Since somatostatin ( SST ) , cortistatin ( CORT ) , and ghrelin systems modulate inflammatory response , we aim to comprehensively characterize the presence and regulation of the components of these systems in the peripheral blood mononuclear cells ( PMBCs ) , a subset of white blood cells placed at the crossroad between diet and inflammation , in response to diets with different fat composition , and during the postprandial phase in elderly subjects .