A mouse model for Meckel syndrome reveals Mks1 is required for ciliogenesis and Hedgehog signaling Journal Article
| Authors: | Weatherbee, S. D.; Niswander, L. A.; Anderson, K. V. |
| Article Title: | A mouse model for Meckel syndrome reveals Mks1 is required for ciliogenesis and Hedgehog signaling |
| Abstract: | Meckel syndrome (MKS) is a rare autosomal recessive disease causing perinatal lethality associated with a complex syndrome that includes occipital meningoencephalocele, hepatic biliary ductal plate malformation, postaxial polydactyly and polycystic kidneys. The gene mutated in type 1 MKS encodes a protein associated with the base of the cilium in vertebrates and nematodes. However, shRNA knockdown studies in cell culture have reported conflicting results on the role of Mks1 in ciliogenesis. Here we show that loss of function of mouse Mks1 results in an accurate model of human MKS, with structural abnormalities in the neural tube, biliary duct, limb patterning, bone development and the kidney that mirror the human syndrome. In contrast to cell culture studies, loss of Mks1 in vivo does not interfere with apical localization of epithelial basal bodies but rather leads to defective cilia formation in most, but not all, tissues. Analysis of patterning in the neural tube and the limb demonstrates altered Hedgehog (Hh) pathway signaling underlies some MKS defects, although both tissues show an expansion of the domain of response to Shh signaling, unlike the phenotypes seen in other mutants with cilia loss. Other defects in the skull, lung, rib cage and long bones are likely to be the result of the disruption of Hh signaling, and the basis of defects in the liver and kidney require further analysis. Thus the disruption of Hh signaling can explain many, but not all, of the defects caused by loss of Mks1. © The Author 2009. Published by Oxford University Press. All rights reserved. |
| Keywords: | signal transduction; controlled study; unclassified drug; gene mutation; pathogenesis; nonhuman; proteins; animal cell; mouse; phenotype; animals; mice; animal tissue; sonic hedgehog protein; animal experiment; animal model; hedgehog proteins; gene product; embryo pattern formation; gene function; mice, inbred c57bl; vertebrata; disease model; cell culture; gene disruption; abnormalities, multiple; disease models, animal; erinaceidae; vertebrate; nematoda; eukaryotic flagellum; cilia; short hairpin rna; gene knockdown techniques; perinatal death; protein mks 1; autosomal recessive disorder; bile duct malformation; bone malformation; encephalomeningocele; kidney polycystic disease; limb malformation; meckel syndrome; nematode; neural tube defect; polydactyly; mice, inbred c3h |
| Journal Title: | Human Molecular Genetics |
| Volume: | 18 |
| Issue: | 23 |
| ISSN: | 0964-6906 |
| Publisher: | Oxford University Press |
| Date Published: | 2009-01-01 |
| Start Page: | 4565 |
| End Page: | 4575 |
| Language: | English |
| DOI: | 10.1093/hmg/ddp422 |
| PUBMED: | 19776033 |
| PROVIDER: | scopus |
| PMCID: | PMC2773271 |
| DOI/URL: | |
| Notes: | --- - "Cited By (since 1996): 7" - "Export Date: 30 November 2010" - "CODEN: HMGEE" - "Source: Scopus" |
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