CXCR2 and hydrops fetalis: Expression of chemokines (Ccl3, Ccl4, and Ccl6), chemokine receptors (Ccr1, Ccr5, Cxcr2, Cxcl1, Cxcl2, and Cxcl13), and inflammatory factors (Mpo, Il-1β, and IL12) increased significantly in the DSS + HF group (Figure 4D).