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- W2045007465 abstract "Abstract Oligophrenin‐1 is a RhoGTPase‐activating protein (RhoGAP) that is involved in the regulation of shape changes in dendritic spines, and outgrowth of axons and dendrites in the brain. These changes in neuronal morphology are central to the mechanisms of plasticity, learning, and memory. Although the enteric nervous system also exhibits long‐term changes in neuronal function, the expression and involvement of oligophrenin‐1 has not previously been investigated. We show by RT‐PCR analysis that oligophrenin‐1 mRNA is expressed in the myenteric plexus (MP) of the guinea pig ileum. Sequencing of RT‐PCR products showed that guinea pig oligophrenin‐1 mRNA is 98% and 87% homologous to human and mouse oligophrenin‐1, respectively, except that a 42 bp sequence is absent from the guinea pig mRNA. This 42 bp sequence codes for a sequence of 14 amino acids located near the carboxy‐terminal end of the RhoGAP domain in the human sequence. An antibody that recognizes human oligophrenin‐1 identified a 91 kDa protein band in rat and mouse brain lysates and in guinea pig sciatic nerve, and a 36 kDa protein band in both purified enteric ganglion cell and brain lysate from guinea pig. Oligophrenin‐1 is localized specifically to neurons and varicose axons in the MPs and submucosal plexuses (SMPs) of the guinea pig and rat, but is not detectable in glial cells, smooth muscle, or other cell types. These findings indicate that oligophrenin‐1 is expressed in the enteric nervous system, where it may regulate morphological changes in axons and dendrites, and thus modulate neuronal connectivity. Anat Rec Part A 273A:671–676, 2003. © 2003 Wiley‐Liss, Inc." @default.
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- W2045007465 date "2003-06-26" @default.
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- W2045007465 title "Oligophrenin‐1, a Rho GTPase‐activating protein (RhoGAP) involved in X‐linked mental retardation, is expressed in the enteric nervous system" @default.
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- W2045007465 doi "https://doi.org/10.1002/ar.a.10072" @default.
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