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Rodriguez-Blanco J, Salvador AD, Suter RK, Swiderska-Syn M, Palomo-Caturla I, Kliebe V, Shahani P, Peterson K, Turos-Cabal M, Vieira ME, Wynn DT, Howell AJ, Yang F, Ban Y, McCrea HJ, Zindy F, Danis E, Vibhakar R, Jermakowicz A, Martin V, Coss CC, Harris BT, de Cubas A, Chen XS, Barnoud T, Roussel MF, Ayad NG, Robbins DJ. Triptolide and its prodrug Minnelide target high-risk MYC-amplified medulloblastoma in preclinical models. J Clin Invest 2024; 134:e171136. [PMID: 38885332 DOI: 10.1172/jci171136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/04/2024] [Indexed: 06/20/2024] Open
Abstract
Most children with medulloblastoma (MB) achieve remission, but some face very aggressive metastatic tumors. Their dismal outcome highlights the critical need to advance therapeutic approaches that benefit such high-risk patients. Minnelide, a clinically relevant analog of the natural product triptolide, has oncostatic activity in both preclinical and early clinical settings. Despite its efficacy and tolerable toxicity, this compound has not been evaluated in MB. Utilizing a bioinformatic data set that integrates cellular drug response data with gene expression, we predicted that Group 3 (G3) MB, which has a poor 5-year survival, would be sensitive to triptolide/Minnelide. We subsequently showed that both triptolide and Minnelide attenuate the viability of G3 MB cells ex vivo. Transcriptomic analyses identified MYC signaling, a pathologically relevant driver of G3 MB, as a downstream target of this class of drugs. We validated this MYC dependency in G3 MB cells and showed that triptolide exerts its efficacy by reducing both MYC transcription and MYC protein stability. Importantly, Minnelide acted on MYC to reduce tumor growth and leptomeningeal spread, which resulted in improved survival of G3 MB animal models. Moreover, Minnelide improved the efficacy of adjuvant chemotherapy, further highlighting its potential for the treatment of MYC-driven G3 MB.
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Affiliation(s)
- Jezabel Rodriguez-Blanco
- Darby Children's Research Institute, Department of Pediatrics, and
- Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina, USA
| | - April D Salvador
- Darby Children's Research Institute, Department of Pediatrics, and
| | - Robert K Suter
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington DC, USA
| | | | | | - Valentin Kliebe
- Darby Children's Research Institute, Department of Pediatrics, and
| | - Pritika Shahani
- Darby Children's Research Institute, Department of Pediatrics, and
| | - Kendell Peterson
- Darby Children's Research Institute, Department of Pediatrics, and
| | | | - Megan E Vieira
- Darby Children's Research Institute, Department of Pediatrics, and
| | - Daniel T Wynn
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington DC, USA
| | - Ashley J Howell
- Darby Children's Research Institute, Department of Pediatrics, and
| | - Fan Yang
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington DC, USA
| | - Yuguang Ban
- Department of Public Health Sciences, and
- Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Heather J McCrea
- Departments of Neurological Surgery and Pediatrics, University of Miami, Jackson Health System, Miller School of Medicine, Miami, Florida, USA
| | - Frederique Zindy
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Etienne Danis
- University of Colorado Cancer Center
- Department of Biomedical Informatics, and
| | - Rajeev Vibhakar
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Anna Jermakowicz
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington DC, USA
| | - Vanesa Martin
- Department of Morphology and Cell Biology, University of Oviedo, Oviedo, Asturias, Spain
| | | | - Brent T Harris
- Departments of Neurology and Pathology, Georgetown University Medical Center, Washington DC, USA
| | - Aguirre de Cubas
- Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina, USA
- Department of Microbiology and Immunology, and
| | - X Steven Chen
- Department of Public Health Sciences, and
- Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Thibaut Barnoud
- Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina, USA
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Martine F Roussel
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Nagi G Ayad
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington DC, USA
| | - David J Robbins
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington DC, USA
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2
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Li Z, Napolitano A, Fedele M, Gao X, Napolitano F. AI identifies potent inducers of breast cancer stem cell differentiation based on adversarial learning from gene expression data. Brief Bioinform 2024; 25:bbae207. [PMID: 38701411 PMCID: PMC11066897 DOI: 10.1093/bib/bbae207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/08/2024] [Accepted: 04/11/2024] [Indexed: 05/05/2024] Open
Abstract
Cancer stem cells (CSCs) are a subpopulation of cancer cells within tumors that exhibit stem-like properties and represent a potentially effective therapeutic target toward long-term remission by means of differentiation induction. By leveraging an artificial intelligence approach solely based on transcriptomics data, this study scored a large library of small molecules based on their predicted ability to induce differentiation in stem-like cells. In particular, a deep neural network model was trained using publicly available single-cell RNA-Seq data obtained from untreated human-induced pluripotent stem cells at various differentiation stages and subsequently utilized to screen drug-induced gene expression profiles from the Library of Integrated Network-based Cellular Signatures (LINCS) database. The challenge of adapting such different data domains was tackled by devising an adversarial learning approach that was able to effectively identify and remove domain-specific bias during the training phase. Experimental validation in MDA-MB-231 and MCF7 cells demonstrated the efficacy of five out of six tested molecules among those scored highest by the model. In particular, the efficacy of triptolide, OTS-167, quinacrine, granisetron and A-443654 offer a potential avenue for targeted therapies against breast CSCs.
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Affiliation(s)
- Zhongxiao Li
- Computer Science Program, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Antonella Napolitano
- Institute of Experimental Endocrinology and Oncology “G. Salvatore” (IEOS), National Research Council (CNR), Via De Amicis, 95 - 80131 Napoli, Italy
| | - Monica Fedele
- Institute of Experimental Endocrinology and Oncology “G. Salvatore” (IEOS), National Research Council (CNR), Via De Amicis, 95 - 80131 Napoli, Italy
| | - Xin Gao
- Computer Science Program, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Francesco Napolitano
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
- Department of Science and Technology, University of Sannio, Via dei Mulini 74, 82100 Benevento, Italy
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3
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Musleh Ud Din S, Streit SG, Huynh BT, Hana C, Abraham AN, Hussein A. Therapeutic Targeting of Hypoxia-Inducible Factors in Cancer. Int J Mol Sci 2024; 25:2060. [PMID: 38396737 PMCID: PMC10888675 DOI: 10.3390/ijms25042060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/07/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
In the realm of cancer therapeutics, targeting the hypoxia-inducible factor (HIF) pathway has emerged as a promising strategy. This study delves into the intricate web of HIF-associated mechanisms, exploring avenues for future anticancer therapies. Framing the investigation within the broader context of cancer progression and hypoxia response, this article aims to decipher the pivotal role played by HIF in regulating genes influencing angiogenesis, cell proliferation, and glucose metabolism. Employing diverse approaches such as HIF inhibitors, anti-angiogenic therapies, and hypoxia-activated prodrugs, the research methodologically intervenes at different nodes of the HIF pathway. Findings showcase the efficacy of agents like EZN-2968, Minnelide, and Acriflavine in modulating HIF-1α protein synthesis and destabilizing HIF-1, providing preliminary proof of HIF-1α mRNA modulation and antitumor activity. However, challenges, including toxicity, necessitate continued exploration and development, as exemplified by ongoing clinical trials. This article concludes by emphasizing the potential of targeted HIF therapies in disrupting cancer-related signaling pathways.
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Affiliation(s)
- Saba Musleh Ud Din
- Department of Internal Medicine, Memorial Healthcare System, 703 North Flamingo Road, Pembroke Pines, FL 33028, USA
| | - Spencer G. Streit
- Department of Hematology and Oncology, Memorial Healthcare System, 703 North Flamingo Road, Pembroke Pines, FL 33028, USA; (S.G.S.); (C.H.); (A.-N.A.); (A.H.)
| | - Bao Tran Huynh
- Department of Pharmacy, Memorial Healthcare System, 703 North Flamingo Road, Pembroke Pines, FL 33028, USA
| | - Caroline Hana
- Department of Hematology and Oncology, Memorial Healthcare System, 703 North Flamingo Road, Pembroke Pines, FL 33028, USA; (S.G.S.); (C.H.); (A.-N.A.); (A.H.)
| | - Anna-Ninny Abraham
- Department of Hematology and Oncology, Memorial Healthcare System, 703 North Flamingo Road, Pembroke Pines, FL 33028, USA; (S.G.S.); (C.H.); (A.-N.A.); (A.H.)
| | - Atif Hussein
- Department of Hematology and Oncology, Memorial Healthcare System, 703 North Flamingo Road, Pembroke Pines, FL 33028, USA; (S.G.S.); (C.H.); (A.-N.A.); (A.H.)
