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- W2021274718 endingPage "2273" @default.
- W2021274718 startingPage "2261" @default.
- W2021274718 abstract "Mechanosensory hair cells within the zebrafish lateral line spontaneously regenerate after aminoglycoside-induced death. Exposure of 5-d-old larvae to 400 μ m neomycin for 1 h results in death of almost all lateral line hair cells. Regeneration of new hair cells is observed by 24 h after neomycin treatment with nearly complete replacement by 72 h. Using bromodeoxyuridine incorporation, we show that the majority of new hair cells are generated from a transient increase in support cell proliferation that occurs between 12 and 21 h after neomycin damage. Additional observations reveal two distinct subsets of proliferating support cells within the neuromasts that differ in position, morphology, and temporal pattern of proliferation in response to neomycin exposure. We hypothesize that proliferative hair cell progenitors are located centrally within the neuromasts, whereas peripheral support cells may have a separate function. Expression of Notch signaling pathway members notch3 , deltaA , and atoh1a transcripts are all upregulated within the first 24 h after neomycin treatment, during the time of maximum proliferation of support cells and hair cell progenitor formation. Treatment with a γ-secretase inhibitor results in excess regenerated hair cells by 48 h after neomycin-induced death but has no effect without previous damage. Excess hair cells result from increased support cell proliferation. These results suggest a model where Notch signaling limits the number of hair cells produced during regeneration by regulating support cell proliferation." @default.
- W2021274718 created "2016-06-24" @default.
- W2021274718 creator A5012988440 @default.
- W2021274718 creator A5016120668 @default.
- W2021274718 creator A5035188675 @default.
- W2021274718 date "2008-02-27" @default.
- W2021274718 modified "2023-10-12" @default.
- W2021274718 title "Notch Signaling Regulates the Extent of Hair Cell Regeneration in the Zebrafish Lateral Line" @default.
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