Mesenchymal Stem Cell Therapy Awareness, Knowledge, and Use for the Treatment of Fistulizing Crohn's Disease: An International Survey Among Gastroenterologists and Colorectal Surgeons

Introduction Mesenchymal stem (or stromal) cells are a promising therapy for the treatment of various inflammatory and autoimmune diseases. This study aimed to understand awareness, knowledge, and perception of mesenchymal stem cells among gastroenterologists and colorectal surgeons, with particular focus on the perianal fistulizing Crohn's disease indication. Methods A web-based questionnaire was distributed to currently practicing and registered gastroenterologists and colorectal surgeons across 15 countries in North America, Europe, and Asia Pacific. Results Of 146 clinicians, 115 (79%) were aware of mesenchymal stem cells. The majority were moderately to largely interested in this therapy (87%), willing to use it in patients with perianal fistulizing Crohn's disease (82%), and believed it addresses unmet needs for these patients (93%). However, most responders reported having limited or no knowledge of this therapy (64%) or its efficacy (51%), safety (53%), and mechanism of action (65%) in perianal fistulizing Crohn's disease. Many clinicians (46%) also expressed concerns about using this therapy in these patients. Attending discussions and presentations on mesenchymal stem cells and seeing more patients with Crohn's disease were associated with increased awareness (both P < 0.001). Conclusions Many clinicians demonstrated an interest in mesenchymal stem cells in general and a willingness to use them to treat perianal fistulizing Crohn's disease, but this survey showed suboptimal knowledge of what mesenchymal stem cells are and how they work in this indication. This may explain clinicians' concerns about use of this therapy and calls out for education activities.