Endoplasmic reticulum-mediated phagocytosis is a mechanism of entry into macrophages.

By É. Gagnon, S. Duclos, Christiane Rondeau, É. Chevet, P. H. Cameron, O. Steele‐Mortimer, J. Paiement, J. Bergeron, M. Desjardins. Cell, 2002

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TLR9 signals after translocating from the ER to CpG DNA in the lysosome (2004, background): “A similar mechanism has been proposed for phagocytic uptake pathway”
Matters Arising Quantitative and Dynamic Assessment of the Contribution of the ER to Phagosome Formation (2005, methodology): “Using electron microscopy (EM) and glucose 6-phosphatase cytochemistry, Desjardins and colleagues (Gagnon et al., 2002) suggested that during phagocytosis, the ER is recruited to sites of particle ingestion, where it fuses with the plasma membrane.”
ER–phagosome fusion defines an MHC class I cross-presentation compartment in dendritic cells (2003, background): “In macrophages, phagosomes were recently shown to fuse with the ER during or soon after engulfmen”
The Vegetative Vacuole Proteome of Arabidopsis thaliana Reveals Predicted and Unexpected Proteinsw⃞ (2004, background): “The finding of ER proteins in these organelles was later found to have great biological significance based upon the observation that the ER serves as a source of membrane material for maturing phagosomes (Gagnon et al., 2002).”
Immunoregulatory functions of surfactant proteins (2005, background): “Furthermore, a recent study by Gagnon and co-worker”
Phagosomes are competent organelles for antigen cross-presentation (2003, background): “The finding that phagocytosis in macrophages proceeds by ER recruitment at the cell surface, a process referred to as ER-mediated phagocytosi”