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Li Z, Xu H, Ma B, Luo L, Guo L, Zhang P, Zhao Y, Wang L, Xie J. Neutralizing Monoclonal Antibody, mAb 10D8, Is an Effective Detoxicant against Abrin-a Both In Vitro and In Vivo. Toxins (Basel) 2022; 14:toxins14030164. [PMID: 35324661 PMCID: PMC8955035 DOI: 10.3390/toxins14030164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 02/05/2023] Open
Abstract
Abrin is a types II ribosome-inactivating protein (RIP) isolated from Abrus precatorious seeds, which comprises a catalytically active A chain and a lectin-like B chain linked by a disulfide bond. Four isotoxins of abrin have been reported with similar amino-acid composition but different cytotoxicity, of which abrin-a is the most potent toxin. High lethality and easy availability make abrin a potential bioterrorism agent. However, there are no antidotes available for managing abrin poisoning, and treatment is only symptomatic. Currently, neutralizing antibodies remain the most effective therapy against biotoxin poisoning. In this study, we prepared, identified, and acquired a high-affinity neutralizing monoclonal antibody (mAb) 10D8 with a potent pre- and post-exposure protective effect against cytotoxicity and animal toxicity induced by abrin-a or abrin crude extract. The mAb 10D8 could rescue the mouse injected intraperitoneally with a 25 × LD50 dose of abrin-a from lethality and prevent tissue damages. Results indicated that 10D8 does not prevent the binding and internalization of abrin-a to cells but inhibits the enzymatic activity of abrin-a and reduces protein synthesis inhibition of cells. The high affinity, good specificity, and potent antitoxic efficiency of 10D8 make it a promising candidate for therapeutic antibodies against abrin.
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Affiliation(s)
- Zhi Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Hua Xu
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
- Correspondence: (H.X.); (J.X.); Tel.: +86-10-66930621 (H.X.); +86-10-68225893 (J.X.)
| | - Bo Ma
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Li Luo
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Lei Guo
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Pingping Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Key Laboratory of POCT for Bioemergency and Clinic, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; (P.Z.); (Y.Z.)
| | - Yong Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Key Laboratory of POCT for Bioemergency and Clinic, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; (P.Z.); (Y.Z.)
| | - Lili Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
| | - Jianwei Xie
- State Key Laboratory of Toxicology and Medical Countermeasures, Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China; (Z.L.); (B.M.); (L.L.); (L.G.); (L.W.)
- Correspondence: (H.X.); (J.X.); Tel.: +86-10-66930621 (H.X.); +86-10-68225893 (J.X.)
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2
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Production and Evaluation of an Avian IgY Immunotoxin against CD133+ for Treatment of Carcinogenic Stem Cells in Malignant Glioma: IgY Immunotoxin for the Treatment of Glioblastoma. JOURNAL OF ONCOLOGY 2019; 2019:2563092. [PMID: 31275378 PMCID: PMC6582814 DOI: 10.1155/2019/2563092] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/25/2019] [Accepted: 05/09/2019] [Indexed: 02/07/2023]
Abstract
Background Glioblastoma is the most common malignant tumor of Central Nervous System. Despite the research in therapeutics, the prognosis is dismal. Malignant glioma stem cells (MGSCs) are a major cause of treatment failure and increasing tumor recurrence. In general, cancer stem cells (CSCs) express prominin-1 (CD133), considered as a potential therapeutic target. In this study, we produced an avian immunotoxin directed against the subpopulation of CD133+ CSCs within a malignant glioma. We used the avian IgY because it has various advantages as increased affinity to mammal antigens and inexpensive obtention of large amounts of specific antibodies (approximately 1 mg/per egg). The design, production, purification and use of IgY anti CD133 immunotoxin constitute an original goal of this research. Methods The immunodominant peptide of CD133 was designed to immunize hens; also, the extracellular domain of CD133 was cloned to probe the IgY antibodies. In parallel, a recombinant abrin A chain was produced in E. coli in order to join it to the Fc domain of the anti-CD133 IgY to conform the immunotoxin. This anti-CD133 IgY anti-tumor immunotoxin was tested in vitro and in vivo. Results. The cytotoxicity of the immunotoxin in vitro showed that IgY-abrin immunotoxin reduced 55% cell viability. After subcutaneous MGSCs implantation, the animals treated intraperitoneally or intratumorally with the IgY-abrin immunotoxin showed more than 50% decrease of tumor volume. Conclusion Results showed that the IgY-abrin immunotoxin had cytotoxic activity against CD133+ MGSCs and provides a novel approach for the immunotherapy of glioblastoma.
