Identification of Genomic Biomarkers for Rheumatoid Arthritis with Late Onset

Not yet recruiting

• Conditions: Rheumatoid Arthritis
• Interventions: Other: Salivary sampling

• Registration Number: NCT05808309
• Lead Sponsor: Centre Hospitalier Sud Francilien

Brief Summary

Rheumatoid arthritis (RA) is a disabling disease leading to joint and bones destruction. This autoimmune disease is multifactorial, and some genetic and environmental risk factors are already described. However, a part of heritability is still unknown. Previous genomics studies dedicated to deciphering this missing heritability did not pay attention to age of onset. The purpose of this protocol is to determine genomic markers which are specific of RA with an age of onset above 65 years old. Indeed, clinical presentation, treatment tolerance and efficiency, and frequent comorbidities of this phenotype are particular. This signature of genomic biomarkers will be integrated in known molecular pathways to highlight specificities, helpful for biological targets identification.

Detailed Description

The purpose of this protocol is to identify a genomic signature specific of late onset RA and to contribute to the characterization of dedicated therapeutic targets. Collection of patients will be held at the rheumatology service of CHSF (Corbeil-Essonnes, France) and salivary samples will be collected for further genomic analyses conducted by GenHotel lab (Univ Evry - Univ Paris-Saclay, Evry, France).

First, analysis of whole genome/DNA sequences will allow to identify specific variants of late onset RA. Such identified biomarkers would help differential diagnosis and contribute to earlier initiation of care for RA relatives at risk of developing RA. Second, analysis of RNA sequences, including coding protein genes and non-coding RNA, will give information about gene expression and regulation, and molecular pathways. Comparison of patient groups will allow discrimination of biomarkers and molecular signature specific to the disease and to its onset phenotypes. Integration of such genomic data in the RA disease map (consisted of a network of biological pathways), and further modeling approaches, will highlight late onset RA particularities on which research of therapeutic target could be focused on.

To complete genomic analysis, methylome and proteome data will be produced in a second phase. Such data will help in identification of regulation process leading to a protein profile specific of late onset RA.

An ancillary study is planned from familial samples identified after analysis of data collected from RA patients. Risk genetic markers identification is facilitated in a familial context of analyses. Furthermore, non RA individuals in familial sample provide a control sample allowing better discrimination between family-dependent and phenotype-dependent genomic markers

Study Timeline

• Study First Submitted: 2023-03-29
• Study First Submitted QC: 2023-03-29
• Study First Posted: 2023-04-11
• Status Verified: 2024-11
• Last Update Submitted: 2024-11-22
• Last Update Posted: 2024-11-26
• Study Start: 2025-01-01
• Primary Completion: 2028-01-01
• Study Completion: 2028-01-01

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 300

Inclusion Criteria

• patient with RA diagnosed before 60 years (PRp group)
• patient with RA diagnosed from 65 years (PRt group)
• patient without RA followed for osteoarthritis matched with patient of PRt according to age (+/- 1 year) and sex (Tem group).
• relative of patient PRt, without RA or with RA, regardless of age of onset (Ap group)
• patient who agreed to participate in the study and signed an informed consent

Read More

Exclusion Criteria

• other inflammatory and/or autoimmune known disease for patients of PRp and PRt groups
• first symptoms of osteoarthritis before 40 years, other known inflammatory disease, other known autoimmune disease for Tem group.

Read More

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Ap	Salivary sampling	Relatives to PRt, with RA (with any age of onset) or without RA
PRp	Salivary sampling	Patients with a diagnostic of rheumatoid arthritis with an age of onset before 60 years
PRt	Salivary sampling	Patients with a diagnostic of rheumatoid arthritis with an age of onset from 65 years
Tem	Salivary sampling	Patients with a diagnostic of osteoarthritis without RA

Primary Outcome Measures

Name	Time	Method
Gene expression for late onset rheumatoid arthritis	at day 0	RNA analysis
Genomic signature for late onset rheumatoid arthritis	at day 0	Genomic DNA analysis

Secondary Outcome Measures

Name	Time	Method
Methylome for late onset rheumatoid arthritis	at day 0	DNA methylation profile
Proteome for late onset rheumatoid arthritis	at day 0	Protein profile

Trial Locations

Locations (1)

Centre Hospitalier Sud Francilien; 🇫🇷 Corbeil-Essonnes, France