Twist Controls Skeletal Development and Dorsoventral Patterning by Regulating Runx2 in Zebrafish

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2011 Nov 17

PMID 22087291

Citations 15

Authors

Der-Chih Yang

Chih-Chien Tsai

Yun-Feng Liao

Hui-Chuan Fu

Huey-Jen Tsay

Tung-Fu Huang

Yau-Hung Chen

Shih-Chieh Hung

Affiliations

Soon will be listed here.

Abstract

Background: Twist1a and twist1b are the principal components of twists that negatively regulate a number of cellular signaling events. Expression of runx2 and downstream targets is essential for skeletal development and ventral organizer formation and specification in early vertebrate embryos, but what controls ventral activity of maternal runx2 and how twists function in zebrafish embryogenesis still remain unclear.

Methodology/principal Findings: By studying the loss of twist induced by injection of morpholino-oligonucleotide in zebrafish, we found that twist1a and twist1b, but not twist2 or twist3, were required for proper skeletal development and dorsoventral patterning in early embryos. Overexpression of twist1a or twist1b following mRNA injection resulted in deteriorated skeletal development and formation of typical dorsalized embryos, whereas knockdown of twist1a and twist1b led to the formation of abnormal embryos with enhanced skeletal formation and typical ventralized patterning. Overexpression of twist1a or twist1b decreased the expression of runx2b, whereas twist1a and twist1b knockdown increased runx2b expression. We have further demonstrated that phenotypes induced by twist1a and twist1b knockdown were rescued by runx2b knockdown.

Conclusions/significance: Together, these results suggest that twist1a and twist1b control skeletal development and dorsoventral patterning by regulating runx2b in zebrafish and provide potential targets for the treatment of diseases or syndromes associated with decreased skeletal development.

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