Increased homeostatic leukocyte recruitment into female peritoneal cavity. (A) Basal mRNA expression of chemokines CX3CL1, CCL2, CCL7, CXCL12, CXCL5, and CCL5 in mesenteric tissue (n = 6 mice). (B) Chemokine receptor mRNA expression in resident peritoneal cells (n = 4-6 mice). Levels of mRNA for each sample are normalized to corresponding mRNA levels of housekeeping gene for small 18S and calculated as the -fold expression relative to the mean value in males, except CX3CR1 (relative to female). All values are expressed as means ± SEM. *P < .05 and **P < .01 by Student t test. ND denotes chemokine expression that was not detected within 35 PCR cycles.