1
|
El Yousfi Y, Mora-Molina R, López-Rivas A, Yerbes R. Role of the YAP/TAZ-TEAD Transcriptional Complex in the Metabolic Control of TRAIL Sensitivity by the Mevalonate Pathway in Cancer Cells. Cells 2023; 12:2370. [PMID: 37830584 PMCID: PMC10571597 DOI: 10.3390/cells12192370] [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: 08/31/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023] Open
Abstract
Different studies have reported that inhibiting the mevalonate pathway with statins may increase the sensitivity of cancer cells to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), although the signaling mechanism leading to this sensitization remains largely unknown. We investigated the role of the YAP (Yes-associated protein)/TAZ (transcriptional co-activator with PDZ-binding motif)-TEAD (TEA/ATTS domain) transcriptional complex in the metabolic control of TRAIL sensitivity by the mevalonate pathway. We show that depleting nuclear YAP/TAZ in tumor cells, either via treatment with statins or by silencing YAP/TAZ expression with siRNAs, facilitates the activation of apoptosis by TRAIL. Furthermore, the blockage of TEAD transcriptional activity either pharmacologically or through the ectopic expression of a disruptor of the YAP/TAZ interaction with TEAD transcription factors, overcomes the resistance of tumor cells to the induction of apoptosis by TRAIL. Our results show that the mevalonate pathway controls cellular the FLICE-inhibitory protein (cFLIP) expression in tumor cells. Importantly, inhibiting the YAP/TAZ-TEAD signaling pathway induces cFLIP down-regulation, leading to a marked sensitization of tumor cells to apoptosis induction by TRAIL. Our data suggest that a combined strategy of targeting TEAD activity and selectively activating apoptosis signaling by agonists of apoptotic TRAIL receptors could be explored as a potential therapeutic approach in cancer treatment.
Collapse
Affiliation(s)
- Younes El Yousfi
- Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, CSIC-Universidad de Sevilla-Universidad Pablo de Olavide, 41092 Seville, Spain; (Y.E.Y.); (R.M.-M.); (A.L.-R.)
| | - Rocío Mora-Molina
- Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, CSIC-Universidad de Sevilla-Universidad Pablo de Olavide, 41092 Seville, Spain; (Y.E.Y.); (R.M.-M.); (A.L.-R.)
| | - Abelardo López-Rivas
- Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, CSIC-Universidad de Sevilla-Universidad Pablo de Olavide, 41092 Seville, Spain; (Y.E.Y.); (R.M.-M.); (A.L.-R.)
| | - Rosario Yerbes
- Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, CSIC-Universidad de Sevilla-Universidad Pablo de Olavide, 41092 Seville, Spain; (Y.E.Y.); (R.M.-M.); (A.L.-R.)
- Medical Physiology and Biophysics Department, Universidad de Sevilla and Instituto de Biomedicina de Sevilla (IBiS) (Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla), 41013 Seville, Spain
| |
Collapse
|
2
|
Lomovskaya YV, Kobyakova MI, Senotov AS, Fadeeva IS, Lomovsky AI, Krasnov KS, Shtatnova DY, Akatov VS, Fadeev RS. Myeloid Differentiation Increases Resistance of Leukemic Cells to TRAIL-Induced Death by Reducing the Expression of DR4 and DR5 Receptors. BIOCHEMISTRY (MOSCOW), SUPPLEMENT SERIES A: MEMBRANE AND CELL BIOLOGY 2023. [DOI: 10.1134/s1990747822060101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
|
3
|
Potential Cytoprotective and Regulatory Effects of Ergothioneine on Gene Expression of Proteins Involved in Erythroid Adaptation Mechanisms and Redox Pathways in K562 Cells. Genes (Basel) 2022; 13:genes13122368. [PMID: 36553634 PMCID: PMC9778224 DOI: 10.3390/genes13122368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/08/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
This study aimed to establish the importance of ergothioneine (ERT) in the erythroid adaptation mechanisms by appraising the expression levels of redox-related genes associated with the PI3K/AKT/FoxO3 and Nrf2-ARE pathways using K562 cells induced to erythroid differentiation and H2O2-oxidative stress. Cell viability and gene expression were evaluated. Two concentrations of ERT were assessed, 1 nM (C1) and 100 µM (C2), with and without stress induction (100 µM H2O2). Assessments were made in three periods of the cellular differentiation process (D0, D2, and D4). The C1 treatment promoted the induction of FOXO3 (D0 and 2), PSMB5, and 6 expressions (D4); C1 + H2O2 treatment showed the highest levels of NRF2 transcripts, KEAP1 (D0), YWHAQ (D2 and 4), PSMB5 (D2) and PSMB6 (D4); and C2 + H2O2 (D2) an increase in FOXO3 and MST1 expression, with a decrease of YWHAQ and NRF2 was observed. in C2 + H2O2 (D2) an increase in FOXO3 and MST1, with a decrease in YWHAQ and NRF2 was observed All ERT treatments increased gamma-globin expression. Statistical multivariate analyzes highlighted that the Nrf2-ARE pathway presented a greater contribution in the production of PRDX1, SOD1, CAT, and PSBM5 mRNAs, whereas the PI3K/AKT/FoxO3 pathway was associated with the PRDX2 and TRX transcripts. In conclusion, ERT presented a cytoprotective action through Nrf2 and FoxO3, with the latter seeming to contribute to erythroid proliferation/differentiation.
Collapse
|
4
|
Leonaviciene G, Mazutis L. RNA cytometry of single-cells using semi-permeable microcapsules. Nucleic Acids Res 2022; 51:e2. [PMID: 36268865 PMCID: PMC9841424 DOI: 10.1093/nar/gkac918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/23/2022] [Accepted: 10/07/2022] [Indexed: 01/29/2023] Open
Abstract
Analytical tools for gene expression profiling of individual cells are critical for studying complex biological systems. However, the techniques enabling rapid measurements of gene expression on thousands of single-cells are lacking. Here, we report a high-throughput RNA cytometry for digital profiling of single-cells isolated in liquid droplets enveloped by a thin semi-permeable membrane (microcapsules). Due to the selective permeability of the membrane, the desirable enzymes and reagents can be loaded, or replaced, in the microcapsule at any given step by simply changing the reaction buffer in which the microcapsules are dispersed. Therefore, complex molecular biology workflows can be readily adapted to conduct nucleic acid analysis on encapsulated mammalian cells, or other biological species. The microcapsules support sequential multi-step enzymatic reactions and remain intact under different biochemical conditions, freezing, thawing, and thermocycling. Combining microcapsules with conventional FACS provides a high-throughput approach for conducting RNA cytometry of individual cells based on their digital gene expression signature.
Collapse
Affiliation(s)
- Greta Leonaviciene
- Institute of Biotechnology, Life Sciences Centre, Vilnius University, 7 Sauletekio av., Vilnius, LT-10257, Lithuania
| | - Linas Mazutis
- To whom correspondence should be addressed. Tel: +370 5 2234356;
| |
Collapse
|
5
|
Zhu J, Yeo JH, Bowyer AA, Proschogo N, New EJ. Studies of the labile lead pool using a rhodamine-based fluorescent probe. Metallomics 2021; 12:644-648. [PMID: 32342963 DOI: 10.1039/d0mt00056f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lead is a heavy metal which has long been known to have toxic effects on the body. However, much remains to be learnt about the labile lead pool and cellular uptake of lead. We report here RPb1 that undergoes a 100-fold increase in fluorescence emission in the presence of Pb2+, and which can be applied to study the labile lead pool within cells. We demonstrate the capacity of RPb1 for investigating labile lead pool in DLD-1 cells and changes in labile lead during differentiation of K562 cells.
Collapse
Affiliation(s)
- Jianping Zhu
- University of Sydney, School of Chemistry, Sydney, NSW 2006, Australia.
| | | | | | | | | |
Collapse
|
6
|
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.
Collapse
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
| |
Collapse
|
7
|
Singh AK, Awasthi D, Dubey M, Nagarkoti S, Chandra T, Barthwal MK, Tripathi AK, Dikshit M. Expression of inducible NOS is indispensable for the antiproliferative and proapoptotic effect of imatinib in BCR-ABL positive cells. J Leukoc Biol 2021; 110:853-866. [PMID: 33527482 DOI: 10.1002/jlb.1a0820-514r] [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: 08/21/2020] [Revised: 12/14/2020] [Accepted: 01/13/2021] [Indexed: 01/07/2023] Open
Abstract
Chronic myeloid leukemia (CML) is characterized by constitutive BCR-ABL kinase activity, an aggressive proliferation of immature cells, and reduced differentiation. Targeting tyrosine kinase activity of BCR-ABL with imatinib is an effective therapy for the newly diagnosed CML patients; however, 20%-30% of the patients initially treated with imatinib eventually experience treatment failure. Therefore, early identification of these patients is of high clinical relevance. In the present study, we by undertaking a direct comparison of inducible NOS (iNOS) status in neutrophils from healthy volunteers, newly diagnosed, imatinib responder, and resistant CML patients as well as by conducting in vitro studies in K562 cells demonstrated that inhibition of BCR-ABL by imatinib or siRNA significantly enhanced NO generation and iNOS expression. Indeed, patients exhibiting treatment failure or imatinib resistance were less likely to induce NO generation/iNOS expression. Our findings further demonstrated that imatinib mediated antiproliferative and proapoptotic effect in BCR-ABL+ cells associated with enhanced iNOS expression, and it was significantly prevented in the presence of L-NAME, 1400W, or iNOS siRNA. Overexpression of iNOS in K562 cells expectedly enhanced imatinib sensitivity on cytostasis and apoptosis, even at lower concentration (0.1 μM) of imatinib. Mechanistically, imatinib or BCR-ABL siRNA following deglutathionylation of NF-κB, enhanced its binding to iNOS promoter and induced iNOS transcription. Deglutathionylation of procaspase-3 however associated with increased caspase-3 activity and cell apoptosis. Taken together, results obtained suggest that monitoring NO/iNOS level could be useful to identify patients likely to be responsive or resistant to imatinib and can be used to personalized alternative therapy.
