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Sun L, Wu Q, Huan XJ, Tian CQ, Wang YQ, Miao ZH. Loss of VOPP1 Contributes to BET Inhibitor Acquired Resistance in Non-Small Cell Lung Cancer Cells. Mol Cancer Res 2022; 20:1785-1798. [PMID: 36001806 DOI: 10.1158/1541-7786.mcr-21-1000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 07/12/2022] [Accepted: 08/23/2022] [Indexed: 01/15/2023]
Abstract
Inhibitors targeting bromodomain and extraterminal (BET) proteins are promising anticancer drugs. The emergence of drug resistance during treatments will impair their therapeutic effectiveness. To investigate the mechanisms of acquired resistance to BET inhibitors (BETi), we generated a series of drug-resistant sublines by exposing non-small cell lung cancer (NSCLC) NCI-H1975 cells to the BETi ABBV-075. These sublines displayed cross-resistance to other tested BETis, increased migration abilities, reduced growth rates accompanied by an increased proportion of cells in G1 phase and decreased apoptotic responses to BETis. Changes in RNA expression and gene mutation profiles in the resistant variants indicate that emergence of BETi resistance is multifactorial. Importantly, all the tested ABBV-075-resistant variants showed loss of vesicular overexpressed in cancer prosurvival protein 1 (VOPP1) and an increase in the antiapoptotic BCL-2 protein. By knockdown, knockout, and reconstitution of VOPP1 in resistant cells, their parental cells, and other NSCLC cells, we confirmed that the loss of VOPP1 contributed to BETi resistance. Moreover, knockout of VOPP1 in the parental cells caused the increased expression of BCL-2, and the latter directly mediated BETi resistance. Through combined treatments with BETis and BCL-2 inhibitors (BCL-2i), we demonstrated that BCL-2is synergistically sensitized resistant cells to BETis. IMPLICATIONS Based on these results, for the first time, we establish a causal link from VOPP1 loss to BCL-2 gain and then to BETi resistance, which provides new insights into BETi resistance and paves the way for further testing to circumvent BETi resistance.
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Affiliation(s)
- Lin Sun
- State Key Laboratory of Drug Research, Cancer Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qian Wu
- State Key Laboratory of Drug Research, Cancer Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xia-Juan Huan
- State Key Laboratory of Drug Research, Cancer Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Chang-Qing Tian
- State Key Laboratory of Drug Research, Cancer Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Ying-Qing Wang
- State Key Laboratory of Drug Research, Cancer Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Ze-Hong Miao
- State Key Laboratory of Drug Research, Cancer Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
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Fu C, Qin J, Liu X, Kong F. Galactosed and Reduction-Responsive Nanoparticles Assembled from Trimethylchitosan–Camptothecin Conjugates for Enhanced Hepatocellular Carcinoma Therapy. Pharmaceutics 2022; 14:pharmaceutics14071315. [PMID: 35890209 PMCID: PMC9316716 DOI: 10.3390/pharmaceutics14071315] [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: 05/25/2022] [Revised: 06/15/2022] [Accepted: 06/18/2022] [Indexed: 12/04/2022] Open
Abstract
The targeted delivery of drugs to tumor cells and prevention of premature release before reaching the target is one of the key challenges to developing nanomedicines. In this paper, galactose decorated trimethyl chitosan (GT)–camptothecin (CPT) prodrug nanoparticles (GT-ss-CPT NPs) were prepared from GT-CPT conjugates linked by dithiodipropionic acid. The obtained GT-ss-CPT NPs were spherical with a particle size of 184.1 nm. GT-ss-CPT NPs displayed low drug release under physiological conditions, whereas efficient drug release was triggered by high GSH concentration. GT-ss-CPT NPs exhibited a higher antitumor effect both in vitro and in vivo than the free drug counterpart. More importantly, GT-ss-CPT NPs reduced the high systematic toxicity of CPT to tumor-bearing mice. In summary, GT-ss-CPT NPs can not only inhibit the premature release of CPT but also have a great potential for targeted hepatocellular carcinoma chemotherapy.
