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Hamza E, Vallejo-Mudarra M, Ouled-Haddou H, García-Caballero C, Guerrero-Hue M, Santier L, Rayego-Mateos S, Larabi IA, Alvarez JC, Garçon L, Massy ZA, Choukroun G, Moreno JA, Metzinger L, Meuth VML. Indoxyl sulfate impairs erythropoiesis at BFU-E stage in chronic kidney disease. Cell Signal 2023; 104:110583. [PMID: 36596353 DOI: 10.1016/j.cellsig.2022.110583] [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: 10/13/2022] [Revised: 12/16/2022] [Accepted: 12/29/2022] [Indexed: 01/01/2023]
Abstract
Chronic kidney disease (CKD) is a global health condition characterized by a progressive deterioration of kidney function. It is associated with high serum levels of uremic toxins (UT), such as Indoxyl Sulfate (IS), which may participate in the genesis of several uremic complications. Anemia is one of the major complications in CKD patients that contribute to cardiovascular disease, increase morbi-mortality, and is associated with a deterioration of kidney failure in these patients. Our study aimed to characterize the impact of IS on CKD-related erythropoiesis. Using cellular and pre-clinical models, we studied cellular and molecular effects of IS on the growth and differentiation of erythroid cells. First, we examined the effect of clinically relevant concentrations of IS (up to 250 μM) in the UT7/EPO cell line. IS at 250 μM increased apoptosis of UT7/EPO cells at 48 h compared to the control condition. We confirmed this apoptotic effect of IS in erythropoiesis in human primary CD34+ cells during the later stages of erythropoiesis. Then, in IS-treated human primary CD34+ cells and in a (5/6 Nx) mice model, a blockage at the burst-forming unit-erythroid (BFU-E) stage of erythropoiesis was also observed. Finally, IS deregulates a number of erythropoietic related genes such as GATA-1, Erythropoietin-Receptor (EPO-R), and β-globin. Our findings suggest that IS could affect cell viability and differentiation of erythroid progenitors by altering erythropoiesis and contributing to the development of anemia in CKD.
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Affiliation(s)
- Eya Hamza
- HEMATIM UR 4666, C.U.R.S, University of Picardie Jules Verne, CEDEX 1, 80025, Amiens, France
| | - Mercedes Vallejo-Mudarra
- Maimonides Biomedical Research Institute of Cordoba (IMIBIC), UGC Nephrology, Hospital Universitario Reina Sofía, 14004 Córdoba, Spain
| | - Hakim Ouled-Haddou
- HEMATIM UR 4666, C.U.R.S, University of Picardie Jules Verne, CEDEX 1, 80025, Amiens, France
| | - Cristina García-Caballero
- Maimonides Biomedical Research Institute of Cordoba (IMIBIC), UGC Nephrology, Hospital Universitario Reina Sofía, 14004 Córdoba, Spain
| | - Melania Guerrero-Hue
- Maimonides Biomedical Research Institute of Cordoba (IMIBIC), UGC Nephrology, Hospital Universitario Reina Sofía, 14004 Córdoba, Spain
| | - Laure Santier
- HEMATIM UR 4666, C.U.R.S, University of Picardie Jules Verne, CEDEX 1, 80025, Amiens, France
| | - Sandra Rayego-Mateos
- Cellular Biology in Renal Diseases Laboratory, IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain
| | - Islam Amine Larabi
- Service de Pharmacologie-Toxicologie, Groupe Hospitalier Universitaires AP-HP, Paris-Saclay, Hôpital Raymond Poincaré, FHU Sepsis, 92380 Garches, France; MasSpecLab, Plateforme de spectrométrie de masse, Inserm U-1173, Université Paris Saclay (Versailles Saint Quentin-en-Yvelines), 78180 Montigny-le-Bretonneux, France
| | - Jean-Claude Alvarez
- Service de Pharmacologie-Toxicologie, Groupe Hospitalier Universitaires AP-HP, Paris-Saclay, Hôpital Raymond Poincaré, FHU Sepsis, 92380 Garches, France; MasSpecLab, Plateforme de spectrométrie de masse, Inserm U-1173, Université Paris Saclay (Versailles Saint Quentin-en-Yvelines), 78180 Montigny-le-Bretonneux, France
| | - Loïc Garçon
- HEMATIM UR 4666, C.U.R.S, University of Picardie Jules Verne, CEDEX 1, 80025, Amiens, France; Service d'Hématologie Biologique, Centre Hospitalier Universitaire, Amiens, France
| | - Ziad A Massy
- Centre for Research in Epidemiology and Population Health (CESP), University Paris-Saclay, University Versailles-Saint Quentin, Inserm UMRS 1018, Clinical Epidemiology Team, Villejuif, France; Department of Nephrology, CHU Ambroise Paré, APHP, 92104 Boulogne Billancourt, Paris Cedex, France
| | - Gabriel Choukroun
- Department of Nephrology Dialysis Transplantation, Amiens University Medical Center, F-80000 Amiens, France; MP3CV Laboratory, EA7517, Jules Verne University of Picardie, F-80000 Amiens, France
| | - Juan Antonio Moreno
- Maimonides Biomedical Research Institute of Cordoba (IMIBIC), UGC Nephrology, Hospital Universitario Reina Sofía, 14004 Córdoba, Spain; Biomedical Research Networking Center on Cardiovascular Diseases (CIBERCV), 28029 Madrid, Spain; Department of Cell Biology, Physiology and Immunology, University of Cordoba, 14014 Cordoba, Spain
| | - Laurent Metzinger
- HEMATIM UR 4666, C.U.R.S, University of Picardie Jules Verne, CEDEX 1, 80025, Amiens, France.
