PMID- 16178359 OWN - NLM STAT- MEDLINE DCOM- 20051028 LR - 20190818 IS - 0031-1820 (Print) IS - 0031-1820 (Linking) VI - 131 IP - Pt 3 DP - 2005 Sep TI - Tumor necrosis factor receptor-mediated apoptosis in Trichinella spiralis-infected muscle cells. PG - 373-81 AB - In order to reveal the mechanisms underlying nurse cell formation during Trichinella spiralis infection, the expression of the factors of tumor necrosis factor-alpha (TNF-alpha)/TNF receptor 1 (TNFR-1) signalling pathway mediating apoptosis was investigated. The analysed factors included TNF-alpha, TNFR-1, TNF receptor-associated death-domain (TRADD), caspase 3, caspase 8, TNF receptor associated factor-2 (TRAF2) and receptor interactive protein (RIP), all of which are involved in the TNF-alpha/TNFR-1 signalling pathway-mediated apoptosis. The quantitative RT-PCR indicated that the infected muscle tissues up-regulate the expression of pro-apoptosis genes (TNF-alpha, TNFR-1 and TRADD, caspase 3 and caspase 8), and anti-apoptosis genes (TRAF2 and RIP) at the beginning of cyst formation. The expression returned to the normal level after cyst formation. The quantitative RT-PCR analysis of mRNA from tissue samples isolated by laser capture micro-dissection confirmed that the up-regulation of these genes was restricted in infected muscle cells, was not in the inflammation cells around infected muscle cells nor in normal muscle cells. The in situ localization study of proapoptosis (TRADD, caspase 3) and anti-apoptosis gene products (TRAF2) indicated that these were expressed in the basophilic cytoplasm (infected muscle cell origin) of the nurse cells. Thus the present study suggests that the TNF-alpha/ TNFR-1 signalling pathway is involved in nurse cell formation. FAU - Wu, Z AU - Wu Z AD - Department of Parasitology, Gifu University Graduate School of Medicine, Yanagito 1-1, Gifu 501-1194, Japan. FAU - Nagano, I AU - Nagano I FAU - Boonmars, T AU - Boonmars T FAU - Takahashi, Y AU - Takahashi Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Parasitology JT - Parasitology JID - 0401121 RN - 0 (Oligopeptides) RN - 0 (RNAIII inhibiting peptide) RN - 0 (Receptors, Tumor Necrosis Factor) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (Tumor Necrosis Factor Receptor-Associated Peptides and Proteins) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 3.4.22.- (Casp3 protein, mouse) RN - EC 3.4.22.- (Casp8 protein, mouse) RN - EC 3.4.22.- (Caspase 3) RN - EC 3.4.22.- (Caspase 8) RN - EC 3.4.22.- (Caspases) SB - IM MH - Animals MH - Apoptosis/*physiology MH - Caspase 3 MH - Caspase 8 MH - Caspases/metabolism MH - Gene Expression Regulation MH - Mice MH - Mice, Nude MH - Muscle, Skeletal/metabolism/parasitology/*pathology MH - Oligopeptides/metabolism MH - Receptors, Tumor Necrosis Factor/*physiology MH - Signal Transduction MH - TNF Receptor-Associated Factor 2/metabolism MH - *Trichinella spiralis MH - Trichinellosis/*pathology/physiopathology MH - Tumor Necrosis Factor Receptor-Associated Peptides and Proteins/metabolism MH - Tumor Necrosis Factor-alpha/physiology EDAT- 2005/09/24 09:00 MHDA- 2005/10/29 09:00 CRDT- 2005/09/24 09:00 PHST- 2005/09/24 09:00 [pubmed] PHST- 2005/10/29 09:00 [medline] PHST- 2005/09/24 09:00 [entrez] AID - 10.1017/s0031182005007663 [doi] PST - ppublish SO - Parasitology. 2005 Sep;131(Pt 3):373-81. doi: 10.1017/s0031182005007663.