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Zhang X, Ma H, Gao Y, Liang Y, Du Y, Hao S, Ni T. The Tumor Microenvironment: Signal Transduction. Biomolecules 2024; 14:438. [PMID: 38672455 PMCID: PMC11048169 DOI: 10.3390/biom14040438] [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: 03/06/2024] [Revised: 04/01/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
In the challenging tumor microenvironment (TME), tumors coexist with diverse stromal cell types. During tumor progression and metastasis, a reciprocal interaction occurs between cancer cells and their environment. These interactions involve ongoing and evolving paracrine and proximal signaling. Intrinsic signal transduction in tumors drives processes such as malignant transformation, epithelial-mesenchymal transition, immune evasion, and tumor cell metastasis. In addition, cancer cells embedded in the tumor microenvironment undergo metabolic reprogramming. Their metabolites, serving as signaling molecules, engage in metabolic communication with diverse matrix components. These metabolites act as direct regulators of carcinogenic pathways, thereby activating signaling cascades that contribute to cancer progression. Hence, gaining insights into the intrinsic signal transduction of tumors and the signaling communication between tumor cells and various matrix components within the tumor microenvironment may reveal novel therapeutic targets. In this review, we initially examine the development of the tumor microenvironment. Subsequently, we delineate the oncogenic signaling pathways within tumor cells and elucidate the reciprocal communication between these pathways and the tumor microenvironment. Finally, we give an overview of the effect of signal transduction within the tumor microenvironment on tumor metabolism and tumor immunity.
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Affiliation(s)
- Xianhong Zhang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (Y.G.); (Y.L.); (Y.D.)
| | - Haijun Ma
- Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, School of Life Sciences, Ningxia University, Yinchuan 750021, China;
| | - Yue Gao
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (Y.G.); (Y.L.); (Y.D.)
| | - Yabing Liang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (Y.G.); (Y.L.); (Y.D.)
| | - Yitian Du
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (Y.G.); (Y.L.); (Y.D.)
| | - Shuailin Hao
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (Y.G.); (Y.L.); (Y.D.)
| | - Ting Ni
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Institutes of Biomedical Sciences, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China; (X.Z.); (Y.G.); (Y.L.); (Y.D.)
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Wang R, Yang JF, Senay TE, Liu W, You J. Characterization of the Impact of Merkel Cell Polyomavirus-Induced Interferon Signaling on Viral Infection. J Virol 2023; 97:e0190722. [PMID: 36946735 PMCID: PMC10134799 DOI: 10.1128/jvi.01907-22] [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: 12/09/2022] [Accepted: 03/05/2023] [Indexed: 03/23/2023] Open
Abstract
Merkel cell polyomavirus (MCPyV) has been associated with approximately 80% of Merkel cell carcinoma (MCC), an aggressive and increasingly incident skin cancer. The link between host innate immunity, viral load control, and carcinogenesis has been established but poorly characterized. We previously established the importance of the STING and NF-κB pathways in the host innate immune response to viral infection. In this study, we further discovered that MCPyV infection of human dermal fibroblasts (HDFs) induces the expression of type I and III interferons (IFNs), which in turn stimulate robust expression of IFN-stimulated genes (ISGs). Blocking type I IFN downstream signaling using an IFN-β antibody, JAK inhibitors, and CRISPR knockout of the receptor dramatically repressed MCPyV infection-induced ISG expression but did not significantly restore viral replication activities. These findings suggest that IFN-mediated induction of ISGs in response to MCPyV infection is not crucial to viral control. Instead, we found that type I IFN exerts a more direct effect on MCPyV infection postentry by repressing early viral transcription. We further demonstrated that growth factors normally upregulated in wounded or UV-irradiated human skin can significantly stimulate MCPyV gene expression and replication. Together, these data suggest that in healthy individuals, host antiviral responses, such as IFN production induced by viral activity, may restrict viral propagation to reduce MCPyV burden. Meanwhile, growth factors induced by skin abrasion or UV irradiation may stimulate infected dermal fibroblasts to promote MCPyV propagation. A delicate balance of these mutually antagonizing factors provides a mechanism to support persistent MCPyV infection. IMPORTANCE Merkel cell carcinoma is an aggressive skin cancer that is particularly lethal to immunocompromised individuals. Though rare, MCC incidence has increased significantly in recent years. There are no lasting and effective treatments for metastatic disease, highlighting the need for additional treatment and prevention strategies. By investigating how the host innate immune system interfaces with Merkel cell polyomavirus, the etiological agent of most of these cancers, our studies identified key factors necessary for viral control, as well as conditions that support viral propagation. These studies provide new insights for understanding how the virus balances the effects of the host immune defenses and of growth factor stimulation to achieve persistent infection. Since virus-positive MCC requires the expression of viral oncogenes to survive, our observation that type I IFN can repress viral oncogene transcription indicates that these cytokines could be explored as a viable therapeutic option for treating patients with virus-positive MCC.
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Affiliation(s)
- Ranran Wang
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - June F. Yang
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Taylor E. Senay
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Wei Liu
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jianxin You
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Kniotek M, Roszczyk A, Zych M, Wrzosek M, Szafarowska M, Zagożdżon R, Jerzak M. Sildenafil Citrate Downregulates PDE5A mRNA Expression in Women with Recurrent Pregnancy Loss without Altering Angiogenic Factors-A Preliminary Study. J Clin Med 2021; 10:jcm10215086. [PMID: 34768607 PMCID: PMC8584603 DOI: 10.3390/jcm10215086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/15/2021] [Accepted: 10/25/2021] [Indexed: 11/16/2022] Open
Abstract
In our previous study, we showed that sildenafil citrate (SC), a selective PDE5A blocker, modulated NK cell activity in patients with recurrent pregnancy loss, which correlated with positive pregnancy outcomes. It was found that NK cells had a pivotal role in decidualization, angiogenesis, spiral artery remodeling, and the regulation of trophoblast invasion. Thus, in the current study, we determined the effects of SC on angiogenic factor expression and production, as well as idNK cell activity in the presence of nitric synthase blocker L-NMMA. Methods: NK cells (CD56+) were isolated from the peripheral blood of 15 patients and 15 fertile women on MACS columns and cultured in transformation media containing IL-15, TGF-β, and AZA—a methylation agent—for 7 days in hypoxia (94% N2, 1% O2, 5% CO2). Cultures were set up in four variants: (1) with SC, (2) without SC, (3) with NO, a synthase blocker, and (4) with SC and NO synthase blocker. NK cell activity was determined after 7 days of culturing as CD107a expression after an additional 4h of stimulation with K562 erythroleukemia cells. The expression of the PDE5A, VEGF-A, PIGF, IL-8, and RENBP genes was determined with quantitative real-time PCR (qRT-PCR) using TaqMan probes and ELISA was used to measure the concentrations of VEGF-A, PLGF, IL-8, Ang-I, Ang-II, IFN–γ proteins in culture supernatants after SC supplementation. Results: SC downregulated PDE5A expression and had no effect on other studied angiogenic factors. VEGF-A expression was increased in RPL patients compared with fertile women. Similarly, VEGF production was enhanced in RPL patients’ supernatants and SC increased the concentration of PIGF in culture supernatants. SC did not affect the expression or concentration of other studied factors, nor idNK cell activity, regardless of NO synthase blockade.
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Affiliation(s)
- Monika Kniotek
- Department of Clinical Immunology, Medical University of Warsaw, 59 Nowogrodzka St., 02-006 Warsaw, Poland; (M.K.); (A.R.); (M.Z.); (R.Z.)
| | - Aleksander Roszczyk
- Department of Clinical Immunology, Medical University of Warsaw, 59 Nowogrodzka St., 02-006 Warsaw, Poland; (M.K.); (A.R.); (M.Z.); (R.Z.)
| | - Michał Zych
- Department of Clinical Immunology, Medical University of Warsaw, 59 Nowogrodzka St., 02-006 Warsaw, Poland; (M.K.); (A.R.); (M.Z.); (R.Z.)
| | - Małgorzata Wrzosek
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha St., 02-097 Warsaw, Poland;
- Laboratory of Biochemistry and Clinical Chemistry, Preclinical Research Center, Medical University of Warsaw, 1 Banacha St., 02-097 Warsaw, Poland
- Correspondence:
| | - Monika Szafarowska
- Department of Gynecology and Oncological Gynecology, Military Institute of Medicine, 128 Szaserów St., 04-141 Warsaw, Poland;
| | - Radosław Zagożdżon
- Department of Clinical Immunology, Medical University of Warsaw, 59 Nowogrodzka St., 02-006 Warsaw, Poland; (M.K.); (A.R.); (M.Z.); (R.Z.)
