51
|
Ni Z, He J, Wu Y, Hu C, Dai X, Yan X, Li B, Li X, Xiong H, Li Y, Li S, Xu L, Li Y, Lian J, He F. AKT-mediated phosphorylation of ATG4B impairs mitochondrial activity and enhances the Warburg effect in hepatocellular carcinoma cells. Autophagy 2018; 14:685-701. [PMID: 29165041 DOI: 10.1080/15548627.2017.1407887] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Phosphorylation is a major type of post-translational modification, which can influence the cellular physiological function. ATG4B, a key macroautophagy/autophagy-related protein, has a potential effect on the survival of tumor cells. However, the role of ATG4B phosphorylation in cancers is still unknown. In this study, we identified a novel phosphorylation site at Ser34 of ATG4B induced by AKT in HCC cells. The phosphorylation of ATG4B at Ser34 had little effect on autophagic flux, but promoted the Warburg effect including the increase of L-lactate production and glucose consumption, and the decrease of oxygen consumption in HCC cells. The Ser34 phosphorylation of ATG4B also contributed to the impairment of mitochondrial activity including the inhibition of F1Fo-ATP synthase activity and the elevation of mitochondrial ROS in HCC cells. Moreover, the phosphorylation of ATG4B at Ser34 enhanced its mitochondrial location and the subsequent colocalization with F1Fo-ATP synthase in HCC cells. Furthermore, recombinant human ATG4B protein suppressed the activity of F1Fo-ATP synthase in MgATP submitochondrial particles from patient-derived HCC tissues in vitro. In brief, our results demonstrate for the first time that the phosphorylation of ATG4B at Ser34 participates in the metabolic reprogramming of HCC cells via repressing mitochondrial function, which possibly results from the Ser34 phosphorylation-induced mitochondrial enrichment of ATG4B and the subsequent inhibition of F1Fo-ATP synthase activity. Our findings reveal a noncanonical working pattern of ATG4B under pathological conditions, which may provide a scientific basis for developing novel strategies for HCC treatment by targeting ATG4B and its Ser34 phosphorylation.
Collapse
Affiliation(s)
- Zhenhong Ni
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Jintao He
- b Battalion 17 of Students , College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Yaran Wu
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Changjiang Hu
- c Department of Gastroenterology , Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Xufang Dai
- d College of Educational Science, Chongqing Normal University , Chongqing , China
| | - Xiaojing Yan
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Bo Li
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Xinzhe Li
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Haojun Xiong
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Yuming Li
- e Department of Hepatobiliary Surgery , Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Song Li
- f Center for Pharmacogenetics , Department of Pharmaceutical Sciences, School of Pharmacy , University of Pittsburgh , Pittsburgh , PA , USA
| | - Liang Xu
- g Department of Molecular Biosciences and Department of Radiation Oncology , University of Kansas Cancer Center, University of Kansas , Lawrence , KS , USA
| | - Yongsheng Li
- h Institute of Cancer, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Jiqin Lian
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| | - Fengtian He
- a Department of Biochemistry and Molecular Biology , College of Basic Medical Sciences, Third Military Medical University , Chongqing, China
| |
Collapse
|
52
|
Matsumoto T, Uchiumi T, Monji K, Yagi M, Setoyama D, Amamoto R, Matsushima Y, Shiota M, Eto M, Kang D. Doxycycline induces apoptosis via ER stress selectively to cells with a cancer stem cell-like properties: importance of stem cell plasticity. Oncogenesis 2017; 6:397. [PMID: 29184058 PMCID: PMC5868058 DOI: 10.1038/s41389-017-0009-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/31/2017] [Accepted: 08/31/2017] [Indexed: 12/12/2022] Open
Abstract
Tumor heterogeneity can be traced back to a small subset of cancer stem cells (CSCs), which can be derived from a single stem cell and show chemoresistance. Recent studies showed that CSCs are sensitive to mitochondrial targeting antibiotics such as doxycycline. However, little is known about how cancer cells undergo sphere formation and how antibiotics inhibit CSC proliferation. Here we show that under sphere-forming assay conditions, prostate cancer cells acquired CSC-like properties: promoted mitochondrial respiratory chain activity, expression of characteristic CSC markers and resistance to anticancer agents. Furthermore, those CSC-like properties could reversibly change depending on the culture conditions, suggesting some kinds of CSCs have plasticity in tumor microenvironments. The sphere-forming cells (i.e. cancer stem-like cells) showed increased contact between mitochondria and mitochondrial associated-endoplasmic reticulum (ER) membranes (MAM). Mitochondrial targeting doxycycline induced activating transcription factor 4 (ATF4) mediated expression of ER stress response and led to p53-upregulated modulator of apoptosis (PUMA)-dependent apoptosis only in the cancer stem-like cells. We also found that doxycycline effectively suppressed the sphere formation in vitro and blocked CD44v9-expressing tumor growth in vivo. In summary, these data provide new molecular findings that monolayer cancer cells acquire CSC-like properties in a reversible manner. These findings provide important insights into CSC biology and a potential new treatment of targeting mitochondria dependency.
Collapse
Affiliation(s)
- Takashi Matsumoto
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.,Department of Urology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takeshi Uchiumi
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Keisuke Monji
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.,Department of Urology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Mikako Yagi
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Daiki Setoyama
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Rie Amamoto
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.,Department of Nutritional Sciences, Faculty of Health and Welfare, Seinan Jo Gakuin University, 1-3-5 Ibori, Kokurakita-ku, Kitakyushu, 803-0835, Japan
| | - Yuichi Matsushima
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masaki Shiota
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masatoshi Eto
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Dongchon Kang
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| |
Collapse
|
53
|
Li D, Du X, Guo X, Zhan L, Li X, Yin C, Chen C, Li M, Li B, Yang H, Xing J. Site-specific selection reveals selective constraints and functionality of tumor somatic mtDNA mutations. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2017; 36:168. [PMID: 29179728 PMCID: PMC5704541 DOI: 10.1186/s13046-017-0638-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Accepted: 11/16/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Previous studies have indicated that tumor mitochondrial DNA (mtDNA) mutations are primarily shaped by relaxed negative selection, which is contradictory to the critical roles of mtDNA mutations in tumorigenesis. Therefore, we hypothesized that site-specific selection may influence tumor mtDNA mutations. METHODS To test our hypothesis, we developed the largest collection of tumor mtDNA mutations to date and evaluated how natural selection shaped mtDNA mutation patterns. RESULTS Our data demonstrated that both positive and negative selections acted on specific positions or functional units of tumor mtDNAs, although the landscape of these mutations was consistent with the relaxation of negative selection. In particular, mutation rate (mutation number in a region/region bp length) in complex V and tRNA coding regions, especially in ATP8 within complex V and in loop and variable regions within tRNA, were significantly lower than those in other regions. While the mutation rate of most codons and amino acids were consistent with the expectation under neutrality, several codons and amino acids had significantly different rates. Moreover, the mutations under selection were enriched for changes that are predicted to be deleterious, further supporting the evolutionary constraints on these regions. CONCLUSION These results indicate the existence of site-specific selection and imply the important role of the mtDNA mutations at some specific sites in tumor development.
Collapse
Affiliation(s)
- Deyang Li
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Xiaohong Du
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Xu Guo
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Lei Zhan
- Department of Gastroenterology, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Xin Li
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Chun Yin
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | - Cheng Chen
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China
| | | | - Bingshan Li
- Center for Human Genetics Research, Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, 37232, USA
| | - Hushan Yang
- Division of Population Science, Department of Medical Oncology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Jinliang Xing
- State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic Medicine, Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, China.
| |
Collapse
|
54
|
Onuchic V, Hartmaier RJ, Boone DN, Samuels ML, Patel RY, White WM, Garovic VD, Oesterreich S, Roth ME, Lee AV, Milosavljevic A. Epigenomic Deconvolution of Breast Tumors Reveals Metabolic Coupling between Constituent Cell Types. Cell Rep 2017; 17:2075-2086. [PMID: 27851969 DOI: 10.1016/j.celrep.2016.10.057] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 07/28/2016] [Accepted: 09/26/2016] [Indexed: 12/13/2022] Open
Abstract
Cancer progression depends on both cell-intrinsic processes and interactions between different cell types. However, large-scale assessment of cell type composition and molecular profiles of individual cell types within tumors remains challenging. To address this, we developed epigenomic deconvolution (EDec), an in silico method that infers cell type composition of complex tissues as well as DNA methylation and gene transcription profiles of constituent cell types. By applying EDec to The Cancer Genome Atlas (TCGA) breast tumors, we detect changes in immune cell infiltration related to patient prognosis, and a striking change in stromal fibroblast-to-adipocyte ratio across breast cancer subtypes. Furthermore, we show that a less adipose stroma tends to display lower levels of mitochondrial activity and to be associated with cancerous cells with higher levels of oxidative metabolism. These findings highlight the role of stromal composition in the metabolic coupling between distinct cell types within tumors.
Collapse
Affiliation(s)
- Vitor Onuchic
- Molecular and Human Genetics Department, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA; Program in Structural and Computational Biology and Molecular Biophysics, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA.
| | - Ryan J Hartmaier
- Department of Pharmacology and Chemical Biology, Magee Womens Research Institute, University of Pittsburgh Cancer Institute, 204 Craft Avenue, B705, Pittsburgh, PA 15213, USA
| | - David N Boone
- Department of Pharmacology and Chemical Biology, Magee Womens Research Institute, University of Pittsburgh Cancer Institute, 204 Craft Avenue, B705, Pittsburgh, PA 15213, USA
| | - Michael L Samuels
- RainDance Technologies, Inc., 749 Middlesex Turnpike, Billerica, MA 01821, USA
| | - Ronak Y Patel
- Molecular and Human Genetics Department, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA
| | - Wendy M White
- Department of Obstetrics and Gynecology, Mayo Clinic College of Medicine, 200 1st Street SW, Rochester, MN 55905, USA
| | - Vesna D Garovic
- Division of Nephrology and Hypertension, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905, USA
| | - Steffi Oesterreich
- Department of Pharmacology and Chemical Biology, Magee Womens Research Institute, University of Pittsburgh Cancer Institute, 204 Craft Avenue, B705, Pittsburgh, PA 15213, USA
| | - Matt E Roth
- Molecular and Human Genetics Department, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA
| | - Adrian V Lee
- Department of Pharmacology and Chemical Biology, Magee Womens Research Institute, University of Pittsburgh Cancer Institute, 204 Craft Avenue, B705, Pittsburgh, PA 15213, USA
| | - Aleksandar Milosavljevic
- Molecular and Human Genetics Department, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA; Program in Structural and Computational Biology and Molecular Biophysics, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA.
| |
Collapse
|
55
|
Liu Y, Zhang Y, Mao X, Qi Q, Zhu M, Zhang C, Pan X, Ling Y. Palliative treatment efficacy of glucose inhibition combined with chemotherapy for non-small cell lung cancer with widespread bone and brain metastases: A case report. Biomed Rep 2017; 7:553-557. [PMID: 29250326 DOI: 10.3892/br.2017.1008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 09/22/2017] [Indexed: 01/01/2023] Open
Abstract
Otto Warburg observed in 1924 that cancer cells were dependent exclusively on glycolysis for the production of energy even in the presence of oxygen (the 'Warburg effect'). Consequently, cancer cells require ~19 times more glucose uptake to obtain equivalent amounts of energy as normal cells. The Warburg effect is the scientific basis for positron emission tomography (PET), which has markedly improved cancer detection. During chemotherapy, cancer cells may upregulate their expression of multi-drug resistance proteins and ultimately cause treatment failure. As multi-drug resistance proteins require energy to operate, the present report evaluated the potential clinical efficacy of lowering blood glucose with insulin during chemotherapy for a patient with advanced pulmonary adenocarcinoma with multiple metastases. A 64-year-old male was admitted to the Department of Medical Oncology at Changzhou Tumor Hospital (Changzhou, China) due to an irritating cough and multiple bone pain. PET/computed tomography (CT) with F-18 fluorodeoxy glucose (18F-FDG) identified multiple hypermetabolic foci in the right hilum, right upper lung, shoulder blades, thoracic vertebrae, lumbar, sacrum, bilateral iliac crest and pelvis. Additionally, magnetic resonance imaging detected multiple metastases in the brain. The patient received 56 repeat treatments with insulin to induce hypoglycemia combined with reduced doses of chemotherapy over an 8-month period. For each treatment, insulin at 0.2 U/kg body weight was injected intravenously (i.v.), and when blood glucose level reached 2.5-3.0 mmol/l, navelbine (10 mg), cisplatin (10 mg) and fluorouracil (250 mg) were injected (i.v.) over a period of ~10 min. The patient's blood glucose level was returned to normal immediately after chemotherapy with an i.v. injection of 20 ml 50% glucose solution. During the 8-month chemotherapy regimen, the patient received two PET/CT follow-ups. The results demonstrated that the levels of 18F-FDG uptake in all lesions had been reduced. In addition, the patient exhibited improved appetite and weight gain, a reduced cough, and had less pain. The levels of tumor markers, namely carcinoembryonic antigen, carcinoma antigen 15-3, CYRA21-1, neuron-specific enolase, also declined gradually. These results suggest that controlled, mild hypoglycemia may be safely combined with low dose chemotherapy to provide clinical benefit for advanced non-small cell lung cancer.
