PMID- 28258963 OWN - NLM STAT- MEDLINE DCOM- 20180426 LR - 20180426 IS - 1398-9995 (Electronic) IS - 0105-4538 (Linking) VI - 72 IP - 9 DP - 2017 Sep TI - Interferon-gamma-induced insufficient autophagy contributes to p62-dependent apoptosis of epithelial cells in chronic rhinosinusitis with nasal polyps. PG - 1384-1397 LID - 10.1111/all.13153 [doi] AB - BACKGROUND: Autophagy is a lysosomal degradation pathway that is essential for cell survival, differentiation, and homeostasis. This study aimed to investigate the contribution of autophagy to the pathogenesis of CRS with nasal polyps (CRSwNP). METHODS: The expression of autophagic proteins [microtubule-associated protein 1 light chain 3B (LC3B)-II, autophagy-related proteins (Atg), and Beclin 1], substrate proteins (p62 and ubiquitinated proteins), and apoptotic signaling molecules [cysteine-aspartic protease-3 and cysteine-aspartic protease-8, and poly-ADP-ribose polymerase] in the sinonasal mucosa and nasal epithelial cells (NECs) was detected by immunohistochemistry and Western blotting. Autophagic vacuoles were observed with transmission electron microscopy. BEAS-2B cells and NECs were treated with rapamycin, bafilomycin A1, or various cytokines. In some experiments, cultured NECs were transfected with small interfering RNA targeting p62 (sip62) or Atg5 (siAtg5). Cultured cells were analyzed with Western blotting and flow cytometry. RESULTS: Although autophagic protein expression and autophagic vacuole formation were increased in both eosinophilic and noneosinophilic CRSwNP, particularly in NECs, there was also an up-regulation of substrate proteins and apoptotic signaling molecules. IFN-gamma, but not IL-4, IL-13, or IL-17A, simultaneously enhanced LC3B-II and p62 levels as well as cell apoptosis in BEAS-2B cells and/or normal NECs. Bafilomycin A1 up-regulated the levels of LC3B-II and p62 in polyp NECs and IFN-gamma-treated normal NECs. IFN-gamma-induced apoptosis of normal NECs was exaggerated by bafilomycin A1 and siAtg5. Sip62 suppressed apoptosis of polyp NECs and IFN-gamma-treated NECs. IFN-gamma protein levels were increased in both eosinophilic and noneosinophilic CRSwNP. CONCLUSIONS: IFN-gamma induces activated but insufficient autophagy and thus contributes to a degree to p62-dependent apoptosis of NECs in CRSwNP. CI - (c) 2017 EAACI and John Wiley and Sons A/S. Published by John Wiley and Sons Ltd. FAU - Wang, B-F AU - Wang BF AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Cao, P-P AU - Cao PP AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Wang, Z-C AU - Wang ZC AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Li, Z-Y AU - Li ZY AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Wang, Z-Z AU - Wang ZZ AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Ma, J AU - Ma J AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Liao, B AU - Liao B AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Deng, Y-K AU - Deng YK AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Long, X-B AU - Long XB AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Xu, K AU - Xu K AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Wang, H AU - Wang H AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Wang, H AU - Wang H AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Zeng, M AU - Zeng M AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Lu, X AU - Lu X AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. FAU - Liu, Z AU - Liu Z AUID- ORCID: 0000-0002-4168-6702 AD - Department of Otolaryngology-Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R., China. LA - eng PT - Journal Article DEP - 20170404 PL - Denmark TA - Allergy JT - Allergy JID - 7804028 RN - 0 (P62 protein, human) RN - 0 (RNA-Binding Proteins) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Apoptosis/*drug effects MH - Autophagy/*drug effects MH - Cells, Cultured MH - Chronic Disease MH - Epithelial Cells/*cytology MH - Humans MH - Interferon-gamma/*pharmacology MH - Nasal Polyps/*complications MH - RNA-Binding Proteins/*pharmacology MH - Rhinitis/complications/etiology/*pathology MH - Sinusitis/complications/etiology/*pathology OTO - NOTNLM OT - apoptosis OT - autophagy OT - epithelial cell OT - interferon-gamma OT - nasal polyps EDAT- 2017/03/05 06:00 MHDA- 2018/04/27 06:00 CRDT- 2017/03/05 06:00 PHST- 2017/02/28 00:00 [accepted] PHST- 2017/03/05 06:00 [pubmed] PHST- 2018/04/27 06:00 [medline] PHST- 2017/03/05 06:00 [entrez] AID - 10.1111/all.13153 [doi] PST - ppublish SO - Allergy. 2017 Sep;72(9):1384-1397. doi: 10.1111/all.13153. Epub 2017 Apr 4.