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Shi M, Yang S, Huang X, Wang S, Li W, Yun J, Lu C, Yang Y, Cai C, Gao P, Guo X, Li B, Cao G. Caveolae-associated protein 3 promotes adipogenic differentiation of porcine preadipocytes by promoting extracellular signal-regulated kinase phosphorylation. Anim Sci J 2023; 94:e13822. [PMID: 36922373 DOI: 10.1111/asj.13822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 02/03/2023] [Accepted: 02/16/2023] [Indexed: 03/18/2023]
Abstract
Fat deposition is one of the key factors affecting the economic development of pig husbandry. The aim of this study was to investigate the expression characteristics of caveolae-associated protein 3 (CAVIN3) and to elucidate its effect and mechanism on adipogenic differentiation of porcine preadipocytes. Cell transfection, quantitative reverse transcription polymerase chain reaction (qRT-PCR), western blot, and oil red O staining were used to detect the effect of CAVIN3 on the differentiation of porcine preadipocytes. The results showed that CAVIN3 was expressed in various tissues, with higher expression in adipose tissue, differentially expressed during cell adipogenic differentiation, and mainly distributed in the cytoplasm. Functional studies showed that, after CAVIN3 interference in preadipocytes, the expression of adipogenic factors and the content of lipid droplets were significantly decreased (p < 0.05). The results were reversed after CAVIN3 was overexpressed. The mechanism research showed that LY3214996 inhibited the extracellular signal-regulated kinase (ERK) phosphorylation and further inhibited lipogenic factors expression. Overexpression of CAVIN3 attenuates the inhibitory effect of LY3214996 on ERK phosphorylation and attenuates its inhibitory effect on adipogenic differentiation. Therefore, this study demonstrated that CAVIN3 promotes the differentiation of porcine preadipocytes by promoting ERK phosphorylation. The present study can lay a theoretical foundation for further studying the molecular mechanism of porcine fat deposition.
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Affiliation(s)
- Mingyue Shi
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Shuai Yang
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Xiaoyu Huang
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Shouyuan Wang
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Wenxia Li
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Jiale Yun
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Chang Lu
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Yang Yang
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Chunbo Cai
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Pengfei Gao
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Xiaohong Guo
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Bugao Li
- College of Animal Science, Shanxi Agricultural University, Taigu, China
| | - Guoqing Cao
- College of Animal Science, Shanxi Agricultural University, Taigu, China
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2
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LI J, QI L, ZHANG M, YAO C, FENG J, ZHENG Z, CHEN C, DUAN S, QI Y. PRKCDBP Methylation is a Potential and Promising Candidate Biomarker for Non-small Cell Lung Cancer. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2022; 25:78-85. [PMID: 35224960 PMCID: PMC8913286 DOI: 10.3779/j.issn.1009-3419.2022.102.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND The occurrence and development of lung cancer are closely linked to epigenetic modification. Abnormal DNA methylation in the CpG island region of genes has been found in many cancers. Protein kinase C delta binding protein (PRKCDBP) is a potential tumor suppressor and its epigenetic changes are found in many human malignancies. This study investigated the possibility of PRKCDBP methylation as a potential biomarker for non-small cell lung cancer (NSCLC). METHODS We measured the methylation levels of PRKCDBP in the three groups of NSCLC tissues. Promoter activity was measured by the dual luciferase assay, with 5'-aza-deoxycytidine to examine the effect of demethylation on the expression level of PRKCDBP. RESULTS The methylation levels of PRKCDBP in tumor tissues and 3 cm para-tumor were higher than those of distant (>10 cm) non-tumor tissues. Receiver operating characteristic (ROC) curve analysis between tumor tissues and distant non-tumor tissues showed that the area under the line (AUC) was 0.717. Dual luciferase experiment confirmed that the promoter region was able to promote gene expression. Meanwhile, in vitro methylation of the fragment (PRKCDBP_Me) could significantly reduce the promoter activity of the fragment. Demethylation of 5'-aza-deoxycytidine in lung cancer cell lines A549 and H1299 showed a significant up-regulation of PRKCDBP mRNA levels. CONCLUSIONS PRKCDBP methylation is a potential and promising candidate biomarker for non-small cell lung cancer.
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Affiliation(s)
- Jing LI
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Lin QI
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Mingfang ZHANG
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Caiyun YAO
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Jinan FENG
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Zhonghua ZHENG
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Chujia CHEN
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Shiwei DUAN
- Medical Genetics Center, School of Medicine, Ningbo University, Ningbo 315211, China
| | - Yuanlin QI
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China,Yuanlin QI, E-mail:
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3
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McMahon KA, Stroud DA, Gambin Y, Tillu V, Bastiani M, Sierecki E, Polinkovsky ME, Hall TE, Gomez GA, Wu Y, Parat MO, Martel N, Lo HP, Khanna KK, Alexandrov K, Daly R, Yap A, Ryan MT, Parton RG. Cavin3 released from caveolae interacts with BRCA1 to regulate the cellular stress response. eLife 2021; 10:61407. [PMID: 34142659 PMCID: PMC8279762 DOI: 10.7554/elife.61407] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 06/11/2021] [Indexed: 12/13/2022] Open
Abstract
Caveolae-associated protein 3 (cavin3) is inactivated in most cancers. We characterized how cavin3 affects the cellular proteome using genome-edited cells together with label-free quantitative proteomics. These studies revealed a prominent role for cavin3 in DNA repair, with BRCA1 and BRCA1 A-complex components being downregulated on cavin3 deletion. Cellular and cell-free expression assays revealed a direct interaction between BRCA1 and cavin3 that occurs when cavin3 is released from caveolae that are disassembled in response to UV and mechanical stress. Overexpression and RNAi-depletion revealed that cavin3 sensitized various cancer cells to UV-induced apoptosis. Supporting a role in DNA repair, cavin3-deficient cells were sensitive to PARP inhibition, where concomitant depletion of 53BP1 restored BRCA1-dependent sensitivity to PARP inhibition. We conclude that cavin3 functions together with BRCA1 in multiple cancer-related pathways. The loss of cavin3 function may provide tumor cell survival by attenuating apoptotic sensitivity and hindering DNA repair under chronic stress conditions.