- Department of Immunology, Transplantology and Internal Diseases, Medical University of Warsaw, 59 Nowogrodzka St., 02-006 Warsaw, Poland
| | - Małgorzata Jerzak
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha St., 02-097 Warsaw, Poland;
- Laboratory of Biochemistry and Clinical Chemistry, Preclinical Research Center, Medical University of Warsaw, 1 Banacha St., 02-097 Warsaw, Poland
- m-CLINIC 77/U9 Pulawska St., 02-595 Warsawa, Poland
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Pereira PMR, Edwards KJ, Mandleywala K, Carter LM, Escorcia FE, Campesato LF, Cornejo M, Abma L, Mohsen AA, Iacobuzio-Donahue CA, Merghoub T, Lewis JS. iNOS Regulates the Therapeutic Response of Pancreatic Cancer Cells to Radiotherapy. Cancer Res 2020; 80:1681-1692. [PMID: 32086240 PMCID: PMC7165066 DOI: 10.1158/0008-5472.can-19-2991] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/30/2019] [Accepted: 02/17/2020] [Indexed: 02/06/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is highly resistant to radiotherapy, chemotherapy, or a combination of these modalities, and surgery remains the only curative intervention for localized disease. Although cancer-associated fibroblasts (CAF) are abundant in PDAC tumors, the effects of radiotherapy on CAFs and the response of PDAC cells to radiotherapy are unknown. Using patient samples and orthotopic PDAC biological models, we showed that radiotherapy increased inducible nitric oxide synthase (iNOS) in the tumor tissues. Mechanistic in vitro studies showed that, although undetectable in radiotherapy-activated tumor cells, iNOS expression and nitric oxide (NO) secretion were significantly increased in CAFs secretome following radiotherapy. Culture of PDAC cells with conditioned media from radiotherapy-activated CAFs increased iNOS/NO signaling in tumor cells through NF-κB, which, in turn, elevated the release of inflammatory cytokines by the tumor cells. Increased NO after radiotherapy in PDAC contributed to an acidic microenvironment that was detectable using the radiolabeled pH (low) insertion peptide (pHLIP). In murine orthotopic PDAC models, pancreatic tumor growth was delayed when iNOS inhibition was combined with radiotherapy. These data show the important role that iNOS/NO signaling plays in the effectiveness of radiotherapy to treat PDAC tumors. SIGNIFICANCE: A radiolabeled pH-targeted peptide can be used as a PET imaging tool to assess therapy response within PDAC and blocking iNOS/NO signaling may improve radiotherapy outcomes.
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Affiliation(s)
- Patricia M R Pereira
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Kimberly J Edwards
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Komal Mandleywala
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Lukas M Carter
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Freddy E Escorcia
- Molecular Imaging Program, Center for Cancer Research, NCI, NIH, Bethesda, Maryland
| | - Luis Felipe Campesato
- Swim Across America and Ludwig Collaborative Laboratory, Immunology Program, Parker Institute for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Mike Cornejo
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Lolkje Abma
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Abu-Akeel Mohsen
- Swim Across America and Ludwig Collaborative Laboratory, Immunology Program, Parker Institute for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Christine A Iacobuzio-Donahue
- The David M. Rubenstein Center for Pancreatic Cancer Research, Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Taha Merghoub
- Swim Across America and Ludwig Collaborative Laboratory, Immunology Program, Parker Institute for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Medicine, Weill Cornell Medical College, New York, New York
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York.
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Pharmacology, Weill Cornell Medical College, New York, New York
- Department of Radiology, Weill Cornell Medical College, New York, New York
- Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York
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5
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Singha AK, Sarkar C, Majumder D, Debnath R, Saha M, Maiti D. IL-15 and GM-CSF stimulated macrophages enhances phagocytic activity in ENU induced leukemic mice. Immunobiology 2019; 225:151894. [PMID: 31839395 DOI: 10.1016/j.imbio.2019.12.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 11/20/2019] [Accepted: 12/03/2019] [Indexed: 12/17/2022]
Abstract
Murine splenic macrophage plays a decisive role in host immunity through phagocytosis against pathogens. It was reported that, macrophages also involves in phagocytosis of some tumour cells upon its activation initiated by certain cytokines produced by other immune cell or by indigenously treated. In this study, we have investigated the killing of leukemic blast cells by macrophages upon stimulated with IL-15 and GM-CSF alone or in combination in ENU challenged leukemic murine model. Along with, the release of TNF-α, IL-12 and IFN-γ by macrophages were assayed by ELISA. NO production by macrophages was also investigated. The molecular expressions like GM-CSF and TLRs were investigated for better understand of macrophage-leukemic cell interaction. Result shows that in disease condition macrophages have poor phagocytic activities which may be due to less release of TNF-α, IL-12 and IFN-γ by macrophages. This impaired phagocytic activity in leukemic mice was increase upon stimulation with IL-15 and GM-CSF.
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Affiliation(s)
- Ashish Kumar Singha
- Immunology and Microbiology Lab, Dept. of Human Physiology, Tripura University, Suryamaninagar-799022, Tripura, India.
| | - Chaitali Sarkar
- Immunology and Microbiology Lab, Dept. of Human Physiology, Tripura University, Suryamaninagar-799022, Tripura, India.
| | - Debabrata Majumder
- Immunology and Microbiology Lab, Dept. of Human Physiology, Tripura University, Suryamaninagar-799022, Tripura, India.
| | - Rahul Debnath
- Immunology and Microbiology Lab, Dept. of Human Physiology, Tripura University, Suryamaninagar-799022, Tripura, India.
| | - Manasi Saha
- Dept. of Pathology, Agartala Govt. Medical College, Agartala-799001, Tripura, India.
| | - Debasish Maiti
- Immunology and Microbiology Lab, Dept. of Human Physiology, Tripura University, Suryamaninagar-799022, Tripura, India.
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Basudhar D, Bharadwaj G, Somasundaram V, Cheng RYS, Ridnour LA, Fujita M, Lockett SJ, Anderson SK, McVicar DW, Wink DA. Understanding the tumour micro-environment communication network from an NOS2/COX2 perspective. Br J Pharmacol 2019; 176:155-176. [PMID: 30152521 PMCID: PMC6295414 DOI: 10.1111/bph.14488] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/31/2018] [Accepted: 08/06/2018] [Indexed: 12/12/2022] Open
Abstract
Recent findings suggest that co-expression of NOS2 and COX2 is a strong prognostic indicator in triple-negative breast cancer patients. These two key inflammation-associated enzymes are responsible for the biosynthesis of NO and PGE2 , respectively, and can exert their effect in both an autocrine and paracrine manner. Impairment of their physiological regulation leads to critical changes in both intra-tumoural and intercellular communication with the immune system and their adaptation to the hypoxic tumour micro-environment. Recent studies have also established a key role of NOS2-COX2 in causing metabolic shift. This review provides an extensive overview of the role of NO and PGE2 in shaping communication between the tumour micro-environment composed of tumour and immune cells that in turn favours tumour progression and metastasis. LINKED ARTICLES: This article is part of a themed section on Nitric Oxide 20 Years from the 1998 Nobel Prize. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.2/issuetoc.
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Affiliation(s)
- Debashree Basudhar
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Gaurav Bharadwaj
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Veena Somasundaram
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Robert Y S Cheng
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Lisa A Ridnour
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Mayumi Fujita
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
- Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological SciencesNational Institutes for Quantum and Radiological Science and TechnologyChiba‐kenJapan
| | - Stephen J Lockett
- Optical Microscopy and Analysis Laboratory, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research Inc. for the National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Stephen K Anderson
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - Daniel W McVicar
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
| | - David A Wink
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthFrederickMDUSA
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iNOS promotes CD24 +CD133 + liver cancer stem cell phenotype through a TACE/ADAM17-dependent Notch signaling pathway. Proc Natl Acad Sci U S A 2018; 115:E10127-E10136. [PMID: 30297396 PMCID: PMC6205478 DOI: 10.1073/pnas.1722100115] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
CD24+CD133+ liver cancer stem cells (LCSCs) express higher levels of the inducible nitric oxide synthase (iNOS) and possess self-renewal and tumor growth properties. iNOS is associated with more aggressive hepatocellular carcinoma (HCC), leading to the upregulation of Notch1 signaling. The activation of Notch1 by iNOS/NO is dependent on cGMP/PKG-mediated activation of TACE and upregulation of iRhom-2. The expression of iNOS, CD24, and CD133 correlates with the expression of activated TACE and Notch signaling in more aggressive human HCC. These findings have implications for understanding how LCSCs are regulated in the setting of chronic inflammation, where signals to upregulate iNOS are often present. Targeting iNOS could have therapeutic benefit in HCC. The inducible nitric oxide synthase (iNOS) is associated with more aggressive solid tumors, including hepatocellular carcinoma (HCC). Notch signaling in cancer stem cells promotes cancer progression and requires Notch cleavage by ADAM (a disintegrin and metalloprotease) proteases. We hypothesized that iNOS/NO promotes Notch1 activation through TACE/ADAM17 activation in liver cancer stem cells (LCSCs), leading to a more aggressive cancer phenotype. Expression of the stem cell markers CD24 and CD133 in the tumors of patients with HCC was associated with greater iNOS expression and worse outcomes. The expression of iNOS in CD24+CD133+ LCSCs, but not CD24−CD133− LCSCs, promoted Notch1 signaling and stemness characteristics in vitro and in vivo, as well as accelerating HCC initiation and tumor formation in the mouse xenograft tumor model. iNOS/NO led to Notch1 signaling through a pathway involving the soluble guanylyl cyclase/cGMP/PKG-dependent activation of TACE/ADAM17 and up-regulation of iRhom2 in LCSCs. In patients with HCC, higher TACE/ADAM17 expression and Notch1 activation correlated with poor prognosis. These findings link iNOS to Notch1 signaling in CD24+CD133+ LCSCs through the activation of TACE/ADAM17 and identify a mechanism for how iNOS contributes to progression of CD24+CD133+ HCC.
