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<p>Human stem cell-based embryo models provide experimentally amenable in vitro systems for developmental research. A key feature of embryo models is their multi-lineage differentiation, which allows for the study of tissue co-development. Here we develop human trunk-like structures that have morphologically organized somites and a neural tube that form through self-organized, endogenous signalling. Transcriptomic comparison with human embryo datasets suggests that human trunk-like structure cells approximate Carnegie stage 13–14 (28–35 days after fertilization). The absence of a notochord leads to a dorsal identity, but exogenous Sonic Hedgehog signalling activation ventralizes both the somites and the neural tube in a dose-dependent manner. We further identify reciprocal signalling: neural tube-derived cues induce medial ALDH1A2 in somites, which in turn generate retinoic acid signals that drive spontaneous neural-tube patterning. Together, our data highlight the value of modularity in embryo models, which we leverage to explore human trunk co-development.</p>

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Modelling co-development between the somites and neural tube in human trunk-like structures

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月16日

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  • Komal Makwana,
  • Louise Tilley,
  • Probir Chakravarty,
  • Jamie Thompson,
  • Peter Baillie-Benson,
  • Ignacio Rodriguez-Polo,
  • Naomi Moris

摘要

Human stem cell-based embryo models provide experimentally amenable in vitro systems for developmental research. A key feature of embryo models is their multi-lineage differentiation, which allows for the study of tissue co-development. Here we develop human trunk-like structures that have morphologically organized somites and a neural tube that form through self-organized, endogenous signalling. Transcriptomic comparison with human embryo datasets suggests that human trunk-like structure cells approximate Carnegie stage 13–14 (28–35 days after fertilization). The absence of a notochord leads to a dorsal identity, but exogenous Sonic Hedgehog signalling activation ventralizes both the somites and the neural tube in a dose-dependent manner. We further identify reciprocal signalling: neural tube-derived cues induce medial ALDH1A2 in somites, which in turn generate retinoic acid signals that drive spontaneous neural-tube patterning. Together, our data highlight the value of modularity in embryo models, which we leverage to explore human trunk co-development.