Journal
CURRENT OPINION IN ORGAN TRANSPLANTATION
Volume 17, Issue 1, Pages 48-54Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MOT.0b013e32834ee64a
Keywords
cell therapy; immunosuppression; regulatory macrophage
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Funding
- EU [260687]
- RISET Consortium
- Deutsche Forschungsgemeinschaft [GE-1188/1-1]
- European Society of Organ Transplantation and American Society of Transplant Surgeons
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Purpose of review To consolidate our basic scientific and technological appreciation of human regulatory macrophages (M reg) as a cell-based medicinal product for use as an adjunct immunosuppressive therapy in organ transplantation. Recent findings Building on the original observation that crude preparations of IFN-g-stimulated allogeneic macrophages prolong allograft survival in experimental animals, we have arrived at a detailed understanding of the derivation, phenotype and T-cell-suppressive potential of a population of in-vitro-derived human macrophages, which have been designated M regs. This basic scientific knowledge has inspired methodological advances in M reg manufacture, leading to a purer and more homogeneous cell product. In turn, cells produced by these improved protocols have been applied in the clinic, so completing a cycle of technological development. Studying the migration and physiological impact of M reg administration in patients provides a measure of reassurance that the procedure is well tolerated. Cutting-edge strategies to assess the immunological status of solid organ transplant recipients allow the biological effects of M reg treatment to be monitored. Summary A view of the human M reg as a novel, stringently defined medicinal product is presented, opening exciting possibilities for its future investigation as a therapy in solid organ transplantation and beyond.
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