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4
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Kim LC, Lesner NP, Simon MC. Cancer Metabolism under Limiting Oxygen Conditions. Cold Spring Harb Perspect Med 2024; 14:a041542. [PMID: 37848248 PMCID: PMC10835619 DOI: 10.1101/cshperspect.a041542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
Molecular oxygen (O2) is essential for cellular bioenergetics and numerous biochemical reactions necessary for life. Solid tumors outgrow the native blood supply and diffusion limits of O2, and therefore must engage hypoxia response pathways that evolved to withstand acute periods of low O2 Hypoxia activates coordinated gene expression programs, primarily through hypoxia inducible factors (HIFs), to support survival. Many of these changes involve metabolic rewiring such as increasing glycolysis to support ATP generation while suppressing mitochondrial metabolism. Since low O2 is often coupled with nutrient stress in the tumor microenvironment, other responses to hypoxia include activation of nutrient uptake pathways, metabolite scavenging, and regulation of stress and growth signaling cascades. Continued development of models that better recapitulate tumors and their microenvironments will lead to greater understanding of oxygen-dependent metabolic reprogramming and lead to more effective cancer therapies.
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Affiliation(s)
- Laura C Kim
- Abramson Family Cancer Research Institute, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, USA
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Nicholas P Lesner
- Abramson Family Cancer Research Institute, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, USA
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - M Celeste Simon
- Abramson Family Cancer Research Institute, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, USA
- Department of Cell and Developmental Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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5
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Takagi T, Fujiwara-Tani R, Mori S, Kishi S, Nishiguchi Y, Sasaki T, Ogata R, Ikemoto A, Sasaki R, Ohmori H, Luo Y, Bhawal UK, Sho M, Kuniyasu H. Lauric Acid Overcomes Hypoxia-Induced Gemcitabine Chemoresistance in Pancreatic Ductal Adenocarcinoma. Int J Mol Sci 2023; 24:ijms24087506. [PMID: 37108667 PMCID: PMC10139117 DOI: 10.3390/ijms24087506] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/16/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
Although gemcitabine (GEM) is widely used in chemotherapy for pancreatic ductal adenocarcinoma (PDA), drug resistance restricts its clinical effectiveness. To examine the mechanism of GEM resistance, we established two GEM-resistant cell lines from human PDA cells by continuous treatment with GEM and CoCl2-induced chemical hypoxia. One resistant cell line possessed reduced energy production and decreased mitochondrial reactive oxygen species levels, while the other resistant cell line possessed increased stemness. In both cell lines, ethidium bromide-stained mitochondrial DNA levels decreased, suggesting mitochondrial DNA damage. Inhibition of hypoxia-inducible factor-1α in both cell lines did not restore the GEM sensitivity. In contrast, treatment of both cell types with lauric acid (LAA), a medium-chain fatty acid, restored GEM sensitivity. These results suggest that decreased energy production, decreased mitochondrial reactive oxygen species levels, and increased stemness associated with mitochondrial damage caused by GEM lead to GEM resistance, and that hypoxia may promote this process. Furthermore, forced activation of oxidative phosphorylation by LAA could be a tool to overcome GEM resistance. Clinical verification of the effectiveness of LAA in GEM resistance is necessary in the future.
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Grants
- 19K16564 Ministry of Education, Culture, Sports, Science and Technology
- 20K21659 Ministry of Education, Culture, Sports, Science and Technology
- 20K18007 Ministry of Education, Culture, Sports, Science and Technology
- 21K10143 Ministry of Education, Culture, Sports, Science and Technology
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Affiliation(s)
- Tadataka Takagi
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
- Department of Surgery, Nara Medical University, Kashihara 634-8522, Japan
| | - Rina Fujiwara-Tani
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Shiori Mori
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Shingo Kishi
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Yukiko Nishiguchi
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Takamitsu Sasaki
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Ruiko Ogata
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Ayaka Ikemoto
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Rika Sasaki
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Hitoshi Ohmori
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
| | - Yi Luo
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, 19 Qixiu Road, Nantong 226001, China
| | - Ujjal Kumar Bhawal
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Matsudo 271-8587, Japan
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai 600077, India
| | - Masayuki Sho
- Department of Surgery, Nara Medical University, Kashihara 634-8522, Japan
| | - Hiroki Kuniyasu
- Department of Molecular Pathology, Nara Medical University, Kashihara 634-8521, Japan
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6
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Ruze R, Song J, Yin X, Chen Y, Xu R, Wang C, Zhao Y. Mechanisms of obesity- and diabetes mellitus-related pancreatic carcinogenesis: a comprehensive and systematic review. Signal Transduct Target Ther 2023; 8:139. [PMID: 36964133 PMCID: PMC10039087 DOI: 10.1038/s41392-023-01376-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 01/31/2023] [Accepted: 02/15/2023] [Indexed: 03/26/2023] Open
Abstract
Research on obesity- and diabetes mellitus (DM)-related carcinogenesis has expanded exponentially since these two diseases were recognized as important risk factors for cancers. The growing interest in this area is prominently actuated by the increasing obesity and DM prevalence, which is partially responsible for the slight but constant increase in pancreatic cancer (PC) occurrence. PC is a highly lethal malignancy characterized by its insidious symptoms, delayed diagnosis, and devastating prognosis. The intricate process of obesity and DM promoting pancreatic carcinogenesis involves their local impact on the pancreas and concurrent whole-body systemic changes that are suitable for cancer initiation. The main mechanisms involved in this process include the excessive accumulation of various nutrients and metabolites promoting carcinogenesis directly while also aggravating mutagenic and carcinogenic metabolic disorders by affecting multiple pathways. Detrimental alterations in gastrointestinal and sex hormone levels and microbiome dysfunction further compromise immunometabolic regulation and contribute to the establishment of an immunosuppressive tumor microenvironment (TME) for carcinogenesis, which can be exacerbated by several crucial pathophysiological processes and TME components, such as autophagy, endoplasmic reticulum stress, oxidative stress, epithelial-mesenchymal transition, and exosome secretion. This review provides a comprehensive and critical analysis of the immunometabolic mechanisms of obesity- and DM-related pancreatic carcinogenesis and dissects how metabolic disorders impair anticancer immunity and influence pathophysiological processes to favor cancer initiation.
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Affiliation(s)
- Rexiati Ruze
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China
- Chinese Academy of Medical Sciences and Peking Union Medical College, No. 9 Dongdan Santiao, Beijing, China
| | - Jianlu Song
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China
- Chinese Academy of Medical Sciences and Peking Union Medical College, No. 9 Dongdan Santiao, Beijing, China
| | - Xinpeng Yin
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China
- Chinese Academy of Medical Sciences and Peking Union Medical College, No. 9 Dongdan Santiao, Beijing, China
| | - Yuan Chen
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China
- Chinese Academy of Medical Sciences and Peking Union Medical College, No. 9 Dongdan Santiao, Beijing, China
| | - Ruiyuan Xu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China
- Chinese Academy of Medical Sciences and Peking Union Medical College, No. 9 Dongdan Santiao, Beijing, China
| | - Chengcheng Wang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China.
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China.
| | - Yupei Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100730, Beijing, China.
- Key Laboratory of Research in Pancreatic Tumors, Chinese Academy of Medical Sciences, 100023, Beijing, China.
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7
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Pandey S, Gupta VK, Lavania SP. Role of epigenetics in pancreatic ductal adenocarcinoma. Epigenomics 2023; 15:89-110. [PMID: 36647796 DOI: 10.2217/epi-2022-0177] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive cancers, associated with poor survival outcomes. Lack of early diagnosis, resistance to conventional therapeutic treatments (including immunotherapy) and recurrence are some of the major hurdles in PDAC and contribute to its poor survival rate. While the risk of genetic predisposition to cancers is widely acknowledged and understood, recent advances in whole-genome and next-generation sequencing techniques have led to the acknowledgment of the role played by epigenetics, especially in PDAC. Epigenetic changes are heritable genetic modifications that influence gene expression without altering the DNA sequence. Epigenetic mechanisms (e.g., DNA methylation, post-translational modification of histone complexes and ncRNA) that result in reversible changes in gene expression are increasingly understood to be responsible for tumor initiation, development and even escape from immune surveillance. Our review seeks to highlight the various components of the epigenetic machinery that are known to be implicated in PDAC initiation and development and the feasibility of targeting these components to identify novel pharmacological strategies that could potentially lead to breakthroughs in PDAC treatment.
