CXCR2 and obesity due to melanocortin 4 receptor deficiency: It remains to be determined if AZD5069, which targets only CXCR2 without any action on macrophages, or other agents in its drug class interfere or modify these biochemical, enzymatic, and biological processes, directly or indirectly, thus strengthing the view that neutrophils are primary leukocytes in driving high fat diet/obesity-associated liver pathology.