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Lin H, Lin T, Lin J, Yang M, Shen Z, Liu H, Zou Z, Zheng Z. Inhibition of miR-423-5p suppressed prostate cancer through targeting GRIM-19. Gene 2018; 688:93-97. [PMID: 30415005 DOI: 10.1016/j.gene.2018.11.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/07/2018] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To determine the effect of miR-423-5p on the progression of prostate cancer (PC). METHODS miR-423-5p and GRIM-19 expressions were detected by qRT-PCR and western blot. PC cell proliferation was measured by MTT assay. PC cell apoptosis was detected by flow cytometry. Dual luciferase reporter assay was used to confirm the interaction between miR-423-5p and GRIM-19. RESULTS Compared with normal prostate tissues and prostate epithelial cell HPrEC, miR-423-5p was up-regulated in human PC tissues and PC3 cells, whereas GRIM-19 expression was decreased. Inhibition of miR-423-5p suppressed PC3 cell proliferation, promoted PC3 cell apoptosis, and decreased anti-apoptosis protein BCL-2 expression. GRIM-19 was a target of miR-423-5p, and GRIM-19 was negatively regulated by miR-423-5p in PC3 cells. In addition, miR-423-5p knockdown inhibited the proliferation and promoted the apoptosis of PC3 cells through GRIM-19. In vivo experiments showed that miR-423-5p inhibitor administration reduced tumor volume, down-regulated miR-423-5p and GRIM-19 expressions in PC tissues of nude mice. CONCLUSION Inhibition of miR-423-5p suppressed PC through targeting GRIM-19.
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Affiliation(s)
- Haili Lin
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China.
| | - Tianqi Lin
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
| | - Jiangui Lin
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
| | - Minggen Yang
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
| | - Zaixiong Shen
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
| | - Hongjie Liu
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
| | - Zongkai Zou
- Department of Pathology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
| | - Zhouda Zheng
- Department of Urology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, Fujian, China
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Nallar SC, Kalvakolanu DV. GRIM-19: A master regulator of cytokine induced tumor suppression, metastasis and energy metabolism. Cytokine Growth Factor Rev 2016; 33:1-18. [PMID: 27659873 DOI: 10.1016/j.cytogfr.2016.09.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 09/14/2016] [Indexed: 12/31/2022]
Abstract
Cytokines induce cell proliferation or growth suppression depending on the context. It is increasingly becoming clear that success of standard radiotherapy and/or chemotherapeutics to eradicate solid tumors is dependent on IFN signaling. In this review we discuss the molecular mechanisms of tumor growth suppression by a gene product isolated in our laboratory using a genome-wide expression knock-down strategy. Gene associated with retinoid-IFN-induced mortality -19 (GRIM-19) functions as non-canonical tumor suppressor by antagonizing oncoproteins. As a component of mitochondrial respiratory chain, GRIM-19 influences the degree of "Warburg effect" in cancer cells as many advanced and/or aggressive tumors show severely down-regulated GRIM-19 levels. In addition, GRIM-19 appears to regulate innate and acquired immune responses in mouse models. Thus, GRIM-19 is positioned at nodes that favor cell protection and/or prevent aberrant cell growth.
