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The Development and Clinical Applications of Oral Arsenic Trioxide for Acute Promyelocytic Leukaemia and Other Diseases. Pharmaceutics 2022; 14:pharmaceutics14091945. [PMID: 36145693 PMCID: PMC9504237 DOI: 10.3390/pharmaceutics14091945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/02/2022] [Accepted: 09/06/2022] [Indexed: 11/17/2022] Open
Abstract
Appreciation of the properties of arsenic trioxide (ATO) has redefined the treatment landscape for acute promyelocytic leukaemia (APL) and offers promise as a treatment for numerous other diseases. The benefits of ATO in patients with APL is related to its ability to counteract the effects of PML::RARA, an oncoprotein that is invariably detected in the blood or bone marrow of affected individuals. The PML::RARA oncoprotein is degraded specifically by binding to ATO. Thus ATO, in combination with all-trans retinoic acid, has become the curative treatment for ATO. The multiple mechanisms of action of ATO has also paved the way for application in various condition encompassing autoimmune or inflammatory disorders, solid organ tumours, lymphomas and other subtypes of AML. The development of oral formulation of ATO (oral ATO) has reduced costs of treatment and improved treatment convenience allowing widespread applicability. In this review, we discuss the mechanisms of action of ATO, the development of oral ATO, and the applications of oral ATO in APL and other diseases.
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Zhang BB, Chen XJ, Fan XD, Zhu JJ, Wei YH, Zheng HS, Zheng HY, Wang BH, Piao JG, Li FZ. Lipid/PAA-coated mesoporous silica nanoparticles for dual-pH-responsive codelivery of arsenic trioxide/paclitaxel against breast cancer cells. Acta Pharmacol Sin 2021; 42:832-842. [PMID: 33824461 PMCID: PMC8182795 DOI: 10.1038/s41401-021-00648-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 03/12/2021] [Indexed: 02/01/2023] Open
Abstract
Nanomedicine has attracted increasing attention and emerged as a safer and more effective modality in cancer treatment than conventional chemotherapy. In particular, the distinction of tumor microenvironment and normal tissues is often used in stimulus-responsive drug delivery systems for controlled release of therapeutic agents at target sites. In this study, we developed mesoporous silica nanoparticles (MSNs) coated with polyacrylic acid (PAA), and pH-sensitive lipid (PSL) for synergistic delivery and dual-pH-responsive sequential release of arsenic trioxide (ATO) and paclitaxel (PTX) (PL-PMSN-PTX/ATO). Tumor-targeting peptide F56 was used to modify MSNs, which conferred a target-specific delivery to cancer and endothelial cells under neoangiogenesis. PAA- and PSL-coated nanoparticles were characterized by TGA, TEM, FT-IR, and DLS. The drug-loaded nanoparticles displayed a dual-pH-responsive (pHe = 6.5, pHendo = 5.0) and sequential drug release profile. PTX within PSL was preferentially released at pH = 6.5, whereas ATO was mainly released at pH = 5.0. Drug-free carriers showed low cytotoxicity toward MCF-7 cells, but ATO and PTX co-delivered nanoparticles displayed a significant synergistic effect against MCF-7 cells, showing greater cell-cycle arrest in treated cells and more activation of apoptosis-related proteins than free drugs. Furthermore, the extracellular release of PTX caused an expansion of the interstitial space, allowing deeper penetration of the nanoparticles into the tumor mass through a tumor priming effect. As a result, FPL-PMSN-PTX/ATO exhibited improved in vivo circulation time, tumor-targeted delivery, and overall therapeutic efficacy.
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Affiliation(s)
- Bing-Bing Zhang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xiao-Jie Chen
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xu-Dong Fan
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Jing-Jing Zhu
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Ying-Hui Wei
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Hang-Sheng Zheng
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Hong-Yue Zheng
- Libraries of Zhejiang Chinese Medical University, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Bin-Hui Wang
- The Affiliated Municipal Hospital of Taizhou University, Taizhou, 318000, China.
| | - Ji-Gang Piao
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
| | - Fan-Zhu Li
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
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Mehrzad J, Mahmudy Gharaie MH, Taheri M. Effects of arsenic on porcine dendritic cells in vitro. J Immunotoxicol 2017; 14:1-8. [PMID: 28094582 DOI: 10.1080/1547691x.2016.1249985] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Exposure to arsenic (As) is an ongoing, and in some places increasing, health problem. Still, however, the effects of As exposure on the immune system are not well understood. Dendritic cells (DC) are a critical immune cell that bridges the innate and adaptive immune systems. To determine the impact of inorganic (i)As exposure on DC, the effects of (geo)anthropogenically relevant levels of NaAsO2 on the function of porcine monocyte-derived DC (MoDC) were evaluated in an in vitro model. The results showed a low dose of iAs reduced the phagocytic capacity of MoDC. Furthermore, although surface expression of DC activation markers, such as major histocompatibility complex (MHC)-II, CD80/86, CD40 and CD25, were only slightly changed, MoDC T-cell proliferation-inducing capacity was remarkably diminished by iAs treatment. Additionally, iAs induced significant interleukin (IL)-6 secretion by MoDC after 12- or 24-h incubation, whereas IL-1β secretion was only significantly up-regulated after 12 h. The secretion patterns of IL-8, tumor necrosis factor α (TNFα and IL-10 by iAs-treated MoDC were almost similar to that by mock-treated MoDC. Considering the broad roles of DC in immunobiology, this finding deepens the understanding of molecular mechanisms/functional consequences underpinning the immunopathology, inflammation, and increases in infection arising from As exposure.
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Affiliation(s)
- Jalil Mehrzad
- a Department of Microbiology and Immunology, Faculty of Veterinary Medicine , University of Tehran , Tehran , Iran
| | | | - Masumeh Taheri
- b Department of Geology, Faculty of Basic Sciences , Ferdowsi University of Mashhad , Mashhad , Iran
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Taheri M, Mehrzad J, Afshari R, Saleh-Moghaddam M, Mahmudy Gharaie MH. Inorganic arsenic can be potent granulotoxin in mammalian neutrophils in vitro. J Immunotoxicol 2016; 13:686-93. [PMID: 27416995 DOI: 10.3109/1547691x.2016.1159625] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
An important outcome arising out of occupational/environmental exposure to arsenic (As) is immunotoxicity. To determine the impact of inorganic As on innate immune cells, effects of a low dose of NaAsO2 (i.e. 20 ng As/ml) on select parameters associated with human and bovine neutrophils (PMN) were evaluated in vitro. PMN isolated from the blood of healthy individuals and cows (n = 8/treatment) were pre-incubated with NaAsO2 for 12 h before effects on PMN phagocytosis, transcription of TLR2, TLR4 and CD64 in human PMN - as well as on phagocytosis-dependent/-independent cell chemiluminescence (CL), phagocytosis and killing of Staphylococcus aureus and Escherichia coli, PMN H2O2 production and necrosis and TLR4 transcription in bovine PMN - were assessed. Relative to control (no As) PMN, treatment with As significantly decreased phagocytic capacity and CD64 mRNA, but increased TLR2 and TLR4 mRNA, in human PMN. In bovine PMN, while As also led to increased TLR4 mRNA abundance, it resulted in decreases in phagocytosis-dependent and -independent CL, PMN H2O2 production, PMN phagocytosis and killing of both E. coli and S. aureus by PMN. Considering the broad roles of PMN in immunology, the results of these studies increase our understanding of functional consequences of As exposure in inducing immunotoxicity and increasing susceptibility to (infectious) diseases in mammals.