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Affiliation(s)
- Kerrie-Ann McMahon
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - David A Stroud
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Australia
| | - Yann Gambin
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Vikas Tillu
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Michele Bastiani
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Emma Sierecki
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Mark E Polinkovsky
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Thomas E Hall
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Guillermo A Gomez
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Yeping Wu
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Marie-Odile Parat
- School of Pharmacy, The University of Queensland, Woolloongabba, Australia
| | - Nick Martel
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Harriet P Lo
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Kum Kum Khanna
- Signal Transduction Laboratory, QIMR Berghofer Medical Research Institute, Queensland, Australia
| | - Kirill Alexandrov
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Roger Daly
- Monash Biomedicine Discovery Institute, Department of Biochemistry & Molecular Biology, Monash University, Melbourne, Australia
| | - Alpha Yap
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | - Michael T Ryan
- Monash Biomedicine Discovery Institute, Department of Biochemistry & Molecular Biology, Monash University, Melbourne, Australia
| | - Robert G Parton
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia.,Centre for Microscopy and Microanalysis, The University of Queensland, Queensland, Australia
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4
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An X, Lin X, Yang A, Jiang Q, Geng B, Huang M, Lu J, Xiang Z, Yuan Z, Wang S, Shi Y, Zhu H. Cavin3 Suppresses Breast Cancer Metastasis via Inhibiting AKT Pathway. Front Pharmacol 2020; 11:01228. [PMID: 33101009 PMCID: PMC7556234 DOI: 10.3389/fphar.2020.01228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/28/2020] [Indexed: 01/08/2023] Open
Abstract
Objective Cavin3 is a putative tumor suppressor protein. However, its molecular action on tumor regulation is largely unknown. The aim of the current study is to explore the implication of cavin3 alteration, its clinical significance, and any potential molecular mechanisms in the regulation of breast cancer (BC). Methods TCGA (The Cancer Genome Atlas) and GTEx (Genotype-Tissue Expression) data bases, and 17 freshly paired BC and adjacent normal tissues were analyzed for mRNA levels of Cavin3. Furthermore, cavin3 protein expression from 407 primary BC samples were assessed by immunohistochemistry (IHC) and measured by H-score. The clinical significance of cavin3 expression was explored by Kaplan-Meier analysis and the Cox regression method. In vitro biological assays were performed to elucidate the function and underlying mechanisms of cavin 3 in BC cell lines. Results Cavin3 mRNA was dramatically down-regulated in BC compared with the negative control. The median H-score of cavin3 protein by IHC was 50 (range 0-270). There were 232 (57%) and 175 (43%) cases scored as low (H-score≤50) and high (H-score >50) levels of cavin3, respectively. Low cavin3 was correlated with a higher T and N stage, and worse distant metastasis-free survival (DMFS) and overall survival (OS). Multivariate survival analysis revealed low cavin3 was an independent fact for worse DMFS. In BC cells, an overexpression of cavin3 could inhibit cell migration and invasion, and significantly decreased the level of p-Akt. Knockout of cavin3, meanwhile, promoted cell invasion ability and increased the level of p-AKT. Conclusion Cavin3 expression is significantly lower in BC and is correlated with distant metastasis and worse survival. Cavin3 functions as a metastasis suppressor via inhibiting the AKT pathway, suggesting cavin3 as a potential prognostic biomarker and a target for BC treatment.
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Affiliation(s)
- Xin An
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China.,Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Xi Lin
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Departments of Ultrasound, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Anli Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Breast Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Qiwei Jiang
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Bingchuan Geng
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Mayan Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jiabin Lu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhicheng Xiang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Zhongyu Yuan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Shusen Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yanxia Shi
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.,Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Hua Zhu
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States
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5
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Rezaei S, Hosseinpourfeizi MA, Moaddab Y, Safaralizadeh R. Contribution of DNA methylation and EZH2 in SRBC down-regulation in gastric cancer. Mol Biol Rep 2020; 47:5721-5727. [PMID: 32676814 DOI: 10.1007/s11033-020-05619-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 06/22/2020] [Indexed: 12/16/2022]
Abstract
Gastric cancer (GC), a high mortality malignancy, is induced by genetic and epigenetic factors. DNA and histone methylation play critical roles in tumor suppressor genes inactivation. SRBC (serum deprivation response factor-related gene product that binds to the c-kinase), suggested as a tumor suppressor gene, participates in apoptosis, tumor chemoresistance and DNA damage response and is repressed in various cancers. Inspecting the mechanisms underlying SRBC suppression is important for cancer treatments. We investigated SRBC promoter DNA methylation status and expression of SRBC and EZH2 histone methyltrasferase in gastric cancer. Also, we surveyed SRBC expression after 5-azacitidine and UNC1999 treatments of AGS cell line. In current work, we used gastric adenocarcinoma tissues, marginal samples and normal gastric biopsies. DNA methylation was detected by Methylation- Specific PCR and mRNA expression was measured by Real-Time PCR. SRBC promoter methylation analysis, showed fully and partial methylated versions that were associated with patient's age (p = 0.001). SRBC expression significantly decreased in GC compare with marginal and normal samples (p-value < 0.001). EZH2 showed remarkable up-regulation in GC than controls and demonstrated a strong inverse correlation with SRBC expression (r = - 0.69). Restoration of SRBC expression was observed after 5-azacitidine and UNC1999 applications with a remarkable increase by combinational treatment. We showed that EZH2 plays role in SRBC silencing in addition to DNA methylation. Our study, suggests that DNA methylation and EZH2 are involved in SRBC silencing and their inhibitors can be considered in cancer treatment investigations to overcome chemoresistance induced by SRBC inactivation.
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Affiliation(s)
- Shiva Rezaei
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | | | - Yaghoub Moaddab
- Liver and Gastroenterology Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Safaralizadeh
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran.
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6
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Park PJ, Kim ST. Caveolae-Associated Protein 3 (Cavin-3) Influences Adipogenesis via TACE-Mediated Pref-1 Shedding. Int J Mol Sci 2020; 21:ijms21145000. [PMID: 32679831 PMCID: PMC7404391 DOI: 10.3390/ijms21145000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/06/2020] [Accepted: 07/13/2020] [Indexed: 12/16/2022] Open
Abstract
Abnormal adipogenesis regulation is accompanied by a variety of metabolic dysfunctions and disorders. Caveolae play an important role in the regulation of fat production, modulated by caveolae-associated proteins (Cavin-1 to 4). Here, we investigated the role of Cavin-3 in lipogenesis and adipocyte differentiation, as the regulatory functions and roles of Cavin-3 in adipocytes are unknown. A Cavin-3 knockdown/overexpression stable cell line was established, and adipogenesis-related gene and protein expression changes were investigated by real-time quantitative PCR and Western blot analysis, respectively. Additionally, confocal immune-fluorescence microscopy was used to verify the intracellular position of the relevant factors. The results showed that Cavin-3 mRNA and protein expression were elevated, along with physiological factors such as lipid droplet formation, during adipogenesis. Cavin-3 silencing resulted in retarded adipocyte differentiation, and its overexpression accelerated this process. Furthermore, Cavin-3 knockdown resulted in decreased expression of adipogenesis-related genes, such as PPAR-γ, FAS, aP2, and Adipoq, whereas preadipocyte factor-1 (Pref-1) was markedly increased during adipocyte maturation. Overall, Cavin-3 influences caveolar stability and modulates the tumor necrosis factor-alpha-converting enzyme (TACE)-mediated Pref-1 shedding process in both mouse and human adipocytes. The Cavin-3-dependent shedding mechanism appears to be an important process in adipocyte maturation, providing a potential therapeutic target for obesity-related disorders.
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Affiliation(s)
- Phil June Park
- Bioscience Laboratory, AMOREPACIFIC R&D Center, 1920 Yonggu-daero, Giheung-gu, Yongin-si, Gyeonggi-do 17074, Korea
- Correspondence: (P.J.P.); (S.T.K.); Tel.: +82-31-280-5639 (P.J.P.); +82-55-320-4038 (S.T.K.)
| | - Sung Tae Kim
- Department of Pharmaceutical Engineering, Inje University, 197 Inje-ro, Gimhae-si, Gyeongsangnam-do 50834, Korea
- Correspondence: (P.J.P.); (S.T.K.); Tel.: +82-31-280-5639 (P.J.P.); +82-55-320-4038 (S.T.K.)