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3
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Lu Y, Zhang R, Wang Z, Zhou S, Song Y, Chen L, Chen N, Liu W, Ji C, Wu W, Zhang L. Mechanistic effect of the human GJB6 gene and its mutations in HaCaT cell proliferation and apoptosis. ACTA ACUST UNITED AC 2018; 51:e7560. [PMID: 30043857 PMCID: PMC6065815 DOI: 10.1590/1414-431x20187560] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 05/24/2018] [Indexed: 11/22/2022]
Abstract
We constructed lentiviral vectors containing the human wild-type GJB6 gene and the mutant variants A88V and G11R. The three proteins were stably expressed by the Tet-on system in the HaCaT cell line and used to study the functional effect of the variants. The CCK-8 assay and flow cytometric analyses were used to determine the levels of cell proliferation and apoptosis. Western blot analyses were performed to analyze the relevant clinical indicators of hidrotic ectodermal dysplasia and markers of apoptosis in transfected HaCaT cells. The CCK8 assay and the flow cytometry results showed a significant increase (P<0.05) in the apoptosis of HaCaT cells expressing the A88V and G11R mutants. In addition, we demonstrated that the A88V and G11R mutants induced the apoptosis of transfected HaCaT cells via the activation of caspase-3, -8, -9, and PARA. No change was observed in the activity of BAX compared with the control. This study provides further clarification on the mechanisms underlying the effect of the mutant variants A88V and G11R of the GJB6 gene on the induction of HaCaT cell apoptosis.
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Affiliation(s)
- Yuting Lu
- Department of Dermatology, Huadu District People's Hospital of Guangzhou, Guangzhou, China.,Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Ruili Zhang
- Department of Dermatology, Weihai Municipal Hospital, Yantai, China
| | - Zhenying Wang
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Shuhua Zhou
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Yali Song
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Lamei Chen
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Nan Chen
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Wenmin Liu
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Canan Ji
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Wangli Wu
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
| | - Li Zhang
- Department of Dermatology, Shandong Provincial Hospital affiliated to Shandong University, Jinan, China
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4
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Hirschberger K, Jarzebinska A, Kessel E, Kretzschmann V, Aneja MK, Dohmen C, Herrmann-Janson A, Wagner E, Plank C, Rudolph C. Exploring Cytotoxic mRNAs as a Novel Class of Anti-cancer Biotherapeutics. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2017; 8:141-151. [PMID: 29687033 PMCID: PMC5908148 DOI: 10.1016/j.omtm.2017.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 12/20/2017] [Indexed: 11/26/2022]
Abstract
New treatments to overcome the obstacles of conventional anti-cancer therapy are a permanent subject of investigation. One promising approach is the application of toxins linked to cell-specific ligands, so-called immunotoxins. Another attractive option is the employment of toxin-encoding plasmids. However, immunotoxins cause hepatoxicity, and DNA therapeutics, among other disadvantages, bear the risk of insertional mutagenesis. As an alternative, this study examined chemically modified mRNAs coding for diphtheria toxin, subtilase cytotoxin, and abrin-a for their ability to reduce cancer cell growth both in vitro and in vivo. The plant toxin abrin-a was the most promising candidate among the three tested toxins and was further investigated. Its expression was demonstrated by western blot. Experiments with firefly luciferase in reticulocyte lysates and co-transfection experiments with EGFP demonstrated the capability of abrin-a to inhibit protein synthesis. Its cytotoxic effect was quantified employing viability assays and propidium iodide staining. By studying caspase-3/7 activation, Annexin V-binding, and chromatin condensation with Hoechst33258 staining, apoptotic cell death could be confirmed. In mice, repeated intratumoral injections of complexed abrin-a mRNA resulted in a significant reduction (89%) of KB tumor size compared to a non-translatable control mRNA.
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Affiliation(s)
| | - Anita Jarzebinska
- Pharmaceutical Biotechnology, Department of Pharmacy, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - Eva Kessel
- Pharmaceutical Biotechnology, Department of Pharmacy, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | | | | | | | | | - Ernst Wagner
- Pharmaceutical Biotechnology, Department of Pharmacy, Ludwig-Maximilians-Universität München, Munich 81377, Germany
| | - Christian Plank
- Ethris GmbH, Planegg 82152, Germany
- Institute of Molecular Immunology-Experimental Oncology, Klinikum rechts der Isar, Technische Universität München, Munich 81675, Germany
| | - Carsten Rudolph
- Ethris GmbH, Planegg 82152, Germany
- Department of Pediatrics, Ludwig-Maximilians University, Munich 80337, Germany
- Corresponding author: Carsten Rudolph, Ethris GmbH, Planegg 82152, Germany.
