PMID- 21642001 OWN - NLM STAT- MEDLINE DCOM- 20111024 LR - 20110704 IS - 1095-9947 (Electronic) IS - 1050-4648 (Linking) VI - 31 IP - 2 DP - 2011 Aug TI - Viral hemorrhagic septicaemia virus (VHSV) up-regulates the cytotoxic activity and the perforin/granzyme pathway in the rainbow trout RTS11 cell line. PG - 252-9 LID - 10.1016/j.fsi.2011.05.010 [doi] AB - A survey of immune-relevant genes that might be up-regulated in response to viral hemorrhagic septicaemia virus (VHSV) in the rainbow trout monocyte-macrophage cell line, RTS11, unexpectedly revealed an increased expression of perforin (PRF) and granzyme (GRZ) genes, which represent components of the major cytotoxic pathway. The natural killer-enhancing factor (NKEF), also known to modulate cytotoxic activity, was up-regulated at the gene but strikingly down-regulated at protein level. The expression of these genes was not affected in head kidney leukocytes (HKLs) infected with VHSV, leading us to evaluate the potential cytotoxic activity of RTS11 and HKLs. For the first time, the cytotoxic activity of RTS11 against xenogeneic targets has been demonstrated, although this was modest relative to HKLs. Yet the activity in RTS11 was significantly increased by VHSV, as in HKLs. This cytotoxic activity elicited by viral infection appeared to require viral gene expression because inactivated VHSV failed to increase RTS11 cytotoxic activity. As for other immune functions, RTS11 cells provide a model for further studying cytotoxic activities of fish monocyte-macrophages. CI - Copyright (c) 2011 Elsevier Ltd. All rights reserved. FAU - Ordas, M C AU - Ordas MC AD - Centro de Investigacion en Sanidad Animal (CISA-INIA), Carretera de Algete a El Casar km. 8.1, Valdeolmos 28130, Madrid, Spain. FAU - Cuesta, A AU - Cuesta A FAU - Mercado, L AU - Mercado L FAU - Bols, N C AU - Bols NC FAU - Tafalla, C AU - Tafalla C LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110527 PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - 0 (Fish Proteins) RN - 126465-35-8 (Perforin) RN - EC 3.4.21.- (Granzymes) SB - IM MH - Animals MH - Cell Line MH - *Cytotoxicity, Immunologic MH - Fish Proteins/genetics/*metabolism MH - Gene Expression Regulation MH - Genes, Viral MH - Granzymes/genetics/*metabolism MH - Hemorrhagic Septicemia, Viral/*immunology/virology MH - Kidney/cytology MH - Leukocytes/immunology MH - Macrophages/immunology MH - Monocytes/immunology MH - *Novirhabdovirus MH - *Oncorhynchus mykiss MH - Perforin/genetics/*metabolism MH - Up-Regulation EDAT- 2011/06/07 06:00 MHDA- 2011/10/25 06:00 CRDT- 2011/06/07 06:00 PHST- 2011/02/23 00:00 [received] PHST- 2011/05/11 00:00 [revised] PHST- 2011/05/11 00:00 [accepted] PHST- 2011/06/07 06:00 [entrez] PHST- 2011/06/07 06:00 [pubmed] PHST- 2011/10/25 06:00 [medline] AID - S1050-4648(11)00184-7 [pii] AID - 10.1016/j.fsi.2011.05.010 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2011 Aug;31(2):252-9. doi: 10.1016/j.fsi.2011.05.010. Epub 2011 May 27.