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Tran AN, Walker K, Harrison DG, Chen W, Mobley J, Hocevar L, Hackney JR, Sedaka RS, Pollock JS, Goldberg MS, Hambardzumyan D, Cooper SJ, Gillespie Y, Hjelmeland AB. Reactive species balance via GTP cyclohydrolase I regulates glioblastoma growth and tumor initiating cell maintenance. Neuro Oncol 2018; 20:1055-1067. [PMID: 29409010 PMCID: PMC6280150 DOI: 10.1093/neuonc/noy012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background Depending on the level, differentiation state, and tumor stage, reactive nitrogen and oxygen species inhibit or increase cancer growth and tumor initiating cell maintenance. The rate-limiting enzyme in a pathway that can regulate reactive species production but has not been thoroughly investigated in glioblastoma (GBM; grade IV astrocytoma) is guanosine triphosphate (GTP) cyclohydrolase 1 (GCH1). We sought to define the role of GCH1 in the regulation of GBM growth and brain tumor initiating cell (BTIC) maintenance. Methods We examined GCH1 mRNA and protein expression in patient-derived xenografts, clinical samples, and glioma gene expression datasets. GCH1 levels were modulated using lentiviral expression systems, and effects on cell growth, self-renewal, reactive species production, and survival in orthotopic patient-derived xenograft models were determined. Results GCH1 was expressed in GBMs with elevated but not exclusive RNA and protein levels in BTICs in comparison to non-BTICs. Overexpression of GCH1 in GBM cells increased cell growth in vitro and decreased survival in an intracranial GBM mouse model. In converse experiments, GCH1 knockdown with short hairpin RNA led to GBM cell growth inhibition and reduced self-renewal in association with decreased CD44 expression. GCH1 was critical for controlling reactive species balance, including suppressing reactive oxygen species production, which mediated GCH1 cell growth effects. In silico analyses demonstrated that higher GCH1 levels in glioma patients correlate with higher glioma grade, recurrence, and worse survival. Conclusions GCH1 expression in established GBMs is pro-tumorigenic, causing increased growth due, in part, to promotion of BTIC maintenance and suppression of reactive oxygen species.
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Affiliation(s)
- Anh Nhat Tran
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Kiera Walker
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - David G Harrison
- Division of Clinical Pharmacology, Vanderbilt University, Nashville, Tennessee
| | - Wei Chen
- Division of Clinical Pharmacology, Vanderbilt University, Nashville, Tennessee
| | - James Mobley
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Lauren Hocevar
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - James R Hackney
- Division of Neuropathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Randee S Sedaka
- Division of Nephrology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jennifer S Pollock
- Division of Nephrology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Matthew S Goldberg
- Department of Neurology, University of Alabama at Birmingham, Birmingham, Alabama
| | | | - Sara J Cooper
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama
| | - Yancey Gillespie
- Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Anita B Hjelmeland
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
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Singha AK, Bhattacharjee B, Saha B, Maiti D. IL-3 and GM-CSF modulate functions of splenic macrophages in ENU induced leukemia. Cytokine 2017; 91:89-95. [DOI: 10.1016/j.cyto.2016.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 12/06/2016] [Accepted: 12/09/2016] [Indexed: 12/11/2022]
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10
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Wallace ME, Alcantara MB, Minoda Y, Kannourakis G, Berzins SP. An emerging role for immune regulatory subsets in chronic lymphocytic leukaemia. Int Immunopharmacol 2015; 28:897-900. [PMID: 25862133 DOI: 10.1016/j.intimp.2015.03.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 03/28/2015] [Indexed: 01/22/2023]
Abstract
The last few years has seen the burgeoning of a new category of therapeutics for cancer targeting immune regulatory pathways. Antibodies that block the PD-1/PD-L1 interaction are perhaps the most prominent of these new anti-cancer therapies, but several other inhibitory receptor ligand interactions have also shown promise as targets in clinical trials, including CTLA-4/CD80 and Lag-3/MHC class II. Related to this is a rapidly improving knowledge of 'regulatory' lymphocyte lineages, including NKT cells, MAIT cells, B regulatory cells and others. These cells have potent cytokine responses that can influence the functioning of other immune cells and many researchers believe that they could be effective targets for therapies designed to enhance immune responses to cancer. This review will outline our current understanding of FOXP3+ 'Tregs', NKT cells, MAIT cells and B regulatory cells immune regulatory cell populations in cancer, with a particular focus on chronic lymphocytic leukaemia (CLL). We will discuss evidence linking CLL with immune regulatory dysfunction and the potential for new therapies targeting regulatory cells.
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Affiliation(s)
- Morgan E Wallace
- Federation University, Ballarat, Victoria, Australia; Fiona Elsey Cancer Research Institute, Ballarat, Victoria, Australia
| | - Marice B Alcantara
- Federation University, Ballarat, Victoria, Australia; Fiona Elsey Cancer Research Institute, Ballarat, Victoria, Australia
| | - Yosuke Minoda
- Federation University, Ballarat, Victoria, Australia; Fiona Elsey Cancer Research Institute, Ballarat, Victoria, Australia
| | - George Kannourakis
- Federation University, Ballarat, Victoria, Australia; Fiona Elsey Cancer Research Institute, Ballarat, Victoria, Australia
| | - Stuart P Berzins
- Federation University, Ballarat, Victoria, Australia; Fiona Elsey Cancer Research Institute, Ballarat, Victoria, Australia; Department of Microbiology and Immunology, University of Melbourne, Parkville, Victoria, Australia.
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11
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Zhu H, Vishwamitra D, Curry CV, Manshouri R, Diao L, Khan A, Amin HM. NPM-ALK up-regulates iNOS expression through a STAT3/microRNA-26a-dependent mechanism. J Pathol 2013; 230:82-94. [PMID: 23338972 DOI: 10.1002/path.4171] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 12/28/2012] [Accepted: 01/11/2013] [Indexed: 12/30/2022]
Abstract
NPM-ALK chimeric oncogene is aberrantly expressed in an aggressive subset of T-cell lymphomas that frequently occurs in children and young adults. The mechanisms underlying the oncogenic effects of NPM-ALK are not completely elucidated. Inducible nitric oxide synthase (iNOS) promotes the survival and maintains the malignant phenotype of cancer cells by generating NO, a highly active free radical. We tested the hypothesis that iNOS is deregulated in NPM-ALK(+) T-cell lymphoma and promotes the survival of this lymphoma. In line with this possibility, an iNOS inhibitor and NO scavenger decreased the viability, adhesion, and migration of NPM-ALK(+) T-cell lymphoma cells, and an NO donor reversed these effects. Moreover, the NO donor salvaged the viability of lymphoma cells treated with ALK inhibitors. In further support of an important role of iNOS, we found iNOS protein to be highly expressed in NPM-ALK(+) T-cell lymphoma cell lines and in 79% of primary tumours but not in human T lymphocytes. Although expression of iNOS mRNA was identified in NPM-ALK(+) T-cell lymphoma cell lines and tumours, iNOS mRNA was remarkably elevated in T lymphocytes, suggesting post-transcriptional regulation. Consistently, we found that miR-26a contains potential binding sites and interacts with the 3'-UTR of iNOS. In addition, miR-26a was significantly decreased in NPM-ALK(+) T-cell lymphoma cell lines and tumours compared with T lymphocytes and reactive lymph nodes. Restoration of miR-26a in lymphoma cells abrogated iNOS protein expression and decreased NO production and cell viability, adhesion, and migration. Importantly, the effects of miR-26a were substantially attenuated when the NO donor was simultaneously used to treat lymphoma cells. Our investigation of the mechanisms underlying the decrease in miR-26a in this lymphoma revealed novel evidence that STAT3, a major downstream substrate of NPM-ALK tyrosine kinase activity, suppresses MIR26A1 gene expression.
