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-F1F1F1S1F1F1F10,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