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    Cancer Cell. 2011 Dec 13;20(6):701-14. doi: 10.1016/j.ccr.2011.11.002. Epub 2011 Dec 1.

    VCAM-1 promotes osteolytic expansion of indolent bone micrometastasis of breast cancer by engaging α4β1-positive osteoclast progenitors.

    Lu X, Mu E, Wei Y, Riethdorf S, Yang Q, Yuan M, Yan J, Hua Y, Tiede BJ, Lu X, Haffty BG, Pantel K, Massagué J, Kang Y.

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    Department of Molecular Biology, Princeton University, NJ 08544, USA.

    Abstract

    Breast cancer patients often develop locoregional or distant recurrence years after mastectomy. Understanding the mechanism of metastatic recurrence after dormancy is crucial for improving the cure rate for breast cancer. Here, we characterize a bone metastasis dormancy model to show that aberrant expression of vascular cell adhesion molecule 1 (VCAM-1), in part dependent on the activity of the NF-κB pathway, promotes the transition from indolent micrometastasis to overt metastasis. By interacting with the cognate receptor integrin α4β1, VCAM-1 recruits monocytic osteoclast progenitors and elevates local osteoclast activity. Antibodies against VCAM-1 and integrin α4 effectively inhibit bone metastasis progression and preserve bone structure. These findings establish VCAM-1 as a promising target for the prevention and inhibition of metastatic recurrence in bone.

    Copyright © 2011 Elsevier Inc. All rights reserved.

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    PMID:
    22137794
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC3241854
    [Available on 2012/12/13]

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