PMID- 34360736 OWN - NLM STAT- MEDLINE DCOM- 20210908 LR - 20210908 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 22 IP - 15 DP - 2021 Jul 26 TI - Regulatory Macrophages and Tolerogenic Dendritic Cells in Myeloid Regulatory Cell-Based Therapies. LID - 10.3390/ijms22157970 [doi] LID - 7970 AB - Myeloid regulatory cell-based therapy has been shown to be a promising cell-based medicinal approach in organ transplantation and for the treatment of autoimmune diseases, such as type 1 diabetes, rheumatoid arthritis, Crohn's disease and multiple sclerosis. Dendritic cells (DCs) are the most efficient antigen-presenting cells and can naturally acquire tolerogenic properties through a variety of differentiation signals and stimuli. Several subtypes of DCs have been generated using additional agents, including vitamin D3, rapamycin and dexamethasone, or immunosuppressive cytokines, such as interleukin-10 (IL-10) and transforming growth factor-beta (TGF-beta). These cells have been extensively studied in animals and humans to develop clinical-grade tolerogenic (tol)DCs. Regulatory macrophages (Mregs) are another type of protective myeloid cell that provide a tolerogenic environment, and have mainly been studied within the context of research on organ transplantation. This review aims to thoroughly describe the ex vivo generation of tolDCs and Mregs, their mechanism of action, as well as their therapeutic application and assessment in human clinical trials. FAU - Suuring, Maaike AU - Suuring M AD - Centre de Recherche en Transplantation et Immunologie-UMR1064, INSERM-ITUN, Nantes Universite, CHU Nantes, 44000 Nantes, France. FAU - Moreau, Aurelie AU - Moreau A AUID- ORCID: 0000-0002-8519-2632 AD - Centre de Recherche en Transplantation et Immunologie-UMR1064, INSERM-ITUN, Nantes Universite, CHU Nantes, 44000 Nantes, France. LA - eng GR - H2020-MSCA-ITN-2019 860003/European Commission/ PT - Journal Article PT - Review DEP - 20210726 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (IL10 protein, human) RN - 0 (Transforming Growth Factor beta) RN - 130068-27-8 (Interleukin-10) RN - 1C6V77QF41 (Cholecalciferol) SB - IM MH - Animals MH - *Arthritis, Rheumatoid/immunology/therapy MH - *Cell- and Tissue-Based Therapy MH - Cholecalciferol/pharmacology MH - *Dendritic Cells/immunology/transplantation MH - *Diabetes Mellitus, Type 1/immunology/therapy MH - Humans MH - *Immune Tolerance MH - Interleukin-10/pharmacology MH - *Macrophages/immunology/transplantation MH - Transforming Growth Factor beta/pharmacology PMC - PMC8348814 OTO - NOTNLM OT - cell therapy OT - clinical trials OT - regulatory macrophages OT - regulatory myeloid cells OT - safety OT - tolerogenic dendritic cells COIS- The authors declare no conflict of interest. EDAT- 2021/08/08 06:00 MHDA- 2021/09/09 06:00 PMCR- 2021/07/26 CRDT- 2021/08/07 01:07 PHST- 2021/05/31 00:00 [received] PHST- 2021/07/22 00:00 [revised] PHST- 2021/07/23 00:00 [accepted] PHST- 2021/08/07 01:07 [entrez] PHST- 2021/08/08 06:00 [pubmed] PHST- 2021/09/09 06:00 [medline] PHST- 2021/07/26 00:00 [pmc-release] AID - ijms22157970 [pii] AID - ijms-22-07970 [pii] AID - 10.3390/ijms22157970 [doi] PST - epublish SO - Int J Mol Sci. 2021 Jul 26;22(15):7970. doi: 10.3390/ijms22157970.