Collapse
Affiliation(s)
- Yongping Liu
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Yaping Zhang
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Xibao Mao
- Department of Nuclear Medicine, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Qiufeng Qi
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Ming Zhu
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Changsong Zhang
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Xuefeng Pan
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| | - Yang Ling
- Clinical Oncology Laboratory, Changzhou Tumor Hospital Affiliated to Soochow University, Changzhou, Jiangsu 213032, P.R. China
| |
Collapse
|
56
|
Qiao ZY, Lai WJ, Lin YX, Li D, Nan XH, Wang Y, Wang H, Fang QJ. Polymer–KLAK Peptide Conjugates Induce Cancer Cell Death through Synergistic Effects of Mitochondria Damage and Autophagy Blockage. Bioconjug Chem 2017; 28:1709-1721. [DOI: 10.1021/acs.bioconjchem.7b00176] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
| | | | - Yao-Xin Lin
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Dan Li
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xiao-Hui Nan
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yi Wang
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| | | | - Qiao-Jun Fang
- University of Chinese Academy of Sciences, Beijing 100049, PR China
| |
Collapse
|
57
|
Singh KK, Choudhury AR, Tiwari HK. Numtogenesis as a mechanism for development of cancer. Semin Cancer Biol 2017; 47:101-109. [PMID: 28511886 DOI: 10.1016/j.semcancer.2017.05.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 04/20/2017] [Accepted: 10/14/2016] [Indexed: 01/10/2023]
Abstract
Transfer of genetic material from cytoplasmic organelles to the nucleus, an ongoing process, has implications in evolution, aging, and human pathologies such as cancer. The transferred mitochondrial DNA (mtDNA) fragments in the nuclear genome are called nuclear mtDNA or NUMTs. We have named the process numtogenesis, defining the term as the transfer of mtDNA into the nuclear genome, or, less specifically, the transfer of mitochondria or mitochondrial components into the nucleus. There is increasing evidence of the involvement of NUMTs in human biology and pathology. Although information pertaining to NUMTs and numtogenesis is sparse, the role of this aspect of mitochondrial biology to human cancers is apparent. In this review, we present available knowledge about the origin and mechanisms of numtogenesis, with special emphasis on the role of NUMTs in human malignancies. We describe studies undertaken in our laboratory and in others and discuss the influence of NUMTs in tumor initiation and progression and in survival of cancer patients. We describe suppressors of numtogenesis and evolutionary conserved mechanisms underlying numtogenesis in cancer. An understanding the emerging field of numtogenesis should allow comprehension of this process in various malignancies and other diseases and, more generally, in human health.
Collapse
Affiliation(s)
- Keshav K Singh
- Departments of Genetics, Birmingham, AL, 35294, USA; Departments of Pathology, Birmingham, AL, 35294, USA; Departments of Environmental Health, Center for Free Radical Biology, Birmingham, AL, 35294, USA; Center for Aging, Birmingham, AL, 35294, USA; UAB Comprehensive Cancer Center, University of Alabama at Birmingham, AL, 35294, USA; Birmingham Veterans Affairs Medical Center, AL, 35294, USA.
| | | | - Hemant K Tiwari
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| |
Collapse
|
58
|
Döppler H, Storz P. Mitochondrial and Oxidative Stress-Mediated Activation of Protein Kinase D1 and Its Importance in Pancreatic Cancer. Front Oncol 2017; 7:41. [PMID: 28361035 PMCID: PMC5350125 DOI: 10.3389/fonc.2017.00041] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 03/01/2017] [Indexed: 12/31/2022] Open
Abstract
Due to alterations in their metabolic activity and decreased mitochondrial efficiency, cancer cells often show increased generation of reactive oxygen species (ROS), but at the same time, to avoid cytotoxic signaling and to facilitate tumorigenic signaling, have mechanism in place that keep ROS in check. This requires signaling molecules that convey increases in oxidative stress to signal to the nucleus to upregulate antioxidant genes. Protein kinase D1 (PKD1), the serine/threonine kinase, is one of these ROS sensors. In this mini-review, we highlight the mechanisms of how PKD1 is activated in response to oxidative stress, so far known downstream effectors, as well as the importance of PKD1-initiated signaling for development and progression of pancreatic cancer.
Collapse
Affiliation(s)
- Heike Döppler
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic , Jacksonville, FL , USA
| | - Peter Storz
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic , Jacksonville, FL , USA
| |
Collapse
|
59
|
Mori MP, Costa RAP, Soltys DT, Freire TDS, Rossato FA, Amigo I, Kowaltowski AJ, Vercesi AE, de Souza-Pinto NC. Lack of XPC leads to a shift between respiratory complexes I and II but sensitizes cells to mitochondrial stress. Sci Rep 2017; 7:155. [PMID: 28273955 PMCID: PMC5427820 DOI: 10.1038/s41598-017-00130-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 02/08/2017] [Indexed: 12/13/2022] Open
Abstract
Genomic instability drives tumorigenesis and DNA repair defects are associated with elevated cancer. Metabolic alterations are also observed during tumorigenesis, although a causal relationship between these has not been clearly established. Xeroderma pigmentosum (XP) is a DNA repair disease characterized by early cancer. Cells with reduced expression of the XPC protein display a metabolic shift from OXPHOS to glycolysis, which was linked to accumulation of nuclear DNA damage and oxidants generation via NOX-1. Using XP-C cells, we show that mitochondrial respiratory complex I (CI) is impaired in the absence of XPC, while complex II (CII) is upregulated in XP-C cells. The CI/CII metabolic shift was dependent on XPC, as XPC complementation reverted the phenotype. We demonstrate that mitochondria are the primary source of H2O2 and glutathione peroxidase activity is compromised. Moreover, mtDNA is irreversibly damaged and accumulates deletions. XP-C cells were more sensitive to the mitochondrial inhibitor antimycin A, an effect also prevented in XPC-corrected cells. Our results show that XPC deficiency leads to alterations in mitochondrial redox balance with a CI/CII shift as a possible adaptation to lower CI activity, but at the cost of sensitizing XP-C cells to mitochondrial oxidative stress.
Collapse
Affiliation(s)
- Mateus P Mori
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Rute A P Costa
- Department of Clinical Pathology, School of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Daniela T Soltys
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Thiago de S Freire
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Franco A Rossato
- Department of Clinical Pathology, School of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Ignácio Amigo
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Alicia J Kowaltowski
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Aníbal E Vercesi
- Department of Clinical Pathology, School of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Nadja C de Souza-Pinto
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil.
| |
Collapse
|
60
|
Mutant Kras- and p16-regulated NOX4 activation overcomes metabolic checkpoints in development of pancreatic ductal adenocarcinoma. Nat Commun 2017; 8:14437. [PMID: 28232723 PMCID: PMC5333128 DOI: 10.1038/ncomms14437] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 12/29/2016] [Indexed: 02/06/2023] Open
Abstract
Kras activation and p16 inactivation are required to develop pancreatic ductal adenocarcinoma (PDAC). However, the biochemical mechanisms underlying these double alterations remain unclear. Here we discover that NAD(P)H oxidase 4 (NOX4), an enzyme known to catalyse the oxidation of NAD(P)H, is upregulated when p16 is inactivated by looking at gene expression profiling studies. Activation of NOX4 requires catalytic subunit p22phox, which is upregulated following Kras activation. Both alterations are also detectable in PDAC cell lines and patient specimens. Furthermore, we show that elevated NOX4 activity accelerates oxidation of NADH and supports increased glycolysis by generating NAD+, a substrate for GAPDH-mediated glycolytic reaction, promoting PDAC cell growth. Mechanistically, NOX4 was induced through p16-Rb-regulated E2F and p22phox was induced by KrasG12V-activated NF-κB. In conclusion, we provide a biochemical explanation for the cooperation between p16 inactivation and Kras activation in PDAC development and suggest that NOX4 is a potential therapeutic target for PDAC. Kras activation and p16 inactivation cooperatively promote pancreatic cancer progression. Here, the authors show that such cooperation depends upon an increased expression of the NAD(P)H oxidase NOX4 achieved through transcription factors independently regulated by the two oncogenic genetic alterations.
Collapse
|
61
|
Singh B, Kulawiec M, Owens KM, Singh A, Singh KK. Sustained Early Disruption of Mitochondrial Function Contributes to Arsenic-Induced Prostate Tumorigenesis. BIOCHEMISTRY (MOSCOW) 2017; 81:1089-1100. [PMID: 27908234 DOI: 10.1134/s0006297916100072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Arsenic is a well-known human carcinogen that affects millions of people worldwide, but the underlying mechanisms of carcinogenesis are unclear. Several epidemiological studies have suggested increased prostate cancer incidence and mortality due to exposure to arsenic. Due to lack of an animal model of arsenic-induced carcinogenesis, we used a prostate epithelial cell culture model to identify a role for mitochondria in arsenic-induced prostate cancer. Mitochondrial morphology and membrane potential was impacted within a few hours of arsenic exposure of non-neoplastic prostate epithelial cells. Chronic arsenic treatment induced mutations in mitochondrial genes and altered mitochondrial functions. Human non-neoplastic prostate epithelial cells continuously cultured for seven months in the presence of 5 µM arsenite showed tumorigenic properties in vitro and induced tumors in SCID mice, which indicated transformation of these cells. Protein and mRNA expression of subunits of mtOXPHOS complex I were decreased in arsenic-transformed cells. Alterations in complex I, a main site for reactive oxygen species (ROS) production as well as increased expression of ROS-producing NOX4 in arsenic-transformed cells suggested a role of oxidative stress in tumorigenic transformation of prostate epithelial cells. Whole genome cGH array analyses of arsenic-transformed prostate cells identified extensive genomic instability. Our study revealed mitochondrial dysfunction induced oxidative stress and decreased expression of p53 in arsenic-transformed cells as an underlying mechanism of the mitochondrial and nuclear genomic instability. These studies suggest that early changes in mitochondrial functions are sustained during prolong arsenic exposure. Overall, our study provides evidence that arsenic disruption of mitochondrial function is an early and key step in tumorigenic transformation of prostate epithelial cells.
Collapse
Affiliation(s)
- B Singh
- University of Alabama at Birmingham, Department of Genetics, Birmingham, AL 35294, USA
| | | | | | | | | |
Collapse
|
62
|
Moreno-Loshuertos R, Enríquez JA. Respiratory supercomplexes and the functional segmentation of the CoQ pool. Free Radic Biol Med 2016; 100:5-13. [PMID: 27105951 DOI: 10.1016/j.freeradbiomed.2016.04.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 04/15/2016] [Accepted: 04/17/2016] [Indexed: 12/14/2022]
Abstract
The evidence accumulated during the last fifteen years on the existence of respiratory supercomplexes and their proposed functional implications has changed our understanding of the OXPHOS system complexity and regulation. The plasticity model is a point of encounter accounting for the apparently contradictory experimental observations claimed to support either the solid or the fluid models. It allows the explanation of previous observations such as the dependence between respiratory complexes, supercomplex assembly dynamics or the existence of different functional ubiquinone pools. With the general acceptation of respiratory supercomplexes as true entities, this review evaluates the supporting evidences in favor or against the existence of different ubiquinone pools and the relationship between supercomplexes, ROS production and pathology.
