骨形态发生蛋白信号通路与乙醇的相互作用独立于gata3而破坏腭的形成。

Bone morphogenetic protein signaling pathway- Ethanol interactions disrupt palate formation independent of gata3.

作者信息

Lovely C Ben

机构信息

University of Louisville, School of Medicine, Department of Biochemistry and Molecular Genetics, 319 Abraham Flexner Way, Louisville, KY 40202, USA.

出版信息

Reprod Toxicol. 2025 Jan;131:108754. doi: 10.1016/j.reprotox.2024.108754. Epub 2024 Nov 23.

Abstract

Fetal Alcohol Spectrum Disorders (FASD) describes a wide array of neurological defects and craniofacial malformations, associated with ethanol teratogenicity. While there is growing evidence for a genetic component to FASD, little is known of the genes underlying these ethanol-induced defects. Along with timing and dosage, genetic predispositions may help explain the variability within FASD. From a screen for gene-ethanol interactions, we found that mutants for Bmp signaling components are ethanol-sensitive leading to defects in the zebrafish palate. Loss of Bmp signaling results in reductions in gata3 expression in the maxillary domain of the neural crest in the 1st pharyngeal arch, leading to palate defects while upregulation of human GATA3 rescues these defects. Here, we show that ethanol-treated Bmp mutants exhibit misshaped and/or broken trabeculae. Surprisingly, up regulation of GATA3 does not rescue ethanol-induced palate defects and gata3 expression was not altered in ethanol-treated Bmp mutants or dorsomorphin-treated larvae. Timing of ethanol sensitivity shows that Bmp mutants are ethanol sensitive from 10 to 18 hours post-fertilization (hpf), prior to Bmp's regulation of gata3 in palate formation. This is consistent with our previous work with dorsomorphin-dependent knock down of Bmp signaling from 10 to 18 hpf disrupting endoderm formation and subsequent jaw development. Overall, this suggests that ethanol disrupts Bmp-dependent palate development independent of and earlier than the role of gata3 in palate formation by disrupting epithelial development. Ultimately, these data demonstrate that zebrafish is a useful model to identify and characterize gene-ethanol interactions and this work will directly inform our understanding of FASD.

摘要

胎儿酒精谱系障碍(FASD)描述了一系列与乙醇致畸性相关的神经缺陷和颅面畸形。虽然越来越多的证据表明FASD存在遗传因素,但对于这些乙醇诱导缺陷背后的基因却知之甚少。除了时间和剂量外,遗传易感性可能有助于解释FASD中的个体差异。通过对基因-乙醇相互作用的筛选,我们发现Bmp信号通路成分的突变体对乙醇敏感,会导致斑马鱼腭部出现缺陷。Bmp信号的缺失会导致第一咽弓神经嵴上颌区域的gata3表达减少,从而导致腭部缺陷,而人类GATA3的上调则可挽救这些缺陷。在这里,我们表明乙醇处理的Bmp突变体表现出小梁形状异常和/或断裂。令人惊讶的是,GATA3的上调并不能挽救乙醇诱导的腭部缺陷,并且在乙醇处理的Bmp突变体或多效唑处理的幼虫中,gata3的表达没有改变。乙醇敏感性的时间表明,Bmp突变体在受精后10至18小时(hpf)对乙醇敏感,这早于Bmp在腭部形成中对gata3的调控。这与我们之前关于在10至18 hpf通过多效唑依赖性敲低Bmp信号来破坏内胚层形成和随后的颌骨发育的研究结果一致。总体而言,这表明乙醇通过破坏上皮发育,独立于gata3在腭部形成中的作用且早于其作用,破坏了Bmp依赖性的腭部发育。最终,这些数据表明斑马鱼是识别和表征基因-乙醇相互作用的有用模型,这项工作将直接增进我们对FASD的理解。

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