Cadherins M, 11, and 6 expression patterns suggest complementary roles in mouse neuromuscular axis development.
As the result of a systematic search for cell adhesion molecules of the cadherin family expressed in the developing mouse neuromuscular system, we obtained cDNAs coding for eight molecules of the family, including cadherins M, 11, and 6. Northern blot and in situ hybridization analysis in the mouse embryo revealed a complementary expression of these transcripts. M-cadherin is found in embryonic somitic and nonsomitic striated muscles. As far as the hypaxial musculature is concerned, M-cadherin is expressed in committed but not in migratory precursor cells. Cadherin-11 is detected in mesodermal and conjunctive tissues and transiently in the ependymal germinative layer and in the motoneuron columns of the spinal cord. Cadherin-6 is found in embryonic spinal motoneuron columns and in Schwann cell precursors. In vitro experiments confirmed the muscular, glial, and fibroblastic origins of cadherins M, 11, and 6 transcripts, respectively. Altogether, these results suggest that various cadherins are differentially involved in muscle cell, Schwann cell, and motoneuron interactions and differentiation during neuromuscular development.
Padilla
F
F
Signalisation et Différenciation Cellulaires dans les Systèmes Nerveux et Musculaire, Institut du Fer à Moulin, 17 rue du Fer à Moulin, Paris, 75005, USA.
Broders
F
F
Nicolet
M
M
Mege
R M
RM
D000818:Animals; D000831:Animals, Newborn; D000870:Anterior Horn Cells / Q000378:metabolism; D015820:Cadherins / Q000096:biosynthesis* / Q000235:genetics; D002478:Cells, Cultured; D018076:DNA, Complementary / Q000235:genetics; D004268:DNA-Binding Proteins / Q000378:metabolism; D005121:Extremities / Q000196:embryology; D005326:Fetal Proteins / Q000096:biosynthesis* / Q000235:genetics; D005347:Fibroblasts / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D017403:In Situ Hybridization; D008648:Mesoderm / Q000378:metabolism; D051379:Mice; D008815:Mice, Inbred Strains; D024510:Muscle Development; D009124:Muscle Proteins / Q000096:biosynthesis* / Q000235:genetics; D018482:Muscle, Skeletal / Q000196:embryology / Q000254:growth & development / Q000378:metabolism*; D009419:Nerve Tissue Proteins / Q000096:biosynthesis / Q000235:genetics; D009457:Neuroglia / Q000378:metabolism; D009928:Organ Specificity; D000072041:PAX3 Transcription Factor; D051761:Paired Box Transcription Factors; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000096:biosynthesis; D051381:Rats; D012583:Schwann Cells / Q000378:metabolism; D019170:Somites / Q000378:metabolism*; D013116:Spinal Cord / Q000196:embryology / Q000254:growth & development / Q000378:metabolism*; D014157:Transcription Factors; D014781:Viscera / Q000254:growth & development / Q000378:metabolism
D015820:Cadherins; D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D005326:Fetal Proteins; D009124:Muscle Proteins; D009419:Nerve Tissue Proteins; D000072041:PAX3 Transcription Factor; D051761:Paired Box Transcription Factors; D012333:RNA, Messenger; D014157:Transcription Factors; C068686:Pax3 protein, mouse; C070896:M-cadherin; C086960:osteoblast cadherin; C087310:K cadherin