A lowered blood glucose level also was observed in overnight-fasted , streptozotocin-treated ghrelin receptor-null mice that were administered GcgR monoclonal antibody .
O O B-ChemicalEntity I-ChemicalEntity O O O O O O O B-ChemicalEntity B-GeneOrGeneProduct I-GeneOrGeneProduct B-OrganismTaxon O O O B-GeneOrGeneProduct O O O