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Affiliation(s)
- Shreeram C Nallar
- Department of Microbiology and Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Dhan V Kalvakolanu
- Department of Microbiology and Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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3
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Zhou Y, Xu F, Tao F, Feng D, Ling B, Qian L, Yang X, Wang Q, Wang H, Zhao W, Cheng Y, Shan G, Kalvakolanu DV, Xiao W. GRIM-19 Restores Cervical Cancer Cell Senescence by Repressing hTERT Transcription. J Interferon Cytokine Res 2016; 36:506-15. [PMID: 27142689 DOI: 10.1089/jir.2015.0125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
High telomerase activity promotes tumor growth by stabilizing damaged chromosomes and their mitotic replication. Overactivation of telomerase activity has been reported in cervical cancer, a malignancy caused by high-risk human papillomaviruses (HR-HPVs). The HR-HPV E6 can activate hTERT promoter by interacting with E6AP or other binding proteins and by stabilizing the interaction between hTERT and E6AP. GRIM-19 is a novel tumor suppressor that affects multiple targets in a cell to regulate growth. We have previously reported the interaction of GRIM-19 with 18E6 and E6AP to disrupt the E6/E6AP complex and increase the autoubiquitination of E6AP. In this study, we characterized the interaction of GRIM-19 with 16E6 (an oncoprotein produced by HPV16) and identified the binding sites that mediate this interaction. We also found that GRIM-19 expression in cervical cancer cells could inhibit telomerase activity by inhibiting the transactivation of the hTERT promoter by E6, thereby promoting cervical cancer cell senescence. Moreover, we identified a negative correlation between GRIM-19 and hTERT expression in cervical cancer tissues. Suppression of GRIM-19 and induction of hTERT levels were associated with lymph node metastasis, advanced clinical stage, and poor prognosis. This study identified another important novel antitumor molecular link associated with GRIM-19 in the tumorigenesis.
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Affiliation(s)
- Ying Zhou
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Fei Xu
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Feng Tao
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Dingqing Feng
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Bin Ling
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Lili Qian
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Xia Yang
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Qingyuan Wang
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Huiyan Wang
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Weidong Zhao
- 1 Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Yong Cheng
- 2 Department of Oncological Radiotherapy, Anhui Provincial Hospital Affiliated to Anhui Medical University , Hefei, China
| | - Ge Shan
- 3 Hefei National Laboratory for Physical Sciences, Microscale and School of Life Sciences, University of Science and Technology of China , Hefei, Anhui, China
| | - Dhan V Kalvakolanu
- 4 Department of Microbiology and Immunology, Greenebaum Cancer Center, University of Maryland School of Medicine , Baltimore, Maryland
| | - Weihua Xiao
- 3 Hefei National Laboratory for Physical Sciences, Microscale and School of Life Sciences, University of Science and Technology of China , Hefei, Anhui, China
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4
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Yue X, Zhao P, Wu K, Huang J, Zhang W, Wu Y, Liang X, He X. GRIM-19 inhibition induced autophagy through activation of ERK and HIF-1α not STAT3 in Hela cells. Tumour Biol 2016; 37:9789-96. [PMID: 26810068 DOI: 10.1007/s13277-016-4877-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 01/15/2016] [Indexed: 12/13/2022] Open
Abstract
Gene associated with retinoid-interferon-induced mortality (GRIM-19), an important subunit of mitochondrial complex I, has been identified as a tumor suppressor, and its reduced expression has been reported to be associated with tumorigenesis and metastasis. Autophagy has been proposed as a protective mechanism for cell survival under various stresses, including chemotherapy. However, it remains unknown whether GRIM-19 is linked to autophagy and chemotherapy resistance. Here, we showed that suppression of GRIM-19 by shRNA enhanced cell-type-dependent autophagy by activating extracellular regulated protein kinase (ERK) and hypoxia inducible factor-1a (HIF-1a) in a reactive oxygen species (ROS)-mediated manner, and thereby conferred resistance to paclitaxel. Besides, the antioxidant N-acetyl-L-cysteine (NAC) and autophagy inhibitor 3-MA could in part overcome this resistance. We also found that GRIM-19 expression was significantly correlated with clinical stage and grade in patients with cervical cancers. Taken together, our results indicated that GRIM-19 inhibition induced autophagy and chemotherapy resistance, which could affect prognosis of cervical cancers. Our study has identified new function of GRIM-19 and its underlying mechanism, and it will provide possible avenues for therapeutic targeting in cervical cancers.
