Compositions, methods, and uses of recombinant B7-H4 protein or binding motifs to B7-H4 protein that can reduce the immune suppression effect of B7-H4 in relation to T cell activation, proliferation, and conversion. Preferably, the recombinant B7-H4 protein has a plurality of mutations in N-glycosylation residue to reduce its inhibitory effect to T cell activation and proliferation. The recombinant protein having binding motifs to B7-H4 protein preferably includes a binding motif to IgC domain and another binding motif to IgV domain such that the immune-suppressive effects by two Ig-like domains are concurrently reduced.
                            重组 B7-H4 蛋白或 B7-H4 蛋白结合基团的组成、方法和用途,可降低 B7-H4 对 T 细胞活化、增殖和转化的免疫抑制作用。优选地,
重组 B7-H4 蛋白的 N-糖基化残基有多个突变,以降低其对 T 细胞活化和增殖的抑制作用。具有与 B7-H4 蛋白结合基团的
重组蛋白最好包括一个与 IgC 结构域结合的基团和另一个与 IgV 结构域结合的基团,从而同时降低两个 Ig 样结构域的免疫抑制作用。