Collapse
Affiliation(s)
| | - Deepika Awasthi
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Megha Dubey
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Sheela Nagarkoti
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Tulika Chandra
- Department of Transfusion Medicine, King George's Medical University, Lucknow, India
| | | | - Anil Kumar Tripathi
- Department of Clinical Hematology, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, India
| | - Madhu Dikshit
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| |
Collapse
|
8
|
An induced pluripotent stem cell model of Fanconi anemia reveals mechanisms of p53-driven progenitor cell differentiation. Blood Adv 2020; 4:4679-4692. [PMID: 33002135 DOI: 10.1182/bloodadvances.2020001593] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 08/26/2020] [Indexed: 12/17/2022] Open
Abstract
Fanconi anemia (FA) is a disorder of DNA repair that manifests as bone marrow (BM) failure. The lack of accurate murine models of FA has refocused efforts toward differentiation of patient-derived induced pluripotent stem cells (IPSCs) to hematopoietic progenitor cells (HPCs). However, an intact FA DNA repair pathway is required for efficient IPSC derivation, hindering these efforts. To overcome this barrier, we used inducible complementation of FANCA-deficient IPSCs, which permitted robust maintenance of IPSCs. Modulation of FANCA during directed differentiation to HPCs enabled the production of FANCA-deficient human HPCs that recapitulated FA genotoxicity and hematopoietic phenotypes relative to isogenic FANCA-expressing HPCs. FANCA-deficient human HPCs underwent accelerated terminal differentiation driven by activation of p53/p21. We identified growth arrest specific 6 (GAS6) as a novel target of activated p53 in FANCA-deficient HPCs and modulate GAS6 signaling to rescue hematopoiesis in FANCA-deficient cells. This study validates our strategy to derive a sustainable, highly faithful human model of FA, uncovers a mechanism of HPC exhaustion in FA, and advances toward future cell therapy in FA.
Collapse
|
9
|
Andersen CJ, Dupree L, Murray K, Ragonesi N, McMullen K, Cintrón-Rivera L, Doerr A. Low-Density Lipoproteins, High-Density Lipoproteins (HDL), and HDL-Associated Proteins Differentially Modulate Chronic Myelogenous Leukemia Cell Viability. Lipids 2020; 55:615-626. [PMID: 32558932 DOI: 10.1002/lipd.12254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 04/17/2020] [Accepted: 05/05/2020] [Indexed: 12/20/2022]
Abstract
Cellular lipid metabolism, lipoprotein interactions, and liver X receptor (LXR) activation have been implicated in the pathophysiology and treatment of cancer, although findings vary across cancer models and by lipoprotein profiles. In this study, we investigated the effects of human-derived low-density lipoproteins (LDL), high-density lipoproteins (HDL), and HDL-associated proteins apolipoprotein A1 (apoA1) and serum amyloid A (SAA) on markers of viability, cholesterol flux, and differentiation in K562 cells-a bone marrow-derived, stem-like erythroleukemia cell model of chronic myelogenous leukemia (CML). We further evaluated whether lipoprotein-mediated effects were altered by concomitant LXR activation. We observed that LDL promoted higher K562 cell viability in a dose- and time-dependent manner and increased cellular cholesterol concentrations, while LXR activation by the agonist TO901317 ablated these effects. LXR activation in the presence of HDL, apoA1 and SAA-rich HDL suppressed K562 cell viability, while robustly inducing mRNA expression of ATP-binding cassette transporter A1 (ABCA1). HDL and its associated proteins additionally suppressed mRNA expression of anti-apoptotic B-cell lymphoma-extra large (BCL-xL), and the erythroid lineage marker 5'-aminolevulinate synthase 2 (ALAS2), while SAA-rich HDL induced mRNA expression of the megakaryocytic lineage marker integrin subunit alpha 2b (ITGA2B). Together, these findings suggest that lipoproteins and LXR may impact the viability and characteristics of CML cells.
Collapse
Affiliation(s)
| | - Lydia Dupree
- Department of Biology, Fairfield University, Fairfield, CT, 06824, USA
| | - Kristina Murray
- Department of Biology, Fairfield University, Fairfield, CT, 06824, USA
| | - Nicholas Ragonesi
- Department of Biology, Fairfield University, Fairfield, CT, 06824, USA
| | - Kaley McMullen
- Department of Biology, Fairfield University, Fairfield, CT, 06824, USA
| | | | - Adam Doerr
- Department of Biology, Fairfield University, Fairfield, CT, 06824, USA
| |
Collapse
|
10
|
Desales-Salazar E, Khusro A, Cipriano-Salazar M, Barbabosa-Pliego A, Rivas-Caceres RR. Scorpion venoms and associated toxins as anticancer agents: update on their application and mechanism of action. J Appl Toxicol 2020; 40:1310-1324. [PMID: 32249452 DOI: 10.1002/jat.3976] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/01/2020] [Accepted: 03/05/2020] [Indexed: 12/29/2022]
Abstract
Cancer remains one of the deadliest non-infectious diseases of the 21st century, causing millions of mortalities per year worldwide. Analyses of conventional treatments, such as radiotherapy and chemotherapy, have shown not only a lower therapeutic efficiency rate but also plethora of side-effects. Considering the desperate need to identify promising anticancer agents, researchers are in quest to design and develop new tumoricidal drugs from natural sources. Over the past few years, scorpion venoms have shown exemplary roles as pivotal anticancer agents. Scorpion venoms associated metabolites, particularly toxins demonstrated in vitro anticancer attributes against diversified cell lines by inhibiting the growth and progression of the cell cycle, inhibiting metastasis by blocking ion channels such as K+ and Cl- , and/or inducing apoptosis by intrinsic and extrinsic pathways. This review sheds light not only on in vitro anticancer properties of distinct scorpion venoms and their toxins, but also on their mechanism of action for designing and developing new therapeutic drugs in future.
Collapse
Affiliation(s)
- Erasto Desales-Salazar
- Centro de Investigación y Estudios Avanzados en Salud Animal (CIESA), Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México (UAEM), Toluca, Mexico
| | - Ameer Khusro
- Research Department of Plant Biology and Biotechnology, Loyola College, Nungambakkam, Chennai, Tamil Nadu, India
| | - Moisés Cipriano-Salazar
- Unidad Académica de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Guerrero, Guerrero, Mexico
| | - Alberto Barbabosa-Pliego
- Centro de Investigación y Estudios Avanzados en Salud Animal (CIESA), Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México (UAEM), Toluca, Mexico
| | | |
Collapse
|
11
|
Uddin MH, Pimentel JM, Chatterjee M, Allen JE, Zhuang Z, Wu GS. Targeting PP2A inhibits the growth of triple-negative breast cancer cells. Cell Cycle 2020; 19:592-600. [PMID: 32011210 DOI: 10.1080/15384101.2020.1723195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Triple-negative breast cancer (TNBC) does not respond to widely used targeted/endocrine therapies because of the absence of progesterone and estrogen receptors and HER2 amplification. It has been shown that the majority of TNBC cells are highly sensitive to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis, but the development of TRAIL resistance limits its efficacy. We previously found that protein phosphatase 2A (PP2A) plays an important role in TRAIL resistance. In this study, we evaluated the effects of PP2A inhibition on cell death in TRAIL-resistant TNBC cells. We found that the PP2A inhibitor LB-100 effectively inhibits the growth of a panel of TNBC cell lines including lines that are intrinsically resistant to TRAIL. Using two TRAIL-resistant cell lines generated from TRAIL-sensitive parental cells (MDA231 and SUM159), we found that both TRAIL-sensitive and -resistant cell lines are equally sensitive to LB-100. We also found that LB-100 sensitizes TNBC cells to clinically used chemotherapeutical agents, including paclitaxel and cisplatin. Importantly, we found that LB-100 effectively inhibits the growth of MDA468 tumors in mice in vivo without apparent toxicity. Collectively, these data suggest that pharmacological inhibition of PP2A activity could be a novel therapeutic strategy for treating patients with TNBC in a clinical setting.
Collapse
Affiliation(s)
- Mohammed Hafiz Uddin
- Department of Oncology and Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Julio M Pimentel
- Department of Oncology and Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA.,Cancer Biology Program, Wayne State University School of Medicine, Detroit, MI, USA
| | - Madhumita Chatterjee
- Department of Oncology and Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Joshu E Allen
- Department of Research and Development, Oncoceutics, Inc, Philadelphia, PA, USA
| | - Zhengping Zhuang
- Neuro-Oncology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Gen Sheng Wu
- Department of Oncology and Pathology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA.,Cancer Biology Program, Wayne State University School of Medicine, Detroit, MI, USA
| |
Collapse
|
12
|
Sadaf S, Awasthi D, Singh AK, Nagarkoti S, Kumar S, Barthwal MK, Dikshit M. Pyroptotic and apoptotic cell death in iNOS and nNOS overexpressing K562 cells: A mechanistic insight. Biochem Pharmacol 2019; 176:113779. [PMID: 31881190 DOI: 10.1016/j.bcp.2019.113779] [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: 10/26/2019] [Accepted: 12/23/2019] [Indexed: 12/21/2022]
Abstract
Previous studies from this lab and others have demonstrated that nitric oxide (NO) in a concentration dependent manner, modulated neutrophil and leukemic cell survival. Subsequent studies delineated importance of iNOS in neutrophil differentiation and leukemic cell death. On the contrary, role of nNOS in survival of these cells remains least understood. Present study was therefore undertaken to assess and compare the role of iNOS and nNOS in the survival of NOS overexpressing myelocytic K562 cells. Cells with almost similar iNOS and nNOS activities displayed comparable cell cycle perturbation, Annexin V positivity, mitochondrial dysfunction, augmented DCF fluorescence, and also attenuated expression of antioxidants. Moreover, induction in cell death was also accompanied by the activation of pJNK/p38MAPK/Erk1/2 and reduction in PI3K/Akt/mTOR signaling. Treatment of NOS isoform overexpressing K562 cells with NAC, a potent free radical scavenger prevented cell death and also the modulations in the signaling proteins. In addition, enhanced expression of CASP1 and CASP4 genes, along with increased Caspase-1 cleavage and increased IL-1β release were significantly more in K562iNOS cells, which indicate priming of these cells for pyroptotic cell death. On the other hand, K562nNOS cells, displayed much enhanced CASP3 gene expression, Caspase-3 cleavage and Caspase-3 activity. Results obtained indicate that similar level of iNOS or nNOS activation in K562 cells, preferred pyroptotic and apoptotic cell death respectively.
Collapse
Affiliation(s)
- Samreen Sadaf
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Deepika Awasthi
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | | | - Sheela Nagarkoti
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Sachin Kumar
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | | | - Madhu Dikshit
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, India.
| |
Collapse
|
13
|
Pradier A, Papaserafeim M, Li N, Rietveld A, Kaestel C, Gruaz L, Vonarburg C, Spirig R, Puga Yung GL, Seebach JD. Small-Molecule Immunosuppressive Drugs and Therapeutic Immunoglobulins Differentially Inhibit NK Cell Effector Functions in vitro. Front Immunol 2019; 10:556. [PMID: 30972058 PMCID: PMC6445861 DOI: 10.3389/fimmu.2019.00556] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 03/01/2019] [Indexed: 12/14/2022] Open
Abstract
Small-molecule immunosuppressive drugs (ISD) prevent graft rejection mainly by inhibiting T lymphocytes. Therapeutic immunoglobulins (IVIg) are used for substitution, antibody-mediated rejection (AbMR) and HLA-sensitized recipients by targeting distinct cell types. Since the effect of ISD and IVIg on natural killer (NK) cells remains somewhat controversial in the current literature, the aim of this comparative study was to investigate healthy donor's human NK cell functions after exposure to ISD and IVIg, and to comprehensively review the current literature. NK cells were incubated overnight with IL2/IL12 and different doses and combinations of ISD and IVIg. Proliferation was evaluated by 3[H]-thymidine incorporation; phenotype, degranulation and interferon gamma (IFNγ) production by flow cytometry and ELISA; direct NK cytotoxicity by standard 51[Cr]-release and non-radioactive DELFIA assays using K562 as stimulator and target cells; porcine endothelial cells coated with human anti-pig antibodies were used as targets in antibody-dependent cellular cytotoxicity (ADCC) assays. We found that CD69, CD25, CD54, and NKG2D were downregulated by ISD. Proliferation was inhibited by methylprednisolone (MePRD), mycophenolic acid (MPA), and everolimus (EVE). MePRD and MPA reduced degranulation, MPA only of CD56bright NK cells. MePRD and IVIg inhibited direct cytotoxicity and ADCC. Combinations of ISD demonstrated cumulative inhibitory effects. IFNγ production was inhibited by MePRD and ISD combinations, but not by IVIg. In conclusion, IVIg, ISD and combinations thereof differentially inhibit NK cell functions. The most potent drug with an effect on all NK functions was MePRD. The fact that MePRD and IVIg significantly block NK cytotoxicity, especially ADCC, has major implications for AbMR as well as therapeutic strategies targeting cancer and immune cells with monoclonal antibodies.
