part of part of has part has part has_part characteristic of has modifier histamine abnormal blood homeostasis abnormal histamine level abnormal circulating histamine level 2018-09-14T08:59:47Z aberrant concentration in the blood of histamine, an amine derived from the decarboxylation of histidine that is involved in local immune responses, in regulating physiological function in the gut, and that acts as a neurotransmitter for the brain, spinal cord, and uterus; histamine is involved in the inflammatory response and has a central role as a mediator of itching abnormal plasma histamine level MP:0030757 MPheno.ontology abnormal serum histamine level amount abnormal blood