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Peng X, He Z, Yuan D, Liu Z, Rong P. Lactic acid: The culprit behind the immunosuppressive microenvironment in hepatocellular carcinoma. Biochim Biophys Acta Rev Cancer 2024; 1879:189164. [PMID: 39096976 DOI: 10.1016/j.bbcan.2024.189164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 07/25/2024] [Accepted: 07/28/2024] [Indexed: 08/05/2024]
Abstract
As a solid tumor with high glycolytic activity, hepatocellular carcinoma (HCC) produces excess lactic acid and increases extracellular acidity, thus forming a unique immunosuppressive microenvironment. L-lactate dehydrogenase (LDH) and monocarboxylate transporters (MCTs) play a very important role in glycolysis. LDH is the key enzyme for lactic acid (LA) production, and MCT is responsible for the cellular import and export of LA. The synergistic effect of the two promotes the formation of an extracellular acidic microenvironment. In the acidic microenvironment of HCC, LA can not only promote the proliferation, survival, transport and angiogenesis of tumor cells but also have a strong impact on immune cells, ultimately leading to an inhibitory immune microenvironment. This article reviews the role of LA in HCC, especially its effect on immune cells, summarizes the progress of LDH and MCT-related drugs, and highlights the potential of immunotherapy targeting lactate combined with HCC.
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Affiliation(s)
- Xiaopei Peng
- Department of Radiology, the Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China; Molecular Imaging Research Center, Central South University, Changsha, Hunan 410013, China
| | - Zhenhu He
- Department of Radiology, the Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China; Molecular Imaging Research Center, Central South University, Changsha, Hunan 410013, China
| | - Dandan Yuan
- Department of Radiology, the Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China; Molecular Imaging Research Center, Central South University, Changsha, Hunan 410013, China
| | - Zhenguo Liu
- Department of Infectious Disease, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China
| | - Pengfei Rong
- Department of Radiology, the Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China; Molecular Imaging Research Center, Central South University, Changsha, Hunan 410013, China.
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2
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Chen LY, Shen YA, Chu LH, Su PH, Wang HC, Weng YC, Lin SF, Wen KC, Liew PL, Lai HC. Active DNA Demethylase, TET1, Increases Oxidative Phosphorylation and Sensitizes Ovarian Cancer Stem Cells to Mitochondrial Complex I Inhibitor. Antioxidants (Basel) 2024; 13:735. [PMID: 38929174 PMCID: PMC11200674 DOI: 10.3390/antiox13060735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/04/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024] Open
Abstract
Ten-eleven translocation 1 (TET1) is a methylcytosine dioxygenase involved in active DNA demethylation. In our previous study, we demonstrated that TET1 reprogrammed the ovarian cancer epigenome, increased stem properties, and activated various regulatory networks, including metabolic networks. However, the role of TET1 in cancer metabolism remains poorly understood. Herein, we uncovered a demethylated metabolic gene network, especially oxidative phosphorylation (OXPHOS). Contrary to the concept of the Warburg effect in cancer cells, TET1 increased energy production mainly using OXPHOS rather than using glycolysis. Notably, TET1 increased the mitochondrial mass and DNA copy number. TET1 also activated mitochondrial biogenesis genes and adenosine triphosphate production. However, the reactive oxygen species levels were surprisingly decreased. In addition, TET1 increased the basal and maximal respiratory capacities. In an analysis of tricarboxylic acid cycle metabolites, TET1 increased the levels of α-ketoglutarate, which is a coenzyme of TET1 dioxygenase and may provide a positive feedback loop to modify the epigenomic landscape. TET1 also increased the mitochondrial complex I activity. Moreover, the mitochondrial complex I inhibitor, which had synergistic effects with the casein kinase 2 inhibitor, affected ovarian cancer growth. Altogether, TET1-reprogrammed ovarian cancer stem cells shifted the energy source to OXPHOS, which suggested that metabolic intervention might be a novel strategy for ovarian cancer treatment.
