Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, California, 94143, USA.
Genesis. 2021 Feb;59(1-2):e23405. doi: 10.1002/dvg.23405. Epub 2020 Dec 27.
From its long history in the field of embryology to its recent advances in genetics, Xenopus has been an indispensable model for understanding the human brain. Foundational studies that gave us our first insights into major embryonic patterning events serve as a crucial backdrop for newer avenues of investigation into organogenesis and organ function. The vast array of tools available in Xenopus laevis and Xenopus tropicalis allows interrogation of developmental phenomena at all levels, from the molecular to the behavioral, and the application of CRISPR technology has enabled the investigation of human disorder risk genes in a higher-throughput manner. As the only major tetrapod model in which all developmental stages are easily manipulated and observed, frogs provide the unique opportunity to study organ development from the earliest stages. All of these features make Xenopus a premier model for studying the development of the brain, a notoriously complex process that demands an understanding of all stages from fertilization to organogenesis and beyond. Importantly, core processes of brain development are conserved between Xenopus and human, underlining the advantages of this model. This review begins by summarizing discoveries made in amphibians that form the cornerstones of vertebrate neurodevelopmental biology and goes on to discuss recent advances that have catapulted our understanding of brain development in Xenopus and in relation to human development and disease. As we engage in a new era of patient-driven gene discovery, Xenopus offers exceptional potential to uncover conserved biology underlying human brain disorders and move towards rational drug design.
从其在胚胎学领域的悠久历史到最近在遗传学方面的进展,非洲爪蟾一直是理解人类大脑不可或缺的模型。为我们提供了对主要胚胎模式形成事件的最初见解的基础研究,为研究器官发生和器官功能的新途径提供了重要背景。非洲爪蟾和热带爪蟾中提供的大量工具可用于在从分子到行为的各个层面上研究发育现象,并且 CRISPR 技术的应用使我们能够以更高的通量研究人类疾病风险基因。作为唯一一种所有发育阶段都易于操作和观察的主要四足动物模型,青蛙为研究器官发育提供了独特的机会,从最早的阶段开始。所有这些特征使非洲爪蟾成为研究大脑发育的首选模型,因为大脑发育是一个众所周知的复杂过程,需要从受精到器官发生以及之后的所有阶段的理解。重要的是,非洲爪蟾和人类之间的大脑发育核心过程是保守的,这突显了该模型的优势。这篇综述首先总结了在两栖动物中发现的构成脊椎动物神经发育生物学基石的发现,然后讨论了最近的进展,这些进展推动了我们对非洲爪蟾和人类发育和疾病相关的大脑发育的理解。随着我们进入一个以患者为导向的基因发现的新时代,非洲爪蟾为揭示人类大脑疾病背后的保守生物学并朝着合理药物设计迈进提供了非凡的潜力。