CHGA (chromogranin A) is a granin family acidic glycoprotein. It resides in endocrine and neuroendocrine cells, where it is localized to secretory dense-core granules which store peptide hormones. It is a predominant protein of the chromaffin cell secretory granules.
Inmunógeno
synthetic peptide corresponding to the GR-44 peptide in the C-terminal region of human Chromogranin-A , conjugated to KLH.
Aplicación
Anti-Chromogranin A antibody produced in rabbit has been used in immunohistochemistry.
Acciones bioquímicas o fisiológicas
CHGA (chromogranin A) is secreted in abnormal levels by neoplastic neuroendocrine cells, which might be linked with tumor growth and progression, as it might influence the different components of tumor stroma. It is a highly sensitive and specific biomarker for the diagnosis of NETs (neuroendocrine tumors). CHGA is processed to produce catestatin (CST), vasostatin-I, serpinin and pancreastatin (PST), which function as metabolic or cardiovascular-regulatory peptides. As this protein is co-stored and co-released with catecholamines, it plays an essential role in production of catecholamine storage vesicles. It functions as a circulating biomarker for gastroenteropancreatic neuroendocrine neoplasm (GEP-NEN) patients.
Forma física
Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.
Cláusula de descargo de responsabilidad
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Nonfunctioning pancreatic neuroendocrine carcinoma (NPNEC) is a poorly differentiated neuroendocrine carcinoma and a rare type of pancreatic cancer. Computed tomography (CT)-based imaging is currently the most effective method for diagnosing and classifying NPNEC. The present study investigated the clinical features
Diagnostic value of circulating chromogranin a for neuroendocrine tumors: a systematic review and meta-analysis.
Yang X et al
PLoS ONE, 10(4), e0124884-e0124884 (2015)
A common genetic variant of the chromogranin A-derived peptide catestatin is associated with atherogenesis and hypertension in a Japanese population.
Choi Y et al
Endocrine Journal, 62(9), 797-804 (2015)
A comparison of three chromogranin A assays in patients with neuroendocrine tumours.
Hoej LB et al
Journal of Gastrointestinal and Liver Diseases : JGLD, 23(4), 419-424 (2014)
Chromogranin A as a marker for diagnosis, treatment, and survival in patients with gastroenteropancreatic neuroendocrine neoplasm.
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