Collapse
Affiliation(s)
- Raquel Moreno-Loshuertos
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Pedro Cerbuna, 12, Zaragoza 50009, Spain
| | - José Antonio Enríquez
- Centro Nacional de Investigaciones Cardiovasculares Carlos III, Melchor Fernández Almagro, 3, 28029 Madrid, Spain; Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Pedro Cerbuna, 12, Zaragoza 50009, Spain.
| |
Collapse
|
63
|
Shanmugasundaram K, Block K. Renal Carcinogenesis, Tumor Heterogeneity, and Reactive Oxygen Species: Tactics Evolved. Antioxid Redox Signal 2016; 25:685-701. [PMID: 27287984 PMCID: PMC5069729 DOI: 10.1089/ars.2015.6569] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 06/07/2016] [Accepted: 06/10/2016] [Indexed: 12/13/2022]
Abstract
SIGNIFICANCE The number of kidney cancers is growing 3-5% each year due to unknown etiologies. Intra- and inter-tumor mediators increase oxidative stress and drive tumor heterogeneity. Recent Advances: Technology advancement in state-of-the-art instrumentation and methodologies allows researchers to detect and characterize global landscaping modifications in genes, proteins, and pathophysiology patterns at the single-cell level. CRITICAL ISSUES We postulate that the sources of reactive oxygen species (ROS) and their activation within subcellular compartments will change over a timeline of tumor evolvement and contribute to tumor heterogeneity. Therefore, the complexity of intracellular changes within a tumor and ROS-induced tumor heterogeneity coupled to the advancement of detecting these events globally are limited at the level of data collection, organization, and interpretation using software algorithms and bioinformatics. FUTURE DIRECTIONS Integrative and collaborative research, combining the power of numbers with careful experimental design, protocol development, and data interpretation, will translate cancer biology and therapeutics to a heightened level or leave the abundant raw data as stagnant and underutilized. Antioxid. Redox Signal. 25, 685-701.
Collapse
Affiliation(s)
| | - Karen Block
- Department of Medicine, University of Texas Health Science Center, San Antonio, Texas
- South Texas Veterans Health Care System, Audie L. Murphy Memorial Hospital Division, San Antonio, Texas
| |
Collapse
|
64
|
Chowdhury AR, Long A, Fuchs SY, Rustgi A, Avadhani NG. Mitochondrial stress-induced p53 attenuates HIF-1α activity by physical association and enhanced ubiquitination. Oncogene 2016; 36:397-409. [PMID: 27345397 PMCID: PMC5192009 DOI: 10.1038/onc.2016.211] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 03/22/2016] [Accepted: 04/26/2016] [Indexed: 12/17/2022]
Abstract
Retrograde signaling is a mechanism by which mitochondrial dysfunction is communicated to the nucleus for inducing a metabolic shift essential for cell survival. Previously we showed that partial mtDNA depletion in different cell types induced mitochondrial retrograde signaling pathway (MtRS) involving Ca+2 sensitive Calcineurin (Cn) activation as an immediate upstream event of stress response. In multiple cell types, this stress signaling was shown to induce tumorigenic phenotypes in immortalized cells. In this study we show that MtRS also induces p53 expression which was abrogated by Ca2+ chelators and shRNA mediated knock down of CnAβ mRNA. Mitochondrial dysfunction induced by mitochondrial ionophore, carbonyl cyanide m-chlorophenyl hydrazone (CCCP) and other respiratory inhibitors, which perturb the transmembrane potential, were equally efficient in inducing the expression of p53 and downregulation of MDM2. Stress-induced p53 physically interacted with HIF-1α and attenuated the latter’s binding to promoter DNA motifs. Additionally, p53 promoted ubiquitination and degradation of HIF-1α in partial mtDNA depleted cells. The mtDNA depleted cells, with inhibited HIF-1α, showed upregulation of glycolytic pathway genes, glucose transporter 1–4 (Glut1–4), phosphoglycerate kinase 1 (PGK1) and Glucokinase (GSK) but not of prolyl hydroxylase (PHD) isoforms. For the first time we show that p53 is induced as part of MtRS and it renders HIF-1α inactive by physical interaction. In this respect our results show that MtRS induces tumor growth independent of HIF-1α pathway.
Collapse
Affiliation(s)
- A Roy Chowdhury
- Department of Biomedical Sciences and Mari Lowe Center for Comparative Oncology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - A Long
- Division of Gastroenterology, Department of Medicine and Genetics, Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - S Y Fuchs
- Department of Biomedical Sciences and Mari Lowe Center for Comparative Oncology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - A Rustgi
- Division of Gastroenterology, Department of Medicine and Genetics, Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - N G Avadhani
- Department of Biomedical Sciences and Mari Lowe Center for Comparative Oncology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| |
Collapse
|
65
|
Enolase-1 is a therapeutic target in endometrial carcinoma. Oncotarget 2016; 6:15610-27. [PMID: 25951350 PMCID: PMC4558174 DOI: 10.18632/oncotarget.3639] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/10/2015] [Indexed: 12/14/2022] Open
Abstract
ENO1 plays a paradoxical role in driving the pathogenesis of tumors. However, the clinical significance of ENO1 expression remains unclear and its function and modulatory mechanisms have never been reported in endometrial carcinoma (EC). In this study, ENO1 silencing significantly reduced cell glycolysis, proliferation, migration, and invasion in vitro, as well as tumorigenesis and metastasis in vivo by modulating p85 suppression. This in turn mediated inactivation of PI3K/AKT signaling and its downstream signals including glycolysis, cell cycle progression, and epithelial-mesenchymal transition (EMT)-associated genes. These effects on glycolysis and cell growth were not observed after ENO1 suppression in normal human endometrial epithelial cells (HEEC). Knocking down ENO1 could significantly enhance the sensitivity of EC cells to cisplatin (DDP) and markedly inhibited the growth of EC xenografts in vivo. In clinical samples, EC tissues exhibited higher expression levels of ENO1 mRNA and protein compared with normal endometrium tissues. Patients with higher ENO1 expression had a markedly shorter overall survival than patients with low ENO1 expression. We conclude that ENO1 favors carcinogenesis, representing a potential target for gene-based therapy.
Collapse
|
66
|
Takeda D, Hasegawa T, Ueha T, Sakakibara A, Kawamoto T, Minamikawa T, Sakai Y, Komori T. Decreased mitochondrial copy numbers in oral squamous cell carcinoma. Head Neck 2016; 38:1170-5. [PMID: 27079936 DOI: 10.1002/hed.24194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 05/17/2015] [Accepted: 07/03/2015] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Mitochondrial dysfunction and altered respiration have long been suspected to affect the development and progression of cancer. Although quantitative changes in mitochondrial DNA (mtDNA) have been reported in head and neck squamous cell carcinoma (SCC), differences in mtDNA copy numbers between normal and cancerous tissues from same patients have not been assessed. METHODS We compared mtDNA copy numbers and expressions of peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1α) and mitochondrial transcription factor A (TFAM) between normal mucous membrane and cancerous tissues resected from 35 patients with oral SCC, using TaqMan quantitative real-time polymerase chain reaction (PCR) and immunohistochemical staining. RESULTS We found mtDNA copy numbers and expressions of PGC-1α and TFAM were decreased in cancerous tissues compared with normal tissues from the same patients. CONCLUSION The PGC-1α-TFAM mitochondrial pathway may be associated with malignant potential in human oral SCC, and could be an attractive therapeutic target. © 2016 Wiley Periodicals, Inc. Head Neck 38:1170-1175, 2016.
Collapse
Affiliation(s)
- Daisuke Takeda
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takumi Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takeshi Ueha
- Department of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akiko Sakakibara
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Teruya Kawamoto
- Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tsutomu Minamikawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshitada Sakai
- Department of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takahide Komori
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| |
Collapse
|
67
|
Gan L, Yan J, Liu Z, Feng M, Sun C. Adiponectin prevents reduction of lipid-induced mitochondrial biogenesis via AMPK/ACC2 pathway in chicken adipocyte. J Cell Biochem 2016; 116:1090-100. [PMID: 25536013 DOI: 10.1002/jcb.25064] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 12/18/2014] [Indexed: 12/11/2022]
Abstract
Adiponectin (APN) stimulates mitochondrial biogenesis and reduces lipid content in human and animal adipocytes. However, the mechanism of adiponectin in regulating mitochondrial biogenesis in chicken adipocytes has never been reported. The objective of this study is to examine the mechanism that adiponectin plays in lipid-induced mitochondrial biogenesis and mitochondrial function in chicken adipocytes. We found that the overexpression of adiponectin reduced the membrane DAG content and elevated the membrane translocation of PKCθ. In contrast to control groups, the overexpression of adiponectin increased mitochondrial density and mitochondrial DNA contents and peroxisome proliferator-activated receptor αcoactivator 1α (PGC1-α) expression. Mitochondrial membrane potential and cytochrome C (Cyt C) content were detected by JC-1 fluorescent staining and immunofluorescence which indicated that overexpression of adiponectin enhanced mitochondrial ATP synthesis. Moreover, AMPK/ACC2 signaling pathway was activated along with the elevation of PGC1-α and TFAM by the overexpression of adiponectin, meanwhile the lipid transcription marker genes were down-regulated. This effect was alleviated by reducing adiponectin and a specific inhibitor of AMPK pathway. We concluded that adiponectin could prevent reduction of lipid-induced mitochondrial biogenesis via AMPK/ACC2 pathway in chicken adipocytes.
Collapse
Affiliation(s)
- Lu Gan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | | | | | | | | |
Collapse
|
68
|
Stabilization of LKB1 and Akt by neddylation regulates energy metabolism in liver cancer. Oncotarget 2016; 6:2509-23. [PMID: 25650664 PMCID: PMC4385867 DOI: 10.18632/oncotarget.3191] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 12/10/2015] [Indexed: 12/22/2022] Open
Abstract
The current view of cancer progression highlights that cancer cells must undergo through a post-translational regulation and metabolic reprogramming to progress in an unfriendly environment. In here, the importance of neddylation modification in liver cancer was investigated. We found that hepatic neddylation was specifically enriched in liver cancer patients with bad prognosis. In addition, the treatment with the neddylation inhibitor MLN4924 in Phb1-KO mice, an animal model of hepatocellular carcinoma showing elevated neddylation, reverted the malignant phenotype. Tumor cell death in vivo translating into liver tumor regression was associated with augmented phosphatidylcholine synthesis by the PEMT pathway, known as a liver-specific tumor suppressor, and restored mitochondrial function and TCA cycle flux. Otherwise, in protumoral hepatocytes, neddylation inhibition resulted in metabolic reprogramming rendering a decrease in oxidative phosphorylation and concomitant tumor cell apoptosis. Moreover, Akt and LKB1, hallmarks of proliferative metabolism, were altered in liver cancer being new targets of neddylation. Importantly, we show that neddylation-induced metabolic reprogramming and apoptosis were dependent on LKB1 and Akt stabilization. Overall, our results implicate neddylation/signaling/metabolism, partly mediated by LKB1 and Akt, in the development of liver cancer, paving the way for novel therapeutic approaches targeting neddylation in hepatocellular carcinoma.
Collapse
|
69
|
Zhong ZF, Tan W, Qiang WW, Scofield VL, Tian K, Wang CM, Qiang WA, Wang YT. Furanodiene alters mitochondrial function in doxorubicin-resistant MCF-7 human breast cancer cells in an AMPK-dependent manner. MOLECULAR BIOSYSTEMS 2016; 12:1626-37. [DOI: 10.1039/c6mb00003g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Furanodiene is a bioactive sesquiterpene isolated from the spice-producing Curcuma wenyujin plant (Y. H. Chen and C. Ling) (C. wenyujin), which is a commonly prescribed herb used in clinical cancer therapy by modern practitioners of traditional Chinese medicine.
