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2’-Fucosyllactose Inhibits Coxsackievirus Class A Type 9 Infection by Blocking Virus Attachment and Internalisation
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2’-Fucosyllactose Inhibits Coxsackievirus Class A Type 9 Infection by Blocking Virus Attachment and Internalisation
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Journal Article
2’-Fucosyllactose Inhibits Coxsackievirus Class A Type 9 Infection by Blocking Virus Attachment and Internalisation
2022
Overview
Coxsackieviruses, a genus of enteroviruses in the small RNA virus family, cause fatal infectious diseases in humans. Thus far, there are no approved drugs to prevent these diseases. Human milk contains various biologically active components against pathogens. Currently, the potential activity of breast milk components against the coxsackievirus remains unclear. In our study, the inhibitory effect of 16 major human milk components was tested on coxsackievirus class A type 9 isolate (CV-A9), BUCT01; 2’-Fucosyllactose (2’-FL) was identified to be effective. Time-of-addition, attachment internalisation assays, and the addition of 2’-FL at different time points were applied to investigate its specific role in the viral life cycle. Molecular docking was used to predict 2’-FL’s specific cellular targets. The initial screening revealed a significant inhibitory effect (99.97%) against CV-A9 with 10 mg/mL 2’-FL, with no cytotoxicity observed. Compared with the control group, 2’-FL blocked virus entry (85%) as well as inhibited viral attachment (48.4%) and internalisation (51.3%), minimising its infection in rhabdomyosarcoma (RD) cells. The cell pre-incubation with 2’-FL exhibited significant inhibition (73.2–99.9%). Extended incubation between cells with 2’-FL reduced CV-A9 infection (93.9%), suggesting that 2’-FL predominantly targets cells to block infection. Molecular docking results revealed that 2’-FL interacted with the attachment receptor αvβ6 and the internalisation receptor FCGRT and β2M with an affinity of −2.14, −1.87, and −5.43 kcal/mol, respectively. This study lays the foundation for using 2’-FL as a food additive against CV-A9 infections.
Publisher
MDPI AG,MDPI
