ZFIN ID: ZDB-PUB-161224-15
Osmotic and Heat Stress Effects on Segmentation
Weiss, J., Devoto, S.H.
Date: 2016
Source: PLoS One   11: e0168335 (Journal)
Registered Authors: Devoto, Stephen Henri
Keywords: Embryos, Osmotic shock, Somites, Morphogenic segmentation, Zebrafish, Endoplasmic reticulum, Hypoxia, Thermal stresses
MeSH Terms:
  • Animals
  • Embryo, Nonmammalian/pathology*
  • Heat Stress Disorders/etiology*
  • Heat Stress Disorders/pathology
  • Heat-Shock Response*
  • Hot Temperature/adverse effects*
  • Osmosis*
  • Somites/pathology*
  • Zebrafish/embryology*
PubMed: 28006008 Full text @ PLoS One
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ABSTRACT
During vertebrate embryonic development, early skin, muscle, and bone progenitor populations organize into segments known as somites. Defects in this conserved process of segmentation lead to skeletal and muscular deformities, such as congenital scoliosis, a curvature of the spine caused by vertebral defects. Environmental stresses such as hypoxia or heat shock produce segmentation defects, and significantly increase the penetrance and severity of vertebral defects in genetically susceptible individuals. Here we show that a brief exposure to a high osmolarity solution causes reproducible segmentation defects in developing zebrafish (Danio rerio) embryos. Both osmotic shock and heat shock produce border defects in a dose-dependent manner, with an increase in both frequency and severity of defects. We also show that osmotic treatment has a delayed effect on somite development, similar to that observed in heat shocked embryos. Our results establish osmotic shock as an alternate experimental model for stress, affecting segmentation in a manner comparable to other known environmental stressors. The similar effects of these two distinct environmental stressors support a model in which a variety of cellular stresses act through a related response pathway that leads to disturbances in the segmentation process.
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