The present invention provides novel compositions and methods related to or derived from anti-PD-L1 antibodies having ADCC and / or CDC activity. More specifically, the present invention discloses fully human antibodies that bind to PD-L1, PD-L1 binding antibody fragments and derivatives, and PD-L1 binding polypeptides containing these fragments.本發明提供了與具有ADCC和/或CDC活性的抗PD-L1抗體相關或來源於該抗體的新型組合物和方法。更具體地,本發明公開了結合PD-L1的全人源抗體、PD-L1結合抗體片段和衍生物以及包含這些片段的PD-L1結合多肽。