STIM1 and peritonitis: To determine the role of STIM1 in monocyte infiltration we measured the recruitment of adoptively transferred monocytes in vivo using the well-characterized zymosan model of peritonitis (41) First, we isolated and purified monocytes from the bone marrow of male or female WT or STIM1-KO mice and labeled them with the cell tracer CytoTrace Green CMFDA.