Collapse
Affiliation(s)
- Amandine Pradier
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | - Maria Papaserafeim
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | - Ning Li
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | - Anke Rietveld
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | - Charlotte Kaestel
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | - Lyssia Gruaz
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | | | | | - Gisella L Puga Yung
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| | - Jörg D Seebach
- Division of Immunology and Allergy, University Hospitals and Medical Faculty, Geneva, Switzerland
| |
Collapse
|
14
|
Sadaf S, Singh AK, Awasthi D, Nagarkoti S, Agrahari AK, Srivastava RN, Jagavelu K, Kumar S, Barthwal MK, Dikshit M. Augmentation of iNOS expression in myeloid progenitor cells expedites neutrophil differentiation. J Leukoc Biol 2019; 106:397-412. [DOI: 10.1002/jlb.1a0918-349rr] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 01/28/2019] [Accepted: 02/07/2019] [Indexed: 12/18/2022] Open
Affiliation(s)
- Samreen Sadaf
- Pharmacology DivisionCSIR‐Central Drug Research Institute Lucknow India
| | | | - Deepika Awasthi
- Pharmacology DivisionCSIR‐Central Drug Research Institute Lucknow India
| | - Sheela Nagarkoti
- Pharmacology DivisionCSIR‐Central Drug Research Institute Lucknow India
| | | | | | | | - Sachin Kumar
- Pharmacology DivisionCSIR‐Central Drug Research Institute Lucknow India
| | | | - Madhu Dikshit
- Pharmacology DivisionCSIR‐Central Drug Research Institute Lucknow India
| |
Collapse
|
15
|
ONC201 activates ER stress to inhibit the growth of triple-negative breast cancer cells. Oncotarget 2017; 8:21626-21638. [PMID: 28423492 PMCID: PMC5400611 DOI: 10.18632/oncotarget.15451] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 01/24/2017] [Indexed: 12/21/2022] Open
Abstract
ONC201 was previously identified as a first-in-class antitumor agent and small-molecule inducer of the TRAIL (tumor necrosis factor-related apoptosis-inducing ligand) gene that induces apoptosis in cancer cells. ONC201 has a safety profile and is currently in phase II clinical trials for the treatment of various malignancies. In the current study, we examine the effect of ONC201 on triple-negative breast cancer cells (TNBC), a subtype of breast cancer that is sensitive to TRAIL. We find that ONC201 inhibits the growth of TNBC cells including TNBC cells that have developed acquired TRAIL resistance. However, TNBC cells that have developed acquired ONC201 resistance are cross-resistant to TRAIL. Mechanistically, ONC201 triggers an integrated stress response (ISR) involving the activation of the transcription factor ATF4. Knockdown of ATF4 impairs ONC201-induced apoptosis of TNBC cells. Importantly, the activation of ATF4 is compromised in ONC201-resistant TNBC cells. Thus, our results indicate that ONC201 induces an ISR to cause TNBC cell death and suggest that TNBC patients may benefit from ONC201-based therapies.
Collapse
|
16
|
Rapôso C. Scorpion and spider venoms in cancer treatment: state of the art, challenges, and perspectives. J Clin Transl Res 2017; 3:233-249. [PMID: 30873475 PMCID: PMC6410669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 03/01/2017] [Accepted: 05/17/2017] [Indexed: 11/12/2022] Open
Abstract
Background and Aim: Animal venoms comprise a mix of bioactive molecules with high affinity for multiple targets in cells and tissues. Scorpion and spider venoms and purified peptides exhibit significant effects on cancer cells, encompassing four potential mechanisms: 1) induction of cell cycle arrest, growth inhibition, and apoptosis; 2) inhibition of angiogenesis; 3) inhibition of invasion and metastasis; and 4) blocking of specific transmembrane channels. Tumor biology is complex and entails many intertwined processes, as reflected in the putative hallmarks of cancer. This complexity, however, gives rise to numerous (potential) pharmacological intervention sites. Molecules that target multiple proteins or pathways, such as components of animal venoms, may therefore be effective anti-cancer agents. The objective of this review was to address the anti-cancer properties and in vitro mechanisms of scorpion and spider venoms and toxins, and highlight current obstacles in translating the preclinical research to a clinical setting. Relevance for patients: Cancer is a considerable global contributor to disease-related death. Despite some advances being made, therapy remains palliative rather than curative for the majority of cancer indications. Consequently, more effective therapies need to be devised for poorly responding cancer types to optimize clinical cancer management. Scorpion and spider venoms may occupy a role in the development of improved anti-cancer modalities.
Collapse
Affiliation(s)
- Catarina Rapôso
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| |
Collapse
|
17
|
Dittmar F, Wolter S, Seifert R. Regulation of apoptosis by cyclic nucleotides in human erythroleukemia (HEL) cells and human myelogenous leukemia (K-562) cells. Biochem Pharmacol 2016; 112:13-23. [PMID: 27157412 DOI: 10.1016/j.bcp.2016.04.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 04/29/2016] [Indexed: 10/21/2022]
Abstract
The cyclic pyrimidine nucleotides cCMP and cUMP have been recently identified in numerous mammalian cell lines, in primary cells and in intact organs, but very little is still known about their biological function. A recent study of our group revealed that the membrane-permeable cCMP analog cCMP-acetoxymethylester (cCMP-AM) induces apoptosis in mouse lymphoma cells independent of protein kinase A via an intrinsic and mitochondria-dependent pathway. In our present study, we examined the effects of various cNMP-AMs in human tumor cell lines. In HEL cells, a human erythroleukemia cell line, cCMP-AM effectively reduced the number of viable cells, effectively induced apoptosis by altering the mitochondrial membrane potential and thereby caused changes in the cell cycle. cCMP itself was biologically inactive, indicating that membrane penetration is required to trigger intracellular effects. cCMP-AM did not induce apoptosis in K-562 cells, a human chronic myelogenous leukemia cell line, due to rapid export via multidrug resistance-associated proteins. The biological effects of cCMP-AM differed from those of other cNMP-AMs. In conclusion, cCMP effectively induces apoptosis in HEL cells, cCMP export prevents apoptosis of K-562 cells and cNMPs differentially regulate various aspects of apoptosis, cell growth and mitochondrial function. In a broader perspective, our data support the concept of distinct second messenger roles of cAMP, cGMP, cCMP and cUMP.
Collapse
Affiliation(s)
- Fanni Dittmar
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, D-30625 Hannover, Germany.
| | - Sabine Wolter
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, D-30625 Hannover, Germany.
| | - Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Str. 1, D-30625 Hannover, Germany.
| |
Collapse
|
18
|
Moreno-Nieves UY, Didier C, Lévy Y, Barré-Sinoussi F, Scott-Algara D. S100A9 Tetramers, Which are Ligands of CD85j, Increase the Ability of MVAHIV-Primed NK Cells to Control HIV Infection. Front Immunol 2015; 6:478. [PMID: 26441983 PMCID: PMC4585218 DOI: 10.3389/fimmu.2015.00478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 09/03/2015] [Indexed: 11/13/2022] Open
Abstract
Natural killer (NK) cells are the major antiviral effector population of the innate immune system. We previously found that S100A9 is a novel ligand of the receptor CD85j and that S100A9 tetramers enhance the anti-HIV activity of NK cells. Also, we found that dendritic cells (DCs) infected by the HIV vaccine candidate, MVAHIV, prime NK cells to specifically control HIV infection in autologous CD4(+) T cells. In this study, we analyzed whether stimulation of NK cells by S100A9 tetramers prior to the priming by MVAHIV-infected DCs modulates the subsequent anti-HIV activity of NK cells. We found that S100A9 tetramers activate NK cells and that DCs enhance the anti-HIV activity of NK cells. Interestingly, we observed that stimulation of NK cells by S100A9 tetramers, prior to the priming, significantly increased the subsequent anti-HIV activity of NK cells and that the enhanced anti-HIV activity was observed following different conditions of priming, including the MVAHIV-priming. As S100A9 tetramers alone directly increase the anti-HIV activity of NK cells and as this increased anti-HIV activity is also observed following the interaction of NK cells with MVAHIV-infected DCs, we propose S100A9 tetramers as potential adjuvants to stimulate the anti-HIV activity of NK cells.
Collapse
Affiliation(s)
- Uriel Y Moreno-Nieves
- Unité de Régulation des Infections Rétrovirales, Department of Virology, Institut Pasteur , Paris , France
| | - Céline Didier
- Unité de Régulation des Infections Rétrovirales, Department of Virology, Institut Pasteur , Paris , France
| | - Yves Lévy
- INSERM U955, AP-HP, Groupe Henri-Mondor Albert-Chenevier, Immunologie Clinique , Creteil , France
| | - Françoise Barré-Sinoussi
- Unité de Régulation des Infections Rétrovirales, Department of Virology, Institut Pasteur , Paris , France
| | - Daniel Scott-Algara
- Unité de Régulation des Infections Rétrovirales, Department of Virology, Institut Pasteur , Paris , France
| | | |
Collapse
|
19
|
Live cell evaluation of granzyme delivery and death receptor signaling in tumor cells targeted by human natural killer cells. Blood 2015; 126:e1-e10. [PMID: 26124495 DOI: 10.1182/blood-2015-03-632273] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 06/19/2015] [Indexed: 01/21/2023] Open
Abstract
Growing interest in natural killer (NK) cell-based therapy for treating human cancer has made it imperative to develop new tools to measure early events in cell death. We recently demonstrated that protease-cleavable luciferase biosensors detect granzyme B and pro-apoptotic caspase activation within minutes of target cell recognition by murine cytotoxic lymphocytes. Here we report successful adaptation of the biosensor technology to assess perforin-dependent and -independent induction of death pathways in tumor cells recognized by human NK cell lines and primary cells. Cell-cell signaling via both Fc receptors and NK-activating receptors led to measurable luciferase signal within 15 minutes. In addition to the previously described aspartase-cleavable biosensors, we report development of granzyme A and granzyme K biosensors, for which no other functional reporters are available. The strength of signaling for granzyme biosensors was dependent on perforin expression in IL-2-activated NK effectors. Perforin-independent induction of apoptotic caspases was mediated by death receptor ligation and was detectable after 45 minutes of conjugation. Evidence of both FasL and TRAIL-mediated signaling was seen after engagement of Jurkat cells by perforin-deficient human cytotoxic lymphocytes. Although K562 cells have been reported to be insensitive to TRAIL, robust activation of pro-apoptotic caspases by NK cell-derived TRAIL was detectable in K562 cells. These studies highlight the sensitivity of protease-cleaved luciferase biosensors to measure previously undetectable events in live cells in real time. Further development of caspase and granzyme biosensors will allow interrogation of additional features of granzyme activity in live cells including localization, timing, and specificity.