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Affiliation(s)
- Somnath Pandey
- Department of Surgery, University of Miami, Miller School of Medicine, Miami, FL 33136, USA
| | - Vineet K Gupta
- Department of Surgery, University of Miami, Miller School of Medicine, Miami, FL 33136, USA
| | - Shweta P Lavania
- Department of Surgery, University of Miami, Miller School of Medicine, Miami, FL 33136, USA
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8
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Wang D, Li Y, Ge H, Ghadban T, Reeh M, Güngör C. The Extracellular Matrix: A Key Accomplice of Cancer Stem Cell Migration, Metastasis Formation, and Drug Resistance in PDAC. Cancers (Basel) 2022; 14:cancers14163998. [PMID: 36010993 PMCID: PMC9406497 DOI: 10.3390/cancers14163998] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 12/23/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is rich in dense fibrotic stroma that are composed of extracellular matrix (ECM) proteins. A disruption of the balance between ECM synthesis and secretion and the altered expression of matrix remodeling enzymes lead to abnormal ECM dynamics in PDAC. This pathological ECM promotes cancer growth, survival, invasion, and alters the behavior of fibroblasts and immune cells leading to metastasis formation and chemotherapy resistance, which contribute to the high lethality of PDAC. Additionally, recent evidence highlights that ECM, as a major structural component of the tumor microenvironment, is a highly dynamic structure in which ECM proteins establish a physical and biochemical niche for cancer stem cells (CSCs). CSCs are characterized by self-renewal, tumor initiation, and resistance to chemotherapeutics. In this review, we will discuss the effects of the ECM on tumor biological behavior and its molecular impact on the fundamental signaling pathways in PDAC. We will also provide an overview of how the different ECM components are able to modulate CSCs properties and finally discuss the current and ongoing therapeutic strategies targeting the ECM. Given the many challenges facing current targeted therapies for PDAC, a better understanding of molecular events involving the interplay of ECM and CSC will be key in identifying more effective therapeutic strategies to eliminate CSCs and ultimately to improve survival in patients that are suffering from this deadly disease.
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9
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Kim I, Choi S, Yoo S, Lee M, Kim IS. Cancer-Associated Fibroblasts in the Hypoxic Tumor Microenvironment. Cancers (Basel) 2022; 14:cancers14143321. [PMID: 35884382 PMCID: PMC9320406 DOI: 10.3390/cancers14143321] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary Cancers have regions of low oxygen concentration where hypoxia-related signaling pathways are activated. The hypoxic tumor microenvironment has been widely accepted as a hallmark of cancer and shown to be a critical factor in the crosstalk between cancer and stromal cells. Fibroblasts are one of the most abundant cellular components in the tumor stroma and are also significantly affected by oxygen deprivation. In this case, we discuss the molecular and cellular mechanisms that regulate fibroblasts under hypoxic conditions and their effect on cancer development and progression. Unraveling these regulatory mechanisms could be exploited in developing potential fibroblast-specific therapeutics for cancer. Abstract Solid cancers are composed of malignant cells and their surrounding matrix components. Hypoxia plays a critical role in shaping the tumor microenvironment that contributes to cancer progression and treatment failure. Cancer-associated fibroblasts (CAFs) are one of the most prominent components of the tumor microenvironment. CAFs are highly sensitive to hypoxia and participates in the crosstalk with cancer cells. Hypoxic CAFs modulate several mechanisms that induce cancer malignancy, such as extracellular matrix (ECM) remodeling, immune evasion, metabolic reprogramming, angiogenesis, metastasis, and drug resistance. Key signaling molecules regulating CAFs in hypoxia include transforming growth factor (TGF-β) and hypoxia-inducible factors (HIFs). In this article, we summarize the mechanisms underlying the hypoxic regulation of CAFs and how hypoxic CAFs affect cancer development and progression. We also discuss the potential therapeutic strategies focused on targeting CAFs in the hypoxic tumor microenvironment.
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Affiliation(s)
- Iljin Kim
- Department of Pharmacology and Research Center for Controlling Intercellular Communication, Inha University College of Medicine, Incheon 22212, Korea; (S.C.); (S.Y.)
- Correspondence: (I.K.); (I.-S.K.)
| | - Sanga Choi
- Department of Pharmacology and Research Center for Controlling Intercellular Communication, Inha University College of Medicine, Incheon 22212, Korea; (S.C.); (S.Y.)
| | - Seongkyeong Yoo
- Department of Pharmacology and Research Center for Controlling Intercellular Communication, Inha University College of Medicine, Incheon 22212, Korea; (S.C.); (S.Y.)
| | - Mingyu Lee
- Division of Allergy and Clinical Immunology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - In-San Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
- Medicinal Materials Research Center, Biomedical Research Institute, Korea Institute Science and Technology, Seoul 02792, Korea
- Correspondence: (I.K.); (I.-S.K.)
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10
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Lam BQ, Srivastava R, Morvant J, Shankar S, Srivastava RK. Association of Diabetes Mellitus and Alcohol Abuse with Cancer: Molecular Mechanisms and Clinical Significance. Cells 2021; 10:cells10113077. [PMID: 34831299 PMCID: PMC8620339 DOI: 10.3390/cells10113077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/28/2021] [Accepted: 11/06/2021] [Indexed: 12/12/2022] Open
Abstract
Diabetes mellitus (DM), one of the metabolic diseases which is characterized by sustained hyperglycemia, is a life-threatening disease. The global prevalence of DM is on the rise, mainly in low- and middle-income countries. Diabetes is a major cause of blindness, heart attacks, kidney failure, stroke, and lower limb amputation. Type 2 diabetes mellitus (T2DM) is a form of diabetes that is characterized by high blood sugar and insulin resistance. T2DM can be prevented or delayed by a healthy diet, regular physical activity, maintaining normal body weight, and avoiding alcohol and tobacco use. Ethanol and its metabolites can cause differentiation defects in stem cells and promote inflammatory injury and carcinogenesis in several tissues. Recent studies have suggested that diabetes can be treated, and its consequences can be avoided or delayed with proper management. DM has a greater risk for several cancers, such as breast, colorectal, endometrial, pancreatic, gallbladder, renal, and liver cancer. The incidence of cancer is significantly higher in patients with DM than in those without DM. In addition to DM, alcohol abuse is also a risk factor for many cancers. We present a review of the recent studies investigating the association of both DM and alcohol abuse with cancer incidence.
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Affiliation(s)
- Bao Q. Lam
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA; (B.Q.L.); (S.S.)
| | - Rashmi Srivastava
- Department of Pharmacology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA;
| | - Jason Morvant
- Department of Surgery, Ochsner Health System, 120 Ochsner Boulevard, Gretna, LA 70056, USA;
- A.B. Freeman School of Business, Tulane University, New Orleans, LA 70118, USA
| | - Sharmila Shankar
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA; (B.Q.L.); (S.S.)
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- John W. Deming Department of Medicine, School of Medicine, Tulane University, New Orleans, LA 70112, USA
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70119, USA
| | - Rakesh K. Srivastava
- Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA; (B.Q.L.); (S.S.)
- A.B. Freeman School of Business, Tulane University, New Orleans, LA 70118, USA
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
- Correspondence:
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11
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Kato A, Ng S, Thangasamy A, Han H, Zhou W, Raeppel S, Fallon M, Guha S, Ammanamanchi S. A potential signaling axis between RON kinase receptor and hypoxia-inducible factor-1 alpha in pancreatic cancer. Mol Carcinog 2021; 60:734-745. [PMID: 34347914 PMCID: PMC9292374 DOI: 10.1002/mc.23339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 11/06/2022]
Abstract
The Cancer Genome Atlas (TCGA) of a pancreatic cancer cohort identified high MST1R (RON tyrosine kinase receptor) expression correlated with poor prognosis in human pancreatic cancer. RON expression is null/minimal in normal pancreas but elevates from pan-in lesions through invasive carcinomas. We report using multiple approaches RON directly regulates HIF-1α, a critical driver of genes involved in cancer cell invasion and metastasis. RON and HIF-1α are highly co-expressed in the 101 human PDAC tumors analyzed and RON expression correlated with HIF-1α expression in a subset of PDAC cell lines. knockdown of RON expression in RON positive cells blocked HIF-1α expression, whereas ectopic RON expression in RON null cells induced HIF-1α expression suggesting the direct regulation of HIF-1α by RON kinase receptor. RON regulates HIF-1α through an unreported transcriptional mechanism involving PI3 kinase-mediated AKT phosphorylation and Sp1-dependent HIF-1α promoter activity leading to increased HIF-1α mRNA expression. RON/HIF-1α modulation altered the invasive behavior of PDAC cells. A small-molecule RON kinase inhibitor decreased RON ligand, MSP-induced HIF-1α expression, and invasion of PDAC cells. Immunohistochemical analysis on RON knockdown orthotopic PDAC tumor xenograft confirmed that RON inhibition significantly blocked HIF-1α expression. RON/HIF-1α co-expression also exists in triple-negative breast cancer cells, a tumor type that also lacks molecular therapeutic targets. This is the first report describing RON/HIF-1α axis in any tumor type and is a potential novel therapeutic target.