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Grants
- MOST 109-2314-B-038-052-MY3 Ministry of Science and Technology, Taiwan
- MOST 108-2314-B-038-096 Ministry of Science and Technology, Taiwan
- MOST 110-2314-B-038-060 Ministry of Science and Technology, Taiwan
- MOST 111-2314-B-038-108-MY3 Ministry of Science and Technology, Taiwan
- MOST 110- 471 2314-B-038-059 Ministry of Science and Technology, Taiwan
- MOST 110-2635-B-038-001 Ministry of Science and Technology, Taiwan
- MOST 109-2314-B-038-021-MY3 Ministry of Science and Technology, Taiwan
- 109TMU-SHH-20 Taipei Medical University-Shuang Ho Hospital, Taiwan
- TMU109-AE1-B22 Taipei Medical University, Taiwan
- MOST 109-2314-B-038-107-MY3 Ministry of Science and Technology, Taiwan
- MOST 111-2320-B-038-023-MY3 Ministry of Science and Technology, Taiwan
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Affiliation(s)
- Lin-Yu Chen
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan; (L.-Y.C.); (L.-H.C.); (K.-C.W.)
| | - Yao-An Shen
- Department of Pathology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan;
- Graduate Institute of Clinical Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Ling-Hui Chu
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan; (L.-Y.C.); (L.-H.C.); (K.-C.W.)
| | - Po-Hsuan Su
- College of Health Technology, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan;
| | - Hui-Chen Wang
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan
| | - Yu-Chun Weng
- Translational Epigenetics Center, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
| | - Shiou-Fu Lin
- Department of Pathology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan;
| | - Kuo-Chang Wen
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan; (L.-Y.C.); (L.-H.C.); (K.-C.W.)
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Phui-Ly Liew
- Department of Pathology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan;
- Department of Pathology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan;
| | - Hung-Cheng Lai
- Department of Obstetrics and Gynecology, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan; (L.-Y.C.); (L.-H.C.); (K.-C.W.)
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Department of Obstetrics and Gynecology, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan
- Translational Epigenetics Center, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
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3
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Braun LA, Varpetyan EE, Zav’yalov GA, Kulikov FV, Marievskii VE, Tyul’ganova DA, Shishnenko AO, Stepanova DS, Shimanovskii NL. Metabolic Enzymes: New Targets for the Design of Antitumor Drugs. Pharm Chem J 2020. [DOI: 10.1007/s11094-020-02238-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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4
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Yang H, Shu Z, Jiang Y, Mao W, Pang L, Redwood A, Jeter-Jones SL, Jennings NB, Ornelas A, Zhou J, Rodriguez-Aguayo C, Bartholomeusz G, Iles LR, Zacharias NM, Millward SW, Lopez-Berestein G, Le XF, Ahmed AA, Piwnica-Worms H, Sood AK, Bast RC, Lu Z. 6-Phosphofructo-2-Kinase/Fructose-2,6-Biphosphatase-2 Regulates TP53-Dependent Paclitaxel Sensitivity in Ovarian and Breast Cancers. Clin Cancer Res 2019; 25:5702-5716. [PMID: 31391192 DOI: 10.1158/1078-0432.ccr-18-3448] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 02/21/2019] [Accepted: 06/13/2019] [Indexed: 01/23/2023]
Abstract
PURPOSE Paclitaxel is an integral component of primary therapy for breast and epithelial ovarian cancers, but less than half of these cancers respond to the drug. Enhancing the response to primary therapy with paclitaxel could improve outcomes for women with both diseases.Experimental Design: Twelve kinases that regulate metabolism were depleted in multiple ovarian and breast cancer cell lines to determine whether they regulate sensitivity to paclitaxel in Sulforhodamine B assays. The effects of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 2 (PFKFB2) depletion on cell metabolomics, extracellular acidification rate, nicotinamide adenine dinucleotide phosphate, reactive oxygen species (ROS), and apoptosis were studied in multiple ovarian and breast cancer cell lines. Four breast and ovarian human xenografts and a breast cancer patient-derived xenograft (PDX) were used to examine the knockdown effect of PFKFB2 on tumor cell growth in vivo. RESULTS Knockdown of PFKFB2 inhibited clonogenic growth and enhanced paclitaxel sensitivity in ovarian and breast cancer cell lines with wild-type TP53 (wtTP53). Silencing PFKFB2 significantly inhibited tumor growth and enhanced paclitaxel sensitivity in four xenografts derived from two ovarian and two breast cancer cell lines, and prolonged survival in a triple-negative breast cancer PDX. Transfection of siPFKFB2 increased the glycolysis rate, but decreased the flow of intermediates through the pentose-phosphate pathway in cancer cells with wtTP53, decreasing NADPH. ROS accumulated after PFKFB2 knockdown, which stimulated Jun N-terminal kinase and p53 phosphorylation, and induced apoptosis that depended upon upregulation of p21 and Puma. CONCLUSIONS PFKFB2 is a novel target whose inhibition can enhance the effect of paclitaxel-based primary chemotherapy upon ovarian and breast cancers retaining wtTP53.
