Based on solid preclinical results in mice and preliminary data in humans, this study aims to provide the proof of concept of the crucial role of the hematopoietic process occurring in human adipose tissue in the initiation of the inflammatory process at the origin of insulin resistance and type 2 diabetes (T2D). The main objective is to compare the number of pro-inflammatory macrophages derived from human adipose tissue hematopoietic stem cells (HSC) according to their origin, type 2 diabetes subjects or healthy volunteers.