| | - Valérie Metzinger-Le Meuth
- HEMATIM UR 4666, C.U.R.S, University of Picardie Jules Verne, CEDEX 1, 80025, Amiens, France; INSERM UMRS 1148, Laboratory for Vascular Translational Science (LVTS), UFR SMBH, University Sorbonne Paris Nord, 93000 Bobigny, France
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Matsukuma H, Kobayashi Y, Oka S, Higashijima F, Kimura K, Yoshihara E, Sasai N, Shiraishi K. Prominin-1 deletion results in spermatogenic impairment, sperm morphological defects, and infertility in mice. Reprod Med Biol 2023; 22:e12514. [PMID: 37292088 PMCID: PMC10244806 DOI: 10.1002/rmb2.12514] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/30/2023] [Accepted: 04/09/2023] [Indexed: 06/10/2023] Open
Abstract
Purpose Spermatogenesis is a complex process orchestrated by several essential genes. Prominin-1 (Prom1/PROM1) is a gene that is expressed in the testis but with a poorly understood role in spermatogenesis. Methods We used Prom1 knockout (Prom1 KO) mice to assess the role of Prom1 in spermatogenesis. To this end, we performed immunohistochemistry, immunofluorescence, western blotting, β-galactosidase staining, and apoptosis assay. Additionally, we analyzed the morphology of sperm and assessed litter sizes. Results We observed that PROM1 is localized to the dividing spermatocytes in seminiferous epithelial cells, sperm, and columnar epithelium in the epididymis. In the Prom1 KO testis, an aberrant increase in apoptotic cells and a decrease in proliferating seminiferous epithelial cells were observed. Cellular FLICE-like inhibitory protein (c-FLIP) and extracellular signal-regulated kinase 1/2 (ERK1/2) expression were also significantly decreased in Prom1 KO testis. In addition, a significantly increased number of epididymal spermatozoa with abnormal morphology and less motility was found in Prom1 KO mice. Conclusions PROM1 maintains spermatogenic cell proliferation and survival via c-FLIP expression in the testis. It is also involved in sperm motility and fertilization potential. The mechanism underlying the effect of Prom1 on sperm morphology and motility remains to be identified.
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Affiliation(s)
- Haruka Matsukuma
- Department of Urology, School of MedicineYamaguchi UniversityUbeJapan
| | - Yuka Kobayashi
- Department of Ophthalmology, School of MedicineYamaguchi UniversityUbeJapan
| | - Shintaro Oka
- Department of Urology, School of MedicineYamaguchi UniversityUbeJapan
| | | | - Kazuhiro Kimura
- Department of Ophthalmology, School of MedicineYamaguchi UniversityUbeJapan
| | - Erika Yoshihara
- Developmental Biomedical Science, Division of Biological SciencesNara Institute of Science and Technology IkomaNaraJapan
| | - Noriaki Sasai
- Developmental Biomedical Science, Division of Biological SciencesNara Institute of Science and Technology IkomaNaraJapan
| | - Koji Shiraishi
- Department of Urology, School of MedicineYamaguchi UniversityUbeJapan
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Watanabe A, Togi M, Koya T, Taniguchi M, Sakamoto T, Iwabuchi K, Kato T, Shimodaira S. Identification of CD56 dim subpopulation marked with high expression of GZMB/PRF1/PI-9 in CD56 + interferon-α-induced dendritic cells. Genes Cells 2021; 26:313-327. [PMID: 33662167 DOI: 10.1111/gtc.12844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/15/2021] [Accepted: 02/28/2021] [Indexed: 01/08/2023]
Abstract
As the sentinels of innate and adaptive immune system, dendritic cells (DCs) have been considered to hold a great promise for medical application. Among the diverse types of DCs, monocyte-derived DCs (mo-DCs) generated in vitro have been most commonly employed. We have been improving the culture protocol and devised a protocol to produce mature interferon-α-induced DCs (IFN-DCs), hereinafter called (mat)IFN-DCs. While exploring the relationship between the expression of CD56 and the cytotoxic activity of (mat)IFN-DCs, we unexpectedly found that sorting of (mat)IFN-DCs with CD56 antibody-coated microbeads (MB) resulted in fractionating cells with tumoricidal activity into the flow-through (FT) but not MB-bound fraction. We uncovered that the FT fraction contains cells expressing low but substantial level of CD56. Moreover, those cells express granzyme B (GrB), perforin (PFN), and serpin B9 at high levels. By employing a specific inhibitor of PFN, we confirmed that direct tumoricidal activity relies on the GrB/PFN pathway. We designated subpopulation in FT fraction as CD56dim and that in CD56 positively sorted fraction as CD56bright , respectively. This is the first time, to our knowledge, to identify subpopulations of CD56-positive IFN-DCs with distinct tumoricidal activity which is ascribed to high expression of the components of GrB/PFN pathway.
