Provided herein are antigen-binding proteins (ABPs) that selectively bind to GITR and its isoforms and homologs, and compositions comprising the ABPs. Also provided are methods of using the ABPs, such as therapeutic and diagnostic methods.本文提供選擇性地與GITR結合之抗原-結合蛋白(ABP)及其同功異型物與同源物,以及包含該等ABP之組合物。亦提供使用該等ABP之方法,諸如治療性及診斷性方法。