Collapse
|
20
|
Ma J, Hu Y, Guo M, Huang Z, Li W, Wu Y. hERG potassium channel blockage by scorpion toxin BmKKx2 enhances erythroid differentiation of human leukemia cells K562. PLoS One 2013; 8:e84903. [PMID: 24386436 PMCID: PMC3873423 DOI: 10.1371/journal.pone.0084903] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 11/28/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The hERG potassium channel can modulate the proliferation of the chronic myelogenous leukemic K562 cells, and its role in the erythroid differentiation of K562 cells still remains unclear. PRINCIPAL FINDINGS The hERG potassium channel blockage by a new 36-residue scorpion toxin BmKKx2, a potent hERG channel blocker with IC50 of 6.7 ± 1.7 nM, enhanced the erythroid differentiation of K562 cells. The mean values of GPA (CD235a) fluorescence intensity in the group of K562 cells pretreated by the toxin for 24 h and followed by cytosine arabinoside (Ara-C) treatment for 72 h were about 2-fold stronger than those of K562 cells induced by Ara-C alone. Such unique role of hERG potassium channel was also supported by the evidence that the effect of the toxin BmKKx2 on cell differentiation was nullified in hERG-deficient cell lines. During the K562 cell differentiation, BmKKx2 could also suppress the expression of hERG channels at both mRNA and protein levels. Besides the function of differentiation enhancement, BmKKx2 was also found to promote the differentiation-dependent apoptosis during the differentiation process of K562 cells. In addition, the blockage of hERG potassium channel by toxin BmKKx2 was able to decrease the intracellular Ca(2+) concentration during the K562 cell differentiation, providing an insight into the mechanism of hERG potassium channel regulating this cellular process. CONCLUSIONS/SIGNIFICANCE Our results revealed scorpion toxin BmKKx2 could enhance the erythroid differentiation of leukemic K562 cells via inhibiting hERG potassium channel currents. These findings would not only accelerate the functional research of hERG channel in different leukemic cells, but also present the prospects of natural scorpion toxins as anti-leukemic drugs.
Collapse
Affiliation(s)
- Jian Ma
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Youtian Hu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Mingxiong Guo
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Zan Huang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Wenxin Li
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail: (WL); (YW)
| | - Yingliang Wu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail: (WL); (YW)
| |
Collapse
|
21
|
Pelham C, Jimenez T, Rodova M, Rudolph A, Chipps E, Islam MR. Regulation of HFE expression by poly(ADP-ribose) polymerase-1 (PARP1) through an inverted repeat DNA sequence in the distal promoter. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2013; 1829:1257-1265. [PMID: 24184271 DOI: 10.1016/j.bbagrm.2013.10.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 09/28/2013] [Accepted: 10/22/2013] [Indexed: 02/08/2023]
Abstract
Hereditary hemochromatosis (HH) is a common autosomal recessive disorder of iron overload among Caucasians of northern European descent. Over 85% of all cases with HH are due to mutations in the hemochromatosis protein (HFE) involved in iron metabolism. Although the importance in iron homeostasis is well recognized, the mechanism of sensing and regulating iron absorption by HFE, especially in the absence of iron response element in its gene, is not fully understood. In this report, we have identified an inverted repeat sequence (ATGGTcttACCTA) within 1700bp (-1675/+35) of the HFE promoter capable to form cruciform structure that binds PARP1 and strongly represses HFE promoter. Knockdown of PARP1 increases HFE mRNA and protein. Similarly, hemin or FeCl3 treatments resulted in increase in HFE expression by reducing nuclear PARP1 pool via its apoptosis induced cleavage, leading to upregulation of the iron regulatory hormone hepcidin mRNA. Thus, PARP1 binding to the inverted repeat sequence on the HFE promoter may serve as a novel iron sensing mechanism as increased iron level can trigger PARP1 cleavage and relief of HFE transcriptional repression.
Collapse
Affiliation(s)
- Christopher Pelham
- Biochemistry Laboratory, Northwest Missouri State University, Maryville, MO 64468
| | - Tamara Jimenez
- Biochemistry Laboratory, Northwest Missouri State University, Maryville, MO 64468
| | - Marianna Rodova
- Biochemistry Laboratory, Northwest Missouri State University, Maryville, MO 64468
| | - Angela Rudolph
- Biochemistry Laboratory, Northwest Missouri State University, Maryville, MO 64468
| | - Elizabeth Chipps
- Biochemistry Laboratory, Northwest Missouri State University, Maryville, MO 64468
| | - M Rafiq Islam
- Biochemistry Laboratory, Northwest Missouri State University, Maryville, MO 64468
| |
Collapse
|
22
|
Xie D, Boyle AP, Wu L, Zhai J, Kawli T, Snyder M. Dynamic trans-acting factor colocalization in human cells. Cell 2013; 155:713-24. [PMID: 24243024 DOI: 10.1016/j.cell.2013.09.043] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 07/13/2013] [Accepted: 08/27/2013] [Indexed: 01/02/2023]
Abstract
Different trans-acting factors (TFs) collaborate and act in concert at distinct loci to perform accurate regulation of their target genes. To date, the cobinding of TF pairs has been investigated in a limited context both in terms of the number of factors within a cell type and across cell types and the extent of combinatorial colocalizations. Here, we use an approach to analyze TF colocalization within a cell type and across multiple cell lines at an unprecedented level. We extend this approach with large-scale mass spectrometry analysis of immunoprecipitations of 50 TFs. Our combined approach reveals large numbers of interesting TF-TF associations. We observe extensive change in TF colocalizations both within a cell type exposed to different conditions and across multiple cell types. We show distinct functional annotations and properties of different TF cobinding patterns and provide insights into the complex regulatory landscape of the cell.
Collapse
Affiliation(s)
- Dan Xie
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | | | | | | | | | | |
Collapse
|
23
|
Xu J, Xu Z, Zhou JY, Zhuang Z, Wang E, Boerner J, Wu GS. Regulation of the Src-PP2A interaction in tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL)-induced apoptosis. J Biol Chem 2013; 288:33263-71. [PMID: 24100030 DOI: 10.1074/jbc.m113.508093] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
TNF-related apoptosis-inducing ligand (TRAIL) selectively induces apoptosis in transformed and tumor cells but not in normal cells, making it a promising agent for cancer therapy. However, many cancer cells are resistant to TRAIL, and the underlying mechanisms are not fully understood. Here, we show that the regulation of the PP2A and Src interaction plays a critical role in TRAIL resistance. Specifically, we show that TRAIL treatment activates the tyrosine kinase Src, which subsequently phosphorylates caspase-8 at tyrosine 380, leading to the inhibition of caspase-8 activation. We also show that upon TRAIL treatment, Src, caspase-8, and PP2A/C (a catalytic subunit of the PP2A phosphatase) are redistributed into lipid rafts, a microdomain of the plasma membrane enriched with cholesterol, where PP2A dephosphorylates Src at tyrosine 418 and in turn inhibits caspase-8 phosphorylation. Furthermore, we find that TRAIL treatment causes PP2A/C degradation. These data suggest that the balance between Src-mediated caspase-8 phosphorylation and the inactivation of Src-mediated caspase-8 phosphorylation by PP2A determines the outcome of TRAIL treatment in breast cancer cells. Therefore, this work identifies a novel mechanism by which the interaction between PP2A and Src in the context of caspase-8 activation modulates TRAIL sensitivity in cancer cells.
Collapse
Affiliation(s)
- Jing Xu
- From the Karmanos Cancer Institute, Departments of Oncology and Pathology, Wayne State University School of Medicine, Detroit, Michigan 48201
| | | | | | | | | | | | | |
Collapse
|
24
|
Huang YW, Lee WH, Tsai YH, Huang HM. Activin A induction of erythroid differentiation sensitizes K562 chronic myeloid leukemia cells to a subtoxic concentration of imatinib. Am J Physiol Cell Physiol 2013; 306:C37-44. [PMID: 24088895 DOI: 10.1152/ajpcell.00130.2013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chronic myeloid leukemia (CML) is a hematopoietic stem/progenitor cell disorder in which Bcr-Abl oncoprotein inhibits cell differentiation. Differentiation induction is considered an alternative strategy for treating CML. Activin A, a member of the transforming growth factor-β superfamily, induces erythroid differentiation of CML cells through the p38 MAPK pathway. In this study, treatment of the K562 CML stem/progenitor cell line with activin A followed by a subtoxic concentration of the Bcr-Abl inhibitor imatinib strongly induced growth inhibition and apoptosis compared with simultaneous treatment with activin A and imatinib. Imatinib-induced growth inhibition and apoptosis following activin A pretreatment were dose- and time-dependent. Imatinib-induced growth inhibition and apoptosis were also dependent on the pretreatment dose of activin A. More than 90% of the activin A-induced increases in glycophorin A-positive cells were sensitive to imatinib. However, only some of original glycophorin A-positive cells in the activin A treatment group were sensitive to imatinib. Sequential treatment with activin A and imatinib decreased Bcr-Abl, procaspase-3, Mcl-1, and Bcl-xL and also induced cleavage of procaspase-3/poly(ADP-ribose)polymerase. The reduction of erythroid differentiation in p38 MAPK dominant-negative mutants or by short hairpin RNA knockdown of p38 MAPK decreased the growth inhibition and apoptosis mediated by sequential treatment with activin A and imatinib. Furthermore, the same inhibition level of multidrug resistance 1 expression was observed in cells treated with activin A alone, treated sequentially with activin A and imatinib, or treated simultaneously with activin A and imatinib. The p38 MAPK inhibitor SB-203580 can restore activin A-inhibited multidrug resistance 1 expression. Taken together, our results suggest that a subtoxic concentration of imatinib could exhibit strong cytotoxicity against erythroid-differentiated K562 CML cells.