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Affiliation(s)
- Asuka Watanabe
- Department of Regenerative Medicine, School of Medicine, Kanazawa Medical University, Kahoku-gun, Japan
| | - Misa Togi
- Department of Regenerative Medicine, School of Medicine, Kanazawa Medical University, Kahoku-gun, Japan.,Division of Stem Cell Medicine, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Kahoku-gun, Japan
| | - Terutsugu Koya
- Department of Regenerative Medicine, School of Medicine, Kanazawa Medical University, Kahoku-gun, Japan
| | - Makoto Taniguchi
- Division of Genome Damage Response Research, Department of Life Science, Medical Research Institute, Kanazawa Medical University, Kahoku-gun, Japan
| | - Takuya Sakamoto
- Department of Regenerative Medicine, School of Medicine, Kanazawa Medical University, Kahoku-gun, Japan
| | - Kuniyoshi Iwabuchi
- Division of Genome Damage Response Research, Department of Life Science, Medical Research Institute, Kanazawa Medical University, Kahoku-gun, Japan.,Department of Biochemistry I, School of Medicine, Kanazawa Medical University, Kahoku-gun, Japan
| | - Tomohisa Kato
- Division of Stem Cell Medicine, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Kahoku-gun, Japan
| | - Shigetaka Shimodaira
- Department of Regenerative Medicine, School of Medicine, Kanazawa Medical University, Kahoku-gun, Japan.,Division of Stem Cell Medicine, Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Kahoku-gun, Japan
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Thapa B, Kc R, Uludağ H. TRAIL therapy and prospective developments for cancer treatment. J Control Release 2020; 326:335-349. [PMID: 32682900 DOI: 10.1016/j.jconrel.2020.07.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/01/2020] [Accepted: 07/11/2020] [Indexed: 12/22/2022]
Abstract
Tumor Necrosis Factor (TNF) Related Apoptosis-Inducing Ligand (TRAIL), an immune cytokine of TNF-family, has received much attention in late 1990s as a potential cancer therapeutics due to its selective ability to induce apoptosis in cancer cells. TRAIL binds to cell surface death receptors, TRAIL-R1 (DR4) and TRAIL-R2 (DR5) and facilitates formation of death-inducing signaling complex (DISC), eventually activating the p53-independent apoptotic cascade. This unique mechanism makes the TRAIL a potential anticancer therapeutic especially for p53-mutated tumors. However, recombinant human TRAIL protein (rhTRAIL) and TRAIL-R agonist monoclonal antibodies (mAb) failed to exert robust anticancer activities due to inherent and/or acquired resistance, poor pharmacokinetics and weak potencies for apoptosis induction. To get TRAIL back on track as a cancer therapeutic, multiple strategies including protein modification, combinatorial approach and TRAIL gene therapy are being extensively explored. These strategies aim to enhance the half-life and bioavailability of TRAIL and synergize with TRAIL action ultimately sensitizing the resistant and non-responsive cells. We summarize emerging strategies for enhanced TRAIL therapy in this review and cover a wide range of recent technologies that will provide impetus to rejuvenate the TRAIL therapeutics in the clinical realm.
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Affiliation(s)
- Bindu Thapa
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada.
| | - Remant Kc
- Department of Chemical & Material Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, Canada.
| | - Hasan Uludağ
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada; Department of Chemical & Material Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, Canada; Department of Biomedical Engineering, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, Canada.
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Safa AR, Kamocki K, Saadatzadeh MR, Bijangi-Vishehsaraei K. c-FLIP, a Novel Biomarker for Cancer Prognosis, Immunosuppression, Alzheimer's Disease, Chronic Obstructive Pulmonary Disease (COPD), and a Rationale Therapeutic Target. BIOMARKERS JOURNAL 2019; 5:4. [PMID: 32352084 PMCID: PMC7189798 DOI: 10.36648/2472-1646.5.1.59] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Dysregulation of c-FLIP (cellular FADD-like IL-1β-converting enzyme inhibitory protein) has been shown in several diseases including cancer, Alzheimer's disease, and chronic obstructive pulmonary disease (COPD). c-FLIP is a critical anti-cell death protein often overexpressed in tumors and hematological malignancies and its increased expression is often associated with a poor prognosis. c-FLIP frequently exists as long (c-FLIPL) and short (c-FLIPS) isoforms, regulates its anti-cell death functions through binding to FADD (FAS associated death domain protein), an adaptor protein known to activate caspases-8 and -10 and links c-FLIP to several cell death regulating complexes including the death-inducing signaling complex (DISC) formed by various death receptors. c-FLIP also plays a critical role in necroptosis and autophagy. Furthermore, c-FLIP is able to activate several pathways involved in cytoprotection, proliferation, and survival of cancer cells through various critical signaling proteins. Additionally, c-FLIP can inhibit cell death induced by several chemotherapeutics, anti-cancer small molecule inhibitors, and ionizing radiation. Moreover, c-FLIP plays major roles in aiding the survival of immunosuppressive tumor-promoting immune cells and functions in inflammation, Alzheimer's disease (AD), and chronic obstructive pulmonary disease (COPD). Therefore, c-FLIP can serve as a versatile biomarker for cancer prognosis, a diagnostic marker for several diseases, and an effective therapeutic target. In this article, we review the functions of c-FLIP as an anti-apoptotic protein and negative prognostic factor in human cancers, and its roles in resistance to anticancer drugs, necroptosis and autophagy, immunosuppression, Alzheimer's disease, and COPD.
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Affiliation(s)
- Ahmad R Safa
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, USA
| | - Krzysztof Kamocki
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, USA
| | - M Reza Saadatzadeh
- Department of Neurosurgery, Indiana University School of Medicine, Indianapolis, USA
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Zheng B, Mao JH, Li XQ, Qian L, Zhu H, Gu DH, Pan XD. Over-expression of DNA-PKcs in renal cell carcinoma regulates mTORC2 activation, HIF-2α expression and cell proliferation. Sci Rep 2016; 6:29415. [PMID: 27412013 PMCID: PMC4944168 DOI: 10.1038/srep29415] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 06/13/2016] [Indexed: 12/23/2022] Open
Abstract
Here, we demonstrated that DNA-PKcs is over-expressed in multiple human renal cell carcinoma (RCC) tissues and in primary/established human RCCs. Pharmacological or genetic inhibition of DNA-PKcs suppressed proliferation of RCC cells. DNA-PKcs was in the complex of mTOR and SIN1, mediating mTORC2 activation and HIF-2α expression in RCC cells. Inhibiting or silencing DNA-PKcs suppressed AKT Ser-473 phosphorylation and HIF-2α expression. In vivo, DNA-PKcs knockdown or oral administration of the DNA-PKcs inhibitor NU-7441 inhibited AKT Ser-473 phosphorylation, HIF-2α expression and 786-0 RCC xenograft growth in nude mice. We showed that miRNA-101 level was decreased in RCC tissues/cells, which could be responsible for DNA-PKcs overexpression and DNA-PKcs mediated oncogenic actions in RCC cells. We show that DNA-PKcs over-expression regulates mTORC2-AKT activation, HIF-2α expression and RCC cell proliferation.
