The mRNA-LNP platform's lipid nanoparticle component used in preclinical vaccine studies is highly inflammatory.

The mRNA-LNP platform's lipid nanoparticle component used in preclinical vaccine studies is highly inflammatory.
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DOI:
10.1016/j.isci.2021.103479
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发表时间:
2021-12-17
期刊:
影响因子:
5.8
通讯作者:
Igyártó BZ
Igyártó BZ
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Ndeupen S;Qin Z;Jacobsen S;Bouteau A;Estanbouli H;Igyártó BZ

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基于含有 mRNA 的脂质纳米颗粒 (LNP) 的疫苗是一种有前景的新平台,已被两种领先的 COVID-19 疫苗所使用。临床试验和正在进行的疫苗接种存在不同程度的保护水平和副作用。然而,所报告的副作用的驱动因素仍然不明确。在这里,我们提供的证据表明,临床前核苷修饰 mRNA 疫苗研究中使用的 Acuitas 的 LNP 在小鼠体内具有高度炎症性。皮内和肌肉注射这些 LNP 会导致快速而强烈的炎症反应,其特征是大量中性粒细胞浸润,激活多种炎症途径,并产生各种炎症细胞因子和趋化因子。鼻内递送相同剂量的 LNP 会导致肺部相似的炎症反应,并导致高死亡率,但机制尚未解决。因此,mRNA-LNP 平台支持诱导适应性免疫反应的效力和观察到的副作用可能源于 LNP 的高度炎症性质。用于临床前研究的脂质纳米粒子 (LNP) 具有高度炎症性 LNP 激活多种炎症途径并诱导 IL-1β 和 IL-6 LNP 的炎症特性源于其可电离的脂质成分 LNP 可能是佐剂作用和一些副作用的原因免疫学;生物技术
Vaccines based on mRNA-containing lipid nanoparticles (LNPs) are a promising new platform used by two leading vaccines against COVID-19. Clinical trials and ongoing vaccinations present with varying degrees of protection levels and side effects. However, the drivers of the reported side effects remain poorly defined. Here we present evidence that Acuitas' LNPs used in preclinical nucleoside-modified mRNA vaccine studies are highly inflammatory in mice. Intradermal and intramuscular injection of these LNPs led to rapid and robust inflammatory responses, characterized by massive neutrophil infiltration, activation of diverse inflammatory pathways, and production of various inflammatory cytokines and chemokines. The same dose of LNP delivered intranasally led to similar inflammatory responses in the lung and resulted in a high mortality rate, with mechanism unresolved. Thus, the mRNA-LNP platforms' potency in supporting the induction of adaptive immune responses and the observed side effects may stem from the LNPs' highly inflammatory nature. Lipid nanoparticles (LNPs) used for preclinical studies are highly inflammatory The LNPs activate multiple inflammatory pathways and induce IL-1β and IL-6 The LNPs' inflammatory properties stem from their ionizable lipid component The LNPs could be responsible for adjuvanticity and some of the side effects Biological sciences; Immunology; Biotechnology
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