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Affiliation(s)
- Akihisa Kato
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA.,Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Serina Ng
- Division of Molecular Medicine, TGen, Phoenix, Arizona, USA
| | - Amalraj Thangasamy
- Department of Medicine, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Haiyong Han
- Division of Molecular Medicine, TGen, Phoenix, Arizona, USA
| | - Wendi Zhou
- Department of Pathology, Banner University Medical Center, Phoenix, Arizona, USA
| | | | - Michael Fallon
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA
| | - Sushovan Guha
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA
| | - Sudhakar Ammanamanchi
- Department of Internal Medicine, University of Arizona College of Medicine-Phoenix, Phoenix, Arizona, USA
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12
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Gao J, Zhang Y, Liu X, Wu X, Huang L, Gao W. Triptolide: pharmacological spectrum, biosynthesis, chemical synthesis and derivatives. Theranostics 2021; 11:7199-7221. [PMID: 34158845 PMCID: PMC8210588 DOI: 10.7150/thno.57745] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 04/29/2021] [Indexed: 12/16/2022] Open
Abstract
Triptolide, an abietane-type diterpenoid isolated from Tripterygium wilfordii Hook. F., has significant pharmacological activity. Research results show that triptolide has obvious inhibitory effects on many solid tumors. Therefore, triptolide has become one of the lead compounds candidates for being the next "blockbuster" drug, and multiple triptolide derivatives have entered clinical research. An increasing number of researchers have developed triptolide synthesis methods to meet the clinical need. To provide new ideas for researchers in different disciplines and connect different disciplines with researchers aiming to solve scientific problems more efficiently, this article reviews the research progress made with analyzes of triptolide pharmacological activity, biosynthetic pathways, and chemical synthesis pathways and reported in toxicological and clinical studies of derivatives over the past 20 years, which have laid the foundation for subsequent researchers to study triptolide in many ways.
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Affiliation(s)
- Jie Gao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China
- Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, Chinese Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Yifeng Zhang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China
- Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Xihong Liu
- Basic Medical College, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Xiayi Wu
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China
| | - Luqi Huang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, Chinese Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Wei Gao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China
- Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
- Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, 100069, China
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13
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Gupta VK, Sharma NS, Durden B, Garrido VT, Kesh K, Edwards D, Wang D, Myer C, Mateo-Victoriano B, Kollala SS, Ban Y, Gao Z, Bhattacharya SK, Saluja A, Singh PK, Banerjee S. Hypoxia-Driven Oncometabolite L-2HG Maintains Stemness-Differentiation Balance and Facilitates Immune Evasion in Pancreatic Cancer. Cancer Res 2021; 81:4001-4013. [PMID: 33990397 DOI: 10.1158/0008-5472.can-20-2562] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/09/2020] [Accepted: 05/12/2021] [Indexed: 12/16/2022]
Abstract
In pancreatic cancer, the robust fibroinflammatory stroma contributes to immune suppression and renders tumors hypoxic, altering intratumoral metabolic pathways and leading to poor survival. One metabolic enzyme activated during hypoxia is lactate dehydrogenase A (LDHA). As a result of its promiscuous activity under hypoxia, LDHA produces L-2 hydroxyglutarate (L-2HG), an epigenetic modifier, that regulates the tumor transcriptome. However, the role of L-2HG in remodeling the pancreatic tumor microenvironment is not known. Here we used mass spectrometry to detect L-2HG in serum samples from patients with pancreatic cancer, comprising tumor cells as well as stromal cells. Both hypoxic pancreatic tumors as well as serum from patients with pancreatic cancer accumulated L-2HG as a result of promiscuous activity of LDHA. This abnormally accumulated L-2HG led to H3 hypermethylation and altered gene expression, which regulated a critical balance between stemness and differentiation in pancreatic tumors. Secreted L-2HG inhibited T-cell proliferation and migration, suppressing antitumor immunity. In a syngeneic orthotopic model of pancreatic cancer, inhibition of LDH with GSK2837808A decreased L-2HG, induced tumor regression, and sensitized tumors to anti-PD1 therapy. In conclusion, hypoxia-mediated promiscuous activity of LDH produces L-2HG in pancreatic tumor cells, regulating the stemness-differentiation balance and contributing to immune evasion. Targeting LDH can be developed as a potential therapy to sensitize pancreatic tumors to checkpoint inhibitor therapy. SIGNIFICANCE: This study shows that promiscuous LDH activity produces L-2HG in pancreatic tumor and stromal cells, modulating tumor stemness and immune cell function and infiltration in the tumor microenvironment.
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Affiliation(s)
- Vineet K Gupta
- Department of Surgery, University of Miami, Miami, Florida.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Nikita S Sharma
- Department of Surgery, University of Miami, Miami, Florida.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Brittany Durden
- Department of Surgery, University of Miami, Miami, Florida.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Vanessa T Garrido
- Department of Surgery, University of Miami, Miami, Florida.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Kousik Kesh
- Department of Surgery, University of Miami, Miami, Florida.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Dujon Edwards
- Department of Surgery, University of Miami, Miami, Florida
| | - Dezhen Wang
- University of Nebraska Medical School, Omaha, Nebraska
| | - Ciara Myer
- Department of Ophthalmology, University of Miami, Miami, Florida.,Miami Integrative Metabolomic Research Center, University of Miami, Miami, Florida
| | | | | | - Yuguang Ban
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Zhen Gao
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | - Sanjoy K Bhattacharya
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida.,Department of Ophthalmology, University of Miami, Miami, Florida.,Miami Integrative Metabolomic Research Center, University of Miami, Miami, Florida
| | - Ashok Saluja
- Department of Surgery, University of Miami, Miami, Florida.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida
| | | | - Sulagna Banerjee
- Department of Surgery, University of Miami, Miami, Florida. .,Sylvester Comprehensive Cancer Center, Miller School of Medicine, Miami, Florida.,Miami Integrative Metabolomic Research Center, University of Miami, Miami, Florida
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14
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Tao J, Yang G, Zhou W, Qiu J, Chen G, Luo W, Zhao F, You L, Zheng L, Zhang T, Zhao Y. Targeting hypoxic tumor microenvironment in pancreatic cancer. J Hematol Oncol 2021; 14:14. [PMID: 33436044 PMCID: PMC7805044 DOI: 10.1186/s13045-020-01030-w] [Citation(s) in RCA: 197] [Impact Index Per Article: 65.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/25/2020] [Indexed: 12/13/2022] Open
Abstract
Attributable to its late diagnosis, early metastasis, and poor prognosis, pancreatic cancer remains one of the most lethal diseases worldwide. Unlike other solid tumors, pancreatic cancer harbors ample stromal cells and abundant extracellular matrix but lacks vascularization, resulting in persistent and severe hypoxia within the tumor. Hypoxic microenvironment has extensive effects on biological behaviors or malignant phenotypes of pancreatic cancer, including metabolic reprogramming, cancer stemness, invasion and metastasis, and pathological angiogenesis, which synergistically contribute to development and therapeutic resistance of pancreatic cancer. Through various mechanisms including but not confined to maintenance of redox homeostasis, activation of autophagy, epigenetic regulation, and those induced by hypoxia-inducible factors, intratumoral hypoxia drives the above biological processes in pancreatic cancer. Recognizing the pivotal roles of hypoxia in pancreatic cancer progression and therapies, hypoxia-based antitumoral strategies have been continuously developed over the recent years, some of which have been applied in clinical trials to evaluate their efficacy and safety in combinatory therapies for patients with pancreatic cancer. In this review, we discuss the molecular mechanisms underlying hypoxia-induced aggressive and therapeutically resistant phenotypes in both pancreatic cancerous and stromal cells. Additionally, we focus more on innovative therapies targeting the tumor hypoxic microenvironment itself, which hold great potential to overcome the resistance to chemotherapy and radiotherapy and to enhance antitumor efficacy and reduce toxicity to normal tissues.
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Affiliation(s)
- Jinxin Tao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Gang Yang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Wenchuan Zhou
- Department of Ophthalmology, Xinhua Hospital Affiliated to Shanghai JiaoTong University School of Medicine, Shanghai, 200092, China
| | - Jiangdong Qiu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Guangyu Chen
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Wenhao Luo
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Fangyu Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Lei You
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Lianfang Zheng
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Taiping Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China. .,Clinical Immunology Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
| | - Yupei Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China.