Collapse
Affiliation(s)
- Yu-Wen Huang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | | | | | | |
Collapse
|
25
|
Sarkar S, Faller DV. Telomere-homologous G-rich oligonucleotides sensitize human ovarian cancer cells to TRAIL-induced growth inhibition and apoptosis. Nucleic Acid Ther 2013; 23:167-74. [PMID: 23634944 DOI: 10.1089/nat.2012.0401] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
G-rich T-oligos (GT-oligos; oligonucleotides with homology to telomeres) elicit a DNA damage response in cells and induce cytotoxic effects in certain tumor cell lines. We have previously shown that GT-oligo inhibits growth, arrests cell cycle, and induces apoptosis in ovarian, pancreatic, and prostate cancer cells. However, not all ovarian cancer cell lines are susceptible to GT-oligo exposure. GT-oligo was found to induce transcript expression of the tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) receptors DR-4 and DR-5, which are generally silenced in ovarian cancer cells, rendering them insensitive to TRAIL. Exposure of TRAIL- and GT-oligo-resistant cell lines to GT-oligo rendered them sensitive to the cytotoxic effects of TRAIL, producing more than additive inhibition of growth. An intracellular inhibitor of the extrinsic apoptotic pathway, FLICE-like Inhibitory Protein-Short (FLIPs), was down-regulated and Jun kinase (JNK) was activated by exposure to GT-oligo. JNK inhibition partially reversed the growth inhibition caused by the combination of GT-oligo and TRAIL indicating partial involvement of the Jun kinase pathway in the resulting cytotoxic effect. Both capase-8 and caspases 3/7 were activated by exposure to GT-oligo plus TRAIL, consistent with activation of the extrinsic apoptotic pathway. These results demonstrate a novel way of sensitizing resistant ovarian cancer cells to TRAIL-mediated cytotoxicity.
Collapse
Affiliation(s)
- Sibaji Sarkar
- Cancer Center, Boston University School of Medicine, Boston, Massachusetts 02118, USA
| | | |
Collapse
|
26
|
5,7-Dihydroxyflavone Enhances the Apoptosis-Inducing Potential of TRAIL in Human Tumor Cells via Regulation of Apoptosis-Related Proteins. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:434709. [PMID: 23533482 PMCID: PMC3600283 DOI: 10.1155/2013/434709] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Accepted: 12/08/2012] [Indexed: 01/15/2023]
Abstract
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a promising candidate for the treatment of cancer, because it preferentially induces apoptosis in numerous cancer cells with little or no effect on normal cells. 5,7-Dihydroxyflavone is a dietary flavonoid commonly found in many plants. Here we show that the combined treatment with 5,7-dihydroxyflavone and TRAIL at subtoxic concentrations induced strong apoptotic response in human hepatocarcinoma HepG2 cells, acute leukemia Jurkat T cells, and cervical carcinoma HeLa cells. We further investigated the mechanisms by which 5,7-dihydroxyflavone augments TRAIL-induced apoptosis in HepG2 cells. 5,7-Dihydroxyflavone up-regulated the expression of pro-apoptotic protein Bax, attenuated the expression of anti-apoptotic proteins Bcl-2, Mcl-1, and IAPs, and reduced the phosphorylation levels of Akt and STAT3, weakening the anti-apoptotic signals thus facilitating the process of apoptosis. Moreover, 5,7-dihydroxyflavone and TRAIL were well tolerated in mice, and the combination of 5,7-dihydroxyflavone and TRAIL reduced tumor burden in vivo in a HepG2 tumor xenograft model. Interestingly, 5,7-dihydroxyflavone-mediated sensitization to TRAIL-induced cell death was not observed in normal human hepatocytes L-O2. These results suggest that the 5,7-dihydroxyflavone in combination with TRAIL might be used for cancer prevention and/or therapy.
Collapse
|
27
|
Yamanaka YJ, Berger CT, Sips M, Cheney PC, Alter G, Love JC. Single-cell analysis of the dynamics and functional outcomes of interactions between human natural killer cells and target cells. Integr Biol (Camb) 2013; 4:1175-84. [PMID: 22945136 DOI: 10.1039/c2ib20167d] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Natural killer (NK) cells are a subset of innate immune lymphocytes that interrogate potential target cells and rapidly respond by lysing them or secreting inflammatory immunomodulators. Productive interactions between NK cells and targets such as tumor cells or virally infected cells are critical for immunological control of malignancies and infections. For individual NK cells, however, the relationship between the characteristics of these cell-cell interactions, cytolysis, and secretory activity is not well understood. Here, we used arrays of subnanoliter wells (nanowells) to monitor individual NK cell-target cell interactions and quantify the resulting cytolytic and secretory responses. We show that NK cells operate independently when lysing a single target cell and that lysis is most probable during an NK cell's first encounter with a target. Furthermore, we demonstrate that the secretion of interferon-γ (IFN-γ) occurs most often among NK cells that become the least motile upon contacting a target cell but is largely independent of cytolysis. Our findings demonstrate that integrated analysis of the cell-cell interaction parameters, cytolytic activity, and secretory activity of single NK cells can reveal new insights into how these complex functions are related within individual cells.
Collapse
Affiliation(s)
- Yvonne J Yamanaka
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA
| | | | | | | | | | | |
Collapse
|
28
|
Shi Y, Mellier G, Huang S, White J, Pervaiz S, Tucker-Kellogg L. Computational modelling of LY303511 and TRAIL-induced apoptosis suggests dynamic regulation of cFLIP. ACTA ACUST UNITED AC 2012; 29:347-54. [PMID: 23239672 PMCID: PMC3562069 DOI: 10.1093/bioinformatics/bts702] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
MOTIVATION TRAIL has been widely studied for the ability to kill cancer cells selectively, but its clinical usefulness has been hindered by the development of resistance. Multiple compounds have been identified that sensitize cancer cells to TRAIL-induced apoptosis. The drug LY303511 (LY30), combined with TRAIL, caused synergistic (greater than additive) killing of multiple cancer cell lines. We used mathematical modelling and ordinary differential equations to represent how LY30 and TRAIL individually affect HeLa cells, and to predict how the combined treatment achieves synergy. RESULTS Model-based predictions were compared with in vitro experiments. The combination treatment model was successful at mimicking the synergistic levels of cell death caused by LY30 and TRAIL combined. However, there were significant failures of the model to mimic upstream activation at early time points, particularly the slope of caspase-8 activation. This flaw in the model led us to perform additional measurements of early caspase-8 activation. Surprisingly, caspase-8 exhibited a transient decrease in activity after LY30 treatment, prior to strong activation. cFLIP, an inhibitor of caspase-8 activation, was up-regulated briefly after 30 min of LY30 treatment, followed by a significant down-regulation over prolonged exposure. A further model suggested that LY30-induced fluctuation of cFLIP might result from tilting the ratio of two key species of reactive oxygen species (ROS), superoxide and hydrogen peroxide. Computational modelling extracted novel biological implications from measured dynamics, identified time intervals with unexplained effects, and clarified the non-monotonic effects of the drug LY30 on cFLIP during cancer cell apoptosis.
Collapse
Affiliation(s)
- Yuan Shi
- Singapore-MIT Alliance, E4-04-10, 4 Engineering Drive 3, Singapore
| | | | | | | | | | | |
Collapse
|
29
|
Zhuang H, Jiang W, Zhang X, Qiu F, Gan Z, Cheng W, Zhang J, Guan S, Tang B, Huang Q, Wu X, Huang X, Jiang W, Hu Q, Lu M, Hua ZC. Suppression of HSP70 expression sensitizes NSCLC cell lines to TRAIL-induced apoptosis by upregulating DR4 and DR5 and downregulating c-FLIP-L expressions. J Mol Med (Berl) 2012; 91:219-35. [DOI: 10.1007/s00109-012-0947-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 07/16/2012] [Accepted: 08/07/2012] [Indexed: 12/22/2022]
|
30
|
Bansal H, Seifert T, Bachier C, Rao M, Tomlinson G, Iyer SP, Bansal S. The transcription factor Wilms tumor 1 confers resistance in myeloid leukemia cells against the proapoptotic therapeutic agent TRAIL (tumor necrosis factor α-related apoptosis-inducing ligand) by regulating the antiapoptotic protein Bcl-xL. J Biol Chem 2012; 287:32875-80. [PMID: 22898820 DOI: 10.1074/jbc.c112.366559] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tumor necrosis factor α-related apoptosis-inducing ligand (TRAIL) is considered a promising cancer therapeutic agent due to its ability to induce apoptosis in a variety of cancer cells, while sparing normal cells. However, many human tumors including acute myeloid leukemia (AML) are partially or completely resistant to monotherapy with TRAIL, limiting its therapeutic utility. Therefore, identification of factors that contribute to TRAIL resistance may facilitate future development of more effective TRAIL-based cancer therapies. Here, we report a previously unknown role for WT1 in mediating TRAIL resistance in leukemia. Knockdown of WT1 with shRNA rendered TRAIL-resistant myeloid leukemia cells sensitive to TRAIL-induced cell death, and re-expression of shRNA-resistant WT1 restored TRAIL resistance. Notably, TRAIL-mediated apoptosis in WT1-silenced cells was largely due to down-regulation of the antiapoptotic protein Bcl-xL. Moreover, WT1 expression strongly correlated with overexpression of Bcl-xL in AML cell lines and blasts from AML patients. Furthermore, we found that WT1 transactivates Bcl-xL by directly binding to its promoter. We previously showed that WT1 is a novel client protein of heat shock protein 90 (Hsp90). Consistent with this, pharmacological inhibition of Hsp90 resulted in reduced WT1 and Bcl-xL expression leading to increased sensitivity of leukemia cells to TRAIL-mediated apoptosis. Collectively, our results suggest that WT1-dependent Bcl-xL overexpression contributes to TRAIL resistance in myeloid leukemias.
Collapse
Affiliation(s)
- Hima Bansal
- Greehey Children's Cancer Research Institute, The University of Texas Health Science Center, San Antonio, Texas 78229, USA
| | | | | | | | | | | | | |
Collapse
|
31
|
Martín-Pérez R, Niwa M, López-Rivas A. ER stress sensitizes cells to TRAIL through down-regulation of FLIP and Mcl-1 and PERK-dependent up-regulation of TRAIL-R2. Apoptosis 2012; 17:349-63. [PMID: 22072062 DOI: 10.1007/s10495-011-0673-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Despite recent evidences suggesting that agents inducing endoplasmic reticulum (ER) stress could be exploited as potential antitumor drugs in combination with tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), the mechanisms of this anticancer action are not fully understood. Moreover, the effects of ER stress and TRAIL in nontransformed cells remain to be investigated. In this study we report that ER stress-inducing agents sensitizes both transformed and nontransformed cells to TRAIL-induced apoptosis. In addition, glucose-regulated protein of 78 kDa (GRP78) knockdown by RNA interference induces ER stress and facilitates apoptosis by TRAIL. We demonstrate that TRAIL death-inducing signaling complex (DISC) formation and early signaling are enhanced in ER stressed cells. ER stress alters the cellular levels of different apoptosis-related proteins including a decline in the levels of FLIP and Mcl-1 and the up-regulation of TRAIL-R2. Up-regulation of TRAIL-R2 following ER stress is dependent on the expression of PKR-like ER kinase (PERK) and independent of CAAT/enhancer binding protein homologous protein (CHOP) and Ire1α. Silencing of TRAIL-R2 expression by siRNA blocks the ER stress-mediated sensitization to TRAIL-induced apoptosis. Furthermore, simultaneous silencing of cFLIP and Mcl-1 expression by RNA interference results in a marked sensitization to TRAIL-induced apoptosis. Finally, in FLIP-overexpressing cells ER stress-induced sensitization to TRAIL-activated apoptosis is markedly reduced. In summary, our data reveal a pleiotropic mechanism involving both apoptotic and anti-apoptotic proteins for the sensitizing effect of ER stress on the regulation of TRAIL receptor-mediated apoptosis in both transformed and nontransformed cells.
