mRNA in blood after 28 days, mRNA sequencing
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SARS-CoV-2 spike mRNA vaccine sequences circulate in blood up to 28 days after COVID-19 vaccination
https://onlinelibrary.wiley.com/doi/1...
Journal of Pathology, Microbiology and Immunology - the APMIS journal
Copenhagen University Hospital
CONFLICT OF INTEREST
Authors have no conflicts of interest to declare.
Denmark used
Pfizer-BioNTech (BTN162b2)
Moderna (mRNA-1273)
Both code for production of the full-length SARS-CoV-2 spike protein
mRNA is encapsulated in lipid nanoparticles
Non replicating
The modified nucleotide sequences allow perfect identification of the vaccine sequences
Patients with chronic hepatitis C virus (HCV) infection
Received mRNA vaccinations
To monitor HCV infection, RNA was extracted from patient plasma
In 10 of 108 HCV patient samples,
full-length or traces of SARS-CoV-2 spike mRNA vaccine sequences were found in blood,
up to 28 days after COVID-19 vaccination.
Professor Hoiby
https://studio.youtube.com/video/hkop...
INTRODUCTION
Upon intramuscular injection,
the vaccine mRNA is taken up by muscle and immune cells,
and transported to the regional lymph nodes,
and concentrated in the spleen
The vaccines consist of nonreplicating mRNA,
expected to naturally decompose,
both within the cytosol after translation and at the injection site.
Half-life of mRNA translation,
estimated from hours to a day.
Translation is described to span up to 10 days
The Infectious Diseases Society of America (IDSA)
https://www.idsociety.org/covid-19-re...
Vaccine mRNA is degraded quickly,
by normal intracellular processes,
there is no evidence for long-term detection of mRNA vaccines
Method used in Denmark
Genotyping whole RNA genome sequencing
NCH and SARS-CoV-2 mRNA,
directly from plasma samples
We describe the unexpected finding of SARS-CoV-2 vaccine mRNA sequences
Five consecutive sequencing runs
(May 2021 to the end of June 2021)
Five negative controls and five HCV-positive controls
RESULTS
Both mRNA vaccine sequences have been modified and are only ~70% identical to the spike reference genome on a nucleotide level,
making them distinct from circulating infectious SARS-CoV-2 sequences.
Of the 108 patient samples,
10 samples (9.3%) had partial or up to full sequences of the vaccine mRNA sequence
DISCUSSION
Analysis of mRNA vaccine function has focused on the immune response,
and on protection of vaccinated individuals
The LNPs have been reported to be rapidly cleared by immune cells,
and mRNA rapidly degraded
We expect that vaccine mRNA detected in plasma is contained within LNPs
To our knowledge, our study is the first to detect Pfizer-BioNTech and Moderna COVID-19 mRNA vaccine sequences in blood after vaccination,
and therefore provides new knowledge regarding the timeframe in which the mRNA can be detected.
A future prospective study to establish the half-life of mRNA vaccines in vaccine recipients could be performed
(using mRNA vaccine-specific PCRs)
Orignal video link https://youtube.com/watch?v=fWVxVd6IGgg&feature=shares
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