Question

If a regulatory t cell prevent immunity cells to attack own body cells then how nk cells and cytotoxic t cells manage to attack cancer cells as it is a cell of own body?

Answer 1

Natural killer cells have been initially identified as a lymphoid population ... NK cells express surface receptors (NK cell receptors (NKR)) that can be .... promoted by cancer cells and regulatory T lymphocytes through the secretion of .... promotes tumor growth, selection, and protection from immune attack .............................................................................................

NK cell releases cytotoxic granules containing perforin and granzymes, which leads to lysis of the target cell.