ROR1 and ROR2 in Human Malignancies: Potentials for Targeted Therapy

Area of Science:

• Oncology
• Molecular Biology
• Pharmacology

Background:

• Targeted cancer therapies require specific protein expression for efficacy and safety.
• Receptor tyrosine kinase-like orphan receptors (RORs) are transmembrane proteins implicated in tumor cell migration and invasiveness.
• RORs are typically not expressed in normal adult tissues but are found in human cancers.

Purpose of the Study:

• To review the biology of RORs in relation to human cancer.
• To highlight therapeutic strategies targeting RORs.
• To explore RORs as potential targets for novel cancer treatments.

Main Methods:

• Literature review of ROR biology and cancer expression.
• Analysis of RORs' role in tumor-like behaviors (migration, invasiveness).
• Examination of therapeutic approaches, including small molecule kinase inhibitors and antibody-based therapies.

Main Results:

• RORs are expressed in human cancers, suggesting potential as therapeutic targets.
• The restricted expression of RORs on tumor cells, not normal tissues, is advantageous for targeted therapy.
• RORs are identified as promising targets for treating minimal residual disease in various cancers.

Conclusions:

• RORs represent a novel class of therapeutic targets for small molecule or antibody-based cancer therapies.
• The unique expression profile of RORs makes them suitable for targeting minimal residual disease.
• Targeting RORs may offer a new avenue for effective cancer treatment, particularly in solid tumors like neuroblastoma.