Abstract . We investigated the ability of autologous/allogeneic mesenchymal stem cells (MSC) from early passages, derived from bone marrow of patients with multiple sclerosis, to inhibit mitogen/myelin-induced proliferation  of  memory  T  cells.  It  was  shown  that  MSC  immunosuppressive  potential  of  myelin-induced T-cell memory proliferation was significantly higher than an appropriate suppressive effect upon mitogenstimulated cells. These data provide an evidence for a possible pathogenetic role of MSCs in suppression of myelin-specific proliferation of effector lymphoid cells. Immunoregulatory mechanisms of mesenchymal stem cells  have  been  determined.  It  has  been  shown  that both soluble factors and cell-mediated interactions may be  involved  in  immunosuppressive  activity  of  MSCs.  Moreover, soluble mediators of MSC immunoregulatory properties, e.c., prostaglandin E2 and indoleamine 2,3-dioxygenase,  were  not  produced  in  constitutive  manner,  but  they  require  a  paracrine  signal  from T-lymphocytes. The data obtained may be used for development of an individual approach, in order to estimate immunomodulatory properties of MSCs and for further application of cell cultures in pathogenetic therapy of multiple sclerosis. ( Med. Immunol., 2011, vol. 13, N 2-3, pp 237-246 )

Abstract. We investigated the ability of autologous/allogeneic mesenchymal stem cells (MSC) from early passages, derived from bone marrow of patients with multiple sclerosis, to inhibit mitogen/myelin-induced proliferation of memory T cells. It was shown that MSC immunosuppressive potential of myelin-induced T-cell memory proliferation was significantly higher than an appropriate suppressive effect upon mitogenstimulated cells. These data provide an evidence for a possible pathogenetic role of MSCs in suppression of myelin-specific proliferation of effector lymphoid cells. Immunoregulatory mechanisms of mesenchymal stem cells have been determined. It has been shown that both soluble factors and cell-mediated interactions may be involved in immunosuppressive activity of MSCs. Moreover, soluble mediators of MSC immunoregulatory properties, e.c., prostaglandin E2 and indoleamine 2,3-dioxygenase, were not produced in constitutive manner, but they require a paracrine signal from T-lymphocytes. The data obtained may be used for development of an individual approach, in order to estimate immunomodulatory properties of MSCs and for further application of cell cultures in pathogenetic therapy of multiple sclerosis. (Med. Immunol., 2011, vol. 13, N 2-3, pp 237-246)

Mesenchymal stem cells from the adipose tissue of patients with postoperative hernias produce excessive amounts of collagen III, which shifts the balance between type III and type I collagens. The proposed technique of pretransplantation preparation allows in vitro stimulation collagen formation processes with predominant activation of collagen I synthesis and normalization of proportion between different collagen types. Abdominal wall repair with polypropylene surgical mesh in combination with autotransplantation of mesenchymal stem cells reduced the collagen III to collagen I ratio due to activation of collagen I synthesis and suppression of collagen III production, which had a positive effect on the structure of in vivo formed connective tissue.