Collapse
Affiliation(s)
- Zhang-Feng Zhong
- Institute of Chinese Medical Sciences
- State Key Laboratory of Quality Research in Chinese Medicine
- University of Macau
- Avenida da Universidade
- Taipa
| | - Wen Tan
- School of Pharmacy
- Lanzhou University
- Lanzhou
- China
| | - William W. Qiang
- Institute of Chinese Medical Sciences
- State Key Laboratory of Quality Research in Chinese Medicine
- University of Macau
- Avenida da Universidade
- Taipa
| | - Virginia L. Scofield
- Department of Biomedical Sciences
- School of Medicine
- University of Texas Rio Grande Valley
- Edinburg
- USA
| | - Ke Tian
- School of Chinese Medicine
- Hong Kong Baptist University
- Hong Kong 999077
- China
- Division of Reproductive Science in Medicine
| | - Chun-Ming Wang
- Institute of Chinese Medical Sciences
- State Key Laboratory of Quality Research in Chinese Medicine
- University of Macau
- Avenida da Universidade
- Taipa
| | - Wen-An Qiang
- Division of Reproductive Science in Medicine
- Department of Obstetrics and Gynecology
- Feinberg School of Medicine at Northwestern University
- Chicago
- USA
| | - Yi-Tao Wang
- Institute of Chinese Medical Sciences
- State Key Laboratory of Quality Research in Chinese Medicine
- University of Macau
- Avenida da Universidade
- Taipa
| |
Collapse
|
70
|
Tian H, Gao Z, Wang G, Li H, Zheng J. Estrogen potentiates reactive oxygen species (ROS) tolerance to initiate carcinogenesis and promote cancer malignant transformation. Tumour Biol 2015; 37:141-50. [DOI: 10.1007/s13277-015-4370-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 11/03/2015] [Indexed: 12/25/2022] Open
|
71
|
Clanton R, Saucier D, Ford J, Akabani G. Microbial influences on hormesis, oncogenesis, and therapy: A review of the literature. ENVIRONMENTAL RESEARCH 2015; 142:239-256. [PMID: 26183884 DOI: 10.1016/j.envres.2015.06.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 06/11/2015] [Accepted: 06/23/2015] [Indexed: 06/04/2023]
Abstract
Utilization of environmental stimuli for growth is the main factor contributing to the evolution of prokaryotes and eukaryotes, independently and mutualistically. Epigenetics describes an organism's ability to vary expression of certain genes based on their environmental stimuli. The diverse degree of dose-dependent responses based on their variances in expressed genetic profiles makes it difficult to ascertain whether hormesis or oncogenesis has or is occurring. In the medical field this is shown where survival curves used in determining radiotherapeutic doses have substantial uncertainties, some as large as 50% (Barendsen, 1990). Many in-vitro radiobiological studies have been limited by not taking into consideration the innate presence of microbes in biological systems, which have either grown symbiotically or pathogenically. Present in-vitro studies neglect to take into consideration the varied responses that commensal and opportunistic pathogens will have when exposed to the same stimuli and how such responses could act as stimuli for their macro/microenvironment. As a result many theories such as radiation carcinogenesis explain microscopic events but fail to describe macroscopic events (Cohen, 1995). As such, this review shows how microorganisms have the ability to perturb risks of cancer and enhance hormesis after irradiation. It will also look at bacterial significance in the microenvironment of the tumor before and during treatment. In addition, bacterial systemic communication after irradiation and the host's immune responses to infection could explain many of the phenomena associated with bystander effects. Therefore, the present literature review considers the paradigms of hormesis and oncogenesis in order to find a rationale that ties them all together. This relationship was thus characterized to be the microbiome.
Collapse
Affiliation(s)
- Ryan Clanton
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA; Texas A&M Institute for Preclinical Studies, Texas A&M University, College Station, TX 77843, USA
| | - David Saucier
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA
| | - John Ford
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Gamal Akabani
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA; Texas A&M Institute for Preclinical Studies, Texas A&M University, College Station, TX 77843, USA
| |
Collapse
|
72
|
Impaired mitochondrial protein synthesis in head and neck squamous cell carcinoma. Mitochondrion 2015; 24:113-21. [DOI: 10.1016/j.mito.2015.07.123] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/24/2015] [Accepted: 07/29/2015] [Indexed: 01/31/2023]
|
73
|
Zhou Y, Lu N, Qiao C, Ni T, Li Z, Yu B, Guo Q, Wei L. FV-429 induces apoptosis and inhibits glycolysis by inhibiting Akt-mediated phosphorylation of hexokinase II in MDA-MB-231 cells. Mol Carcinog 2015; 55:1317-28. [PMID: 26258875 DOI: 10.1002/mc.22374] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 06/28/2015] [Accepted: 07/06/2015] [Indexed: 11/06/2022]
Abstract
In this study, the anticancer effect of a newly synthesized flavonoid FV-429, against human breast cancer MDA-MB-231 cells, and the underlying mechanisms were investigated. FV-429 triggered the apoptosis and simultaneously inhibited the glycolysis of MDA-MB-231 cells. Both the HK II activity and its level in mitochondria were significantly down regulated by FV-429. Moreover, FV-429 weakened the interaction between HKII and VDAC, stimulated the detachment of HK II from the mitochondria, and resulted in the opening of the mitochondrial permeability transition pores. Thus FV-429 induced the mitochondrial-mediated apoptosis, showing increased Bax/Bcl-2 ratio, loss of mitochondrial membrane potential (MMP) and activation of caspase-3 and -9, cytochrome c (Cyt c) release, and apoptosis inducing factor (AIF) transposition. Further research revealed that the phosphorylation of mitochondrial HKII via Akt was responsible for the dissociation of HKII and the decreased HKII activity induced by FV-429. Taken together, FV-429 inhibited the phosphorylation of HKII, down-regulated its activity, and stimulated the release of HKII from the mitochondria, resulting the inhibited glycolysis and mitochondrial-mediated apoptosis. The studies provide a molecular basis for the development of flavonoid compounds as novel anticancer agents for breast cancer. © 2015 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Yuxin Zhou
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| | - Na Lu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| | - Chen Qiao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| | - Ting Ni
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| | - Zhiyu Li
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| | - Boyang Yu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, 639# Long Mian Avenue, Nan Jing, P.R. China
| | - Qinglong Guo
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| | - Libin Wei
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Key Laboratory of Drug Quality Control and Pharmacovigilance, JiangSu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, P. R. China
| |
Collapse
|
74
|
Autophagy of mitochondria: a promising therapeutic target for neurodegenerative disease. Cell Biochem Biophys 2015; 70:707-19. [PMID: 24807843 DOI: 10.1007/s12013-014-0006-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The autophagic process is the only known mechanism for mitochondrial turnover and it has been speculated that dysfunction of autophagy may result in mitochondrial error and cellular stress. Emerging investigations have provided new understanding of how autophagy of mitochondria (also known as mitophagy) is associated with cellular oxidative stress and its impact on neurodegeneration. This impaired autophagic function may be considered as a possible mechanism in the pathogenesis of several neurodegenerative disorders including Parkinson's disease, Alzheimer's disease, multiple sclerosis, amyotrophic lateral sclerosis, and Huntington disease. It can be suggested that autophagy dysfunction along with oxidative stress is considered main events in neurodegenerative disorders. New therapeutic approaches have now begun to target mitochondria as a potential drug target. This review discusses evidence supporting the notion that oxidative stress and autophagy are intimately associated with neurodegenerative disease pathogenesis. This review also explores new approaches that can prevent mitochondrial dysfunction, improve neurodegenerative etiology, and also offer possible cures to the aforementioned neurodegenerative diseases.
Collapse
|
75
|
Ramanujan VK. Metabolic Plasticity in Cancer Cells: Reconnecting Mitochondrial Function to Cancer Control. JOURNAL OF CELL SCIENCE & THERAPY 2015; 6:211. [PMID: 26457230 PMCID: PMC4598183 DOI: 10.4172/2157-7013.1000211] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Anomalous increase in glycolytic activity defines one of the key metabolic alterations in cancer cells. A realization of this feature has led to critical advancements in cancer detection techniques such as positron emission tomography (PET) as well as a number of therapeutic avenues targeting the key glycolytic steps within a cancer cell. A normal healthy cell's survival relies on a sensitive balance between the primordial glycolysis and a more regulated mitochondrial bioenergetics. The salient difference between these two bioenergetics pathways is that oxygen availability is an obligatory requirement for mitochondrial pathway while glycolysis can function without oxygen. Early observations that some cancer cells up-regulate glycolytic activity even in the presence of oxygen (aerobic glycolysis) led to a hypothesis that such an altered cancer cell metabolism stems from inherent mitochondrial dysfunction. While a general validity of this hypothesis is still being debated, a number of recent research efforts have yielded clarity on the physiological origins of this aerobic glycolysis phenotype in cancer cells. Building on these recent studies, we present a generalized scheme of cancer cell metabolism and propose a novel hypothesis that might rationalize new avenues of cancer intervention.
Collapse
Affiliation(s)
- V. Krishnan Ramanujan
- Metabolic Photonics Laboratory, Department of Surgery, Biomedical Imaging Research Institute, Department of Biomedical Sciences, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA 90048, USA
| |
Collapse
|
76
|
Khan IA, Shaik NA, Pasupuleti N, Chava S, Jahan P, Hasan Q, Rao P. Screening of mitochondrial mutations and insertion-deletion polymorphism in gestational diabetes mellitus in the Asian Indian population. Saudi J Biol Sci 2015; 22:243-8. [PMID: 25972744 PMCID: PMC4423658 DOI: 10.1016/j.sjbs.2014.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 10/29/2014] [Accepted: 11/02/2014] [Indexed: 11/23/2022] Open
Abstract
In this study we scrutinized the association between the A8344G/A3243G mutations and a 9-bp deletion polymorphism with gestational diabetes mellitus (GDM) in an Asian Indian population. The A3243G mutation in the mitochondrial tRNA(Leu(UUR)) causes mitochondrial encephalopathy myopathy, lactic acidosis, and stroke-like episodes (MELAS), while the A8344G mutation in tRNA(Lys) causes myoclonus epilepsy with ragged red fibers (MERRF). We screened 140 pregnant women diagnosed with GDM and 140 non-GDM participants for these mutations by PCR-RFLP analysis. Both A3243G and A8344G were associated with GDM (A3243: OR-3.667, 95% CI = 1.001-13.43, p = 0.03; A8344G: OR-11.00, 95% CI = 0.6026-200.8, p = 0.04). Mitochondrial DNA mutations contribute to the development of GDM. Our results conclude that mitochondrial mutations are associated with the GDM women in our population. Thus it is important to screen other mitochondrial mutations in the GDM women.
Collapse
Affiliation(s)
- Imran Ali Khan
- Department of Genetics and Molecular Medicine, Kamineni Hospitals, LB Nagar, Hyderabad 500068, India
- Department of Genetics, Vasavi Medical and Research Centre, Lakdikapool, Hyderabad 500004, India
- Department of Genetics and Biotechnology, Osmania University, Tarnaka, Hyderabad 500007, India
| | - Noor Ahmad Shaik
- Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nagarjuna Pasupuleti
- Department of Genetics and Molecular Medicine, Kamineni Hospitals, LB Nagar, Hyderabad 500068, India
| | - Srinivas Chava
- Department of Genetics, Vasavi Medical and Research Centre, Lakdikapool, Hyderabad 500004, India
| | - Parveen Jahan
- Department of Genetics and Biotechnology, Osmania University, Tarnaka, Hyderabad 500007, India
| | - Qurratulain Hasan
- Department of Genetics and Molecular Medicine, Kamineni Hospitals, LB Nagar, Hyderabad 500068, India
- Department of Genetics, Vasavi Medical and Research Centre, Lakdikapool, Hyderabad 500004, India
| | - Pragna Rao
- Department of Biochemistry, Kasturba Medical College, Manipal University, Manipal 576104, Karnataka, India
| |
Collapse
|
77
|
Martire S, Mosca L, d'Erme M. PARP-1 involvement in neurodegeneration: A focus on Alzheimer's and Parkinson's diseases. Mech Ageing Dev 2015; 146-148:53-64. [PMID: 25881554 DOI: 10.1016/j.mad.2015.04.001] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/26/2015] [Accepted: 04/06/2015] [Indexed: 12/17/2022]
Abstract
DNA damage is the prime activator of the enzyme poly(ADP-ribose)polymerase1 (PARP-1) whose overactivation has been proven to be associated with the pathogenesis of numerous central nervous system disorders, such as ischemia, neuroinflammation, and neurodegenerative diseases. Under oxidative stress conditions PARP-1 activity increases, leading to an accumulation of ADP-ribose polymers and NAD(+) depletion, that induces energy crisis and finally cell death. This review aims to explain the contribution of PARP-1 in neurodegenerative diseases, focusing on Alzheimer's and Parkinson's disease, to stimulate further studies on this issue and thereby engage a new perspective regarding the design of possible therapeutic agents or the identification of biomarkers.