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15
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Sheikh MA, Emerald BS, Ansari SA. Stem cell fate determination through protein O-GlcNAcylation. J Biol Chem 2021; 296:100035. [PMID: 33154167 PMCID: PMC7948975 DOI: 10.1074/jbc.rev120.014915] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 11/05/2020] [Accepted: 11/05/2020] [Indexed: 12/13/2022] Open
Abstract
Embryonic and adult stem cells possess the capability of self-renewal and lineage-specific differentiation. The intricate balance between self-renewal and differentiation is governed by developmental signals and cell-type-specific gene regulatory mechanisms. A perturbed intra/extracellular environment during lineage specification could affect stem cell fate decisions resulting in pathology. Growing evidence demonstrates that metabolic pathways govern epigenetic regulation of gene expression during stem cell fate commitment through the utilization of metabolic intermediates or end products of metabolic pathways as substrates for enzymatic histone/DNA modifications. UDP-GlcNAc is one such metabolite that acts as a substrate for enzymatic mono-glycosylation of various nuclear, cytosolic, and mitochondrial proteins on serine/threonine amino acid residues, a process termed protein O-GlcNAcylation. The levels of GlcNAc inside the cells depend on the nutrient availability, especially glucose. Thus, this metabolic sensor could modulate gene expression through O-GlcNAc modification of histones or other proteins in response to metabolic fluctuations. Herein, we review evidence demonstrating how stem cells couple metabolic inputs to gene regulatory pathways through O-GlcNAc-mediated epigenetic/transcriptional regulatory mechanisms to govern self-renewal and lineage-specific differentiation programs. This review will serve as a primer for researchers seeking to better understand how O-GlcNAc influences stemness and may catalyze the discovery of new stem-cell-based therapeutic approaches.
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Affiliation(s)
- Muhammad Abid Sheikh
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, UAE
| | - Bright Starling Emerald
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, UAE; Zayed Center for Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, UAE
| | - Suraiya Anjum Ansari
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, UAE; Zayed Center for Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, UAE.
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16
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Stoica AF, Chang CH, Pauklin S. Molecular Therapeutics of Pancreatic Ductal Adenocarcinoma: Targeted Pathways and the Role of Cancer Stem Cells. Trends Pharmacol Sci 2020; 41:977-993. [PMID: 33092892 DOI: 10.1016/j.tips.2020.09.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/01/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers in humans due to late detection and highly metastatic characteristics. PDAC cells vary in their tumorigenic capabilities with the presence of a subset of PDAC cells known as pancreatic cancer stem cells (CSCs), which are more resistant to currently used therapeutics. Here, we describe the role of CSCs and tumour stroma in developing therapeutic strategies for PDAC and suggest that developmental plasticity could be considered a hallmark of cancers. We provide an overview of the molecular targets in PDAC treatments, including targeted therapies of cellular processes such as proliferation, evasion of growth suppressors, activating metastasis, and metabolic effects. Since PDAC is an inflammation-driven cancer, we also revisit therapeutic strategies targeting inflammation and immunotherapy. Lastly, we suggest that targeting epigenetic mechanisms opens therapeutic routes for heterogeneous cancer cell populations, including CSCs.
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Affiliation(s)
- Andrei-Florian Stoica
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Old Road, University of Oxford, Oxford OX3 7LD, UK
| | - Chao-Hui Chang
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Old Road, University of Oxford, Oxford OX3 7LD, UK
| | - Siim Pauklin
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Old Road, University of Oxford, Oxford OX3 7LD, UK.
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17
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Zhang Q, Han Z, Zhu Y, Chen J, Li W. Role of hypoxia inducible factor-1 in cancer stem cells (Review). Mol Med Rep 2020; 23:17. [PMID: 33179080 PMCID: PMC7673349 DOI: 10.3892/mmr.2020.11655] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
Cancer stem cells (CSCs) have been found to play a decisive role in cancer recurrence, metastasis, and chemo‑, radio‑ and immuno‑resistance. Understanding the mechanism of CSC self‑renewal and proliferation may help overcome the limitations of clinical treatment. The microenvironment of tumor growth consists of a lack of oxygen, and hypoxia has been confirmed to induce cancer cell invasion, metastasis and epithelial‑mesenchymal transition, and is usually associated with poor prognosis and low survival rates. Hypoxia inducible factor‑1 (HIF‑1) can be stably expressed under hypoxia and act as an important molecule to regulate the development of CSCs, but the specific mechanism remains unclear. The present review attempted to explain the role of HIF‑1 in the generation and maintenance of CSCs from the perspective of epigenetics, metabolic reprogramming, tumor immunity, CSC markers, non‑coding RNA and signaling pathways associated with HIF‑1, in order to provide novel targets with HIF‑1 as the core for clinical treatment, and extend the life of patients.
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Affiliation(s)
- Qi Zhang
- Stem Cell and Cancer Center, The First Hospital of Jilin University, Changchun, Jilin 130061, P.R. China
| | - Zhenzhen Han
- Stem Cell and Cancer Center, The First Hospital of Jilin University, Changchun, Jilin 130061, P.R. China
| | - Yanbo Zhu
- Stem Cell and Cancer Center, The First Hospital of Jilin University, Changchun, Jilin 130061, P.R. China
| | - Jingcheng Chen
- Stem Cell and Cancer Center, The First Hospital of Jilin University, Changchun, Jilin 130061, P.R. China
| | - Wei Li
- Stem Cell and Cancer Center, The First Hospital of Jilin University, Changchun, Jilin 130061, P.R. China
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18
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Kesh K, Garrido VT, Dosch A, Durden B, Gupta VK, Sharma NS, Lyle M, Nagathihalli N, Merchant N, Saluja A, Banerjee S. Stroma secreted IL6 selects for "stem-like" population and alters pancreatic tumor microenvironment by reprogramming metabolic pathways. Cell Death Dis 2020; 11:967. [PMID: 33177492 PMCID: PMC7658205 DOI: 10.1038/s41419-020-03168-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 12/17/2022]
Abstract
Pancreatic adenocarcinoma is a devastating disease with an abysmal survival rate of 9%. A robust fibro-inflammatory and desmoplastic stroma, characteristic of pancreatic cancer, contribute to the challenges in developing viable therapeutic strategies in this disease. Apart from constricting blood vessels and preventing efficient drug delivery to the tumor, the stroma also contributes to the aggressive biology of cancer along with its immune-evasive microenvironment. In this study, we show that in pancreatic tumors, the developing stroma increases tumor initiation frequency in pancreatic cancer cells in vivo by enriching for CD133 + aggressive "stem-like" cells. Additionally, the stromal fibroblasts secrete IL6 as the major cytokine, increases glycolytic flux in the pancreatic tumor cells, and increases lactate efflux in the microenvironment via activation of the STAT signaling pathway. We also show that the secreted lactate favors activation of M2 macrophages in the tumor microenvironment, which excludes CD8 + T cells in the tumor. Our data additionally confirms that the treatment of pancreatic tumors with anti-IL6 antibody results in tumor regression as well as decreased CD133 + population within the tumor. Furthermore, inhibiting the lactate efflux in the microenvironment reduces M2 macrophages, and makes pancreatic tumors more responsive to anti-PD1 therapy. This suggests that stromal IL6 driven metabolic reprogramming plays a significant role in the development of an immune-evasive microenvironment. In conclusion, our study shows that targeting the metabolic pathways affected by stromal IL6 can make pancreatic tumors amenable to checkpoint inhibitor therapy.
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Affiliation(s)
- Kousik Kesh
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Vanessa T Garrido
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Austin Dosch
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Brittany Durden
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Vineet K Gupta
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Nikita S Sharma
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Michael Lyle
- WeliChem Biotech Inc, Vancouver, British Columbia, Canada
| | - Nagaraj Nagathihalli
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Nipun Merchant
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Ashok Saluja
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Sulagna Banerjee
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA. .,Sylvester Comprehensive Cancer Center, Miami, FL, USA.