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Affiliation(s)
- Bing Zheng
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Jia-Hui Mao
- Department of pathophysiology, Nantong University School of Medicine, Nantong, China
| | - Xiao-Qing Li
- Department of pathophysiology, Nantong University School of Medicine, Nantong, China
| | - Lin Qian
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Hua Zhu
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Dong-Hua Gu
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Xiao-Dong Pan
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong 226000, China
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Medunjanin S, Daniel JM, Weinert S, Dutzmann J, Burgbacher F, Brecht S, Bruemmer D, Kahne T, Naumann M, Sedding DG, Zuschratter W, Braun-Dullaeus RC. DNA-dependent protein kinase (DNA-PK) permits vascular smooth muscle cell proliferation through phosphorylation of the orphan nuclear receptor NOR1. Cardiovasc Res 2015; 106:488-97. [DOI: 10.1093/cvr/cvv126] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 03/31/2015] [Indexed: 11/14/2022] Open
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La leptine : un modulateur de l’activité des cellules Natural Killer ? NUTR CLIN METAB 2015. [DOI: 10.1016/j.nupar.2014.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Hu H, Gu Y, Qian Y, Hu B, Zhu C, Wang G, Li J. DNA-PKcs is important for Akt activation and gemcitabine resistance in PANC-1 pancreatic cancer cells. Biochem Biophys Res Commun 2014; 452:106-11. [PMID: 25152407 DOI: 10.1016/j.bbrc.2014.08.059] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 08/13/2014] [Indexed: 12/17/2022]
Abstract
Pancreatic cancer is one of the most aggressive human malignancies with extremely poor prognosis. The moderate activity of the current standard gemcitabine and gemcitabine-based regimens was due to pre-existing or acquired chemo-resistance of pancreatic cancer cells. In this study, we explored the potential role of DNA-dependent protein kinase catalytic subunit (DNA-PKcs) in gemcitabine resistance, and studied the underlying mechanisms. We found that NU-7026 and NU-7441, two DNA-PKcs inhibitors, enhanced gemcitabine-induced cytotoxicity and apoptosis in PANC-1 pancreatic cancer cells. Meanwhile, PANC-1 cells with siRNA-knockdown of DNA-PKcs were more sensitive to gemcitabine than control PANC-1 cells. Through the co-immunoprecipitation (Co-IP) assay, we found that DNA-PKcs formed a complex with SIN1, the latter is an indispensable component of mammalian target of rapamycin (mTOR) complex 2 (mTORC2). DNA-PKcs-SIN1 complexation was required for Akt activation in PANC-1 cells, while inhibition of this complex by siRNA knockdown of DNA-PKcs/SIN1, or by DNA-PKcs inhibitors, prevented Akt phosphorylation in PANC-1 cells. Further, SIN1 siRNA-knockdown also facilitated gemcitabine-induced apoptosis in PANC-1 cells. Finally, DNA-PKcs and p-Akt expression was significantly higher in human pancreatic cancer tissues than surrounding normal tissues. Together, these results show that DNA-PKcs is important for Akt activation and gemcitabine resistance in PANC-1 pancreatic cancer cells.
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Affiliation(s)
- Hao Hu
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China.
| | - Yuanlong Gu
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China
| | - Yi Qian
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China
| | - Benshun Hu
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China
| | - Congyuan Zhu
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China
| | - Gaohe Wang
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China
| | - Jianping Li
- The Hepatobiliary Center, The Third Hospital Affiliated to Nantong University, Wuxi City, Jiangsu Province 214000, China.
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Tang X, Yuan F, Guo K. Repair of radiation damage of U2OS osteosarcoma cells is related to DNA-dependent protein kinase catalytic subunit (DNA-PKcs) activity. Mol Cell Biochem 2014; 390:51-9. [PMID: 24390088 DOI: 10.1007/s11010-013-1955-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 12/19/2013] [Indexed: 10/25/2022]
Abstract
The present study was to investigate the effects of DNA-PKcs deficiencies on radiation sensitivity of human osteosarcoma U2OS cells to γ-ray and to explore the underlying molecular mechanism. In vitro, U2OS cells were transfected with different DNA-PKcs siRNAs or control siRNAs to establish stably siRNA-transfected cell lines U2OS-Si and U2OS-Sc, respectively. Cell viability and apoptosis after irradiation were analyzed using cell counting kit (CCK-8) and flow cytometric assay, respectively. Expressions of apoptosis-related and oxidative stress-responded proteins were assessed using Western blot. The tumorigenesis activity was examined in nude mice xenograft osteosarcoma mode. Results showed that DNA-PKcs siRNA significantly could inhibit U2OS viability and cell proliferation after exposure to irradiation. Compared with the U2OS and U2OS-Sc cells, the U2OS-Si cells induced higher apoptosis rate and loss of mitochondrial membrane potentials, accompanying with more reactive oxygen species (ROS) and malondialdehyde (MDA) production, increased DNA double-strand breaks (DSBs) induced by irradiation. Protein levels of the anti-apoptotic Bcl-2 were downregulated most obviously in U2OS-Si cells after irradiation, while pro-apoptotic factor Bax and caspase-3 upregulated. Moreover, the antioxidants protein expression levels of Nuclear factor-erythroid 2-related factor 2 (Nrf2) and its target heme oxygenase-1 (HO-1) were also significantly reduced in parallel to DNA-PKcs inhibition in U2OS-Si cells. In nude mice xenograft model, DNA-PKcs siRNA remarkably inhibited tumor growth and dissemination. In conclusion, DNA-PKcs siRNA might have a potential for osteosarcoma treatment by sensitizing osteosarcoma cells to γ-ray through modulation on oxidative stress-mediated DNA DSBs repair and mitochondrial pathway apoptosis.
