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Chromogranin A and the Endothelial Barrier Function

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Abstract:

Chromogranin A (CgA) is an acidic glycoprotein belonging to a family of regulated secretory proteins stored in the dense core granules of many neuroendocrine cells and neurons. This protein is produced, in certain conditions also by cardiomyocytes, keratinocytes and granulocytes. Upon secretion CgA is released in the extracellular environment and then in circulation. Increased levels of circulating CgA have been detected in patients with cancer, heart failure, hypertension, atrophic gastritis, renal failure, giant cell artheritis, rheumatoid arthritis, sepsis and other inflammatory diseases. Endothelial cells, either those located in the close proximity of secretory cells or in distant tissues, may be exposed, therefore, to variable levels of CgA. In this review we discuss recent findings that implicate CgA and its fragments as a modulators of the physiology of endothelial cells in normal and in pathological conditions. In particular, we review data that suggest that CgA and its N-terminal fragment, called vasostatin-1, are important modulators of the endothelial barrier function and potent inhibitors of the endothelial cell activation caused by inflammatory and pro-angiogenic cytokines, with potential implications in angiogenesis, inflammation and cancer.

Keywords: Chromogranin A; NGR-TNF; TNF; VE-cadherin; VEGF; angiogenesis; cancer; endothelial barrier function; endothelial cell; neuroendocrine tumors; vascular leakage; vasostatin-1

Document Type: Research Article

DOI: http://dx.doi.org/10.2174/092986712802429975

Publication date: August 1, 2012

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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