Since its initial identification in 1992 as a possible class I cell-surface receptor without a known parent ligand, receptor-tyrosine-kinase-like orphan receptor 1 (ROR1) has stimulated research, which has made apparent… Click to show full abstract
Since its initial identification in 1992 as a possible class I cell-surface receptor without a known parent ligand, receptor-tyrosine-kinase-like orphan receptor 1 (ROR1) has stimulated research, which has made apparent its significance in embryonic development and cancer. Chronic lymphocytic leukemia (CLL) was the first malignancy found to have distinctive expression of ROR1, which can help distinguish leukemia cells from most non-cancer cells. Aside from its potential utility as a diagnostic marker or target for therapy, ROR1 also factors in the pathophysiology of CLL. Here we review the studies that have elucidated the expression, biology, and evolving strategies for targeting ROR1 that hold promise for improving the therapy of patients with CLL or other ROR1-expressing malignancies.
               
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