Centre Hospitalier Universitaire de Clermont Ferrand

Migraine is a frequent and debilitating neurologic disorder. It is more frequent in women, and more prevalent in patients with autoimmune and/or inflammatory diseases such as multiple sclerosis (MS), rheumatoid arthritis (RA), Crohn's disease (CD), systemic lupus erythematosus (SLE) and endometriosis, whereas patients with long standing type 1 diabetes mellitus (T1DM) - an autoimmune but non inflammatory disease - seem to be less affected compared to the general population. Despite new migraine prevention treatments, a large number of patients remain unresponsive to currently available anti-migraine therapy and migraine pathophysiology remains unclear. Several peptides (calcitonin gene-related peptide (CGRP), pituitary adenylate cyclase activating peptide-38 (PACAP-38), vasoactive intestinal polypeptide (VIP)) and hormones (estrogens, prolactin) and the immune system play an important role in migraine pathophysiology. Among T lymphocytes, regulatory T (Treg) cells suppress inflammation. Studies have evidenced higher levels of inflammatory molecules (cytokines) in migraine patients and have suggested decreased proportions of Treg cells in migraine, as well as in MS, RA, CD and SLE, whereas inflammation declines and Treg levels seem increased in long-standing T1DM. Inflammation, which participates in migraine pain, seems to be a common factor for migraine and these diseases. However, these studies display conflicting results and further investigation is required to better understand the mechanisms behind migraine.
In this study, the investigators will compare Treg levels, as well as identify Treg subpopulations and measure cytokine levels in migraine and migraine-free participants with and without an autoimmune/inflammatory disorder (MS, RA, CD, SLE, T1DM and endometriosis).

The main objective of this study is, after collecting serum enriched with metabolites of interest resulting from the ingestion of the Kera-Diet® food supplement, to determine the influence of these sera enriched with circulating metabolites (versus naïve sera) on the behavior of human cell cultures, placed under stress conditions or not, in order to evaluate the benefit of these metabolites in maintaining cellular functions.

Transcatheter Aortic Valve Implantation (TAVI) aims to treat patients with symptomatic narrowing of the aorta by implanting an aortic bioprosthesis. This technique, which is currently highly developed, can lead to the appearance of cardiac conduction disorders following implantation, and in particular the presence of a junctional rhythm. Junctional rhythms are tachycardias involving a circuit between the atria and the ventricles (junction between the two compartments atrium and ventricle).
The goal of this observational study is to describe the incidence and pronostic of this rhythm disorder (junctional rhythm) following the TAVI procedure.