Autologous Cellular Therapy (ACT) encompasses a range of autologous, cell-based regenerative approaches including autologous adipose-derived regenerative cell therapies, bone marrow mononuclear stem cell implantation/concentrates, and other stem or progenitor cell–based interventions. Modalities described include injection of adipose-derived regenerative cells or stromal vascular fraction (SVF), autologous microfragmented adipose tissue products (eg, Lipogems), bone marrow aspirate concentrate (BMAC) or bone marrow mononuclear cell transplantation, and autologous muscle or muscle progenitor cell injections.
ACT has been proposed for indications such as knee osteoarthritis (KOA), peripheral arterial disease/critical limb ischemia (PAD/CLI), musculoskeletal repair (tendons, ligaments, rotator cuff, ACL, tendon disorders), and scleroderma-related hand dysfunction (including adipose-derived regenerative cell [ADRC] therapy for systemic sclerosis).
The published evidence base is mainly preliminary and heterogeneous — dominated by animal studies, case reports/series, observational studies, and some RCTs and systematic reviews/meta-analyses. While some trials and reviews report improvements in symptoms, function, wound healing, or surrogate measures (eg, ABI, TcPO2), overall study quality is variable and often low, with methodological limitations, inconsistent results, and short follow-up. High-quality randomized controlled trials with standardized methods and longer follow-up are needed to establish safety and efficacy across indications.