PMID- 30012189 OWN - NLM STAT- MEDLINE DCOM- 20181127 LR - 20181127 IS - 1756-3305 (Electronic) IS - 1756-3305 (Linking) VI - 11 IP - 1 DP - 2018 Jul 16 TI - Pike intestinal reaction to Acanthocephalus lucii (Acanthocephala): immunohistochemical and ultrastructural surveys. PG - 424 LID - 10.1186/s13071-018-3002-6 [doi] LID - 424 AB - BACKGROUND: The Northern pike, Esox lucius, is a large, long-lived, top-predator fish species and occupies a broad range of aquatic environments. This species is on its way to becoming an important model organism and has the potential to contribute new knowledge and a better understanding of ecology and evolutionary biology. Very few studies have been done on the intestinal pathology of pike infected with helminths. The present study details the first Italian record of adult Acanthocephalus lucii reported in the intestine of E. lucius. RESULTS: A total of 22 pike from Lake Piediluco (Central Italy) were examined, of which 16 (72.7%) were infected with A. lucii. The most affected areas of gastrointestinal tract were the medium and distal intestine. The intensity of infection ranged from 1 to 18 parasites per host. Acanthocephalus lucii penetrated mucosal and submucosal layers which had a high number of mast cells (MCs) with an intense degranulation. The cellular elements involved in the immune response within the intestine of pike were assessed by ultrastructural techniques and immunohistochemistry using antibodies against met-enkephalin, immunoglobulin E (IgE)-like receptor (FCepsilonRIgamma), histamine, interleukin-6, interleukin-1beta, substance P, lysozyme, serotonin, inducible-nitric oxide synthase (i-NOS), tumor necrosis factor-alpha (TNF-alpha) and the antimicrobial peptide piscidin 3 (P3). In intestines of the pike, several MCs were immunopositive to 9 out of the 11 aforementioned antibodies and infected fish had a higher number of positive MCs when compared to uninfected fish. CONCLUSIONS: Pike intestinal tissue response to A. lucii was documented. Numerous MCs were seen throughout the mucosa and submucosal layers. In infected and uninfected intestines of pike, MCs were the dominant immune cell type encountered; they are the most common granulocyte type involved in several fish-helminth systems. Immunopositivity of MCs to 9 out of 11 antibodies is of great interest and these cells could play an important key role in the host response to an enteric helminth. This is the first report of A. lucii in an Italian population of E. lucius and the first account on positivity of MCs to piscidin 3 and histamine in a non-perciform fish. FAU - Sayyaf Dezfuli, Bahram AU - Sayyaf Dezfuli B AD - Department of Life Sciences and Biotechnology, University of Ferrara, St. Borsari 46, 44121, Ferrara, Italy. dzb@unife.it. FAU - Giari, Luisa AU - Giari L AD - Department of Life Sciences and Biotechnology, University of Ferrara, St. Borsari 46, 44121, Ferrara, Italy. FAU - Lorenzoni, Massimo AU - Lorenzoni M AD - Department of Cellular and Environmental Biology, University of Perugia, St. Elce di sotto 5, 06123, Perugia, Italy. FAU - Carosi, Antonella AU - Carosi A AD - Department of Cellular and Environmental Biology, University of Perugia, St. Elce di sotto 5, 06123, Perugia, Italy. FAU - Manera, Maurizio AU - Manera M AD - Faculty of Biosciences, Agro-Alimentary and Environmental Technologies, University of Teramo, St. Crispi 212, I-64100, Teramo, Italy. FAU - Bosi, Giampaolo AU - Bosi G AD - Department of Health, Animal Science and Food Safety, Universita degli Studi di Milano, Milan, Italy. LA - eng GR - FAR2017/Universita degli Studi di Ferrara/ PT - Journal Article DEP - 20180716 PL - England TA - Parasit Vectors JT - Parasites & vectors JID - 101462774 SB - IM MH - *Acanthocephala MH - Animals MH - Fish Diseases/immunology/*parasitology/pathology MH - Fishes/*parasitology MH - Immunohistochemistry MH - Intestinal Diseases, Parasitic/*veterinary MH - Intestines/parasitology/*ultrastructure MH - Parasitic Diseases, Animal/immunology/*parasitology/pathology PMC - PMC6048848 OTO - NOTNLM OT - Acanthocephalus lucii OT - Esox lucius OT - Fish OT - Helminth OT - Histamine OT - Inflammation OT - Mast cells OT - Piscidin 3 COIS- ETHICS APPROVAL AND CONSENT TO PARTICIPATE: All applicable institutional and/or national guidelines for the care and use of animals were followed. The study was approved by the ethical board of University of Ferrara, Italy. CONSENT FOR PUBLICATION: Not applicable. COMPETING INTERESTS: The authors declare that they have no competing interests. PUBLISHER'S NOTE: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. EDAT- 2018/07/18 06:00 MHDA- 2018/11/28 06:00 PMCR- 2018/07/16 CRDT- 2018/07/18 06:00 PHST- 2018/03/30 00:00 [received] PHST- 2018/07/06 00:00 [accepted] PHST- 2018/07/18 06:00 [entrez] PHST- 2018/07/18 06:00 [pubmed] PHST- 2018/11/28 06:00 [medline] PHST- 2018/07/16 00:00 [pmc-release] AID - 10.1186/s13071-018-3002-6 [pii] AID - 3002 [pii] AID - 10.1186/s13071-018-3002-6 [doi] PST - epublish SO - Parasit Vectors. 2018 Jul 16;11(1):424. doi: 10.1186/s13071-018-3002-6.