St. Elizabeth's Medical Center 1 article published in JoVE Bioengineering Assessing Leukocyte-endothelial Interactions Under Flow Conditions in an Ex Vivo Autoperfused Microflow Chamber Assay Lama Mulki*1,2, J. Harry Sweigard*1, Kip M. Connor1 1Angiogenesis Laboratory, Department of Ophthalmology, Harvard Medical School, Massachusetts Eye & Ear Infirmary, 2 Here, we present a protocol that allows the investigator to assess leukocyte recruitment dynamics ex vivo by connecting a chamber coated with endothelial-derived adhesion molecules to the circulatory system of a mouse. This method offers significant advantages since it allows for leukocyte assessment under relative biological conditions.