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Affiliation(s)
- Hailing Yang
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Zhang Shu
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas.,Department of Geriatric Digestive Surgery, the Second Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yongying Jiang
- Institute for Applied Cancer Science, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Weiqun Mao
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Lan Pang
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Abena Redwood
- Department of Experimental Radiation Oncology, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Sabrina L Jeter-Jones
- Department of Experimental Radiation Oncology, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Nicholas B Jennings
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Argentina Ornelas
- Cancer Systems Imaging, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Jinhua Zhou
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Cristian Rodriguez-Aguayo
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas.,Center for RNA Interference and Non-Coding RNA Cancer, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Geoffrey Bartholomeusz
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - LaKesla R Iles
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Niki M Zacharias
- Department of Urology, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Steven W Millward
- Cancer Systems Imaging, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Gabriel Lopez-Berestein
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas.,Center for RNA Interference and Non-Coding RNA Cancer, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Xiao-Feng Le
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Ahmed A Ahmed
- Ovarian Cancer Cell Laboratory, Weatherall Institute of Molecular Medicine, University of Oxford, Headington, Oxford, United Kingdom.,Nuffield Department of Women's & Reproductive Health, University of Oxford, Women's Centre, John Radcliffe Hospital, Oxford, United Kingdom
| | - Helen Piwnica-Worms
- Department of Experimental Radiation Oncology, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas, MD Anderson Cancer Center, Houston, Texas.,Center for RNA Interference and Non-Coding RNA Cancer, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Robert C Bast
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas.
| | - Zhen Lu
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, Houston, Texas.
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5
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Gao Y, Shen J, Choy E, Mankin H, Hornicek F, Duan Z. Inhibition of CDK4 sensitizes multidrug resistant ovarian cancer cells to paclitaxel by increasing apoptosiss. Cell Oncol (Dordr) 2017; 40:209-218. [PMID: 28243976 DOI: 10.1007/s13402-017-0316-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2017] [Indexed: 12/14/2022] Open
Abstract
PURPOSE Overexpression of cyclin-dependent kinase (CDK) 4 has been observed in a variety of cancers and has been found to contribute to tumor cell growth and proliferation. However, the effect of inhibition of CDK4 in ovarian cancer is unknown. We investigated the therapeutic effect of the CDK4 inhibitor palbociclib in combination with paclitaxel in ovarian cancer cells. METHODS Cell viabilities were determined by MTT assay after exposure to different dosages of palbociclib and/or paclitaxel. Western blot, immunofluorescence, and Calcein AM assays were conducted to determine the mechanisms underlying the cytotoxic effects of palbociclib in combination with paclitaxel. CDK4 siRNA was used to validate the outcome of targeting CDK4 by palbociclib in ovarian cancer cells. RESULTS We found that combinations of palbociclib and paclitaxel significantly enhanced drug sensitivity in both Rb-positive (SKOV3TR) and Rb-negative (OVCAR8TR) ovarian cancer-derived cells. When combined with paclitaxel, palbociclib induced apoptosis in both SKOV3TR and OVCAR8TR cells. We also found that palbociclib inhibited the activity of P-glycoprotein (Pgp), and that siRNA-mediated CDK4 knockdown sensitized multidrug resistant (MDR) SKOV3TR and OVCAR8TR cells to paclitaxel. CONCLUSIONS Inhibition of CDK4 by palbociclib can enhance paclitaxel sensitivity in both Rb-positive and Rb-negative MDR ovarian cancer cells by increasing apoptosis. CDK4 may serve as a promising target in the treatment of ovarian cancer.
