title: Dynamics of the early immune cellular reactions after myogenic cell transplantation.
abstract: The role of immune cells in the early donor cell death/survival following myoblast transplantation is confusing, one of the reasons being the lack of data about the immune reactions following cell transplantation. We used outbred mice as hosts for transplantation of primary cultured muscle cells and T-antigen-immortalized myoblasts. The host muscles were analyzed 1 h to 7 days after cell injection. No net loss of the donor primary cultured cell population was observed in this period. The immune cellular reaction in this case was: 1) a brief (<48 h) neutrophil invasion; 2) macrophage infiltration from days 1 to 7; 3) a specific response involving CTL and few NK cells (days 6 and 7), preceded by a low CD4+ cell infiltration starting at day 3. In contrast, donor-immortalized myoblasts completely disappeared during the 7-day follow-up. In this case, an intense infiltration of CTL and macrophages, with moderate CD4+ infiltration and lower amounts of NK cells, was observed starting at day 2. The nonspecific immune response at days 0 and 1 was similar for both types of donor cells. The present observations set a basis to interpret the role of immune cells on the early death/survival of donor cells following myoblast transplantation.
authors.affiliation: Unité de recherche en Génétique humaine, Centre de Recherche du Centre Hospitalier de l'Université Laval, CHUL du CHUQ, Quebec, Canada G1V 4G2.
authors.forename: Daniel
authors.initials: D
authors.lastname: Skuk
authors.forename: Nicolas
authors.initials: N
authors.lastname: Caron
authors.forename: Marlyne
authors.initials: M
authors.lastname: Goulet
authors.forename: Brigitte
authors.initials: B
authors.lastname: Roy
authors.forename: Francisco
authors.initials: F
authors.lastname: Espinosa
authors.forename: Jacques P
authors.initials: JP
authors.lastname: Tremblay
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D016923:Cell Death / Q000276:immunology; D002461:Cell Line, Transformed / Q000276:immunology / Q000637:transplantation*; D002634:Chemotaxis, Leukocyte / Q000276:immunology; D005260:Female; D006085:Graft Survival / Q000276:immunology*; D006087:Graft vs Host Reaction / Q000276:immunology*; D007694:Killer Cells, Natural / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D008297:Male; D051379:Mice; D032342:Muscle Cells / Q000276:immunology / Q000637:transplantation*; D032446:Myoblasts / Q000276:immunology / Q000637:transplantation*; D009504:Neutrophils / Q000276:immunology; D033581:Stem Cell Transplantation / Q000009:adverse effects*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology