eLife Assessment
The authors develop an important microfluidic microvascular model called "Vessel-on-Chip", which they use to study Neisseria meningitidis interactions within this in vitro vascular system. Compelling evidence shows that the fabricated channels are lined by endothelial cells, and these can be colonized by N. meningitidis that in turn triggers neutrophil recruitment. This model has advantages over the human skin xenograft mouse model, which requires complex surgical techniques, however, it also carries limitations in that only endothelial cells and supplied specific immune cells in the microfluidics are present, while true vasculature contains a number of other cell types including smooth muscle cells, pericytes, and components of the immune system.
[Editors' note: this paper was reviewed by Review Commons.]