Crossing the blood–brain barrier

My brain hurts To reach the central nervous system (CNS), pathogens have to circumvent the wall of tightly sealed endothelial cells that compose the blood–brain barrier. Neuronal projections that connect to peripheral cells and organs are the Achilles heels in CNS isolation. Some viruses and bacterial toxins interact with membrane receptors that are present at nerve terminals to enter the axoplasm. Pathogens can then be mistaken for cargo and recruit trafficking components, allowing them to undergo long-range axonal transport to neuronal cell bodies. This review highlights the strategies used by pathogens to exploit axonal transport during CNS invasion.

A hitchhiker’s guide to the nervous system: the complex journey of viruses and toxins. 2010 Nature Reviews Microbiology 8: 645-655 doi:10.1038/nrmicro2395

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