PMID- 17492827 OWN - NLM STAT- MEDLINE DCOM- 20070629 LR - 20131121 IS - 0022-3417 (Print) IS - 0022-3417 (Linking) VI - 212 IP - 2 DP - 2007 Jun TI - Antiapoptotic effect of found in inflammatory zone (FIZZ)1 on mouse lung fibroblasts. PG - 180-7 AB - Myofibroblasts play an essential role in the abnormal deposition of extracellular matrix in pulmonary fibrosis. The presence or prolonged survival of these cells may be a key factor in the pathogenesis of progressive pulmonary fibrosis. Found in inflammatory zone (FIZZ)1 can induce myofibroblast differentiation and has an antiapoptotic effect on embryonic lung explant cultures. In this study, we investigated whether FIZZ1 also has an antiapoptotic effect on mouse lung fibroblasts (MLFs). Cells were treated with FIZZ1 for 24 h and then apoptosis was induced by TNFalpha in the presence of cycloheximide (CHX). FIZZ1 exhibited an antiapoptotic effect in MLFs, as assessed by flow cytometric analysis and TUNEL staining. Moreover, the cell number was higher in the FIZZ1-treated group relative to the non-treated control group after treatment with TNFalpha and CHX. FIZZ1 treatment also inhibited the apoptotic agent-induced activities of caspase-3 and caspase-8. Examination of potential signalling pathways revealed that FIZZ1 induced rapid phosphorylation of ERK-1/2, while PD98059, a MEK/ERK inhibitor, markedly induced activation of caspase-3. This anti-apoptotic effect of FIZZ1 was associated with induction of myofibroblast differentiation in response to FIZZ1 stimulation. Taken together, these findings suggest that FIZZ1 is involved in pulmonary fibrosis through both induction of myofibroblast differentiation and increased or prolonged survival of myofibroblasts. This effect of FIZZ1 was mediated by inhibition of caspase-3 and -8, with involvement of the ERK pathway. CI - Copyright 2007 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd. FAU - Chung, M J AU - Chung MJ AD - Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109-2200, USA. FAU - Liu, T AU - Liu T FAU - Ullenbruch, M AU - Ullenbruch M FAU - Phan, S H AU - Phan SH LA - eng GR - HL28737/HL/NHLBI NIH HHS/United States GR - HL31963/HL/NHLBI NIH HHS/United States GR - HL52285/HL/NHLBI NIH HHS/United States GR - HL77297/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - England TA - J Pathol JT - The Journal of pathology JID - 0204634 RN - 0 (Intercellular Signaling Peptides and Proteins) RN - 0 (Protein Synthesis Inhibitors) RN - 0 (Proteins) RN - 0 (Retnla protein, mouse) RN - 0 (Tumor Necrosis Factor-alpha) RN - 9061-61-4 (Nerve Growth Factor) RN - 98600C0908 (Cycloheximide) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) RN - EC 3.4.22.- (Caspase 3) RN - EC 3.4.22.- (Caspase 8) SB - IM MH - Animals MH - Apoptosis/*drug effects/immunology MH - Caspase 3/metabolism MH - Caspase 8/metabolism MH - Cell Differentiation/drug effects MH - Cycloheximide/pharmacology MH - Enzyme Activation/drug effects MH - Female MH - Fibroblasts/*drug effects/physiology MH - Intercellular Signaling Peptides and Proteins MH - Lung/*drug effects/physiology MH - MAP Kinase Signaling System/drug effects MH - Mice MH - Mice, Inbred CBA MH - Mitogen-Activated Protein Kinase 3/metabolism MH - Nerve Growth Factor/pharmacology MH - Protein Synthesis Inhibitors/pharmacology MH - Proteins/*pharmacology MH - Proto-Oncogene Proteins c-akt/analysis MH - Tumor Necrosis Factor-alpha/pharmacology EDAT- 2007/05/12 09:00 MHDA- 2007/06/30 09:00 CRDT- 2007/05/12 09:00 PHST- 2007/05/12 09:00 [pubmed] PHST- 2007/06/30 09:00 [medline] PHST- 2007/05/12 09:00 [entrez] AID - 10.1002/path.2161 [doi] PST - ppublish SO - J Pathol. 2007 Jun;212(2):180-7. doi: 10.1002/path.2161.