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Affiliation(s)
- Yan Gao
- Department of Clinical Laboratory Diagnostics, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.,Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom St, Jackson 1115, Boston, MA, 02114, USA
| | - Jacson Shen
- Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom St, Jackson 1115, Boston, MA, 02114, USA
| | - Edwin Choy
- Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom St, Jackson 1115, Boston, MA, 02114, USA
| | - Henry Mankin
- Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom St, Jackson 1115, Boston, MA, 02114, USA
| | - Francis Hornicek
- Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom St, Jackson 1115, Boston, MA, 02114, USA
| | - Zhenfeng Duan
- Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom St, Jackson 1115, Boston, MA, 02114, USA.
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6
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Lee SY, Jeong EK, Ju MK, Jeon HM, Kim MY, Kim CH, Park HG, Han SI, Kang HS. Induction of metastasis, cancer stem cell phenotype, and oncogenic metabolism in cancer cells by ionizing radiation. Mol Cancer 2017; 16:10. [PMID: 28137309 PMCID: PMC5282724 DOI: 10.1186/s12943-016-0577-4] [Citation(s) in RCA: 354] [Impact Index Per Article: 50.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 12/25/2016] [Indexed: 12/12/2022] Open
Abstract
Radiation therapy is one of the major tools of cancer treatment, and is widely used for a variety of malignant tumours. Radiotherapy causes DNA damage directly by ionization or indirectly via the generation of reactive oxygen species (ROS), thereby destroying cancer cells. However, ionizing radiation (IR) paradoxically promotes metastasis and invasion of cancer cells by inducing the epithelial-mesenchymal transition (EMT). Metastasis is a major obstacle to successful cancer therapy, and is closely linked to the rates of morbidity and mortality of many cancers. ROS have been shown to play important roles in mediating the biological effects of IR. ROS have been implicated in IR-induced EMT, via activation of several EMT transcription factors—including Snail, HIF-1, ZEB1, and STAT3—that are activated by signalling pathways, including those of TGF-β, Wnt, Hedgehog, Notch, G-CSF, EGFR/PI3K/Akt, and MAPK. Cancer cells that undergo EMT have been shown to acquire stemness and undergo metabolic changes, although these points are debated. IR is known to induce cancer stem cell (CSC) properties, including dedifferentiation and self-renewal, and to promote oncogenic metabolism by activating these EMT-inducing pathways. Much accumulated evidence has shown that metabolic alterations in cancer cells are closely associated with the EMT and CSC phenotypes; specifically, the IR-induced oncogenic metabolism seems to be required for acquisition of the EMT and CSC phenotypes. IR can also elicit various changes in the tumour microenvironment (TME) that may affect invasion and metastasis. EMT, CSC, and oncogenic metabolism are involved in radioresistance; targeting them may improve the efficacy of radiotherapy, preventing tumour recurrence and metastasis. This study focuses on the molecular mechanisms of IR-induced EMT, CSCs, oncogenic metabolism, and alterations in the TME. We discuss how IR-induced EMT/CSC/oncogenic metabolism may promote resistance to radiotherapy; we also review efforts to develop therapeutic approaches to eliminate these IR-induced adverse effects.
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Affiliation(s)
- Su Yeon Lee
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Pusan, 609-735, Korea
| | - Eui Kyong Jeong
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Pusan, 609-735, Korea
| | - Min Kyung Ju
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Pusan, 609-735, Korea
| | - Hyun Min Jeon
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Pusan, 609-735, Korea
| | - Min Young Kim
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Pusan, 619-953, Korea
| | - Cho Hee Kim
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Pusan, 609-735, Korea.,DNA Identification Center, National Forensic Service, Seoul, 158-707, Korea
| | - Hye Gyeong Park
- Nanobiotechnology Center, Pusan National University, Pusan, 609-735, Korea
| | - Song Iy Han
- The Division of Natural Medical Sciences, College of Health Science, Chosun University, Gwangju, 501-759, Korea
| | - Ho Sung Kang
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Pusan, 609-735, Korea.
