All MSC populations are not equivalent; care should be taken to select cells for clinical use that minimize potential safety problems and maximize chance of patient benefit. Adipose-derived MSCs seem more consistently procoagulant than BM-MSCs, presenting a potential safety concern for systemic administration in coagulopathic patients. Donor variation exists between different cell populations, and culture handling conditions may also determine coagulation activity. Cells must be routinely monitored during preparation to ensure that they retain the desired characteristics before patient administration.

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