PMID- 21245096 OWN - NLM STAT- MEDLINE DCOM- 20110502 LR - 20220321 IS - 1538-7445 (Electronic) IS - 0008-5472 (Linking) VI - 71 IP - 3 DP - 2011 Feb 1 TI - LATS2 is a tumor suppressor gene of malignant mesothelioma. PG - 873-83 LID - 10.1158/0008-5472.CAN-10-2164 [doi] AB - Malignant mesothelioma (MM) is an aggressive neoplasm associated with asbestos exposure. We carried out genome-wide array-based comparative genomic hybridization analysis with 14 MM cell lines. Three cell lines showed overlapping homozygous deletion at chromosome 13q12, which harbored the LATS2 (large tumor suppressor homolog 2) gene. With 6 other MM cell lines and 25 MM tumors, we found 10 inactivating homozygous deletions or mutations of LATS2 among 45 MMs. LATS2 encodes a serine/threonine kinase, a component of the Hippo tumor-suppressive signaling pathway, and we transduced LATS2 in MM cells with its mutation. Transduction of LATS2 inactivated oncoprotein YAP, a transcriptional coactivator, via phosphorylation, and inhibited MM cell growth. We also analyzed LATS2 immunohistochemically and found that 13 of 45 MM tumors had low expression of LATS2. Because NF2 is genetically mutated in 40% to 50% of MM, our data indicate that Hippo pathway dysregulation is frequent in MM cells with inactivation of LATS2 or an upstream regulator of this pathway, Merlin, which is encoded by NF2. Thus, our results suggest that the inactivation of LATS2 is one of the key mechanisms for constitutive activation of YAP, which induces deregulation of MM cell proliferation. FAU - Murakami, Hideki AU - Murakami H AD - Division of Molecular Oncology, Aichi Cancer Center Research Institute, Nagoya, Japan. FAU - Mizuno, Tetsuya AU - Mizuno T FAU - Taniguchi, Tetsuo AU - Taniguchi T FAU - Fujii, Makiko AU - Fujii M FAU - Ishiguro, Futoshi AU - Ishiguro F FAU - Fukui, Takayuki AU - Fukui T FAU - Akatsuka, Shinya AU - Akatsuka S FAU - Horio, Yoshitsugu AU - Horio Y FAU - Hida, Toyoaki AU - Hida T FAU - Kondo, Yutaka AU - Kondo Y FAU - Toyokuni, Shinya AU - Toyokuni S FAU - Osada, Hirotaka AU - Osada H FAU - Sekido, Yoshitaka AU - Sekido Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110118 PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Cell Cycle Proteins) RN - 0 (Neurofibromin 2) RN - 0 (SAV1 protein, human) RN - 0 (Tumor Suppressor Proteins) RN - EC 2.7.1.11 (LATS2 protein, human) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) SB - IM MH - Cell Cycle Proteins/genetics MH - Cell Growth Processes/genetics MH - Cell Line, Tumor MH - Chromosomes, Human, Pair 13 MH - Comparative Genomic Hybridization MH - *Gene Deletion MH - Gene Expression Regulation, Neoplastic MH - Gene Silencing MH - *Genes, Tumor Suppressor MH - Humans MH - Immunohistochemistry MH - Mesothelioma/*genetics/pathology MH - Neurofibromin 2/genetics MH - Protein Serine-Threonine Kinases/*genetics MH - Transduction, Genetic MH - Tumor Suppressor Proteins/*genetics EDAT- 2011/01/20 06:00 MHDA- 2011/05/03 06:00 CRDT- 2011/01/20 06:00 PHST- 2011/01/20 06:00 [entrez] PHST- 2011/01/20 06:00 [pubmed] PHST- 2011/05/03 06:00 [medline] AID - 0008-5472.CAN-10-2164 [pii] AID - 10.1158/0008-5472.CAN-10-2164 [doi] PST - ppublish SO - Cancer Res. 2011 Feb 1;71(3):873-83. doi: 10.1158/0008-5472.CAN-10-2164. Epub 2011 Jan 18.