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Affiliation(s)
- Xianye Tang
- Orthopaedic Department of Affiliated Hospital of Xuzhou Medical College, Jiangsu, 223000, China
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Tu Y, Ji C, Yang B, Yang Z, Gu H, Lu CC, Wang R, Su ZL, Chen B, Sun WL, Xia JP, Bi ZG, He L. DNA-dependent protein kinase catalytic subunit (DNA-PKcs)-SIN1 association mediates ultraviolet B (UVB)-induced Akt Ser-473 phosphorylation and skin cell survival. Mol Cancer 2013; 12:172. [PMID: 24365180 PMCID: PMC3922905 DOI: 10.1186/1476-4598-12-172] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 12/10/2013] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND The exposure of skin keratinocytes to Ultraviolet (UV) irradiation leads to Akt phosphorylation at Ser-473, which is important for the carcinogenic effects of excessive sun exposure. The present study investigated the underlying mechanism of Akt Ser-473 phosphorylation by UVB radiation. RESULTS We found that DNA-dependent protein kinase catalytic subunit (DNA-PKcs) and mammalian target of rapamycin (mTOR) complex 2 (mTORC2) were both required for UVB-induced Akt Ser-473 phosphorylation in keratinocytes. Inhibition of DNA-PKcs activity via its inhibitor NU7026, a dominant-negative kinase-dead mutation, RNA interference (RNAi) or gene depletion led to the attenuation of UVB-induced Akt Ser-473 phosphorylation. Meanwhile, siRNA silencing or gene depletion of SIN1, a key component of mTORC2, abolished Akt Ser-473 phosphorylation by UVB. Significantly, we discovered that DNA-PKcs was associated with SIN1 in cytosol upon UVB radiation, and this complexation appeared required for Akt Ser-473 phosphorylation. Meanwhile, this DNA-PKcs-SIN1 complexation by UVB was dependent on epidermal growth factor receptor (EGFR) activation, and was disrupted by an EGFR inhibitor (AG1478) or by EGFR depletion. UVB-induced complexation between DNA-PKcs and mTORC2 components was also abolished by NU7026 and DNA-PKcs mutation. Finally, we found that both DNA-PKcs and SIN1 were associated with apoptosis resistance of UVB radiation, and inhibition of them by NU7026 or genetic depletion significantly enhanced UVB-induced cell death and apoptosis. CONCLUSION Taken together, these results strongly suggest that DNA-PKcs-mTORC2 association is required for UVB-induced Akt Ser-473 phosphorylation and cell survival, and might be important for tumor cell transformation.
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Affiliation(s)
| | - Chao Ji
- Department of Dermatology, The First Affiliated Hospital of Kunming Medical University, Yunnan Provincial Institute of Dermatology, Kunming 650032, Yunnan, China.
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van Griensven LJ, Verhoeven HA. Phellinus linteus polysaccharide extracts increase the mitochondrial membrane potential and cause apoptotic death of THP-1 monocytes. Chin Med 2013; 8:25. [PMID: 24344650 PMCID: PMC3878362 DOI: 10.1186/1749-8546-8-25] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 12/08/2013] [Indexed: 12/05/2022] Open
Abstract
Background The differentiation resp. death of human monocytic THP-1 cells induced by polysaccharide extracts of the medicinal mushrooms Phellinus linteus, Agaricus bisporus and Agaricus brasiliensis have been studied. This study aims to identify leads for the causal effects of these mushroom components on cell differentiation and death. Methods THP-1 cells were treated with different polysaccharide extracts of mushrooms and controls. Morphological effects were observed by light microscopy. Flow cytometry was applied to follow the cell differentiation by cell cycle shifts after staining with propidium iodide, changes of mitochondrial membrane potential after incubation with JC-1, and occurrence of intracellular reactive oxygen species after incubation with hydroethidine. Principal component analysis of the data was performed to evaluate the cellular effects of the different treatments. Results P. linteus polysaccharide extracts induced dose-dependent apoptosis of THP-1 cells within 24 h, while A. bisporus and A. brasiliensis polysaccharide extracts caused differentiation into macrophages. A pure P. linteus polysaccharide had no effect. Apoptosis was inhibited by preincubating THP-1 cells with human serum. The principal component analysis revealed that P. linteus, A. bisporus and A. brasiliensis polysaccharide extracts increased reactive oxygen species production. Both A. bisporus and A. brasiliensis polysaccharide extracts decreased the mitochondrial membrane potential, while this was increased by P. linteus polysaccharide extracts. Conclusions P. linteus polysaccharide extracts caused apoptosis of THP-1 monocytes while A. bisporus and A. brasiliensis polysaccharide extracts caused these cells to differentiate into macrophages. The protective effects of human serum suggested that P. linteus polysaccharide extract induced apoptosis by extrinsic pathway, i.e. by binding to the TRAIL receptor. The mitochondrial membrane potential together with reactive oxygen species seems to play an important role in cell differentiation and cell death.
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Affiliation(s)
- Leo Jld van Griensven
- Department of Bioscience, Plant Research International, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6700AA, The Netherlands.