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19
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Noel P, Hussein S, Ng S, Antal CE, Lin W, Rodela E, Delgado P, Naveed S, Downes M, Lin Y, Evans RM, Von Hoff DD, Han H. Triptolide targets super-enhancer networks in pancreatic cancer cells and cancer-associated fibroblasts. Oncogenesis 2020; 9:100. [PMID: 33168807 PMCID: PMC7653036 DOI: 10.1038/s41389-020-00285-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 10/14/2020] [Accepted: 10/21/2020] [Indexed: 02/06/2023] Open
Abstract
The tumor microenvironment in pancreatic ductal adenocarcinoma (PDAC) is highly heterogeneous, fibrotic, and hypovascular, marked by extensive desmoplasia and maintained by the tumor cells, cancer-associated fibroblasts (CAFs) and other stromal cells. There is an urgent need to identify and develop treatment strategies that not only target the tumor cells but can also modulate the stromal cells. A growing number of studies implicate the role of regulatory DNA elements called super-enhancers (SE) in maintaining cell-type-specific gene expression networks in both normal and cancer cells. Using chromatin activation marks, we first mapped SE networks in pancreatic CAFs and epithelial tumor cells and found them to have distinct SE profiles. Next, we explored the role of triptolide (TPL), a natural compound with antitumor activity, in the context of modulating cell-type-specific SE signatures in PDAC. We found that TPL, cytotoxic to both pancreatic tumor cells and CAFs, disrupted SEs in a manner that resulted in the downregulation of SE-associated genes (e.g., BRD4, MYC, RNA Pol II, and Collagen 1) in both cell types at mRNA and protein levels. Our observations suggest that TPL acts as a SE interactive agent and may elicit its antitumor activity through SE disruption to re-program cellular cross talk and signaling in PDAC. Based on our findings, epigenetic reprogramming of transcriptional regulation using SE modulating compounds such as TPL may provide means for effective treatment options for pancreatic cancer patients.
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Affiliation(s)
- Pawan Noel
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Shaimaa Hussein
- Baylor Scott and White Research Institute, Baylor Institute for Immunology Research, Dallas, TX, USA
| | - Serina Ng
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Corina E Antal
- Gene Expression Laboratory, Salk Institute for Biological Studies, San Diego, CA, USA
| | - Wei Lin
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Emily Rodela
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA.,Phoenix Children's Hospital, Phoenix, AZ, USA
| | - Priscilla Delgado
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Sanna Naveed
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Michael Downes
- Gene Expression Laboratory, Salk Institute for Biological Studies, San Diego, CA, USA
| | - Yin Lin
- Baylor Scott and White Research Institute, Baylor Institute for Immunology Research, Dallas, TX, USA
| | - Ronald M Evans
- Gene Expression Laboratory, Salk Institute for Biological Studies, San Diego, CA, USA.,Howard Hughes Medical Institute, Salk Institute for Biological Studies, San Diego, CA, USA
| | - Daniel D Von Hoff
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Haiyong Han
- Molecular Medicine Division, Translational Genomics Research Institute, Phoenix, AZ, USA.
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20
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Therapy Resistance, Cancer Stem Cells and ECM in Cancer: The Matrix Reloaded. Cancers (Basel) 2020; 12:cancers12103067. [PMID: 33096662 PMCID: PMC7589733 DOI: 10.3390/cancers12103067] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 12/12/2022] Open
Abstract
The extracellular matrix (ECM) has remained an enigmatic component of the tumor microenvironment. It drives metastasis via its interaction with the integrin signaling pathway, contributes to tumor progression and confers therapy resistance by providing a physical barrier around the tumor. The complexity of the ECM lies in its heterogeneous composition and complex glycosylation that can provide a support matrix as well as trigger oncogenic signaling pathways by interacting with the tumor cells. In this review, we attempt to dissect the role of the ECM in enriching for the treatment refractory cancer stem cell population and how it may be involved in regulating their metabolic needs. Additionally, we discuss how the ECM is instrumental in remodeling the tumor immune microenvironment and the potential ways to target this component in order to develop a viable therapy.
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21
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Sulaiman A, McGarry S, Chambers J, Al-Kadi E, Phan A, Li L, Mediratta K, Dimitroulakos J, Addison C, Li X, Wang L. Targeting Hypoxia Sensitizes TNBC to Cisplatin and Promotes Inhibition of Both Bulk and Cancer Stem Cells. Int J Mol Sci 2020; 21:ijms21165788. [PMID: 32806648 PMCID: PMC7461107 DOI: 10.3390/ijms21165788] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 01/16/2023] Open
Abstract
Development of targeted therapies for triple-negative breast cancer (TNBC) is an unmet medical need. Cisplatin has demonstrated its promising potential for the treatment of TNBC in clinical trials; however, cisplatin treatment is associated with hypoxia that, in turn, promotes cancer stem cell (CSC) enrichment and drug resistance. Therapeutic approaches to attenuate this may lead to increased cisplatin efficacy in the clinic for the treatment of TNBC. In this report we analyzed clinical datasets of TNBC and found that TNBC patients possessed higher levels of EGFR and hypoxia gene expression. A similar expression pattern was also observed in cisplatin-resistant ovarian cancer cells. We, thus, developed a new therapeutic approach to inhibit EGFR and hypoxia by combination treatment with metformin and gefitinib that sensitized TNBC cells to cisplatin and led to the inhibition of both CD44+/CD24− and ALDH+ CSCs. We demonstrated a similar inhibition efficacy on organotypic cultures of TNBC patient samples ex vivo. Since these drugs have already been used frequently in the clinic; this study illustrates a novel, clinically translatable therapeutic approach to treat patients with TNBC.
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Affiliation(s)
- Andrew Sulaiman
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Ottawa Institute of Systems Biology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada
- Department of Basic Science, Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO 64106, USA
| | - Sarah McGarry
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Ottawa Institute of Systems Biology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada
| | - Jason Chambers
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
| | - Emil Al-Kadi
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
| | - Alexandra Phan
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
| | - Li Li
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Ottawa Institute of Systems Biology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada
| | - Karan Mediratta
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
| | - Jim Dimitroulakos
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Centre for Cancer Therapeutics, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Christina Addison
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Centre for Cancer Therapeutics, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Xuguang Li
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Centre for Biologics Evaluation, Biologics and Genetic Therapies Directorate, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada
| | - Lisheng Wang
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada; (A.S.); (S.M.); (J.C.); (E.A.-K.); (A.P.); (L.L.); (K.M.); (J.D.); (C.A.); (X.L.)
- Ottawa Institute of Systems Biology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
- Correspondence: ; Tel.: +1-613-562-5624
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22
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Philips BJ, Kumar A, Burki S, Ryan JP, Noda K, D'Cunha J. Triptolide-induced apoptosis in non-small cell lung cancer via a novel miR204-5p/Caveolin-1/Akt-mediated pathway. Oncotarget 2020; 11:2793-2806. [PMID: 32733649 PMCID: PMC7367654 DOI: 10.18632/oncotarget.27672] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 04/14/2020] [Indexed: 12/12/2022] Open
Abstract
Lung cancer is one of the most prevalent malignancies world-wide with non-small cell lung cancer (NSCLC) comprising nearly 80% of all cases. Unfortunately, many lung cancer patients are diagnosed at advanced stages of the disease with an associated poor prognosis. Recently, the Chinese herb root extract Triptolide/Minnelide (TL) has shown significant promise as a therapeutic agent for NSCLC treatment both in vitro and in vivo. The aim of this study was to investigate the underlying mechanism(s) of action regarding TL-induced cytotoxicity in NSCLC. We demonstrate that triptolide treatment of A549 and H460 NSCLC cells decreases Caveolin-1 (CAV-1) mRNA/protein expression, resulting in activation of the Akt/Bcl-2-mediated mitochondrial apoptosis pathway. CAV-1 down-regulation was triggered by Micro-RNA 204-5p (miR204-5p) up-regulation and could be significantly blocked by pre-treatment with both Sirt-1/Sirt-3 specific siRNA and SIRT-1/SIRT-3 enzyme inhibitors, EX-527 and nicotinamide. Overall, our results provide evidence for a novel mechanism by which TL exerts its cytotoxic effects on NSCLC via CAV-1 down-regulation. Furthermore, these findings demonstrate a pivotal role for TL induction of the Akt/Bax pathway in apoptosis of human lung cancer.
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Affiliation(s)
- Brian J Philips
- Division of Lung Transplantation and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ajay Kumar
- Division of Lung Transplantation and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sarah Burki
- Division of Lung Transplantation and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - John P Ryan
- Division of Lung Transplantation and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kentaro Noda
- Division of Lung Transplantation and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jonathan D'Cunha
- Department of Cardiothoracic Surgery, Mayo Clinic, Phoenix, AZ, USA
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23
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Stopa KB, Kusiak AA, Szopa MD, Ferdek PE, Jakubowska MA. Pancreatic Cancer and Its Microenvironment-Recent Advances and Current Controversies. Int J Mol Sci 2020; 21:E3218. [PMID: 32370075 PMCID: PMC7246785 DOI: 10.3390/ijms21093218] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 02/06/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) causes annually well over 400,000 deaths world-wide and remains one of the major unresolved health problems. This exocrine pancreatic cancer originates from the mutated epithelial cells: acinar and ductal cells. However, the epithelia-derived cancer component forms only a relatively small fraction of the tumor mass. The majority of the tumor consists of acellular fibrous stroma and diverse populations of the non-neoplastic cancer-associated cells. Importantly, the tumor microenvironment is maintained by dynamic cell-cell and cell-matrix interactions. In this article, we aim to review the most common drivers of PDAC. Then we summarize the current knowledge on PDAC microenvironment, particularly in relation to pancreatic cancer therapy. The focus is placed on the acellular stroma as well as cell populations that inhabit the matrix. We also describe the altered metabolism of PDAC and characterize cellular signaling in this cancer.
