Investigation of Filaggrin Gene Mutations Among Latinx Patients With Atopic Dermatitis

April 23, 2026 updated by: University of Pennsylvania
The study, Investigation of Filaggrin Gene Mutations among Latinx patients with Atopic Dermatitis, will examine the association between pathogenic FLG LOF variants and AD in a new population of Latinx patients for which clinical and disease characteristics will be well-described.

Study Overview

Status

Enrolling by invitation

Conditions

Detailed Description

Filaggrin deficiency is considered a major target for therapy in Atopic Dermatitis (AD).43 The current status quo with regards to FLG LOF mutations as the strongest known genetic risk factor in AD stems from incomplete data as the majority of studies that have previously examined this association have been carried out in only a limited group of populations (i.e., European ancestry).30 Such partial data impedes our full understanding of genetic risk in AD and consequently has implications for disease prognosis and management. The proposed research represents an attempt to examine long-held paradigms in AD as they relate to genetic risk factors and disease. The development of an independent cohort of Latinx subjects with physician-confirmed diagnosis of AD that is also well phenotyped and grouped by ancestry, while also capturing measures of disease severity, will provide the opportunity to examine a population that has been largely absent from prior studies and further advance our understanding of the pathogenomic role FLG LOF variants in AD.

Study Type

Observational

Enrollment (Estimated)

300

Contacts and Locations

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

Study Locations

  • United States
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19140
        • The University of Pennsylvania

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

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Participants who self-identify as Latino/Latinx or Hispanic ethnicity and who have an established diagnosis of AD based on physician report of at least one-year duration will be considered eligible for this study.

Description

Inclusion Criteria:

  • Established diagnosis of AD based on physician report of at least one-year duration
  • Self-identification as Latino/Latinx or Hispanic

Exclusion Criteria:

-

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
To identify and describe Filaggrin (FLG) loss of function (LOF) variants in the GAD-L cohort using a high-throughput PCR approach that incorporates Fluidigm microfluidics technology and next-generation sequencing (NGS) to sequence the entire FLG gene.
Time Frame: 2 year data/sample collection period - cross-sectional cohort study of patients with a diagnosis of atopic dermatitis
2 year data/sample collection period - cross-sectional cohort study of patients with a diagnosis of atopic dermatitis

Other Outcome Measures

Outcome Measure
Time Frame
To examine the correlation between loss of function (LOF) Filaggrin (FLG) mutations and disease onset and severity among Latinx patients with atopic dermatitis (AD).
Time Frame: 2 year data/sample collection period - cross-sectional cohort study of patients with a diagnosis of atopic dermatitis
2 year data/sample collection period - cross-sectional cohort study of patients with a diagnosis of atopic dermatitis

Collaborators and Investigators

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

Sponsor

University of Pennsylvania

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 (Actual)

January 23, 2025

Primary Completion (Estimated)

December 31, 2027

Study Completion (Estimated)

December 31, 2027

Study Registration Dates

First Submitted

May 10, 2024

First Submitted That Met QC Criteria

June 17, 2024

First Posted (Actual)

June 18, 2024

Study Record Updates

Last Update Posted (Actual)

April 24, 2026

Last Update Submitted That Met QC Criteria

April 23, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 853590

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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