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7
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Identification of intracellular cavin target proteins reveals cavin-PP1alpha interactions regulate apoptosis. Nat Commun 2019; 10:3279. [PMID: 31332168 PMCID: PMC6646387 DOI: 10.1038/s41467-019-11111-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 06/14/2019] [Indexed: 12/20/2022] Open
Abstract
Caveolae are specialized domains of the plasma membrane. Formation of these invaginations is dependent on the expression of Caveolin-1 or -3 and proteins of the cavin family. In response to stress, caveolae disassemble and cavins are released from caveolae, allowing cavins to potentially interact with intracellular targets. Here, we describe the intracellular (non-plasma membrane) cavin interactome using biotin affinity proteomics and mass spectrometry. We validate 47 potential cavin-interactor proteins using a cell-free expression system and protein-protein binding assays. These data, together with pathway analyses, reveal unknown roles for cavin proteins in metabolism and stress signaling. We validated the interaction between one candidate interactor protein, protein phosphatase 1 alpha (PP1α), and Cavin-1 and -3 and show that UV treatment causes release of Cavin3 from caveolae allowing interaction with, and inhibition of, PP1α. This interaction increases H2AX phosphorylation to stimulate apoptosis, identifying a pro-apoptotic signaling pathway from surface caveolae to the nucleus.
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8
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Yamaguchi T, Hayashi M, Ida L, Yamamoto M, Lu C, Kajino T, Cheng J, Nakatochi M, Isomura H, Yamazaki M, Suzuki M, Fujimoto T, Takahashi T. ROR1-CAVIN3 interaction required for caveolae-dependent endocytosis and pro-survival signaling in lung adenocarcinoma. Oncogene 2019; 38:5142-5157. [PMID: 30894682 DOI: 10.1038/s41388-019-0785-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/10/2019] [Accepted: 03/03/2019] [Indexed: 12/11/2022]
Abstract
The receptor tyrosine kinase-like orphan receptor 1 (ROR1) is a transcriptional target of the lineage-survival oncogene NKX2-1/TTF-1 in lung adenocarcinomas. In addition to its kinase-dependent role, ROR1 functions as a scaffold protein to facilitate interaction between caveolin-1 (CAV1) and CAVIN1, and consequently maintains caveolae formation, which in turn sustains pro-survival signaling toward AKT from multiple receptor tyrosine kinases (RTKs), including epidermal growth factor receptor (EGFR), MET (proto-oncogene, receptor tyrosine kinase), and IGF-IR (insulin-like growth factor receptor 1). Therefore, ROR1 is an attractive target for overcoming EGFR-TKI resistance due to various mechanisms such as EGFR T790M double mutation and bypass signaling from other RTKs. Here, we report that ROR1 possesses a novel scaffold function indispensable for efficient caveolae-dependent endocytosis. CAVIN3 was found to bind with ROR1 at a site distinct from sites for CAV1 and CAVIN1, a novel function required for proper CAVIN3 subcellular localization and caveolae-dependent endocytosis, but not caveolae formation itself. Furthermore, evidence of a mechanistic link between ROR1-CAVIN3 interaction and consequential caveolae trafficking, which was found to utilize a binding site distinct from those for ROR1 interactions with CAV1 and CAVIN1, with RTK-mediated pro-survival signaling towards AKT in early endosomes in lung adenocarcinoma cells was also obtained. The present findings warrant future study to enable development of novel therapeutic strategies for inhibiting the multifaceted scaffold functions of ROR1 in order to reduce the intolerable death toll from this devastating cancer.
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Affiliation(s)
- Tomoya Yamaguchi
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan.,Department of Cancer Biology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Center for Metabolic Regulation of Healthy Aging, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Miyu Hayashi
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Lisa Ida
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Masatoshi Yamamoto
- Department of Cancer Biology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.,Center for Metabolic Regulation of Healthy Aging, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Can Lu
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Taisuke Kajino
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan.,Division of Molecular Therapeutics, Aichi Cancer Center Research Institute, 1-1 Kanokoden, Chikusa-ku, Nagoya, 464-8681, Japan
| | - Jinglei Cheng
- Department of Anatomy and Molecular Cell Biology, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Masahiro Nakatochi
- Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, 466-8550, Japan
| | - Hisanori Isomura
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan.,Division of Molecular Therapeutics, Aichi Cancer Center Research Institute, 1-1 Kanokoden, Chikusa-ku, Nagoya, 464-8681, Japan
| | - Masaya Yamazaki
- Department of Cancer Biology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Motoshi Suzuki
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Toyoshi Fujimoto
- Department of Anatomy and Molecular Cell Biology, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Takashi Takahashi
- Division of Molecular Carcinogenesis, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan. .,Aichi Cancer Center, 1-1Kanokoden, Chikusa-ku, Nagoya, 464-8681, Japan.
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9
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Gao D, Herman JG, Guo M. The clinical value of aberrant epigenetic changes of DNA damage repair genes in human cancer. Oncotarget 2018; 7:37331-37346. [PMID: 26967246 PMCID: PMC5095080 DOI: 10.18632/oncotarget.7949] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 02/20/2016] [Indexed: 12/22/2022] Open
Abstract
The stability and integrity of the human genome are maintained by the DNA damage repair (DDR) system. Unrepaired DNA damage is a major source of potentially mutagenic lesions that drive carcinogenesis. In addition to gene mutation, DNA methylation occurs more frequently in DDR genes in human cancer. Thus, DNA methylation may play more important roles in DNA damage repair genes to drive carcinogenesis. Aberrant methylation patterns in DNA damage repair genes may serve as predictive, diagnostic, prognostic and chemosensitive markers of human cancer. MGMT methylation is a marker for poor prognosis in human glioma, while, MGMT methylation is a sensitive marker of glioma cells to alkylating agents. Aberrant epigenetic changes in DNA damage repair genes may serve as therapeutic targets. Treatment of MLH1-methylated colon cancer cell lines with the demethylating agent 5′-aza-2′-deoxycytidine induces the expression of MLH1 and sensitizes cancer cells to 5-fluorouracil. Synthetic lethality is a more exciting approach in patients with DDR defects. PARP inhibitors are the most effective anticancer reagents in BRCA-deficient cancer cells.
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Affiliation(s)
- Dan Gao
- Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, Beijing, China.,Medical College of NanKai University, Tianjin, China
| | - James G Herman
- The Hillman Cancer Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Mingzhou Guo
- Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, Beijing, China
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10
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Rahat B, Thakur S, Hamid A, Bagga R, Kaur J. Association of aberrant methylation at promoter regions of tumor suppressor genes with placental pathologies. Epigenomics 2016; 8:767-87. [DOI: 10.2217/epi.16.7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Aim: The resemblance between invasive behavior of cancer cells and placental trophoblasts and the role of aberrant epigenetic regulation in cancer development is well known. Methods: We analyzed the role of promoter region CpG-methylation and H3K9/27me3 of tumor suppressor genes in normal and pathological pregnancies and utilized their CpG-methylation data to search for fetal DNA epigenetic marker in maternal blood. Results: CpG and H3K9/27-methylation associated decreased expression of RASSF1A and APC and increased expression of P16, RB1 and PRKCDBP was observed with advancing normal gestation. Gestational trophoblastic diseases and preeclampsia revealed gene-specific epigenetic deregulation of candidate tumor suppressor genes. Furthermore, APC and PRKCDBP showed the potential to act as fetal DNA epigenetic markers, similar to RASSF1A. Conclusion: Deregulation of methylation of tumor suppressor genes contributes to the development of preeclampsia and gestational trophoblastic diseases. APC and PRKCDBP may act as fetal DNA epigenetic markers for prenatal diagnosis.