Collapse
Affiliation(s)
- Sara Martire
- Department of Biochemical Sciences, Sapienza University of Roma, Italy
| | - Luciana Mosca
- Department of Biochemical Sciences, Sapienza University of Roma, Italy
| | - Maria d'Erme
- Department of Biochemical Sciences, Sapienza University of Roma, Italy.
| |
Collapse
|
78
|
Fu QF, Liu Y, Fan Y, Hua SN, Qu HY, Dong SW, Li RL, Zhao MY, Zhen Y, Yu XL, Chen YY, Luo RC, Li R, Li LB, Deng XJ, Fang WY, Liu Z, Song X. Alpha-enolase promotes cell glycolysis, growth, migration, and invasion in non-small cell lung cancer through FAK-mediated PI3K/AKT pathway. J Hematol Oncol 2015; 8:22. [PMID: 25887760 PMCID: PMC4359783 DOI: 10.1186/s13045-015-0117-5] [Citation(s) in RCA: 181] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/09/2015] [Indexed: 02/04/2023] Open
Abstract
Background During tumor formation and expansion, increasing glucose metabolism is necessary for unrestricted growth of tumor cells. Expression of key glycolytic enzyme alpha-enolase (ENO1) is controversial and its modulatory mechanisms are still unclear in non-small cell lung cancer (NSCLC). Methods The expression of ENO1 was examined in NSCLC and non-cancerous lung tissues, NSCLC cell lines, and immortalized human bronchial epithelial cell (HBE) by quantitative real-time reverse transcription PCR (qRT-PCR), immunohistochemistry, and Western blot, respectively. The effects and modulatory mechanisms of ENO1 on cell glycolysis, growth, migration, invasion, and in vivo tumorigenesis and metastasis in nude mice were also analyzed. Results ENO1 expression was increased in NSCLC tissues in comparison to non-cancerous lung tissues. Similarly, NSCLC cell lines A549 and SPCA-1 also express higher ENO1 than HBE cell line in both mRNA and protein levels. Overexpressed ENO1 significantly elevated NSCLC cell glycolysis, proliferation, clone formation, migration, and invasion in vitro, as well as tumorigenesis and metastasis in vivo by regulating the expression of glycolysis, cell cycle, and epithelial-mesenchymal transition (EMT)-associated genes. Conversely, ENO1 knockdown reversed these effects. More importantly, our further study revealed that stably upregulated ENO1 activated FAK/PI3K/AKT and its downstream signals to regulate the glycolysis, cell cycle, and EMT-associated genes. Conclusion This study showed that ENO1 is responsible for NSCLC proliferation and metastasis; thus, ENO1 might serve as a potential molecular therapeutic target for NSCLC treatment. Electronic supplementary material The online version of this article (doi:10.1186/s13045-015-0117-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Qiao-Fen Fu
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Yan Liu
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Yue Fan
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Sheng-Ni Hua
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Hong-Ying Qu
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Su-Wei Dong
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Rui-Lei Li
- Department of Cancer Biotherapy Center, Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan, People's Republic China.
| | - Meng-Yang Zhao
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Yan Zhen
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Xiao-Li Yu
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Yi-Yu Chen
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Rong-Cheng Luo
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Rong Li
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Li-Bo Li
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Xiao-Jie Deng
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Wei-Yi Fang
- Cancer Center, Traditional Chinese Medicine-Integrated Hospital of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Zhen Liu
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Department of Pathology, Basic School of Guangzhou Medical University, Guangzhou, Guangdong, People's Republic China.
| | - Xin Song
- Cancer Research Institute of Southern Medical University, Guangzhou, Guangdong, People's Republic China. .,Department of Cancer Biotherapy Center, Third Affiliated Hospital of Kunming Medical University (Tumor Hospital of Yunnan Province), Kunming, Yunnan, People's Republic China.
| |
Collapse
|
79
|
Li Y, Lu Z, Liang Z, Ji D, Zhang P, Liu Q, Zheng X, Yao Y. Metastasis-associated in colon cancer-1 is associated with poor prognosis in hepatocellular carcinoma, partly by promoting proliferation through enhanced glucose metabolism. Mol Med Rep 2015; 12:426-34. [PMID: 25738944 DOI: 10.3892/mmr.2015.3416] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Accepted: 01/21/2015] [Indexed: 11/05/2022] Open
Abstract
Metastasis-associated in colon cancer-1 (MACC1) is a newly identified gene that is involved in the development and progression of hepatocellular carcinoma (HCC), however its investigation has not been comprehensive. In the present study, in vitro techniques, including immunohistochemistry, western blotting, reverse transcription quantitative polymerase chain reaction, metabolic assay, MTT assay, colony formation assay and prognostic analysis were used to confirm the involvement of MACC1 in HCC. Histological examination confirmed that the protein expression of MACC1 was upregulated in HCC and was associated with the hexokinase-2 (HK2) protein, which also indicates a poor prognosis. Knockdown of MACC1 induced the reduction of glycogen consumption and lactate production, which then lead to a marked reduction of proliferation in the MHCC-97H cells. However, the overexpression of MACC1 produced the opposite results in the HepG2 cells. These results suggested that MACC1 leads to a poor prognosis in HCC, partly by promoting proliferation via enhancement in glucose metabolism by HK2. Therefore, this pathway has the potential to become an important therapeutic target in HCC.
Collapse
Affiliation(s)
- Yaoqing Li
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Zhongtang Lu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Zheyong Liang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Dong Ji
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Pengfei Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Qingguang Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xin Zheng
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yingmin Yao
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of the Medical College of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| |
Collapse
|
80
|
Gao F, Li M, Liu WB, Zhou ZS, Zhang R, Li JL, Zhou KC. Epigallocatechin gallate inhibits human tongue carcinoma cells via HK2‑mediated glycolysis. Oncol Rep 2015; 33:1533-9. [PMID: 25591943 DOI: 10.3892/or.2015.3727] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 12/04/2014] [Indexed: 11/05/2022] Open
Abstract
Epigallocatechin gallate (EGCG), one of the major catechins found in green tea, was suggested to play a role as a chemopreventive agent in various human cancer models. In this study, we reported that EGCG has a profound antitumor effect on human tongue carcinoma cells by directly regulating glycolysis. EGCG dose-dependently inhibited anchorage-independent growth and short-term EGCG exposure substantially decreased EGF-induced EGF receptor (EGFR), Akt and ERK1/2 activation, as well as the downregulation of hexokinase 2 (HK2). Furthermore, inhibition of EGCG‑mediated HK2 expression was involved in Akt, but not in ERK1/2 signaling pathway suppression. Overexpression of constitutively activated Akt1 rescued inhibition of EGCG‑induced glycolysis. Moreover, EGCG inhibited HK2 expression on mitochondrial outer membrane and induced apoptosis. In summary, the results suggested that EGCG or a related analogue, may have a role in the management of human tongue carcinoma.
Collapse
Affiliation(s)
- Feng Gao
- Powder Metallurgy Research Institute of Central South University, Changsha, Hunan, P.R. China
| | - Ming Li
- Changsha Stomatological Hospital, Changsha, Hunan, P.R. China
| | - Wen-Bin Liu
- Department of Pathology, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Hunan Cancer Hospital, Changsha, Hunan, P.R. China
| | - Zhong-Su Zhou
- Changsha Stomatological Hospital, Changsha, Hunan, P.R. China
| | - Rui Zhang
- Changsha Stomatological Hospital, Changsha, Hunan, P.R. China
| | - Jun-Ling Li
- Department of Ultrasonography, The Third Xiangya Hospital of Central South University, Changsha, Hunan, P.R. China
| | - Ke-Chao Zhou
- Powder Metallurgy Research Institute of Central South University, Changsha, Hunan, P.R. China
| |
Collapse
|
81
|
Curcumin inhibits aerobic glycolysis and induces mitochondrial-mediated apoptosis through hexokinase II in human colorectal cancer cells in vitro. Anticancer Drugs 2015; 26:15-24. [DOI: 10.1097/cad.0000000000000132] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
82
|
Shokolenko IN, Wilson GL, Alexeyev MF. Aging: A mitochondrial DNA perspective, critical analysis and an update. World J Exp Med 2014; 4:46-57. [PMID: 25414817 PMCID: PMC4237642 DOI: 10.5493/wjem.v4.i4.46] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 07/15/2014] [Accepted: 08/31/2014] [Indexed: 02/06/2023] Open
Abstract
The mitochondrial theory of aging, a mainstream theory of aging which once included accumulation of mitochondrial DNA (mtDNA) damage by reactive oxygen species (ROS) as its cornerstone, has been increasingly losing ground and is undergoing extensive revision due to its inability to explain a growing body of emerging data. Concurrently, the notion of the central role for mtDNA in the aging process is being met with increased skepticism. Our progress in understanding the processes of mtDNA maintenance, repair, damage, and degradation in response to damage has largely refuted the view of mtDNA as being particularly susceptible to ROS-mediated mutagenesis due to its lack of “protective” histones and reduced complement of available DNA repair pathways. Recent research on mitochondrial ROS production has led to the appreciation that mitochondria, even in vitro, produce much less ROS than previously thought, automatically leading to a decreased expectation of physiologically achievable levels of mtDNA damage. New evidence suggests that both experimentally induced oxidative stress and radiation therapy result in very low levels of mtDNA mutagenesis. Recent advances provide evidence against the existence of the “vicious” cycle of mtDNA damage and ROS production. Meta-studies reveal no longevity benefit of increased antioxidant defenses. Simultaneously, exciting new observations from both comparative biology and experimental systems indicate that increased ROS production and oxidative damage to cellular macromolecules, including mtDNA, can be associated with extended longevity. A novel paradigm suggests that increased ROS production in aging may be the result of adaptive signaling rather than a detrimental byproduct of normal respiration that drives aging. Here, we review issues pertaining to the role of mtDNA in aging.