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Affiliation(s)
- Masumeh Taheri
- a Biochemistry Section, Department of Biology , Payame Noor University of Mashhad , Mashhad , Iran
| | - Jalil Mehrzad
- b Department of Pathobiology , Immunology and Biotechnology Sections, Institute of Biotechnology, Ferdowsi University of Mashhad , Mashhad , Iran
| | - Reza Afshari
- c Medical Toxicology Research Center, Mashhad University of Medical Sciences , Mashhad , Iran
| | - Massoud Saleh-Moghaddam
- a Biochemistry Section, Department of Biology , Payame Noor University of Mashhad , Mashhad , Iran
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Xiao M, Tang Y, Chen WW, Wang YL, Yang L, Li X, Song GL, Kuang J. Tubb3 regulation by the Erk and Akt signaling pathways: a mechanism involved in the effect of arginine ADP-ribosyltransferase 1 (Art1) on apoptosis of colon carcinoma CT26 cells. Tumour Biol 2015; 37:2353-63. [PMID: 26373733 DOI: 10.1007/s13277-015-4058-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 09/04/2015] [Indexed: 11/29/2022] Open
Abstract
The influence of the most important classical mono-ADP-ribosyltransferase, arginine ADP-ribosyltransferase 1 (Art1), on survival and apoptosis of colon carcinoma cells and the potential mechanisms have been partly discussed in our previous study but still need to be further studied. In this present study, Art1 of colon carcinoma CT26 cells was silenced with lentiviral vector-mediated short hairpin RNA (shRNA) or overexpressed with lentiviral vector-mediated complementary DNA (cDNA) and allograft transplant tumors are established in Balb/c mice. We verified Art1 knockdown increases apoptosis of CT26 cells transplant tumor; Art1 overexpression acts oppositely. Accordingly, growth of transplant tumors is inhibited in Art1 knockdown transplant tumors and increases in Art1 overexpression transplant tumors. Furthermore, activity of Akt and Erk cell signal pathways and expression of an apoptosis biomarker, βIII-tubulin (Tubb3), decrease when Art1 was silenced and increase when Art1 was overexpressed. Inhibiting Akt pathway or Erk pathway both downregulates expression of Tubb3 on protein and messenger RNA (mRNA) level, indicating that Tubb3 could be regulated by both Akt and Erk pathways, and plays a role in the influence of Art1 on apoptosis of Balb/c mice allograft transplant tumor. We also demonstrated that Bcl-2 family is not the responsible downstream factor of the Erk pathway in colon carcinoma cells which is undergoing apoptosis. These findings enrich the molecular mechanism for the function of Art1 in colon carcinoma and provide a complementary support for Art1 to be a potential therapeutic target of the treatment of this kind of malignant tumor.
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Affiliation(s)
- Ming Xiao
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
| | - Yi Tang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
| | - Wen-Wen Chen
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
| | - Ya-Lan Wang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China.
| | - Lian Yang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
| | - Xian Li
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
| | - Guang-Lin Song
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
| | - Jing Kuang
- Department of Pathology, Molecular Medicine and Cancer Research Center, Chongqing Medical University, No. 1 Yixueyuan Rd, Chongqing, 400016, China
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Mayzlish-Gati E, Laufer D, Grivas CF, Shaknof J, Sananes A, Bier A, Ben-Harosh S, Belausov E, Johnson MD, Artuso E, Levi O, Genin O, Prandi C, Khalaila I, Pines M, Yarden RI, Kapulnik Y, Koltai H. Strigolactone analogs act as new anti-cancer agents in inhibition of breast cancer in xenograft model. Cancer Biol Ther 2015; 16:1682-8. [PMID: 26192476 DOI: 10.1080/15384047.2015.1070982] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Strigolactones (SLs) are a novel class of plant hormones. Previously, we found that analogs of SLs induce growth arrest and apoptosis in breast cancer cell lines. These compounds also inhibited the growth of breast cancer stem cell enriched-mammospheres with increased potency. Furthermore, strigolactone analogs inhibited growth and survival of colon, lung, prostate, melanoma, osteosarcoma and leukemia cancer cell lines. To further examine the anti-cancer activity of SLs in vivo, we have examined their effects on growth and viability of MDA-MB-231 tumor xenografts model either alone or in combination with paclitaxel. We show that strigolactone act as new anti-cancer agents in inhibition of breast cancer in xenograft model. In addition we show that SLs affect the integrity of the microtubule network and therefore may inhibit the migratory phenotype of the highly invasive breast cancer cell lines that were examined.
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Affiliation(s)
| | - Dana Laufer
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel.,b Faculty of Engineering Sciences; The Avram and Stella Goldstein-Goren Department of Biotechnology Engineering ; Ben-Gurion University of the Negev ; Beer-Sheva , Israel
| | - Christopher F Grivas
- c Department of Human Science ; SNHS; Georgetown University ; Washington, DC USA
| | - Julia Shaknof
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel
| | - Amiram Sananes
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel.,b Faculty of Engineering Sciences; The Avram and Stella Goldstein-Goren Department of Biotechnology Engineering ; Ben-Gurion University of the Negev ; Beer-Sheva , Israel
| | - Ariel Bier
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel
| | - Shani Ben-Harosh
- b Faculty of Engineering Sciences; The Avram and Stella Goldstein-Goren Department of Biotechnology Engineering ; Ben-Gurion University of the Negev ; Beer-Sheva , Israel
| | - Eduard Belausov
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel
| | - Michael D Johnson
- d Department of Oncology ; Georgetown University Medical Center ; Washington, DC USA.,e The Lombardi Comprehensive Cancer Center; Georgetown University Medical Center ; Washington, DC USA
| | - Emma Artuso
- f Department of Chemistry ; University of Turin ; Torino , Italy
| | - Oshrat Levi
- g Institute of Animal Sciences; Volcani Center ; Bet Dagan , Israel
| | - Ola Genin
- g Institute of Animal Sciences; Volcani Center ; Bet Dagan , Israel
| | - Cristina Prandi
- f Department of Chemistry ; University of Turin ; Torino , Italy
| | - Isam Khalaila
- b Faculty of Engineering Sciences; The Avram and Stella Goldstein-Goren Department of Biotechnology Engineering ; Ben-Gurion University of the Negev ; Beer-Sheva , Israel
| | - Mark Pines
- g Institute of Animal Sciences; Volcani Center ; Bet Dagan , Israel
| | - Ronit I Yarden
- c Department of Human Science ; SNHS; Georgetown University ; Washington, DC USA.,e The Lombardi Comprehensive Cancer Center; Georgetown University Medical Center ; Washington, DC USA
| | - Yoram Kapulnik
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel
| | - Hinanit Koltai
- a Institute of Plant Sciences; ARO; Volcani Center ; Bet Dagan , Israel
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Nuta O, Moquet J, Bouffler S, Lloyd D, Sepai O, Rothkamm K. Impact of long-term exposure to sodium arsenite on cytogenetic radiation damage. Mutagenesis 2014; 29:123-9. [PMID: 24452505 DOI: 10.1093/mutage/get070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The aim of this work was to investigate the impact of long-term exposure to low concentrations of sodium arsenite on the cellular response to ionising radiation. Human lymphoblastoid GM1899a cells were cultured in the presence of sodium arsenite for up to six months. Following chemical exposure, acute challenge doses of X-rays were given and chromosome damage (dicentrics, acentric fragments, translocations, micronuclei) as well as cell growth and changes in cell cycle kinetics were determined. Initial short-term chemical exposures determined 8 ng/ml (60 nM) sodium arsenite as a suitable concentration for chronic exposures, which is below the current World Health Organization limit for arsenic in drinking water. At this concentration, cell growth was slightly, but consistently, slower than in untreated cultures throughout the six-month exposure period. Long-term exposure to the chemical induced no dicentrics and did not significantly alter the yield of dicentrics induced by 1 Gy acute X-irradiation. Similar results were obtained for chromosome translocations. In contrast, exposure to 8 ng/ml sodium arsenite induced significant levels of acentric fragments and micronuclei. Fragment/micronuclei data in combined treatment samples compared with single treatments were consistent with an additive effect of chemical and radiation exposure. As for X-rays, micronuclei induced by sodium arsenite tended to show no centromere in situ hybridisation signal, indicating that they represent structural aberrations rather than mis-segregated chromosomes. Similar results were obtained in human peripheral lymphocytes following short-term exposure to sodium arsenite or X-rays. Overall, an additive effect was observed for all combined exposures. Cellular radiation responses therefore seem to operate without any modulatory effects from chronic low level exposure to sodium arsenite in the systems analysed here.
