Neuro-mesodermal assembloids recapitulate aspects of peripheral nervous system developmentin vitro

Anna F. Rockel, Nicole Wagner, Süleyman Ergün, Philipp Wörsdörfer
2022 · doi:10.1101/2022.06.30.498240
preprint OA: closed
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Abstract

Here we describe a novel neuro-mesodermal assembloid model which recapitulates aspects of peripheral nervous system (PNS) development such as neural crest cell (NCC) induction, delamination, migration and sensory as well as sympathetic ganglion formation. The ganglia send neuronal projections to the mesodermal as well as the neural compartment. Axons in the mesodermal part are associated with Schwann cells. In addition, peripheral ganglia as well as nerve fibers interact with the co-developing vascular plexus, forming a neurovascular niche. Finally, developing sensory ganglia show response to capsaicin treatment indicating their functionality. The presented assembloid model could help to uncover mechanisms of NCC delamination, migration and PNS development in the human tissue context. Moreover, the model could be used for toxicity screenings or drug testing. The co-development of mesodermal and neuroectodermal tissues and of a well-organized vascular plexus along with a peripheral nervous system allows to investigate the crosstalk between neuroectoderm and mesoderm and between peripheral neurons/neuroblasts and endothelial cells. Such interactions influence NCC delamination and migration, sensory neuron differentiation and rearrangement of the primitive vascular plexus in the embryo.

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