AbstractCoronavirus disease-19 (COVID-19) mRNA vaccines are the mainstays of mass vaccination campaigns in most Western countries. However, the emergency conditions in which their development took place made it impossible to fully characterize their effects and mechanism of action. Here, we summarize and discuss available evidence indicating that COVID-19 mRNA vaccines better reflect pharmaceutical drugs than …
Tag: spike
Persistent varicella zoster virus infection following mRNA COVID-19 vaccination was associated with the presence of encoded spike protein in the lesion
BackgroundSince the campaign of vaccination against COVID-19 was started, a wide variety of cutaneous adverse effects after vaccination has been documented worldwide. Varicella zoster virus (VZV) reactivation was reportedly the most frequent cutaneous reaction in men after administration of mRNA COVID-19 vaccines, especially BNT162b2.AimsA patient, who had persistent skin lesions after BNT162b2 vaccination for such …
Intramyocardial Inflammation after COVID-19 Vaccination: An Endomyocardial Biopsy-Proven Case Series
Myocarditis in response to COVID-19 vaccination has been reported since early 2021. In particular, young male individuals have been identified to exhibit an increased risk of myocardial inflammation following the administration of mRNA-based vaccines. Even though the first epidemiological analyses and numerous case reports investigated potential relationships, endomyocardial biopsy (EMB)-proven cases are limited. Here, we …
Quantitative assays reveal cell fusion at minimal levels of SARS-CoV-2 spike protein and fusion from without
Highlights•Minimal levels of SARS-CoV-2 spike protein can cause cell fusion •Spike protein displayed on virus-like particles induces fusion from without •Particle-cell fusion is more sensitive toward neutralization than cell-cell fusion •Highly sensitive and scalable membrane fusion assays are applicable at BSL-1 Cell entry of the pandemic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is mediated …
SARS-CoV-2 #Spike Protein Impairs #Endothelial Function via Downregulation of ACE 2
... SARS-CoV-2 infection induces EC inflammation, leading to endotheliitis.1,5 Because S protein decreased ACE2 level and impaired NO bioavailability, we examined whether S protein entry is indispensable for dysfunctional endothelium. As shown in Figure [F], i, the endothelium-dependent vasodilation induced by acetylcholine was impaired in pulmonary arteries isolated from Pseu-Spike-administered hamsters, whereas the endothelium-independent vasodilation …
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