Intra-laboratory validated “TigraTest® SARS-CoV-2” — test assessing release of interferon gamma in vitro to identify peripheral blood T-lymphocytes specifically responding against SARS-CoV-2 virus antigens
- 作者: Lyagoskin I.V.1, Kargopolova P.E.1, Obyedkov D.A.1, Egorova I.Y.1, Shukurov R.R.1
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隶属关系:
- JSC “GENERIUM”
- 期: 卷 12, 编号 4 (2022)
- 页面: 701-713
- 栏目: ORIGINAL ARTICLES
- URL: https://journals.rcsi.science/2220-7619/article/view/119080
- DOI: https://doi.org/10.15789/2220-7619-ILV-1855
- ID: 119080
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SARS-CoV-2 (Severe acute respiratory syndrome coronavirus 2), also known as 2019-nCoV (2019-Novel Coronavirus) is a strain of coronavirus from the genus Betacoronavirus, discovered in China at the end of 2019 in patients with pneumonia. “Coronavirus infection COVID-19” (COrona VIrus Disease 2019) caused by coronavirus 2019 (COVID-19) has spread around the world at a very fast pace, with death toll exceeding more than 5.2 million people worldwide. Limited success in developing new drugs as well as use of existing drugs for the treatment of COVID-19 resulted in situation when the main prevention measures for a long time were based on testing and isolation of sick subjects, which started to reverse due to vaccination. Monitoring the formation of humoral and T-cell population immunity against the SARS-CoV-2 virus during the COVID-19 pandemic is a necessary element for epidemiological surveillance. ELISA-based methods are widely used to assess humoral immunity, and various test systems including ELISPOT (Enzyme-Linked ImmunoSpot) are used to analyze cellular immunity. The ELISPOT assay is a highly sensitive and specific method for quantifying individual cytokine-secreting T cells after being stimulated with a specific antigen. “TigraTest® SARS-CoV-2” Test assessing release of interferon gamma in vitro to detect peripheral blood T-lymphocytes that specifically respond to the SARS-CoV-2 virus antigens manufactured by GENERIUM JSC, is created on the ELISPOT platform. This study describes the procedure for laboratory validation of this test system to analyze the following parameters: specificity of antibody pair, effect of interfering substances, sensitivity and specificity, precision, stability of blood samples till isolation of target cells. The developed test system showed high diagnostic sensitivity and specificity. The specificity of TigraTest® SARS-CoV-2 was 100%, the sensitivity for subjects immunized with the Gam-COVID-Vac vaccine (Sputnik V) was 91.67%, and the sensitivity in convalescent COVID-19 patients was 95.45%. At the same time, the data variability both during within and between series comparison did not exceed 25%, whereas 24-hour storage of peripheral blood samples at (18–25)°С after blood collection followed by isolation of target cells did not affect the test results.
作者简介
Ivan Lyagoskin
JSC “GENERIUM”
编辑信件的主要联系方式.
Email: lyagoskin@ibcgenerium.ru
ORCID iD: 0000-0002-9058-1106
PhD (Biology), Head of the Analytical Methods Division, Department of the Pharmaceutical Analysis
俄罗斯联邦, 14, Vladimirskaya str., poselok Volginsky, Petushinsky district, Vladimir Region, 601125Pauline Kargopolova
JSC “GENERIUM”
Email: peignatieva@ibcgenerium.ru
ORCID iD: 0000-0003-4132-5971
Analytical Chemist, Laboratory of Biological Methods, Analytical Methods Division, Department of the Pharmaceutical Analysis
俄罗斯联邦, Volginsky, Petushinsky District, Vladimir RegionDmitry Obyedkov
JSC “GENERIUM”
Email: daobedkov@generium.ru
ORCID iD: 0000-0002-8719-7795
Researcher, Laboratory of Biological Methods, Analytical Methods Division, Department of the Pharmaceutical Analysis
俄罗斯联邦, Volginsky, Petushinsky District, Vladimir RegionIrina Egorova
JSC “GENERIUM”
Email: iyegorova@generium.ru
ORCID iD: 0000-0001-7996-9321
PhD, MD (Veterinary), Associate Professor, Head of the Group of Diagnostic Test-Systems, Division of Molecular Diagnostics, Department of the Pharmaceutical Analysis
俄罗斯联邦, Volginsky, Petushinsky District, Vladimir RegionRahim Shukurov
JSC “GENERIUM”
Email: Shukurov@ibcgenerium.ru
ORCID iD: 0000-0002-6532-7835
PhD (Biology), Director of the Department of the Pharmaceutical Analysis
俄罗斯联邦, Volginsky, Petushinsky District, Vladimir Region参考
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