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Affiliation(s)
- Chen Fu
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang 110122, China;
| | - Jingcan Qin
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 600 Yi Shan Road, Shanghai 200233, China;
| | - Xinlong Liu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China;
| | - Fei Kong
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China;
- Correspondence:
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Yang JL, Yang MD, Chen JC, Lu KW, Huang YP, Peng SF, Chueh FS, Liu KC, Lin TS, Chen PY, Chen WJ. Ouabain Induces DNA Damage in Human Osteosarcoma U-2 OS Cells and Alters the Expression of DNA Damage and DNA Repair-associated Proteins. In Vivo 2021; 35:2687-2696. [PMID: 34410957 DOI: 10.21873/invivo.12552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Ouabain, isolated from natural plants, exhibits anticancer activities; however, no report has presented its mechanism of DNA damage induction in human osteosarcoma cancer cells in vitro. The aim of this study was to investigate whether ouabain induces DNA damage and repair, accompanied with molecular pathways in human osteosarcoma cancer U-2 OS cells in vitro. MATERIALS AND METHODS The percentage of viable cell number was measured by flow cytometric assay; DNA damage was assayed by DAPI staining, comet assay, and agarose gel electrophoresis. DNA damage and repair associated protein expressions were assayed by western blotting assays. RESULTS Ouabain reduced total cell viability, induced chromatin condensation, DNA fragmentation, and DNA damage in U-2 OS cells. Ouabain increased p-ATMSer1981, p-ATRSer428, and p53 at 2.5-10 μM, increased p-p53Ser15 at 10 μM; however, it decreased p-MDM2Ser166 at 2.5-10 μM. Ouabain increased p-H2A.XSer139, MDC-1, and PARP at 2.5-10 μM and BRCA1 at 5-10 μM; however, it decreased DNA-PK and MGMT at 2.5-10 μM in U-2 OS cells at 48 h treatment. Ouabain promoted expression and nuclear translocation of p-H2A.XSer139 in U-2 OS cells and this was confirmed by confocal laser microscopy. CONCLUSION Ouabain reduced total viable cell number through triggering DNA damage and altering the protein expression of DNA damage and repair system in U-2 OS cells in vitro.
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Affiliation(s)
- Jiun-Long Yang
- Department of Nursing, Saint Mary's Junior College of Medicine, Nursing and Management, Yilan, Taiwan, R.O.C
| | - Mei-Due Yang
- Department of Surgery, China Medical University Hospital, Taichung, Taiwan, R.O.C
| | - Jaw-Chyun Chen
- Department of Medicinal Botany and Health Applications, Da-Yeh University, Changhua, Taiwan, R.O.C
| | - Kung-Wen Lu
- College of Chinese Medicine, School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Yi-Ping Huang
- Department of Physiology, School of Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Shu-Fen Peng
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, R.O.C.,Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, R.O.C
| | - Fu-Shin Chueh
- Department of Food Nutrition and Health Biotechnology, Asia University, Taichung, Taiwan, R.O.C
| | - Kuo-Ching Liu
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan, R.O.C
| | - Tzu-Shun Lin
- Department of Nursing, Saint Mary's Junior College of Medicine, Nursing and Management, Yilan, Taiwan, R.O.C.,Department of Pharmacy, Saint Mary's Hospital Luodong, Yilan, Taiwan, R.O.C
| | - Po-Yuan Chen
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, R.O.C.;
| | - Wei-Jen Chen
- Department of Orthopedics, Chang Bing Show-Chwan Memorial Hospital, Changhua, Taiwan, R.O.C.; .,Department of Orthopedics, Show-Chwan Memorial Hospital, Changhua, Taiwan, R.O.C
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Wang X, Oates JC, Helke KL, Gilkeson GS, Zhang XK. Camptothecin and Topotecan, Inhibitors of Transcription Factor Fli-1 and Topoisomerase, Markedly Ameliorate Lupus Nephritis in (NZB × NZW)F1 Mice and Reduce the Production of Inflammatory Mediators in Human Renal Cells. Arthritis Rheumatol 2021; 73:1478-1488. [PMID: 33559345 PMCID: PMC9853877 DOI: 10.1002/art.41685] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 02/04/2021] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To examine the therapeutic effects of camptothecin (CPT) and topotecan (TPT), inhibitors of transcription factor Fli-1 and topoisomerase, on lupus nephritis in (NZB × NZW)F1 (NZBWF1) mice, and to examine the effects of CPT and TPT on inflammatory mediators in human renal cells. METHODS Female NZBWF1 mice were treated with vehicle, cyclophosphamide (CYC), CPT (1 mg/kg or 2 mg/kg), or TPT (0.03 mg/kg, 0.1 mg/kg, or 0. 3 mg/kg) by intraperitoneal injection twice a week, beginning at the age of 25 weeks (n = 8-10 mice per group). Blood and urine were collected for monitoring autoantibodies and proteinuria. Mice were euthanized at 40 weeks, and renal pathology scores were assessed. Human renal endothelial and mesangial cells were treated with CPT or TPT, and cytokine expression was measured. RESULTS None of the NZBWF1 mice treated with 1 mg/kg or 2 mg/kg of CPT or 0.3 mg/kg of TPT had proteinuria >100 mg/dl at the age of 40 weeks. One of 8 mice treated with 0.1 mg/kg of TPT and 1 of 10 mice treated with CYC had proteinuria >300 mg/dl, whereas 90% of the mice treated with vehicle had proteinuria >300 mg/dl. Compared to vehicle control, mice treated with 1 mg/kg or 2 mg/kg of CPT, 0.1 mg/kg or 0.3 mg/kg of TPT, or CYC had significantly prolonged survival, attenuated renal injury, diminished splenomegaly, reduced anti-double-stranded DNA autoantibody levels, and reduced IgG and C3 deposits in the glomeruli (all P < 0.05). Human renal cells treated with CPT or TPT had reduced expression of Fli-1 and decreased monocyte chemotactic protein 1 production following stimulation with interferon-α (IFNα) or IFNγ. CONCLUSION Our findings indicate that low-dose CPT and TPT could be repurposed to treat lupus nephritis.
