alexa The role of osteopontin in breast cancer: clinical and experimental studies.
Diabetes & Endocrinology

Diabetes & Endocrinology

Pancreatic Disorders & Therapy

Author(s): Tuck AB, Chambers AF

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Abstract Osteopontin (OPN) is a secreted, integrin-binding protein which has been implicated in cancer, as well as other pathologies and some aspects of normal development. Here we focus on the role of OPN in breast cancer. We describe studies that have shown that OPN plays a role in normal mammary gland development as well as in progression of breast cancer. We also summarize studies that have shown that OPN can play a functional role in malignancy of breast cancer. At least some of these effects are mediated by specific cell surface integrins (alpha(v)beta3 vs. alpha(v)beta1 and alpha(v)beta5) and lead to increased cell migration, activation of growth factor/receptor pathways (e.g. HGF and EGF), and increased proteolytic enzyme activity (e.g. uPA). We also summarize clinical studies that show that OPN levels in tumors and blood are elevated in women with metastatic breast cancer and may offer promise as prognostic markers in breast cancer.
This article was published in J Mammary Gland Biol Neoplasia and referenced in Pancreatic Disorders & Therapy

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