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Affiliation(s)
- Otilia Nuta
- Public Health England, Centre for Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxon, OX11 0RQ, UK
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Bhattacharjee P, Banerjee M, Giri AK. Role of genomic instability in arsenic-induced carcinogenicity. A review. ENVIRONMENT INTERNATIONAL 2013; 53:29-40. [PMID: 23314041 DOI: 10.1016/j.envint.2012.12.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 12/04/2012] [Accepted: 12/09/2012] [Indexed: 06/01/2023]
Abstract
Exposure to chronic arsenic toxicity is associated with cancer. Although unstable genome is a characteristic feature of cancer cells, the mechanisms leading to genomic instability in arsenic-induced carcinogenesis are poorly understood. While there are excellent reviews relating to genomic instability in general, there is no comprehensive review presenting the mechanisms involved in arsenic-induced genomic instability. This review was undertaken to present the current state of research in this area and to highlight the major mechanisms that may involved in arsenic-induced genomic instability leading to cancer. Genomic instability is broadly classified into chromosomal instability (CIN), primarily associated with mitotic errors; and microsatellite instability (MIN), associated with DNA level instability. Arsenic-induced genomic instability is essentially multi-factorial in nature and involves molecular cross-talk across several cellular pathways, and is modulated by a number of endogenous and exogenous factors. Arsenic and its metabolites generate oxidative stress, which in turn induces genomic instability through DNA damage, irreversible DNA repair, telomere dysfunction, mitotic arrest and apoptosis. In addition to genetic alteration; epigenetic regulation through promoter methylation and miRNA expression alters gene expression profiling leading to genome more vulnerable and unstable towards cancer risk. Moreover, mutations or silencing of pro-apoptotic genes can lead to genomic instability by allowing survival of damaged cells that would otherwise die. Although a large body of information is now generated regarding arsenic-induced carcinogenesis; further studies exploring genome-wide association, role of environment and diet are needed for a better understanding of the arsenic-induced genomic instability.
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Affiliation(s)
- Pritha Bhattacharjee
- Molecular and Human Genetics Division, CSIR-Indian Institute of Chemical Biology, Kolkata-700 032, India
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Baek JH, Moon CH, Cha SJ, Lee HS, Noh EK, Kim H, Won JH, Min YJ. Arsenic trioxide induces depolymerization of microtubules in an acute promyelocytic leukemia cell line. THE KOREAN JOURNAL OF HEMATOLOGY 2012; 47:105-12. [PMID: 22783356 PMCID: PMC3389058 DOI: 10.5045/kjh.2012.47.2.105] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/07/2012] [Accepted: 05/16/2012] [Indexed: 11/19/2022]
Abstract
Background Arsenic trioxide (As2O3) is a well-known and effective treatment that can result in clinical remission for patients diagnosed with acute promyelocytic leukemia (APL). The biologic efficacy of As2O3 in APL and solid tumor cells has been explained through its actions on anti-proliferation, anti-angiogenesis, and apoptotic signaling pathways. We theorize that As2O3 activates a pathway that disrupts microtubule dynamics forming abnormal, nonfunctioning mitotic spindles, thus preventing cellular division. In this study, we investigated how As2O3 induces apoptosis by causing microtubule dysfunction. Methods Cultured NB4 cells were treated with As2O3, paclitaxel, and vincristine. Flow cytometric analysis was then performed. An MTT assay was used to determine drug-mediated cytotoxicity. For tubulin polymerization assay, each polymerized or soluble tubulin was measured. Microtubule assembly-disassembly was measured using a tubulin polymerization kit. Cellular microtubules were also observed with fluorescence microscopy. Results As2O3 treatment disrupted tubulin assembly resulting in dysfunctional microtubules that cause death in APL cells. As2O3 markedly enhanced the amount of depolymerized microtubules. The number of microtubule posttranslational modifications on an individual tubulin decreased with As2O3 concentration. Immunocytochemistry revealed changes in the cellular microtubule network and formation of polymerized microtubules in As2O3-treated cells. Conclusion The microtubules alterations found with As2O3 treatment suggest that As2O3 increases the depolymerized forms of tubulin in cells and that this is potentially due to arsenite's negative effects on spindle dynamics.
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Affiliation(s)
- Jin Ho Baek
- Division of Hematology and Oncology, Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
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Yih LH, Wu YC, Hsu NC, Kuo HH. Arsenic trioxide induces abnormal mitotic spindles through a PIP4KIIγ/Rho pathway. Toxicol Sci 2012; 128:115-25. [PMID: 22496355 DOI: 10.1093/toxsci/kfs129] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Arsenite-induced spindle abnormalities result in mitotic cell apoptosis in several cancer cell lines, but how arsenite induces these effects is not known. Evidence to date has revealed that arsenite activates Rho guanosine triphosphatases (GTPases). Because Rho GTPases regulate spindle orientation, chromosome congression, and cytokinesis, we therefore examined the involvement of Rho GTPases and their modulators in arsenite-induced mitotic abnormalities. We demonstrated that arsenic trioxide (ATO) disrupted the positioning of bipolar mitotic spindles and induced centrosome and spindle abnormalities. ATO increased the level of the active guanosine triphosphate-bound form of Rho. Inhibition of Rho-associated protein kinases (ROCKs) by Y-27632 ameliorated ATO-induced spindle defects, mitotic arrest, and cell death. These results indicate that ATO may induce spindle abnormalities and mitotic cell death through a Rho/ROCK pathway. In addition, screening of a human kinase and phosphatase shRNA library to select genes that mediate ATO induction of spindle abnormalities resulted in the identification of phosphatidylinositol-5-phosphate 4-kinase type-2 gamma (PIP4KIIγ), a phosphatidylinositol 4,5-biphosphate (PIP2) synthesis enzyme that belongs to the phosphatidylinositol phosphate kinase (PIPK) family. Sequestration of PIP2 by ectopic overexpression of the pleckstrin homology domain of phospholipase C-δ1 protected cells from ATO-induced cell death. Furthermore, depletion of PIP4KIIγ, but not other isoforms of the PIPK family, not only reduced Rho GTPase activation in ATO-treated cells but also alleviated ATO-induced spindle defects, mitotic arrest, and mitotic cell apoptosis. Thus, our results imply that ATO induces abnormalities in mitotic spindles through a PIP4KIIγ/Rho pathway, leading to apoptosis of mitotic cells.
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Affiliation(s)
- Ling-Huei Yih
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 115, Taiwan, Republic of China.
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Mason TA, Kolobova E, Liu J, Roland JT, Chiang C, Goldenring JR. Darinaparsin is a multivalent chemotherapeutic which induces incomplete stress response with disruption of microtubules and Shh signaling. PLoS One 2011; 6:e27699. [PMID: 22110729 PMCID: PMC3216988 DOI: 10.1371/journal.pone.0027699] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 10/23/2011] [Indexed: 12/19/2022] Open
Abstract
Chemotherapeutics and other pharmaceuticals are common sources of cellular stress. Darinaparsin (ZIO-101) is a novel organic arsenical under evaluation as a cancer chemotherapeutic, but the drug's precise mechanism of action is unclear. Stress granule formation is an important cellular stress response, but the mechanisms of formation, maintenance, and dispersal of RNA-containing granules are not fully understood. During stress, small, diffuse granules initially form throughout the cytoplasm. These granules then coalesce near the nucleus into larger granules that disperse once the cellular stress is removed. Complete stress granule formation is dependent upon microtubules. Human cervical cancer (HeLa) cells, pre-treated with nocodazole for microtubule depolymerization, formed only small, diffuse stress granules upon sodium arsenite treatment. Darinaparsin, as a single agent, also induced the formation of small, diffuse stress granules, an effect similar to that of the combination of nocodazole with sodium arsenite. Darinaparsin inhibited the polymerization of microtubules both in vivo and in vitro. Interestingly, upon removal of darinaparsin, the small, diffuse stress granules completed formation with coalescence in the perinuclear region prior to disassembly. These results indicate that RNA stress granules must complete formation prior to disassembly, and completion of stress granule formation is dependent upon microtubules. Finally, treatment of cells with darinaparsin led to a reduction in Sonic hedgehog (Shh) stimulated activation of Gli1 and a loss of primary cilia. Therefore, darinaparsin represents a unique multivalent chemotherapeutic acting on stress induction, microtubule polymerization, and Shh signaling.
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Affiliation(s)
- Twila A. Mason
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Elena Kolobova
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Jiang Liu
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Joseph T. Roland
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Chin Chiang
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - James R. Goldenring
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
- * E-mail:
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Vasconsuelo A, Pronsato L, Ronda AC, Boland R, Milanesi L. Role of 17β-estradiol and testosterone in apoptosis. Steroids 2011; 76:1223-31. [PMID: 21855557 DOI: 10.1016/j.steroids.2011.08.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 05/13/2011] [Accepted: 08/03/2011] [Indexed: 12/20/2022]
Abstract
17β-Estradiol (E2) and Testosterone (T) exert actions in most animal tissues, in addition to the reproductive system. Thus, both sex steroid hormones affect growth and different cell functions in several organs. Accordingly, the nuclear estrogen (ER) and androgen (AR) receptors are ubiquitously expressed. Moreover, ER and AR may have non-classical intracellular localizations, e.g. plasma membrane, mitochondria and endoplasmic reticulum, raising additional complexity to the functional roles of E2 and T. In addition to the modulation of gene transcription by direct interaction with their cognate nuclear receptors, the steroids can rapidly activate signaling pathways by a non-genomic mechanism mediated by receptors identical to or different from known steroid receptors. Among various functions, E2 and T can regulate apoptosis through those pathways. In mitochondria, the presence of ER and AR and actions of estrogen and androgen have been shown, in keeping with the organelle being a control point of apoptosis. The most recurrent action for each steroid hormone is the protection of mitochondria against different insults, resulting in antiapoptosis. This review summarizes the molecular basis of the modulation of programmed cell death by E2 and T in several tissues.