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Affiliation(s)
- Xuan Wang
- Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008 China,Division of Rheumatology and Immunology, Department of Medicine. Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Jim C. Oates
- Division of Rheumatology and Immunology, Department of Medicine. Medical University of South Carolina, Charleston, SC, 29425, USA,Medical Service, Ralph H. Johnson VA Medical Center, Charleston, SC 29403
| | - Kristi L. Helke
- Department of Comparative Medicine, Medical University of South Carolina, Charleston SC, 29425, USA
| | - Gary S. Gilkeson
- Division of Rheumatology and Immunology, Department of Medicine. Medical University of South Carolina, Charleston, SC, 29425, USA,Medical Service, Ralph H. Johnson VA Medical Center, Charleston, SC 29403
| | - Xian K. Zhang
- Division of Rheumatology and Immunology, Department of Medicine. Medical University of South Carolina, Charleston, SC, 29425, USA
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Yin M, Zhang J, Zeng X, Zhang H, Gao Y. Target identification and drug discovery by data-driven hypothesis and experimental validation in ovarian endometriosis. Fertil Steril 2021; 116:478-492. [PMID: 33714537 DOI: 10.1016/j.fertnstert.2021.01.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 01/14/2023]
Abstract
OBJECTIVE To identify targets and discover drugs for ovarian endometriosis (OE) DESIGN: A basic study based on a data-driven hypothesis and experimental validation SETTING: Center for Reproductive Medicine PATIENT(S)/ANIMAL(S): Fourteen patients with OE and 7 healthy donors were recruited, and 15 female C57/BL6 mice were involved. INTERVENTION(S) Samples of OE lesions and normal endometrium were obtained. The ITPR1-knockdowned ectopic human endometrial stromal cells (HESCs) were subjected to ribonucleic acid (RNA) sequencing, cell-counting kit-8 (CCK-8) assay, 5-ethynyl-2'-deoxyuridine (EdU) staining, and flow cytometry. Camptothecin was administered to HESCs and in an OE mouse model. MAIN OUTCOME MEASURE(S) ITPR1 expression in OE lesions and normal endometrium, cell proliferation and apoptosis of HESCs with ITPR1 knockdown or camptothecin treatment, and autograft volume in the OE mouse model RESULT(S): Two significant OE-relevant gene modules were identified and involved the PI3K/Akt and aging-relevant pathways. Fifteen hub genes were identified and confirmed, among which the most significant gene, ITPR1, was robustly elevated in OE lesions. RNA sequencing revealed that ITPR1 was highly relevant to cell proliferation and apoptosis, which was further confirmed by CCK-8 assay, EdU staining, and flow cytometry analysis. ITPR1 knockdown inhibited cell proliferation and induced HESC apoptosis. The candidate drugs targeting these modules were screened, among which camptothecin and irinotecan were identified as promising drugs. Both compounds suppressed HESC proliferation and induced apoptosis; ITPR1 expression was suppressed by camptothecin. The therapeutic effect of camptothecin was also validated in the OE mouse model. CONCLUSION(S) This study identified the therapeutic targets and promising drugs for OE and shed light on the use of camptothecin in OE treatment.
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Affiliation(s)
- Minuo Yin
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Jiaming Zhang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China; Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xinliu Zeng
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Hanke Zhang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Ying Gao
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
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Polymeric micelles coated with hybrid nanovesicles enhance the therapeutic potential of the reversible topoisomerase inhibitor camptothecin in a mouse model. Acta Biomater 2021; 121:579-591. [PMID: 33285325 DOI: 10.1016/j.actbio.2020.11.049] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/17/2020] [Accepted: 11/27/2020] [Indexed: 12/24/2022]
Abstract
Nanoparticles with longer blood circulation, high loading capacity, controlled release at the targeted site, and preservation of camptothecin (CPT) in its lactone form are the key characteristics for the effective delivery of CPT. In this regard, natural membrane-derived nanovesicles, particularly those derived from RBC membrane, are important. RBC membrane can be engineered to form vesicles or can be coated over synthetic nanoparticles, without losing their basic structural features and can have prolonged circulation time. Here, we developed a hybrid system to encapsulate CPT inside the amphiphilic micelle and coat it with RBC membrane. Thus, it uses the dual ability of polymeric micelles to preserve CPT in its active form, while maintaining its "stealth" effect due to conserved RBC membrane coating. The hybrid system stabilized 60% of the drug in its active form even after 30 h of incubation in serum, in contrast to 15% active form present in free drug formulation after 1 h of incubation. It showed strong retention inside the Ehrlich Ascites Carcinoma (EAC) mice models for at least 72 h, suggesting camouflaging ability conferred by RBC membrane. Additionally, the nano formulation retarded the tumor growth rate more efficiently than free drug, with no evident signs of necrotic skin lesions. Histopathological analysis showed a significant reduction in cardiac atrophy, hepato-renal degeneration, and lung metastasis, which resulted in the increased overall survival of mice treated with the nano formulation. Hence, CPT-loaded polymeric micelles when coated with RBC membrane can prove to be a better system for the delivery of poorly soluble drug camptothecin.
