Which of the following is NOT a mechanism by which tumors evade immune responses?

Question

Quizplus · Accepted Answer

Many tumor cells will up-regulate expression of Fas-ligand, not Fas, to signal for apoptosis in Fas-expressing leukocytes recruited to the site of the tumor. Other mechanisms of tumor evasion include down-regulation of MHC I molecules as well as the components of the antigen-processing machinery needed for MHC I presentation, such as proteasome subunits and the TAP transporter. Some tumors can also down-regulate costimulatory molecules such as B7. Tumors can also up-regulate expression of immunosuppressive cytokines, such as TGF-β, as well as increase production of glycocalyx polysaccharides that hide or "mask" tumor surface antigens from the immune system.

Which of the Following Is NOT a Mechanism by Which