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Role of cystatins in tumor neovascularization

    Daniel Keppler

    † Author for correspondence

    Louisiana State University Health Sciences Center, Department of Cellular Biology & Anatomy and Feist-Weiller Cancer Center, School of Medicine, Shreveport, 1501 Kings Highway, PO Box 33932, Shreveport, LA 71130, USA.

    &
    Felipe Sierra

    National Institutes of Health/National Institute on Aging, Biology of Aging Program, Building 31, Room 5C27, 31 Center Drive, MSC 2292, Bethesda, MD 20892, USA.

    Published Online:https://doi.org/10.2217/14796694.1.5.661

    Cystatins form a large superfamily of proteins with diverse biologic activities. All members of the cystatin superfamily share the presence of one, two or three cystatin domains. Cystatins were initially believed to act mainly as inhibitors of lysosomal cysteine proteases. In recent years, however, there has been increased awareness of additional or alternate biologic functions for these proteins. In this review, the authors will discuss the most recent findings and hypotheses that suggest that some members of the cystatin superfamily may play important roles during tumor progression. Special emphasis is given to their potential role as novel anti-angiogenic agents.

    Papers of special note have been highlighted as either of interest (•) or of considerable interest (••) to readers.

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