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Affiliation(s)
- Haifeng Zhu
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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12
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Kiaii S, Kokhaei P, Mozaffari F, Rossmann E, Pak F, Moshfegh A, Palma M, Hansson L, Mashayekhi K, Hojjat-Farsangi M, Österborg A, Choudhury A, Mellstedt H. T cells from indolent CLL patients prevent apoptosis of leukemic B cells in vitro and have altered gene expression profile. Cancer Immunol Immunother 2013; 62:51-63. [PMID: 22736254 PMCID: PMC11029037 DOI: 10.1007/s00262-012-1300-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 05/30/2012] [Indexed: 10/28/2022]
Abstract
T cells may have a role in sustaining the leukemic clone in chronic lymphocytic leukemia (CLL). In this study, we have examined the ability of T cells from CLL patients to support the survival of the leukemic B cells in vitro. Additionally, we compared global gene expression of T cells from indolent CLL patients with healthy individuals and multiple myeloma (MM) patients. Apoptosis of purified leukemic B cells was inhibited in vitro when co-cultured with increasing numbers of autologous T cells (p < 0.01) but not autologous B and T cells of normal donors. The anti-apoptotic effect exceeded that of the anti-apoptotic cytokine IL-4 (p = 0.002) and was greater with CD8+ cells (p = 0.02) than with CD4+ cells (p = 0.05). The effect was depended mainly on cell-cell contact although a significant effect was also observed in transwell experiments (p = 0.05). About 356 genes involved in different cellular pathways were deregulated in T cells of CLL patients compared to healthy individuals and MM patients. The results of gene expression profiling were verified for 6 genes (CCL4, CCL5 (RANTES), XCL1, XCL2, KLF6, and TRAF1) using qRT-PCR and immunoblotting. Our results demonstrate that CLL-derived T cells can prevent apoptosis of leukemic B cells and have altered expression of genes that may facilitate the survival of the leukemic clone.
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MESH Headings
- Aged
- Aged, 80 and over
- Apoptosis/immunology
- B-Lymphocytes/immunology
- Coculture Techniques
- Female
- Flow Cytometry
- Humans
- Immunoblotting
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Male
- Middle Aged
- Real-Time Polymerase Chain Reaction
- Reverse Transcriptase Polymerase Chain Reaction
- T-Lymphocytes/immunology
- Transcriptome
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Affiliation(s)
- Shahryar Kiaii
- Institute of Cancer, Barts and The London School of Medicine and Dentistry, Charterhouse Square, London, EC1M 6BQ UK
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Parviz Kokhaei
- Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Fariba Mozaffari
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Eva Rossmann
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska University Hospital, Solna, Karolinska Institutet, 171 76 Stockholm, Sweden
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - Fatemeh Pak
- Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Ali Moshfegh
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Marzia Palma
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska University Hospital, Solna, Karolinska Institutet, 171 76 Stockholm, Sweden
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - Lotta Hansson
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska University Hospital, Solna, Karolinska Institutet, 171 76 Stockholm, Sweden
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - Kaveh Mashayekhi
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - Mohammad Hojjat-Farsangi
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Anders Österborg
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska University Hospital, Solna, Karolinska Institutet, 171 76 Stockholm, Sweden
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - Aniruddha Choudhury
- Center for Immune and Targeted Therapy Greenslopes Private Hospital, Newdegate Street, Brisbane, QLD 4072 Australia
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska Institutet, 171 76 Stockholm, Sweden
| | - Håkan Mellstedt
- Cancer Center Karolinska, Department of Oncology-Pathology (Radiumhemmet), Karolinska University Hospital, Solna, Karolinska Institutet, 171 76 Stockholm, Sweden
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13
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Eyler CE, Wu Q, Yan K, MacSwords JM, Chandler-Militello D, Misuraca KL, Lathia JD, Forrester MT, Lee J, Stamler JS, Goldman SA, Bredel M, McLendon RE, Sloan AE, Hjelmeland AB, Rich JN. Glioma stem cell proliferation and tumor growth are promoted by nitric oxide synthase-2. Cell 2011; 146:53-66. [PMID: 21729780 DOI: 10.1016/j.cell.2011.06.006] [Citation(s) in RCA: 244] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 03/04/2011] [Accepted: 06/03/2011] [Indexed: 12/20/2022]
Abstract
Malignant gliomas are aggressive brain tumors with limited therapeutic options, and improvements in treatment require a deeper molecular understanding of this disease. As in other cancers, recent studies have identified highly tumorigenic subpopulations within malignant gliomas, known generally as cancer stem cells. Here, we demonstrate that glioma stem cells (GSCs) produce nitric oxide via elevated nitric oxide synthase-2 (NOS2) expression. GSCs depend on NOS2 activity for growth and tumorigenicity, distinguishing them from non-GSCs and normal neural progenitors. Gene expression profiling identified many NOS2-regulated genes, including the cell-cycle inhibitor cell division autoantigen-1 (CDA1). Further, high NOS2 expression correlates with decreased survival in human glioma patients, and NOS2 inhibition slows glioma growth in a murine intracranial model. These data provide insight into how GSCs are mechanistically distinct from their less tumorigenic counterparts and suggest that NOS2 inhibition may be an efficacious approach to treating this devastating disease.
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Affiliation(s)
- Christine E Eyler
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
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14
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SET oncoprotein overexpression in B-cell chronic lymphocytic leukemia and non-Hodgkin lymphoma: a predictor of aggressive disease and a new treatment target. Blood 2011; 118:4150-8. [PMID: 21844565 DOI: 10.1182/blood-2011-04-351072] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
B-cell chronic lymphocytic leukemia (CLL), an incurable leukemia, is characterized by defective apoptosis. We found that the SET oncoprotein, a potent inhibitor of the protein phosphatase 2A (PP2A) tumor suppressor, is overexpressed in primary CLL cells and B-cell non-Hodgkin lymphoma (NHL) cell line cells. In CLL, increased levels of SET correlated significantly with disease severity (shorter time to treatment and overall survival). We developed SET antagonist peptides that bound SET, increased cellular PP2A activity, decreased Mcl-1 expression, and displayed selective cytotoxicity for CLL and NHL cells in vitro. In addition, shRNA for SET was cytotoxic for NHL cells in vitro. The SET antagonist peptide COG449 inhibited growth of NHL tumor xenografts in mice. These data demonstrate that SET is a new treatment target in B-cell malignancies and that SET antagonists represent novel agents for treatment of CLL and NHL.
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15
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Goldberg JS. Stereocomplexes Formed From Select Oligomers of Polymer d-lactic Acid (PDLA) and l-lactate May Inhibit Growth of Cancer Cells and Help Diagnose Aggressive Cancers-Applications of the Warburg Effect. PERSPECTIVES IN MEDICINAL CHEMISTRY 2011; 5:1-10. [PMID: 21487535 PMCID: PMC3072648 DOI: 10.4137/pmc.s6229] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
It is proposed that select oligomers of polymer d-lactic acid (PDLA) will form a stereocomplex with l-lactate in vivo, producing lactate deficiency in tumor cells. Those cancer cells that utilize transport of lactate to maintain electrical neutrality may cease to multiply or die because of lactate trapping, and those cancer cells that benefit from utilization of extracellular lactate may be impaired. Intracellular trapping of lactate produces a different physiology than inhibition of LDH because the cell loses the option of shuttling pyruvate to an alternative pathway to produce an anion. Conjugated with stains or fluorescent probes, PDLA oligomers may be an agent for the diagnosis of tissue lactate and possibly cell differentiation in biopsy specimens. Preliminary experimental evidence is presented confirming that PDLA in high concentrations is cytotoxic and that l-lactate forms a presumed stereocomplex with PDLA. Future work should be directed at isolation of biologically active oligomers of PDLA.