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Affiliation(s)
- Andrea Vasconsuelo
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, 8000 Bahía Blanca, Argentina.
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Dizaji MZ, Malehmir M, Ghavamzadeh A, Alimoghaddam K, Ghaffari SH. Synergistic Effects of Arsenic Trioxide and Silibinin on Apoptosis and Invasion in Human Glioblastoma U87MG Cell Line. Neurochem Res 2011; 37:370-80. [DOI: 10.1007/s11064-011-0620-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 08/27/2011] [Accepted: 09/23/2011] [Indexed: 01/08/2023]
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14
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Rovini A, Savry A, Braguer D, Carré M. Microtubule-targeted agents: When mitochondria become essential to chemotherapy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1807:679-88. [DOI: 10.1016/j.bbabio.2011.01.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 01/02/2011] [Accepted: 01/04/2011] [Indexed: 12/22/2022]
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15
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Olesoxime prevents microtubule-targeting drug neurotoxicity: selective preservation of EB comets in differentiated neuronal cells. Biochem Pharmacol 2010; 80:884-94. [PMID: 20417191 DOI: 10.1016/j.bcp.2010.04.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 03/30/2010] [Accepted: 04/15/2010] [Indexed: 01/01/2023]
Abstract
Microtubule-targeting agents (MTAs), anticancer drugs widely used in the clinic, often induce peripheral neuropathy, a main dose-limiting side effect. The mechanism for this neurotoxicity remains poorly understood and there are still no approved therapies for neuropathies triggered by MTAs. Olesoxime (cholest-4-en-3-one, oxime; TRO19622) has shown marked neuroprotective properties in animals treated with paclitaxel and vincristine. The purpose of this study was to investigate its mechanism of neuroprotection against MTA neurotoxicity by using rat and human differentiated neuronal cells. We first showed that olesoxime prevented neurite shrinkage induced by MTAs in differentiated PC-12 and SK-N-SH neuroblastoma cell lines by up to 90%. This neuroprotective effect was correlated with enhanced EB1 accumulation at microtubule plus-ends, increased growth cone microtubule growing rate (20%) and decreased microtubule attenuation duration (54%). The effects of olesoxime on EB comets were specific for differentiated neuronal cells and were not seen either in proliferating neuroblastoma cells, glioblastoma cells or primary endothelial cells. Importantly, olesoxime did not alter MTA cytotoxic properties in a wide range of MTA-sensitive tumor cells, a prerequisite for future clinical application. Finally, olesoxime also counteracted MTA inhibition of microtubule-dependent mitochondria trafficking. These results provide additional insight into the neuroprotective properties of olesoxime, highlighting a role for microtubule dynamics in preservation of neurite architecture and axoplasmic transport, which are both disturbed by MTAs. The neuron-specific protective properties of olesoxime support its further development to treat MTA-induced neuropathy.
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16
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Arsenic induces mitochondria-dependent apoptosis by reactive oxygen species generation rather than glutathione depletion in Chang human hepatocytes. Arch Toxicol 2009; 83:899-908. [DOI: 10.1007/s00204-009-0451-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Accepted: 06/04/2009] [Indexed: 10/20/2022]
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17
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Duan Q, Komissarova E, Dai W. Arsenic trioxide suppresses paclitaxel-induced mitotic arrest. Cell Prolif 2009; 42:404-11. [PMID: 19397590 DOI: 10.1111/j.1365-2184.2009.00606.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES To understand if there exists a functional interaction between arsenic trioxide and paclitaxel in vitro. MATERIALS AND METHODS HeLa and HCT116 (rho53(+/+) and rho53(-/-)) cells were treated with As2O3 and/or paclitaxel for various times. Treated cells were collected for analyses using a combination of flow cytometry, fluorescence microscopy and Western blotting. RESULTS Because As(2)O(3) is capable of inhibiting tubulin polymerization and inducing mitotic arrest, we examined whether there existed any functional interaction between As(2)O(3) and paclitaxel, a well-known microtubule poison. Flow cytometry and fluorescence microscopy revealed that although As(2)O(3) alone caused a moderate level of mitotic arrest, it greatly attenuated paclitaxel-induced mitotic arrest in cells with p53 deficiency. Western blot analysis showed that As(2)O(3) significantly blocked phosphorylation of BubR1, Cdc20, and Cdc27 in cells treated with paclitaxel, suggesting that arsenic compromised the activation of the spindle checkpoint. Our further studies revealed that the attenuation of paclitaxel-induced mitotic arrest by As(2)O(3) resulted primarily from sluggish cell cycle progression at S phase but not enhanced mitotic exit. CONCLUSION The observations that As(2)O(3) has a negative impact on the cell cycle checkpoint activation by taxol should have significant clinical implications because the efficacy of taxol in the clinics is associated with its ability to induce mitotic arrest and subsequent mitotic catastrophe.
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Affiliation(s)
- Q Duan
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
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18
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Iuchi K, Akagi K, Yagura T. Heterocyclic Organobismuth(III) Compound Targets Tubulin to Induce G2/M Arrest in HeLa Cells. J Pharmacol Sci 2009; 109:573-82. [DOI: 10.1254/jphs.09020fp] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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19
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Taylor BF, McNeely SC, Miller HL, States JC. Arsenite-induced mitotic death involves stress response and is independent of tubulin polymerization. Toxicol Appl Pharmacol 2008; 230:235-46. [PMID: 18485433 DOI: 10.1016/j.taap.2008.02.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Revised: 02/21/2008] [Accepted: 02/25/2008] [Indexed: 10/22/2022]
Abstract
Arsenite, a known mitotic disruptor, causes cell cycle arrest and cell death at anaphase. The mechanism causing mitotic arrest is highly disputed. We compared arsenite to the spindle poisons nocodazole and paclitaxel. Immunofluorescence analysis of alpha-tubulin in interphase cells demonstrated that, while nocodazole and paclitaxel disrupt microtubule polymerization through destabilization and hyperpolymerization, respectively, microtubules in arsenite-treated cells remain comparable to untreated cells even at supra-therapeutic concentrations. Immunofluorescence analysis of alpha-tubulin in mitotic cells showed spindle formation in arsenite- and paclitaxel-treated cells but not in nocodazole-treated cells. Spindle formation in arsenite-treated cells appeared irregular and multi-polar. gamma-tubulin staining showed that cells treated with nocodazole and therapeutic concentrations of paclitaxel contained two centrosomes. In contrast, most arsenite-treated mitotic cells contained more than two centrosomes, similar to centrosome abnormalities induced by heat shock. Of the three drugs tested, only arsenite treatment increased expression of the inducible isoform of heat shock protein 70 (HSP70i). HSP70 and HSP90 proteins are intimately involved in centrosome regulation and mitotic spindle formation. HSP90 inhibitor 17-DMAG sensitized cells to arsenite treatment and increased arsenite-induced centrosome abnormalities. Combined treatment of 17-DMAG and arsenite resulted in a supra-additive effect on viability, mitotic arrest, and centrosome abnormalities. Thus, arsenite-induced abnormal centrosome amplification and subsequent mitotic arrest is independent of effects on tubulin polymerization and may be due to specific stresses that are protected against by HSP90 and HSP70.
