Prospective Exploration of Vascular Complications Associated With the Use of Immune Checkpoint Inhibitors

The various mechanisms involved in vascular complications during ICI therapy could be responsible for early vascular toxicity in the aorta and its main branches, characterized by increased stiffness. This increased arterial stiffness, indicative of premature vascular aging and leading to impaired cardiocirculatory coupling, could be accompanied by subsequent cardiovascular events, or even predictive of immunological complications, even though short-term ICI use does not appear to be associated with the development of hypertension. Thus, the extent of vascular complications induced by ICIs, the mechanisms involved, as well as the progression of vascular damage and the associated long-term consequences after treatment discontinuation in patients in remission, remain poorly understood. In particular, the hypothesis of this research is that an increase in arterial stiffness is induced very rapidly by ICIs due to immune modifications and that the persistence of this increase in stiffness after stopping treatment is associated with an increased cardiovascular risk in patients. Given the increasing use of immune checkpoint inhibitors (ICIs) and the number of patients treated, a better understanding of the vascular impact of these drugs is both necessary and urgent. The results obtained should allow us to determine, for the first time, the vascular impact of ICIs, as well as to identify the immunological mechanisms involved and the long-term prognosis consequences for patients due to potential premature arterial aging induced by ICI treatment. This is a multidisciplinary clinical-biological research study involving the Clinical Pharmacology Department for vascular investigations, the Clinical Investigation Center (CIC-CRB 1404) for biological sampling, and the Dermatology Department (Dr. Janela) for volunteer recruitment and follow-up. This cohort study will also be combined with pharmacoepidemiological and pharmacovigilance studies using the French National and International Pharmacovigilance Databases (BNPV and VigiBase) (Dr. Nathalie Massy). On the other hand, experimental studies will be conducted in murine models of vascular pathologies within the UMR Inserm 1096 EnVI (Dr. Antoine Hérault's PhD thesis, supervised by Professor Fabienne Tamion, Dr. Dominique Modovar and Dr. Ebba Brakenhielm) in order to better understand the role of ICIs in vascular pathophysiology and ultimately be able to propose care and/or treatments adapted to patients receiving ICIs in order to prevent or limit their adverse effects including deleterious cardiovascular consequences.