The invention provides compositions and methods for treating diseases associated with expression of CD20 or CD22. The invention also relates to chimeric antigen receptor (CAR) specific to CD20 or CD22, vectors encoding the same, and recombinant T or natural killer (NK) cells comprising the CD20 CAR or CD22 CAR. The invention also includes methods of administering a genetically modified T cell or NK cell expressing a CAR that comprises a CD20 or CD22 binding domain.本發明提供用以治療與CD20或CD22表現相關之疾病之組合物及方法。本發明亦關於對CD20或CD22具有特異性之嵌合抗原受體(Chimeric Antigen Receptor;CAR)、編碼其等之載體,及包含該CD20 CAR或CD22 CAR之重組T或天然殺手(natural killer;NK)細胞。本發明亦包括投與可表現包含CD20或CD22結合域之CAR之遺傳性地修飾T細胞或NK細胞之方法。