PMID- 27376399 OWN - NLM STAT- MEDLINE DCOM- 20170906 LR - 20171204 IS - 1365-2583 (Electronic) IS - 0962-1075 (Linking) VI - 25 IP - 6 DP - 2016 Dec TI - Cotesia vestalis parasitization suppresses expression of a Plutella xylostella thioredoxin. PG - 679-688 LID - 10.1111/imb.12252 [doi] AB - Thioredoxins (Trxs) are a family of small, highly conserved and ubiquitous proteins involved in protecting organisms against toxic reactive oxygen species. In this study, a typical thioredoxin gene, PxTrx, was isolated from Plutella xylostella. The full-length cDNA sequence is composed of 959 bp containing a 321 bp open reading frame that encodes a predicted protein of 106 amino acids, a predicted molecular weight of 11.7 kDa and an isoelectric point of 5.03. PxTrx was mainly expressed in larval Malpighian tubules and the fat body. An enriched recombinant PxTrx had insulin disulphide reductase activity and stimulated Human Embryonic Kidney 293 (HEK293) cell proliferation. It also protected supercoiled DNA and living HEK293 cells from H(2) O(2) -induced damage. Parasitization by Cotesia vestalis and injections of 0.05 and 0.01 equivalents of C. vestalis Bracovirus (CvBv), the symbiotic virus carried by the parasitoid, led to down-regulation of PxTrx expression in host fat body. Taken together, our results indicate that PxTrx contributes to the maintenance of P. xylostella cellular haemostasis. Host fat body expression of PxTrx is strongly attenuated by parasitization and by injections of CvBv. CI - (c) 2016 The Royal Entomological Society. FAU - Shi, M AU - Shi M AD - Ministry of Agriculture Key Lab of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China. FAU - Zhao, S AU - Zhao S AD - Ministry of Agriculture Key Lab of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China. FAU - Wang, Z-H AU - Wang ZH AD - Ministry of Agriculture Key Lab of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China. FAU - Stanley, D AU - Stanley D AD - Biological Control of Insects Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Columbia, MO, USA. FAU - Chen, X-X AU - Chen XX AD - Ministry of Agriculture Key Lab of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160704 PL - England TA - Insect Mol Biol JT - Insect molecular biology JID - 9303579 RN - 0 (DNA, Complementary) RN - 0 (Insect Proteins) RN - 0 (RNA, Messenger) RN - 52500-60-4 (Thioredoxins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Cloning, Molecular MH - DNA, Complementary/genetics/metabolism MH - Down-Regulation/*physiology MH - Fat Body/metabolism MH - Female MH - *Host-Parasite Interactions MH - Insect Proteins/chemistry/*genetics/metabolism MH - Larva/genetics/parasitology/physiology MH - Male MH - Moths/*genetics/metabolism/*parasitology MH - Pupa/genetics/parasitology/physiology MH - RNA, Messenger/genetics/metabolism MH - Thioredoxins/chemistry/*genetics/metabolism MH - Wasps/*physiology OTO - NOTNLM OT - Plutella xylostella OT - antioxidant capacity OT - expression profile OT - parasitization OT - thioredoxin EDAT- 2016/07/05 06:00 MHDA- 2017/09/07 06:00 CRDT- 2016/07/05 06:00 PHST- 2016/07/05 06:00 [pubmed] PHST- 2017/09/07 06:00 [medline] PHST- 2016/07/05 06:00 [entrez] AID - 10.1111/imb.12252 [doi] PST - ppublish SO - Insect Mol Biol. 2016 Dec;25(6):679-688. doi: 10.1111/imb.12252. Epub 2016 Jul 4.