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Etanercept

Adalimumab

Infliximab

Tumor Necrosis Factor Inhibitors

Anti-Inflammatory Agents, Non-Steroidal

Analgesics, Non-Narcotic

Immunosuppressive Agents

Immunologic Factors

Therapeutic drug monitoring, evaluation of clinical outcomes and laboratory analysis of biomarkers

Infliximab: Adalimumab; Etanercept;

Hiwa K Saaed, PhD

Sana M Mohammed, BSc

Hiwa Saaed, PhD

Rheumatoid arthritis (RA) is an autoimmune, chronic inflammatory disease and TNF-alpha has been recognized as a triggering cytokine in the induction of joints inflammation and is involved in the pathogenesis of RA.

Treatment for RA aims to reduce disease activity, prevent or manage joint deterioration and lower the risk of major comorbidities such as heart disease and stroke.

The strategy of targeting cytokines has significantly increased RA patient outcomes. Therefore management with biological disease-modifying antirheumatic drugs "bDMARD" (Etanercept, Infliximab, Adalimumab) should be considered, If the treatment goal is not met with the first conventional synthetic drug modifying antirheumatic drugs (csDMARD) strategy, or if there are poor prognostic factors.

The multi-biomarker disease activity test could be used to help standardise individual treatment decisions, especially in patients who failed to respond well to the traditional treatment.

Iraq does not currently have specific guidelines, which might pose a risk to patients' safety. More data about the choice of bDMARD is needed in terms of tracking therapeutic response, or whether TNF or other pro-inflammatory cytokines like interleukin-6 (IL-6) is the main factor for the development and severity of RA.

These data are important to improve the overall status of the patient, better choice of treatment and biomarkers to detect.

There is limited information on the treatment patterns of rheumatoid arthritis (RA) across Iraq including the Kurdistan Region. Therefore, the aim of this research is to evaluate the efficacy, and clinical responses of RA patients who have been treated with different anti-TNF, as well as on answering the research hypothesis, Can plasma TNF-alpha and IL-6 be used as markers of therapeutic response to TNF alpha antagonist in patients with RA?

Rheumatologists in Iraq, including those in the Kurdistan Region, rely on the European League Against Rheumatism (EULAR) and the American College of Rheumatology (ACR) guidelines and publications due to a lack of evidence-based national guidelines.

Several studies found that targeting TNF-alpha in the early stages of RA and evaluating serum TNF- levels, in combination with DAS28's assessment of disease clinical activity to track disease progression could result be advantageous for patients on anti-TNF medication in the future.

Objectives: The current research focuses on identifying the efficacy of three TNF-alpha antagonists (Etanercept, Infliximab, and Adalimumab) used currently in Sulaymaniyah Hospitals.

Methodology, an observational open-label study of \~60-80 adult patients with active RA from both genders that are registered at Rehabilitation and Rheumatology Center in Sulaymaniyah City who have been treated with biological agents (Etanercept, Infliximab, Adalimumab), regardless of disease activity and concomitant treatments.

Baseline data will be collected during the first visit and patients will be followed up during the study at regular intervals.

The study includes data of patients after filling the patient consent form, and are willingly giving their demographic data such as; Age, Sex, and Race (ethnic group). and answer the questions of multidimensional health assessment. Also measuring patients' weight at each visit, The clinical assessment of the patients is based on DAS28 (Disease Activity Score) by using ESR(Erythrocyte Sedimentation Rate), and VAS (Visual analogue score).

The laboratory data or the biomarkers at each visit include; CBC (complete blood count), C-reactive protein and ESR as inflammatory biomarkers, and detecting TNF-alpha and IL-6 to indicate the efficacy of the treatment and better choice of the treatment.

As for the statistical analysis plan, the Software SPSS (version 27) will be used.

Demographic and nominal results will be reported in percentages and frequencies.

Numerical results will be reported as the mean and standard deviation in cases of normal distribution, and as the median and interquartile range (IQR) in cases of skewed distribution.

The continuous variables CRP, TNF, IL-6 and the change over time, will be analyzed using linear mixed models for repeated measures. The chi-squared test will be used for dichotomous variables.

Human Blood:

CBC (complete blood count), C-reactive protein and ESR as inflammatory biomarkers, and detecting TNF-alpha and IL-6

Therapeutic Response to Tumor Necrosis Factor-alpha (TNF-alpha) Antagonists in Rheumatoid Arthritis.

Evaluation of the Therapeutic Response to TNF-alpha Antagonist (Etanercept, Infliximab, Adalimumab) in Patients With Rheumatoid Arthritis; Using Plasma TNF-alpha as a Competent Biomarker. Single Center Study in Sulaymaniyah/ Iraq

The data will be presented as a Mean of the sample population.

Tumor Necrosis Factor alpha (TNF-α) is a pro-inflammatory cytokine produced by activating macrophages and T-cells that play a key role in the production of other cytokines and the induction of chronic inflammation.

Interleukin-6 (IL-6) is a major pro-inflammatory cytokine, triggers the vicious circle of escalating RA disease activity via inducing immune activation and inflammation in RA.

C-reactive protein (CRP) a potential marker of systemic inflammation and is elevated in patients with rheumatoid arthritis (RA).

Erythrocyte sedimentation rate (ESR) is a popular hematology test that may detect and track an increase in inflammatory activity in the body, which can be caused by autoimmune illness, infections, or malignancies.

A complete blood count (CBC) is a blood test used to evaluate overall health and detect a wide range of hematological disorders, including anemia.

Disease Activity Score (DAS) is a continuous measure of RA disease activity that combines information from swollen joints, tender joints, acute phase response and general health.

Visual Activity Score (VAS) A psychometric pain rating scale for parameters that range across a continuum of values, such as pain. The VAS pain scale ranges from "no pain" to "worst pain," and patients mark a line to indicate how they are feeling.

To determine how different Tumor Necrosis Factor-alpha (TNF-α) antagonist medications affected plasma (TNF-α) levels and the Disease Activity Score (DAS) in rheumatoid arthritis (RA) patients.

To determine how different Tumor Necrosis Factor-alpha (TNF-α) antagonist medications affected plasma Interleukin-6 (IL-6) levels and the Disease Activity Score (DAS) in rheumatoid arthritis (RA) patients.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Therapeutic Response to Tumor Necrosis Factor-alpha (TNF-alpha) Antagonists in Rheumatoid Arthritis.	NCT05379049	Rheumatoid Arth... Inflammatory Ar... Ankylosing Spon...	Infliximab: Ada...	18 Years -	University of Sulaimani
Therapeutic Response to Tumor Necrosis Factor-alpha (TNF-alpha) Antagonists in Rheumatoid Arthritis.	NCT05379049	Rheumatoid Arth... Inflammatory Ar... Ankylosing Spon...	Infliximab: Ada...	18 Years -	University of Sulaimani

Spots Global Cancer Trial Database for infliximab: adalimumab; etanercept;