Intracellular Reverse Transcription of Pfizer BioNTech COVID-19 mRNA Vaccine BNT162b2 In Vitro in Human Liver Cell Line.

Intracellular Reverse Transcription of Pfizer BioNTech COVID-19 mRNA Vaccine BNT162b2 In Vitro in Human Liver Cell Line.
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DOI:
10.3390/cimb44030073
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发表时间:
2022-02-25
影响因子:
3.1
通讯作者:
De Marinis Y
De Marinis Y
中科院分区:
生物学4区
文献类型:
--
作者:
Aldén M;Olofsson Falla F;Yang D;Barghouth M;Luan C;Rasmussen M;De Marinis Y

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辉瑞和 BioNTech 开发的 COVID-19 mRNA 疫苗 BNT162b2 的临床前研究显示,接受 BNT162b2 注射的动物体内存在可逆的肝脏影响。此外,最近的一项研究表明,SARS-CoV-2 RNA可以逆转录并整合到人类细胞的基因组中。在本研究中,我们在体外研究了 BNT162b2 对人肝细胞系 Huh7 的影响。将Huh7细胞暴露于BNT162b2,并对从细胞中提取的RNA进行定量PCR。我们在 Huh7 细胞中检测到高水平的 BNT162b2 以及长散布核元件 1 (LINE-1)(一种内源性逆转录酶)基因表达的变化。在用 BNT162b2 处理的 Huh7 细胞上,使用与 LINE-1 开放阅读框-1 RNA 结合蛋白 (ORFp1) 结合的抗体进行免疫组织化学分析,结果表明 LINE-1 的细胞核分布增加。对暴露于 BNT162b2 的 Huh7 细胞的基因组 DNA 进行 PCR 扩增,扩增了 BNT162b2 特有的 DNA 序列。我们的结果表明 BNT162b2 快速摄取到人肝细胞系 Huh7 中,导致 LINE-1 表达和分布发生变化。我们还表明,BNT162b2 暴露后,BNT162b2 mRNA 在细胞内以最快 6 小时的速度逆转录为 DNA。
Preclinical studies of COVID-19 mRNA vaccine BNT162b2, developed by Pfizer and BioNTech, showed reversible hepatic effects in animals that received the BNT162b2 injection. Furthermore, a recent study showed that SARS-CoV-2 RNA can be reverse-transcribed and integrated into the genome of human cells. In this study, we investigated the effect of BNT162b2 on the human liver cell line Huh7 in vitro. Huh7 cells were exposed to BNT162b2, and quantitative PCR was performed on RNA extracted from the cells. We detected high levels of BNT162b2 in Huh7 cells and changes in gene expression of long interspersed nuclear element-1 (LINE-1), which is an endogenous reverse transcriptase. Immunohistochemistry using antibody binding to LINE-1 open reading frame-1 RNA-binding protein (ORFp1) on Huh7 cells treated with BNT162b2 indicated increased nucleus distribution of LINE-1. PCR on genomic DNA of Huh7 cells exposed to BNT162b2 amplified the DNA sequence unique to BNT162b2. Our results indicate a fast up-take of BNT162b2 into human liver cell line Huh7, leading to changes in LINE-1 expression and distribution. We also show that BNT162b2 mRNA is reverse transcribed intracellularly into DNA in as fast as 6 h upon BNT162b2 exposure.
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