Answer :
An immune response to a tissue graft will differ from an immune response to a bacterium because MHC molecules of the donor may stimulate rejection of the graft tissue, but bacteria lack MHC molecules
What is referred to as tissue graft rejection?
Graft rejection after solid organ transplantation is a complicated process involving a variety of immunological mediators.
- T cells and cytokines have been shown to play important roles in many animal models of graft rejection, as well as in human transplant patients.
Prophylactic therapy of graft rejection using immunosuppressive medicines such as cyclosporine and mycophenolate mofetil, as well as reduction of cytokine synthesis and activity by glucocorticoids and anti-IL2R antibodies, is the current standard of care.
- In certain cases, the antibody is obviously engaged in graft rejection, but its significance in acute and chronic rejection is unknown.
- Transplant biologists continue to strive for specific modulation of these immune responses and the subsequent graft tolerance in adults.
Hence, the correct answer is option A
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