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Cleavage of mer tyrosine kinase (MerTK) from the cell surface contributes to the regulation of retinal phagocytosisLaw, Ah-Lai; Parinot, Celia; Chatagnon, Jonathan; Gravez, Basile; Sahel, Jose-Alain; Bhattacharya, Shomi S.; Nandrot, Emeline F.; ; Sorbonne Universite; University College London; et al. (American Society for Biochemistry and Molecular Biology Inc., 2014-12-23)Background: The MerTK receptor is necessary for retinal phagocytosis and its daily rhythm. Results: MerTK is cleaved from the apical cell surface in vitro and in vivo, reducing the phagocytic capacity of RPE cells. Conclusion: MerTK cleavage might help control the duration of the daily phagocytic peak. Significance: Our data show that extracellular cleavage of MerTK partly regulates retinal phagocytosis.