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Affiliation(s)
- B Frazier Taylor
- Department of Pharmacology and Toxicology, Center for Environmental Genomics and Integrative Biology, Center for Genetics and Molecular Medicine, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
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Binet F, Chiasson S, Girard D. Arsenic trioxide induces de novo protein synthesis of annexin-1 in neutrophils: association with a heat shock-like response and not apoptosis. Br J Haematol 2008; 140:454-63. [DOI: 10.1111/j.1365-2141.2007.06941.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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21
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Gan PP, Pasquier E, Kavallaris M. Class III beta-tubulin mediates sensitivity to chemotherapeutic drugs in non small cell lung cancer. Cancer Res 2007; 67:9356-63. [PMID: 17909044 DOI: 10.1158/0008-5472.can-07-0509] [Citation(s) in RCA: 174] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
First line therapy for non-small cell lung carcinoma (NSCLC) commonly includes combination therapy with a tubulin-binding agent (TBA) and a DNA-damaging agent. TBAs suppress microtubule dynamics by binding to the beta-tubulin subunit of alpha/beta-tubulin, inducing mitotic arrest and apoptosis. Up-regulation of class III beta-tubulin (betaIII-tubulin) has been implicated in clinical resistance in NSCLC, ovarian and breast tumors treated in combination with a TBA and DNA-damaging agent. To investigate the functional significance of betaIII-tubulin in resistance to both these classes of agents, small interfering RNA (siRNA) was used to silence the expression of this isotype in two NSCLC cell lines, NCI-H460 and Calu-6. Reverse transcription-PCR and immunoblotting showed that betaIII-siRNA potently inhibited the expression of betaIII-tubulin, without affecting the expression of other major beta-tubulin isotypes. Clonogenic assays showed that betaIII-siRNA cells were significantly more sensitive to TBAs, paclitaxel, vincristine, and vinorelbine, and for the first time, DNA-damaging agents, cisplatin, doxorubicin, and etoposide compared with controls. Cell cycle analysis of H460 betaIII-siRNA cells showed reduced accumulation at the G(2)-M boundary and an increase in the sub-G(1) population in response to TBA treatment compared with control cells. Importantly, betaIII-siRNA cells displayed a significant dose-dependent increase in Annexin V staining when treated with either paclitaxel or cisplatin, compared with controls. These findings have revealed a novel role for betaIII-tubulin in mediating response to both TBA and DNA-damaging agent therapy and may have important implications for improving the targeting and treatment of drug-refractory NSCLC.
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Affiliation(s)
- Pei Pei Gan
- Children's Cancer Institute Australia for Medical Research, Randwick, New South Wales, Australia
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22
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Yi H, Wu L, Jiang L. Genotoxicity of arsenic evaluated by Allium-root micronucleus assay. THE SCIENCE OF THE TOTAL ENVIRONMENT 2007; 383:232-6. [PMID: 17574654 DOI: 10.1016/j.scitotenv.2007.05.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Revised: 05/11/2007] [Accepted: 05/16/2007] [Indexed: 05/15/2023]
Abstract
Arsenic exposure is associated with various diseases and cancers. By using Allium-root micronucleus (MN) assay, possible genotoxicity of sodium arsenite (0.3-100 mg/l) and arsenic trioxide (0.05-50 mg/l) was evaluated in this study. Our results showed that arsenic compounds induced MN formation concentration-dependently. Exposure to 0.5-20 mg/l arsenic trioxide or to 1-100 mg/l sodium arsenite caused MN significantly in meristematic cells and daughter cells of Allium roots. A time-course study revealed that MN increased significantly after a short term (1 h) exposure to 10 mg/l sodium arsenite, demonstrating an effective rapid response. Arsenic compounds also caused mitotic delay and a concentration-dependent decrease in mitotic index. Results of the present study suggest that Allium-root MN assay is a simple, efficient and reproducible method for the genotoxicity monitoring of arsenic water contamination.
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Affiliation(s)
- Huilan Yi
- College of Life Science and Technology, Shanxi University, Taiyuan, China.
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23
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Estève MA, Carré M, Bourgarel-Rey V, Kruczynski A, Raspaglio G, Ferlini C, Braguer D. Bcl-2 down-regulation and tubulin subtype composition are involved in resistance of ovarian cancer cells to vinflunine. Mol Cancer Ther 2007; 5:2824-33. [PMID: 17121929 DOI: 10.1158/1535-7163.mct-06-0277] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vinflunine, a new microtubule-targeting drug, has a marked antitumor activity in vitro and in vivo. Here, we studied the mechanisms mediating resistance to vinflunine. We investigated the response to vinflunine of ovarian cancer cells initially selected as paclitaxel-resistant cells (A2780-TC1 cells). By comparison with A2780-wild-type (wt) cells, we showed that A2780-TC1 cells were highly resistant to vinflunine, with resistance factors reaching 800 and 1,830 for IC(50) and IC(70), respectively. We showed that P-glycoprotein minimally participated in this cell resistance. The examination of tubulin composition revealed increased levels of acetylated alpha-tubulin, betaII-tubulin, and betaIII-tubulin in A2780-TC1 cells before vinflunine treatment. As a consequence, vinflunine unequally affected microtubule network organization and function in A2780-wt and A2780-TC1 cells. Whereas the drug depolymerized microtubules and induced a mitotic block in A2780-wt cells, it did not depolymerize microtubules and induced a G(2) block in A2780-TC1 cells. Elsewhere, the mitochondrial protein Bcl-2 was down-regulated in A2780-TC1 cells. This down-regulation was related to resistance, as A2780-TC1 cells stably transfected with a Bcl-2 construct recovered a partial sensitivity to vinflunine. Lastly, we confirmed the role played by Bcl-2 by showing that the mitochondrial membrane potential was only disrupted by vinflunine in cells expressing Bcl-2. Altogether, our results indicate that modifications acquired during treatment (i.e., paclitaxel) have significant consequences on cell response to the following drug (i.e., vinflunine). Especially, this study shows that a specific pool of tubulin subtypes and a down-regulation of Bcl-2 are associated with resistance of ovarian cancer cells to vinflunine.
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Affiliation(s)
- Marie-Anne Estève
- Centre National de la Recherche Scientifique, Formation de Recherche en Evolution 2737, UFR Pharmacie, 27 Boulevard Jean Moulin, 13005 Marseille, France
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24
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Nonaka M, Ikeda H, Fujisawa A, Uehara M, Inokuchi T. Induction of apoptosis by paclitaxel in human oral carcinoma cells. Int J Oral Maxillofac Surg 2006; 35:649-52. [PMID: 16513327 DOI: 10.1016/j.ijom.2006.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Revised: 08/19/2005] [Accepted: 01/16/2006] [Indexed: 11/24/2022]
Abstract
The present study investigated induction of apoptosis in NB-1 oral carcinoma cells by paclitaxel and the expression of Bcl-2 and Bax in relation to this apoptotic cell death. Paclitaxel induced apoptotic cell death in NB-1 cells in a dose- and a time-dependent manner. The present results suggest that paclitaxel can induce apoptosis of NB-1 cells, which may be mediated by down-regulation of Bcl-2 together with up-regulation of Bax.
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Affiliation(s)
- M Nonaka
- Department of Developmental and Reconstructive Medicine, Division of Oral & Maxillofacial Surgical Reconstruction and Functional Restoration, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan.
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25
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Binet F, Cavalli H, Moisan E, Girard D. Arsenic trioxide (AT) is a novel human neutrophil pro-apoptotic agent: effects of catalase on AT-induced apoptosis, degradation of cytoskeletal proteins and de novo protein synthesis. Br J Haematol 2006; 132:349-58. [PMID: 16409300 DOI: 10.1111/j.1365-2141.2005.05866.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The anti-cancer drug arsenic trioxide (AT) induces apoptosis in a variety of transformed or proliferating cells. However, little is known regarding its ability to induce apoptosis in terminally differentiated cells, such as neutrophils. Because neutropenia has been reported in some cancer patients after AT treatment, we hypothesised that AT could induce neutrophil apoptosis, an issue that has never been investigated. Herein, we found that AT-induced neutrophil apoptosis and gelsolin degradation via caspases. AT did not increase neutrophil superoxide production and did not induce mitochondrial generation of reactive oxygen species. AT-induced apoptosis in PLB-985 and X-linked chronic granulomatous disease (CGD) cells (PLB-985 cells deficient in gp91(phox) mimicking CGD) at the same potency. Addition of catalase, an inhibitor of H2O2, reversed AT-induced apoptosis and degradation of the cytoskeletal proteins gelsolin, alpha-tubulin and lamin B1. Unexpectedly, AT-induced de novo protein synthesis, which was reversed by catalase. Cycloheximide partially reversed AT-induced apoptosis. We conclude that AT induces neutrophil apoptosis by a caspase-dependent mechanism and via de novo protein synthesis. H2O2 is of major importance in AT-induced neutrophil apoptosis but its production does not originate from nicotinamide adenine dinucleotide phosphate dehydrogenase activation and mitochondria. Cytoskeletal structures other than microtubules can now be considered as novel targets of AT.