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Mohammed HHH, Abbas SH, Hayallah AM, Abuo-Rahma GEDA, Mostafa YA. Novel urea linked ciprofloxacin-chalcone hybrids having antiproliferative topoisomerases I/II inhibitory activities and caspases-mediated apoptosis. Bioorg Chem 2020; 106:104422. [PMID: 33248713 DOI: 10.1016/j.bioorg.2020.104422] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/17/2020] [Accepted: 10/20/2020] [Indexed: 02/08/2023]
Abstract
A novel series of urea-linked ciprofloxacin (CP)-chalcone hybrids 3a-j were synthesized and screened by NCI-60 cancer cell lines as potential cytotoxic agents. Interestingly, compounds 3c and 3j showed remarkable antiproliferative activities against both colon HCT-116 and leukemia SR cancer cells compared to camptothecin, topotecan and staurosporine with IC50 = 2.53, 2.01, 17.36, 12.23 and 3.1 μM for HCT-116 cells, respectively and IC50 = 0.73, 0.64, 3.32, 13.72 and 1.17 μM for leukemia SR cells, respectively. Also, compounds 3c and 3j exhibited inhibitory activities against Topoisomerase (Topo) I with % inhibition = 51.19% and 56.72%, respectively, compared to camptothecin (% inhibition = 60.05%) and Topo IIβ with % inhibition = 60.81% and 60.06%, respectively, compared to topotecan (% inhibition = 71.09%). Furthermore, compound 3j arrested the cell cycle of leukemia SR cells at G2/M phase. It induced apoptosis both intrinsically and extrinsically via activation of proteolytic caspases cascade (caspases-3, -8, and -9), release of cytochrome C from mitochondria, upregulation of proapoptotic Bax and down-regulation of Bcl-2 protein level. Thus, the new ciprofloxacin derivative 3j could be considered as a potential lead for further optimization of antitumor agent against leukemia and colorectal carcinoma.
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Affiliation(s)
- Hamada H H Mohammed
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, New, Minia 61519, Egypt
| | - Samar H Abbas
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
| | - Alaa M Hayallah
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, New, Minia 61519, Egypt; Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Assiut University, 71526, Egypt; Pharmaceutical Chemistry Department, Faculty of Pharmacy, Sphinx University, New Assiut, Egypt.
| | - Gamal El-Din A Abuo-Rahma
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, New, Minia 61519, Egypt.
| | - Yaser A Mostafa
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Assiut University, 71526, Egypt
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Cheng ZY, Hsiao YT, Huang YP, Peng SF, Huang WW, Liu KC, Hsia TC, Way TD, Chung JG. Casticin Induces DNA Damage and Affects DNA Repair Associated Protein Expression in Human Lung Cancer A549 Cells (Running Title: Casticin Induces DNA Damage in Lung Cancer Cells). Molecules 2020; 25:molecules25020341. [PMID: 31952105 PMCID: PMC7024307 DOI: 10.3390/molecules25020341] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 01/09/2020] [Indexed: 12/20/2022] Open
Abstract
Casticin was obtained from natural plants, and it has been shown to exert biological functions; however, no report concerns the induction of DNA damage and repair in human lung cancer cells. The objective of this study was to investigate the effects and molecular mechanism of casticin on DNA damage and repair in human lung cancer A549 cells. Cell viability was determined by flow cytometric assay. The DNA damage was evaluated by 4',6-diamidino-2-phenylindole (DAPI) staining and electrophoresis which included comet assay and DNA gel electrophoresis. The protein levels associated with DNA damage and repair were analyzed by western blotting. The expression and translocation of p-H2A.X were observed by confocal laser microscopy. Casticin reduced total viable cell number and induced DNA condensation, fragmentation, and damage in A549 cells. Furthermore, casticin increased p-ATM at 6 h and increased p-ATR and BRCA1 at 6-24 h treatment but decreased p-ATM at 24-48 h, as well as decreased p-ATR and BRCA1 at 48 h. Furthermore, casticin decreased p-p53 at 6-24 h but increased at 48 h. Casticin increased p-H2A.X and MDC1 at 6-48 h treatment. In addition, casticin increased PARP (cleavage) at 6, 24, and 48 h treatment, DNA-PKcs and MGMT at 48 h in A549 cells. Casticin induced the expressions and nuclear translocation of p-H2AX in A549 cells by confocal laser microscopy. Casticin reduced cell number through DNA damage and condensation in human lung cancer A549 cells.