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5
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Zhen Z, Yang K, Ye L, You Z, Chen R, Liu Y, He Y. Suberoylanilide hydroxamic acid sensitizes neuroblastoma to paclitaxel by inhibiting thioredoxin-related protein 14-mediated autophagy. Cancer Sci 2017; 108:1485-1492. [PMID: 28498513 PMCID: PMC5497723 DOI: 10.1111/cas.13279] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 05/01/2017] [Accepted: 05/08/2017] [Indexed: 12/21/2022] Open
Abstract
Paclitaxel is not as effective for neuroblastoma as most of the front‐line chemotherapeutics due to drug resistance. This study explored the regulatory mechanism of paclitaxel‐associated autophagy and potential solutions to paclitaxel resistance in neuroblastoma. The formation of autophagic vesicles was detected by scanning transmission electron microscopy and flow cytometry. The autophagy‐associated proteins were assessed by western blot. Autophagy was induced and the autophagy‐associated proteins LC3‐I, LC3‐II, Beclin 1, and thioredoxin‐related protein 14 (TRP14), were found to be upregulated in neuroblastoma cells that were exposed to paclitaxel. The inhibition of Beclin 1 or TRP14 by siRNA increased the sensitivity of the tumor cells to paclitaxel. In addition, Beclin 1‐mediated autophagy was regulated by TRP14. Furthermore, the TRP14 inhibitor suberoylanilide hydroxamic acid (SAHA) downregulated paclitaxel‐induced autophagy and enhanced the anticancer effects of paclitaxel in normal control cancer cells but not in cells with upregulated Beclin 1 and TRP14 expression. Our findings showed that paclitaxel‐induced autophagy in neuroblastoma cells was regulated by TRP14 and that SAHA could sensitize neuroblastoma cells to paclitaxel by specifically inhibiting TRP14.
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Affiliation(s)
- Zijun Zhen
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Department of Pediatric Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China.,Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Kaibin Yang
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Sun Yat-sen University Zhongshan School of Medicine, Guangzhou, China
| | - Litong Ye
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Sun Yat-sen University Zhongshan School of Medicine, Guangzhou, China
| | - Zhiyao You
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Sun Yat-sen University Zhongshan School of Medicine, Guangzhou, China
| | - Rirong Chen
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Sun Yat-sen University Zhongshan School of Medicine, Guangzhou, China
| | - Ying Liu
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Sun Yat-sen University Zhongshan School of Medicine, Guangzhou, China
| | - Youjian He
- State Key Laboratory of Oncology in South China, Guangzhou, China.,Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.,Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
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6
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Yu Y, Yang R, Zhao X, Qin D, Liu Z, Liu F, Song X, Li L, Feng R, Gao N. Abrin P2 suppresses proliferation and induces apoptosis of colon cancer cells via mitochondrial membrane depolarization and caspase activation. Acta Biochim Biophys Sin (Shanghai) 2016; 48:420-9. [PMID: 27055473 DOI: 10.1093/abbs/gmw023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 02/20/2016] [Indexed: 12/31/2022] Open
Abstract
To explore the cytotoxic mechanism of abrin P2 on human colon cancer HCT-8 cells, abrin P2 was isolated from the seed of Abrus precatorius L. It was found that abrin P2 exhibited cytotoxicity toward 12 different human cancer cell lines. Our results demonstrated that abrin P2 suppressed the proliferation of human colon cancer cells (HCT-8 cells) and induced cell cycle arrest at the S and G2/M phases. The mechanism by which abrin P2 inhibited cell proliferation was via the down-regulation of cyclin B1, proliferating cell nuclear antigen and Ki67, as well as the up-regulation of P21. In addition, abrin P2 induced a dose- and time-dependent increase in the rate of HCT-8 cell apoptosis. Treatment with both Z-VAD-FMK, a broad-spectrum caspase inhibitor, and abrin P2 demonstrated that abrin P2 induced HCT-8 cell apoptosis via the activation of caspases. Together, our results revealed that abrin P2-induced apoptosis in HCT-8 cells was associated with the activation of caspases-3/-8/-9, the reduction in the Bcl-2/Bax ratio, the loss of mitochondrial membrane potential, and the increase in cytochrome c release. We further showed that abrin P2 administration effectively suppressed the growth of colon cancer xenografts in nude mice. This is the first report that abrin P2 effectively inhibits colon cancer cell growth in vivo and in vitro by suppressing proliferation and inducing apoptosis.
