NCT06073171

Genomic Study of Cutis Tricolor

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 10 (estimated)
• Sponsor: University Hospital, Montpellier · Academic / Other
• Sex: All
• Age: 4 Years – 60 Years
• Healthy volunteers: Not accepted

Summary

It's a study on Syndromic or Isolated Cutis Tricolor and had as main goal to identify the associated gene to the disease thanks to genetic analysis on minors patients and their parents reach by cutis Tricolor or not.

Detailed description

Cutis Tricolor (CT) is a rare cutaneous anomaly defined by pigmentary disorders associating large hyper- and hypopigmented macules of immediate proximity, selectively affecting the trunk. CT can be isolated, sporadic or integrated as a complex syndromic form such as Ruggieri-Happle syndrome (RHS) or various forms of pigmentovascular phacomatosis. A recent analysis of one case of RHS followed by CHU of Montpellier by whole exome sequencing allows the identification of a frameshift pathogen variant (heterozygous state) of a candidate gene. The main objective is to confirm the association of the candidate gene with syndromic CT (SCT, Ruggierri-Happle syndrome) and non syndromic CT, from a genetic molecular blood and biopsy analysis of patients reach by CT and their parents presenting the disease or not. Furthermore, other objectives are to identify others associated candidates genes and to know better cutaneous pigmentary troubles factors, neurologics and eye abnormalities by identifying the differents cellulars pathways particularly the inflammatory pathway in the pathology of SCT. First of all, it will have a pre-inclusion visit where Dr WILLEMS. M (Clinical Genetic Department - CHU Montpellier, France) and Pr BESSIS. D (Dermatology Department - CHU Montpellier, France) will explain the study's progress. Then, during the inclusion visit, families will sign inform consent for inclusion in the study. The same day, datas will be collected on demographic, clinical datas, including (i) a description of cutaneous, morphologic and extra-cutaneous anomalies and (ii) a cutaneous biopsy and (iii) a blood test will be done. The genetics exams results will be return to patients during an usual follow-up visit, 12 months after their inclusion in the study.

Conditions

• Pigmentary; Dermatosis

Interventions

Type	Name	Description
BIOLOGICAL	Blood sample	7.5 mL will be sampled on EDTA tube for each patient
BIOLOGICAL	Cutaneous biopsy	4 mm of damaged skin will be sampled after a premedication with lidocaine gel for 4 patients
GENETIC	High troughput sequencing of human's exome	Sequencing on Illumina NovaSeq6000 platform, using the Twist Bioscience Human Core Exome kit + IntegraGen content, average 37Mb. This sequencing will be realised by external provider, IntegraGen society.

Timeline

• Start date: 2024-06-05
• Primary completion: 2026-06-01
• Completion: 2026-12-01
• First posted: 2023-10-10
• Last updated: 2025-10-03

Locations

1 site across 1 country: France