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: Crohn's disease (CD) which usually leads to anal fistulas among patients is the most important inflammatory bowel disease that causes morbidity in many people around the world. This review article proposes using MSCs as a hopeful therapeutic strategy for CD and anal fistula treatment in both preclinical and clinical conditions. Finally, Darvadstrocel - a cell based medication to treat complex anal fistulas in adults- as the only European Medicines Agency (EMA)-approved product for the treatment of anal fistulas in CD is addressed. Although several common therapies such as surgery and anti-tumor necrosis factor-alpha (TNF-α) drugs as well as a combination of these methods is used to improve this disease, however, due to the low effectiveness of these treatments, the use of new strategies with higher efficiency is still recommended. Cell therapy is among the new emerging therapeutic strategies that have attracted great attention from clinicians due to its unique capabilities. One of the most widely used cell sources administrated in cell therapy is mesenchymal stem cell (MSC). This review article will discuss preclinical and clinical studies about MSCs as a potent and promising therapeutic option in the treatment of CD and anal fistula.

Chimeric Antigen Receptor T-cells represent a breakthrough in personalized cancer therapy. In this strategy, synthetic receptors comprised of antigen recognition, signaling, and stimulatory domains are used to reprogram T-cells to target tumor cells for destruction. Despite the success of this approach in refractory B-cell malignancies, optimal potency of CAR T-cell therapy for many other cancers, particularly solid tumors, has not been achieved. NK cells are powerful cytotoxic lymphocytes specialized in recognizing and dispensing with changed cells, and in coordinating versatile anti-tumor immunity.NK cells are as a rule practically depleted within the tumor microenvironment. In like manner, current investigate endeavors center on exactness designing of CAR T-cells with routine CRISPR-Cas9 frameworks or novel editors that can introduce craved hereditary changes with or without presentation of a double-stranded break into the genome. These instruments and methodologies can be specifically connected to focusing on negative controllers of T-cell work, coordinating helpful transgenes to particular genomic loci, and producing reproducibly secure and powerful allogeneic widespread CAR T-cell items for on-demand cancer immunotherapy. The revelation and improvement of the CRISPR/Cas9 innovation offer an adaptable and proficient gene-editing capability in tweaking different pathways that intercede NK cell fatigue and in outfitting NK cells with novel chimeric antigen receptors to particularly target tumor cells. Despite the tall productivity in its geneediting capability, trouble within the conveyance of the CRISPR/Cas9 framework remains a major bottleneck for its restorative applications, especially for NK cells.This review assesses a few of the progressing and future bearings of combining next-generation CRISPR-Cas9 quality altering with manufactured science to optimize CAR T-cell and NK cell treatment for future clinical trials toward the foundation of a modern cancer treatment parade.