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Affiliation(s)
- Ying Yu
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China Center of Research on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin 150076, China
| | - Runmei Yang
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China
| | - Xiuyun Zhao
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China Center of Research on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin 150076, China
| | - Dandan Qin
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China Center of Research on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin 150076, China
| | - Zhaoyang Liu
- Cancer Institute, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China
| | - Fang Liu
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China
| | - Xin Song
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China
| | - Liqin Li
- Research Institute of Chemical Defense of PLA, Beijing 102205, China
| | - Renqing Feng
- College of Life Sciences, Peking University, Beijing 100871, China
| | - Nannan Gao
- Pharmacology and Toxicology Research Center, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China
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7
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Peng X, Gong F, Chen Y, Jiang Y, Liu J, Yu M, Zhang S, Wang M, Xiao G, Liao H. Autophagy promotes paclitaxel resistance of cervical cancer cells: involvement of Warburg effect activated hypoxia-induced factor 1-α-mediated signaling. Cell Death Dis 2014; 5:e1367. [PMID: 25118927 PMCID: PMC4454295 DOI: 10.1038/cddis.2014.297] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 05/06/2014] [Accepted: 05/27/2014] [Indexed: 02/05/2023]
Abstract
Paclitaxel is one of the most effective chemotherapy drugs for advanced cervical cancer. However, acquired resistance of paclitaxel represents a major barrier to successful anticancer treatment. In this study, paclitaxel-resistant HeLa sublines (HeLa-R cell lines) were established by continuous exposure and increased autophagy level was observed in HeLa-R cells. 3-Methyladenine or ATG7 siRNA, autophagy inhibitors, could restore sensitivity of HeLa-R cells to paclitaxel compared with parental HeLa cells. To determine the underlying molecular mechanism, differentially expressed proteins between HeLa and HeLa-R cells were identified by two-dimensional gel electrophoresis coupled with electrospray ionization quadrupole time-of-flight MS/MS. We found glycolysis-associated proteins were upregulated in HeLa-R cell lines. Inhibition of glycolysis by 2-deoxy-D-glucose or koningic acid could decrease autophagy and enhance sensitivity of HeLa-R cells to paclitaxel. Moreover, glycolysis could activate HIF1-α. Downregulation of HIF1-α by specific siRNA could decrease autophagy and resensitize HeLa-R cells to paclitaxel. Taken together, a possible Warburg effect activated HIF1-α-mediated signaling-induced autophagic pathway is proposed, which may provide new insight into paclitaxel chemoresistance.
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Affiliation(s)
- X Peng
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - F Gong
- Department of Gynecology and Obstetrics, Second West China Hospital; and State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Y Chen
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Y Jiang
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - J Liu
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - M Yu
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - S Zhang
- Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - M Wang
- Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - G Xiao
- Department of Pathology, Zunyi Medical College, Zunyi 563003, People's Republic of China
| | - H Liao
- Department of Pathology, Wenzhou Central Hospital, Wenzhou 325000, People's Republic of China
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8
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Induction of apoptotic effects of antiproliferative protein from the seeds of Borreria hispida on lung cancer (A549) and cervical cancer (HeLa) cell lines. BIOMED RESEARCH INTERNATIONAL 2014; 2014:179836. [PMID: 24605320 PMCID: PMC3925513 DOI: 10.1155/2014/179836] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 12/08/2013] [Accepted: 12/10/2013] [Indexed: 11/18/2022]
Abstract
A 35 KDa protein referred to as F3 was purified from the seeds of Borreria hispida by precipitation with 80% ammonium sulphate and gel filtration on Sephadex G-100 column. RP-HPLC analysis of protein fraction (F3) on an analytical C-18 column produced a single peak, detected at 220 nm. F3 showed an apparent molecular weight of 35 KDa by SDS PAGE and MALDI-TOF-MS analyses. Peptide mass fingerprinting analysis of F3 showed the closest homology with the sequence of 1-aminocyclopropane-1-carboxylate deaminase of Pyrococcus horikoshii. The protein (F3) exhibited significant cytotoxic activity against lung (A549) and cervical (HeLa) cancer cells in a dose-dependent manner at concentrations ranging from 10 µg to 1000 µg/mL, as revealed by the MTT assay. Cell cycle analysis revealed the increased growth of sub-G0 population in both cell lines exposed to a concentration of 1000 µg/mL of protein fraction F3 as examined from flow cytometry. This is the first report of a protein from the seeds of Borreria hispida with antiproliferative and apoptotic activity in lung (A549) and cervical (HeLa) cancer cells.