Collapse
|
83
|
Shoshan-Barmatz V, Ben-Hail D, Admoni L, Krelin Y, Tripathi SS. The mitochondrial voltage-dependent anion channel 1 in tumor cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1848:2547-75. [PMID: 25448878 DOI: 10.1016/j.bbamem.2014.10.040] [Citation(s) in RCA: 167] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 10/20/2014] [Accepted: 10/24/2014] [Indexed: 02/06/2023]
Abstract
VDAC1 is found at the crossroads of metabolic and survival pathways. VDAC1 controls metabolic cross-talk between mitochondria and the rest of the cell by allowing the influx and efflux of metabolites, ions, nucleotides, Ca2+ and more. The location of VDAC1 at the outer mitochondrial membrane also enables its interaction with proteins that mediate and regulate the integration of mitochondrial functions with cellular activities. As a transporter of metabolites, VDAC1 contributes to the metabolic phenotype of cancer cells. Indeed, this protein is over-expressed in many cancer types, and silencing of VDAC1 expression induces an inhibition of tumor development. At the same time, along with regulating cellular energy production and metabolism, VDAC1 is involved in the process of mitochondria-mediated apoptosis by mediating the release of apoptotic proteins and interacting with anti-apoptotic proteins. The engagement of VDAC1 in the release of apoptotic proteins located in the inter-membranal space involves VDAC1 oligomerization that mediates the release of cytochrome c and AIF to the cytosol, subsequently leading to apoptotic cell death. Apoptosis can also be regulated by VDAC1, serving as an anchor point for mitochondria-interacting proteins, such as hexokinase (HK), Bcl2 and Bcl-xL, some of which are also highly expressed in many cancers. By binding to VDAC1, HK provides both a metabolic benefit and apoptosis-suppressive capacity that offer the cell a proliferative advantage and increase its resistance to chemotherapy. Thus, these and other functions point to VDAC1 as an excellent target for impairing the re-programed metabolism of cancer cells and their ability to evade apoptosis. Here, we review current evidence pointing to the function of VDAC1 in cell life and death, and highlight these functions in relation to both cancer development and therapy. In addressing the recently solved 3D structures of VDAC1, this review will point to structure-function relationships of VDAC as critical for deciphering how this channel can perform such a variety of roles, all of which are important for cell life and death. Finally, this review will also provide insight into VDAC function in Ca2+ homeostasis, protection against oxidative stress, regulation of apoptosis and involvement in several diseases, as well as its role in the action of different drugs. We will discuss the use of VDAC1-based strategies to attack the altered metabolism and apoptosis of cancer cells. These strategies include specific siRNA able to impair energy and metabolic homeostasis, leading to arrested cancer cell growth and tumor development, as well VDAC1-based peptides that interact with anti-apoptotic proteins to induce apoptosis, thereby overcoming the resistance of cancer cell to chemotherapy. Finally, small molecules targeting VDAC1 can induce apoptosis. VDAC1 can thus be considered as standing at the crossroads between mitochondrial metabolite transport and apoptosis and hence represents an emerging cancer drug target. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
Collapse
Affiliation(s)
- Varda Shoshan-Barmatz
- Department of Life Sciences, and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
| | - Danya Ben-Hail
- Department of Life Sciences, and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Lee Admoni
- Department of Life Sciences, and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Yakov Krelin
- Department of Life Sciences, and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Shambhoo Sharan Tripathi
- Department of Life Sciences, and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| |
Collapse
|
84
|
Ozden O, Park SH, Wagner BA, Song HY, Zhu Y, Vassilopoulos A, Jung B, Buettner GR, Gius D. SIRT3 deacetylates and increases pyruvate dehydrogenase activity in cancer cells. Free Radic Biol Med 2014; 76:163-172. [PMID: 25152236 PMCID: PMC4364304 DOI: 10.1016/j.freeradbiomed.2014.08.001] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 07/10/2014] [Accepted: 08/05/2014] [Indexed: 12/15/2022]
Abstract
Pyruvate dehydrogenase E1α (PDHA1) is the first component enzyme of the pyruvate dehydrogenase (PDH) complex that transforms pyruvate, via pyruvate decarboxylation, into acetyl-CoA that is subsequently used by both the citric acid cycle and oxidative phosphorylation to generate ATP. As such, PDH links glycolysis and oxidative phosphorylation in normal as well as cancer cells. Herein we report that SIRT3 interacts with PDHA1 and directs its enzymatic activity via changes in protein acetylation. SIRT3 deacetylates PDHA1 lysine 321 (K321), and a PDHA1 mutant mimicking a deacetylated lysine (PDHA1(K321R)) increases PDH activity, compared to the K321 acetylation mimic (PDHA1(K321Q)) or wild-type PDHA1. Finally, PDHA1(K321Q) exhibited a more transformed in vitro cellular phenotype compared to PDHA1(K321R). These results suggest that the acetylation of PDHA1 provides another layer of enzymatic regulation, in addition to phosphorylation, involving a reversible acetyllysine, suggesting that the acetylome, as well as the kinome, links glycolysis to respiration.
Collapse
Affiliation(s)
- Ozkan Ozden
- Department of Radiation Oncology, Robert Lurie Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Seong-Hoon Park
- Department of Radiation Oncology, Robert Lurie Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Brett A. Wagner
- Department of Radiation Oncology, Free Radical and Radiation Biology, The University of Iowa, Iowa City, IA 52242
| | - Ha Yong Song
- Department of Radiation Oncology, Robert Lurie Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Yueming Zhu
- Department of Radiation Oncology, Robert Lurie Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Athanassios Vassilopoulos
- Department of Radiation Oncology, Robert Lurie Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Barbara Jung
- Department of Medicine, Division of Gastroenterology and Hepatology, University of Illinois at Chicago, Chicago, IL 60612
| | - Garry R. Buettner
- Department of Radiation Oncology, Free Radical and Radiation Biology, The University of Iowa, Iowa City, IA 52242
| | - David Gius
- Department of Radiation Oncology, Robert Lurie Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
- Corresponding Author: David Gius, M.D., Ph.D. Professor Department of Radiation Oncology Robert Lurie Cancer Center Northwestern University 303 East Superior, Rm 3-119 Chicago, IL 60611
| |
Collapse
|
85
|
Li JZ, Ke Y, Misra HP, Trush MA, Li YR, Zhu H, Jia Z. Mechanistic studies of cancer cell mitochondria- and NQO1-mediated redox activation of beta-lapachone, a potentially novel anticancer agent. Toxicol Appl Pharmacol 2014; 281:285-93. [PMID: 25448047 DOI: 10.1016/j.taap.2014.10.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/12/2014] [Accepted: 10/21/2014] [Indexed: 11/24/2022]
Abstract
UNLABELLED Beta-lapachone (beta-Lp) derived from the Lapacho tree is a potentially novel anticancer agent currently under clinical trials. Previous studies suggested that redox activation of beta-Lp catalyzed by NAD(P)H quinone oxidoreductase 1 (NQO1) accounted for its killing of cancer cells. However, the exact mechanisms of this effect remain largely unknown. Using chemiluminescence and electron paramagnetic resonance (EPR) spin-trapping techniques, this study for the first time demonstrated the real-time formation of ROS in the redox activation of beta-lapachone from cancer cells mediated by mitochondria and NQO1 in melanoma B16-F10 and hepatocellular carcinoma HepG2 cancer cells. ES936, a highly selective NQO1 inhibitor, and rotenone, a selective inhibitor of mitochondrial electron transport chain (METC) complex I were found to significantly block beta-Lp meditated redox activation in B16-F10 cells. In HepG2 cells ES936 inhibited beta-Lp-mediated oxygen radical formation by ~80% while rotenone exerted no significant effect. These results revealed the differential contribution of METC and NQO1 to beta-lapachone-induced ROS formation and cancer cell killing. In melanoma B16-F10 cells that do not express high NQO1 activity, both NOQ1 and METC play a critical role in beta-Lp redox activation. In contrast, in hepatocellular carcinoma HepG2 cells expressing extremely high NQO1 activity, redox activation of beta-Lp is primarily mediated by NQO1 (METC plays a minor role). These findings will contribute to our understanding of how cancer cells are selectively killed by beta-lapachone and increase our ability to devise strategies to enhance the anticancer efficacy of this potentially novel drug while minimizing its possible adverse effects on normal cells.
Collapse
Affiliation(s)
| | - Yuebin Ke
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | | | - Michael A Trush
- Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - Y Robert Li
- Campbell University School of Osteopathic Medicine, Buies Creek, NC, USA; Virginia Tech-Wake Forest University SBES, Blacksburg, VA, USA; Department of Biology, University of North Carolina at Greensboro, NC, USA
| | - Hong Zhu
- Campbell University School of Osteopathic Medicine, Buies Creek, NC, USA.
| | - Zhenquan Jia
- Department of Biology, University of North Carolina at Greensboro, NC, USA.
| |
Collapse
|
86
|
Stromal-epithelial metabolic coupling in gastric cancer: Stromal MCT4 and mitochondrial TOMM20 as poor prognostic factors. Eur J Surg Oncol 2014; 40:1361-8. [DOI: 10.1016/j.ejso.2014.04.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/03/2014] [Accepted: 04/03/2014] [Indexed: 11/20/2022] Open
|
87
|
Wang C, Wang Y, Wang H, Zhang R, Guo Z. Mitochondrial DNA haplogroup N is associated good outcome of gastric cancer. Tumour Biol 2014; 35:12555-9. [PMID: 25201064 DOI: 10.1007/s13277-014-2575-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 08/29/2014] [Indexed: 12/23/2022] Open
Abstract
Accumulation of mutations and single nucleotide polymorphisms (SNPs) in the displacement loop (D-loop) of mitochondrial DNA (mtDNA) has been identified for their association with cancer risk and disease outcome in a variety of cancers. We have identified cancer risk-associated D-loop SNPs in gastric cancer patients. In this study, we evaluated the predictive value of these SNPs for cancer outcome. Two SNP sites of nucleotides 489C/T and 523-524AC/del were identified for statistically significant prediction of postoperative survival in gastric cancer by univariate analysis with log-rank test. In addition, the mitochondrial DNA haplogroup N (489T) contributed to the good survival of gastric cancer patients compared with the mitochondrial DNA haplogroup M (489C) genotype (relative risk, 1.753; 95 %CI, 1.005-3.060; p = 0.048) by multivariate analysis with COX hazards model. In conclusion, analysis of genetic polymorphisms in the mitochondrial D-loop can help identify subgroups of patients who are at a high risk of a poor disease outcome.
Collapse
Affiliation(s)
- Cuiju Wang
- Department of Gynaecology Ultrasound, The Fourth Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | | | | | | | | |
Collapse
|
88
|
Sorrentino G, Comel A, Mantovani F, Del Sal G. Regulation of mitochondrial apoptosis by Pin1 in cancer and neurodegeneration. Mitochondrion 2014; 19 Pt A:88-96. [PMID: 25132079 DOI: 10.1016/j.mito.2014.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 08/08/2014] [Accepted: 08/11/2014] [Indexed: 11/15/2022]
Abstract
Mitochondria are sensitive and efficient organelles that regulate essential biological processes including: energy metabolism, decoding and transduction of intracellular signals, and balance between cell death and survival. Of note, dysfunctions in mitochondrial physiology are a general hallmark of cancer cells, leading to transformation-related features such as altered cellular metabolism, survival under stress conditions and reduced apoptotic response to chemotherapy. Mitochondrial apoptosis is a finely regulated process that derives from activation of multiple signaling networks. A crucial biochemical requirement for transducing pro-apoptotic stimuli is represented by kinase-dependent phosphorylation cascades. In this context a pivotal role is played by the prolyl-isomerase Pin1, which translates Ser/Thr-Pro phosphorylation into conformational changes able to modify the activities of its substrates. In this review we will discuss the impact of Pin1 in regulating various aspects of apoptosis in different biological contexts with particular emphasis on cancer and neurodegenerative diseases.
Collapse
Affiliation(s)
- Giovanni Sorrentino
- Laboratorio Nazionale CIB Area Science Park, Trieste Italy; Dipartimento di Scienze della Vita Università degli Studi di Trieste- Trieste Italy
| | - Anna Comel
- Laboratorio Nazionale CIB Area Science Park, Trieste Italy; Dipartimento di Scienze della Vita Università degli Studi di Trieste- Trieste Italy
| | - Fiamma Mantovani
- Laboratorio Nazionale CIB Area Science Park, Trieste Italy; Dipartimento di Scienze della Vita Università degli Studi di Trieste- Trieste Italy
| | - Giannino Del Sal
- Laboratorio Nazionale CIB Area Science Park, Trieste Italy; Dipartimento di Scienze della Vita Università degli Studi di Trieste- Trieste Italy.
| |
Collapse
|
89
|
Hosnijeh FS, Lan Q, Rothman N, San Liu C, Cheng WL, Nieters A, Guldberg P, Tjønneland A, Campa D, Martino A, Boeing H, Trichopoulou A, Lagiou P, Trichopoulos D, Krogh V, Tumino R, Panico S, Masala G, Weiderpass E, Huerta Castaño JM, Ardanaz E, Sala N, Dorronsoro M, Quirós JR, Sánchez MJ, Melin B, Johansson AS, Malm J, Borgquist S, Peeters PH, Bueno-de-Mesquita HB, Wareham N, Khaw KT, Travis RC, Brennan P, Siddiq A, Riboli E, Vineis P, Vermeulen R. Mitochondrial DNA copy number and future risk of B-cell lymphoma in a nested case-control study in the prospective EPIC cohort. Blood 2014; 124:530-5. [PMID: 24899624 PMCID: PMC4110659 DOI: 10.1182/blood-2013-10-532085] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 05/06/2014] [Indexed: 01/10/2023] Open
Abstract
It has been suggested that mitochondrial dysfunction and DNA damage are involved in lymphomagenesis. Increased copy number of mitochondrial DNA (mtDNA) as a compensatory mechanism of mitochondrial dysfunction previously has been associated with B-cell lymphomas, in particular chronic lymphocytic leukemia (CLL). However, current evidence is limited and based on a relatively small number of cases. Using a nested case-control study, we extended these findings with a focus on subtype-specific analyses. Relative mtDNA copy number was measured in the buffy coat of prospectively collected blood of 469 lymphoma cases and 469 matched controls. The association between mtDNA copy number and the risk of developing lymphoma and histologic subtypes was examined using logistic regression models. We found no overall association between mtDNA and risk of lymphoma. Subtype analyses revealed significant increased risks of CLL (n = 102) with increasing mtDNA copy number (odds ratio = 1.34, 1.44, and 1.80 for quartiles 2-4, respectively; P trend = .001). mtDNA copy number was not associated with follow-up time, suggesting that this observation is not strongly influenced by indolent disease status. This study substantially strengthens the evidence that mtDNA copy number is related to risk of CLL and supports the importance of mitochondrial dysfunction as a possible mechanistic pathway in CLL ontogenesis.
