Chromogranin B in blood serum of patients with neuroendocrine tumors.

Autor:	Lyubimova NV; N.N. Blokhin National Medical Research Center of Oncology., Timofeev YS; N.N. Blokhin National Medical Research Center of Oncology., Markovich AA; N.N. Blokhin National Medical Research Center of Oncology., Lebedeva AV; N.N. Blokhin National Medical Research Center of Oncology., Karamisheva EI; N.N. Blokhin National Medical Research Center of Oncology., Delektorskaya VV; N.N. Blokhin National Medical Research Center of Oncology., Kushlinskii NE; N.N. Blokhin National Medical Research Center of Oncology.
Jazyk:	angličtina
Zdroj:	Klinicheskaia laboratornaia diagnostika [Klin Lab Diagn] 2022 Aug 15; Vol. 67 (8), pp. 440-443.
DOI:	10.51620/0869-2084-2022-67-8-440-443
Abstrakt:	Neuroendocrine tumors (NETs) are a heterogeneous group of neoplasms from cells of the diffuse neuroendocrine system. Chromogranin B (CgB) is an acidic protein of the granin family, which can be used to detect the tumours of neuroendocrine nature. Analysis of levels and evaluation of the diagnostic efficiency of CgB in the blood serum of patients with NETs of various localizations. Patients with NETs (n=121) without specific treatment were examined. In the study were presented next localizations: 74 - pancreas, 20 - stomach, 12 - large intestine, 15 - other localizations (lungs, mammary gland, prostate gland, NETs with unidentified primary). 54 practically healthy donors were examined as control group. The determination of CgB in blood serum was performed with ELISA method on BEP 2000 analyzer using a standardized test system Human Chromogranin B (USCN, China). CgB levels in common NET group (median 18.9 ng/mL) were statistically significantly higher than in the control group (8.8 ng/mL). The highest median was obtained in group of intestinal NETs (21.2 ng/ml), which exceeded the median of the control group by more than 2.4 times. According to ROC analysis in the common NET group relative to the control group, the area under the curve AUC was 0.88 (95% CI 0.83-0.929). According to cut-off level of CgB - 15.8 ng/ml, the diagnostic sensitivity was 69.4%, with a specificity of 96.3%. The highest diagnostic sensitivity was in the group of the intestinal NETs (75.0%) and pancreas (71.2%). The study showed the significance of CgB as a potential biochemical marker of NETs with various localizations, alternative to CgA. Competing Interests: The authors declare no conflict of interest.
Databáze:	MEDLINE
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