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Affiliation(s)
- Kinga B. Stopa
- Malopolska Centre of Biotechnology, Jagiellonian University, ul. Gronostajowa 7A, 30-387 Krakow, Poland;
| | - Agnieszka A. Kusiak
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland; (A.A.K.); (M.D.S.)
| | - Mateusz D. Szopa
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland; (A.A.K.); (M.D.S.)
| | - Pawel E. Ferdek
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland; (A.A.K.); (M.D.S.)
| | - Monika A. Jakubowska
- Malopolska Centre of Biotechnology, Jagiellonian University, ul. Gronostajowa 7A, 30-387 Krakow, Poland;
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24
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Burki S, Noda K, Philips BJ, Velayutham M, Shiva S, Sanchez PG, Kumar A, D'Cunha J. Impact of triptolide during ex vivo lung perfusion on grafts after transplantation in a rat model. J Thorac Cardiovasc Surg 2020; 161:S0022-5223(20)30191-4. [PMID: 32169373 DOI: 10.1016/j.jtcvs.2019.12.104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/30/2019] [Accepted: 12/19/2019] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Ex vivo lung perfusion creates a proinflammatory environment leading to deterioration in graft quality that may contribute to post-transplant graft dysfunction. Triptolide has been shown to have a therapeutic potential in various disease states because of its anti-inflammatory properties. On this basis, we investigated the impact of triptolide on graft preservation during ex vivo lung perfusion and associated post-transplant outcomes in a rat transplant model. METHODS We performed rat normothermic ex vivo lung perfusion with acellular Steen solution containing 100 nM triptolide for 4 hours and compared the data with untreated lungs. Orthotopic single lung transplantation after ex vivo lung perfusion was performed. RESULTS Physiologic and functional parameters of lung grafts on ex vivo lung perfusion with triptolide were better than those without treatment. Graft glucose consumption was significantly attenuated on ex vivo lung perfusion with triptolide via inhibition of hypoxia signaling resulting in improved mitochondrial function and reduced oxidative stress. Also, intragraft inflammation was markedly lower in triptolide-treated lungs because of inhibition of nuclear factor-κB signaling. Furthermore, post-transplant graft function and inflammatory events were significantly improved in the triptolide group compared with the untreated group. CONCLUSIONS Treatment of lung grafts with triptolide during ex vivo lung perfusion may serve to enhance graft preservation and improve graft protection resulting in better post-transplant outcomes.
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Affiliation(s)
- Sarah Burki
- Division of Lung Transplant and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Kentaro Noda
- Division of Lung Transplant and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Brian J Philips
- Division of Lung Transplant and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Murugesan Velayutham
- Department of Medicine, Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, Pa; Department of Surgery, Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, Pa
| | - Sruti Shiva
- Department of Medicine, Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, Pa
| | - Pablo G Sanchez
- Division of Lung Transplant and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Ajay Kumar
- Division of Lung Transplant and Lung Failure, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Jonathan D'Cunha
- Department of Cardiothoracic Surgery, Mayo Clinic Arizona, Pheonix, Ariz.
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25
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Sharma NS, Gnamlin P, Durden B, Gupta VK, Kesh K, Garrido VT, Dudeja V, Saluja A, Banerjee S. Long non-coding RNA GAS5 acts as proliferation "brakes" in CD133+ cells responsible for tumor recurrence. Oncogenesis 2019; 8:68. [PMID: 31740660 PMCID: PMC6861230 DOI: 10.1038/s41389-019-0177-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 10/23/2019] [Accepted: 10/28/2019] [Indexed: 12/11/2022] Open
Abstract
Presence of quiescent, therapy evasive population often described as cancer stem cells (CSC) or tumor initiating cells (TIC) is often attributed to extreme metastasis and tumor recurrence. This population is typically enriched in a tumor as a result of microenvironment or chemotherapy induced stress. The TIC population adapts to this stress by turning on cell cycle arrest programs that is a “fail-safe” mechanism to prevent expansion of malignant cells to prevent further injury. Upon removal of the “stress” conditions, these cells restart their cell cycle and regain their proliferative nature thereby resulting in tumor relapse. Growth Arrest Specific 5 (GAS5) is a long-non-coding RNA that plays a vital role in this process. In pancreatic cancer, CD133+ population is a typical representation of the TIC population that is responsible for tumor relapse. In this study, we show for the first time that emergence of CD133+ population coincides with upregulation of GAS5, that reprograms the cell cycle to slow proliferation by inhibiting GR mediated cell cycle control. The CD133+ population further routed metabolites like glucose to shunt pathways like pentose phosphate pathway, that were predominantly biosynthetic in spite of being quiescent in nature but did not use it immediately for nucleic acid synthesis. Upon inhibiting GAS5, these cells were released from their growth arrest and restarted the nucleic acid synthesis and proliferation. Our study thus showed that GAS5 acts as a molecular switch for regulating quiescence and growth arrest in CD133+ population, that is responsible for aggressive biology of pancreatic tumors.
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Affiliation(s)
- Nikita S Sharma
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA
| | - Prisca Gnamlin
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA
| | - Brittany Durden
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA
| | - Vineet K Gupta
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA
| | - Kousik Kesh
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA
| | - Vanessa T Garrido
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA
| | - Vikas Dudeja
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, USA
| | - Ashok Saluja
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, USA
| | - Sulagna Banerjee
- Department of Surgery, Miller school of Medicine, University of Miami, Miami, FL, USA. .,Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, USA.
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26
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Daniel SK, Sullivan KM, Labadie KP, Pillarisetty VG. Hypoxia as a barrier to immunotherapy in pancreatic adenocarcinoma. Clin Transl Med 2019; 8:10. [PMID: 30931508 PMCID: PMC6441665 DOI: 10.1186/s40169-019-0226-9] [Citation(s) in RCA: 142] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 03/09/2019] [Indexed: 12/11/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDA) is a lethal disease with limited response to cytotoxic chemoradiotherapy, as well as newer immunotherapies. The PDA tumor microenvironment contains infiltrating immune cells including cytotoxic T cells; however, there is an overall immunosuppressive milieu. Hypoxia is a known element of the solid tumor microenvironment and may promote tumor survival. Through various mechanisms including, but not limited to, those mediated by HIF-1α, hypoxia also leads to increased tumor proliferation and metabolic changes. Furthermore, epithelial to mesenchymal transition is promoted through several pathways, including NOTCH and c-MET, regulated by hypoxia. Hypoxia-promoted changes also contribute to the immunosuppressive phenotype seen in many different cell types within the microenvironment and thereby may inhibit an effective immune system response to PDA. Pancreatic stellate cells (PSCs) and myofibroblasts appear to contribute to the recruitment of myeloid derived suppressor cells (MDSCs) and B cells in PDA via cytokines increased due to hypoxia. PSCs also increase collagen secretion in response to HIF-1α, which promotes a fibrotic stroma that alters T cell homing and migration. In hypoxic environments, B cells contribute to cytotoxic T cell exhaustion and produce chemokines to attract more immunosuppressive regulatory T cells. MDSCs inhibit T cell metabolism by hoarding key amino acids, modulate T cell homing by cleaving L-selectin, and prevent T cell activation by increasing PD-L1 expression. Immunosuppressive M2 phenotype macrophages promote T cell anergy via increased nitric oxide (NO) and decreased arginine in hypoxia. Increased numbers of regulatory T cells are seen in hypoxia which prevent effector T cell activation through cytokine production and increased CTLA-4. Effective immunotherapy for pancreatic adenocarcinoma and other solid tumors will need to help counteract the immunosuppressive nature of hypoxia-induced changes in the tumor microenvironment. Promising studies will look at combination therapies involving checkpoint inhibitors, chemokine inhibitors, and possible targeting of hypoxia. While no model is perfect, assuring that models incorporate the effects of hypoxia on cancer cells, stromal cells, and effector immune cells will be crucial in developing successful therapies.