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9
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Nguyen VT, Lee JS, Qian ZJ, Li YX, Kim KN, Heo SJ, Jeon YJ, Park WS, Choi IW, Je JY, Jung WK. Gliotoxin isolated from marine fungus Aspergillus sp. induces apoptosis of human cervical cancer and chondrosarcoma cells. Mar Drugs 2013; 12:69-87. [PMID: 24368570 PMCID: PMC3917261 DOI: 10.3390/md12010069] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/09/2013] [Accepted: 12/11/2013] [Indexed: 12/19/2022] Open
Abstract
Gliotoxin, a secondary metabolite produced by marine fungus Aspergillus sp., possesses various biological activities including anticancer activity. However, the mechanism underlying gliotoxin-induced cytotoxicity on human cervical cancer (Hela) and human chondrosarcoma (SW1353) cells remains unclear. In this study, we focused on the effect of gliotoxin induction on apoptosis, the activating expressions of caspase family enzymes in the cells. Apoptotic cell levels were measured through DAPI and Annexin V/Propidium Iodide (PI) double staining analysis. The apoptotic protein expression of Bcl-2 and caspase family was detected by Western blot in Hela and SW1353 cells. Our results showed that gliotoxin treatment inhibited cell proliferation and induced significant morphological changes. Gliotoxin induced apoptosis was further confirmed by DNA fragmentation, chromatin condensation and disrupted mitochondrial membrane potential. Gliotoxin-induced activation of caspase-3, caspase-8 and caspase-9, down-regulation of Bcl-2, up-regulation of Bax and cytochromec (cyt c) release showed evidence for the gliotoxin activity on apoptosis. These findings suggest that gliotoxin isolated from marine fungus Aspergillus sp. induced apoptosis in Hela and SW1353 cells via the mitochondrial pathway followed by downstream events leading to apoptotic mode of cell death.
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Affiliation(s)
- Van-Tinh Nguyen
- Department of Biomedical Engineering, and Centre for Marine-Integrated Biomedical Technology (BK21 Plus) Pukyong National University, Busan 608-737, Korea; E-Mail:
| | - Jung Suck Lee
- Industry-Academic Cooperation Foundation, Jeju National University, Jeju 690-756, Korea; E-Mail:
| | - Zhong-Ji Qian
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; E-Mail:
| | - Yong-Xin Li
- Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Korea; E-Mail:
| | - Kil-Nam Kim
- Marine Bio Research Team, Korea Basic Science Institute (KBSI), Jeju 690-140, Korea; E-Mail:
| | - Soo-Jin Heo
- Global Bioresources Research Center, Korea Institute of Ocean Science & Technology, Ansan 426-744, Korea; E-Mail:
| | - You-Jin Jeon
- Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Korea; E-Mail:
| | - Won Sun Park
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon 200-701, Korea; E-Mail:
| | - Il-Whan Choi
- Department of Microbiology, College of Medicine, Inje University, Busan 608-737, Korea; E-Mail:
| | - Jae-Young Je
- Department of Marine Bio-Food Sciences, Chonnam National University, Yeosu 550-749, Korea
- Authors to whom correspondence should be addressed; E-Mails: (J.-Y.J.); (W.-K.J.); Tel.: +82-61-659-7416 (J.-Y.J.); Fax: +82-61-659-7419 (J.-Y.J.); Tel./Fax: +82-51-629-5775 (W.-K.J.)
| | - Won-Kyo Jung
- Department of Biomedical Engineering, and Centre for Marine-Integrated Biomedical Technology (BK21 Plus) Pukyong National University, Busan 608-737, Korea; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (J.-Y.J.); (W.-K.J.); Tel.: +82-61-659-7416 (J.-Y.J.); Fax: +82-61-659-7419 (J.-Y.J.); Tel./Fax: +82-51-629-5775 (W.-K.J.)