Collapse
Affiliation(s)
- Fatemeh Saberi Hosnijeh
- Institute for Risk Assessment Sciences, Division Environmental Epidemiology, Utrecht University, Utrecht, The Netherlands; Zanjan University of Medical Sciences, Zanjan, Iran
| | - Qing Lan
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD
| | - Nathaniel Rothman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD
| | - Chin San Liu
- Department of Neurology and Vascular and Genomic Center, Changhua Christian Hospital, Changhua, Taiwan; Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Wen-Ling Cheng
- Laboratory of Mitochondrial Medicine, Chunghua Christian Hospital, Taipei, Taiwan
| | - Alexandra Nieters
- Centre of Chronic Immunodeficiency, University Medical Centre Freiburg, Freiburg, Germany
| | - Per Guldberg
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | | | - Daniele Campa
- Genomic Epidemiology Group, German Cancer Research Center, Heidelberg, Germany
| | - Alessandro Martino
- Genomic Epidemiology Group, German Cancer Research Center, Heidelberg, Germany
| | - Heiner Boeing
- Department of Epidemiology, German Institute of Human Nutrition, Potsdam-Rehbrücke, Nuthetal, Germany
| | - Antonia Trichopoulou
- Hellenic Health Foundation, Athens, Greece; WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece
| | - Pagona Lagiou
- WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece; Department of Epidemiology, Harvard School of Public Health, Boston, MA; Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece
| | - Dimitrios Trichopoulos
- Hellenic Health Foundation, Athens, Greece; Department of Epidemiology, Harvard School of Public Health, Boston, MA; Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece
| | - Vittorio Krogh
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Rosario Tumino
- Cancer Registry and Histopathology Unit, "Civic - M.P. Arezzo" Hospital, ASP Ragusa, Italy
| | - Salvatore Panico
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Giovanna Masala
- Molecular and Nutritional Epidemiology Unit, ISPO Cancer Research and Prevention Institute, Florence, Italy
| | - Elisabete Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway; Department of Research, Cancer Registry of Norway, Oslo, Norway; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Samfundet Folkhälsan, Helsinki, Finland
| | - José María Huerta Castaño
- Department of Epidemiology, Murcia Regional Health Council, Murcia, Spain; CIBER Epidemiology and Public Health CIBERESP, Spain
| | - Eva Ardanaz
- CIBER Epidemiology and Public Health CIBERESP, Spain; Navarre Public Health Institute, Pamplona, Spain
| | - Núria Sala
- Translational Research Laboratory and Unit of Nutrition, Environment and Cancer Research Program in Cancer Epidemiology, Catalan Institute of Oncology, Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Miren Dorronsoro
- Public Health Direction and Biodonostia Research Institute Ciberesp, Basque Regional Health Department, Vitoria, Spain
| | | | - María-José Sánchez
- CIBER Epidemiology and Public Health CIBERESP, Spain; Andalusian School of Public Health, Granada, Spain; Instituto de Investigación Biosanitario de Granada, Granada, Spain
| | - Beatrice Melin
- Department of Radiation Sciences, Oncology Umeå University, Umeå, Sweden
| | | | - Johan Malm
- Department of Laboratory Medicine, Clinical Chemistry, Lund University, Malmö, Sweden; Skåne University Hospital, Malmö, Sweden
| | - Signe Borgquist
- Division of Oncology, Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - Petra H Peeters
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht
| | - H Bas Bueno-de-Mesquita
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands; Department of Gastroenterology and Hepatology, University Medical Centre, Utrecht, The Netherlands; The School of Public Health, Imperial College London, London, United Kingdom
| | - Nick Wareham
- MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, United Kingdom; School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Kay-Tee Khaw
- School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Ruth C Travis
- Cancer Epidemiology Unit, University of Oxford, Oxford, United Kingdom
| | - Paul Brennan
- Genetics Section, International Agency for Research on Cancer, Lyon, France
| | - Afshan Siddiq
- Department of Genomics of Common Disease, School of Public Health, Imperial College London, London, United Kingdom
| | - Elio Riboli
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom; and
| | - Paolo Vineis
- The School of Public Health, Imperial College London, London, United Kingdom; Human Genetics Foundation, Turin, Italy
| | - Roel Vermeulen
- Institute for Risk Assessment Sciences, Division Environmental Epidemiology, Utrecht University, Utrecht, The Netherlands; Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht
| |
Collapse
|
90
|
Huang C, Xue M, Chen H, Jiao J, Herschman HR, O'Keefe RJ, Zhang X. The spatiotemporal role of COX-2 in osteogenic and chondrogenic differentiation of periosteum-derived mesenchymal progenitors in fracture repair. PLoS One 2014; 9:e100079. [PMID: 24988184 PMCID: PMC4079554 DOI: 10.1371/journal.pone.0100079] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/21/2014] [Indexed: 12/16/2022] Open
Abstract
Periosteum provides a major source of mesenchymal progenitor cells for bone fracture repair. Combining cell-specific targeted Cox-2 gene deletion approaches with in vitro analyses of the differentiation of periosteum-derived mesenchymal progenitor cells (PDMPCs), here we demonstrate a spatial and temporal role for Cox-2 function in the modulation of osteogenic and chondrogenic differentiation of periosteal progenitors in fracture repair. Prx1Cre-targeted Cox-2 gene deletion in mesenchyme resulted in marked reduction of intramembraneous and endochondral bone repair, leading to accumulation of poorly differentiated mesenchyme and immature cartilage in periosteal callus. In contrast, Col2Cre-targeted Cox-2 gene deletion in cartilage resulted in a deficiency primarily in cartilage conversion into bone. Further cell culture analyses using Cox-2 deficient PDMPCs demonstrated reduced osteogenic differentiation in monolayer cultures, blocked chondrocyte differentiation and hypertrophy in high density micromass cultures. Gene expression microarray analyses demonstrated downregulation of a key set of genes associated with bone/cartilage formation and remodeling, namely Sox9, Runx2, Osx, MMP9, VDR and RANKL. Pathway analyses demonstrated dysregulation of the HIF-1, PI3K-AKT and Wnt pathways in Cox-2 deficient cells. Collectively, our data highlight a crucial role for Cox-2 from cells of mesenchymal lineages in modulating key pathways that control periosteal progenitor cell growth, differentiation, and angiogenesis in fracture repair.
Collapse
Affiliation(s)
- Chunlan Huang
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Ming Xue
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Hongli Chen
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Jing Jiao
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
| | - Harvey R. Herschman
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
| | - Regis J. O'Keefe
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Xinping Zhang
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, New York, United States of America
- * E-mail:
| |
Collapse
|
91
|
Mitochondrial ROS and involvement of Bcl-2 as a mitochondrial ROS regulator. Mitochondrion 2014; 19 Pt A:39-48. [PMID: 24954615 DOI: 10.1016/j.mito.2014.06.002] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 06/06/2014] [Accepted: 06/12/2014] [Indexed: 12/22/2022]
Abstract
Mitochondria are the major intracellular source of reactive oxygen species (ROS). While excessive mitochondrial ROS (mitoROS) production induces cell injury and death, there is accumulating evidence that non-toxic low levels of mitoROS could serve as important signaling molecules. Therefore, maintenance of mitoROS at physiological levels is crucial for cell homeostasis as well as for survival and proliferation. This review describes the various mechanisms that keep mitoROS in check, with particular focus on the role of the onco-protein Bcl-2 in redox regulation. In addition to its canonical anti-apoptotic activity, Bcl-2 has been implicated in mitoROS regulation by its effect on mitochondrial complex IV activity, facilitating the mitochondrial incorporation of GSH and interaction with the small GTPase-Rac1 at the mitochondria. We also discuss some of the plausible mechanism(s) which allows Bcl-2 to sense and respond to the fluctuations in mitoROS.
Collapse
|
92
|
Abstract
PURPOSE OF REVIEW The purpose of this review is to highlight recent studies on mammalian sirtuins that coordinately regulate cellular metabolic homeostasis upon fasting and to summarize the beneficial effects of fasting on carcinogenesis and cancer therapy. RECENT FINDINGS Recent studies have demonstrated that fasting may protect normal cells and mice from the metabolic conditions that are harmful as well as decrease the incidence of carcinogenesis. Fasting could also slow the tumor growth and augment the efficacy of certain systemic agents/chemotherapy drugs in various cancers. The mechanism behind this proposed idea may be due to, at least in some part, the metabolic regulation by Sirtuin family proteins whose functions are involved in specific aspects of longevity, stress response and metabolism. Sirtuins, particularly SIRT1 and SIRT3, can be activated by fasting and further exhibit their effects in insulin response, antioxidant defense, and glycolysis. Therefore, sirtuins may have anticancer effects by shifting metabolism to a less proliferative cell phenotype as well as less prone to oxidative stress attack. SUMMARY The in-depth understanding of the essential role of sirtuins in fasting process may have significant implications in developing a new metabolic diagram of cancer prevention or treatment.
Collapse
|
93
|
Targeting Epstein-Barr virus oncoprotein LMP1-mediated glycolysis sensitizes nasopharyngeal carcinoma to radiation therapy. Oncogene 2014; 33:4568-78. [PMID: 24662831 PMCID: PMC4162460 DOI: 10.1038/onc.2014.32] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 11/26/2013] [Accepted: 12/16/2013] [Indexed: 12/13/2022]
Abstract
Our goal in this work was to illustrate the Epstein-Barr virus (EBV)-modulated global biochemical profile and provide a novel metabolism-related target to improve the therapeutic regimen of nasopharyngeal carcinoma (NPC). We used a metabolomics approach to investigate EBV-modulated metabolic changes, and found that the exogenous overexpression of the EBV-encoded latent membrane protein 1 (LMP1) significantly increased glycolysis. The deregulation of several glycolytic genes, including hexokinase 2 (HK2), was determined to be responsible for the reprogramming of LMP1-mediated glucose metabolism in NPC cells. The upregulation of HK2 elevated aerobic glycolysis and facilitated proliferation by blocking apoptosis. More importantly, HK2 was positively correlated with LMP1 in NPC biopsies, and high HK2 levels were significantly associated with poor overall survival of NPC patients following radiation therapy. Knockdown of HK2 effectively enhanced the sensitivity of LMP1-overexpressing NPC cells to irradiation. Finally, c-Myc was demonstrated to be required for LMP1-induced upregulation of HK2. The LMP1-mediated attenuation of the PI3-K/Akt-GSK3beta-FBW7 signaling axis resulted in the stabilization of c-Myc. These findings indicate a close relationship between EBV and glycolysis in NPC. Notably, LMP1 is the key regulator of the reprogramming of EBV-mediated glycolysis in NPC cells. Given the importance of EBV-mediated deregulation of glycolysis, anti-glycolytic therapy might represent a worthwhile avenue of exploration in the treatment of EBV-related cancers.
