PMID- 31529740 OWN - NLM STAT- MEDLINE DCOM- 20200225 LR - 20200225 IS - 1365-2672 (Electronic) IS - 1364-5072 (Linking) VI - 128 IP - 1 DP - 2020 Jan TI - Immune gene expression in gilthead seabream (Sparus aurata) after Lymphocystis disease virus (LCDV-Sa) challenge resulting in asymptomatic infection. PG - 41-53 LID - 10.1111/jam.14454 [doi] AB - AIMS: To determine the immune gene expression response of gilthead seabream (Sparus aurata) that is experimentally infected with the lymphocystivirus LCDV-Sa. METHODS AND RESULTS: Viral DNA and transcripts were detected by qPCR in all samples from fish injected with LCDV-Sa, demonstrating that the virus establish a systemic and asymptomatic infection. The expression of 23 immune-related genes was also analysed by RT-qPCR in the head kidney (HK) and intestine at several times post-infection (dpi). In HK, the expression of five type I interferon (IFN)-related genes (ifn, irf3, mx2, mx3 and isg15), il10 and ck10 was upregulated at 1-3 dpi, while genes related to the inflammation process (tnfalpha, il1ss, il6, casp1) were not differentially expressed or even downregulated. The expression profile in the intestine was different regarding type I INF-related genes. An upregulated c3 and ighm expression was observed in both HK and intestine at 3-8 dpi. Finally, the transcription of nccrp1 and mhcIIalpha was induced in HK, whereas tcrbeta expression was downregulated in both organs. CONCLUSIONS: LCDV-Sa seems to trigger an immune response in gilthead seabream characterized by a partial activation of type I IFN system and a lack of systemic inflammatory response which may be related to viral persistence. SIGNIFICANCE AND IMPACT OF THE STUDY: The immune response observed in gilthead seabream infected by LCDV-Sa could be implicated in the establishment of an asymptomatic persistent infection. CI - (c) 2019 The Society for Applied Microbiology. FAU - Leiva-Rebollo, R AU - Leiva-Rebollo R AD - Departamento de Microbiologia, Universidad de Malaga, Malaga, Spain. FAU - Labella, A M AU - Labella AM AD - Departamento de Microbiologia, Universidad de Malaga, Malaga, Spain. FAU - Borrego, J J AU - Borrego JJ AUID- ORCID: 0000-0002-2174-0652 AD - Departamento de Microbiologia, Universidad de Malaga, Malaga, Spain. FAU - Castro, D AU - Castro D AUID- ORCID: 0000-0002-1589-3820 AD - Departamento de Microbiologia, Universidad de Malaga, Malaga, Spain. LA - eng SI - GENBANK/KF857324 SI - GENBANK/AY751798 SI - GENBANK/AY962254 SI - GENBANK/AM920661 SI - GENBANK/FJ490556 SI - GENBANK/FJ490555 SI - GENBANK/FJ652200 SI - GENBANK/AJ413189 SI - GENBANK/AJ277166 SI - GENBANK/EU244588 SI - GENBANK/JX976621 SI - GENBANK/AM490060 SI - GENBANK/GU181394 SI - GENBANK/GU181390 SI - GENBANK/HM543456 SI - GENBANK/AY651258 SI - GENBANK/AM261209 SI - GENBANK/AM493677 SI - GENBANK/DQ019401 SI - GENBANK/AF384096 SI - GENBANK/AF184170 GR - P12-RNM-2261/Junta de Andalucia/ PT - Journal Article DEP - 20191003 PL - England TA - J Appl Microbiol JT - Journal of applied microbiology JID - 9706280 RN - 0 (Cytokines) RN - 0 (Fish Proteins) SB - IM MH - Animals MH - *Asymptomatic Infections MH - Cytokines/genetics MH - DNA Virus Infections/immunology/*veterinary/virology MH - Fish Diseases/*immunology/virology MH - Fish Proteins/genetics MH - Gene Expression Regulation/*immunology MH - Head Kidney/immunology MH - Intestines/immunology MH - Iridoviridae/*physiology MH - Sea Bream/genetics/*immunology/virology OTO - NOTNLM OT - asymptomatic infection OT - gilthead seabream (Sparus aurata) OT - immune gene expression OT - lymphocystis disease virus OT - viral challenge EDAT- 2019/09/19 06:00 MHDA- 2020/02/26 06:00 CRDT- 2019/09/19 06:00 PHST- 2019/05/30 00:00 [received] PHST- 2019/08/04 00:00 [revised] PHST- 2019/09/04 00:00 [accepted] PHST- 2019/09/19 06:00 [pubmed] PHST- 2020/02/26 06:00 [medline] PHST- 2019/09/19 06:00 [entrez] AID - 10.1111/jam.14454 [doi] PST - ppublish SO - J Appl Microbiol. 2020 Jan;128(1):41-53. doi: 10.1111/jam.14454. Epub 2019 Oct 3.