Why does tissue damage occurs in acute rejection after organ transplantation?
A) Th1 cells release cytokines that activate infiltrating macrophages, and cytotoxic T cells directly attack the endothelial cells of the transplanted tissue.
B) Circulating immune complexes are deposited in the endothelial cells of transplanted tissue, where the complement cascade lyses tissue.
C) Receptors on natural killer cells recognize antigens on the cell surface of transplanted tissue, which releases lysosomal enzymes that destroy tissue.
D) Antibodies coat the surface of transplanted tissue to which mast cells bind and liberate preformed chemical mediators that destroy tissue.

Question

Quizplus · Accepted Answer

The recipient's lymphocytes interacting with the donor's dendritic cells within the transplanted tissue usually initiate sensitization,resulting in the induction of recipient Th1 and Tc cells against the donor's antigens.The Th1 cells release cytokines that activate infiltrating macrophages,and the Tc cells directly attack the endothelial cells in the transplanted tissue.The other options do not accurately describe how acute rejection after organ transplantation results in tissue damage.

Why Does Tissue Damage Occurs in Acute Rejection After Organ