Cell autonomy of the mouse claw paw mutation

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Darbas, Aysel ; Jaegle, Martine ; Walbeehm, Erik ; van den Burg, Hans ; Driegen, Siska ; Broos, Ludo ; Uyl, Matthijs ; Visser, Pim ; Grosveld, Frank ; Meijer, Dies (2004)
  • Publisher: Elsevier BV
  • Journal: Developmental Biology, volume 272, issue 2, pages 470-482 (issn: 0012-1606)
  • Related identifiers: doi: 10.1016/j.ydbio.2004.05.017
  • Subject: Molecular Biology | Cell Biology | Developmental Biology
    mesheuropmc: digestive system | nervous system | bacterial infections and mycoses | stomatognathic diseases | animal diseases

textabstractMice homozygous for the autosomal recessive mutation claw paw (clp) are characterized by limb posture abnormalities and congenital hypomyelination, with delayed onset of myelination of the peripheral nervous system but not the central nervous system. Although this combination of limb and peripheral nerve abnormalities in clp/clp mice might suggest a common neurogenic origin of the syndrome, it is not clear whether the clp gene acts primarily in the neurone, the Schwann cell or both. In the work described here, we address this question of cell autonomy of the clp mutation through reciprocal nerve grafting experiments between wild-type and clp/clp animals. Our results demonstrate that the clp mutation affects the Schwann cell compartment and possibly also the neuronal compartment. These data suggest that the clp gene product is expressed in Schwann cells as well as neurones and is likely to be involved in direct axon--Schwann cell interactions. Within the Schwann cell, clp affects a myelin-related signaling pathway that regulates periaxin and Krox-20 expression, but not Oct-6.
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