Fibroblast Line Evaluation for COL5A eXpression and Thoracic Aortic Aneurysms: in Vitro Characterization of Cutaneous Fibroblasts in Adult Patients (FLEX5 project)

San Donato Group (GSD)

Status: Not yet enrolling

Conditions: Mutations Affecting the COL5A Gene; Aneurysm Aortic

Study type: Observational

Funder types: Other

Identifiers

NCT07282717

FLEX5 project

Details and patient eligibility

About

This study examines adults with COL5A gene mutations to understand why some develop aortic aneurysms while others do not. Participants provide a small skin biopsy, and researchers analyze fibroblasts to evaluate collagen production, extracellular matrix organization, and connective-tissue signaling pathways. The goal is to identify biological differences that may explain variable vascular risk and support future personalized monitoring and treatment strategies.

Full description

Individuals with mutations in the collagent type V, alpha (COL5A) gene show variable clinical outcomes. While some develop aortic aneurysms, others with the same mutation remain free of cardiovascular complications. The mechanisms driving this variability are not fully understood.

This study aims to investigate biological differences at the cellular level by analyzing fibroblasts derived from a small skin biopsy. Fibroblasts play a key role in the production and organization of type V collagen and the extracellular matrix.

Researchers will:

Grow fibroblasts from participants' skin samples.

Assess cell growth, migration, and extracellular matrix formation.

Measure the quantity and type of collagen produced.

Evaluate molecules involved in collagen breakdown and repair.

The study compares individuals with COL5A mutations who have documented aortic aneurysms to those with the same mutation but no vascular involvement. Analyses will also consider differences among family members who share the same genetic variant.

By characterizing fibroblast behavior, the study seeks to clarify why some individuals develop aortic disease while others remain unaffected. Findings may help identify cellular features associated with increased or reduced vascular risk and guide future strategies for monitoring, prevention, and personalized care in patients with COL5A mutations.

Enrollment: 20 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Subjects aged 18 and above
• Mutation in COL5A
• Signed informed consent

Exclusion criteria

• Corticosteroid or Steroids or Fluorochinolones treatment within six months before enrollment
• Subjects on chronic immunosuppressive therapies such as oral steroids, but also on chronic topical steroids in the area of investigation
• Subject on anticoagulant therapy
• History of coagulation factor defects/alterations (data found in anamnesis and medical records)
• A history of keloid formation (data found in anamnesis and medical records)
• Anesthetic drug allergy (data found in anamnesis and medical records)

Trial design

20 participants in 4 patient groups

Adult patients with COL5A with TAAD

Description:

Adult patients (aged over 50 years) with COL5A mutation and aortic manifestations

Adult patients with COL5A mutation without TAAD

Description:

Adult patients (aged over 50 years) with COL5A mutation in the absence of aortic manifestations

Young patients with COL5A mutation and TAAD

Description:

Young patients (aged 18-50 years) with COL5A mutation and aortic manifestations

Young patients with COL5A mutation without TAAD

Description:

Young patients (aged 18-50 years) with COL5A mutation in the absence of aortic manifestations