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MESH Headings
- Adult
- Antineoplastic Agents, Phytogenic/pharmacology
- Apoptosis/drug effects
- Apoptosis Regulatory Proteins/antagonists & inhibitors
- Apoptosis Regulatory Proteins/genetics
- Apoptosis Regulatory Proteins/metabolism
- Autophagy/drug effects
- Biomarkers, Tumor/metabolism
- Blotting, Western
- Case-Control Studies
- Cell Proliferation/drug effects
- Drug Resistance, Neoplasm
- Female
- Fluorescent Antibody Technique
- Follow-Up Studies
- HeLa Cells
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Lymphatic Metastasis
- Male
- Mitogen-Activated Protein Kinase 1/metabolism
- Mitogen-Activated Protein Kinase 3/metabolism
- NADH, NADPH Oxidoreductases/antagonists & inhibitors
- NADH, NADPH Oxidoreductases/genetics
- NADH, NADPH Oxidoreductases/metabolism
- Neoplasm Invasiveness
- Neoplasm Staging
- Paclitaxel/pharmacology
- Prognosis
- RNA, Small Interfering/genetics
- STAT3 Transcription Factor/metabolism
- Survival Rate
- Tumor Cells, Cultured
- Uterine Cervical Neoplasms/drug therapy
- Uterine Cervical Neoplasms/metabolism
- Uterine Cervical Neoplasms/pathology
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Affiliation(s)
- Xin Yue
- Clinical Research Center, Wuhan Medical and Healthcare Center for Women and Children, No. 100 Hongkong Rd, Wuhan, Hubei, China
| | - Peiwei Zhao
- Clinical Research Center, Wuhan Medical and Healthcare Center for Women and Children, No. 100 Hongkong Rd, Wuhan, Hubei, China
| | - Kongming Wu
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, China
| | - Juan Huang
- Department of Pathology, Wuhan Medical and Healthcare Center for Women and Children, Wuhan, Hubei, China
| | - Wen Zhang
- Department of Pathology, Wuhan Medical and Healthcare Center for Women and Children, Wuhan, Hubei, China
| | - Yaogui Wu
- School of Public Health, Wuhan University, Wuhan, China
| | - Xiaohui Liang
- Department of Oncology, Renmin Hospital, Wuhan University, Wuhan, China
| | - Xuelian He
- Clinical Research Center, Wuhan Medical and Healthcare Center for Women and Children, No. 100 Hongkong Rd, Wuhan, Hubei, China.
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5
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Hao M, Shu Z, Sun H, Sun R, Wang Y, Liu T, Ji D, Cong X. GRIM-19 expression is a potent prognostic marker in colorectal cancer. Hum Pathol 2015; 46:1815-20. [DOI: 10.1016/j.humpath.2015.07.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/21/2015] [Accepted: 07/23/2015] [Indexed: 11/26/2022]
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6
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Kjellin H, Johansson H, Höög A, Lehtiö J, Jakobsson PJ, Kjellman M. Differentially expressed proteins in malignant and benign adrenocortical tumors. PLoS One 2014; 9:e87951. [PMID: 24498411 PMCID: PMC3912167 DOI: 10.1371/journal.pone.0087951] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 01/06/2014] [Indexed: 01/04/2023] Open
Abstract
We have compared the microsomal protein composition of eight malignant and six benign adrenocortical tumors with proteomic methods. IGF2 had increased level in the malignant tumors, confirming previous microarray studies on the same material. Aldolase A, a glycolytic enzyme, also showed increased levels in the malignant tissue compared to the benign. Additionally, several proteins belonging to complex I in the mitochondrial respiration chain showed decreased levels in the malignant tissue. Taken together, this may indicate a shift in energy metabolism where glycolysis may be favored over tight coupling of glycolysis and mitochondrial respiration, a phenomenon known as the Warburg effect. One of the complex I proteins that showed decreased levels in the malignant tissue was GRIM-19. This protein has been suggested as a tumor suppressive protein by being a negative regulator of STAT3. In summary, an analysis of the microsomal proteome in adrenocortical tumors identifies groups of proteins as well as specific proteins differentially expressed in the benign and malignant forms. These proteins shed light on the biology behind malignancy and could delineate future drug targets.