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Abstract
Cellular FLICE (FADD-like IL-1beta-converting enzyme)-inhibitory protein (c-FLIP) is a major resistance factor and critical anti-apoptotic regulator that inhibits tumor necrosis factor-alpha (TNF-alpha), Fas-L, and TNF-related apoptosis-inducing ligand (TRAIL)-induced apoptosis as well as chemotherapy-triggered apoptosis in malignant cells. c-FLIP is expressed as long (c-FLIP(L)), short (c-FLIP(S)), and c-FLIP(R) splice variants in human cells. c-FLIP binds to FADD and/or caspase-8 or -10 in a ligand-dependent and-independent fashion, which in turn prevents death-inducing signaling complex (DISC) formation and subsequent activation of the caspase cascade. Moreover, c-FLIP(L) and c-FLIP(S) are known to have multifunctional roles in various signaling pathways, as well as activating and/or upregulating several cytoprotective signaling molecules. Upregulation of c-FLIP has been found in various tumor types, and its downregulation has been shown to restore apoptosis triggered by cytokines and various chemotherapeutic agents. Hence, c-FLIP is an important target for cancer therapy. For example, small interfering RNAs (siRNAs) that specifically knockdown the expression of c-FLIP(L) in diverse human cancer cell lines augmented TRAIL-induced DISC recruitment and increased the efficacy of chemotherapeutic agents, thereby enhancing effector caspase stimulation and apoptosis. Moreover, small molecules causing degradation of c-FLIP as well as decreasing mRNA and protein levels of c-FLIP(L) and c-FLIP(S) splice variants have been found, and efforts are underway to develop other c-FLIP-targeted cancer therapies. This review focuses on (1) the functional role of c-FLIP splice variants in preventing apoptosis and inducing cytokine and drug resistance; (2) the molecular mechanisms that regulate c-FLIP expression; and (3) strategies to inhibit c-FLIP expression and function.
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Ku70 acetylation and modulation of c-Myc/ATF4/CHOP signaling axis by SIRT1 inhibition lead to sensitization of HepG2 cells to TRAIL through induction of DR5 and down-regulation of c-FLIP. Int J Biochem Cell Biol 2013; 45:711-23. [DOI: 10.1016/j.biocel.2012.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 12/01/2012] [Accepted: 12/03/2012] [Indexed: 01/03/2023]
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Lamas B, Goncalves-Mendes N, Nachat-Kappes R, Rossary A, Caldefie-Chezet F, Vasson MP, Farges MC. Leptin modulates dose-dependently the metabolic and cytolytic activities of NK-92 cells. J Cell Physiol 2013; 228:1202-9. [DOI: 10.1002/jcp.24273] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 10/19/2012] [Indexed: 11/07/2022]
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Abstract
Cellular FLICE (FADD-like IL-1β-converting enzyme)-inhibitory protein (c-FLIP) is a major antiapoptotic protein and an important cytokine and chemotherapy resistance factor that suppresses cytokine- and chemotherapy-induced apoptosis. c-FLIP is expressed as long (c-FLIPL), short (c-FLIPS), and c-FLIPR splice variants in human cells. c-FLIP binds to FADD and/or caspase-8 or -10 and TRAIL receptor 5 (DR5). This interaction in turn prevents Death-Inducing Signaling Complex (DISC) formation and subsequent activation of the caspase cascade. c-FLIPL and c-FLIPS are also known to have multifunctional roles in various signaling pathways, as well as activating and/or upregulating several cytoprotective and pro-survival signaling proteins including Akt, ERK, and NF-κB. In addition to its role in apoptosis, c-FLIP is involved in programmed necroptosis (necrosis) and autophagy. Necroptosis is regulated by the Ripoptosome, which is a signaling intracellular cell death platform complex. The Ripoptosome contains receptor-interacting protein-1/Receptor-Interacting Protein-3 (RIP1), caspase-8, caspase-10, FADD, and c-FLIP isoforms involved in switching apoptotic and necroptotic cell death. c-FLIP regulates the Ripoptosome; in addition to its role in apoptosis, it is therefore also involved in necrosis. c-FLIPL attenuates autophagy by direct acting on the autophagy machinery by competing with Atg3 binding to LC3, thereby decreasing LC3 processing and inhibiting autophagosome formation. Upregulation of c-FLIP has been found in various tumor types, and its silencing has been shown to restore apoptosis triggered by cytokines and various chemotherapeutic agents. Hence, c-FLIP is an important target for cancer therapy. This review focuses on (1) the anti-apoptotic role of c-FLIP splice variants in preventing apoptosis and inducing cytokine and chemotherapy drug resistance, as well as its roles in necrosis and autophagy, and (2) modulation of c-FLIP expression as a means to enhance apoptosis and modulate necrosis and autophagy in cancer cells.
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Affiliation(s)
- Ahmad R Safa
- Department of Pharmacology & Toxicology, Indiana University School of Medicine, IN 46202, USA ; Indiana University Simon Cancer Center, Indiana University School of Medicine, IN 46202, USA
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Qiu G, Jiang J, Liu XS. Pentamidine sensitizes chronic myelogenous leukemia K562 cells to TRAIL-induced apoptosis. Leuk Res 2012; 36:1417-21. [PMID: 22938941 DOI: 10.1016/j.leukres.2012.07.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 06/11/2012] [Accepted: 07/28/2012] [Indexed: 02/05/2023]
Abstract
Pentamidine (PMD) is an anti-protozoa drug with potential anticancer activity. Here we show that PMD at clinically achievable plasma drug concentrations slightly inhibited the growth of human leukemia cell lines. PMD close to its therapeutic doses sensitized TRAIL-resistant K562 cells to the cytokine and potentiated TRAIL-induced apoptosis through activation of caspase-8 and -3. When we investigated the underlying mechanism, we observed that treatment with PMD increased DR5 expression at both mRNA and protein levels and down-regulated anti-apoptotic XIAP and Mcl-1 protein levels. This study provides a rationale for a more in-depth exploration into the combined treatment with PMD and TRAIL as a valuable strategy for leukemia therapy.