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Affiliation(s)
- Zheng-Yu Cheng
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan; (Z.-Y.C.); (Y.-T.H.); (S.-F.P.); (W.-W.H.)
| | - Yung-Ting Hsiao
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan; (Z.-Y.C.); (Y.-T.H.); (S.-F.P.); (W.-W.H.)
| | - Yi-Ping Huang
- Department of Physiology, College of Medicine, China Medical University, Taichung 404, Taiwan;
| | - Shu-Fen Peng
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan; (Z.-Y.C.); (Y.-T.H.); (S.-F.P.); (W.-W.H.)
- Department of Medical Research, China Medical University Hospital, Taichung 404, Taiwan
| | - Wen-Wen Huang
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan; (Z.-Y.C.); (Y.-T.H.); (S.-F.P.); (W.-W.H.)
| | - Kuo-Ching Liu
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 404, Taiwan;
| | - Te-Chun Hsia
- Department of Respiratory Therapy, China Medical University, Taichung 404, Taiwan;
- Department of Internal Medicine, China Medical University Hospital, Taichung 404, Taiwan
| | - Tzong-Der Way
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan; (Z.-Y.C.); (Y.-T.H.); (S.-F.P.); (W.-W.H.)
- Correspondence: (T.-D.W.); (J.-G.C.); Tel.: +886-4-2205-3366 (ext. 2531) (T.-D.W. & J.-G.C.); Fax: +886-4-2205-3764 (T.-D.W. & J.-G.C.)
| | - Jing-Gung Chung
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan; (Z.-Y.C.); (Y.-T.H.); (S.-F.P.); (W.-W.H.)
- Correspondence: (T.-D.W.); (J.-G.C.); Tel.: +886-4-2205-3366 (ext. 2531) (T.-D.W. & J.-G.C.); Fax: +886-4-2205-3764 (T.-D.W. & J.-G.C.)
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Mohammed HH, Abuo-Rahma GEDA, Abbas SH, Abdelhafez ESM. Current Trends and Future Directions of Fluoroquinolones. Curr Med Chem 2019; 26:3132-3149. [DOI: 10.2174/0929867325666180214122944] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 10/16/2017] [Accepted: 02/08/2018] [Indexed: 12/12/2022]
Abstract
Fluoroquinolones represent an interesting synthetic class of antimicrobial agents with broad spectrum and potent activity. Since the discovery of nalidixic acid, the prototype of quinolones, several structural modifications to the quinolone nucleus have been carried out for improvement of potency, spectrum of activity, and to understand their structure activity relationship (SAR). The C-7 substituent was reported to have a major impact on the activity. Accordingly, Substitution at C-7 or its N-4-piperazinyl moiety was found to affect potency, bioavailability, and physicochemical properties. Also, it can increase the affinity towards mammalian topoisomerases that may shift quinolones from antibacterial to anticancer candidates. Moreover, the presence of DNA topoisomerases in both eukaryotic and prokaryotic cells makes them excellent targets for chemotherapeutic intervention in antibacterial and anticancer therapies. Based on this concept, several fluoroquionolones derivatives have been synthesized and biologically evaluated as antibacterial, antituberculosis, antiproliferative, antiviral and antifungal agents. This review is an attempt to focus on the therapeutic prospects of fluoroquinolones with an updated account on their atypical applications such as antitubercular and anticancer activities.
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Affiliation(s)
- Hamada H.H. Mohammed
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
| | | | - Samar H. Abbas
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
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Abdel‐Aal MAA, Abdel‐Aziz SA, Shaykoon MSA, Abuo‐Rahma GEA. Towards anticancer fluoroquinolones: A review article. Arch Pharm (Weinheim) 2019; 352:e1800376. [DOI: 10.1002/ardp.201800376] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Mohamed A. A. Abdel‐Aal
- Department of Medicinal Chemistry, Faculty of PharmacyMinia UniversityMinia Egypt
- Department of Pharmaceutical Chemistry, Faculty of PharmacyAl‐Azhar UniversityAssiut Egypt
| | - Salah A. Abdel‐Aziz
- Department of Pharmaceutical Chemistry, Faculty of PharmacyAl‐Azhar UniversityAssiut Egypt
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Li Y, Thambi T, Lee DS. Co-Delivery of Drugs and Genes Using Polymeric Nanoparticles for Synergistic Cancer Therapeutic Effects. Adv Healthc Mater 2018; 7. [PMID: 28941203 DOI: 10.1002/adhm.201700886] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/18/2017] [Indexed: 01/08/2023]
Abstract
Drug and gene delivery systems based on nanoparticles, microparticles and hydrogels have been widely studied for cancer treatment in the past decade. To achieve an efficient and safe delivery, selection of drug and gene delivery carrier is critical. Biocompatible polymeric nanoparticles are considerably promising carrier candidates in delivery of drugs and genes because of their unique chemical and physical properties. However, delivery of a drug or gene sometimes cannot achieve a satisfactory treatment effect. Therefore, co-delivery of dual drugs or co-delivery of a drug and a gene in a polymeric nanoparticle has attracted attention. Such co-delivery systems can overcome multi-drug resistance of chemical drugs and achieve a synergistic therapeutic effect. In this progress report, we summarize recent progress in the preparation and application of polymeric drug and gene co-delivery nanosystems. The remaining challenges and future trends in this field are also included.
