title: The modulation of catecholamines to the immune response against bacteria Vibrio anguillarum challenge in scallop Chlamys farreri.
abstract: Catecholamines are pivotal signal molecules in the neuroendocrine-immune regulatory network, and implicated in the modulation of immune response. In the present study, the activities of some immune-related enzymes and the concentration of catecholamines were determined in circulating haemolymph of scallops Chlamys farreri after bacteria Vibrio anguillarum challenge. The activities of superoxide dismutase (SOD), catalase (CAT) and lysozyme (LYZ) increased significantly and reached 610 U mg(-1) at 12 h, 37.6 U mg(-1) at 6 h and 261.5 U mg(-1) at 6 h after bacteria challenge, respectively. The concentration of norepinephrine, epinephrine and dopamine also increased significantly and reached 114.9 ng mL(-1) at 12 h, 86.9 ng mL(-1) at 24 h and 480.4 pg mL(-1) at 12 h after bacteria challenge, respectively. Meanwhile, the activities of these immune-related enzymes in haemolymph were monitored in those scallops which were challenged by bacteria V. anguillarum and stimulated simultaneously with norepinephrine, epinephrine and adrenoceptor antagonist. The injection of norepinephrine and epinephrine repressed significantly the induction of bacteria challenge on the activities of immune-related enzymes, and they were reduced to about half of that in the control groups. The blocking of α and β-adrenoceptor by antagonist only repressed the increase of CAT and LYZ activities significantly, while no significant effect was observed on the increase of SOD activities. The collective results indicated that scallop catecholaminergic neuroendocrine system could be activated by bacteria challenge to release catecholamines after the immune response had been triggered, and the immune response against bacteria challenge could been negatively modulated by norepinephrine, epinephrine, and adrenoceptor antagonist. This information is helpful to further understand the immunomodulation of catecholamines in scallops.
authors: Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao 266071, Shandong, China.
authors: Zhi
authors: Z
authors: Zhou
authors: Lingling
authors: L
authors: Wang
authors: Xiaowei
authors: X
authors: Shi
authors: Huan
authors: H
authors: Zhang
authors: Yang
authors: Y
authors: Gao
authors: Mengqiang
authors: M
authors: Wang
authors: Pengfei
authors: P
authors: Kong
authors: Limei
authors: L
authors: Qiu
authors: Linsheng
authors: L
authors: Song
mesh_terms: D018674:Adrenergic Antagonists / Q000494:pharmacology; D000704:Analysis of Variance; D000818:Animals; D002374:Catalase / Q000097:blood; D002395:Catecholamines / Q000097:blood / Q000276:immunology*; D004298:Dopamine / Q000494:pharmacology; D004797:Enzyme-Linked Immunosorbent Assay; D004837:Epinephrine / Q000494:pharmacology; D056747:Immunomodulation / Q000187:drug effects / Q000276:immunology*; D009113:Muramidase / Q000097:blood; D009638:Norepinephrine / Q000494:pharmacology; D049897:Pectinidae / Q000276:immunology* / Q000382:microbiology*; D013482:Superoxide Dismutase / Q000097:blood; D014733:Vibrio / Q000276:immunology*
chemical_list: D018674:Adrenergic Antagonists; D002395:Catecholamines; D002374:Catalase; D013482:Superoxide Dismutase; D009113:Muramidase; D004298:Dopamine; D009638:Norepinephrine; D004837:Epinephrine