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Affiliation(s)
- François Binet
- INRS-Institut Armand-Frappier, Université du Québec, Pointe-Claire, PQ, Canada
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26
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Kuo HC, Lee HJ, Hu CC, Shun HI, Tseng TH. Enhancement of esculetin on Taxol-induced apoptosis in human hepatoma HepG2 cells. Toxicol Appl Pharmacol 2006; 210:55-62. [PMID: 16051289 DOI: 10.1016/j.taap.2005.06.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2005] [Revised: 06/14/2005] [Accepted: 06/21/2005] [Indexed: 11/16/2022]
Abstract
The potential use of low dose chemotherapy has been appealing since lower dosages are more attainable during cancer therapy and cause less toxicity in patients. Combination therapy of Taxol, a promising frontline chemotherapy agent, with natural anti-tumor agents that are considerably less toxic with a capability of activating additional apoptotic signals or inhibiting survival signals may provide a rational molecular basis for novel chemotherapeutic strategies. Esculetin, a well-known lipoxygenase inhibitor, showed an inhibitory effect on the cell cycle progression of HL-60 cells in our previous study. In this report, the effects of a concomitant administration of esculetin and Taxol were investigated in human hepatoma HepG2 cells. Firstly, esculetin alone could exert an antiproliferation effect together with an inhibitory effect on the activation of ERKs and p38 MAPK. As compared to the treatment with Taxol only, a co-administration with esculetin and Taxol could result in a further enhancement of apoptosis as revealed by DNA fragmentation assay and Annexin-V-based assay. Meanwhile, immunoblotting analysis also showed that the co-administration of esculetin and Taxol could increase the expression of Bax and the cytosolic release of cytochrome C and enhance the expression of Fas and Fas ligand while the activation of caspase-8 and caspase-3 was also increased. Finally, the ERK cascade was proven to be involved in the enhancement of esculetin on the Taxol-induced apoptosis.
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Affiliation(s)
- Hsing-Chun Kuo
- Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Chien Kuo N. Road, Taichung 402, Taiwan
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27
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André N, Rome A, Carré M. [Antimitochondrial agents: a new class of anticancer agents]. Arch Pediatr 2005; 13:69-75. [PMID: 16298120 DOI: 10.1016/j.arcped.2005.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Accepted: 10/01/2005] [Indexed: 11/15/2022]
Abstract
Over the last 2 decades, the role of apoptosis in anticancer agent cytotoxicity has become clear. Defects in the regulation of apoptosis (programmed cell death) make important contributions to the pathogenesis and progression of most cancers and leukemias. Apoptosis defects also have a key role in cell resistance to chemotherapy. Mitochondria play a central part in cell death in response to anticancer agents. Most of these agents target mitochondria via caspases or other regulator elements of the apoptotic machinery. Nevertheless, some anticancer agents, already in clinical use (paclitaxel, vinblastine, lonidamine, etoposide, arsenic trioxide) or in pre-clinical development (betulinic acid, MT21), directly target and permeabilize mitochondria. The acknowledgement of mitochondria as a new target for anticancer agents provides a new way to bypass cancer cell chemoresistance.
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Affiliation(s)
- N André
- Service d'oncologie pédiatrique, EA3286, hôpital pour enfants de la Timone, 13005 Marseille, France.
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28
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Kligerman AD, Doerr CL, Tennant AH. Oxidation and methylation status determine the effects of arsenic on the mitotic apparatus. Mol Cell Biochem 2005; 279:113-21. [PMID: 16283520 DOI: 10.1007/s11010-005-8283-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We investigated the spindle inhibitory properties of six arsenicals differing in their methylation or oxidation state. Human lymphoblasts were exposed for 6 h to either sodium arsenate (NaAs(V)), sodium arsenite (NaAs(III)), monomethylarsonic acid (MMA(V)), monomethylarsonous acid (MMA(III)), dimethylarsinic acid (DMA(V)), or dimethylarsinous acid (DMA(III)). After exposure slides were prepared, and the mitotic indices (MI) were assessed. We also exposed tubulin directly to each arsenical and spectrophotometrically measured its effect on polymerization. NaAs(V) caused a small but significant increase in MI. MMA(V) also caused only a slight increase in MI that just reached statistical significance. In contrast, DMA(V) caused a significant increase in MI, producing approximately 75% the MI of demecolcine and approximately 4 times the MI of the control. NaAs(III) had no significant effect on MI and was quite toxic. MMA(III) induced more than a twofold increase in MI compared to the control, which was about 40% that caused by demecolcine. On a micromolar basis, MMA(III) was the most potent of the arsenicals tested. DMA(III) gave inconsistent results. None of the pentavalent arsenicals had a substantial effect (either inhibition or enhancement) on GTP-induced polymerization of tubulin. In contrast, NaAs(III) inhibited polymerization at concentrations of 1 mM and above and MMA(III) and DMA(III) at 10 microM and above. Taken together, these results present a complex picture of how arsenicals may affect cells. These studies demonstrate that the metabolites of arsenic are active not only as chromosome breaking and DNA damaging agents but can also interfere with cell division via tubulin disruption.
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Affiliation(s)
- A D Kligerman
- Environmental Carcinogenesis Division, National Health and Environmental Effects Research Laboratory, US Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA.
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29
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de Mareuil J, Carre M, Barbier P, Campbell GR, Lancelot S, Opi S, Esquieu D, Watkins JD, Prevot C, Braguer D, Peyrot V, Loret EP. HIV-1 Tat protein enhances microtubule polymerization. Retrovirology 2005; 2:5. [PMID: 15691386 PMCID: PMC549075 DOI: 10.1186/1742-4690-2-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2004] [Accepted: 02/03/2005] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND HIV infection and progression to AIDS is characterized by the depletion of T cells, which could be due, in part, to apoptosis mediated by the extra-cellular HIV-encoded Tat protein as a consequence of Tat binding to tubulin. Microtubules are tubulin polymers that are essential for cell structure and division. Molecules that target microtubules induce apoptosis and are potent anti-cancer drugs. We studied the effect on tubulin polymerization of three Tat variants: Tat HxB2 and Tat Eli from patients who are rapid progressors (RP) and Tat Oyi from highly exposed but persistently seronegative (HEPS) patients. We compared the effect on tubulin polymerization of these Tat variants and peptides corresponding to different parts of the Tat sequence, with paclitaxel, an anti-cancer drug that targets microtubules. RESULTS We show that Tat, and specifically, residues 38-72, directly enhance tubulin polymerization. We demonstrate that Tat could also directly trigger the mitochondrial pathway to induce T cell apoptosis, as shown in vitro by the release of cytochrome c from isolated mitochondria. CONCLUSIONS These results show that Tat directly acts on microtubule polymerization and provide insights into the mechanism of T cell apoptosis mediated by extra-cellular Tat.
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Affiliation(s)
- Jean de Mareuil
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Manon Carre
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Pascale Barbier
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Grant R Campbell
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Sophie Lancelot
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Sandrine Opi
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Didier Esquieu
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Jennifer D Watkins
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Charles Prevot
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Diane Braguer
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Vincent Peyrot
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
| | - Erwann P Loret
- UMR Univ. Med./CNRS FRE 2737, Faculté de Pharmacie, Université de la Méditerranée, 27 Bd Jean Moulin, 13385 Marseille, France
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30
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Karlsson J, Øra I, Pörn-Ares I, Påhlman S. Arsenic trioxide-induced death of neuroblastoma cells involves activation of Bax and does not require p53. Clin Cancer Res 2004; 10:3179-88. [PMID: 15131059 DOI: 10.1158/1078-0432.ccr-03-0309] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
PURPOSE On the basis of clinical studies showing that arsenic trioxide (As(2)O(3)), via an apoptotic mechanism, and with minimal toxicity induces complete remission in patients with refractory acute promyelocytic leukemia and that multidrug-resistant and p53-mutated neuroblastoma cells are sensitive to As(2)O(3) both in vitro and in vivo, we searched for molecular mechanisms involved in the As(2)O(3)-induced neuroblastoma cell death. EXPERIMENTAL DESIGN We have studied the effect of As(2)O(3) on the expression and cellular localization of proteins involved in drug-induced death in two neuroblastoma cell lines with intact p53 and two with mutated p53, the latter two displaying multidrug resistance. RESULTS As(2)O(3) provoked Bax expression in all tested neuroblastoma cell lines, including SK-N-BE(2) cells with mutated p53 and LA-N-1 cells, which have a deleted p53. In all cell lines exposed to As(2)O(3), p21 Bax was proteolytically cleaved in a calpain-dependent way into the more proapoptotic p18 Bax, which was detected exclusively in a mitochondria-enriched subcellular fraction. As(2)O(3) also caused an increase of cytoplasmic cytochrome c, translocation of antiapoptosis-inducing factor to the nuclei, and a slight activation of caspase 3. However, inhibition of caspase 3 did not prevent cell death, whereas inhibition of Bax cleavage was associated with a decreased As(2)O(3)-induced cell death. CONCLUSIONS We show that multidrug-resistant neuroblastoma cells die after exposure to As(2)O(3), independent of functional p53, suggesting activation of a cytotoxic pathway different from that induced by conventional chemotherapeutic agents. We further propose that proteolytic activation of Bax is an important event in As(2)O(3)-induced cell death.