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Affiliation(s)
- Yi Li
- Theranostic Macromolecules Research Center and School of Chemical Engineering; Sungkyunkwan University; Suwon Gyeonggi-do 16419 South Korea
| | - Thavasyappan Thambi
- Theranostic Macromolecules Research Center and School of Chemical Engineering; Sungkyunkwan University; Suwon Gyeonggi-do 16419 South Korea
| | - Doo Sung Lee
- Theranostic Macromolecules Research Center and School of Chemical Engineering; Sungkyunkwan University; Suwon Gyeonggi-do 16419 South Korea
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12
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Kue CS, Tan KY, Lam ML, Lee HB. Chick embryo chorioallantoic membrane (CAM): an alternative predictive model in acute toxicological studies for anti-cancer drugs. Exp Anim 2015; 64:129-38. [PMID: 25736707 PMCID: PMC4427727 DOI: 10.1538/expanim.14-0059] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The chick embryo chorioallantoic membrane (CAM) is a preclinical model widely used for
vascular and anti-vascular effects of therapeutic agents in vivo. In this
study, we examine the suitability of CAM as a predictive model for acute toxicology
studies of drugs by comparing it to conventional mouse and rat models for 10 FDA-approved
anticancer drugs (paclitaxel, carmustine, camptothecin, cyclophosphamide, vincristine,
cisplatin, aloin, mitomycin C, actinomycin-D, melphalan). Suitable formulations for
intravenous administration were determined before the average of median lethal dose
(LD50) and median survival dose (SD50) in the CAM were measured
and calculated for these drugs. The resultant ideal LD50 values were correlated
to those reported in the literature using Pearson’s correlation test for both intravenous
and intraperitoneal routes of injection in rodents. Our results showed moderate
correlations (r2=0.42 − 0.68, P<0.005–0.05) between the
ideal LD50 values obtained using the CAM model with LD50 values from
mice and rats models for both intravenous and intraperitoneal administrations, suggesting
that the chick embryo may be a suitable alternative model for acute drug toxicity
screening before embarking on full toxicological investigations in rodents in development
of anticancer drugs.
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Affiliation(s)
- Chin Siang Kue
- Cancer Research Initiative Foundation (CARIF), Sime Darby Medical Centre, 47500 Subang Jaya, Selangor, Malaysia
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13
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14
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Primary hepatocytes and their cultures in liver apoptosis research. Arch Toxicol 2013; 88:199-212. [PMID: 24013573 DOI: 10.1007/s00204-013-1123-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 08/29/2013] [Indexed: 01/18/2023]
Abstract
Apoptosis not only plays a key role in physiological demise of defunct hepatocytes, but is also associated with a plethora of acute and chronic liver diseases as well as with hepatotoxicity. The present paper focuses on the modelling of this mode of programmed cell death in primary hepatocyte cultures. Particular attention is paid to the activation of spontaneous apoptosis during the isolation of hepatocytes from the liver, its progressive manifestation upon the subsequent establishment of cell cultures and simultaneously to strategies to counteract this deleterious process. In addition, currently applied approaches to experimentally induce controlled apoptosis in this in vitro setting for mechanistic research purposes and thereby its detection using relevant biomarkers are reviewed.