Collapse
Affiliation(s)
- Rosa Martín-Pérez
- Centro Andaluz de Biología Molecular y Medicina Regenerativa, Consejo Superior de Investigaciones Científicas, Sevilla, Spain
| | | | | |
Collapse
|
32
|
Kim HB, Kim MJ, Lee SH, Lee JW, Bae JH, Kim DW, Dao TT, Oh WK, Kang CD, Kim SH. Amurensin G, a novel SIRT1 inhibitor, sensitizes TRAIL-resistant human leukemic K562 cells to TRAIL-induced apoptosis. Biochem Pharmacol 2012; 84:402-10. [PMID: 22483777 DOI: 10.1016/j.bcp.2012.03.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 03/21/2012] [Accepted: 03/21/2012] [Indexed: 12/14/2022]
Abstract
Many types of cancer cells remain resistant towards TRAIL-induced cytotoxicity by the blockade of apoptotic signaling cascades. Thus, sensitizers are needed to enhance the effect of TRAIL-based cancer therapies. Although synergistic tumor cell death has been reported when various HDAC inhibitors were administered with TRAIL in a variety of human cancers, the effect of inhibitors of Class III HDAC such as SIRT1 have not been reported. We reported here for the first time that inhibition of SIRT1 augmented the cytotoxic and apoptotic effects of TRAIL on human leukemic K562 cells. Knockdown of SIRT1 or treatment with amurensin G, a potent new SIRT1 inhibitor, up-regulated the levels of DR5 and c-Myc and down-regulated the level of c-FLIP(L/S). Furthermore, knockdown of SIRT1 or treatment with amurensin G augmented the molecular responses to TRAIL, including activation of caspase-8, -9 and -3, PARP cleavage, up-regulation of Bax, and down-regulation of Bcl-2. Amurensin G-enhanced TRAIL-induced apoptosis was abrogated by caspase inhibitor Z-VAD-FMK. These findings suggest that the suppression of SIRT1 with siRNA or amurensin G sensitize the TRAIL-resistant K562 cell to TRAIL-induced apoptosis, possibly by the up-regulation of c-Myc and DR5 surface expression and the down-regulations of c-FLIP and Mcl-1. In addition, amurensin G, a potent new SIRT1 inhibitor, would be used as a sensitizer of TRAIL in TRAIL-resistant leukemic cells.
Collapse
Affiliation(s)
- Hak-Bong Kim
- Department of Biochemistry and Medical Research Institute, Pusan National University School of Medicine, Yangsan 626-870, South Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Verhoeven HA, van Griensven LJLD. Flow cytometric evaluation of the effects of 3-bromopyruvate (3BP) and dichloracetate (DCA) on THP-1 cells: a multiparameter analysis. J Bioenerg Biomembr 2012; 44:91-9. [PMID: 22318358 DOI: 10.1007/s10863-012-9414-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 01/12/2012] [Indexed: 12/16/2022]
Abstract
Two human leukemia cells K562 and THP-1, the breast cancer lines MCF-7 and ZR-75-1, and the melanoma line MDA-MB-435S were compared by flowcytometry for their behaviour at increasing levels of 3BP. K562 and THP-1 responded to 3BP by membrane depolarization and increased ROS; MCF-7 and ZR-75-1 showed decreased polarization and low ROS increase; MDA-MB-435S had limited depolarization and no ROS increase. THP-1 cells exposed to a range of 3BP concentrations in combination with DCA showed increase of polarization, slight ROS increase, and weakened nuclear integrity. 3BP and DCA show no synergism, but have complementary destructive effects on THP-1 cells. The data led to the conclusion that the THP-1 cells do not carry a functional membrane monocarboxylate transporter (MCT) or that 3BP circumvents MCT binding and can enter these cells independently.
Collapse
Affiliation(s)
- Harrie A Verhoeven
- Bioscience, Plant Research International, Wageningen University and Research Centre, 6700AA Wageningen, the Netherlands.
| | | |
Collapse
|
34
|
Du X, Xiang L, Mackall C, Pastan I. Killing of resistant cancer cells with low Bak by a combination of an antimesothelin immunotoxin and a TRAIL Receptor 2 agonist antibody. Clin Cancer Res 2011; 17:5926-34. [PMID: 21813632 DOI: 10.1158/1078-0432.ccr-11-1235] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
PURPOSE Many solid tumors express cell surface mesothelin making them attractive targets for antibody-based therapies of cancer. SS1P [antimesothelin(Fv)PE38] is a recombinant immunotoxin (RIT) that has potent cytotoxic activity on several cancer cell lines and clinical activity in mesothelioma patients. Pancreatic cancers express mesothelin and are known to be resistant to most chemotherapeutic agents. The goal of this study is to treat pancreatic cancer with RIT by targeting mesothelin. EXPERIMENTAL DESIGN We measured the cytotoxic activity of an antimesothelin immunotoxin on pancreatic cancer cells. We also measured the levels of several pro- and antiapoptotic proteins, as well as the ability of TNF-related apoptosis-inducing ligand (TRAIL) or the anti-TRAIL receptor 2 agonist antibody (HGS-ETR2) to kill pancreatic cells, and the cytotoxic activity of the two agents together in cell culture and against tumors in mice. RESULTS In two pancreatic cancer cell lines, immunotoxin treatment inhibited protein synthesis but did not produce significant cell death. The resistant lines had low levels of the proapoptotic protein Bak. Increasing Bak expression enhanced the sensitivity to immunotoxins, whereas Bak knockdown diminished it. We also found that combining immunotoxin with TRAIL or HGS-ETR2 caused synergistic cell death, and together triggered caspase-8 recruitment and activation, Bid cleavage and Bax activation. Combining SS1P with HGS-ETR2 also acted synergistically to decrease tumor burden in a mouse model. CONCLUSION Our data show that low Bak can cause cancer cells to be resistant to immunotoxin treatment and that combining immunotoxin with TRAIL or a TRAIL agonist antibody can overcome resistance.
Collapse
Affiliation(s)
- Xing Du
- Laboratory of Molecular Biology, Center for Cancer Research, and Pediatric Oncology Branch, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | | | | | | |
Collapse
|
35
|
Zhang X, Inukai T, Akahane K, Hirose K, Kuroda I, Honna H, Goi K, Kagami K, Tauchi T, Yagita H, Sugita K. Endoplasmic reticulum stress inducers, but not imatinib, sensitize Philadelphia chromosome-positive leukemia cells to TRAIL-mediated apoptosis. Leuk Res 2011; 35:940-9. [DOI: 10.1016/j.leukres.2011.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 02/14/2011] [Accepted: 03/11/2011] [Indexed: 11/24/2022]
|
36
|
Golan-Gerstl R, Cohen M, Shilo A, Suh SS, Bakàcs A, Coppola L, Karni R. Splicing factor hnRNP A2/B1 regulates tumor suppressor gene splicing and is an oncogenic driver in glioblastoma. Cancer Res 2011; 71:4464-72. [PMID: 21586613 DOI: 10.1158/0008-5472.can-10-4410] [Citation(s) in RCA: 183] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The process of alternative splicing is widely misregulated in cancer, but the contribution of splicing regulators to cancer development is largely unknown. In this study, we found that the splicing factor hnRNP A2/B1 is overexpressed in glioblastomas and is correlated with poor prognosis. Conversely, patients who harbor deletions of the HNRNPA2B1 gene show better prognosis than average. Knockdown of hnRNP A2/B1 in glioblastoma cells inhibited tumor formation in mice. In contrast, overexpression of hnRNP A2/B1 in immortal cells led to malignant transformation, suggesting that HNRNPA2B1 is a putative proto-oncogene. We then identified several tumor suppressors and oncogenes that are regulated by HNRNPA2B1, among them are c-FLIP, BIN1, and WWOX, and the proto-oncogene RON. Knockdown of RON inhibited hnRNP A2/B1 mediated transformation, which implied that RON is one of the mediators of HNRNPA2B1 oncogenic activity. Together, our results indicate that HNRNPA2B1 is a novel oncogene in glioblastoma and a potential new target for glioblastoma therapy.
Collapse
Affiliation(s)
- Regina Golan-Gerstl
- Department of Biochemistry and Molecular Biology, the Institute for Medical Research Israel-Canada, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | | | | | | | | | | | | |
Collapse
|
37
|
Lee HS, Cho KH, Kim TK, Kim CH, Ahn SJ, Lee EH, Ahn KS, Jung YJ. Cho-kyung-jong-ok-tang, a traditional Korean herbal formula induces type 2 shift in murine natural killer cell cytokine production. JOURNAL OF ETHNOPHARMACOLOGY 2011; 134:281-287. [PMID: 21182916 DOI: 10.1016/j.jep.2010.12.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 12/03/2010] [Accepted: 12/10/2010] [Indexed: 05/30/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cho-kyung-jong-ok-tang (CKJOT) is a traditional Korean herbal formula specifically used for female infertility including unexplained recurrent pregnancy loss (RPL). AIM OF THE STUDY The present study aims to evaluate the effects of CKJOT on mouse natural killer (NK) cells to address the possible immunological basis of protective effects of this herbal medicine on unexplained RPL. MATERIALS AND METHODS NK cells isolated from spleens of 6-week-old C57BL/6 mice were differentiated into NK0, NK1, and NK2 cells in the presence of various concentrations of CKJOT-extract. Apoptotic cell number, level of intracellular cytokines, and expression of cytokine-related transcription factors were measured. RESULTS CKJOT had little effect in improving viability of NK0, NK1, and NK2 cells. However, CKJOT addition during NK cell differentiation suppressed the production of interferon-gamma (IFN-γ), and enhanced that of interleukin-5, in the NK1 and NK2 subsets, respectively. T-bet, a transcription factor associated with IFN-γ expression was down-regulated; while Th2 linked transcription factors (STAT6 and GATA3) were up-regulated especially with 100 μg/mL treatment of CKJOT. CONCLUSION The type 2 shift in NK cell-secreted cytokines induced by CKJOT in mouse NK cells may explain the protective effect associated with its traditional use in unexplained RPL.
