title: Sonic Hedgehog Signaling and Hippocampal Neuroplasticity.
abstract: Sonic hedgehog (Shh) is a secreted protein that controls the patterning of neural progenitor cells, and their neuronal and glial progeny, during development. Emerging findings suggest that Shh also has important roles in the formation and plasticity of neuronal circuits in the hippocampus, a brain region of fundamental importance in learning and memory. Shh mediates activity-dependent and injury-induced hippocampal neurogenesis. Activation of Shh receptors in the dendrites of hippocampal neurons engages a trans-neuronal signaling pathway that accelerates axon outgrowth and enhances glutamate release from presynaptic terminals. Impaired Shh signaling may contribute to the pathogenesis of several developmental and adult-onset neurological disorders that affect the hippocampus, suggesting a potential for therapeutic interventions that target Shh pathways.
authors.affiliation: Laboratory of Neurosciences, National Institute on Aging, Intramural Research Program, Baltimore, MD 21224, USA. Electronic address: yaopa@grc.nia.nih.gov.
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Yao
authors.affiliation: Advanced Imaging Core, NIDCD, National Institutes of Health, Bethesda, MD 20892, USA.
authors.forename: Ronald S
authors.initials: RS
authors.lastname: Petralia
authors.affiliation: Laboratory of Neurosciences, National Institute on Aging, Intramural Research Program, Baltimore, MD 21224, USA; Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Electronic address: mark.mattson@nih.gov.
authors.forename: Mark P
authors.initials: MP
authors.lastname: Mattson
mesh_terms: D000818:Animals; D053823:Hedgehog Proteins / Q000378:metabolism*; D006624:Hippocampus / Q000378:metabolism*; D006801:Humans; D009473:Neuronal Plasticity / Q000502:physiology*; D015398:Signal Transduction
chemical_list: D053823:Hedgehog Proteins