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Affiliation(s)
- Beenish Rahat
- Department of Biochemistry, Postgraduate Institute of Medical Education & Research, Chandigarh 160012, India
| | - Shilpa Thakur
- Department of Biochemistry, Postgraduate Institute of Medical Education & Research, Chandigarh 160012, India
| | - Abid Hamid
- Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu 180001, India
| | - Rashmi Bagga
- Department of Obstetrics & Gynecology, Postgraduate Institute of Medical Education & Research, Chandigarh 160012, India
| | - Jyotdeep Kaur
- Department of Biochemistry, Postgraduate Institute of Medical Education & Research, Chandigarh 160012, India
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Low JY, D. Nicholson H. The up-stream regulation of polymerase-1 and transcript release factor(PTRF/Cavin-1) in prostate cancer: an epigenetic analysis. AIMS MOLECULAR SCIENCE 2016. [DOI: 10.3934/molsci.2016.3.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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12
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Kim JW, Lee CK, Kim HJ, Shim JJ, Jang JY, Dong SH, Kim BH, Chang YW, Chi SG. Polymorphisms in PRKCDBP, a Transcriptional Target of TNF-α, Are Associated With Inflammatory Bowel Disease in Korean. Intest Res 2015; 13:242-9. [PMID: 26130999 PMCID: PMC4479739 DOI: 10.5217/ir.2015.13.3.242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 03/22/2015] [Accepted: 04/10/2015] [Indexed: 01/03/2023] Open
Abstract
Background/Aims Emerging data indicate that polymorphic sequence variations in the tumor necrosis factor alpha (TNF-α) gene may affect its production, and be associated with the risk of inflammatory bowel disease (IBD). PRKCDBP is a putative tumor suppressor gene and a transcriptional target of TNF-α. The aim of this case-control study is to explore the possible association of single nucleotide polymorphisms (SNPs) in PRKCDBP with the development of IBD in Koreans. Methods Genotyping analysis of four SNPs of PRKCDBP [rs35301211 (G210A), rs11544766 (G237C), rs12294600 (C797T), and rs1051992 (T507C)] was performed on 170 ulcerative colitis (UC),131 Crohn's disease (CD) patients, and 100 unrelated healthy controls using polymerase chain reaction and restriction fragment length polymorphism. Results Heterozygous configuration of three SNPs (G210A, G237C, and C797T) was very rare in both patients and healthy controls. However, allele frequencies of the T507C SNP showed a significant difference between UC patients and controls (P=0.037). The CC genotype of the T507C SNP was identified in 46.6% (61 of 131) of CD and 49.4% (84 of 170) of UC patients, but only in 33.0% (33 of 100) of healthy controls. Furthermore, CC homozygosity was more prevalent than TC heterozygosity in both CD and UC patients versus controls (P=0.016; gender-adjusted odds ratio [aOR], 2.16; 95% confidence interval [CI], 1.16-4.04 and P=0.009; aOR, 2.09; 95% CI, 1.193.64; respectively) Conclusions Our results suggest that the T507C SNP in PRKCDBP, a TNF-α-inducible gene, might be associated with susceptibility to IBD (particularly UC) development in Koreans.
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Affiliation(s)
- Jung-Wook Kim
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Chang Kyun Lee
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Hyo Jong Kim
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Jae-Jun Shim
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Jae Young Jang
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Seok Ho Dong
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Byung-Ho Kim
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Young Woon Chang
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
| | - Sung-Gil Chi
- School of Life Sciences and Biotechnology, Korea University, Seoul, Korea
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Li Y, Melnikov AA, Levenson V, Guerra E, Simeone P, Alberti S, Deng Y. A seven-gene CpG-island methylation panel predicts breast cancer progression. BMC Cancer 2015; 15:417. [PMID: 25986046 PMCID: PMC4438505 DOI: 10.1186/s12885-015-1412-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 05/01/2015] [Indexed: 12/31/2022] Open
Abstract
Background DNA methylation regulates gene expression, through the inhibition/activation of gene transcription of methylated/unmethylated genes. Hence, DNA methylation profiling can capture pivotal features of gene expression in cancer tissues from patients at the time of diagnosis. In this work, we analyzed a breast cancer case series, to identify DNA methylation determinants of metastatic versus non-metastatic tumors. Methods CpG-island methylation was evaluated on a 56-gene cancer-specific biomarker microarray in metastatic versus non-metastatic breast cancers in a multi-institutional case series of 123 breast cancer patients. Global statistical modeling and unsupervised hierarchical clustering were applied to identify a multi-gene binary classifier with high sensitivity and specificity. Network analysis was utilized to quantify the connectivity of the identified genes. Results Seven genes (BRCA1, DAPK1, MSH2, CDKN2A, PGR, PRKCDBP, RANKL) were found informative for prognosis of metastatic diffusion and were used to calculate classifier accuracy versus the entire data-set. Individual-gene performances showed sensitivities of 63–79 %, 53–84 % specificities, positive predictive values of 59–83 % and negative predictive values of 63–80 %. When modelled together, these seven genes reached a sensitivity of 93 %, 100 % specificity, a positive predictive value of 100 % and a negative predictive value of 93 %, with high statistical power. Unsupervised hierarchical clustering independently confirmed these findings, in close agreement with the accuracy measurements. Network analyses indicated tight interrelationship between the identified genes, suggesting this to be a functionally-coordinated module, linked to breast cancer progression. Conclusions Our findings identify CpG-island methylation profiles with deep impact on clinical outcome, paving the way for use as novel prognostic assays in clinical settings. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1412-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yan Li
- Rush University Medical Center, 653 W Congress Pkwy, Chicago, IL, 60612, USA.
| | | | - Victor Levenson
- US Biomarkers, Inc, 29 Buckingham Ln., Buffalo Grove, IL, 60089, USA. .,Currently at Center for Translational Research, Catholic Health Initiatives, Englewood, USA.
| | - Emanuela Guerra
- Unit of Cancer Pathology, CeSI, 'G. d'Annunzio' University Foundation, Via L. Polacchi 11, 66100, Chieti, Italy.
| | - Pasquale Simeone
- Unit of Cancer Pathology, CeSI, 'G. d'Annunzio' University Foundation, Via L. Polacchi 11, 66100, Chieti, Italy.
| | - Saverio Alberti
- Unit of Cancer Pathology, CeSI, 'G. d'Annunzio' University Foundation, Via L. Polacchi 11, 66100, Chieti, Italy. .,Department of Neuroscience, Imaging and Clinical Sciences, Unit of Physiology and Physiopathology, 'G. d'Annunzio' University, Via dei Vestini, 66100, Chieti, Italy.
| | - Youping Deng
- Rush University Medical Center, 653 W Congress Pkwy, Chicago, IL, 60612, USA.
