Skin-Type-Dependent Development of Murine Mechanosensory Neurons

The study explores the development of mechanosensory neurons in mice, focusing on how these neurons form distinct end-organs in glabrous (non-hairy) and hairy skin. It was found that mechanoreceptor morphologies are initially similar during early development but diverge post-natally as the skin matures. Neurons innervating glabrous skin form Meissner corpuscles, while those in hairy skin form lanceolate endings. The study emphasizes the role of bone morphogenetic proteins (BMP5 and BMP7) in glabrous skin, which are crucial for the formation of Meissner corpuscles. The findings suggest that skin-type-specific cues guide the morphological development of mechanosensory neurons, allowing them to adapt to the skin type they innervate. Understanding these processes could provide insights into sensory neuron pathologies and potential regenerative therapies.