Collapse
Affiliation(s)
- Han-Sung Lee
- With-Nature Oriental Clinic Group, Republic of Korea
| | | | | | | | | | | | | | | |
Collapse
|
38
|
Tang H, Qin Y, Li J, Gong X. The scavenging of superoxide radicals promotes apoptosis induced by a novel cell-permeable fusion protein, sTRAIL:FeSOD, in tumor necrosis factor-related apoptosis-inducing ligand-resistant leukemia cells. BMC Biol 2011; 9:18. [PMID: 21418589 PMCID: PMC3068130 DOI: 10.1186/1741-7007-9-18] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Accepted: 03/19/2011] [Indexed: 12/25/2022] Open
Abstract
Background Many cancer cells develop resistance to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis, necessitating combination with chemotherapy, and normal cells manifest side effects due to the combined treatment regimen of TRAIL and chemotherapeutic drugs. A novel cancer therapy utilizing TRAIL is thus urgently needed. Results In this study, we exploited TRAIL receptor-mediated endocytosis for the first time to produce a cell-permeable molecule, soluble forms of recombinant TRAIL:iron superoxide dismutase (sTRAIL:FeSOD), which possesses sTRAIL-induced apoptotic ability and FeSOD antioxidant activity. The FeSOD component was rapidly introduced into the cell by sTRAIL and intracellular superoxide radical (O2-), which have been implicated as potential modulators of apoptosis in cancer cells, was eliminated, resulting in a highly reduced cellular environment. The decrease in cellular O2-, which was accompanied by a brief accumulation of H2O2 and downregulation of phosphorylated Akt (p-Akt) and cellular FLICE-inhibitory protein, sensitized K562 leukemia cells and human promyelocytic leukemia (HL-60) cells to TRAIL-induced apoptosis. The low H2O2 levels protected human LO2 hepatocytes from sTRAIL:FeSOD-induced apoptosis despite downregulation of p-Akt. We also obtained evidence that the lack of response to sTRAIL:FeSOD in normal T cells occurred because sTRAIL:FeSOD shows much stronger shifts of redox state in erythroleukemia (K562) and HL-60 cells compared to that in normal T cells. K562 and HL-60 cells underwent sTRAIL:FeSOD-induced apoptosis without the dysfunction of mitochondria. Conclusions The fusion protein overcomes the inability of FeSOD to permeate the cell membrane, exhibits synergistic apoptotic effects on K562 and HL-60 cells and demonstrates minimal toxicity to normal T cells and the normal liver cell line LO2, indicating its potential value for the treatment of leukemia.
Collapse
Affiliation(s)
- Hongyun Tang
- Institute of Biochemistry, College of Life Sciences, Zijingang campus, Room 345, Zhejiang University, Hangzhou, PR China
| | | | | | | |
Collapse
|
39
|
Akahane K, Inukai T, Zhang X, Hirose K, Kuroda I, Goi K, Honna H, Kagami K, Nakazawa S, Endo K, Kubota T, Yagita H, Koyama-Okazaki T, Sugita K. Resistance of T-cell acute lymphoblastic leukemia to tumor necrosis factor--related apoptosis-inducing ligand-mediated apoptosis. Exp Hematol 2010; 38:885-95. [PMID: 20670671 DOI: 10.1016/j.exphem.2010.06.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2009] [Revised: 06/24/2010] [Accepted: 06/28/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Cytotoxic ligands are involved in tumor immunity and graft-vs.-leukemia effect after allogeneic stem cell transplantation for leukemia. To clarify the susceptibility of T-cell acute lymphoblastic leukemia (T-ALL) to tumor immunity, sensitivity to recombinant human soluble Fas ligand (rhsFasL) and tumor necrosis factor-related apoptosis-inducing ligand (rhsTRAIL) was determined. MATERIALS AND METHODS Sensitivity to rhsFasL and rhsTRAIL and cell surface expression of their receptors were tested in T-ALL cell lines (n = 7) and patients' samples (n = 17) and compared with those in B-precursor ALL cell lines (n = 30). Expression of components of the death-inducing signaling complex and the TRAIL receptor genes (DR4/DR5), and the methylation status and promoter activity of the DR4/DR5 gene were tested in T-ALL cell lines. RESULTS T-ALL cell lines showed higher level of Fas expression and higher sensitivity to rhsFasL than did B-precursor ALL cell lines. Despite comparable expression of components of death-inducing signaling complex, cell lines and patients' samples of T-ALL showed TRAIL-resistance associated with low cell surface expression of DR4/DR5. Gene expression of DR4/DR5 in T-ALL cell lines was significantly lower than that in B-precursor ALL cell lines, and the methylation status of the gene promoter in T-ALL cell lines was associated with the gene expression level at least for DR4. The demethylating agent, 5-aza 2'deoxycytidine, upregulated the gene expression of DR4/DR5, but was insufficient for their surface expression due to low basal promoter activity. CONCLUSIONS In contrast to higher sensitivity to FasL, T-ALL showed resistance to TRAIL, which might be responsible for resistance to TRAIL-mediated cellular immunity.
Collapse
Affiliation(s)
- Koshi Akahane
- Department of Pediatrics, School of Medicine, University of Yamanashi, Yamanashi, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Signaling through C/EBP homologous protein and death receptor 5 and calpain activation differentially regulate THP-1 cell maturation-dependent apoptosis induced by Shiga toxin type 1. Infect Immun 2010; 78:3378-91. [PMID: 20515924 DOI: 10.1128/iai.00342-10] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Shiga toxins (Stxs) induce apoptosis via activation of the intrinsic and extrinsic pathways in many cell types. Toxin-mediated activation of the endoplasmic reticulum (ER) stress response was shown to be instrumental in initiating apoptosis in THP-1 myeloid leukemia cells. THP-1 cells responded to Shiga toxin type 1 (Stx1) in a cell maturation-dependent manner, undergoing rapid apoptosis in the undifferentiated state but reduced and delayed apoptosis in differentiated cells. The onset of apoptosis was associated with calpain activation and changes in expression of C/EBP homologous protein (CHOP), Bcl-2 family members, and death receptor 5 (DR5). Ligation of DR5 by tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) activates the extrinsic pathway of apoptosis. We show here that expression of TRAIL and DR5 is increased by Stx1 treatment. Addition of exogenous TRAIL enhances, and anti-TRAIL antibodies inhibit, Stx1-induced apoptosis of THP-1 cells. Silencing of CHOP or DR5 expression selectively prevented caspase activation, loss of mitochondrial membrane potential, and Stx1-induced apoptosis of macrophage-like THP-1 cells. In contrast, the rapid kinetics of apoptosis induction in monocytic THP-1 cells correlated with rates of calpain cleavage. The results suggest that CHOP-DR5 signaling and calpain activation differentially contribute to cell maturation-dependent Stx1-induced apoptosis. Inhibition of these signaling pathways may protect cells from Stx cytotoxicity.
Collapse
|
41
|
c-FLIP is involved in erythropoietin-mediated protection of erythroid-differentiated cells from TNF-alpha-induced apoptosis. Cell Biol Int 2010; 34:621-30. [PMID: 20218968 DOI: 10.1042/cbi20090085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The TNF-alpha (tumour necrosis factor) affects a wide range of biological activities, such as cell proliferation and apoptosis. Cell life or death responses to this cytokine might depend on cell conditions. This study focused on the modulation of factors that would affect the sensitivity of erythroid-differentiated cells to TNF-alpha. Hemin-differentiated K562 cells showed higher sensitivity to TNF-induced apoptosis than undifferentiated cells. At the same time, hemin-induced erythroid differentiation reduced c-FLIP (cellular FLICE-inhibitory protein) expression. However, this negative effect was prevented by prior treatment with Epo (erythropoietin), which allowed the cell line to maintain c-FLIP levels. On the other hand, erythroid-differentiated UT-7 cells - dependent on Epo for survival - showed resistance to TNF-alpha pro-apoptotic action. Only after the inhibition of PI3K (phosphatidylinositol-3 kinase)-mediated pathways, which was accompanied by negative c-FLIP modulation and increased erythroid differentiation, were UT-7 cells sensitive to TNF-alpha-triggered apoptosis. In summary, erythroid differentiation might deregulate the balance between growth promotion and death signals induced by TNF-alpha, depending on cell type and environmental conditions. The role of c-FLIP seemed to be critical in the protection of erythroid-differentiated cells from apoptosis or in the determination of their sensitivity to TNF-mediated programmed cell death. Epo, which for the first time was found to be involved in the prevention of c-FLIP down-regulation, proved to have an anti-apoptotic effect against the pro-inflammatory factor. The identification of signals related to cell life/death switching would have significant implications in the control of proliferative diseases and would contribute to the understanding of mechanisms underlying the anaemia associated with inflammatory processes.
Collapse
|
42
|
Stegmann KA, Björkström NK, Veber H, Ciesek S, Riese P, Wiegand J, Hadem J, Suneetha PV, Jaroszewicz J, Wang C, Schlaphoff V, Fytili P, Cornberg M, Manns MP, Geffers R, Pietschmann T, Guzmán CA, Ljunggren HG, Wedemeyer H. Interferon-alpha-induced TRAIL on natural killer cells is associated with control of hepatitis C virus infection. Gastroenterology 2010; 138:1885-97. [PMID: 20334827 DOI: 10.1053/j.gastro.2010.01.051] [Citation(s) in RCA: 158] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Revised: 01/15/2010] [Accepted: 01/22/2010] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS Pegylated interferon-alpha (PEG-IFNalpha), in combination with ribavirin, controls hepatitis C virus (HCV) infection in approximately 50% of patients by mechanisms that are not completely understood. Beside a direct antiviral effect, different immunomodulatory effects have been discussed. Natural killer (NK) cells might be associated with control of HCV infection. We examined the effects of IFNalpha on human NK cells and its relevance to HCV infection. METHODS We performed gene expression profiling studies of NK cells following stimulation of peripheral blood mononuclear cells with IFNalpha. We evaluated IFNalpha-induced tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) expression using flow cytometry analyses of NK cells isolated from patients with acute or chronic hepatitis C that had received PEG-IFNalpha therapy. RESULTS TRAIL was among the most up-regulated genes after IFNalpha stimulation of NK cells from healthy controls. After in vitro stimulation with IFNalpha, CD56(dim) NK cells from patients who had responded to PEG-IFNalpha therapy expressed higher levels of TRAIL than cells from patients with chronic hepatitis C. TRAIL expression, ex vivo, was inversely correlated with HCV-RNA levels during the early phase of PEG-IFNalpha therapy. In patients with acute hepatitis C, TRAIL expression on CD56(bright) NK cells increased significantly compared with cells from controls. In in vitro studies, IFNalpha-stimulated NK cells eliminated HCV-replicating hepatoma cells by a TRAIL-mediated mechanism. CONCLUSIONS IFNalpha-induced expression of TRAIL on NK cells is associated with control of HCV infection; these observations might account for the second-phase decline in HCV-RNA levels during PEG-IFNalpha therapy.
