Isthmin-1 as a Biomarker of Disease Activity in Rheumatoid Arthritis: Correlation With Musculoskeletal Ultrasound Findings

January 25, 2026 updated by: Amera Imam Abdel - Ghany Ahmed

Serum Isthmin-1 Level as a Biomarker of Disease Activity in Rheumatoid Arthritis: Correlation With Musculoskeletal Ultrasound Findings

The goal of this case control study is to detect serum isthmin-1 level in RA patient compered to healthy control . The main questions it aims to answer are:

what is the serum isthmin-1 level in RA patient? what is the correlation between serum isthmin-1 and RA disease activity? what is the correlation between serum isthmin-1 level and MSUS finding in RA patients?

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

Rheumatoid arthritis is a chronic autoimmune disease characterized by persistent synovitis, pannus formation, and bone erosion leading to joint damage and functional impairment . It manifests as a symmetrical polyarthritis predominantly affecting the small joints of the hands, the earliest and most severely affected site in RA. A total of 94% of the patients suffered from at least one hand or wrist symptom after 2-4 years of disease duration. The most frequently described symptoms were pain, stiffness of the hand, muscle weakness, paresthesia, and a limited fist, which significantly impair their daily hand function. Current monitoring tools, including ESR, CRP, and DAS-28, lack sensitivity for subclinical synovitis. These limitations underscore the need for novel biomarkers integrating systemic inflammatory activity with joint pathology and functional status.

Isthmin-1 (ISM1), a multifunctional adipokine that suppresses NF-κB pathway, thereby reducing pro-inflammatory cytokine production and promoting tissue repair . This mechanism holds relevance in RA, where aberrant NF-κB activation drives synovitis and Th17-mediated immune responses . Its observed reduction in active RA signifies a loss of endogenous anti-inflammatory counter-regulation, establishing ISM1 as a promising biomarker for disease activity monitoring .

Musculoskeletal ultrasound (MSUS) provides superior sensitivity compared to physical examination for detecting synovitis (. MSUS findings correlate with structural damage and functional decline, making it a valuable tool for monitoring disease impact on hand joints . This study investigates correlations between serum ISM1 levels, MSUS findings, and hand function to identify biological links for novel RA therapies that preserve joint function and enhance quality of life.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
66

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Amera I Abd el-Ghany, ass. lecturer
  • Phone Number: 01003139319
  • Email: amera_i95@yahoo.com

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adult patients (≥18 years old) clinically diagnosed with rheumatoid arthritis according to the 2010 ACR/EULAR classification criteria.

Description

Inclusion Criteria:

-Adult patients (≥18 years old) clinically diagnosed with rheumatoid arthritis according to the 2010 ACR/EULAR classification criteria.

Exclusion Criteria:

  • Patients less than 18 years old.
  • Patients with other autoimmune diseases.
  • Participants with active infections, malignancies or diabetes.
  • Recent hand surgery, trauma, deformity and neurological conditions affecting hand function

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
rheumatoid arthritis patient
age and sex matched healthy control

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Detection of serum isthmin-1 level in RA patients compared to healthy controls.
Time Frame: baseline
The quantitative level of Human ISM1 will be measured with a commercial enzyme-linked immunosorbent assay(ELISA) kit.
baseline

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
To correlate serum ISM1 levels with disease activity in RA
Time Frame: baseline
through clinical and acute phase reactant
baseline

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Amera Imam Abdel - Ghany Ahmed

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 16, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 25, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 28, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 25, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Isthmin-1, Rheumatoid ,MSUS

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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