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Affiliation(s)
- Joel S Goldberg
- Durham Veterans Affairs Medical Center and Duke University School of Medicine
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16
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Zhang W, Huang P. Cancer-stromal interactions: role in cell survival, metabolism and drug sensitivity. Cancer Biol Ther 2011; 11:150-6. [PMID: 21191189 DOI: 10.4161/cbt.11.2.14623] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
It has been known for a long time that the interaction between cancer cells and tissue microenvironment plays a major role in cancer development, progression and metastasis. The biochemical aspect of cancer-stromal interactions, however, is less appreciated. This short review article first provides a brief summary of the communications between cancer cells and the tissue microenvironment by direct cell-cell interactions and by soluble factors, and then describes several biochemical pathways that are important for the interaction between stromal and cancer cells with respect to energy metabolism, redox balance, cell survival and drug resistance. The potential therapeutic implications of abolishing stromal protective mechanisms to overcome drug resistance are also discussed.
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Affiliation(s)
- Wan Zhang
- Department of Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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17
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Billard C, Menasria F, Quiney C, Faussat AM, Finet JP, Combes S, Kolb JP. 4-arylcoumarin analogues of combretastatins stimulate apoptosis of leukemic cells from chronic lymphocytic leukemia patients. Exp Hematol 2008; 36:1625-33. [PMID: 18922614 DOI: 10.1016/j.exphem.2008.07.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Revised: 07/07/2008] [Accepted: 07/25/2008] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To investigate the proapoptotic capacities of four arylcoumarin analogues of combretastatins on leukemic cells from B-cell chronic lymphocytic leukemia (CLL), a malignancy characterized by apoptosis deficiency. MATERIALS AND METHODS The effects of the four compounds on several nuclear, membrane, and mitochondrial events of apoptosis and on expression of proteins controlling the apoptosis were analyzed after treatment of cultured CLL patients' cells. RESULTS Treatment with all four compounds resulted in a dose-dependent internucleosomal DNA fragmentation, in stimulation of phosphatidylserine externalization, disruption of the mitochondrial transmembrane potential and caspase-3 activation. DNA fragmentation was prevented in the presence of the pan-caspase inhibitor z-VAD-fmk. Two of the compounds downregulated the expression of Mcl-1, a protein thought to be crucial for the antiapoptotic state in CLL, while Bcl-2 expression was unaffected. No effects were observed on the expression of p27kip1 or the inducible nitric oxide synthase, two proteins, which are constitutively overexpressed by CLL cells and downregulated during the apoptosis induced by other plant-derived molecules (flavopiridol, polyphenols, or hyperforin). This suggests different mechanisms of action for the compounds studied here. Furthermore, normal B lymphocytes from healthy donors appeared less sensitive than CLL cells to the proapoptotic activity of the four compounds. CONCLUSION The four arylcoumarin analogues were able to promote the apoptosis of CLL cells ex vivo through the caspase-dependent mitochondrial pathway. Therefore, these compounds may be of interest to develop new therapies of CLL based on apoptosis restoration.
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Affiliation(s)
- Christian Billard
- UMRS 872 INSERM, Université Pierre et Marie Curie-Paris 6, Paris, France.
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18
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Menasria F, Azebaze AGB, Billard C, Faussat AM, Nkengfack AE, Meyer M, Kolb JP. Apoptotic effects on B-cell chronic lymphocytic leukemia (B-CLL) cells of heterocyclic compounds isolated from Guttiferaes. Leuk Res 2008; 32:1914-26. [PMID: 18656257 DOI: 10.1016/j.leukres.2008.05.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2008] [Revised: 05/03/2008] [Accepted: 05/16/2008] [Indexed: 01/06/2023]
Abstract
A series of 10 heterocyclic compounds purified from Allanblackia were tested on two B cell lines, ESKOL and EHEB, and on cells from B-CLL patients. Several molecules inhibited the proliferation of both cell lines and promoted apoptosis of B-CLL cells through different mechanisms, some of them elicited a dissipation of the mitochondrial transmembrane potential, other triggered caspase-3 activation and cleavage of the inducible nitric oxide synthase. Blood mononuclear cells and B-lymphocytes from healthy donors appeared less sensitive than B-CLL cells. These results indicate that these molecules may be of interest in the development of new therapies for B-CLL.
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Affiliation(s)
- F Menasria
- UMRS 872 INSERM/Université Pierre et Marie Curie/Université Paris Descartes, Centre de Recherche des Cordeliers, Paris, France
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19
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Hammadi A, Billard C, Faussat AM, Kolb JP. Stimulation of iNOS expression and apoptosis resistance in B-cell chronic lymphocytic leukemia (B-CLL) cells through engagement of Toll-like receptor 7 (TLR-7) and NF-kappaB activation. Nitric Oxide 2008; 19:138-45. [PMID: 18474259 DOI: 10.1016/j.niox.2008.04.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Revised: 04/17/2008] [Accepted: 04/17/2008] [Indexed: 01/02/2023]
Abstract
B-CLL cells are characterized by in vivo resistance to apoptosis due, in part, to the presence of an inducible nitric oxide synthase, iNOS, as the NO released plays anti-apoptotic role, notably by inhibiting caspases. The mechanisms leading to spontaneous expression of iNOS in these cells are presently unknown. The restricted use of some V(H) sub-groups and the sequences of the monoclonal immunoglobulins of the B-cell receptor expressed by the leukemia cells suggested that the latter have encountered specific auto-antigens and/or microbial derived antigens. Their binding to the BCR provides an activation signal resulting in enhanced survival, hence could be involved in the aetiology of the disease. At the interface of innate and cognate immunity, Toll-like receptors, TLR, recognize PAMPs (pathogen-associated molecular patterns) expressed by various bacteria and virus as well as some self-antigens. We thus hypothesized that TLR were involved in the early steps of B-CLL oncogenesis, notably apoptosis resistance through the induction of iNOS expression and the production of NO. Our results show that B-CLL cells express TLR-7 and TLR-9. Incubation of B-CLL cells with TLR-7 agonists effectively resulted in an increased resistance to apoptosis that was reverted with the NOS inhibitor L-NMMA. This resistance was associated with enhanced iNOS expression (protein and mRNA) and NO release, stimulation of NF-kappaB activation, phosphorylation of I kappaB alpha, all these events being suppressed with wedelolactone or Bay 11-7085, two inhibitors of I kappaB alpha phosphorylation. Our present data thus suggest that TLR-7 signaling stimulates apoptosis resistance, notably through an NF-kappaB-dependent activation of the NO pathway.
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Affiliation(s)
- Amar Hammadi
- UMRS 872 INSERM/Université Pierre et Marie Curie/Université Paris Descartes, Equipe 18, Centre de Recherche des Cordeliers, 15 rue de l'Ecole de Médecine, 75270 Paris cedex 06, Paris, France
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20
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Levesque MC, Ghosh DK, Beasley BE, Chen Y, Volkheimer AD, O'Loughlin CW, Gockerman JP, Moore JO, Weinberg JB. CLL cell apoptosis induced by nitric oxide synthase inhibitors: correlation with lipid solubility and NOS1 dissociation constant. Leuk Res 2008; 32:1061-70. [PMID: 18180035 DOI: 10.1016/j.leukres.2007.11.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2007] [Revised: 09/10/2007] [Accepted: 11/15/2007] [Indexed: 11/29/2022]
Abstract
Nitric oxide synthase (NOS) inhibitors induce chronic lymphocytic leukemia (CLL) cell apoptosis and have potential as CLL therapeutics. We determined the half-maximal concentration (ED(50)) of 22 NOS inhibitors that induced CLL cell death in vitro. There was a direct correlation of the NOS1 (but not NOS2) dissociation constant (K(d)) and the hydrophobicity partitioning coefficient of each NOS inhibitor and its ED(50). NOS inhibitors that bound tightly to CLL cell NOS1 and were hydrophobic potently induced CLL cell death. CLL cell RNA and protein analyses confirmed CLL cell NOS1 expression. Our studies permit the rational selection of NOS inhibitors for testing as CLL therapeutics.
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Affiliation(s)
- Marc C Levesque
- Department of Medicine, Division of Rheumatology and Clinical Immunology, Duke University and Durham VA Medical Centers, Durham, NC 27710, United States.