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Abstract
It has been over 20 years since the discovery that caveolar lipid rafts function as signalling organelles. Lipid rafts create plasma membrane heterogeneity, and caveolae are the most extensively studied subset of lipid rafts. A newly emerging paradigm is that changes in caveolae also generate tumour metabolic heterogeneity. Altered caveolae create a catabolic tumour microenvironment, which supports oxidative mitochondrial metabolism in cancer cells and which contributes to dismal survival rates for cancer patients. In this Review, we discuss the role of caveolae in tumour progression, with a special emphasis on their metabolic and cell signalling effects, and their capacity to transform the tumour microenvironment.
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Affiliation(s)
- Ubaldo E Martinez-Outschoorn
- Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | - Federica Sotgia
- 1] Breakthrough Breast Cancer Research Unit, Institute of Cancer Sciences, University of Manchester, Manchester M20 4BX, UK. [2] Manchester Centre for Cellular Metabolism (MCCM), University of Manchester, Manchester M20 4BX, UK
| | - Michael P Lisanti
- 1] Breakthrough Breast Cancer Research Unit, Institute of Cancer Sciences, University of Manchester, Manchester M20 4BX, UK. [2] Manchester Centre for Cellular Metabolism (MCCM), University of Manchester, Manchester M20 4BX, UK
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Kim JW, Kim HJ, Lee CK, Shim JJ, Jang JY, Dong SH, Kim BH, Chang YW, Chi SG. Elevation of PRKCDBP, a novel transcriptional target of TNF-α, and its downregulation by infliximab in patients with ulcerative colitis. Dig Dis Sci 2014; 59:2947-57. [PMID: 25052149 DOI: 10.1007/s10620-014-3282-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 07/08/2014] [Indexed: 12/18/2022]
Abstract
BACKGROUND Protein kinase C delta binding protein (PRKCDBP/Cavin3/hSRBC) is a putative tumor suppressor that is downregulated in many human cancers. Recently, PRKCDBP was identified to be activated by nuclear factor-κB in response to tumor necrosis factor (TNF)-α. AIMS To explore the potential of PRKCDBP as a diagnostic or prognostic marker for inflammatory bowel disease, the possible correlation between its expression status and TNF-α signaling was evaluated in ulcerative colitis (UC) patients, both pre- and post-infliximab (IFX) therapy. METHODS In total, 31 IFX therapy-naïve patients (13 females; median age, 41 years) with moderate-to-severe UC who had been scheduled for IFX treatment were included. Immunohistochemical analysis of TNF-α and PRKCDBP expression was performed in rectal biopsies. RESULTS A significant correlation was observed in immunoreactivity between TNF-α and PRKCDBP. IFX therapy reduced immunohistochemical expression of PRKCDBP and TNF-α (P < 0.001 and P = 0.005, respectively). The mean PRKCDBP expression level decreased from 54.5 to 30.2%, and that of TNF-α decreased from 54.5 to 36.2%. The immunohistochemical expression pre- and post-PRKCDBP therapy correlated significantly with TNF-α levels pre- and post-therapy (Spearman's rank correlation test; P = 0.005 and P = 0.001, respectively). CONCLUSIONS These results demonstrate that mucosal expression of PRKCDBP correlated strongly with TNF-α expression in UC patients and that IFX therapy resulted in profound reductions in both PRKCDBP and TNF-α. Thus, these findings support that PRKCDBP expression is tightly controlled by TNF-α, and the anti-inflammatory effect of IFX may in part stem from blockade of the TNF-α-PRKCDBP signaling pathway.
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Affiliation(s)
- Jung-Wook Kim
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 130-872, Republic of Korea
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Gupta R, Toufaily C, Annabi B. Caveolin and cavin family members: dual roles in cancer. Biochimie 2014; 107 Pt B:188-202. [PMID: 25241255 DOI: 10.1016/j.biochi.2014.09.010] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 09/04/2014] [Indexed: 12/16/2022]
Abstract
Caveolae are specialized plasma membrane subdomains with distinct lipid and protein compositions, which play an essential role in cell physiology through regulation of trafficking and signaling functions. The structure and functions of caveolae have been shown to require the proteins caveolins. Recently, members of the cavin protein family were found to be required, in concert with caveolins, for the formation and function of caveolae. Caveolins have a paradoxical role in the development of cancer formation. They have been involved in both tumor suppression and oncogenesis, depending on tumor type and progress stage. High expression of caveolins and cavins leads to inhibition of cancer-related pathways, such as growth factor signaling pathways. However, certain cancer cells that express caveolins and cavins have been shown to be more aggressive and metastatic because of their increased potential for anchorage-independent growth. Here, we will survey the functional roles of caveolins and of different cavin family members in cancer regulation.
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Affiliation(s)
- Reshu Gupta
- Laboratoire d'Oncologie Moléculaire, Centre de Recherche BioMed, Département de Chimie, Université du Québec à Montréal, Québec H3C 3P8, Canada.
| | - Chirine Toufaily
- Laboratoire d'Oncologie Moléculaire, Centre de Recherche BioMed, Département de Chimie, Université du Québec à Montréal, Québec H3C 3P8, Canada
| | - Borhane Annabi
- Laboratoire d'Oncologie Moléculaire, Centre de Recherche BioMed, Département de Chimie, Université du Québec à Montréal, Québec H3C 3P8, Canada
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Moutinho C, Martinez-Cardús A, Santos C, Navarro-Pérez V, Martínez-Balibrea E, Musulen E, Carmona FJ, Sartore-Bianchi A, Cassingena A, Siena S, Elez E, Tabernero J, Salazar R, Abad A, Esteller M. Epigenetic inactivation of the BRCA1 interactor SRBC and resistance to oxaliplatin in colorectal cancer. J Natl Cancer Inst 2013; 106:djt322. [PMID: 24273214 PMCID: PMC3906989 DOI: 10.1093/jnci/djt322] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background A major problem in cancer chemotherapy is the existence of primary resistance and/or the acquisition of secondary resistance. Many cellular defects contribute to chemoresistance, but epigenetic changes can also be a cause. Methods A DNA methylation microarray was used to identify epigenetic differences in oxaliplatin-sensitive and -resistant colorectal cancer cells. The candidate gene SRBC was validated by single-locus DNA methylation and expression techniques. Transfection and short hairpin experiments were used to assess oxaliplatin sensitivity. Progression-free survival (PFS) and overall survival (OS) in metastasic colorectal cancer patients were explored with Kaplan–Meier and Cox regression analyses. All statistical tests were two-sided. Results We found that oxaliplatin resistance in colorectal cancer cells depends on the DNA methylation–associated inactivation of the BRCA1 interactor SRBC gene. SRBC overexpression or depletion gives rise to sensitivity or resistance to oxaliplatin, respectively. SRBC epigenetic inactivation occurred in primary tumors from a discovery cohort of colorectal cancer patients (29.8%; n = 39 of 131), where it predicted shorter PFS (hazard ratio [HR] = 1.83; 95% confidence interval [CI] = 1.15 to 2.92; log-rank P = .01), particularly in oxaliplatin-treated case subjects for which metastasis surgery was not indicated (HR = 1.96; 95% CI = 1.13 to 3.40; log-rank P = .01). In a validation cohort of unresectable colorectal tumors treated with oxaliplatin (n = 58), SRBC hypermethylation was also associated with shorter PFS (HR = 1.90; 95% CI = 1.01 to 3.60; log-rank P = .045). Conclusions These results provide a basis for future clinical studies to validate SRBC hypermethylation as a predictive marker for oxaliplatin resistance in colorectal cancer.