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15
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Weiland T, Klein K, Zimmermann M, Speicher T, Venturelli S, Berger A, Bantel H, Königsrainer A, Schenk M, Weiss TS, Wendel A, Schwab M, Bitzer M, Lauer UM. Selective protection of human liver tissue in TNF-targeting of cancers of the liver by transient depletion of adenosine triphosphate. PLoS One 2012; 7:e52496. [PMID: 23272249 PMCID: PMC3525543 DOI: 10.1371/journal.pone.0052496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 11/19/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Tumor necrosis factor alpha (TNF) is able to kill cancer cells via receptor-mediated cell death requiring adenosine triphosphate (ATP). Clinical usage of TNF so far is largely limited by its profound hepatotoxicity. Recently, it was found in the murine system that specific protection of hepatocytes against TNF's detrimental effects can be achieved by fructose-mediated ATP depletion therein. Before employing this quite attractive selection principle in a first clinical trial, we here comprehensively investigated the interdependence between ATP depletion and TNF hepatotoxicity in both in vitro and ex vivo experiments based on usage of primary patient tissue materials. METHODS Primary human hepatocytes, and both non-tumorous and tumorous patient-derived primary liver tissue slices were used to elucidate fructose-induced ATP depletion and TNF-induced cytotoxicity. RESULTS PHH as well as tissue slices prepared from non-malignant human liver specimen undergoing a fructose-mediated ATP depletion were both demonstrated to be protected against TNF-induced cell death. In contrast, due to tumor-specific overexpression of hexokinase II, which imposes a profound bypass on hepatocytic-specific fructose catabolism, this was not the case for human tumorous liver tissues. CONCLUSION Normal human liver tissues can be protected transiently against TNF-induced cell death by systemic pretreatment with fructose used in non-toxic/physiologic concentrations. Selective TNF-targeting of primary and secondary tumors of the liver by transient and specific depletion of hepatocytic ATP opens up a new clinical avenue for the TNF-based treatment of liver cancers.
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Affiliation(s)
- Timo Weiland
- Department of Internal Medicine I, Medical University Hospital, Tuebingen, Germany
| | - Kathrin Klein
- Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
| | - Martina Zimmermann
- Department of Internal Medicine I, Medical University Hospital, Tuebingen, Germany
| | - Tobias Speicher
- Department of Biology, Institute of Cell Biology, ETH Zürich, Switzerland
| | - Sascha Venturelli
- Department of Internal Medicine I, Medical University Hospital, Tuebingen, Germany
| | - Alexander Berger
- Department of Internal Medicine I, Medical University Hospital, Tuebingen, Germany
| | - Heike Bantel
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Alfred Königsrainer
- Department of General, Visceral & Transplant Surgery, University Hospital, Tuebingen, Germany
| | - Martin Schenk
- Department of General, Visceral & Transplant Surgery, University Hospital, Tuebingen, Germany
| | - Thomas S. Weiss
- Center for Liver Cell Research, University Hospital, Regensburg, Germany
| | - Albrecht Wendel
- Interfaculty Center for Pharmacogenomics and Drug Research (ICEPHA), University of Tuebingen, Germany
| | - Matthias Schwab
- Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
- Department of Clinical Pharmacology, Institute of Experimental and Clinical Pharmacology and Toxicology, Medical University Hospital, Tuebingen, Germany
| | - Michael Bitzer
- Department of Internal Medicine I, Medical University Hospital, Tuebingen, Germany
| | - Ulrich M. Lauer
- Department of Internal Medicine I, Medical University Hospital, Tuebingen, Germany
- * E-mail:
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16
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Lu J, Miyakawa K, Roth RA, Ganey PE. Tumor necrosis factor-alpha potentiates the cytotoxicity of amiodarone in Hepa1c1c7 cells: roles of caspase activation and oxidative stress. Toxicol Sci 2012; 131:164-78. [PMID: 23042730 DOI: 10.1093/toxsci/kfs289] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Amiodarone (AMD), a class III antiarrhythmic drug, causes idiosyncratic hepatotoxicity in human patients. We demonstrated previously that tumor necrosis factor-alpha (TNF-α) plays an important role in a rat model of AMD-induced hepatotoxicity under inflammatory stress. In this study, we developed a model in vitro to study the roles of caspase activation and oxidative stress in TNF potentiation of AMD cytotoxicity. AMD caused cell death in Hepa1c1c7 cells, and TNF cotreatment potentiated its toxicity. Activation of caspases 9 and 3/7 was observed in AMD/TNF-cotreated cells, and caspase inhibitors provided minor protection from cytotoxicity. Intracellular reactive oxygen species (ROS) generation and lipid peroxidation were observed after treatment with AMD and were further elevated by TNF cotreatment. Adding water-soluble antioxidants (trolox, N-acetylcysteine, glutathione, or ascorbate) produced only minor attenuation of AMD/TNF-induced cytotoxicity and did not influence the effect of AMD alone. On the other hand, α-tocopherol (TOCO), which reduced lipid peroxidation and ROS generation, prevented AMD toxicity and caused pronounced reduction in cytotoxicity from AMD/TNF cotreatment. α-TOCO plus a pancaspase inhibitor completely abolished AMD/TNF-induced cytotoxicity. In summary, activation of caspases and oxidative stress were observed after AMD/TNF cotreatment, and caspase inhibitors and a lipid-soluble free-radical scavenger attenuated AMD/TNF-induced cytotoxicity.
