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Mech Dev. 2014 May;132:28-37. doi: 10.1016/j.mod.2014.02.001. Epub 2014 Feb 12.

RFX7 is required for the formation of cilia in the neural tube.

Author information

1
Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32306, USA.
2
Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32306, USA. Electronic address: branko.stefanovic@med.fsu.edu.
3
Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32306, USA. Electronic address: yoichi.kato@med.fsu.edu.

Abstract

Regulatory Factor X (RFX) transcription factors are important for development and are likely involved in the pathogenesis of serious human diseases including ciliopathies. While seven RFX genes have been identified in vertebrates and several RFX transcription factors have been reported to be regulators of ciliogenesis, the role of RFX7 in development including ciliogenesis is not known. Here we show that RFX7 in Xenopus laevis is expressed in the neural tube, eye, otic vesicles, and somites. Knockdown of RFX7 in Xenopus embryos resulted in a defect of ciliogenesis in the neural tube and failure of neural tube closure. RFX7 controlled the formation of cilia by regulating the expression of RFX4 gene, which has been reported to be required for ciliogenesis in the neural tube. Moreover, ectopic expression of Foxj1, which is a master regulator of motile cilia formation, suppressed the expression of RFX4 but not RFX7. Taken together, RFX7 plays an important role in the process of neural tube closure at the top of the molecular cascade which controls ciliogenesis in the neural tube.

KEYWORDS:

Cilia; Neural tube closure; RFX; Xenopus laevis

PMID:
24530844
PMCID:
PMC3976564
DOI:
10.1016/j.mod.2014.02.001
[Indexed for MEDLINE]
Free PMC Article

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