The present application relates to antibodies specifically binding to the V-domain immunoglobulin-containing suppressor of T-cell activation (VISTA) at acidic pH and their use in cancer treatment. In some embodiments, the antibodies bind specifically to human VISTA at acidic pH, but do not significantly bind to human VISTA at neutral or physiological pH.本申請案係關於在酸性pH特異性結合至T細胞活化之含V域免疫球蛋白之抑制因子(VISTA)之抗體及其在癌症治療中之用途。在一些實施例中,該等抗體在酸性pH特異性結合至人類VISTA,但在中性或生理性pH並不顯著結合至人類VISTA。