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21
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Weinberg JB, Volkheimer AD, Chen Y, Beasley BE, Jiang N, Lanasa MC, Friedman D, Vaccaro G, Rehder CW, Decastro CM, Rizzieri DA, Diehl LF, Gockerman JP, Moore JO, Goodman BK, Levesque MC. Clinical and molecular predictors of disease severity and survival in chronic lymphocytic leukemia. Am J Hematol 2007; 82:1063-70. [PMID: 17654680 DOI: 10.1002/ajh.20987] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Several parameters may predict disease severity and overall survival in chronic lymphocytic leukemia (CLL). The purpose of our study of 190 CLL patients was to compare immunoglobulin heavy chain variable region (IgV(H)) mutation status, cytogenetic abnormalities, and leukemia cell CD38 and Zap-70 to older, traditional parameters. We also wanted to construct a simple, inexpensive prognosis score that would significantly predict TTT and survival in patients at the time of diagnosis and help practicing clinicians. In univariate analyses, patients with higher clinical stage, higher leukocyte count at diagnosis, shorter leukocyte doubling time, elevated serum lactate dehydrogenase (LDH), unmutated immunoglobulin heavy chain variable region (IgV(H)) genes, and higher CD38 had a shorter overall survival and time-to-treatment (TTT). CLL cell Zap-70 expression was higher in patients with unmutated IgV(H), and those with higher Zap-70 tended to have shorter survival. IgV(H)4-34 or IgV(H)1-69 was the most common IgV(H) genes used (16 and 12%, respectively). Of those with IgV(H)1-69, 86% had unmutated IgV(H) and had a significantly shorter TTT. A cytogenetic abnormality was noted in 71% of the patients tested. Patients with 11q22 del and 17p13 del or complex abnormalities were significantly more likely to have unmutated IgV(H). We found that a prognostic score constructed using modified Rai stage, cellular CD38, and serum LDH (parameters easily obtained clinically) significantly predicted TTT and survival in patients at the time of diagnosis and performed as well or better than models using the newer markers.
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MESH Headings
- ADP-ribosyl Cyclase 1/genetics
- Age of Onset
- Aged
- Female
- Follow-Up Studies
- Humans
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin Variable Region/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/mortality
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Leukemia, Lymphocytic, Chronic, B-Cell/physiopathology
- Male
- Middle Aged
- Neoplasm Staging
- Severity of Illness Index
- Survival Analysis
- Time Factors
- Virginia
- ZAP-70 Protein-Tyrosine Kinase/genetics
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Affiliation(s)
- J Brice Weinberg
- Department of Medicine, Division of Hematology, VA and Duke University Medical Centers, 508 Fulton Street, Durham, North Carolina 27705, USA.
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22
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Ghosh S, Bandyopadhyay S, Mukherjee K, Mallick A, Pal S, Mandal C, Bhattacharya DK, Mandal C. O-acetylation of sialic acids is required for the survival of lymphoblasts in childhood acute lymphoblastic leukemia (ALL). Glycoconj J 2007; 24:17-24. [PMID: 17146715 DOI: 10.1007/s10719-006-9007-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Exploiting the selective affinity of Achatinin-H towards 9-O-acetylneuraminic acid(alpha2-6)GalNAc, we have demonstrated the presence of 9-O-acetylated sialoglycoproteins (Neu5,9Ac(2)-GPs) on hematopoietic cells of children suffering from acute lymphoblastic leukemia (ALL), indicative of defective sialylation associated with this disease. The carbohydrate epitope of Neu5,9Ac(2)-GPs(ALL) was confirmed by using several synthetic sialic acid analogues. They are functionally active signaling molecules as demonstrated by their role in mediating lymphoproliferative responses and consequential increased production of IFN-gamma due to specific stimulation of Neu5,9Ac(2)-GPs on PBMC(ALL) with Achatinin-H. Cells devoid of 9-O-acetylations (9-O-AcSA(-)) revealed decreased nitric oxide production as compared to 9-O-AcSA(+) cells on exposure to IFN-gamma. Under this condition, a decrease in viability of 9-O-AcSA(-) cells as compared to 9-O-AcSA(+) cells was also observed which was reflected from increased caspase 3 activity and apoptosis suggesting the protective role of this glycotope. These Neu5,9Ac(2)-GPs are also capable of inducing disease-specific anti-Neu5,9Ac(2)-GPs antibodies in ALL children. Additionally, we have observed that disease-specific anti-Neu5,9Ac(2)-GPs have altered glycosylation profile, and they are incapable of exerting a few Fc-glycosylation-sensitive effector functions. These observations hint toward a disbalanced homeostasis, thereby enabling the cancer cells to escape host defense. Taken together, it may be hypothesized that Neu5,9Ac(2)-GPs and their antibodies play a prominent role in promoting the survival of lymphoblasts in ALL.
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Affiliation(s)
- Shyamasree Ghosh
- Immunobiology Division, Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata 700 032, India
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23
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Bakshi CS, Malik M, Carrico PM, Sellati TJ. T-bet deficiency facilitates airway colonization by Mycoplasma pulmonis in a murine model of asthma. THE JOURNAL OF IMMUNOLOGY 2006; 177:1786-95. [PMID: 16849489 DOI: 10.4049/jimmunol.177.3.1786] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Epidemiological and clinical evidence suggest a correlation between asthma and infection with atypical bacterial respiratory pathogens. However, the cellular and molecular underpinnings of this correlation remain unclear. Using the T-bet-deficient (T-bet(-/-)) murine model of asthma and the natural murine pathogen Mycoplasma pulmonis, we provide a mechanistic explanation for this correlation. In this study, we demonstrate the capacity of asthmatic airways to facilitate colonization by M. pulmonis and the capacity of M. pulmonis to exacerbate symptoms associated with acute and chronic asthma. This mutual synergism results from an inability of T-bet(-/-) mice to mount an effective immune defense against respiratory infection through release of IFN-gamma and the ability of M. pulmonis to trigger the production of Th2-type cytokines (e.g., IL-4 and IL-5), and Abs (e.g., IgG1, IgE, and IgA), eosinophilia, airway remodeling, and hyperresponsiveness; all pathophysiological hallmarks of asthma. The capacity of respiratory pathogens such as Mycoplasma spp. to dramatically augment the pathological changes associated with asthma likely explains their association with acute asthmatic episodes in juvenile patients and with adult chronic asthmatics, >50% of whom are found to be PCR positive for M. pneumoniae. In conclusion, our study demonstrates that in mice genetically predisposed to asthma, M. pulmonis infection elicits an inflammatory milieu in the lungs that skews the immune response toward the Th2-type, thus exacerbating the pathophysiological changes associated with asthma. For its part, airways exhibiting an asthmatic phenotype provide a fertile environment that promotes colonization by Mycoplasma spp. and one which is ill-equipped to kill and clear respiratory pathogens.
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Affiliation(s)
- Chandra Shekhar Bakshi
- Center for Immunology and Microbial Disease, Albany Medical College, Albany, NY 12208, USA
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24
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Quiney C, Billard C, Faussat AM, Salanoubat C, Ensaf A, Naït-Si Y, Fourneron JD, Kolb JP. Pro-apoptotic properties of hyperforin in leukemic cells from patients with B-cell chronic lymphocytic leukemia. Leukemia 2006; 20:491-7. [PMID: 16424868 DOI: 10.1038/sj.leu.2404098] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The effects of the hyperforin (HF), a natural phloroglucinol purified from Hypericum perforatum, were investigated ex vivo on leukemic cells from patients with B-cell chronic lymphocytic leukemia (B-CLL). HF was found to promote apoptosis of B-CLL cells, as shown by time- and dose-dependent stimulation of phosphatidylserine externalization and DNA fragmentation, by disruption of the mitochondrial transmembrane potential, caspase-3 activation and cleavage of the caspase substrate PARP-1. Moreover, HF-induced downregulation of Bcl-2 and Mcl-1, two antiapoptotic proteins that control mitochondrial permeability. HF also downregulated two proteins which are overexpressed by B-CLL patients' cells, the cell cycle inhibitor p27kip1 through caspase-dependent cleavage into a p23 form, and the nitric oxid (NO) synthase of type 2 (inducible NO synthase). This latter was accompanied by reduction in the production of NO known to be antiapoptotic in B-CLL cells. Preventing effects of the general caspase inhibitor z-VAD-fmk indicated that HF-promoted apoptosis of B-CLL cells was mostly caspase dependent. Furthermore, normal B lymphocytes purified from healthy donors appeared less sensitive to HF-induced apoptosis than B-CLL cells. These results indicate that HF may be of interest in the development of new therapies for B-CLL based on the induction of apoptosis and combination with cell cycle-dependent antitumor drugs.
