Early mesodermal phenotypes in Splotch suggest a role for Pax3 in the formation of epithelial somites

F R Schubert; P Tremblay; A Mansouri; A M Faisst; B Kammandel; A Lumsden; P Gruss; S Dietrich

doi:10.1002/dvdy.1211

Early mesodermal phenotypes in Splotch suggest a role for Pax3 in the formation of epithelial somites

F R Schubert, P Tremblay, A Mansouri, A M Faisst, B Kammandel, A Lumsden, P Gruss, S Dietrich

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Abstract

The paired box containing transcription factor Pax3 is a crucial regulator of dermomyotome and muscle development. However, the allelic series of Pax3/Splotch mutants also displays characteristic vertebral column malformations, which do not result from defective dorsoventral somite pattern. Rather, vertebral column and sclerotomal phenotypes are reminiscent of the phenotypes observed in the segmentation/somitogenesis mutants rachiterata and pudgy. Moreover, rostrocaudal somite pattern and somitic boundaries are disturbed in Splotch as monitored by the expression of Uncx4.1 and Lunatic fringe. Alterations in EphA4, Dll1, and Uncx4.1 expression are evident already in the condensing paraxial mesoderm, correlating with the first phase of Pax3 expression before and during somite formation. This finding suggests an early function of Pax3 during the formation of epithelial somites. (C) 2001 Wiley-Liss, Inc.

Original language	English
Pages (from-to)	506 - 521
Number of pages	16
Journal	Developmental Dynamics
Volume	222
Issue number	3
DOIs	https://doi.org/10.1002/dvdy.1211
Publication status	Published - 2001

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title = "Early mesodermal phenotypes in Splotch suggest a role for Pax3 in the formation of epithelial somites",

abstract = "The paired box containing transcription factor Pax3 is a crucial regulator of dermomyotome and muscle development. However, the allelic series of Pax3/Splotch mutants also displays characteristic vertebral column malformations, which do not result from defective dorsoventral somite pattern. Rather, vertebral column and sclerotomal phenotypes are reminiscent of the phenotypes observed in the segmentation/somitogenesis mutants rachiterata and pudgy. Moreover, rostrocaudal somite pattern and somitic boundaries are disturbed in Splotch as monitored by the expression of Uncx4.1 and Lunatic fringe. Alterations in EphA4, Dll1, and Uncx4.1 expression are evident already in the condensing paraxial mesoderm, correlating with the first phase of Pax3 expression before and during somite formation. This finding suggests an early function of Pax3 during the formation of epithelial somites. (C) 2001 Wiley-Liss, Inc.",

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T1 - Early mesodermal phenotypes in Splotch suggest a role for Pax3 in the formation of epithelial somites

AU - Schubert, F R

AU - Tremblay, P

AU - Mansouri, A

AU - Faisst, A M

AU - Kammandel, B

AU - Lumsden, A

AU - Gruss, P

AU - Dietrich, S

PY - 2001

Y1 - 2001

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AB - The paired box containing transcription factor Pax3 is a crucial regulator of dermomyotome and muscle development. However, the allelic series of Pax3/Splotch mutants also displays characteristic vertebral column malformations, which do not result from defective dorsoventral somite pattern. Rather, vertebral column and sclerotomal phenotypes are reminiscent of the phenotypes observed in the segmentation/somitogenesis mutants rachiterata and pudgy. Moreover, rostrocaudal somite pattern and somitic boundaries are disturbed in Splotch as monitored by the expression of Uncx4.1 and Lunatic fringe. Alterations in EphA4, Dll1, and Uncx4.1 expression are evident already in the condensing paraxial mesoderm, correlating with the first phase of Pax3 expression before and during somite formation. This finding suggests an early function of Pax3 during the formation of epithelial somites. (C) 2001 Wiley-Liss, Inc.

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Early mesodermal phenotypes in Splotch suggest a role for Pax3 in the formation of epithelial somites

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