The research aims to compare the inflammatory status of visceral adipose tissue from obese patients depending on the presence and severity of periodontitis, in order to establish a potential causal link between the severity of the bacterial contamination and insulin resistance.
Recruitment of patients will be achieved in the department of digestive surgery. It will involve 122 patients with severe obesity undergoing bariatric surgery scheduled within the digestive surgery department. Patients recruited will be examined for evaluating the presence and severity of periodontitis, and separated into either group 1: for patients with moderate or severe periodontitis, and or group 2: for patients without or with mild periodontitis. The day before the surgery, blood sample will be collected for the analysis of circulating metabolic and inflammatory markers. Collection of stimulated saliva, periodontal sample and faeces samples (50 g) will also be carried out for bacteria determination. During the surgical procedure, a sample of visceral adipose tissue (50 g) will be collected and used for periodontal bacteria detection and inflammatory markers analyses.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
DOUBLE
Enrollment
122
Patients exhibiting moderate to severe periodontitis
Patients without existing periodontitis or exhibiting mild periodontitis
CHU de La Réunion
Saint-Pierre, Reunion
RECRUITINGInflammatory status of visceral adipose tissue from obese patients depending on the presence and severity of periodontitis
Measurements of major adipocytokines (Interleukine 6, Leptin, Adiponectin, Tumor Necrosis Factor-alpha, Monocyte Chemoattractant Protein-1, macrophage F4/80 receptor, CD11c, nuclear factor-kappa B, Toll Like Receptor 2/4 )
Time frame: Consecutively to visceral fat biopsy (day of surgery)
Detection of DNA for at least one type of periodontal pathogens in adipose tissue
Aggregatibacter actinomycetemcomitans, Fusibacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia, Treponema denticola and Tannerella forsythia
Time frame: Consecutively to visceral fat biopsy (day of surgery)
Description of the metabolic profile of patients relative to periodontitis severity
glycemia, insulinemia, glucose tolerance, plasma and HDL total cholesterol, triglycerides
Time frame: Consecutively to periodontal examination (day before surgery)
Link between adipose tissue inflammatory status, bacterial contamination and metabolic profile of patients
adipose tissue inflammatory status, periodontal bacterial contamination,diabetic disorders, lipid metabolic profile of patients
Time frame: Consecutively to periodontal examination and fat biopsy (day before surgery, day of surgery)
Link between the presence of periodontal pathogens in adipose tissue and their detection in saliva and plasma
Detection of antibodies directed to periodontal bacteria in saliva and plasma
Time frame: Consecutively to periodontal examination and fat biopsy (day before surgery, day of surgery)
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