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Affiliation(s)
- Jenny Karlsson
- Division of Molecular Medicine, Department of Laboratory Medicine, University Hospital, Malmö, Sweden
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31
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Pasquier E, Carré M, Pourroy B, Camoin L, Rebaï O, Briand C, Braguer D. Antiangiogenic activity of paclitaxel is associated with its cytostatic effect, mediated by the initiation but not completion of a mitochondrial apoptotic signaling pathway. Mol Cancer Ther 2004. [DOI: 10.1158/1535-7163.1301.3.10] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Angiogenesis is a critical event in tumor growth and metastasis, which can be inhibited by conventional anticancer drugs such as the microtubule-damaging agent paclitaxel (Taxol). In this study, we investigate the mechanism of action of paclitaxel on human endothelial cells. We characterize two distinct effects of paclitaxel on human umbilical vein endothelial cell and human microvascular endothelial cell-1 proliferation according to drug concentration: a cytostatic effect at low concentrations and a cytotoxic effect at concentrations 10 nmol/L. The cytotoxic effect involves signaling pathways similar to those described in tumor cells (i.e., microtubule network disturbance, G2-M arrest, increase in Bax/Bcl-2 ratio, and mitochondria permeabilization) that result in apoptosis. In sharp contrast, the cytostatic effect involves an inhibition of endothelial cell proliferation without apoptosis induction and without any structural modification of the microtubule network. This cytostatic effect is due to a slowing of the cell cycle rather than to an arrest in a specific phase of the cell cycle. In addition, paclitaxel, at cytostatic concentrations, early initiates an apoptotic signaling pathway associated with increases in the mitochondrial reducing potential, mitochondrial membrane potential, p53 expression, and Bax/Bcl-2 ratio. However, this apoptotic pathway is stopped upstream of mitochondria permeabilization and it does not lead to endothelial cell death. Finally, we found that paclitaxel inhibits endothelial cell morphogenesis on Matrigel at all tested concentrations. In conclusion, we describe the mechanism of action of low concentrations of paclitaxel related to the antiangiogenic properties of this drug.
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Affiliation(s)
- Eddy Pasquier
- 1FRE-Centre National de la Recherche Scientifique 2737, ISPDCT,
| | - Manon Carré
- 1FRE-Centre National de la Recherche Scientifique 2737, ISPDCT,
| | | | - Laurence Camoin
- 2UMR Institut National de la Sante et de la Recherche Medicale 608, and
| | - Ouafa Rebaï
- 3Institut National de la Sante et de la Recherche Medicale 559, Université de la Méditerranée, Marseille, France
| | | | - Diane Braguer
- 1FRE-Centre National de la Recherche Scientifique 2737, ISPDCT,
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32
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Mercado-Gómez O, Ferrera P, Arias C. Histopathologic changes induced by the microtubule-stabilizing agent Taxol in the rat hippocampus in vivo. J Neurosci Res 2004; 78:553-62. [PMID: 15449327 DOI: 10.1002/jnr.20264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Microtubules and their associated proteins play a prominent role in neuronal morphology, axonal transport, neuronal plasticity, and neuronal degeneration. It has been proposed that microtubule damage is sufficient to induce neuronal death. In this regard, the microtubule-stabilizing agent Taxol could be a useful tool to reproduce some aspects of neurodegenerative diseases associated with disturbances of the cytoskeleton and alterations in axonal transport. Although differential effects of Taxol on neuronal viability have been found in vitro, Taxol toxicity in the central nervous system remains to be addressed. We studied the effects of Taxol on neuronal morphology and viability as well as changes in microtubule-associated proteins MAP2 and tau in rat hippocampus. Our results show that Taxol induces dose-dependent neuronal death accompanied by the loss of MAP2 and the presence of dystrophic neurites. Interestingly paired helical filament (PHF)-1 immunoreactivity, which is associated with a phosphorylated epitope of tau proteins, was induced in the damaged hippocampus. Our results suggest that microtubule dynamics have a role in maintenance of neuronal morphology and survival in vivo, and that modifications in microtubule dynamics, may alter the content and neuronal distribution of MAP2 and promote alterations in the phosphorylation state of tau.
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Affiliation(s)
- Octavio Mercado-Gómez
- Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, México
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33
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Campbell GR, Pasquier E, Watkins J, Bourgarel-Rey V, Peyrot V, Esquieu D, Barbier P, de Mareuil J, Braguer D, Kaleebu P, Yirrell DL, Loret EP. The glutamine-rich region of the HIV-1 Tat protein is involved in T-cell apoptosis. J Biol Chem 2004; 279:48197-204. [PMID: 15331610 DOI: 10.1074/jbc.m406195200] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Human immunodeficiency virus (HIV) infection and the progression to AIDS are characterized by the depletion of CD4(+) T-cells. HIV-1 infection leads to apoptosis of uninfected bystander cells and the direct killing of HIV-infected cells. This is mediated, in part, by the HIV-1 Tat protein, which is secreted by virally infected cells and taken up by uninfected cells. We chemically synthesized two 86-residue subtype D Tat proteins, Ug05RP and Ug11LTS, from two Ugandan patients who were clinically categorized as either rapid progressor or long-term survivor, with non-conservative mutations located essentially in the glutamine-rich region. Structural heterogeneities were revealed by CD, which translate into differing trans-activational and apoptotic effects. CD data analysis and molecular modeling indicated that the short alpha-helix observed in subtype D Tat proteins from rapid progressor patients such as Tat Mal and Tat Ug05RP is not present in Ug11LTS. We show that Tat Ug05RP is more efficient than Tat Ug11LTS in its trans-activational role and in inducing apoptosis in binding tubulin via the mitochondrial pathway. The glutamine-rich region of Tat appears to be involved in the Tat-mediated apoptosis of T-cells.
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Affiliation(s)
- Grant R Campbell
- CNRS Formation de Recherche en Evolution 2737, Faculté de Pharmacie, Université de la Méditerranée, 27, Boulevard Jean Moulin, 13385 Marseille, France
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34
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Honore S, Kamath K, Braguer D, Horwitz SB, Wilson L, Briand C, Jordan MA. Synergistic suppression of microtubule dynamics by discodermolide and paclitaxel in non-small cell lung carcinoma cells. Cancer Res 2004; 64:4957-64. [PMID: 15256469 DOI: 10.1158/0008-5472.can-04-0693] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Discodermolide is a new microtubule-targeted antimitotic drug in Phase I clinical trials that, like paclitaxel, stabilizes microtubule dynamics and enhances microtubule polymer mass in vitro and in cells. Despite their apparently similar binding sites on microtubules, discodermolide acts synergistically with paclitaxel to inhibit proliferation of A549 human lung cancer cells (L. Martello et al., Clin. Cancer Res., 6: 1978-1987, 2000). To understand their synergy, we examined the effects of the two drugs singly and in combination in A549 cells and found that, surprisingly, their antiproliferative synergy is related to their ability to synergistically inhibit microtubule dynamic instability and mitosis. The combination of discodermolide and paclitaxel at their antiproliferative IC(50)s (7 nm for discodermolide and 2 nm for paclitaxel) altered all of the parameters of dynamic instability synergistically except the time-based rescue frequency. For example, together the drugs inhibited overall microtubule dynamicity by 71%, but each drug individually inhibited dynamicity by only 24%, giving a combination index (CI) of 0.23. Discodermolide and paclitaxel also synergistically blocked cell cycle progression at G(2)-M (41, 9.6, and 16% for both drugs together, for discodermolide alone, and for paclitaxel alone, respectively; CI = 0.59), and they synergistically enhanced apoptosis (CI = 0.85). Microtubules are unique receptors for drugs. The results suggest that ligands that bind to large numbers of binding sites on an individual microtubule can interact in a poorly understood manner to synergistically suppress microtubule dynamic instability and inhibit both mitosis and cell proliferation, with important consequences for combination clinical therapy with microtubule-targeted drugs.
