Reims University Hospitals, Maison Blanche Hospital 2 articles published in JoVE Immunology and Infection Measuring Erythrocyte Complement Receptor 1 Using Flow Cytometry Aymric Kisserli1,2, Sandra Audonnet3, Valérie Duret2,4, Thierry Tabary2,4, Jacques Henri Max Cohen2, Rachid Mahmoudi5,6 1Oncogeriatric Coordination Unit, Reims University Hospitals, Maison Blanche Hospital, 2Faculty of Medicine, University of Reims Champagne-Ardenne, 3URCACyt, Flow cytometry technical platform, University of Reims Champagne-Ardenne, 4Department of Immunology, Reims University Hospitals, Robert Debre Hospital, 5Department of Internal Medicine and Geriatrics, Reims University Hospitals, Maison Blanche Hospital, 6Faculty of Medicine, University of Reims Champagne-Ardenne The aim of this method is to determine the CR1 density in the erythrocytes of any subject by comparing with three subjects whose erythrocyte CR1 density is known. The method uses flow cytometry after immunostaining of the subjects' erythrocytes by an anti-CR1 monoclonal antibody coupled to an amplified system using phycoerythrin (PE). Genetics High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment Aymric Kisserli1,2, Thierry Tabary1,2, Jacques Henri Max Cohen1,2, Valérie Duret1,2, Rachid Mahmoudi3,4 1Department of Immunology, Reims University Hospitals, Robert Debré Hospital, 2Faculty of Medicine, LRN EA 4682, University of Reims Champagne-Ardenne, 3Department of Internal Medicine and Geriatrics, Reims University Hospitals, Maison Blanche Hospital, 4Faculty of Medicine, EA 3797, University of Reims Champagne-Ardenne Here, we describe an innovative method to determine complement receptor 1 (CR1) length polymorphisms for use in several applications, particularly the assessment of susceptibility to diseases such as Alzheimer's disease (AD). This method could be useful to better understand the role of CR1 isoforms in the pathogenesis of AD.