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7
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Chavez-Gonzalez A, Bakhshinejad B, Pakravan K, Guzman ML, Babashah S. Novel strategies for targeting leukemia stem cells: sounding the death knell for blood cancer. Cell Oncol (Dordr) 2016; 40:1-20. [PMID: 27678246 DOI: 10.1007/s13402-016-0297-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Cancer stem cells (CSCs), also known as tumor-initiating cells (TICs), are characterized by high self-renewal and multi-lineage differentiation capacities. CSCs are thought to play indispensable roles in the initiation, progression and metastasis of many types of cancer. Leukemias are thought to be initiated and maintained by a specific sub-type of CSC, the leukemia stem cell (LSC). An important feature of LSCs is their resistance to standard therapy, which may lead to relapse. Increasing efforts are aimed at developing novel therapeutic strategies that selectively target LSCs, while sparing their normal counterparts and, thus, minimizing adverse treatment-associated side-effects. These LSC targeting therapies aim to eradicate LSCs through affecting mechanisms that control their survival, self-renewal, differentiation, proliferation and cell cycle progression. Some LSC targeting therapies have already been proven successful in pre-clinical studies and they are now being tested in clinical studies, mainly in combination with conventional treatment regimens. CONCLUSIONS A growing body of evidence indicates that the selective targeting of LSCs represents a promising approach to improve disease outcome. Beyond doubt, the CSC hypothesis has added a new dimension to the area of anticancer research, thereby paving the way for shaping a new trend in cancer therapy.
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Affiliation(s)
| | - Babak Bakhshinejad
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-154, Tehran, Iran
| | - Katayoon Pakravan
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-154, Tehran, Iran
| | - Monica L Guzman
- Department of Medicine, Weill Medical College of Cornell University, 1300 York Ave, Box 113, New York, NY, 10065, USA.
| | - Sadegh Babashah
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box: 14115-154, Tehran, Iran.
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8
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Cidlinsky N, Dogliotti G, Pukrop T, Jung R, Weber F, Krahn MP. Inactivation of the LKB1-AMPK signaling pathway does not contribute to salivary gland tumor development - a short report. Cell Oncol (Dordr) 2016; 39:389-96. [PMID: 27480082 DOI: 10.1007/s13402-016-0290-8] [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] [Accepted: 07/15/2016] [Indexed: 01/05/2023] Open
Abstract
PURPOSE Activation of AMPK by the tumor suppressor LKB1 represents an essential gatekeeping step for cells under energetic stress to prevent their growth and proliferation by inhibiting mTOR activation, until the energy supply normalizes. The LKB1/AMPK pathway is frequently downregulated in various types of cancer, thereby uncoupling tumor cell growth and proliferation from energy supply. As yet, little information is available on the role of the LKB1/AMPK pathway in tumors derived from salivary gland tissues. METHODS We performed LKB1 protein expression and AMPK and mTOR activation analyses in several salivary gland tumor types and their respective healthy control tissues using immunohistochemistry. RESULTS No significant downregulation of LKB1 expression or decreased activation of AMPK or mTOR were observed in any of the salivary gland tumors tested. In contrast, we found that the salivary gland tumors exhibited an increased rather than a decreased AMPK activation. Although the PI3K/Akt pathway was found to be activated in most of the analyzed tumor samples, the unchanged robust activity of LKB1/AMPK likely prevents (over)activation of mTOR. CONCLUSION In contrast to many other types of cancer, inactivation or downregulation of the LKB1/AMPK pathway does not substantially contribute to the pathogenesis of salivary gland tumors.
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Affiliation(s)
- Natascha Cidlinsky
- Molecular and Cellular Anatomy, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | - Giada Dogliotti
- Molecular and Cellular Anatomy, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | - Tobias Pukrop
- Department of Internal Medicine III, Hematology and Medical Oncology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Rudolf Jung
- Institute for Pathology, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Florian Weber
- Institute for Pathology, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Michael P Krahn
- Molecular and Cellular Anatomy, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany.