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Affiliation(s)
- Stéphane Honore
- FRE-CNRS 2737, Université de la Méditerranée, Marseille, France
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35
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Solary E, Bettaieb A, Dubrez-Daloz L, Corcos L. Mitochondria as a target for inducing death of malignant hematopoietic cells. Leuk Lymphoma 2003; 44:563-74. [PMID: 12769332 DOI: 10.1080/1042819021000038001] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Mitochondria plays a central role in apoptotic cell death. The intermembrane space of mitochondria contains a number of soluble molecules whose release from the organelle to the cytosol or the nucleus induces cell death. Thus, molecules that directly trigger mitochondria membrane permeabilisation are efficient cytotoxic drugs. Mitochondria is one of the cellular targets for commonly used epipodophyllotoxins, adenine deoxynucleoside analogs and taxanes as well as recently developped agents such as the pentacyclic triterpene betulinic acid and the lymphotoxic agent FTY720. Most informations on anthracyclines point to the mitochondrial membrane as the main target of cardiotoxicity. Mitochondria is also a target for arsenite trioxide, an old cytotoxic agent recently used for treating acute promyelocytic leukemia, lonidamine, a dichlorinated derivative of indazole-3-carboxylic acid developped as a chemosensitizer, the retinoic acid receptor gamma activator CD437 and nitric oxide (NO). Recently, cytotoxic drugs have been specifically designed to directly affect the mitochondrial function. These include the positively charged alpha-helical peptides, which are attracted to and disrupt the negatively charged mitochondrial membrane, thus inducing mammalian cell apoptosis when targeted intracellularly. Various strategies have been proposed also to directly inhibit Bcl-2 and related anti-apoptotic proteins, including antisense oligonucleotides (e.g. Genasense, currently tested in phase III trials), small molecules that mimic the BH3 dimerization domain of these proteins and kinase inhibitors. Ligands of the mitochondrial benzodiazepine receptor such as the isoquinolone carboxamide derivative PK11195 also overcome the membrane-stabilizing effect of Bcl-2, whereas the adenosine nucleotide translocator (ANT) and the mitochondrial DNA are two other potential cellular targets for cytotoxic agents. Potentially, new compounds directly targeting the mitochondria may be useful in treating hematological malignancies. The challenge is now to selectively target these mitochondria permeabilizing agents to malignant cells. This review briefly summarizes the role of the mitochondria in cell death and describes these various strategies for targeting the mitochondria to induce apoptosis.
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Affiliation(s)
- Eric Solary
- INSERM U517, IFR 100, 7 boulevard Jeanne d'Arc, 21000 Dijon, France.
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36
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Abstract
AIM: To investigate the apoptosis in gastric cancer cells induced by paclitaxel, and the relation between this apoptosis and expression of Bcl-2 and Bax.
METHODS: In in vitro experiments, MTT assay was used to determine the cell growth inhibitory rate. Transmission electron microscope and TUNEL staining method were used to quantitatively and qualitively detect the apoptosis status of gastric cancer cell line SGC-7901 before and after the paclitaxel treatment. Immunohistochemical staining was used to detect the expression of apoptosis-regulated gene Bcl-2 and Bax.
RESULTS: Paclitaxel inhibited the growth of gastric cancer cell line SGC-7901 in a dose-and time-dependent manner. Paclitaxel induced SGC-7901 cells to undergo apoptosis with typically apoptotic characteristics, including morphological changes of chromatin condensation, chromatin crescent formation, nucleus fragmentation and apoptotic body formation. Paclitaxel could reduce the expression of apoptosis-regulated gene Bcl-2, and improve the expression of apoptosis-regulated gene Bax.
CONCLUSION: Paclitaxel is able to induce the apoptosis in gastric cancer. This apoptosis may be mediated by down-expression of apoptosis-regulated gene Bcl-2 and up-expression of apoptosis-regulated gene Bax.
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Affiliation(s)
- Hai-Bo Zhou
- Department Of Gastroenterology, Shandong Provincial Hospital, Jinan 250052, Shandong Province, China.
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37
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Gortzi O, Antimisiaris SG, Klepetsanis P, Papadimitriou E, Ioannou PV. Arsonoliposomes: effect of arsonolipid acyl chain length and vesicle composition on their toxicity towards cancer and normal cells in culture. Eur J Pharm Sci 2003; 18:175-83. [PMID: 12594011 DOI: 10.1016/s0928-0987(02)00259-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Arsonolipid-containing liposomes were investigated in order to characterize the influence of the lipid acyl-chain length and liposome composition on cytotoxicity. Three types of cancer cells (HL-60, C6 and GH3), and two types of normal cells (HUVEC and RAME) were used. Liposomes containing the lauroyl, myristoyl and stearoyl side chain arsonolipids (with different lipid compositions) were incubated with a given number of cells and cell viability was estimated (MTT assay and trypan blue exclusion). Morphological studies were also performed in some cases. In addition, the interaction between some of the prepared arsonoliposomes and HUVEC cells was assessed. Results reveal that all the studied arsonoliposomes cause a dose dependent inhibition of survival in all three malignant cell lines studied (initiated at 10(-6) M). The corresponding toxicity against normal cells (HUVEC and RAME) is much lower for all arsonoliposomes, except for the lauroyl side chain arsonoliposomes which were demonstrated to be relatively toxic towards normal cells, especially RAME. The microscopic observations that these vesicles possibly cause apoptosis of most cell types studied, as well as the different speed of their cytotoxic activity, imply a different mechanism of action for this arsonoliposome type. Taking the results of this study in conjunction with our previous results on arsonoliposome physical stability and cytotoxicity, it is recommended that palmitoyl-arsonolipid arsonoliposomes be used for further investigations in vivo towards the development of an anticancer product.
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Affiliation(s)
- Olga Gortzi
- Department of Pharmacy, University of Patras, Rio 26500, Patras, Greece
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38
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André N, Carré M, Brasseur G, Pourroy B, Kovacic H, Briand C, Braguer D. Paclitaxel targets mitochondria upstream of caspase activation in intact human neuroblastoma cells. FEBS Lett 2002; 532:256-60. [PMID: 12459501 DOI: 10.1016/s0014-5793(02)03691-8] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We previously reported that paclitaxel acted directly on mitochondria isolated from human neuroblastoma SK-N-SH cells. Here, we demonstrate that the direct mitochondrial effect of paclitaxel observed in vitro is relevant in intact SK-N-SH cells. After a 2 h incubation with 1 microM paclitaxel, the mitochondria were less condensed. Paclitaxel (1 microM, 1-4 h) also induced a 20% increase in respiration rate and a caspase-independent production of reactive oxygen species by mitochondria. The paclitaxel-induced release of cytochrome c was detected only after 24 h of incubation, was caspase-independent and permeability transition pore-dependent. Thus, paclitaxel targets mitochondria upstream of caspase activation, early during the apoptotic process in intact human neuroblastoma cells.
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Affiliation(s)
- Nicolas André
- UMR 6032, University of la Méditerranée, UFR of Pharmacy, 27 Bd Jean Moulin, 13005 Marseille, France
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Carré M, André N, Carles G, Borghi H, Brichese L, Briand C, Braguer D. Tubulin is an inherent component of mitochondrial membranes that interacts with the voltage-dependent anion channel. J Biol Chem 2002; 277:33664-9. [PMID: 12087096 DOI: 10.1074/jbc.m203834200] [Citation(s) in RCA: 217] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We have previously reported that anti-tubulin agents induce the release of cytochrome c from isolated mitochondria. In this study, we show that tubulin is present in mitochondria isolated from different human cancerous and non-cancerous cell lines. The absence of polymerized microtubules and cytosolic proteins was checked to ensure that this tubulin is an inherent component of the mitochondria. In addition, a salt wash did not release the tubulin from the mitochondria. By using electron microscopy, we then showed that tubulin is localized in the mitochondrial membranes. As compared with cellular tubulin, mitochondrial tubulin is enriched in acetylated and tyrosinated alpha-tubulin and is also enriched in the class III beta-tubulin isotype but contains very little of the class IV beta-tubulin isotype. The mitochondrial tubulin is likely to be organized in alpha/beta dimers and represents 2.2 +/- 0.5% of total cellular tubulin. Lastly, we showed by immunoprecipitation experiments that the mitochondrial tubulin is specifically associated with the voltage-dependent anion channel, the main component of the permeability transition pore. Thus, tubulin is an inherent component of mitochondrial membranes, and it could play a role in apoptosis via interaction with the permeability transition pore.
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Affiliation(s)
- Manon Carré
- UMR CNRS 6032, UFR Pharmacy, University of La Méditerranée, 27 Boulevard Jean Moulin, 13005 Marseille, France
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