alexa Bone sialoprotein and osteopontin in bone metastasis of osteotropic cancers.
Oncology

Oncology

Journal of Orthopedic Oncology

Author(s): Kruger TE, Miller AH, Godwin AK, Wang J

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Abstract The mechanisms underlying malignant cell metastasis to secondary sites such as bone are complex and no doubt multifactorial. Members of the small integrin-binding ligand N-linked glycoproteins (SIBLINGs) family, particularly bone sialoprotein (BSP) and osteopontin (OPN), exhibit multiple activities known to promote malignant cell proliferation, detachment, invasion, and metastasis of several osteotropic cancers. The expression level of BSP and OPN is elevated in a variety of human cancers, particularly those that metastasize preferentially to the skeleton. Recent studies suggest that the "osteomimicry" of malignant cells is not only conferred by transmembrane receptors bound by BSP and OPN, but includes the "switch" in gene expression repertoire typically expressed in cells of skeletal lineage. Understanding the role of BSP and OPN in tumor progression, altered pathophysiology of bone microenvironment, and tumor metastasis to bone will likely result in development of better diagnostic approaches and therapeutic regimens for osteotropic malignant diseases. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.
This article was published in Crit Rev Oncol Hematol and referenced in Journal of Orthopedic Oncology

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