Periodontitis and Inflammation — CB-PARO  

Periodontitis Clinical Trial

Official title: Characterization of the Immuno-inflammatory Response Involved in Bone Destruction During Periodontitis: Study With Biological Collection

Status Recruiting

Clinical Trial Summary

Today, to understand pathogenic mechanisms involved in periodontitis remains a challenge to identify biomarkers or therapeutic targets to improve prevention and screening, as well as the effectiveness of periodontitis treatments. The aim is to characterize, in vivo, specific molecular markers reflecting the activity of the pathology, which could lead to

• improve the knowledge of the pathogenesis of periodontitis;

• determine target molecules involved in tissue destruction;

• determine molecular profiles of patients at local and systemic risk;

• determine therapeutic targets

For this purpose, biological samples will be collected (plaque, saliva, crevicular fluid) from patients with periodontitis stage 3 or 4 versus patients with a healthy periodontium. Biological samples will be collected before and all along the periodontal treatment. Gingiva explants collection will be sampling within the surgical procedures (if they are needed).

The primary objective is to investigate tissue and cellular expression of molecular markers associated with periodontal destruction during periodontitis in relation to periodontal infection and systemic changes in host response. A characterization of the cytokines in gingival fluid and unstimulated saliva (Luminex® technique) of patients with periodontitis versus without periodontitis will be done.

The secondary objective is to study the influence of periodontitis on systemic pathologies via serum analysis of molecules and bacteria involved in periodontal destruction. Immunofluorescence evaluation of protein expression and distribution (inflammatory mediators, inflammatory pathway signaling proteins) in gingival explants, characterization of proteases (MMP) present in gingival fluid and unstimulated saliva (Luminex® technique) and microbiological analysis of the subgingival biofilm (by quantitative PCR).

Clinical Trial Description

Today, to understand pathogenic mechanisms involved in periodontitis remains a challenge to identify biomarkers or therapeutic targets to improve prevention and screening, as well as the effectiveness of periodontitis treatments. The aim is to characterize, in vivo, specific molecular markers reflecting the activity of the pathology, which could lead to

• improve the knowledge of the pathogenesis of periodontitis;

• determine target molecules involved in tissue destruction;

• determine molecular profiles of patients at local and systemic risk;

• determine therapeutic targets

The research focuses on the characterization of the immuno-inflammatory response involved in periodontitis. A characterization of the mediators or cells involved will be performed from biological samples (gingival fluid, unstimulated saliva, gingival explants). The gingival fluid is composed of serum inflammatory exudate and inflammatory mediators produced locally in the periodontal pocket. Unstimulated saliva is a biological fluid composed in part of the gingival fluid that drains into it. It has the advantage of being easier to collect (larger quantity, collection by any health professional).

This is a non-interventional, cross-sectional, multicenter, prospective, open-label, non-randomized study to collect tissue, crevicular, salivary, and serum samples as part of the patient's routine care in oral medicine departments to form a biological collection. The samples and the clinical data of the patients (excel file with anonymized data and locked by a password) will be transferred to UR2496 for their analysis.

Patients will be recruited in the oral medicine departments of AP-HP hospitals (Charles Foix (Ivry/seine) and Henri Mondor (Créteil)) by periodontists in two groups (cases = periodontitis and controls = healthy periodontium but patients requiring surgical care).

The time-line of the research is consistent with the usual patient management in oral medicine departments. Inclusion period is 12 months. There is no specific follow-up due to the research.

Gingival tissue sampling during surgery of patients will be performed after their inclusion. ;

Related Conditions & MeSH terms

• Periodontitis

• NCT number: NCT04831060
• Study type: Observational
• Source: Assistance Publique - Hôpitaux de Paris
• Contact: Marjolaine GOSSET, Professor
• Phone: +33 6 19 39 39 01
• Email: marjolaine.gosset@aphp.fr
• Status: Recruiting
• Start date: February 15, 2023
• Completion date: November 15, 2025