PMID- 24747969 OWN - NLM STAT- MEDLINE DCOM- 20150604 LR - 20230614 IS - 1476-5594 (Electronic) IS - 0950-9232 (Print) IS - 0950-9232 (Linking) VI - 34 IP - 13 DP - 2015 Mar 26 TI - MUC4 regulates cellular senescence in head and neck squamous cell carcinoma through p16/Rb pathway. PG - 1698-708 LID - 10.1038/onc.2014.102 [doi] AB - The limited effectiveness of therapy for patients with advanced stage head and neck squamous cell carcinoma (HNSCC) or recurrent disease is a reflection of an incomplete understanding of the molecular basis of HNSCC pathogenesis. MUC4, a high molecular weight glycoprotein, is differentially overexpressed in many human cancers and implicated in cancer progression and resistance to several chemotherapies. However, its clinical relevance and the molecular mechanisms through which it mediates HNSCC progression are not well understood. This study revealed a significant upregulation of MUC4 in 78% (68/87) of HNSCC tissues compared with 10% positivity (1/10) in benign samples (P=0.006, odds ratio (95% confidence interval)=10.74 (2.0-57.56). MUC4 knockdown (KD) in SCC1 and SCC10B HNSCC cell lines resulted in significant inhibition of growth in vitro and in vivo, increased senescence as indicated by an increase in the number of flat, enlarged and senescence-associated beta-galactosidase (SA-beta-Gal)-positive cells. Decreased cellular proliferation was associated with G0/G1 cell cycle arrest and decrease expression of cell cycle regulatory proteins like cyclin E, cyclin D1 and decrease in BrdU incorporation. Mechanistic studies revealed upregulation of p16, pRb dephosphorylation and its interaction with histone deacetylase 1/2. This resulted in decreased histone acetylation (H3K9) at cyclin E promoter leading to its downregulation. Orthotopic implantation of MUC4 KD SCC1 cells into the floor of the mouth in nude mice resulted in the formation of significantly smaller tumors (170+/-18.30 mg) compared to those (375+/-17.29 mg) formed by control cells (P=0.00007). In conclusion, our findings showed that MUC4 overexpression has a critical role by regulating proliferation and cellular senescence of HNSCC cells. Downregulation of MUC4 may be a promising therapeutic approach for treating HNSCC patients. FAU - Macha, M A AU - Macha MA AD - Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Rachagani, S AU - Rachagani S AD - Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Pai, P AU - Pai P AD - Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Gupta, S AU - Gupta S AD - Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Lydiatt, W M AU - Lydiatt WM AD - Department of Otolaryngology, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Smith, R B AU - Smith RB AD - Department of Otolaryngology, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Johansson, S L AU - Johansson SL AD - Department of Pathology, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Lele, S M AU - Lele SM AD - Department of Pathology, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Kakar, S S AU - Kakar SS AD - Department of Physiology and Biophysics, University of Louisville, Louisville, KY, USA. FAU - Farghaly, H AU - Farghaly H AD - Department of Physiology and Biophysics, University of Louisville, Louisville, KY, USA FAU - Lee, J H AU - Lee JH AD - Sanford ENT-Head and Neck Surgery, Sanford Cancer Research Center, Sioux Falls, SD, USA. FAU - Meza, J AU - Meza J AD - Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Ganti, A K AU - Ganti AK AD - Department of Internal Medicine, VA Nebraska Western Iowa Health Care System and University of Nebraska Medical Center, Omaha, NE, USA. FAU - Jain, M AU - Jain M AD - 1] Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA [2] Buffett Cancer Center, Omaha, NE, USA. FAU - Batra, S K AU - Batra SK AD - 1] Department of Biochemistry and Molecular Biology, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA [2] Buffett Cancer Center, Omaha, NE, USA [3] Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA. LA - eng GR - U54 CA163120/CA/NCI NIH HHS/United States GR - U01 CA111294/CA/NCI NIH HHS/United States GR - P50 CA 127297/CA/NCI NIH HHS/United States GR - P50 CA127297/CA/NCI NIH HHS/United States GR - R21 CA156037/CA/NCI NIH HHS/United States GR - R01 CA133774/CA/NCI NIH HHS/United States GR - P20 GM103480/GM/NIGMS NIH HHS/United States GR - UO1 CA111294/CA/NCI NIH HHS/United States GR - P20 RR021937/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20140421 PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (CDKN2A protein, human) RN - 0 (Cyclin E) RN - 0 (Cyclin-Dependent Kinase Inhibitor p16) RN - 0 (MUC4 protein, human) RN - 0 (Mucin-4) RN - 0 (Neoplasm Proteins) RN - 0 (Retinoblastoma Protein) SB - IM EIN - Oncogene. 2015 May 21;34(21):2814. Farghaly, H [added]. PMID: 25994150 MH - Animals MH - Carcinoma, Squamous Cell/*pathology MH - Cell Cycle Checkpoints MH - Cell Line, Tumor MH - Cell Movement MH - Cell Proliferation MH - *Cellular Senescence MH - Chromatin Assembly and Disassembly MH - Cyclin E/analysis MH - Cyclin-Dependent Kinase Inhibitor p16 MH - Head and Neck Neoplasms/*pathology MH - Humans MH - Mice MH - Mucin-4/analysis/*physiology MH - Neoplasm Invasiveness MH - Neoplasm Proteins/*physiology MH - Retinoblastoma Protein/*physiology MH - Squamous Cell Carcinoma of Head and Neck PMC - PMC4205229 MID - NIHMS591176 EDAT- 2014/04/22 06:00 MHDA- 2015/06/05 06:00 PMCR- 2016/03/26 CRDT- 2014/04/22 06:00 PHST- 2014/01/24 00:00 [received] PHST- 2014/03/10 00:00 [revised] PHST- 2014/03/17 00:00 [accepted] PHST- 2014/04/22 06:00 [entrez] PHST- 2014/04/22 06:00 [pubmed] PHST- 2015/06/05 06:00 [medline] PHST- 2016/03/26 00:00 [pmc-release] AID - onc2014102 [pii] AID - 10.1038/onc.2014.102 [doi] PST - ppublish SO - Oncogene. 2015 Mar 26;34(13):1698-708. doi: 10.1038/onc.2014.102. Epub 2014 Apr 21.