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    XMU-MP-1 induces growth arrest in a model human mini-organ and antagonises cell cycle-dependent paclitaxel cytotoxicity

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    Authors
    Mitchell, Ellen
    Mellor, Charlotte E. L.
    Purba, Talveen S.; orcid: 0000-0003-3735-7735; email: talveen.purba@manchester.ac.uk
    Publication Date
    2020-09-17
    Submitted date
    2020-05-22
    
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    Abstract
    Abstract: Background: XMU-MP-1 is an inhibitor of the Hippo pathway kinases MST1/2 and has been shown to promote the downstream activation of the pro-proliferative, pro-regenerative and anti-apoptotic transcriptional regulator YAP1. We tested whether XMU-MP-1 can activate YAP1 in a model human mini-organ, namely the hair follicle, to determine whether it can be pharmacologically exploited to promote regeneration in the hair follicle as a novel strategy to treat pathological hair loss disorders. Results: XMU-MP-1 treatment inhibited MOB1 phosphorylation but did not increase active YAP1 in the hair follicle. Rather than promote proliferation, XMU-MP-1 serendipitously decreased the number of Ki-67+, EdU+ and phospho histone H3+ hair matrix keratinocytes and antagonised the cytotoxic effects of paclitaxel. Conclusions: XMU-MP-1 perturbs epithelial cell cycle progression in a model human mini-organ. This may arise as an off-target effect, especially when XMU-MP-1 has been described to strongly inhibit 21 additional kinases beyond MST1/2. Therefore, whilst these effects may be dependent on tissue context, researchers should exercise caution when interpreting the effects of XMU-MP-1, especially in tissues with actively proliferating cell populations.
    Citation
    Cell Division, volume 15, issue 1, page 11
    Publisher
    BioMed Central
    URI
    http://hdl.handle.net/10034/625880
    Type
    article
    Description
    From Springer Nature via Jisc Publications Router
    History: received 2020-05-22, registration 2020-09-03, accepted 2020-09-03, pub-electronic 2020-09-17, online 2020-09-17, collection 2020-12
    Publication status: Published
    Funder: Manchester Biomedical Research Centre; doi: http://dx.doi.org/10.13039/100014653
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