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9
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Battista MJ, Goetze K, Schmidt M, Cotarelo C, Weyer-Elberich V, Hasenburg A, Mueller-Klieser W, Walenta S. Feasibility of induced metabolic bioluminescence imaging in advanced ovarian cancer patients: first results of a pilot study. J Cancer Res Clin Oncol 2016; 142:1909-16. [PMID: 27342420 DOI: 10.1007/s00432-016-2200-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/18/2016] [Indexed: 12/29/2022]
Abstract
PURPOSE The precise determination of energy metabolites is challenged by the heterogeneity of their distribution, their rapid changes after surgical resection and the architectural complexity of malignancies. Induced metabolic bioluminescence imaging (imBI) allows to determine energy metabolites in tissue sections and to co-localize these with histological structures based on consecutive sections stained with HE. In this prospective pilot study patients with suspected advanced ovarian cancer (OC) were enrolled to prove the feasibility of imBI. METHODS During surgery, suspicious peritoneal metastases were resected and transferred in liquid nitrogen within 30 s. ATP, glucose and lactate concentrations were measured. Furthermore, the expression of monocarboxylate transporters MCT1 and MCT4 was determined by immunofluorescence staining. RESULTS 16 patients were screened, 12 entered the study. Final histological assessment revealed ten malignant and two benign peritoneal lesions. In all 12 cases high concentrations of ATP suggested that energy metabolism was not altered by the surgical and transport procedures (mean 0.56 μmol/g, range 0.24-1.21 μmol/g). The mean concentration of glucose was 1.95 μmol/g (range 0.58-4.71 μmol/g). The concentration of lactate was drastically higher in the ten OC cases (mean 24.79 μmol/g, range 17.51-37.16 μmol/g) compared to the benign samples (mean 5.98 μmol/g, range 5.43-6.54 μmol/g). Lactate concentrations seem to correlate with MCT1 (spearman rank correlation ρ = 0.624, 0.05 > p > 0.025), but not with MCT4 (spearman rank correlation ρ = 0.018, p > 0.1). CONCLUSIONS ImBI is feasible in peritoneal metastases of OC and encourages further effort to elucidate the role of glucose, lactate, MCT1 and MCT4 in OC.
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Affiliation(s)
- Marco Johannes Battista
- Department of Gynecology and Obstetrics, University Medical Centre Mainz, Langenbeckstr. 1, 55131, Mainz, Germany.
| | - Kristina Goetze
- Institute for Pathophysiology, University Medical Centre Mainz, Mainz, Germany
| | - Marcus Schmidt
- Department of Gynecology and Obstetrics, University Medical Centre Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Cristina Cotarelo
- Institute of Pathology, University Medical Centre Mainz, Mainz, Germany
| | - Veronika Weyer-Elberich
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre Mainz, Mainz, Germany
| | - Annette Hasenburg
- Department of Gynecology and Obstetrics, University Medical Centre Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | | | - Stefan Walenta
- Institute for Pathophysiology, University Medical Centre Mainz, Mainz, Germany
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10
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Weighted gene co-expression network analysis reveals key genes involved in pancreatic ductal adenocarcinoma development. Cell Oncol (Dordr) 2016; 39:379-88. [PMID: 27240826 DOI: 10.1007/s13402-016-0283-7] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2016] [Indexed: 12/29/2022] Open
Abstract
PURPOSE Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive malignancy. Up till now, the patient's prognosis remains poor which, among others, is due to the paucity of reliable early diagnostic biomarkers. In the past, candidate diagnostic biomarkers and therapeutic targets have been delineated from genes that were found to be differentially expressed in normal versus tumour samples. Recently, new systems biology approaches have been developed to analyse gene expression data, which may yield new biomarkers. As of yet, the weighted gene co-expression network analysis (WGCNA) tool has not been applied to PDAC microarray-based gene expression data. METHODS PDAC microarray-based gene expression datasets, listed in the Gene Expression Omnibus (GEO) database, were analysed. After pre-processing of the data, we built two final datasets, Normal and PDAC, encompassing 104 and 129 patient samples, respectively. Next, we constructed a weighted gene co-expression network and identified modules of co-expressed genes distinguishing normal from disease conditions. Functional annotations of the genes in these modules were carried out to highlight PDAC-associated molecular pathways and common regulatory mechanisms. Finally, overall survival analyses were carried out to assess the suitability of the genes identified as prognostic biomarkers. RESULTS Using WGCNA, we identified several key genes that may play important roles in PDAC. These genes are mainly related to either endoplasmic reticulum, mitochondrion or membrane functions, exhibit transferase or hydrolase activities and are involved in biological processes such as lipid metabolism or transmembrane transport. As a validation of the applied method, we found that some of the identified key genes (CEACAM1, MCU, VDAC1, CYCS, C15ORF52, TMEM51, LARP1 and ERLIN2) have previously been reported by others as potential PDAC biomarkers. Using overall survival analyses, we found that several of the newly identified genes may serve as biomarkers to stratify PDAC patients into low- and high-risk groups. CONCLUSIONS Using this new systems biology approach, we identified several genes that appear to be critical to PDAC development. As such, they may represent potential diagnostic biomarkers as well as therapeutic targets with clinical utility.
