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Mixed heart cell-lymphocyte reactions and graft survivals in Ag-B-compatible rats
Insights
Dissociated rat heart cells, when treated with mitomycin C, effectively stimulate allogeneic lymphocytes. This finding highlights the role of specific antigens in graft rejection, differentiating responses between heart, skin, and kidney cells.
Area of Science:
- Immunology
- Cell Biology
- Transplantation Science
Background:
- Mixed lymphocyte culture (MLC) is a key method for assessing immune responses.
- Understanding cell dissociation techniques is crucial for preparing viable cells for immunological assays.
Purpose of the Study:
- To describe a method for dissociating rat heart cells for use in mixed lymphocyte cultures.
- To investigate the stimulatory capacity of dissociated heart cells on allogeneic lymphocytes.
- To explore the role of specific antigens in graft rejection.
Main Methods:
- Rat hearts were treated with a 0.1% collagenase-hyaluronidase solution to obtain cell suspensions.
- Dissociated heart cells were treated with mitomycin C.
- Mixed lymphocyte cultures were performed using Fischer and Lewis rat strains, with various cell types (heart, skin, kidney, spleen).
Main Results:
- A satisfactory heart cell suspension was obtained using collagenase-hyaluronidase.
- Mitomycin C-treated heart cells, but not irradiated cells, stimulated allogeneic lymphocytes in the presence of 2-mercaptoethanol.
- Strong lymphocyte reactions to heart and skin cells correlated with acute graft rejection, while negative reactions to kidney and spleen cells correlated with prolonged kidney graft survival.
Conclusions:
- Dissociated rat heart cells are suitable for mixed lymphocyte culture purposes.
- Specific antigens present on heart and skin cells play a significant role in acute graft rejection.
- Differential immune responses observed with various cell types provide insights into transplantation outcomes.
Abstract:
A method of dissociation of the rat heart cell for the mixed lymphocyte culture purpose is described. The treatment of the young rat heart with 0.1% collagenase-hyaluronidase solution yielded satisfactory heart cell suspension. The hear cells, thus obtained after mitomycin C treatment but not irradiation, stimulated allogeneic lymphocytes in the presence of 2-mercaptoethanol. In the Fischer to Lewis combination compatible at the Ag-B locus, strong reactions of Lewis lymphocytes to the dissociated heart and skin cells of the Fischer rat were related to the acute rejection of heart and skin grafts, while negative reactions by the kidney and spleen cells reflected a prolonged survival of the kidney graft. The role of skin- and hear-specific antigens in the rejection phenomenon is discussed.