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Affiliation(s)
- Catia Moutinho
- Affiliations of authors: Cancer Epigenetics and Biology Program, Bellvitge Biomedical Research Institute, Barcelona, Spain (CM, AM-C, FJC, ME); Medical Oncology Service, Catalan Institute of Oncology, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Barcelona, Spain (AM-C, EM-B, AA); Department of Medical Oncology (CS, RS) and Clinical Informatics Unit (VN-P), Catalan Institute of Oncology, Bellvitge Biomedical Research Institute, L'Hospitalet de Llobregat, Barcelona, Spain; Department of Pathology, Germans Trias i Pujol Foundation, Barcelona, Spain (EM); Department of Hematology and Oncology, Ospedale Niguarda Ca' Granda, Milan, Italy (AS-B, AC, SS); Medical Oncology Department, Vall d'Hebron University Hospital, Barcelona, Spain (EE, JT); Department of Physiological Sciences II, School of Medicine, University of Barcelona, Barcelona, Barcelona, Spain (ME); Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain (ME)
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Hernandez VJ, Weng J, Ly P, Pompey S, Dong H, Mishra L, Schwarz M, Anderson RGW, Michaely P. Cavin-3 dictates the balance between ERK and Akt signaling. eLife 2013; 2:e00905. [PMID: 24069528 PMCID: PMC3780650 DOI: 10.7554/elife.00905] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Accepted: 08/14/2013] [Indexed: 12/22/2022] Open
Abstract
Cavin-3 is a tumor suppressor protein of unknown function. Using both in vivo and in vitro approaches, we show that cavin-3 dictates the balance between ERK and Akt signaling. Loss of cavin-3 increases Akt signaling at the expense of ERK, while gain of cavin-3 increases ERK signaling at the expense Akt. Cavin-3 facilitates signal transduction to ERK by anchoring caveolae to the membrane skeleton of the plasma membrane via myosin-1c. Caveolae are lipid raft specializations that contain an ERK activation module and loss of the cavin-3 linkage reduces the abundance of caveolae, thereby separating this ERK activation module from signaling receptors. Loss of cavin-3 promotes Akt signaling through suppression of EGR1 and PTEN. The in vitro consequences of the loss of cavin-3 include induction of Warburg metabolism (aerobic glycolysis), accelerated cell proliferation, and resistance to apoptosis. The in vivo consequences of cavin-3 knockout are increased lactate production and cachexia. DOI:http://dx.doi.org/10.7554/eLife.00905.001.
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Affiliation(s)
- Victor J Hernandez
- Department of Cell Biology , University of Texas Southwestern Medical Center , Dallas , United States
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Kim SJ, Sohn I, Do IG, Jung SH, Ko YH, Yoo HY, Paik S, Kim WS. Gene expression profiles for the prediction of progression-free survival in diffuse large B cell lymphoma: results of a DASL assay. Ann Hematol 2013; 93:437-47. [DOI: 10.1007/s00277-013-1884-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 08/14/2013] [Indexed: 11/28/2022]
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Parton RG, del Pozo MA. Caveolae as plasma membrane sensors, protectors and organizers. Nat Rev Mol Cell Biol 2013; 14:98-112. [PMID: 23340574 DOI: 10.1038/nrm3512] [Citation(s) in RCA: 637] [Impact Index Per Article: 57.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Caveolae are submicroscopic, plasma membrane pits that are abundant in many mammalian cell types. The past few years have seen a quantum leap in our understanding of the formation, dynamics and functions of these enigmatic structures. Caveolae have now emerged as vital plasma membrane sensors that can respond to plasma membrane stresses and remodel the extracellular environment. Caveolae at the plasma membrane can be removed by endocytosis to regulate their surface density or can be disassembled and their structural components degraded. Coat proteins, called cavins, work together with caveolins to regulate the formation of caveolae but also have the potential to dynamically transmit signals that originate in caveolae to various cellular destinations. The importance of caveolae as protective elements in the plasma membrane, and as membrane organizers and sensors, is highlighted by links between caveolae dysfunction and human diseases, including muscular dystrophies and cancer.
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Affiliation(s)
- Robert G Parton
- Institute for Molecular Bioscience and Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, QLD 4072, Australia.
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22
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Wikman H, Sielaff-Frimpong B, Kropidlowski J, Witzel I, Milde-Langosch K, Sauter G, Westphal M, Lamszus K, Pantel K. Clinical relevance of loss of 11p15 in primary and metastatic breast cancer: association with loss of PRKCDBP expression in brain metastases. PLoS One 2012; 7:e47537. [PMID: 23118876 PMCID: PMC3485301 DOI: 10.1371/journal.pone.0047537] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 09/12/2012] [Indexed: 11/18/2022] Open
Abstract
The occurrence of brain metastases among breast cancer patients is currently rising with approximately 20-25% incidence rates, underlining the importance of the identification of new therapeutic and prognostic markers. We have previously screened for new markers for brain metastasis by array CGH. We found that loss of 11p15 is common among these patients. In this study, we investigated the clinical significance of loss of 11p15 in primary breast cancer (BC) and breast cancer brain metastases (BCBM). 11p15 aberration patterns were assessed by allelic imbalance (AI) analysis in primary BC (n = 78), BCBM (n = 21) and metastases from other distant sites (n = 6) using six different markers. AI at 11p15 was significantly associated with BCBM (p = 0.002). Interestingly, a subgroup of primary BC with a later relapse to the brain had almost equally high AI rates as the BCBM cases. In primary BC, AI was statistically significantly associated with high grade, negative hormone receptor status, and triple-negative (TNBC) tumors. Gene expression profiling identified PRKCDBP in the 11p15 region to be significantly downregulated in both BCBM and primary BC with brain relapse compared to primary tumors without relapse or bone metastasis (fdr<0.05). qRT-PCR confirmed these results and methylation was shown to be a common way to silence this gene. In conclusion, we found loss at 11p15 to be a marker for TNBC primary tumors and BCBM and PRKCDBP to be a potential target gene in this locus.
