Centre for Functional Genomics and Bio-Chips, Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000 Ljubljana, Slovenia.
Biochim Biophys Acta Mol Cell Biol Lipids. 2021 Feb;1866(2):158849. doi: 10.1016/j.bbalip.2020.158849. Epub 2020 Nov 4.
Cholesterol is being recognized as a molecule involved in regulating the entry of the SARS-CoV-2 virus into the host cell. However, the data about the possible role of cholesterol carrying lipoproteins and their receptors in relation to infection are scarce and the connection of lipid-associated pathologies with COVID-19 disease is in its infancy. Herein we provide an overview of lipids and lipid metabolism in relation to COVID-19, with special attention on different forms of cholesterol. Cholesterol enriched lipid rafts represent a platform for viruses to enter the host cell by endocytosis. Generally, higher membrane cholesterol coincides with higher efficiency of COVID-19 entry. Inversely, patients with COVID-19 show lowered levels of blood cholesterol, high-density lipoproteins (HDL) and low-density lipoproteins. The modulated efficiency of viral entry can be explained by availability of SR-B1 receptor. HDL seems to have a variety of roles, from being itself a scavenger for viruses, an immune modulator and mediator of viral entry. Due to inverse roles of membrane cholesterol and lipoprotein cholesterol in COVID-19 infected patients, treatment of these patients with cholesterol lowering statins needs more attention. In conclusion, cholesterol and lipoproteins are potential markers for monitoring the viral infection status, while the lipid metabolic pathways and the composition of membranes could be targeted to selectively inhibit the life cycle of the virus as a basis for antiviral therapy.
胆固醇被认为是一种参与调节 SARS-CoV-2 病毒进入宿主细胞的分子。然而,关于胆固醇携带脂蛋白及其受体在感染中的可能作用的数据很少,脂质相关病理学与 COVID-19 疾病的联系还处于起步阶段。本文综述了与 COVID-19 相关的脂质和脂质代谢,特别关注不同形式的胆固醇。富含胆固醇的脂筏代表病毒通过内吞作用进入宿主细胞的平台。一般来说,较高的膜胆固醇与 COVID-19 进入的效率较高相一致。相反,COVID-19 患者的血液胆固醇、高密度脂蛋白 (HDL) 和低密度脂蛋白水平降低。病毒进入效率的调节可以用 SR-B1 受体的可用性来解释。HDL 似乎具有多种作用,它本身既是病毒的清除剂,又是免疫调节剂和病毒进入的介质。由于膜胆固醇和脂蛋白胆固醇在 COVID-19 感染患者中的作用相反,因此需要更多关注用降低胆固醇的他汀类药物治疗这些患者。总之,胆固醇和脂蛋白可能是监测病毒感染状态的潜在标志物,而脂质代谢途径和膜的组成可以作为抗病毒治疗的基础,针对病毒的生命周期进行选择性抑制。
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