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Flores-López LA, Martínez-Hernández MG, Viedma-Rodríguez R, Díaz-Flores M, Baiza-Gutman LA. High glucose and insulin enhance uPA expression, ROS formation and invasiveness in breast cancer-derived cells. Cell Oncol (Dordr) 2016; 39:365-78. [PMID: 27106722 DOI: 10.1007/s13402-016-0282-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2016] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Accumulating evidence indicates that type 2 diabetes is associated with an increased risk to develop breast cancer. This risk has been attributed to hyperglycemia, hyperinsulinemia and chronic inflammation. As yet, however, the mechanisms underlying this association are poorly understood. Here, we studied the effect of high glucose and insulin on breast cancer-derived cell proliferation, migration, epithelial-mesenchymal transition (EMT) and invasiveness, as well as its relationship to reactive oxygen species (ROS) production and the plasminogen activation system. METHODS MDA-MB-231 cell proliferation, migration and invasion were assessed using 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT), scratch-wound and matrigel transwell assays, respectively. ROS production was determined using 2' 7'-dichlorodihydrofluorescein diacetate. The expression of E-cadherin, vimentin, fibronectin, urokinase plasminogen activator (uPA), its receptor (uPAR) and its inhibitor (PAI-1) were assessed using qRT-PCR and/or Western blotting assays, respectively. uPA activity was determined using gel zymography. RESULTS We found that high glucose stimulated MDA-MB-231 cell proliferation, migration and invasion, together with an increased expression of mesenchymal markers (i.e., vimentin and fibronectin). These effects were further enhanced by the simultaneous administration of insulin. In both cases, the invasion and growth responses were found to be associated with an increased expression of uPA, uPAR and PAI-1, as well as an increase in active uPA. An osmolality effect of high glucose was excluded by using mannitol at an equimolar concentration. We also found that all changes induced by high glucose and insulin were attenuated by the anti-oxidant N-acetylcysteine (NAC) and, thus, depended on ROS production. CONCLUSIONS From our data we conclude that hyperglycemia and hyperinsulinemia can promote breast cancer cell proliferation, migration and invasion. We found that these features were associated with increased expression of the mesenchymal markers vimentin and fibronectin, as well as increased uPA expression and activation through a mechanism mediated by ROS.
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Affiliation(s)
- Luis Antonio Flores-López
- Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México, CP, 54090, México
| | - María Guadalupe Martínez-Hernández
- Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México, CP, 54090, México
| | - Rubí Viedma-Rodríguez
- Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México, CP, 54090, México
| | - Margarita Díaz-Flores
- Unidad de Investigación Médica en Bioquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Av. Cuauhtémoc 330, Col. Doctores, Del, Cuauhtémoc, DF, 06720, México
| | - Luis Arturo Baiza-Gutman
- Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios 1, Los Reyes Ixtacala, Tlalnepantla, Estado de México, CP, 54090, México.
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