Detecting sars-cov-2 orf3a and e ion channel activity in covid-19 blood samples
Circulation
; 144(SUPPL 1), 2021.
Article
in English
| EMBASE | ID: covidwho-1639369
ABSTRACT
Introduction:
SARS-CoV-2 has been found in the heart of COVID-19 patients. It is unclear how the virus passes from the upper respiratory tract to the myocardium.Hypothesis:
SARS-CoV-2 is present in the blood of COVID-19 infected patients.Methods:
We targeted two viropotins, Orf3a and E, in SARS-CoV-2. Orf3a and E form non-voltagegated ion channels. A combined fluorescence potassium ion assay with three channel modulators (4-aminopyridine, emodin-Orf3a channel blocker, gliclazide-E channel blocker) was developed to detect SARS-CoV-2 Orf3a/E channel activity. In blood samples, we subtracted the fluorescence signals in the absence and presence of emodin/gliclazide to detect Orf3a and E channel activity.Results:
In lentivirus spiked samples, we detected significant channel activity of Orf3a/E based on increase in fluorescence induced by 4-aminopyridine, and this increase in fluorescence was inhibited by emodin and gliclazide. In 18 antigen/PCR positive samples, our test results found 15 are positive, demonstrating 83.3% concordance. In 24 antigen/PCR negative samples, our test results found 21 are negative, showing 87.5% concordance.Conclusions:
We developed a cell-free, rapid, and high-throughput test that can detect Orf3a/E channel activity of SARS-CoV-2 in blood samples from COVID-19 infected individuals, which provides a likely explanation that the virus spreads to the heart via blood circulation.
antigen; emodin; endogenous, compound; fampridine; gliclazide; ion, channel; potassium, ion; adult; blood, sampling; circulation; conference, abstract; controlled, study; fluorescence; heart; human; human, tissue; Lentivirus; nonhuman; polymerase, chain, reaction; protein, function; Severe, acute, respiratory, syndrome, coronavirus, 2
Full text:
Available
Collection:
Databases of international organizations
Database:
EMBASE
Language:
English
Journal:
Circulation
Year:
2021
Document Type:
Article
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