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  • Title: Branching morphogenesis in the developing kidney is not impacted by nephron formation or integration.
    Author: Short KM, Combes AN, Lisnyak V, Lefevre JG, Jones LK, Little MH, Hamilton NA, Smyth IM.
    Journal: Elife; 2018 Jul 31; 7():. PubMed ID: 30063208.
    Abstract:
    Branching morphogenesis of the ureteric bud is integral to kidney development; establishing the collecting ducts of the adult organ and driving organ expansion via peripheral interactions with nephron progenitor cells. A recent study suggested that termination of tip branching within the developing kidney involved stochastic exhaustion in response to nephron formation, with such a termination event representing a unifying developmental process evident in many organs. To examine this possibility, we have profiled the impact of nephron formation and maturation on elaboration of the ureteric bud during mouse kidney development. We find a distinct absence of random branch termination events within the kidney or evidence that nephrogenesis impacts the branching program or cell proliferation in either tip or progenitor cell niches. Instead, organogenesis proceeds in a manner indifferent to the development of these structures. Hence, stochastic cessation of branching is not a unifying developmental feature in all branching organs.
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