NorCal Dave
Senior Member.
From the comments noted (bold by me):why does your 3rd paper say (in bold orange at top of page)? did you click that to read the comment?
www.mdpi.com/1467-3045/44/4/113/htmExternal Quote:Aldén et al. (2022) recently reported the intracellular reverse transcription of Pfizer BioNTech COVID-19 mRNA Vaccine BNT162b2 in vitro in a human liver cell line (Huh7) [1] that has raised significant concerns over the consequential genotoxicity among mRNA-vaccinated subjects.
The novel COVID-19 vaccines have been subject to several controversies since the beginning, and concerns over their potential to be incorporated into the human genome or alter human DNA (genotoxicity) have been a major public concern, also exploited by anti-vaccine campaigners, and have significantly affected vaccine uptake and corroborated to vaccine hesitancy globally. This article explains reasons as to why such a phenomenon, demonstrated recently in vitro, may not manifest clinically in vivo and therefore cannot be generalised to the healthy population.
First, although Huh7 responds to INF stimulation and is a promising cell line for studying viral infection and replication in vitro [2], it does not reflect an in vivo environment, particularly the absence of comprehensive cellular and humoral immune response. The experimental model employed by Aldén et al. [1] is scientifically incompetent to evaluate the genotoxicity of mRNA therapeutics, including BNT162b2 COVID-19 vaccines. The vaccine distribution beyond the injection site and consequent transfection to hepatocytes, albeit a possibility [3,4], will result in the translation of the mRNA into spike proteins that will attract an immune response towards vaccine-transfected hepatocytes. In the majority of cases, a healthy immune response, mediated by cytotoxic T cells and anti-spike antibodies, will eventually clear off vaccine-transfected hepatocytes; therefore, the reverse transcription of mRNA may not be a reality in vivo.
So at least this guy disagrees. My younger son is a grad student in phama-chem and speaks often of compounds that are successfully tested in "lab livers", only to have it not work in rats. I'll see if I can get him to look at this this eveing.