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Lecht S , Chiaverelli RA , Gerstenhaber J , Calvete JJ , Lazarovici P , Casewell NR , Harrison R , Lelkes PI , Marcinkiewicz C
Anti-angiogenic activities of snake venom CRISP isolated from Echis carinatus sochureki
Biochim Biophys Acta. 2015 Jun;1850(6) :1169-79
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BACKGROUND: Cysteine-rich secretory protein (CRISP) is present in majority of vertebrate including human. The physiological role of this protein is not characterized. We report that a CRISP isolated from Echis carinatus sochureki venom (ES-CRISP) inhibits angiogenesis. METHODS: The anti-angiogenic activity of purified ES-CRISP from snake venom was investigated in vitro using endothelial cells assays such as proliferation, migration and tube formation in Matrigel, as well as in vivo in quail embryonic CAM system. The modulatory effect of ES-CRISP on the expression of major angiogenesis factors and activation of angiogenesis pathways was tested by qRT-PCR and Western blot. RESULTS: The amino acid sequence of ES-CRISP was found highly similar to other members of this snake venom protein family, and shares over 50% identity with human CRISP-3. ES-CRISP supported adhesion to endothelial cells, although it was also internalized into the cytoplasm in a granule-like manner. It blocked EC proliferation, migration and tube formation in Matrigel. In the embryonic quail CAM system, ES-CRISP abolished neovascularization process induced by exogenous growth factors (bFGF, vpVEGF) and by developing gliomas. CRISP modulates the expression of several factors at the mRNA level, which were characterized as regulators of angiogenesis and blocked activation of MAPK Erk1/2 induced by VEGF. CONCLUSIONS: ES-CRISP was characterized as a negative regulator of the angiogenesis, by direct interaction with endothelial cells. GENERAL SIGNIFICANCE: The presented work may lead to the development of novel angiostatic therapy, as well as contribute to the identification of the physiological relevance of this functionally uncharacterized protein.
Lecht, Shimon Chiaverelli, Rachel A Gerstenhaber, Jonathan Calvete, Juan J Lazarovici, Philip Casewell, Nicholas R Harrison, Robert Lelkes, Peter I Marcinkiewicz, Cezary R01CA100145/CA/NCI NIH HHS/United States R01CA133262/CA/NCI NIH HHS/United States Research Support, N.I.H., Extramural Netherlands Biochim Biophys Acta. 2015 Jun;1850(6):1169-79. doi: 10.1016/j.bbagen.2015.02.002. Epub 2015 Feb 7.