Collapse
|
94
|
Othman EM, Hintzsche H, Stopper H. Signaling steps in the induction of genomic damage by insulin in colon and kidney cells. Free Radic Biol Med 2014; 68:247-57. [PMID: 24355212 DOI: 10.1016/j.freeradbiomed.2013.12.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 11/20/2013] [Accepted: 12/09/2013] [Indexed: 12/22/2022]
Abstract
Diabetes mellitus (DM), a disease with almost 350 million people affected worldwide, will be the seventh leading cause of death by 2030. Diabetic patients develop various types of complications, among them an increased rate of malignancies. Studies reported the strong correlation between DM and several cancer types, of which colon and kidney cancers are the most common. Hyperinsulinemia, the high insulin blood level characteristic of early diabetes type 2, was identified as a risk factor for cancer development. In previous studies, we showed that an elevated insulin level can induce oxidative stress, resulting in DNA damage in colon cells in vitro and in kidney cells in vitro and in vivo. In the present study, we elucidate the signaling pathway of insulin-mediated genotoxicity, which is effective through oxidative stress induction in colon and kidney. The signaling mechanism is starting by phosphorylation of the insulin and insulin-like growth factor-1 receptors, followed by activation of phosphatidylinositide 3-kinase (PI3K), which in turn activates AKT. Subsequently, mitochondria and nicotinamide adenine dinucleotide phosphate oxidase (NADPH) isoforms (Nox1 and Nox4 in colon and kidney, respectively) are activated for reactive oxygen species (ROS) production, and the resulting excess ROS can attack the DNA, causing DNA oxidation. We conclude that hyperinsulinemia represents an important risk factor for cancer initiation or progression as well as a target for cancer prevention in diabetic patients.
Collapse
Affiliation(s)
- Eman Maher Othman
- Institute of Pharmacology and Toxicology, University of Wuerzburg, D-97078 Wuerzburg, Germany; Department of Analytical Chemistry, Faculty of Pharmacy, University of El-Minia, 61519 El-Minia, Egypt
| | - Henning Hintzsche
- Institute of Pharmacology and Toxicology, University of Wuerzburg, D-97078 Wuerzburg, Germany
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Wuerzburg, D-97078 Wuerzburg, Germany.
| |
Collapse
|
95
|
Lettieri Barbato D, Vegliante R, Desideri E, Ciriolo MR. Managing lipid metabolism in proliferating cells: new perspective for metformin usage in cancer therapy. Biochim Biophys Acta Rev Cancer 2014; 1845:317-24. [PMID: 24569230 DOI: 10.1016/j.bbcan.2014.02.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 02/18/2014] [Indexed: 01/01/2023]
Abstract
Cancer cells metabolically adapt to undergo cellular proliferation. Lipids, besides their well-known role as energy storage, represent the major building blocks for the synthesis of neo-generated membranes. There is increasing evidence that cancer cells show specific alterations in different aspects of lipid metabolism. The changes of expression and activity of lipid metabolising enzymes are directly regulated by the activity of oncogenic signals. The dependence of tumour cells on the deregulated lipid metabolism suggests that proteins involved in this process could be excellent chemotherapeutic targets for cancer treatment. Due to its rare side effects in non-cancerous cells, metformin has been recently revaluated as a potential anti-tumourigenic drug, which negatively affects lipid biosynthetic pathways. In this review we summarised the emerging molecular events linking the anti-proliferative effect of metformin with lipid metabolism in cancer cells.
Collapse
Affiliation(s)
- Daniele Lettieri Barbato
- Dept. of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Rolando Vegliante
- Dept. of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Enrico Desideri
- Dept. of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Maria Rosa Ciriolo
- Dept. of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy; IRCCS San Raffaele, Biochemistry of Ageing, Via di Val Cannuta, 00166 Rome, Italy.
| |
Collapse
|
96
|
High expression of leucine zipper-EF-hand containing transmembrane protein 1 predicts poor prognosis in head and neck squamous cell carcinoma. BIOMED RESEARCH INTERNATIONAL 2014; 2014:850316. [PMID: 24689060 PMCID: PMC3933037 DOI: 10.1155/2014/850316] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 12/14/2013] [Indexed: 12/13/2022]
Abstract
Leucine zipper-EF-hand containing transmembrane protein 1 (LETM1) is a mitochondrial inner membrane protein and plays an important role in mitochondrial ATP production and biogenesis. High expression levels of LETM1 have been correlated with numerous human malignancies. This study explored the clinicopathological significance of LETM1 expression as a prognostic determinant in head and neck squamous cell carcinoma (HNSCC). HNSCC samples from 176 patients were selected for immunohistochemical staining of LETM1 protein. Correlations between LETM1 overexpression and clinicopathological features of HNSCC were evaluated by Chi-squared tests and Fisher's exact tests, and relationships between prognostic factors and patient survival were analyzed using Cox proportional hazards models. Our results demonstrated that the strongly positive rate of LETM1 protein was 65.3% in HNSCC, which was significantly higher than in either adjacent nontumor tissue (25.0%) or normal squamous epithelia (6.7%). LETM1 overexpression correlated with poor differentiation, presence of lymph node metastasis, advanced stage, absence of chemoradiotherapy, and 5-year disease-free survival and overall survival rates in HNSCC. Further analysis showed that high LETM1 expression, advanced stage, and nonchemoradiotherapy were significant independent risk factors for mortality in HNSCC. In conclusion, LETM1 plays an important role in the progression of HNSCC and is an independent poor prognostic factor for HNSCC.
Collapse
|
97
|
Yadav N, Chandra D. Mitochondrial and postmitochondrial survival signaling in cancer. Mitochondrion 2013; 16:18-25. [PMID: 24333692 DOI: 10.1016/j.mito.2013.11.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 11/23/2013] [Accepted: 11/26/2013] [Indexed: 12/11/2022]
Abstract
Cancer cells are resistant to conventional chemotherapy and radiotherapy, however, the molecular mechanisms of resistance to therapy remain unclear. Cellular survival machinery protects mitochondrial integrity against endogenous or exogenous stresses. Prodeath molecules orchestrate around mitochondria to initiate and execute cell death in cancer, and also play an underappreciated role in survival of cancer cells. Prosurvival mechanisms can operate at mitochondrial and postmitochondrial levels to attenuate core apoptotic death program. It is intriguing to explore how prosurvival and prodeath molecules crosstalk to regulate mitochondrial functions leading to increased cancer cell survival. This review describes some putative survival mechanisms at mitochondria, which may play a role in designing effective agents for cancer prevention and therapy. These survival pathways may also have significance in understanding other human pathophysiological conditions including diabetes, cardiovascular, autoimmune, and neurodegenerative diseases.
Collapse
Affiliation(s)
- Neelu Yadav
- Department of Pharmacology Therapeutics, Roswell Park Cancer Institute, Buffalo, NY, United States
| | - Dhyan Chandra
- Department of Pharmacology Therapeutics, Roswell Park Cancer Institute, Buffalo, NY, United States.
| |
Collapse
|
98
|
Fan J, Kamphorst JJ, Mathew R, Chung MK, White E, Shlomi T, Rabinowitz JD. Glutamine-driven oxidative phosphorylation is a major ATP source in transformed mammalian cells in both normoxia and hypoxia. Mol Syst Biol 2013; 9:712. [PMID: 24301801 PMCID: PMC3882799 DOI: 10.1038/msb.2013.65] [Citation(s) in RCA: 315] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 10/18/2013] [Indexed: 02/08/2023] Open
Abstract
Mammalian cells can generate ATP via glycolysis or mitochondrial respiration. Oncogene activation and hypoxia promote glycolysis and lactate secretion. The significance of these metabolic changes to ATP production remains however ill defined. Here, we integrate LC-MS-based isotope tracer studies with oxygen uptake measurements in a quantitative redox-balanced metabolic flux model of mammalian cellular metabolism. We then apply this approach to assess the impact of Ras and Akt activation and hypoxia on energy metabolism. Both oncogene activation and hypoxia induce roughly a twofold increase in glycolytic flux. Ras activation and hypoxia also strongly decrease glucose oxidation. Oxidative phosphorylation, powered substantially by glutamine-driven TCA turning, however, persists and accounts for the majority of ATP production. Consistent with this, in all cases, pharmacological inhibition of oxidative phosphorylation markedly reduces energy charge, and glutamine but not glucose removal markedly lowers oxygen uptake. Thus, glutamine-driven oxidative phosphorylation is a major means of ATP production even in hypoxic cancer cells.
Collapse
Affiliation(s)
- Jing Fan
- Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Jurre J Kamphorst
- Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Robin Mathew
- The Cancer Institute of New Jersey, New Brunswick, NJ, USA
- University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | - Michelle K Chung
- Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Eileen White
- The Cancer Institute of New Jersey, New Brunswick, NJ, USA
- University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ, USA
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ, USA
| | - Tomer Shlomi
- Department of Computer Science, Technion, Haifa, Israel
| | - Joshua D Rabinowitz
- Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
- The Cancer Institute of New Jersey, New Brunswick, NJ, USA
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| |
Collapse
|
99
|
Li W, Peng C, Lee MH, Lim D, Zhu F, Fu Y, Yang G, Sheng Y, Xiao L, Dong X, Ma W, Bode AM, Cao Y, Dong Z. TRAF4 is a critical molecule for Akt activation in lung cancer. Cancer Res 2013; 73:6938-50. [PMID: 24154876 DOI: 10.1158/0008-5472.can-13-0913] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
TRAF4 is an adapter protein overexpressed in certain cancers, but its contributions to tumorigenesis are unclear. In lung cancer cells and primary lung tumors, we found that TRAF4 is overexpressed. RNA interference-mediated attenuation of TRAF4 expression blunted the malignant phenotype in this setting, exerting inhibitory effects on cell proliferation, anchorage-independent growth, and tumor development in a xenograft mouse model. Unexpectedly, we discovered that TRAF4, but not Skp2, was required for activation of the pivotal cell survival kinase Akt through ubiquitination. Furthermore, TRAF4 attenuation impaired glucose metabolism by inhibiting expression of Glut1 and HK2 mediated by the Akt pathway. Overall, our work suggests that TRAF4 offers a candidate molecular target for lung cancer prevention and therapy.
Collapse
Affiliation(s)
- Wei Li
- Authors' Affiliations: The Hormel Institute, University of Minnesota, Austin, Minnesota; Cancer Research Institute, Xiangya School of Medicine; Xiangya Hospital, Central South University, Changsha, Hunan; The First Affiliated Hospital; and Physiology and Pathophysiology, Basic Medical School, Zhengzhou University, Zhengzhou, Henan, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
100
|
Mitochondrial DNA mutations and breast tumorigenesis. Biochim Biophys Acta Rev Cancer 2013; 1836:336-44. [PMID: 24140413 DOI: 10.1016/j.bbcan.2013.10.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 10/02/2013] [Accepted: 10/05/2013] [Indexed: 12/15/2022]
Abstract
Breast cancer is a heterogeneous disease and genetic factors play an important role in its genesis. Although mutations in tumor suppressors and oncogenes encoded by the nuclear genome are known to play a critical role in breast tumorigenesis, the contribution of the mitochondrial genome to this process is unclear. Like the nuclear genome, the mitochondrial genome also encodes proteins critical for mitochondrion functions such as oxidative phosphorylation (OXPHOS), which is known to be defective in cancer including breast cancer. Mitochondrial DNA (mtDNA) is more susceptible to mutations due to limited repair mechanisms compared to nuclear DNA (nDNA). Thus changes in mitochondrial genes could also contribute to the development of breast cancer. In this review we discuss mtDNA mutations that affect OXPHOS. Continuous acquisition of mtDNA mutations and selection of advantageous mutations ultimately leads to generation of cells that propagate uncontrollably to form tumors. Since irreversible damage to OXPHOS leads to a shift in energy metabolism towards enhanced aerobic glycolysis in most cancers, mutations in mtDNA represent an early event during breast tumorigenesis, and thus may serve as potential biomarkers for early detection and prognosis of breast cancer. Because mtDNA mutations lead to defective OXPHOS, development of agents that target OXPHOS will provide specificity for preventative and therapeutic agents against breast cancer with minimal toxicity.
Collapse
|