Collapse
Affiliation(s)
- Kerstin A Stegmann
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
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.
Collapse
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:
| |
Collapse
|
44
|
Heteronemin, a spongean sesterterpene, inhibits TNF alpha-induced NF-kappa B activation through proteasome inhibition and induces apoptotic cell death. Biochem Pharmacol 2010; 79:610-22. [PMID: 19814997 DOI: 10.1016/j.bcp.2009.09.027] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 09/29/2009] [Accepted: 09/30/2009] [Indexed: 01/08/2023]
Abstract
In this study, we investigated the biological effects of heteronemin, a marine sesterterpene isolated from the sponge Hyrtios sp. on chronic myelogenous leukemia cells. To gain further insight into the molecular mechanisms triggered by this compound, we initially performed DNA microarray profiling and determined which genes respond to heteronemin stimulation in TNFalpha-treated cells and which genes display an interaction effect between heteronemin and TNFalpha. Within the differentially regulated genes, we found that heteronemin was affecting cellular processes including cell cycle, apoptosis, mitogen-activated protein kinases (MAPKs) pathway and the nuclear factor kappaB (NF-kappaB) signaling cascade. We confirmed in silico experiments regarding NF-kappaB inhibition by reporter gene analysis, electrophoretic mobility shift analysis and I-kappaB degradation. In order to assess the underlying molecular mechanisms, we determined that heteronemin inhibits both trypsin and chymotrypsin-like proteasome activity at an IC(50) of 0.4 microM. Concomitant to the inhibition of the NF-kappaB pathway, we also observed a reduction in cellular viability. Heteronemin induces apoptosis as shown by annexin V-FITC/propidium iodide-staining, nuclear morphology analysis, pro-caspase-3, -8 and -9 and poly(ADP-ribose) polymerase (PARP) cleavage as well as truncation of Bid. Altogether, results show that this compound has potential as anti-inflammatory and anti-cancer agent.
Collapse
|
45
|
Lluis JM, Nachbur U, Cook WD, Gentle IE, Moujalled D, Moulin M, Wong WWL, Khan N, Chau D, Callus BA, Vince JE, Silke J, Vaux DL. TAK1 is required for survival of mouse fibroblasts treated with TRAIL, and does so by NF-kappaB dependent induction of cFLIPL. PLoS One 2010; 5:e8620. [PMID: 20062539 PMCID: PMC2797639 DOI: 10.1371/journal.pone.0008620] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 12/06/2009] [Indexed: 12/21/2022] Open
Abstract
Tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) is known as a “death ligand”—a member of the TNF superfamily that binds to receptors bearing death domains. As well as causing apoptosis of certain types of tumor cells, TRAIL can activate both NF-κB and JNK signalling pathways. To determine the role of TGF-β-Activated Kinase-1 (TAK1) in TRAIL signalling, we analyzed the effects of adding TRAIL to mouse embryonic fibroblasts (MEFs) derived from TAK1 conditional knockout mice. TAK1−/− MEFs were significantly more sensitive to killing by TRAIL than wild-type MEFs, and failed to activate NF-κB or JNK. Overexpression of IKK2-EE, a constitutive activator of NF-κB, protected TAK1−/− MEFs against TRAIL killing, suggesting that TAK1 activation of NF-κB is critical for the viability of cells treated with TRAIL. Consistent with this model, TRAIL failed to induce the survival genes cIAP2 and cFlipL in the absence of TAK1, whereas activation of NF-κB by IKK2-EE restored the levels of both proteins. Moreover, ectopic expression of cFlipL, but not cIAP2, in TAK1−/− MEFs strongly inhibited TRAIL-induced cell death. These results indicate that cells that survive TRAIL treatment may do so by activation of a TAK1–NF-κB pathway that drives expression of cFlipL, and suggest that TAK1 may be a good target for overcoming TRAIL resistance.
Collapse
Affiliation(s)
| | - Ulrich Nachbur
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | - Wendy Diane Cook
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | | | - Donia Moujalled
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | - Maryline Moulin
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | | | - Nufail Khan
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | - Diep Chau
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | - Bernard Andrew Callus
- School of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, Crawley, Australia
| | - James Edward Vince
- Department of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - John Silke
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
| | - David Lawrence Vaux
- Deparment of Biochemistry, La Trobe University, Bundoora, Australia
- * E-mail:
| |
Collapse
|
46
|
Inability of plasmacytoid dendritic cells to directly lyse HIV-infected autologous CD4+ T cells despite induction of tumor necrosis factor-related apoptosis-inducing ligand. J Virol 2009; 84:2762-73. [PMID: 20042498 DOI: 10.1128/jvi.01350-09] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The function of plasmacytoid dendritic cells (PDC) in chronic human immunodeficiency virus type 1 (HIV-1) infection remains controversial with regard to its potential for sustained alpha interferon (IFN-alpha) production and induction of PDC-dependent tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL)-mediated cytotoxicity of HIV-infected cells. We address these areas by a study of chronically HIV-1-infected subjects followed through antiretroviral therapy (ART) interruption and by testing PDC cytolytic function against autologous HIV-infected CD4(+) T cells. Rebound in viremia induced by therapy interruption showed a positive association between TRAIL and viral load or T-cell activation, but comparable levels of plasma IFN-alpha/beta were found in viremic ART-treated and control subjects. While PDC from HIV-infected subjects expressed less interferon regulator factor 7 (IRF-7) and produced significantly less IFN-alpha upon Toll-like receptor 7/9 (TLR7/9) engagement than controls, membrane TRAIL expression in PDC from HIV(+) subjects was increased. Moreover, no significant increase in death receptor 5 (DR5) expression was seen in CD4(+) T cells from viremic HIV(+) subjects compared to controls or following in vitro infection/exposure to infectious and noninfectious virus or exogenous IFN-alpha, respectively. Although activated PDC killed the DR5-expressing HIV-infected Sup-T1 cell line, PDC did not lyse primary autologous HIV(+) CD4(+) T cells yet could provide accessory help for NK cells in killing HIV-infected autologous CD4(+) T cells. Taken together, our data show a lack of sustained high levels of soluble IFN-alpha in chronic HIV-1 infection in vivo and document a lack of direct PDC cytolytic activity against autologous infected or uninfected CD4(+) T cells.
Collapse
|
47
|
Sánchez-Pérez T, Ortiz-Ferrón G, López-Rivas A. Mitotic arrest and JNK-induced proteasomal degradation of FLIP and Mcl-1 are key events in the sensitization of breast tumor cells to TRAIL by antimicrotubule agents. Cell Death Differ 2009; 17:883-94. [PMID: 19942932 DOI: 10.1038/cdd.2009.176] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Breast tumor cells are often resistant to tumor necrosis factor-related apoptosis-inducing ligand (tumour necrosis factor-related apoptosis-inducing ligand (TRAIL)/APO-2 L). Here, we describe the sensitization by microtubule-interfering agents (MIAs) to TRAIL-induced apoptosis in breast tumor cells through a mitotic arrest and c-Jun N-terminal kinase (JNK)-dependent mechanism. MIA treatment resulted in BubR1-dependent mitotic arrest leading to the sustained activation of JNK and the proteasome-mediated downregulation of cellular FLICE-inhibitory protein (cFLIP) and myeloid cell leukemia-1 (Mcl-1) expression. The JNK inhibitor SP600125 abrogated MIA-induced mitotic arrest and downregulation of cFLIP and Mcl-1 and reduced the apoptosis caused by the combination of MIAs and TRAIL. Silencing of cFLIP and Mcl-1 expression by RNA interference resulted in a marked sensitization to TRAIL-induced apoptosis. Furthermore, in FLIP-overexpressing cells, MIA-induced sensitization to TRAIL-activated apoptosis was markedly reduced. In summary, our results show that mitotic arrest imposed by MIAs activates JNK and facilitates TRAIL-induced activation of an apoptotic pathway in breast tumor cells by promoting the proteasome-mediated degradation of cFLIP and Mcl-1.
Collapse
Affiliation(s)
- T Sánchez-Pérez
- Centro Andaluz de Biología Molecular y Medicina Regenerativa, Consejo Superior de Investigaciones Científicas, Sevilla, Spain
| | | | | |
Collapse
|
48
|
Sensitization of human K562 leukemic cells to TRAIL-induced apoptosis by inhibiting the DNA-PKcs/Akt-mediated cell survival pathway. Biochem Pharmacol 2009; 78:573-82. [DOI: 10.1016/j.bcp.2009.05.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 05/12/2009] [Accepted: 05/13/2009] [Indexed: 01/09/2023]
|
49
|
Tampio M, Markkanen P, Puttonen KA, Hagelberg E, Heikkinen H, Huhtinen K, Loikkanen J, Hirvonen MR, Vähäkangas KH. Induction of PUMA-α and down-regulation of PUMA-β expression is associated with benzo(a)pyrene-induced apoptosis in MCF-7 cells. Toxicol Lett 2009; 188:214-22. [DOI: 10.1016/j.toxlet.2009.04.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 03/12/2009] [Accepted: 04/20/2009] [Indexed: 01/06/2023]
|
50
|
Sensitization of imatinib-resistant CML cells to TRAIL-induced apoptosis is mediated through down-regulation of Bcr-Abl as well as c-FLIP. Biochem J 2009; 420:73-81. [PMID: 19203346 DOI: 10.1042/bj20082131] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Resistance to imatinib is commonly associated with reactivation of Bcr-Abl signalling. However, Bcr-Abl-independent signalling pathways may be activated and contributed to imatinib resistance in some CML (chronic myelogenous leukaemia) patients. We had isolated three imatinib-resistant K562/R1, R2 and R3 variants with gradual loss of Bcr-Abl from K562 cells to develop effective therapeutic strategies for imatinib-resistant CML. Interestingly, we found that these cells became highly sensitive to TRAIL (tumour necrosis factor-related apoptosis-inducing factor) in comparison with K562 cells showing high resistance to TRAIL. Treatment of K562/R3 cells with TRAIL resulted in activation of TRAIL receptor pathway by including caspase 8 activation, Bid cleavage, cytochrome c release and caspase 3 activation. These results were accompanied by down-regulation of c-FLIP {cellular FLICE [FADD (Fas-associated death domain)-like interleukin 1beta-converting enzyme]-inhibitory protein} in imatinib-resistant K562 variants compared with K562 cells. Overexpression of c-FLIP in K562/R3 cells acquired TRAIL resistance and conversely, c-FLIP-silenced K562 cells became sensitive to TRAIL. Moreover, Bcr-Abl-silenced K562 cells showed down-regulation of c-FLIP and the subsequent overcome of TRAIL resistance. Taken together, our results demonstrated for the first time that the loss of Bcr-Abl in imatinib-resistant cells led to the down-regulation of c-FLIP and subsequent increase of TRAIL sensitivity, suggesting that TRAIL could be an effective strategy for the treatment of imatinib-resistant CML with loss of Bcr-Abl.
Collapse
|