A Single Wave of Monocytes Is Sufficient to Replenish the Long-Term
bioRxiv preprint doi: https://doi.org/10.1101/617514; this version posted April 24, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. A single wave of monocytes is sufficient to replenish the long-term Langerhans cell network after immune injury Ivana R. Ferrer1,2,a, Heather C. West1,2,a, Stephen Henderson2, Dmitry S. Ushakov3, Pedro Santos e Sousa1,2, Jessica Strid4, Ronjon Chakraverty1,2, Andrew J. Yates5, and Clare L. Bennett1,2 1Institute of Immunity and Transplantation, Division of Infection and Immunity, University College London, London NW3 2PF, UK 2Haematology, Division of Cancer Studies, University College London, London WC1E 6DD, UK. 3Peter Gorer Department of Immunobiology, School of Immunology and Microbial Sciences, King’s College London, New Hunt’s House, Newcomen St, London SE1 1UL, UK 4Division of Immunology and Inflammation, Imperial College London, Hammersmith campus, London W12 0NN, UK. 5Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY10032, USA. aThese authors contributed equally to this work Abstract • Immune injury and inefficient repopulation by Embryo-derived Langerhans cells (eLC) are maintained within monocyte-derived cells lead to a permanently altered the sealed epidermis without contribution from circulating cells. LC niche. When the network is perturbed by transient exposure to ultra- violet light, short-term LC are temporarily reconstituted from an initial wave of monocytes, but thought to be superseded by more permanent repopulation with undefined LC precur- sors. However, the extent to which this mechanism is relevant to immune-pathological processes that damage LC population integrity is not known.
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