To deplete neutrophils, mice were treated with a 400 μg intraperitoneal injection of anti-mouse Ly6G antibody (108454, Biolegend) or IgG2b isotype control (400675, Biolegend) 24 h prior to injection of BSA-NPs. Subsequent 200 μg antibody injections were administered accompanied by BSA-NPs. Animals were euthanized after 16 h to collect peritoneal lavage fluid, ectopic lesions, and eutopic endometrium. Neutrophil depletion was confirmed by flow cytometry as described below.
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