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10
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Hussain A, Somyajit K, Banik B, Banerjee S, Nagaraju G, Chakravarty AR. Enhancing the photocytotoxic potential of curcumin on terpyridyl lanthanide(III) complex formation. Dalton Trans 2013; 42:182-95. [PMID: 23108133 DOI: 10.1039/c2dt32042h] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Lanthanide(III) complexes [Ln(R-tpy)(cur)(NO3)2] (Ln = La(III) in 1, 2; Gd(III) in 5, 6) and [Ln(R-tpy)(scur)(NO3)2] (Ln = La(III) in 3, 4; Gd(III) in 7, 8), where R-tpy is 4′-phenyl-2,2′:6′,2′′-terpyridine (ph-tpy in 1, 3, 5, 7), 4′-(1-pyrenyl)-2,2′:6′,2′′-terpyridine (py-tpy in 2, 4, 6, 8), Hcur is curcumin (in 1, 2, 5, 6) and Hscur is diglucosylcurcumin (in 3, 4, 7, 8), were prepared and their DNA photocleavage activity and photocytotoxicity studied. Complexes [La(ph-tpy)(cur)(NO3)2] (1) and [Gd(ph-tpy)(cur)(NO3)2] (5) were structurally characterized. The complexes in aqueous-DMF showed an absorption band near 430 nm and an emission band near 515 nm when excited at 420 nm. The complexes are moderate binders to calf-thymus DNA. They cleave plasmid supercoiled DNA to its nicked circular form in UV-A (365 nm) and visible light (454 nm) via (1)O2 and ˙OH pathways. The complexes are remarkably photocytotoxic in HeLa cells in visible light (λ = 400–700 nm) and are non-toxic in the dark. FACScan analysis of the HeLa cells treated with 2 and 4 showed cell death via an apoptotic pathway. Nuclear localization of 1–4 is evidenced from confocal imaging on HeLa cells. The hydrolytic instability of curcumin gets significantly reduced upon binding to the lanthanide ions while retaining its photocytotoxic potential.
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Affiliation(s)
- Akhtar Hussain
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560 012, India
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Gadadhar S, Karande AA. Abrin immunotoxin: targeted cytotoxicity and intracellular trafficking pathway. PLoS One 2013; 8:e58304. [PMID: 23472175 PMCID: PMC3589266 DOI: 10.1371/journal.pone.0058304] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 02/01/2013] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Immunotherapy is fast emerging as one of the leading modes of treatment of cancer, in combination with chemotherapy and radiation. Use of immunotoxins, proteins bearing a cell-surface receptor-specific antibody conjugated to a toxin, enhances the efficacy of cancer treatment. The toxin Abrin, isolated from the Abrus precatorius plant, is a type II ribosome inactivating protein, has a catalytic efficiency higher than any other toxin belonging to this class of proteins but has not been exploited much for use in targeted therapy. METHODS Protein synthesis assay using (3)[H] L-leucine incorporation; construction and purification of immunotoxin; study of cell death using flow cytometry; confocal scanning microscopy and sub-cellular fractionation with immunoblot analysis of localization of proteins. RESULTS We used the recombinant A chain of abrin to conjugate to antibodies raised against the human gonadotropin releasing hormone receptor. The conjugate inhibited protein synthesis and also induced cell death specifically in cells expressing the receptor. The conjugate exhibited differences in the kinetics of inhibition of protein synthesis, in comparison to abrin, and this was attributed to differences in internalization and trafficking of the conjugate within the cells. Moreover, observations of sequestration of the A chain into the nucleus of cells treated with abrin but not in cells treated with the conjugate reveal a novel pathway for the movement of the conjugate in the cells. CONCLUSIONS This is one of the first reports on nuclear localization of abrin, a type II RIP. The immunotoxin mAb F1G4-rABRa-A, generated in our laboratory, inhibits protein synthesis specifically on cells expressing the gonadotropin releasing hormone receptor and the pathway of internalization of the protein is distinct from that seen for abrin.