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Affiliation(s)
- Harriet Wikman
- Institute of Tumor Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Tong SY, Lee JM, Ki KD, Seol HJ, Choi YJ, Lee SK. Genetic Polymorphism of PRKCDBP is Associated with an Increased Risk of Endometrial Cancer. Cancer Invest 2012; 30:642-5. [DOI: 10.3109/07357907.2012.727054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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van Dijk M, Visser A, Posthuma J, Poutsma A, Oudejans CBM. Naturally occurring variation in trophoblast invasion as a source of novel (epigenetic) biomarkers. Front Genet 2012; 3:22. [PMID: 22363344 PMCID: PMC3282249 DOI: 10.3389/fgene.2012.00022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 01/28/2012] [Indexed: 12/15/2022] Open
Abstract
During the first trimester of pregnancy fetal trophoblasts invade the maternal decidua, thereby remodeling the maternal spiral arteries. This process of trophoblast invasion is very similar to cancer cell invasion, with multiple signaling pathways shared between the two. Pregnancy-related diseases, e.g., pre-eclampsia, and cancer metastasis start with a decrease or increase in cellular invasion, respectively. Here, we investigate if first trimester placental explants can be used to identify epigenetic factors associated with changes in cellular invasion and their potential use as biomarkers. We show that the outgrowth potential of first trimester explants significantly correlates with promoter methylation of PRKCDBP and MMP2, two genes known to be differentially methylated in both placenta and cancer. The increase in methylation percentage of placental cells coincides with an increase in invasion potential. Subsequently, as a non-invasive marker must be detectable in blood, plasma samples of pregnant and non-pregnant women were analyzed. The MMP2 promoter showed high methylation levels in non-pregnant plasma samples, which decreased in pregnant plasma samples which also contain placental DNA. The decrease in methylated plasma DNA during pregnancy is most likely due to the fractional increase in unmethylated placental DNA. This suggests that the level of unmethylated DNA has the potential to be used as an invasion marker, where higher levels of unmethylated DNA indicate a lower invasion potential of trophoblasts. These proof of principle data provide evidence that human first trimester placental explants are an excellent ex vivo model system to identify (epigenetic) factors and thus potential biomarkers associated with changes in cellular invasion, e.g., to detect pregnancy-related diseases or cancer metastasis. To identify novel biomarkers the next step is to correlate naturally occurring variation in invasion potential to changes in (epigenetic) factors by genome-wide approaches such as massively parallel sequencing.
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Affiliation(s)
- Marie van Dijk
- Department of Clinical Chemistry, VU University Medical Center Amsterdam, Netherlands
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Bai L, Deng X, Li Q, Wang M, An W, A D, Gao Z, Xie Y, Dai Y, Cong YS. Down-regulation of the cavin family proteins in breast cancer. J Cell Biochem 2011; 113:322-8. [DOI: 10.1002/jcb.23358] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lee JH, Kang MJ, Han HY, Lee MG, Jeong SI, Ryu BK, Ha TK, Her NG, Han J, Park SJ, Lee KY, Kim HJ, Chi SG. Epigenetic alteration of PRKCDBP in colorectal cancers and its implication in tumor cell resistance to TNFα-induced apoptosis. Clin Cancer Res 2011; 17:7551-62. [PMID: 21980136 DOI: 10.1158/1078-0432.ccr-11-1026] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE PRKCDBP is a putative tumor suppressor in which alteration has been observed in several human cancers. We investigated expression and function of PRKCDBP in colorectal cells and tissues to explore its candidacy as a suppressor in colorectal tumorigenesis. EXPERIMENTAL DESIGN Expression and methylation status of PRKCDBP and its effect on tumor growth were evaluated. Transcriptional regulation by NF-κB signaling was defined by luciferase reporter and chromatin immunoprecipitation assays. RESULTS PRKCDBP expression was hardly detectable in 29 of 80 (36%) primary tumors and 11 of 19 (58%) cell lines, and its alteration correlated with tumor stage and grade. Promoter hypermethylation was commonly found in cancers. PRKCDBP expression induced the G(1) cell-cycle arrest and increased cellular sensitivity to various apoptotic stresses. PRKCDBP was induced by TNFα, and its level correlated with tumor cell sensitivity to TNFα-induced apoptosis. PRKCDBP induction by TNFα was disrupted by blocking NF-κB signaling while it was enhanced by RelA transfection. The PRKCDBP promoter activity was increased in response to TNFα, and this response was abolished by disruption of a κB site in the promoter. PRKCDBP delayed the formation and growth of xenograft tumors and improved tumor response to TNFα-induced apoptosis. CONCLUSIONS PRKCDBP is a proapoptotic tumor suppressor which is commonly altered in colorectal cancer by promoter hypermethylation, and its gene transcription is directly activated by NF-κB in response to TNFα. This suggests that PRKCDBP inactivation may contribute to tumor progression by reducing cellular sensitivity to TNFα and other stresses, particularly under chronic inflammatory microenvironment.
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Affiliation(s)
- Jin-Hee Lee
- School of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
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Genomic instability of gold nanoparticle treated human lung fibroblast cells. Biomaterials 2011; 32:5515-23. [DOI: 10.1016/j.biomaterials.2011.04.023] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Accepted: 04/06/2011] [Indexed: 12/27/2022]
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Carén H, Djos A, Nethander M, Sjöberg RM, Kogner P, Enström C, Nilsson S, Martinsson T. Identification of epigenetically regulated genes that predict patient outcome in neuroblastoma. BMC Cancer 2011; 11:66. [PMID: 21314941 PMCID: PMC3045360 DOI: 10.1186/1471-2407-11-66] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 02/11/2011] [Indexed: 11/27/2022] Open
Abstract
Background Epigenetic mechanisms such as DNA methylation and histone modifications are important regulators of gene expression and are frequently involved in silencing tumor suppressor genes. Methods In order to identify genes that are epigenetically regulated in neuroblastoma tumors, we treated four neuroblastoma cell lines with the demethylating agent 5-Aza-2'-deoxycytidine (5-Aza-dC) either separately or in conjunction with the histone deacetylase inhibitor trichostatin A (TSA). Expression was analyzed using whole-genome expression arrays to identify genes activated by the treatment. These data were then combined with data from genome-wide DNA methylation arrays to identify candidate genes silenced in neuroblastoma due to DNA methylation. Results We present eight genes (KRT19, PRKCDBP, SCNN1A, POU2F2, TGFBI, COL1A2, DHRS3 and DUSP23) that are methylated in neuroblastoma, most of them not previously reported as such, some of which also distinguish between biological subsets of neuroblastoma tumors. Differential methylation was observed for the genes SCNN1A (p < 0.001), PRKCDBP (p < 0.001) and KRT19 (p < 0.01). Among these, the mRNA expression of KRT19 and PRKCDBP was significantly lower in patients that have died from the disease compared with patients with no evidence of disease (fold change -8.3, p = 0.01 for KRT19 and fold change -2.4, p = 0.04 for PRKCDBP). Conclusions In our study, a low methylation frequency of SCNN1A, PRKCDBP and KRT19 is significantly associated with favorable outcome in neuroblastoma. It is likely that analysis of specific DNA methylation will be one of several methods in future patient therapy stratification protocols for treatment of childhood neuroblastomas.
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Affiliation(s)
- Helena Carén
- Department of Clinical Genetics, Institute of Biomedicine, University of Gothenburg, Sahlgrenska University Hospital, SE-41345 Gothenburg, Sweden.