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Affiliation(s)
- C Quiney
- UMR 736 INSERM/Université Paris VI, Centre de Recherches Biomédicales des Cordeliers, Paris, France
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25
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Secchiero P, Barbarotto E, Gonelli A, Tiribelli M, Zerbinati C, Celeghini C, Agostinelli C, Pileri SA, Zauli G. Potential pathogenetic implications of cyclooxygenase-2 overexpression in B chronic lymphoid leukemia cells. THE AMERICAN JOURNAL OF PATHOLOGY 2005; 167:1599-607. [PMID: 16314473 PMCID: PMC1613188 DOI: 10.1016/s0002-9440(10)61244-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/04/2005] [Indexed: 12/01/2022]
Abstract
Evidence suggests that cyclooxygenase-2 (COX-2) increases tumorigenic potential by promoting resistance to apoptosis. Because B chronic lymphoid leukemia (B-CLL) cells exhibit a defective apoptotic response, we analyzed CD19(+) B lymphocytes purified from the peripheral blood of B-CLL patients. Microarray analysis showed a variable (up to 38-fold) increase in the steady-state mRNA levels of COX-2 in B-CLL lymphocytes compared with normal CD19(+) B lymphocytes. The up-regulation of COX-2 in B-CLL cells was confirmed by reverse transcriptase-polymerase chain reaction and Western blot analyses. Moreover, immunohistochemical analysis of B-CLL bone marrow infiltrates confirmed clear expression of COX-2 in leukemic cells. Ex vivo treatment with the COX-2 inhibitor NS-398 significantly decreased the survival of leukemic cells by increasing the rate of spontaneous apoptosis in 13 of 16 B-CLL samples examined, but it did not affect the survival of normal lymphocytes. Pretreatment with NS-398 significantly potentiated the cytotoxicity induced by chlorambucil in 8 of 16 B-CLL samples examined. Moreover, although recombinant tumor necrosis factor-related apoptosis inducing ligand (TRAIL)/Apo2L showed little cytotoxic effect in most B-CLL samples examined, pretreatment with NS-398 sensitized 8 of 16 B-CLL samples to TRAIL-induced apoptosis. Taken together, our data indicate that COX-2 overexpression likely represents an additional mechanism of resistance to apoptosis in B-CLL and that pharmacological suppression of COX-2 might enhance chemotherapy-mediated apoptosis.
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MESH Headings
- Aged
- Aged, 80 and over
- B-Lymphocytes/enzymology
- Cell Division
- Cyclooxygenase 2/genetics
- Female
- Flow Cytometry
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/enzymology
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Lymphocytes/enzymology
- Lymphocytes/pathology
- Male
- Membrane Proteins/genetics
- Middle Aged
- Neoplasm Staging
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Affiliation(s)
- Paola Secchiero
- Department of Morphology and Embryology, Human Anatomy Section, University of Ferrara, Italy.
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26
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Ghosh S, Bandyopadhyay S, Mallick A, Pal S, Vlasak R, Bhattacharya DK, Mandal C. Interferon gamma promotes survival of lymphoblasts overexpressing 9-O-acetylated sialoglycoconjugates in childhood acute lymphoblastic leukaemia (ALL). J Cell Biochem 2005; 95:206-16. [PMID: 15770663 DOI: 10.1002/jcb.20382] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An enhanced linkage-specific 9-O-acetylated sialic acid (9-O-AcSA) on peripheral blood mononuclear cells (PBMC) of children with acute lymphoblastic leukaemia, ALL (PBMC(ALL), 9-O-AcSA+ cells) was demonstrated by using a lectin, Achatinin-H, whose lectinogenic epitope was 9-O-AcSAalpha2-6GalNAc. Our aim was to evaluate the in vitro contributory role of this glycotope (9-O-AcSAalpha2-6GalNAc) towards the survival of these 9-O-AcSA+ cells in ALL patients. For direct comparison, 9-O-AcSA- cells were generated by removing O-acetyl group of 9-O-AcSA present on PBMC(ALL) using O-acetyl esterase. An elevated level of serum interferon gamma (IFN-gamma) in affected children led us to think that PBMC(ALL) are continuously exposed specifically to this cytokine. Accordingly, 9-O-AcSA+ and 9-O-AcSA- cells were exposed in vitro to IFN-gamma. A twofold increased NO release along with inducible NO synthase (iNOS) mRNA expression by the 9-O-AcSA+ cells was observed as compared to the 9-O-AcSA- cells. The decreased viability of IFN-gamma exposed 9-O-AcSA- cells as compared to 9-O-AcSA+ cells were reflected from a 5.0-fold increased caspase-3-like activity and a 10.0-fold increased apoptosis in the 9-O-AcSA- cells when production of NO was lowered by adding competitive inhibitor of iNOS in reaction mixture. Therefore, it may be envisaged that a link exists between induction of this glycotope and their role in regulating viability of PBMC(ALL). Taken together, it is reasonable to hypothesise that O-acetylation of sialic acids on PBMC(ALL) may be an additional mechanism that promotes the survival of lymphoblasts by avoiding apoptosis via IFN-gamma-induced NO production.
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Affiliation(s)
- Shyamasree Ghosh
- Immunobiology Division, Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata-700 032, India
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27
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Levesque MC, Chen Y, Beasley BE, O'Loughlin CW, Gockerman JP, Moore JO, Weinberg JB. Chronic lymphocytic leukemia cell CD38 expression and inducible nitric oxide synthase expression are associated with serum IL-4 levels. Leuk Res 2005; 30:24-8. [PMID: 16039714 DOI: 10.1016/j.leukres.2005.05.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Accepted: 05/06/2005] [Indexed: 11/26/2022]
Abstract
B cell chronic lymphocytic leukemia (CLL) CD38 expression is variable and may predict outcome. Inducible nitric oxide synthase (NOS2) expression regulates CLL cell apoptosis. IL-4 and IFN-gamma regulate B cell CD38 expression and NOS2 expression. We compared IL-4 and IFN-gamma serum levels between CLL patients and normal individuals, and determined whether serum IL-4 and IFN-gamma levels correlated with CLL cell CD38 expression and NOS enzyme activity. IL-4 levels, but not IFN-gamma levels, differed between normal individuals and CLL patients. Furthermore, there was an association of IL-4 levels, but not IFN-gamma levels, with CD38 and NOS2 expression in CLL patients.
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Affiliation(s)
- Marc C Levesque
- Department of Medicine, Division of Rheumatology, Duke University and Durham VA Medical Centers, Durham, NC 27710, USA.
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28
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Tfelt-Hansen J, Ferreira A, Yano S, Kanuparthi D, Romero JR, Brown EM, Chattopadhyay N. Calcium-sensing receptor activation induces nitric oxide production in H-500 Leydig cancer cells. Am J Physiol Endocrinol Metab 2005; 288:E1206-13. [PMID: 15657090 DOI: 10.1152/ajpendo.00492.2004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nitric oxide (NO) is a versatile second messenger. NO is produced by Leydig cells, where NO is a negative regulator of steroidogenesis. In cancer cells, NO is thought to have mutagenic and proliferative effects. We have previously shown that the calcium-sensing receptor (CaR) has promalignant effects in rat H-500 Leydig cancer cells, a model for humoral hypercalcemia of malignancy. Calcium, the major physiological ligand of the CaR, is a recognized intracellular cofactor in the process of NO production by virtue of its positive modulation of neuronal and endothelial nitric oxide synthase (NOS), but importantly, not of inducible (i) NOS activity. iNOS activity is regulated by changes in its expression level. Therefore, we investigated whether CaR activation changes iNOS expression. We found that high extracellular calcium (Cao2+) upregulates the level of mRNA for iNOS, whereas no change was seen in neuronal or endothelial NOS, as assessed by microarray and real-time PCR, respectively. The high Cao2+-induced iNOS upregulation was also detected by Northern and Western blotting. By quantitative real-time PCR, we showed that calcium maximally upregulates iNOS at 18 h. The effect of calcium was abolished by overexpression of a dominant-negative CaR (R185Q), confirming that the effect of Cao2+ was mediated by the CaR. Cells treated with high calcium had higher NO production than those treated with low calcium, as detected with the NO-specific DAF2-AM dye. This was confirmed in single-cell fluorescence determinations using confocal microscopy. In conclusion, high calcium upregulates the levels of iNOS mRNA and protein as well as NO production in H-500 cells, and the effect of Cao2+ on iNOS expression is mediated by the CaR.
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Affiliation(s)
- Jacob Tfelt-Hansen
- Division of Endocrinology, Diabetes, and Hypertension, Department of Medicine and Membrane Biology Program, Harvard Medical School, Boston, Massachusetts, USA.