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Affiliation(s)
- Sudarshan Gadadhar
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Anjali A. Karande
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
- * E-mail:
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Banik B, Somyajit K, Koley D, Nagaraju G, Chakravarty AR. Cellular uptake and remarkable photocytotoxicity of pyrenylter pyridine oxovanadium(IV) complexes of dipyridophenazine bases. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Maity B, Gadadhar S, Goswami TK, Karande AA, Chakravarty AR. Photo-induced anticancer activity of polypyridyl platinum(II) complexes. Eur J Med Chem 2012; 57:250-8. [DOI: 10.1016/j.ejmech.2012.09.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 08/21/2012] [Accepted: 09/16/2012] [Indexed: 01/28/2023]
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Méndez J, Monteagudo A, Griebenow K. Stimulus-responsive controlled release system by covalent immobilization of an enzyme into mesoporous silica nanoparticles. Bioconjug Chem 2012; 23:698-704. [PMID: 22375899 DOI: 10.1021/bc200301a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mesoporous silica nanoparticles (MSN) have emerged as an attractive class of drug delivery carriers for therapeutic agents. Herein, we explored the covalent immobilization of proteins into MSN to generate a stimulus-responsive controlled release system. First, MSN were functionalized with thiol groups using (mercaptopropyl)-trimethoxysilane (MPTMS). Functionalization was verified by X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared (FTIR) spectroscopy, and dynamic light scattering. The model enzyme carbonic anhydrase (CA) was coupled to sulfosuccinimidyl 6-[3'(2-pyridyldithio)-propionamido]hexanoate (Sulfo-LC-SPDP) at a low ratio of 1:1 to prevent enzyme inactivation and subsequently covalently immobilized into MSN via thiol-disulfide interchange. The enzyme could be released from MSN with 10 mM glutathione, which represents intracellular redox conditions, while it remained bound to the MSN at extracellular redox conditions represented by 1 μM glutathione. The activity of the released enzyme was >80% demonstrating that the enzyme was still largely functional and active after immobilization and release. Human cervical cancer (HeLa) cells were incubated with the MSN-CA bioconjugates at various concentrations for 24 h and the data show good biocompatibility. In summary, we demonstrate the potential of MSN as drug delivery systems for proteins.
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Affiliation(s)
- Jessica Méndez
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, P.O. Box 23346, San Juan, PR 00931-3346, USA
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Hussain A, Gadadhar S, Goswami TK, Karande AA, Chakravarty AR. Photo-induced DNA cleavage activity and remarkable photocytotoxicity of lanthanide(iii) complexes of a polypyridyl ligand. Dalton Trans 2012; 41:885-95. [DOI: 10.1039/c1dt11400j] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Involvement of prohibitin upregulation in abrin-triggered apoptosis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2011; 2012:605154. [PMID: 21961024 PMCID: PMC3179879 DOI: 10.1155/2012/605154] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 07/18/2011] [Indexed: 11/17/2022]
Abstract
Abrin (ABR), a protein purified from the seeds of Abrus precatorius, induces apoptosis in various types of cancer cells. However, the detailed mechanism remains largely uncharacterized. By using a cDNA microarray platform, we determined that prohibitin (PHB), a tumor suppressor protein, is significantly upregulated in ABR-triggered apoptosis. ABR-induced upregulation of PHB is mediated by the stress-activated protein kinase/c-Jun NH2-terminal kinase (SAPK/JNK) pathway, as demonstrated by chemical inhibitors. In addition, ABR significantly induced the expression of Bax as well as the activation of caspase-3 and poly(ADP-ribose) polymerase (PARP) in Jurkat T cells, whereas the reduction of PHB by specific RNA interference delayed ABR-triggered apoptosis through the proapoptotic genes examined. Moreover, our results also indicated that nuclear translocation of the PHB-p53 complex may play a role in the transcription of Bax. Collectively, our data show that PHB plays a role in ABR-induced apoptosis, which may be helpful for the development of diagnostic or therapeutic agents.