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Agrawal P, Yu K, Salomon AR, Sedivy JM. Proteomic profiling of Myc-associated proteins. Cell Cycle 2010; 9:4908-21. [PMID: 21150319 DOI: 10.4161/cc.9.24.14199] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Mammalian c-Myc is a member of a small family of three closely related transcription factors. The Myc family of proto-oncogenes are among the most potent activators of tumorigenesis, and are frequently overexpressed in diverse cancers. c-Myc has an unusually broad array of regulatory functions, which include, in addition to roles in the cell cycle and apoptosis, effects on a variety of metabolic functions, cell differentiation, senescence, and stem cell maintenance. A significant number of c-Myc interacting proteins have already been defined, but it is widely believed that the c-Myc interactome is vastly larger than currently documented. In addition to interactions with components of the transcription machinery, transcription independent nuclear interactions with the DNA replication and RNA processing pathways have been reported. Cytoplasmic roles of c-Myc have also been recently substantiated. Recent advances in proteomics have opened new possibilities for the isolation of protein complexes under native conditions and confidently identifying the components using ultrasensitive, high mass accuracy and high resolution mass spectrometry techniques. In this communication we report a new tandem affinity purification (TAP) c-Myc interaction screen that employed new cell lines with near-physiological levels of c-Myc expression with multi-dimensional protein identification techniques (MudPIT) for the detection and quantification of proteins. Both label-free and the recently developed stable isotope labeling with amino acids in cell culture (SILAC) methodologies were used. Combined data from multiple biological replicates provided a dataset of 418 non-redundant proteins, 389 of which are putative novel interactors. This new information should significantly advance our understanding of this interesting and important master regulator.
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Affiliation(s)
- Pooja Agrawal
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA
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Wang H, Chen X. [Advances of DNA methylation in lung cancer]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2010; 13:1074-8. [PMID: 21081052 PMCID: PMC6000490 DOI: 10.3779/j.issn.1009-3419.2010.11.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Haibing Wang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital Affiliated to Tongji University, Shanghai 200433, China
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Abstract
DNA methylation as part of the epigenetic gene-silencing complex is a universal occurring change in lung cancer. Numerous studies investigated methylation of specific genes in primary tumors, in serum or plasma samples, and in specimens from the aerodigestive tract epithelium of lung cancer patients. In most studies, single genes or small numbers of genes were analyzed. Moreover, it has been observed that methylation of certain genes can already be detected in samples from the upper aerodigestive tract epithelium of cancer-free heavy smokers. These findings indicated that methylation of certain genes may be a useful biomarker for prognosis, disease recurrence, early detection, and lung cancer risk assessment. So far, several genes were identified which seem to be of worse prognostic relevance when they were found to be methylated. In addition, it has been shown that a panel of markers may be relevant to predict disease recurrence after surgery. In comparison to analysis of single or small numbers of genes, methods for genome-wide detection of methylation were developed recently. These approaches are focused on either pharmacological re-activation of methylated genes followed by expression microarray analysis or on microarray analysis of sodium bisulfite-treated or affinity-enriched methylated DNA sequences. With currently available methods for the simultaneous detection of methylation, up to 28,000 CpG islands can be analyzed. Overall, we are just at the beginning of translating these findings into the clinic and there is hope that future patients will benefit from these results.
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McMahon KA, Zajicek H, Li WP, Peyton MJ, Minna JD, Hernandez VJ, Luby-Phelps K, Anderson RGW. SRBC/cavin-3 is a caveolin adapter protein that regulates caveolae function. EMBO J 2009; 28:1001-15. [PMID: 19262564 DOI: 10.1038/emboj.2009.46] [Citation(s) in RCA: 158] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Accepted: 01/21/2009] [Indexed: 11/09/2022] Open
Abstract
Caveolae are a major membrane domain common to most cells. One of the defining features of this domain is the protein caveolin. The exact function of caveolin, however, is not clear. One possible function is to attract adapter molecules to caveolae in a manner similar to how clathrin attracts molecules to coated pits. Here, we characterize a candidate adapter molecule called SRBC. SRBC binds PKCdelta and is a member of the STICK (substrates that interact with C-kinase) superfamily of PKC-binding proteins. We also show it co-immunoprecipitates with caveolin-1. A leucine zipper in SRBC is essential for both co-precipitation with caveolin and localization to caveolae. SRBC remains associated with caveolin when caveolae bud to form vesicles (cavicles) that travel on microtubules to different regions of the cell. In the absence of SRBC, intracellular cavicle traffic is markedly impaired. We conclude that SRBC (sdr-related gene product that binds to c-kinase) and two other family members [PTRF (Pol I and transcription release factor) and SDPR] function as caveolin adapter molecules that regulate caveolae function.
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Affiliation(s)
- Kerrie-Ann McMahon
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9039, USA
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Lee JH, Byun DS, Lee MG, Ryu BK, Kang MJ, Chae KS, Lee KY, Kim HJ, Park H, Chi SG. Frequent epigenetic inactivation of hSRBC in gastric cancer and its implication in attenuated p53 response to stresses. Int J Cancer 2008; 122:1573-84. [PMID: 18059034 DOI: 10.1002/ijc.23166] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
hSRBC is a putative tumor suppressor located at 11p15.4, at which frequent genomic loss has been observed in several human malignancies. To explore the candidacy of hSRBC as a suppressor of gastric tumorigenesis, we analyzed the expression and mutation status of hSRBC in gastric tissues and cell lines. hSRBC transcript was expressed in all normal and benign tumor tissues examined, but undetectable or very low in 73% (11/15) cancer cell lines and 41% (46/111) primary tumors. Loss or reduction of hSRBC expression was tumor-specific and correlated with stage and grade of tumors. While allelic loss or somatic mutations of the gene were infrequent, its expression was restored in tumor cells by 5-aza-2'-deoxycytidine treatment and aberrant hypermethylation of 23 CpG sites in the promoter region showed a tight association with altered expression. Transient or stable expression of hSRBC led to a G(1) cell cycle arrest and apoptosis of tumor cells, and strongly suppresses colony forming ability and xenograft tumor growth. In addition, hSRBC elevated apoptotic sensitivity of tumor cells to genotoxic agents, such as 5-FU, etoposide and ultraviolet. Interestingly, hSRBC increased the protein stability of p53 and expression of p53 target genes, such as p21(Waf1), PUMA and NOXA, while hSRBC-mediated cell cycle arrest and apoptosis were abolished by blockade of p53 function. Our findings suggest that hSRBC is a novel tumor suppressor whose epigenetic inactivation contributes to the malignant progression of gastric tumors, in part, through attenuated p53 response to stresses.
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Affiliation(s)
- Jin-Hee Lee
- School of Life Sciences and Biotechnology, Korea University, Seoul, Korea
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Abstract
Epigenetics is the study of heritable changes in gene expression that occur without changes in DNA sequence. It has a role in determining when and where a gene is expressed during development. Perhaps the most well known epigenetic mechanism is DNA methylation whereby cytosines at position 5 in CpG dinucleotides are methylated. Histone modification is another form of epigenetic control, which is quite complex and diverse. Histones and DNA make up the nucleosome which is the structural unit of chromatin which are involved in packaging DNA. Apart from the crucial role epigenetics plays in embryonic development, transcription, chromatin structure, X chromosome inactivation and genomic imprinting, its role in an increasing number of human diseases is more and more recognized. These diseases include cancer, and lung cancer in particular has been increasingly studied for the potential biological role of epigenetic changes with the promise of better and novel diagnostic and therapeutic tools.
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