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O-GlcNAcylation on Rab3A attenuates its effects on mitochondrial oxidative phosphorylation and metastasis in hepatocellular carcinoma. Cell Death Dis 2018; 9:970. [PMID: 30237463 PMCID: PMC6148238 DOI: 10.1038/s41419-018-0961-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 08/07/2018] [Accepted: 08/20/2018] [Indexed: 12/13/2022]
Abstract
Rab3A is a small Ras-like GTPase critical for membrane traffic. Although the functions of Rab3A have been reported in several cancers, the roles of Rab3A in hepatocellular carcinoma (HCC) have never been determined. To investigate the potential roles of Rab3A in HCC progression, we first determined Rab3A levels in HCC tissues and observed upregulated mRNA and protein levels of Rab3A in most tumor tissues. However, in vitro data showed that decreasing Rab3A in most HCC cell lines conferred no significant effects and overexpressing Rab3A in PLC/PRF/5 cells even inhibited migration and invasion. Meanwhile, the upregulation of Rab3A in HCC patients did not correlate with metastasis or overall survival of HCC patients. These contradict data suggested that Rab3A might act as metastatic suppressor and its effects might be attenuated in most HCC cells. Further experiments revealed that O-GlcNAcylation on Rab3A was key for attenuating Rab3A-mediated effects by regulating its GTP-binding activity, and verified the effects of Rab3A and its aberrant O-GlcNAcylation on HCC metastasis in vitro and in vivo. We also found that Rab3A and its O-GlcNAcylation had opposite roles in mitochondria oxidative phosphorylation (mtOXPHOS), and their functions on HCC metastasis were partially depended on their effects on metabolic reprogramming.
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Ito T, Matsubara D, Tanaka I, Makiya K, Tanei ZI, Kumagai Y, Shiu SJ, Nakaoka HJ, Ishikawa S, Isagawa T, Morikawa T, Shinozaki-Ushiku A, Goto Y, Nakano T, Tsuchiya T, Tsubochi H, Komura D, Aburatani H, Dobashi Y, Nakajima J, Endo S, Fukayama M, Sekido Y, Niki T, Murakami Y. Loss of YAP1 defines neuroendocrine differentiation of lung tumors. Cancer Sci 2016; 107:1527-1538. [PMID: 27418196 PMCID: PMC5084673 DOI: 10.1111/cas.13013] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/21/2016] [Accepted: 07/12/2016] [Indexed: 01/24/2023] Open
Abstract
YAP1, the main Hippo pathway effector, is a potent oncogene and is overexpressed in non‐small‐cell lung cancer (NSCLC); however, the YAP1 expression pattern in small‐cell lung cancer (SCLC) has not yet been elucidated in detail. We report that the loss of YAP1 is a special feature of high‐grade neuroendocrine lung tumors. A hierarchical cluster analysis of 15 high‐grade neuroendocrine tumor cell lines containing 14 SCLC cell lines that depended on the genes of Hippo pathway molecules and neuroendocrine markers clearly classified these lines into two groups: the YAP1‐negative and neuroendocrine marker‐positive group (n = 11), and the YAP1‐positive and neuroendocrine marker‐negative group (n = 4). Among the 41 NSCLC cell lines examined, the loss of YAP1 was only observed in one cell line showing the strong expression of neuroendocrine markers. Immunostaining for YAP1, using the sections of 189 NSCLC, 41 SCLC, and 30 large cell neuroendocrine carcinoma (LCNEC) cases, revealed that the loss of YAP1 was common in SCLC (40/41, 98%) and LCNEC (18/30, 60%), but was rare in NSCLC (6/189, 3%). Among the SCLC and LCNEC cases tested, the loss of YAP1 correlated with the expression of neuroendocrine markers, and a survival analysis revealed that YAP1‐negative cases were more chemosensitive than YAP1‐positive cases. Chemosensitivity test for cisplatin using YAP1‐positive/YAP1‐negative SCLC cell lines also showed compatible results. YAP1‐sh‐mediated knockdown induced the neuroendocrine marker RAB3a, which suggested the possible involvement of YAP1 in the regulation of neuroendocrine differentiation. Thus, we showed that the loss of YAP1 has potential as a clinical marker for predicting neuroendocrine features and chemosensitivity.