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Maity B, Gadadhar S, Goswami TK, Karande AA, Chakravarty AR. Impact of metal on the DNA photocleavage activity and cytotoxicity of ferrocenyl terpyridine 3d metal complexes. Dalton Trans 2011; 40:11904-13. [DOI: 10.1039/c1dt11102g] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Son YO, Hitron JA, Wang X, Chang Q, Pan J, Zhang Z, Liu J, Wang S, Lee JC, Shi X. Cr(VI) induces mitochondrial-mediated and caspase-dependent apoptosis through reactive oxygen species-mediated p53 activation in JB6 Cl41 cells. Toxicol Appl Pharmacol 2010; 245:226-35. [PMID: 20298709 DOI: 10.1016/j.taap.2010.03.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 02/26/2010] [Accepted: 03/02/2010] [Indexed: 11/28/2022]
Abstract
Cr(VI) compounds are known to cause serious toxic and carcinogenic effects. Cr(VI) exposure can lead to a severe damage to the skin, but the mechanisms involved in the Cr(VI)-mediated toxicity in the skin are unclear. The present study examined whether Cr(VI) induces cell death by apoptosis or necrosis using mouse skin epidermal cell line, JB6 Cl41 cells. We also investigated the cellular mechanisms of Cr(VI)-induced cell death. This study showed that Cr(VI) induced apoptotic cell death in a dose-dependent manner, as demonstrated by the appearance of cell shrinkage, the migration of cells into the sub-G1 phase, the increase of Annexin V positively stained cells, and the formation of nuclear DNA ladders. Cr(VI) treatment resulted in the increases of mitochondrial membrane depolarization and caspases activation. Electron spin resonance (ESR) and fluorescence analysis revealed that Cr(VI) increased intracellular levels of reactive oxygen species (ROS) such as hydrogen peroxide and superoxide anion radical in dose-dependent manner. Blockage of p53 by si-RNA transfection suppressed mitochondrial changes of Bcl-2 family composition, mitochondrial membrane depolarization, caspase activation and PARP cleavage, leading to the inhibition of Cr(VI)-induced apoptosis. Further, catalase treatment prevented p53 phosphorylation stimulated by Cr(VI) with the concomitant inhibition of caspase activation. These results suggest that Cr(VI) induced a mitochondrial-mediated and caspase-dependent apoptosis in skin epidermal cells through activation of p53, which are mainly mediated by reactive oxidants generated by the chemical.
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Affiliation(s)
- Young-Ok Son
- Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY 40536-0305, USA
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Kook SH, Son YO, Han SK, Lee HS, Kim BT, Jang YS, Choi KC, Lee KS, Kim SS, Lim JY, Jeon YM, Kim JG, Lee JC. Epstein-Barr virus-infected Akata cells are sensitive to histone deacetylase inhibitor TSA-provoked apoptosis. BMB Rep 2009; 38:755-62. [PMID: 16336792 DOI: 10.5483/bmbrep.2005.38.6.755] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Epstein-Barr virus (EBV) infects more than 90 % of the world's population and has a potential oncogenic nature. A histone deacetylase (HDAC) inhibitor, trichostatin A (TSA), has shown potential ability in cancer chemoprevention and treatment, but its effect on EBV-infected Akata cells has not been examined. This study investigated the effect of TSA on the proliferation and apoptosis of the cells. TSA inhibited cell growth and induced cytotoxicity in the EBV-infected Akata cells. TSA treatment sensitively induced apoptosis in the cell, which was demonstrated by the increased number of positively stained cells in the TUNEL assay, the migration of many cells to the sub-G0/G1 phase in flow cytometric analysis, and the ladder formation of genomic DNA. Western blot analysis showed that caspase-dependent pathways are involved in the TSA-induced apoptosis of EBV-infected Akata cells. Overall, this study shows that EBV-infected B lymphomas are quite sensitive to TSA-provoked apoptosis.
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Affiliation(s)
- Sung-Ho Kook
- Laboratory of Cell Biology in Department of Orthodontics and Institute of Oral Biosciences, Chonbuk National University, Chonju 561-756, Korea
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Ramnath V, Rekha PS, Kuttan G, Kuttan R. Regulation of Caspase-3 and Bcl-2 Expression in Dalton's Lymphoma Ascites Cells by Abrin. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2007; 6:233-8. [PMID: 18955274 PMCID: PMC2686625 DOI: 10.1093/ecam/nem099] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The role of abrin, a toxic lectin isolated from seeds of Abrus precatorius Linn in inducing apoptosis in murine Dalton's Lymphoma Ascites (DLA) cells was evaluated. Abrin when incubated at the concentration of 10 ng per million DLA cells could bring about cell death as typical morphological changes with apoptosis. However, necrotic cell death dominated when a higher dose of abrin was used. DNA samples, isolated from DLA cells treated with abrin showed fragmentation. Abrin brought about induction of apoptosis by stimulating the expression of pro-apoptotic Caspase-3, at the same time blocking the expression of Bcl-2, which is an anti apoptotic gene. However, the expression of tumor suppressor gene p53 has not been observed in control and abrin-treated DLA cells. Results suggested that abrin effectively induced apoptotic changes in the tumor cells that led to cellular death.
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Affiliation(s)
- V Ramnath
- College of Veterinary and Animal Sciences, Kerala Agricultural University, Mannuthy, Thrissur, 680 651, Kerala. Fax: 91-0487-2370388;
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