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Affiliation(s)
- Geng Qiu
- Department of Biochemistry, Shantou University Medical College, Shantou, Guangdong, China
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Ryu BJ, Hwang MK, Park M, Lee K, Kim SH. Thiourea compound AW00178 sensitizes human H1299 lung carcinoma cells to TRAIL-mediated apoptosis. Bioorg Med Chem Lett 2012; 22:3862-5. [PMID: 22622069 DOI: 10.1016/j.bmcl.2012.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 03/30/2012] [Accepted: 05/05/2012] [Indexed: 10/28/2022]
Abstract
The tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) triggers apoptosis in a wide variety of cancer cells. Recently, cancer cell resistance to TRAIL-mediated apoptosis has become a challenging issue in the development of TRAIL-based anti-cancer therapies. In this study, we found that 1-(5-chloro-2-methyl-phenyl)-3-[4-(5-trifluoromethyl-pyrazol-1-yl)-phenyl]-thiourea (AW00178) was able to sensitize TRAIL-resistant human lung cancer H1299 cells to TRAIL-mediated apoptosis. Treatment with AW00178, either alone or in combination with TRAIL, induced the expression of CHOP, a protein related to TRAIL sensitivity, and reduced the expression of survivin, an anti-apoptotic protein involved in TRAIL resistance. Additionally, AW00178, alone or in combination with TRAIL, induced the activation of c-Jun and inactivation of Akt. A pharmacologic inhibition study revealed that c-Jun activation and Akt inactivation were strongly related to CHOP induction and survivin down-regulation, respectively. In summary, these results suggested that AW00178 mediated sensitization to TRAIL-mediated apoptosis in H1299 cells by increasing sensitivity and decreasing resistance to TRAIL via the induction of c-Jun-dependent CHOP expression and the reduction of Akt-dependent survivin expression, respectively.
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Affiliation(s)
- Byung Jun Ryu
- Laboratory of Chemical Genomics, Pharmacology Research Center, Korea Research Institute of Chemical Technology, PO Box 107, Yuseong-gu, Daejeon 305-600, Republic of Korea
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Sun J, McKallip RJ. Plumbagin treatment leads to apoptosis in human K562 leukemia cells through increased ROS and elevated TRAIL receptor expression. Leuk Res 2011; 35:1402-8. [PMID: 21741707 DOI: 10.1016/j.leukres.2011.06.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 06/10/2011] [Accepted: 06/14/2011] [Indexed: 11/16/2022]
Abstract
This study examined the ability of plumbagin to induce apoptosis in chronic myelogenous leukemia (CML). Plumbagin exposure led to a significant reduction in cell viability and the induction of apoptosis. Mechanistically, plumbagin treatment led to elevated levels of ROS. Plumbagin-induced apoptosis was inhibited by N-acetyl L-cysteine (NAC) and PEG-catalase. Furthermore, plumbagin exposure led to elevated expression of DR4 and DR5 and increased killing through soluble TRAIL. The plumbagin-induced increase in DR4 and DR5 was inhibited by treatment with NAC. Together, this study suggests that plumbagin may be an effective treatment of CML through increased sensitivity to TRAIL-mediated killing.
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Affiliation(s)
- Jingping Sun
- Division of Basic Medical Sciences, Mercer University School of Medicine, 1550 College St., Macon, GA 31207, USA
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Farooqi AA, Waseem S, Ashraf MS, Iqbal MJ, Bhatti S. TRAIL and guardian angel of genome integrity: ATM boards TRAIL blazer. J Cancer Res Clin Oncol 2011; 137:1283-7. [PMID: 21706325 DOI: 10.1007/s00432-011-0996-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 06/09/2011] [Indexed: 10/18/2022]
Abstract
Prostate cancer is a multifaceted progressive multistep disorder that arises because of accumulation of genetic and epigenetic abnormalities, which escort to the transformation of normal cells into malignant derivatives. Despite tremendous strides have been made in the understanding of prostate cancer biology, yet approaches towards cancer-targeted therapy still face confrontations in standardization. This review brings to attention, the regulators in complex genetic backgrounds to enlighten our understanding of transformation and metastasis in human systems. Recent evidence gives a clue that prostate cancer may be linked to deregulated DNA damage repair processes, as various combinations of targeted deletions in genes controlling cell-cycle checkpoints; apoptosis and DNA repair result in prostate cancer progression and aggressiveness. An insight of the orchestration between DNA damage-based molecular responses and TRAIL provides an understanding of the mechanisms that cause apoptosis and may provide rationale for the development of novel therapeutic strategies.
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Affiliation(s)
- Ammad Ahmad Farooqi
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Lahore, Pakistan.
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Lion E, Anguille S, Berneman ZN, Smits ELJM, Van Tendeloo VFI. Poly(I:C) enhances the susceptibility of leukemic cells to NK cell cytotoxicity and phagocytosis by DC. PLoS One 2011; 6:e20952. [PMID: 21698118 PMCID: PMC3117863 DOI: 10.1371/journal.pone.0020952] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Accepted: 05/13/2011] [Indexed: 12/20/2022] Open
Abstract
α Active specific immunotherapy aims at stimulating the host's immune system to recognize and eradicate malignant cells. The concomitant activation of dendritic cells (DC) and natural killer (NK) cells is an attractive modality for immune-based therapies. Inducing immunogenic cell death to facilitate tumor cell recognition and phagocytosis by neighbouring immune cells is of utmost importance for guiding the outcome of the immune response. We previously reported that acute myeloid leukemic (AML) cells in response to electroporation with the synthetic dsRNA analogue poly(I:C) exert improved immunogenicity, demonstrated by enhanced DC-activating and NK cell interferon-γ-inducing capacities. To further invigorate the potential of these immunogenic tumor cells, we explored their effect on the phagocytic and cytotoxic capacity of DC and NK cells, respectively. Using single-cell analysis, we assessed these functionalities in two- and three-party cocultures. Following poly(I:C) electroporation AML cells become highly susceptible to NK cell-mediated killing and phagocytosis by DC. Moreover, the enhanced killing and the improved uptake are strongly correlated. Interestingly, tumor cell killing, but not phagocytosis, is further enhanced in three-party cocultures provided that these tumor cells were upfront electroporated with poly(I:C). Altogether, poly(I:C)-electroporated AML cells potently activate DC and NK cell functions and stimulate NK-DC cross-talk in terms of tumor cell killing. These data strongly support the use of poly(I:C) as a cancer vaccine component, providing a way to overcome immune evasion by leukemic cells.
