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首页> 外文期刊>Experimental Brain Research >Comparison of molecular marker expression in early zebrafish brain development following chronic ethanol or morpholino treatment
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Comparison of molecular marker expression in early zebrafish brain development following chronic ethanol or morpholino treatment

机译:慢性乙醇或吗啉治疗后早期斑马鱼脑发育中分子标记表达的比较

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摘要

This study was undertaken to ascertain whether defined markers of early zebrafish brain development are affected by chronic ethanol exposure or morpholino knockdown of agrin, sonic hedgehog, retinoic acid, and fibroblast growth factors, four signaling molecules that are suggested to be ethanol sensitive. Zebrafish embryos were exposed to 2% ethanol from 6 to 24 hpf or injected with agrin, shha, aldh1a3, or fgf8a morpholinos. In situ hybridization was employed to analyze otx2, pax6a, epha4a, krx20, pax2a, fgf8a, wnt1, and eng2b expression during early brain development. Our results showed that pax6a mRNA expression was decreased in eye, forebrain, and hindbrain of both chronic ethanol exposed and select MO treatments. Epha4a expression in rhombomere R1 boundary was decreased in chronic ethanol exposure and aldh1a3 morphants, lost in fgf8a morphants, but largely unaffected in agrin and shha morphants. Ectopic pax6a and epha4a expression in midbrain was only found in fgf8a morphants. These results suggest that while chronic ethanol induces obvious morphological change in brain architecture, many molecular markers of these brain structures are relatively unaffected by ethanol exposure.
机译:本研究旨在确定早期斑马鱼脑发育的定义标记是否受慢性乙醇暴露或古素,声波刺猬,视黄酸和成纤维细胞生长因子的影响,建议是乙醇敏感的四种信号分子。将斑马鱼胚胎暴露于2%乙醇,从6至24 hpf或注射agrin,shha,ald1a3或fgf8a morpholinos。原位杂交用于分析早期脑发育期间的OTX2,PAX6A,EPHA4A,KRX20,PAX2A,FGF8A,WNT1和ENG2B表达。我们的结果表明,慢性乙醇暴露的眼睛,前脑和后脑的PAX6A mRNA表达减少并选择MO处理。在慢性乙醇暴露和Aldh1a3的鱼中,在FGF8A的发生中减少了菱形R1边界中的Epha4a表达,但在FGF8A Morphants中丧失,但在agrin和Shha Morphants的主要不受影响。中脑中的异位pAX6A和Epha4a表达仅在FGF8A Morphants中发现。这些结果表明,虽然慢性乙醇诱导脑结构中明显的形态变化,但这些脑结构的许多分子标记相对不受乙醇暴露的影响。

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