical supplement<br>|
| Experimental: ascorbic acid<br>Ascorbic acid group | Dietary Supplement: Ascorbic acid<br>* Ascorbic acid<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| WOMAC™ Osteoarthritis Index Pain Subscale | It is a self-administered questionnaire consisting of 24 items divided into 3 subscales: Pain (5 items): during walking, using stairs, in bed, sitting or lying, and standing upright Stiffness (2 items): after first waking and later in the day Physical Function (17 items): using stairs, rising from sitting, standing, bending, walking, getting in / out of a car, shopping, putting on / taking off socks, rising from bed, lying in bed, getting in / out of bath, sitting, getting on / off toilet, heavy domestic duties, light domestic duties The test questions are scored on a scale of 0-4, which correspond to: None (0), Mild (1), Moderate (2), Severe (3), and Extreme (4). The scores for each subscale are summed up, with a possible score range of 0-20 for Pain, 0-8 for Stiffness, and 0-68 for Physical Function. Higher scores on the WOMAC indicate worse pain, stiffness, and functional limitations. | 3 months | 
| Visual Analogue Scale - VAS | The Visual Analogue Scale - VAS is a unidimensional measure of pain intensity. It is a measurement instrument that tries to measure a characteristic or attitude that is believed to range across a continuum of values and cannot easily be directly measured. | 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| WOMAC™ Osteoarthritis Index Stiffness Score | It is a self-administered questionnaire consisting of 24 items divided into 3 subscales: Pain (5 items): during walking, using stairs, in bed, sitting or lying, and standing upright Stiffness (2 items): after first waking and later in the day Physical Function (17 items): using stairs, rising from sitting, standing, bending, walking, getting in / out of a car, shopping, putting on / taking off socks, rising from bed, lying in bed, getting in / out of bath, sitting, getting on / off toilet, heavy domestic duties, light domestic duties | 3 months | 
| WOMAC™ Osteoarthritis Index Physical Function Score | It is a self-administered questionnaire consisting of 24 items divided into 3 subscales: Pain (5 items): during walking, using stairs, in bed, sitting or lying, and standing upright Stiffness (2 items): after first waking and later in the day Physical Function (17 items): using stairs, rising from sitting, standing, bending, walking, getting in / out of a car, shopping, putting on / taking off socks, rising from bed, lying in bed, getting in / out of bath, sitting, getting on / off toilet, heavy domestic duties, light domestic duties | 3 months | 
| Questionnaire SF-36 | SF-36 is a self-reporting set of generic, coherent, and easily administered quality-of-life measures. | 3 months | 
| Circulating Inflammatory markers | IL-1beta, IL-6, IL-13, TNF-alpha, endothelin | 3 months | 
| Circulating oxidative damage markers | MPO, oxLDL, serum oxidisability | 3 months | 
| Circulating miRNAs | miR-146a-5p, miR-21-5p, miR-126-3p, miR-155-5p | 3 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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symptomatic knee osteoartritis, phenolic compound,