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Affiliation(s)
- Eva Lion
- Vaccine & Infectious Disease Institute (Vaxinfectio), Laboratory of Experimental Hematology, Faculty of Medicine, University of Antwerp, Antwerp, Belgium.
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Xu J, Zhou JY, Wei WZ, Wu GS. Activation of the Akt survival pathway contributes to TRAIL resistance in cancer cells. PLoS One 2010; 5:e10226. [PMID: 20419107 PMCID: PMC2856686 DOI: 10.1371/journal.pone.0010226] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Accepted: 03/19/2010] [Indexed: 12/24/2022] Open
Abstract
The mechanism of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) resistance in cancer cells is not fully understood. Here, we show that the Akt survival pathway plays an important role in TRAIL resistance in human cancer cells. Specifically, we found that TRAIL treatment activates the Akt survival pathway and that inhibition of this pathway by the PI3K inhibitor LY294002 or knockdown of Akt sensitizes resistant cancer cells to TRAIL. Since Akt is negatively regulated by the tumor suppressor PTEN, we examined the TRAIL sensitivity in PTEN knockdown mouse prostate epithelial cells and found that PTEN(-/-) cells are more resistant than PTEN(+/+) cells while the sensitivity of PTEN(+/-) cells fell in between. Further, we showed that overexpression of a mutant PTEN confers TRAIL resistance in PTEN(+/+) cells, supporting a role of PTEN in TRAIL sensitivity. In TRAIL resistant breast T47D cells, overexpression of the mutant PTEN further increased their resistance to TRAIL. Taken together, our data indicate that inactivation of functional PTEN and the consequent activation of the Akt pathway prevents TRAIL-induced apoptosis, leading to TRAIL resistance. Therefore, our results suggest that TRAIL resistance can be overcome by targeting PTEN or the Akt survival pathway in cancer cells.
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Affiliation(s)
- Jing Xu
- Program in Molecular Biology & Genetics, Karmanos Cancer Institute, Department of Pathology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Jun-Ying Zhou
- Program in Molecular Biology & Genetics, Karmanos Cancer Institute, Department of Pathology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Wei-Zen Wei
- Program in Breast Cancer, Karmanos Cancer Institute, Department of Immunology and Microbiology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Gen Sheng Wu
- Program in Molecular Biology & Genetics, Karmanos Cancer Institute, Department of Pathology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
- * E-mail:
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Lokeshwar VB, Lopez LE, Munoz D, Chi A, Shirodkar SP, Lokeshwar SD, Escudero DO, Dhir N, Altman N. Antitumor activity of hyaluronic acid synthesis inhibitor 4-methylumbelliferone in prostate cancer cells. Cancer Res 2010; 70:2613-23. [PMID: 20332231 DOI: 10.1158/0008-5472.can-09-3185] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
4-Methylumbelliferone (4-MU) is a hyaluronic acid (HA) synthesis inhibitor with anticancer properties; the mechanism of its anticancer effects is unknown. We evaluated the effects of 4-MU on prostate cancer cells. 4-MU inhibited proliferation, motility, and invasion of DU145, PC3-ML, LNCaP, C4-2B, and/or LAPC-4 cells. At IC(50) for HA synthesis (0.4 mmol/L), 4-MU induced >3-fold apoptosis in prostate cancer cells, which could be prevented by the addition of HA. 4-MU induced caspase-8, caspase-9, and caspase-3 activation, PARP cleavage, upregulation of Fas-L, Fas, FADD and DR4, and downregulation of bcl-2, phosphorylated bad, bcl-XL, phosphorylated Akt, phosphorylated IKB, phosphorylated ErbB2, and phosphorylated epidermal growth factor receptor. At IC(50), 4-MU also caused >90% inhibition of NF-kappaB reporter activity, which was prevented partially by the addition of HA. With the exception of caveolin-1, HA reversed the 4-MU-induced downregulation of HA receptors (CD44 and RHAMM), matrix-degrading enzymes (MMP-2 and MMP-9), interleukin-8, and chemokine receptors (CXCR1, CXCR4, and CXCR7) at the protein and mRNA levels. Expression of myristoylated-Akt rescued 4-MU-induced apoptosis and inhibition of cell growth and interleukin-8, RHAMM, HAS2, CD44, and MMP-9 expression. Oral administration of 4-MU significantly decreased PC3-ML tumor growth (>3-fold) when treatment was started either on the day of tumor cell injection or after the tumors became palpable, without organ toxicity, changes in serum chemistry, or body weight. Tumors from 4-MU-treated animals showed reduced microvessel density ( approximately 3-fold) and HA expression but increased terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling-positive cells and expression of apoptosis-related molecules. Therefore, the anticancer effects of 4-MU, an orally bioavailable and relatively nontoxic agent, are primarily mediated by inhibition of HA signaling.
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Affiliation(s)
- Vinata B Lokeshwar
- Division of Urology Research, Department of Urology (M-800), University of Miami Miller School of Medicine, P.O. Box 016960, Miami, FL 33101, USA.
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