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29
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Kay NE, Bone ND, Lee YK, Jelinek DF, Leland P, Battle TE, Frank DA, Puri RK. A recombinant IL-4-Pseudomonas exotoxin inhibits protein synthesis and overcomes apoptosis resistance in human CLL B cells. Leuk Res 2005; 29:1009-18. [PMID: 16038727 DOI: 10.1016/j.leukres.2004.11.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2004] [Accepted: 11/19/2004] [Indexed: 02/06/2023]
Abstract
We have determined that CLL B cells consistently express type 3 membrane receptors for the Th2-derived cytokine IL-4 (IL-4R). Furthermore, when added to CLL B cells, IL-4 induces increased apoptosis resistance, increased protein synthesis in CLL B cells and rapid onset activation of STAT1, STAT5 and STAT6. Since the IL-4-IL-4R pathway is intact in CLL B cells and is related to apoptosis resistance, we considered whether we could target this pathway. A recombinant IL-4 Pseudomonas exotoxin fusion protein (IL-4 PE), known to bind to IL-4R, was incubated with CLL B cells. IL-4 PE (10 ng/ml) cultured with CLL B cells resulted in an increase of apoptosis/death from mean levels of 46.6+/-7.0 of non-exposed cells to 69+/-8.6 (n=6). By measuring in vitro protein synthesis, two predominant patterns of sensitivity were observed. In one, CLL B cell clones (n=4) were found to be extremely sensitive to IL-4 PE (IC50's range=6-25 ng/ml). In the second, low concentrations of IL-4 PE induced agonist activity while increasing concentrations induced cytotoxicity in 6 of 21 patient-derived cells. These studies suggest that the IL-4R, on B-CLL cells, can serve as a unique molecular target for directing cytotoxic agents in the therapy of B-CLL.
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Affiliation(s)
- Neil E Kay
- Mayo Clinic, Stabile 628, 200 First Street SW, Rochester, MN 55905, USA.
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30
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Ghosh S, Bandyopadhyay S, Pal S, Das B, Bhattacharya DK, Mandal C. Increased interferon gamma production by peripheral blood mononuclear cells in response to stimulation of overexpressed disease-specific 9-O-acetylated sialoglycoconjugates in children suffering from acute lymphoblastic leukaemia. Br J Haematol 2005; 128:35-41. [PMID: 15606547 DOI: 10.1111/j.1365-2141.2004.05256.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Disease-specific over-expression of 9-O-acetylated sialoglycoconjugates (9-O-AcSGs) on peripheral blood mononuclear cells (PBMC) of children with acute lymphoblastic leukaemia (ALL, PBMC(ALL)) has been demonstrated using a lectin, Achatinin-H, with specificity towards 9-O-AcSAalpha2-6GalNAc. This study investigated the contributory role of 9-O-AcSGs induced on PBMC(ALL). Stimulation of PBMC(ALL) with Achatinin-H through 9-O-AcSGs led to a lymphoproliferative response with a significantly increased interferon-gamma (IFN-gamma) production when compared with unstimulated cells as demonstrated by enzyme-linked immunosorbent assay and mRNA expression. Under identical conditions, PBMC(ALL) ablated of O-acetylations did not respond to such stimulation. In summary, it may be concluded that stimulation of over-expressed 9-O-AcSGs regulate signalling for proliferation, leading to the release of IFN-gamma. Controlled expression of these molecules may be exploited as potential targets for therapy, promising beneficial effects to children with ALL.
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Affiliation(s)
- Shyamasree Ghosh
- Immunobiology Division, Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata, India
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31
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Quiney C, Dauzonne D, Kern C, Fourneron JD, Izard JC, Mohammad RM, Kolb JP, Billard C. Flavones and polyphenols inhibit the NO pathway during apoptosis of leukemia B-cells. Leuk Res 2004; 28:851-61. [PMID: 15203283 DOI: 10.1016/j.leukres.2003.12.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Accepted: 12/14/2003] [Indexed: 12/31/2022]
Abstract
We recently reported that resveratrol, a grape-derived polyphenol, in vitro induces the apoptosis of leukemic B-cells and simultaneously inhibits the production of endogenous nitric oxide (NO) through inducible NO synthase (iNOS) down-regulation. The same results were observed in the present study with not only acetate derivatives of polyphenols, particularly the pentaacetate of -viniferin (resveratrol dimer), but also with a synthetic flavone (a diaminomethoxyflavone) in both leukemia B-cell lines and B-cell chronic lymphocytic leukemia (B-CLL) patients' cells. Moreover, flavopiridol, another flavone already known for its pro-apoptotic properties in B-CLL cells, was also found to down-regulate both iNOS expression and NO production. Thus, inhibition of the NO pathway during apoptosis of leukemia B-cells appears a common mechanism for several compounds belonging to two distinct families of phytoalexins, the flavones and grape-derived polyphenols.
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Affiliation(s)
- Claire Quiney
- INSERM E 355, Centre Biomédical des Cordeliers, 15 rue de l'Ecole de Médecine, 75006 Paris, France
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32
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Billard C, Kern C, Tang R, Ajchenbaum-Cymbalista F, Kolb JP. Flavopiridol downregulates the expression of both the inducible NO synthase and p27(kip1) in malignant cells from B-cell chronic lymphocytic leukemia. Leukemia 2004; 17:2435-43. [PMID: 14523476 DOI: 10.1038/sj.leu.2403139] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Flavopiridol, an inhibitor of cyclin-dependent kinases and other protein kinases, induces in vitro apoptosis of malignant cells from B-cell chronic lymphocytic leukemia (B-CLL). Previously, we reported that nitric oxide (NO), produced by an inducible NO synthase (iNOS), spontaneously expressed by the B-CLL cells, contributed to their deficiency in apoptosis. In the present work, we show that ex vivo treatment of leukemic cells from B-CLL patients with flavopiridol results in the inhibition of iNOS expression, as determined by immunofluorescence and Western blotting, and in a marked inhibition of NO production measured in situ with a specific fluorescent probe (DAF-2 DA). These effects are accompanied by membrane, mitochondrial and nuclear events of apoptosis. Flavopiridol exposure also results in the stimulation of caspase 3 activity and in caspase-dependent cleavage of p27(kip1), a negative regulator of the cell cycle, which is overexpressed in B-CLL. Thus, flavopiridol is capable of downregulating both iNOS and p27(kip1) expression in B-CLL cells. Furthermore, flavopiridol-promoted apoptosis is partly reverted by an NO donor, suggesting that inhibition of the NO pathway could participate in the apoptotic effects of flavopiridol on the leukemic cells.
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Affiliation(s)
- C Billard
- U 365 INSERM, Institut Curie, Paris, France
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33
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Tiscornia AC, Cayota A, Landoni AI, Brito C, Oppezzo P, Vuillier F, Robello C, Dighiero G, Gabús R, Pritsch O. Post-transcriptional regulation of inducible nitric oxide synthase in chronic lymphocytic leukemia B cells in pro- and antiapoptotic culture conditions. Leukemia 2003; 18:48-56. [PMID: 14574328 DOI: 10.1038/sj.leu.2403169] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Functional inducible NOS (iNOS) may be involved in the prolonged lifespan of chronic lymphocytic leukemia cells (B-CLL), although the exact mechanisms implicated remain elusive as yet. In this work, we have examined iNOS expression in normal B lymphocytes and B-CLL cells in pro- and antiapoptotic conditions. Our results demonstrate: (1) The existence of a new splice variant characterized by a complete deletion of exon 14 (iNOS 13-16(14del)), which was preferentially detected in normal B lymphocytes and may represent an isoform that could play a role in the regulation of enzyme activity. (2) The existence of another alternatively spliced iNOS mRNA transcript involving a partial deletion of the flavodoxin region (iNOS 13-16(neg)) was correlated to a decreased B-CLL cell viability. The 9-beta-D-arabinofuranosyl-2-fluoradenine or fludarabine (F-ara) treatment induced iNOS 13-16(neg) transcript variants, whereas IL-4 enhanced both the transcription of variants, including these exons (iNOS 13-16(pos)), and the expression of a 122 kDa iNOS protein. These results suggest that in B-CLL, a regulation process involving nitric oxide (.- NO) levels could occur by a post-transcriptional mechanism mediated by soluble factors. Our results also provide an insight into a new complementary proapoptotic action of F-ara in B-CLL by the induction of particular iNOS splice variants, leading to the activation of a caspase-3-dependent apoptotic pathway.
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MESH Headings
- Aged
- Aged, 80 and over
- Alternative Splicing
- Antineoplastic Agents/pharmacology
- Apoptosis/physiology
- B-Lymphocytes/enzymology
- Base Sequence
- Caspase 3
- Caspases/metabolism
- DNA (Cytosine-5-)-Methyltransferases/antagonists & inhibitors
- Female
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Leukemic
- Humans
- Interleukin-4/pharmacology
- Isoenzymes
- Leukemia, Lymphocytic, Chronic, B-Cell/enzymology
- Male
- Middle Aged
- Molecular Sequence Data
- Nitric Oxide/physiology
- Nitric Oxide Synthase/genetics
- Nitric Oxide Synthase Type II
- RNA Processing, Post-Transcriptional
- RNA, Messenger/metabolism
- Sequence Deletion
- Sequence Homology, Nucleic Acid
- Signal Transduction
- Transcription, Genetic
- Vidarabine/analogs & derivatives
- Vidarabine/pharmacology
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Affiliation(s)
- A C Tiscornia
- Departamento de Bioquímica, de la Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
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