PMID- 25833829 OWN - NLM STAT- MEDLINE DCOM- 20160123 LR - 20220318 IS - 1538-7445 (Electronic) IS - 0008-5472 (Print) IS - 0008-5472 (Linking) VI - 75 IP - 7 DP - 2015 Apr 1 TI - PARD3 Inactivation in Lung Squamous Cell Carcinomas Impairs STAT3 and Promotes Malignant Invasion. PG - 1287-97 LID - 10.1158/0008-5472.CAN-14-2444 [doi] AB - Correct apicobasal polarization and intercellular adhesions are essential for the appropriate development of normal epithelia. Here, we investigated the contribution of the cell polarity regulator PARD3 to the development of lung squamous cell carcinomas (LSCC). Tumor-specific PARD3 alterations were found in 8% of LSCCs examined, placing PARD3 among the most common tumor suppressor genes in this malignancy. Most PAR3-mutant proteins exhibited a relative reduction in the ability to mediate formation of tight junctions and actin-based protrusions, bind atypical protein kinase C, activate RAC1, and activate STAT3 at cell confluence. Thus, PARD3 alterations prevented the formation of contacts between neighboring cells and the subsequent downstream signaling. Notably, reconstituting PAR3 activity in vivo reduced tumor-invasive and metastatic properties. Our findings define PARD3 as a recurrently inactivated cell polarity regulator in LSCC that affects tumor aggressiveness and metastasis. CI - (c)2015 American Association for Cancer Research. FAU - Bonastre, Ester AU - Bonastre E AD - Genes and Cancer Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain. FAU - Verdura, Sara AU - Verdura S AD - Genes and Cancer Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain. FAU - Zondervan, Ilse AU - Zondervan I AD - MRC-Holland, Willem Schoutenstraat, the Netherlands. FAU - Facchinetti, Federica AU - Facchinetti F AD - Tumor Genomics Unit, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy. FAU - Lantuejoul, Sylvie AU - Lantuejoul S AD - Department of Pathology, Institut Albert Bonniot, INSERM U823, University Joseph Fourier, CHU, Grenoble Hopital Michallon, Grenoble, France. FAU - Chiara, Maria Dolores AU - Chiara MD AD - Department of Otolaryngology of the Hospital Universitario Central de Asturias, Oviedo, Spain. FAU - Rodrigo, Juan Pablo AU - Rodrigo JP AD - Department of Otolaryngology of the Hospital Universitario Central de Asturias, Oviedo, Spain. FAU - Carretero, Julian AU - Carretero J AD - Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, Spain. FAU - Condom, Enric AU - Condom E AD - Pathology Department, Bellvitge Hospital, Hospitalet de Llobregat, Barcelona, Spain. FAU - Vidal, Agustin AU - Vidal A AD - Pathology Department, Bellvitge Hospital, Hospitalet de Llobregat, Barcelona, Spain. FAU - Sidransky, David AU - Sidransky D AD - Departments of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland. FAU - Villanueva, Alberto AU - Villanueva A AD - Translational Research Laboratory, Catalan Institute of Oncology (ICO)-IDIBELL, Barcelona, Spain. FAU - Roz, Luca AU - Roz L AD - Tumor Genomics Unit, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy. FAU - Brambilla, Elisabeth AU - Brambilla E AD - Department of Pathology, Institut Albert Bonniot, INSERM U823, University Joseph Fourier, CHU, Grenoble Hopital Michallon, Grenoble, France. FAU - Savola, Suvi AU - Savola S AD - MRC-Holland, Willem Schoutenstraat, the Netherlands. FAU - Sanchez-Cespedes, Montse AU - Sanchez-Cespedes M AD - Genes and Cancer Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain. mscespedes@idibell.cat. LA - eng GR - P30 CA006973/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Cell Cycle Proteins) RN - 0 (Membrane Proteins) RN - 0 (PARD3 protein, human) RN - 0 (RAC1 protein, human) RN - 0 (STAT3 Transcription Factor) RN - 0 (STAT3 protein, human) RN - EC 2.7.11.13 (Protein Kinase C) RN - EC 3.6.5.2 (rac1 GTP-Binding Protein) SB - IM MH - Adaptor Proteins, Signal Transducing MH - Animals MH - Base Sequence MH - Carcinoma, Squamous Cell/*metabolism/secondary MH - Cell Cycle Proteins/*genetics/metabolism MH - Cell Line, Tumor MH - Cell Movement MH - Cell Proliferation MH - Humans MH - Liver Neoplasms/*metabolism/secondary MH - Lung Neoplasms/*metabolism/secondary MH - Membrane Proteins/*genetics/metabolism MH - Mice, Nude MH - Mutation MH - Neoplasm Invasiveness MH - Neoplasm Transplantation MH - Protein Kinase C/metabolism MH - STAT3 Transcription Factor/*metabolism MH - Sequence Analysis, DNA MH - Transcriptome MH - rac1 GTP-Binding Protein/metabolism PMC - PMC4612637 MID - NIHMS725260 COIS- Disclosure of Potential Conflicts of Interest No potential conflicts of interest were disclosed. EDAT- 2015/04/04 06:00 MHDA- 2016/01/24 06:00 PMCR- 2015/10/20 CRDT- 2015/04/03 06:00 PHST- 2015/04/03 06:00 [entrez] PHST- 2015/04/04 06:00 [pubmed] PHST- 2016/01/24 06:00 [medline] PHST- 2015/10/20 00:00 [pmc-release] AID - 75/7/1287 [pii] AID - 10.1158/0008-5472.CAN-14-2444 [doi] PST - ppublish SO - Cancer Res. 2015 Apr 1;75(7):1287-97. doi: 10.1158/0008-5472.CAN-14-2444.