A novel microRNA promotes coxsackievirus B4 infection of pancreatic β cells.

The epidemiological association of coxsackievirus B infection with type 1 diabetes suggests that therapeutic strategies that reduce viral load could delay or prevent disease onset. Moreover, recent studies suggest that treatment with antiviral agents against coxsackievirus B may help preserve insulin levels in type 1 diabetic patients. In the current study, we performed small RNA-sequencing to show that infection of immortalized trophoblast cells with coxsackievirus caused differential regulation of several miRNAs.

Enterovirus Antibodies: Friends and Foes.

Enteroviruses (EV) initiate replication by binding to their cellular receptors, leading to the uncoating and release of the viral genome into the cytosol of the host cell. Neutralising antibodies (NAbs) binding to epitopes on enteroviral capsid proteins can inhibit this infectious process through several mechanisms of neutralisation in vitro. Fc-mediated antibody effector functions such as antibody-dependent cell-mediated cytotoxicity and antibody-dependent cellular phagocytosis have also been described for some EV.

Macrophages can transmit coxsackievirus B4 to pancreatic cells and can impair these cells.

Macrophages are suspected to be involved in the pathogenesis of type 1 diabetes. The role of macrophages in the transmission of coxsackievirus B4 (CVB4) to pancreatic cells and in the alteration of these cells was investigated. Human monocytes isolated from peripheral blood were differentiated into macrophages with M-CSF (M-CSF macrophages) or GM-CSF (GM-CSF macrophages).

Nanoparticles with a Lipid Core Can Enhance the Infection of Epithelial Cells with an Enterovirus.

Introduction: The effect of maltodextrin-based nanoparticles with an anionic phospholipid core (lipid-based nanoparticles [NPLs]) on the infection of a human tumoral cell line with poliovirus (PV) has been studied.

Methods: NPLs were synthesized and associated with the PV type 1 Sabin strain, and the formulations were characterized. PV and PV/NPL formulations were inoculated to HEp-2 cells.

The relationship between SARS-CoV-2 infection and type 1 diabetes mellitus.

Environmental factors, in particular viral infections, are thought to have an important role in the pathogenesis of type 1 diabetes mellitus (T1DM). The COVID-19 pandemic reinforced this hypothesis as many observational studies and meta-analyses reported a notable increase in the incidence of T1DM following infection with SARS-CoV-2 as well as an association between SARS-CoV-2 infection and the risk of new-onset T1DM. Experimental evidence suggests that human β-cells express SARS-CoV-2 receptors and that SARS-CoV-2 can infect and replicate in β-cells, resulting in structural or functional alterations of these cells.