Abstract
The leprosy pathogen Mycobacterium leprae attacks Schwann cells in the peripheral nervous system, causing them to demyelinate. Recent work by Tapinos et al. shows that a direct mechanism of demyelination induced by M. leprae depends on the binding of the bacterium to the receptor tyrosine kinase ErbB2 on Schwann cells and the resulting activation of the Ras-Raf-MEK-ERK pathway. These findings have relevance for the potential treatment of leprosy and they highlight parallels between the dedifferentiation signal in leprosy and that in nerve injury and cancer.
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