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Affiliation(s)
- S K Daniel
- Department of Surgery, University of Washington, Seattle, USA
| | - K M Sullivan
- Department of Surgery, University of Washington, Seattle, USA
| | - K P Labadie
- Department of Surgery, University of Washington, Seattle, USA
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27
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Chen J, Xu R, Xia J, Huang J, Su B, Wang S. Aspirin inhibits hypoxia-mediated lung cancer cell stemness and exosome function. Pathol Res Pract 2019; 215:152379. [PMID: 30878308 DOI: 10.1016/j.prp.2019.03.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/12/2019] [Accepted: 03/02/2019] [Indexed: 01/26/2023]
Abstract
BACKGROUND Epidemiological studies have illustrated that regular aspirin consumption may decrease the risk of non-small cell lung cancer (NSCLC). The present study aims to investigate the mechanism of aspirin-induced inhibition of NSCLC development during hypoxia. METHODS A549 cells were pre-treated with the vehicle control or aspirin and then subjected to hypoxic culture. Cell viability was monitored by CCK-8 assay, and flow cytometry was performed to detect cell cycle distributions, apoptosis, and proportion of cancer stem cells (CSCs). Flow cytometric cell sorting was used to separate CSCs. Quantitative reverse transcription-polymerase chain reaction and Western blot were used to detect the mRNA and protein levels of stem cell markers and the related signaling molecules. The abundance of prostaglandin E2 was detected by enzyme-linked immunosorbent assay. Exosomes in the cell culture medium were isolated using ExoQuick, and the number of exosomes was quantified by the EXOCET exosome quantification assay kit. Cell migration and angiogenesis were monitored by transwell migration assay and in vitro angiogenesis experiments. RESULTS Aspirin inhibited cell proliferation and induced G2/M cell cycle arrest in hypoxic A549 cells; it also inhibited hypoxia-enhanced stemness in both A549 and ALDH+ cells. The drug reduced hypoxia-enhanced numbers of exosomes in A549 cells and exerted negative effects on the hypoxia-mediated up-regulation of exosomal HIF-1α/COX-2 and expression of exosomal miR-135b and miR-210. While hypoxic-induced exosomes can promote the proliferation, migration, and angiogenesis of other A549 cells, aspirin can weaken this promotion by reducing the amount of exosome secreted and changing exosome contents. CONCLUSIONS Aspirin inhibits the hypoxia-induced stemness, hypoxic-mediated exosome release, and malignant paracrine effects of A549 cells.
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Affiliation(s)
- Jinghua Chen
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, 510282, China; Department of Medical Oncology, Second Clinical Medicine College of Jinan University, Shenzhen People's Hospital, Shenzhen 518020, China
| | - Ruilian Xu
- Department of Medical Oncology, Second Clinical Medicine College of Jinan University, Shenzhen People's Hospital, Shenzhen 518020, China
| | - Junxian Xia
- Department of Medical Oncology, Second Clinical Medicine College of Jinan University, Shenzhen People's Hospital, Shenzhen 518020, China
| | - Jiacheng Huang
- Department of Medical Oncology, Second Clinical Medicine College of Jinan University, Shenzhen People's Hospital, Shenzhen 518020, China
| | - Binbin Su
- Department of Gastroenterology, South Building, Chinese PLA General Hospital, Beijing 100853, China
| | - Senming Wang
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, 510282, China.
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28
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Wang F, Zheng Z, Guan J, Qi D, Zhou S, Shen X, Wang F, Wenkert D, Kirmani B, Solouki T, Fonkem E, Wong ET, Huang JH, Wu E. Identification of a panel of genes as a prognostic biomarker for glioblastoma. EBioMedicine 2018; 37:68-77. [PMID: 30341039 PMCID: PMC6284420 DOI: 10.1016/j.ebiom.2018.10.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 12/31/2022] Open
Abstract
Background Glioblastoma multiforme (GBM) is a fatal disease without effective therapy. Identification of new biomarkers for prognosis would enable more rational selections of strategies to cure patients with GBM and prevent disease relapse. Methods Seven datasets derived from GBM patients using microarray or next generation sequencing in R2 online database (http://r2.amc.nl) were extracted and then analyzed using JMP software. The survival distribution was calculated according to the Kaplan-Meier method and the significance was determined using log-rank statistics. The sensitivity of a panel of GBM cell lines in response to temozolomide (TMZ), salinomycin, celastrol, and triptolide treatments was evaluated using MTS and tumor-sphere formation assay. Findings We identified that CD44, ATP binding cassette subfamily C member 3 (ABCC3), and tumor necrosis factor receptor subfamily member 1A (TNFRSF1A) as highly expressed genes in GBMs are associated with patients' poor outcomes and therapy resistance. Furthermore, these three markers combined with MGMT, a conventional GBM marker, can classify GBM patients into five new subtypes with different overall survival time in response to treatment. The four-gene signature and the therapy response of GBMs to a panel of therapeutic compounds were confirmed in a panel of GBM cell lines. Interpretation The data indicate that the four-gene panel can be used as a therapy response index for GBM patients and potential therapeutic targets. These results provide important new insights into the early diagnosis and the prognosis for GBM patients and introduce potential targets for GBM therapeutics. Fund Baylor Scott & White Health Startup Fund (E.W.); Collaborative Faculty Research Investment Program (CFRIP) of Baylor University, Baylor Scott & White Health, and Baylor College of Medicine (E.W., T.S., J.H.H.); NIH R01 NS067435 (J.H.H.); Scott & White Plummer Foundation Grant (J.H.H.); National Natural Science Foundation of China 816280007 (J.H.H. and Fu.W.).
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Affiliation(s)
- Fengfei Wang
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Neurology, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Surgery, Texas A & M Health Science Center, College of Medicine, Temple, TX 76508, USA.
| | - Zheng Zheng
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Psychology, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Jitian Guan
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA
| | - Dan Qi
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA
| | - Shuang Zhou
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA
| | - Xin Shen
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Anesthesiology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an 710061, China
| | - Fushun Wang
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Psychology, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China; Department of Neurosurgery, University of Rochester Medical Center, Rochester, NY 14643, USA
| | - David Wenkert
- Department of Medicine, Division of Endocrinology, Baylor Scott & White Health, Temple, TX 76508, USA; Department of Medicine, Texas A & M Health Science Center, College of Medicine, Temple, TX 76508, USA
| | - Batool Kirmani
- Department of Neurology, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Neurology, Texas A & M Health Science Center, College of Medicine, Temple, TX 76508, USA
| | - Touradj Solouki
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76706, USA
| | - Ekokobe Fonkem
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Neurology, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Surgery, Texas A & M Health Science Center, College of Medicine, Temple, TX 76508, USA; LIVESTRONG Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
| | - Eric T Wong
- Brain Tumor Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Jason H Huang
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Surgery, Texas A & M Health Science Center, College of Medicine, Temple, TX 76508, USA.
| | - Erxi Wu
- Department of Neurosurgery, Baylor Scott & White Health, Temple, TX 76502, USA; Neuroscience Institute, Baylor Scott & White Health, Temple, TX 76502, USA; Department of Surgery, Texas A & M Health Science Center, College of Medicine, Temple, TX 76508, USA; LIVESTRONG Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA; Department of Pharmaceutical Sciences, Texas A & M Health Science Center, College of Pharmacy, College Station, TX 77843, USA.
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Broad targeting of triptolide to resistance and sensitization for cancer therapy. Biomed Pharmacother 2018; 104:771-780. [DOI: 10.1016/j.biopha.2018.05.088] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/06/2018] [Accepted: 05/18/2018] [Indexed: 12/29/2022] Open
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"Nutrient-sensing" and self-renewal: O-GlcNAc in a new role. J Bioenerg Biomembr 2017; 50:205-211. [PMID: 29204729 DOI: 10.1007/s10863-017-9735-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 11/21/2017] [Indexed: 12/14/2022]
Abstract
Whether embryonic, hematopoietic or cancer stem cells, this metabolic reprogramming is dependent on the nutrient-status and bioenergetic pathways that is influenced by the micro-environmental niches like hypoxia. Thus, the microenvironment plays a vital role in determining the stem cell fate by inducing metabolic reprogramming. Under the influence of the microenvironment, like hypoxia, the stem cells have increased glucose and glutamine uptake which result in activation of hexosamine biosynthesis pathway (HBP) and increased O-GlcNAc Transferase (OGT). The current review is focused on understanding how HBP, a nutrient-sensing pathway (that leads to increased OGT activity) is instrumental in regulating self-renewal not only in embryonic and hematopoietic stem cells (ESC/HSC) but also in cancer stem cells.
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