Biological Characterization Study of an Autograft Nanofat (Nanocarabio)

Rhizarthrosis (trapeziometacarpal osteoarthritis) is the most common primary osteoarthritis of the hand, and a source of major functional impact, as it affects the thumb. Non-surgical therapeutic means are currently limited to wearing an immobilization splint, analgesics and oral non-steroidal anti-inflammatory drugs. These symptomatic treatments are of limited effectiveness and do not prevent from progression of the osteoarthritis disease. The most effective treatments currently recognized are surgical, but they also have their limits. Cell therapy is considered as a promising approach to treat tissue damage including osteoarthritis. Mesenchymal stromal cells are excellent candidates for achieving this type of result, because they can differentiate into the different tissues from the mesoderm (cartilage, bone, muscle, tendons, fat, dermis, conjunctive matrix, etc.). In addition, unlike cells from the embryonic cord, the risk of teratoma or tumor does not exist. Mesenchymal stem cells have regenerative and immunomodulatory properties but the methods of collection, preparation, combination with substances such as hyaluronic acid, or PRP, or platelet concentrates, will obviously influence the effectiveness of the results. . Nanofat autografts are obtained in a simple way, in a closed circuit, preserving the stromal mesenchymal cells in large numbers with a minimum impact on the cellular elements. The preparation remains simple and inexpensive, but it is nevertheless necessary to characterize these emulsified preparations biologically before using them as cell therapy. The main objective of this study is to characterize a nanofat autograft on a biological level.