期刊
CANCER TREATMENT REVIEWS
卷 77, 期 -, 页码 11-19出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ctrv.2019.05.006
关键词
Receptor tyrosine kinase-like orphan receptor; ROR; ROR1; ROR2; Cancer; Meta-analysis
类别
Introduction: Identification of membrane proteins expressed exclusively on tumor cells is a goal for cancer drug development. The receptor tyrosine kinase-like orphan receptor type 1 and 2 (ROR1/2), are type-I transmembrane proteins expressed in cancer but not in adult normal tissue. Here, we explore the prognostic role ROR1/2 expression on patient outcome. Methods: A systematic search of electronic databases identified publications exploring the effect of ROR1/2 on overall survival (OS). Hazard ratios (HR) from collected data were pooled in a meta-analysis using generic inverse-variance and random effects modeling. Subgroup analyses were conducted based on disease site or tumor type. Results: Twenty five studies met the inclusion criteria. ROR1 was associated with worse overall survival (HR 2.13, 95% confidence interval (CI) 1.62-2.80; P < 0.001) with subgroup analysis showing the strongest association between ROR1 and OS was in lung cancer. There was no significant difference between solid tumors and hematological malignancies (HR 2.15, 95% CI 1.52-3.06 vs. HR 2.02, 95% CI 1.46-2.84; subgroup difference P = 0.80). ROR2 was also associated with worse OS (HR 1.84, 95% CI 1.43-2.38; P < 0.001). There was no significant difference between disease sites although the highest association seen was in head and neck cancers (HR 3.19, 95% CI 1.13-8.97) and the lowest in gynecological cancers (HR 1.19, 95% CI 0.71-2.00; subgroup difference P = 0.10). Conclusions: ROR1 and ROR2 expression is associated with adverse outcome in several tumors. ROR1/2 warrants study as a target for developmental therapeutics.
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