PMID- 29246806 OWN - NLM STAT- MEDLINE DCOM- 20181212 LR - 20181212 IS - 1872-9428 (Electronic) IS - 0166-6851 (Linking) VI - 219 DP - 2018 Jan TI - Characterization of three salmon louse (Lepeophtheirus salmonis) genes with fibronectin II domains expressed by tegumental type 1 glands. PG - 1-9 LID - S0166-6851(17)30153-6 [pii] LID - 10.1016/j.molbiopara.2017.12.002 [doi] AB - The salmon louse, Lepeophtheirus salmonis (Copepoda: Caligidae), is currently the most significant pathogen affecting the salmon farming industry in the Northern Hemisphere. Exocrine glands of blood-feeding parasites are believed to be important for the host-parasite interaction, but also in the production of substances for integument lubrication and antifouling. In L. salmonis; however, we have limited knowledge about the exocrine glands. The aim of this study was therefore to examine three genes containing fibronectin type II (FNII) domains expressed in L. salmonis tegumental type 1 (teg 1) glands, namely LsFNII1, 2 and 3. LsFNII1, 2 and 3 contains four, three, and two FNII domains respectively. Sequence alignment of LsFNII domains showed conservation of amino acids that may indicate a possible involvement of LsFNII domains in collagen binding. Ontogenetic analysis of LsFNII1, 2 and 3 revealed highest expression in pre-adult and adult lice. Localization of LsFNII1, 2 and 3 transcripts showed expression in teg 1 glands only, which are the most abundant exocrine gland type in L. salmonis. LsFNII1, 2 and 3 were successfully knocked-down by RNAi, however, alteration in gland morphology was not detected between the knock-down and control groups. Overall, this study gives first insight into FNII domain containing proteins in L. salmonis. CI - Copyright (c) 2017 Elsevier B.V. All rights reserved. FAU - Harasimczuk, Ewa AU - Harasimczuk E AD - SLCR Sea Lice Research Center, Institute of Marine Research, 5817 Bergen, Norway. Electronic address: Ewa.Harasimczuk@hi.no. FAU - Overgard, Aina-Cathrine AU - Overgard AC AD - SLRC Sea Lice Research Center, Department of Biology, University of Bergen, Thormohlensgt. 55, 5008 Bergen, Norway. Electronic address: Cathrine.Overgard@uib.no. FAU - Grotmol, Sindre AU - Grotmol S AD - SLRC Sea Lice Research Center, Department of Biology, University of Bergen, Thormohlensgt. 55, 5008 Bergen, Norway. Electronic address: Sindre.Grotmol@uib.no. FAU - Nilsen, Frank AU - Nilsen F AD - SLRC Sea Lice Research Center, Department of Biology, University of Bergen, Thormohlensgt. 55, 5008 Bergen, Norway. Electronic address: Frank.Nilsen@uib.no. FAU - Dalvin, Sussie AU - Dalvin S AD - SLCR Sea Lice Research Center, Institute of Marine Research, 5817 Bergen, Norway. Electronic address: Sussie.dalvin@hi.no. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20171212 PL - Netherlands TA - Mol Biochem Parasitol JT - Molecular and biochemical parasitology JID - 8006324 RN - 0 (Fibronectins) SB - IM MH - Animals MH - Conserved Sequence MH - Copepoda/*genetics/metabolism MH - Exocrine Glands/*metabolism MH - Fibronectins/*genetics MH - Gene Expression Profiling MH - Gene Knockdown Techniques MH - Sequence Homology, Amino Acid OTO - NOTNLM OT - Crustacea OT - Exocrine glands OT - In situ hybridization OT - Integument OT - RNA interference OT - Sea lice EDAT- 2017/12/17 06:00 MHDA- 2018/12/13 06:00 CRDT- 2017/12/17 06:00 PHST- 2017/04/05 00:00 [received] PHST- 2017/10/30 00:00 [revised] PHST- 2017/12/11 00:00 [accepted] PHST- 2017/12/17 06:00 [pubmed] PHST- 2018/12/13 06:00 [medline] PHST- 2017/12/17 06:00 [entrez] AID - S0166-6851(17)30153-6 [pii] AID - 10.1016/j.molbiopara.2017.12.002 [doi] PST - ppublish SO - Mol Biochem Parasitol. 2018 Jan;219:1-9. doi: 10.1016/j.molbiopara.2017.12.002. Epub 2017 Dec 12.