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Affiliation(s)
- Takeshi Ito
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Daisuke Matsubara
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan. .,Department of Integrative Pathology, Jichi Medical University, Tochigi, Japan.
| | - Ichidai Tanaka
- Division of Molecular Oncology, Aichi Cancer Center Research Institute, Aichi, Japan
| | - Kanae Makiya
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Zen-Ichi Tanei
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Yuki Kumagai
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Shu-Jen Shiu
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Hiroki J Nakaoka
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Shumpei Ishikawa
- Department of Genomic Pathology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Isagawa
- Department of Genomic Pathology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - Teppei Morikawa
- Department of Human Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Aya Shinozaki-Ushiku
- Department of Human Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Yasushi Goto
- Department of Respiratory Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Tomoyuki Nakano
- Department of Thoracic Surgery, Jichi Medical University, Tochigi, Japan
| | | | - Hiroyoshi Tsubochi
- Department of Thoracic Surgery, Jichi Medical University Saitama Medical Center, Saitama, Japan
| | - Daisuke Komura
- Division of Genome Science, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan
| | - Hiroyuki Aburatani
- Division of Genome Science, Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan
| | - Yoh Dobashi
- Department of Pathology, Jichi Medical University Saitama Medical Center, Saitama, Japan
| | - Jun Nakajima
- Department of Thoracic Surgery, University of Tokyo, Tokyo, Japan
| | - Shunsuke Endo
- Department of Thoracic Surgery, Jichi Medical University, Tochigi, Japan
| | - Masashi Fukayama
- Department of Human Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Yoshitaka Sekido
- Division of Molecular Oncology, Aichi Cancer Center Research Institute, Aichi, Japan
| | - Toshiro Niki
- Department of Integrative Pathology, Jichi Medical University, Tochigi, Japan
| | - Yoshinori Murakami
- Molecular Pathology Laboratory, Institute of Medical Science, University of Tokyo, Tokyo, Japan
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Chia WJ, Tang BL. Emerging roles for Rab family GTPases in human cancer. Biochim Biophys Acta Rev Cancer 2009; 1795:110-6. [PMID: 19425190 DOI: 10.1016/j.bbcan.2008.10.001] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Member of the Ras-associated binding (Rab) family of small GTPases function as molecular switches regulating vesicular transport in eukaryotes cells. Their pathophysiological roles in human malignancies are less well-known compared to members of Ras and Rho families. Several members of the Rab family have, however, been shown to be aberrantly expressed in various cancer tissues. Recent findings have also revealed , in particular, Rab25 as a determinant of tumor progression and aggressiveness of epithelial cancers. Rab25 associates with alpha5beta1 integrin, and enhances tumor cell invasion by directing the localization of integrin-containing vesicles to the leading edge of matrix invading pseudopodia. We summarized here recent integrin on Rab25 and other Rabs implicated to be involved in a variety of human cancers, and discussed plausible mechanisms of how dysregulation of Rab expression could be tumorigenic or tumor suppressive.
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Affiliation(s)
- Wan Jie Chia
- Department of Biochemistry,Yong Loo Lin School of Medicine, national University of Singapore, 8 Medical Drive, Singapore 117597, Singapore
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Müller-Pillasch F, Zimmerhackl F, Lacher U, Schultz N, Hameister H, Varga G, Friess H, Büchler M, Adler G, Gress TM. Cloning of novel transcripts of the human guanine-nucleotide-exchange factor Mss4: in situ chromosomal mapping and expression in pancreatic cancer. Genomics 1997; 46:389-96. [PMID: 9441742 DOI: 10.1006/geno.1997.5049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In a previous large-scale analysis of gene expression in pancreatic cancer using gridded arrays of cDNA libraries and differential hybridizations, a gene that was a homolog to human mss4 was identified. Mss4 is a guanine-nucleotide-exchange factor for the Sec4/ Ypt1/Rab family of small GTP-binding proteins involved in the regulation of intracellular vesicular transport. By fluorescence in situ hybridization the human mss4 gene was assigned to chromosome 1q32-q41. Northern blot analysis revealed that three mss4 mRNA species are transcribed in human tissues of 780, 1200, and 2800 bp in length, respectively. Cloning and sequencing of the human mss4 transcripts from a pancreatic cancer cDNA library revealed that these mRNA species differ in the length of the 3-untranslated region and are probably due to the alternate use of polyadenylation sites. All mRNA species were detected at moderate to high levels in pancreatic cancer cell lines and were overexpressed in pancreatic cancer tissue compared to both normal pancreas and chronic pancreatitis tissue. However, the 1200-bp transcript was the Mss4 mRNA species with the highest level of expression in more than 50% of tumor cells and tissues. High levels of expression were found as well in other human tumor tissues. Mss4 as guanine-exchange factor required in the regulation of intracellular transport may be of importance for the function and growth of human tumor cells. However, the precise role of mss4 in human tumor cells is unknown and remains to be elucidated.
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