title: Norepinephrine regulates prophenoloxidase system-related parameters and gene expressions via α- and β-adrenergic receptors in Litopenaeus vannamei.
abstract: The total (THC) and differential haemocyte counts (DHC), phenoloxidase (PO) activity, and prophenoloxidase (proPO) system-related genes were investigated in haemocytes of Litopenaeus vannamei that received saline, norepinephrine (NE), and NE co-treated with various adrenergic receptor (AR) antagonists both in vivo and in vitro. Results showed that semi-granular and granular cells of shrimp which received NE, NE + phentolamine (Phe), NE + prazosin (Pra), NE + propanolol (Pro) and NE + metoprolol (Met) significantly decreased, while the PO activity of the shrimp received NE + Phe in vivo was significant higher than all the other treatments. PO activities of haemocytes exposed to saline, Pra + NE, and Met + NE were significantly higher than those of haemocytes exposed to NE, Phe + NE, and Pro + NE in vitro. Similar phenomena in lipopolysaccharide- and β-1,3-glucan-binding protein (LGBP), proPO-I, proPO-II, serine proteinases (SP), and peroxinectin (PE) messenger (m)RNA expressions of haemocytes exposed to saline, NE, and NE co-treated with various AR antagonists were observed both in vivo and in vitro. No significant differences were observed for LGBP and proPO-II mRNA expressions between haemocytes treated with saline and Pra + NE, for proPO-I mRNA expression between haemocytes treated with saline and Met + NE; or for SP and PE mRNA expressions among haemocytes treated with saline, Pra + NE, and Met + NE. These results suggest that stress-induced NE may promote the migration of circulating granulocytes to the site of the injection and the existing proPO mRNA translation which had been stored in granulocytes. NE downregulated the LGBP, proPO-I, proPO-II, SP, and PE gene transcription by haemocytes via α1-, β1-, α1-, α1- and β1-, and α1- and β1-ARs, respectively, which subsequently decreased the PO activity by α1- and β1-ARs in haemocytes of L. vannamei.
authors.affiliation: Department of Aquaculture, National Pingtung University of Science and Technology, 1 Sheuh Fu Rd., Nei Pu Hsiang, Pingtung 91201, Taiwan.
authors.forename: Chin-Chyuan
authors.initials: CC
authors.lastname: Chang
authors.forename: Pai-Po
authors.initials: PP
authors.lastname: Lee
authors.forename: Winton
authors.initials: W
authors.lastname: Cheng
mesh_terms: D000209:Acute-Phase Proteins / Q000378:metabolism; D058668:Adrenergic alpha-1 Receptor Antagonists / Q000494:pharmacology; D058671:Adrenergic beta-1 Receptor Antagonists / Q000494:pharmacology; D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism; D004156:Catechol Oxidase / Q000378:metabolism; D015815:Cell Adhesion Molecules / Q000378:metabolism; D004792:Enzyme Precursors / Q000378:metabolism; D015870:Gene Expression; D006434:Hemocytes / Q000187:drug effects / Q000201:enzymology; D037102:Lectins / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000378:metabolism; D014442:Monophenol Monooxygenase / Q000378:metabolism; D009638:Norepinephrine / Q000494:pharmacology*; D033561:Penaeidae / Q000187:drug effects / Q000201:enzymology / Q000276:immunology*; D012333:RNA, Messenger / Q000378:metabolism; D060888:Real-Time Polymerase Chain Reaction; D018340:Receptors, Adrenergic, alpha-1 / Q000378:metabolism*; D018342:Receptors, Adrenergic, beta-1 / Q000378:metabolism*; D057057:Serine Proteases / Q000378:metabolism; D000099231:Lipopolysaccharide-Binding Protein
chemical_list: D000209:Acute-Phase Proteins; D058668:Adrenergic alpha-1 Receptor Antagonists; D058671:Adrenergic beta-1 Receptor Antagonists; D002352:Carrier Proteins; D004156:Catechol Oxidase; D015815:Cell Adhesion Molecules; D004792:Enzyme Precursors; D037102:Lectins; D008562:Membrane Glycoproteins; D014442:Monophenol Monooxygenase; D009638:Norepinephrine; D012333:RNA, Messenger; D018340:Receptors, Adrenergic, alpha-1; D018342:Receptors, Adrenergic, beta-1; D057057:Serine Proteases; D000099231:Lipopolysaccharide-Binding Protein; C037937:glucan-binding proteins; C038451:pro-phenoloxidase