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Affiliation(s)
- Hanna Kjellin
- Rheumatology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Science for Life Laboratory, Cancer Proteomics Mass Spectrometry, Karolinska Institutet, Solna, Sweden
- * E-mail:
| | - Henrik Johansson
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Science for Life Laboratory, Cancer Proteomics Mass Spectrometry, Karolinska Institutet, Solna, Sweden
| | - Anders Höög
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Janne Lehtiö
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Science for Life Laboratory, Cancer Proteomics Mass Spectrometry, Karolinska Institutet, Solna, Sweden
| | - Per-Johan Jakobsson
- Rheumatology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Magnus Kjellman
- Department of Breast- and Endocrine Surgery, Section of Endocrine and Sarcoma Surgery, Karolinska University Hospital, Stockholm, Sweden
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7
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8
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Reduced Expression of NDUFS3 and Its Clinical Significance in Serous Ovarian Cancer. Int J Gynecol Cancer 2013; 23:622-9. [DOI: 10.1097/igc.0b013e318287a90d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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9
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He X, Zhou A, Lu H, Chen Y, Huang G, Yue X, Zhao P, Wu Y. Suppression of mitochondrial complex I influences cell metastatic properties. PLoS One 2013; 8:e61677. [PMID: 23630608 PMCID: PMC3632579 DOI: 10.1371/journal.pone.0061677] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 03/13/2013] [Indexed: 12/27/2022] Open
Abstract
Despite the fact that mitochondrial dysfunction has an important role in tumorigenesis and metastasis, the underlying mechanism remains to be elucidated. Mitochondrial Complex I (NADH:ubiquinone oxidoreductase) is the first and the largest protein complex of the mitochondrial electron-transport chain (ETC),which has an essential role in maintaining mitochondrial function and integrity. In this study, we separately knocked down two subunits of mitochondrial complex I, GRIM-19 or NDUFS3, and investigated their effects on metastatic behaviors and explored the possible mechanisms. Our data showed that stable down-modulation of GRIM-19 or NDUFS3 decreased complex I activity and reactive oxygen species (ROS) production; led to enhanced cell adhesion, migration, invasion, and spheroid formation; and influenced the expressions of extracellular matrix (ECM) molecules and its related proteins. We also observed that the expressions of GRIM-19, NDUFS3, and ECM elements were correlated with invasive capabilities of breast cancer cell lines. These results suggest that inhibition of complex I affects metastatic properties of cancer cells, and mitochondrial ROS might play a crucial role in these processes by regulating ECM.
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Affiliation(s)
- Xuelian He
- Central Laboratory, Wuhan Medical and Healthcare Center for Women and Children, Hubei, China
- Institute of Molecular and Cell Biology, A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore
| | - Aifen Zhou
- Department of Healthcare, Wuhan Medical and Healthcare Center for Women and Children, Hubei, China
| | - Hao Lu
- Institute of Molecular and Cell Biology, A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore
| | - Yong Chen
- Institute of Molecular and Cell Biology, A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore
| | - Guochang Huang
- Institute of Molecular and Cell Biology, A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore
| | - Xin Yue
- Central Laboratory, Wuhan Medical and Healthcare Center for Women and Children, Hubei, China
| | - Peiwei Zhao
- Central Laboratory, Wuhan Medical and Healthcare Center for Women and Children, Hubei, China
| | - Yanxiang Wu
- Central Laboratory, Wuhan Medical and Healthcare Center for Women and Children, Hubei, China
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10
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Fan XY, Jiang ZF, Cai L, Liu RY. Expression and clinical significance of GRIM-19 in lung cancer. Med Oncol 2012; 29:3183-9. [PMID: 22573109 DOI: 10.1007/s12032-012-0249-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 04/25/2012] [Indexed: 01/06/2023]
Abstract
We investigated the expression of gene associated with retinoid-interferon-induced mortality-19 (GRIM-19) in lung cancer, a recently discovered cell death regulatory gene. Over-expression of GRIM-19 potentially suppresses proliferation and promotes tumor cell apoptosis. However, the expression of GRIM-19 in human lung cancer has not yet been thoroughly investigated. All of the specimens were obtained using CT-guided lung puncture or bronchial biopsy. The expression of GRIM-19 was investigated using immunohistochemistry. The expression level of GRIM-19 was significantly different between lung cancer and lung inflammation. A relatively lower GRIM-19 expression level was also found in small cell lung carcinomas compared to squamous cell carcinoma and adenocarcinoma. No significant difference between GRIM-19 expression in squamous cell carcinoma and adenocarcinoma was determined. Downregulation of GRIM-19 was found in non-small cell lung carcinomas stages III-IV compared to stages I-II, indicating a negative correlation between the expression level of GRIM-19 and the stage of the primary lesion (T). Furthermore, we found GRIM-19 to be primarily located in the cytoplasm in lung inflammation tissues, but located in the nucleus in lung cancer tissues. GRIM-19 expression occurs as an early phenomenon in the pathogenesis of lung cancer. Our study found that GRIM-19 expression in lung cancer is significantly lower compared to lung inflammation, exhibits a relationship with the histological type and clinical stage of lung cancer, and is a suitable target for the development of new lung cancer therapies.
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Affiliation(s)
- Xiao-Yun Fan
- Department of Geriatric Respiratory Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People's Republic of China
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11
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Chiaradonna F, Moresco RM, Airoldi C, Gaglio D, Palorini R, Nicotra F, Messa C, Alberghina L. From cancer metabolism to new biomarkers and drug targets. Biotechnol Adv 2011; 30:30-51. [PMID: 21802503 DOI: 10.1016/j.biotechadv.2011.07.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 07/13/2011] [Indexed: 12/14/2022]
Abstract
Great interest is presently given to the analysis of metabolic changes that take place specifically in cancer cells. In this review we summarize the alterations in glycolysis, glutamine utilization, fatty acid synthesis and mitochondrial function that have been reported to occur in cancer cells and in human tumors. We then propose considering cancer as a system-level disease and argue how two hallmarks of cancer, enhanced cell proliferation and evasion from apoptosis, may be evaluated as system-level properties, and how this perspective is going to modify drug discovery. Given the relevance of the analysis of metabolism both for studies on the molecular basis of cancer cell phenotype and for clinical applications, the more relevant technologies for this purpose, from metabolome and metabolic flux analysis in cells by Nuclear Magnetic Resonance and Mass Spectrometry technologies to positron emission tomography on patients, are analyzed. The perspectives offered by specific changes in metabolism for a new drug discovery strategy for cancer are discussed and a survey of the industrial activity already going on in the field is reported.
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Affiliation(s)
- F Chiaradonna
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy.
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Hua Y, Jia X, Sun M, Zheng L, Yin L, Zhang L, Cai Z. Plasma membrane proteomic analysis of human osteosarcoma and osteoblastic cells: revealing NDRG1 as a marker for osteosarcoma. Tumour Biol 2011; 32:1013-21. [PMID: 21706236 DOI: 10.1007/s13277-011-0203-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Accepted: 06/10/2011] [Indexed: 01/07/2023] Open
Abstract
Osteosarcoma (OS) is the most common primary malignant bone tumor in children and adolescents. To identify new biomarkers for early diagnosis of OS and novel therapeutic candidates, we carried out a plasma membrane proteomic study based on two-dimensional electrophoresis (2DE). The OS cell line MG-63 and the human osteoblastic cell line hFOB1.19 were adopted as the comparison model. We extracted plasma membrane by aqueous two-phase partition extraction. The proteins were separated through 2DE. We analyzed the differentially expressed proteins by Imagemaster software and then identified them by liquid chromatography-tandem mass spectrometry, and the location and function of differential proteins were searched through the Gene Ontology database. In total, 220 protein spots were separated by 2DE. Seven proteins with more than 2.0-folds of difference were successfully identified from 13 gel spots, with 6 up-regulated and 1 down-regulated. Gene Ontology analysis of the differentially expressed proteins indicated that these proteins were involved in seven kinds of functions including binding, structural, cell motility, receptor activity, electron carrier activity, NADH dehydrogenase (ubiquinone) activity, and transcription repressor activity. The up-regulation of NDRG1 was verified in osteosarcoma through Western blotting and by immunohistochemistry in paraffin-embedded tissues. The plasma membrane proteins identified in this study may provide new insights into osteosarcoma cancer biology and potential diagnostic and therapeutic biomarkers.
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Affiliation(s)
- Yingqi Hua
- Musculoskeletal Oncology Center, Shanghai 10th People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
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