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Affiliation(s)
- Jingtao Lu
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, USA
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17
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Liu J, Sun RWY, Leung CH, Lok CN, Che CM. Inhibition of TNF-α stimulated nuclear factor-kappa B (NF-κB) activation by cyclometalated platinum(ii) complexes. Chem Commun (Camb) 2012; 48:230-2. [DOI: 10.1039/c1cc15317j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Collier FM, Loving A, Baker AJ, McLeod J, Walder K, Kirkland MA. RTKN2 Induces NF-KappaB Dependent Resistance to Intrinsic Apoptosis in HEK Cells and Regulates BCL-2 Genes in Human CD4(+) Lymphocytes. J Cell Death 2009; 2:9-23. [PMID: 26124677 PMCID: PMC4474337 DOI: 10.4137/jcd.s2891] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The gene for Rhotekin 2 (RTKN2) was originally identified in a promyelocytic cell line resistant to oxysterol-induced apoptosis. It is differentially expressed in freshly isolated CD4+ T-cells compared with other hematopoietic cells and is down-regulated following activation of the T-cell receptor. However, very little is known about the function of RTKN2 other than its homology to Rho-GTPase effector, rhotekin, and the possibility that they may have similar roles. Here we show that stable expression of RTKN2 in HEK cells enhanced survival in response to intrinsic apoptotic agents; 25-hydroxy cholesterol and camptothecin, but not the extrinsic agent, TNFα. Inhibitors of NF-KappaB, but not MAPK, reversed the resistance and mitochondrial pro-apoptotic genes, Bax and Bim, were down regulated. In these cells, there was no evidence of RTKN2 binding to the GTPases, RhoA or Rac2. Consistent with the role of RTKN2 in HEK over-expressing cells, suppression of RTKN2 in primary human CD4+ T-cells reduced viability and increased sensitivity to 25-OHC. The expression of the pro-apoptotic genes, Bax and Bim were increased while BCL-2 was decreased. In both cell models RTKN2 played a role in the process of intrinsic apoptosis and this was dependent on either NF-KappaB signaling or expression of downstream BCL-2 genes. As RTKN2 is a highly expressed in CD4+ T-cells it may play a role as a key signaling switch for regulation of genes involved in T-cell survival.
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Affiliation(s)
- Fiona M Collier
- Barwon Biomedical Research, Geelong Hospital, Barwon Health, Ryrie St, Geelong, Victoria, 3227, Australia. ; Metabolic Research Unit, School of Medicine and Institute for Technology Research and Innovation, Deakin University, Waurn Ponds, Victoria, 3217, Australia
| | - Andrea Loving
- Barwon Biomedical Research, Geelong Hospital, Barwon Health, Ryrie St, Geelong, Victoria, 3227, Australia
| | - Adele J Baker
- Department of Malignant Haematology and Stem Cell Transplantation, The Alfred Hospital, Melbourne, Victoria, 3181, Australia
| | - Janet McLeod
- School of Medicine, Deakin University, Waurn Ponds, Victoria, 3217, Australia
| | - Ken Walder
- Metabolic Research Unit, School of Medicine and Institute for Technology Research and Innovation, Deakin University, Waurn Ponds, Victoria, 3217, Australia
| | - Mark A Kirkland
- Barwon Biomedical Research, Geelong Hospital, Barwon Health, Ryrie St, Geelong, Victoria, 3227, Australia
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19
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Sato T, Matsuo Y, Honma T, Yokoyama S. In Silico Functional Profiling of Small Molecules and Its Applications. J Med Chem 2008; 51:7705-16. [DOI: 10.1021/jm800504q] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Tomohiro Sato
- Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan, and Department of Supramolecular Biology, International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Yo Matsuo
- Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan, and Department of Supramolecular Biology, International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Teruki Honma
- Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan, and Department of Supramolecular Biology, International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Shigeyuki Yokoyama
- Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan, and Department of Supramolecular Biology, International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
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20
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Shaw PJ, Ganey PE, Roth RA. Tumor necrosis factor alpha is a proximal mediator of synergistic hepatotoxicity from trovafloxacin/lipopolysaccharide coexposure. J Pharmacol Exp Ther 2008; 328:62-8. [PMID: 18820134 DOI: 10.1124/jpet.108.143792] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The use of trovafloxacin (TVX), a fluoroquinolone antibiotic, was severely restricted because of an association of TVX therapy with idiosyncratic hepatotoxicity in patients. The mechanisms underlying idiosyncratic toxicity are unknown; however, one hypothesis is that an inflammatory stress can render an individual sensitive to the drug. Previously, we reported that treatment of mice with TVX and lipopolysaccharide (LPS) induced tumor necrosis factor (TNF) alpha-dependent liver injury, whereas TVX or LPS treatment alone was nontoxic. The goal of this study was to elucidate the role of TNFalpha in TVX/LPS-induced liver injury. TNF receptor (TNFR) 1 p55(-/-) and TNFR2 (p75(-/-)) mice were protected from hepatotoxicity caused by TVX/LPS coexposure, suggesting that TVX/LPS-induced liver injury requires both TNF receptors. TNFalpha inhibition using etanercept significantly reduced the TVX/LPS-induced increases in the plasma concentrations of several cytokines around the time of onset of liver injury. However, despite the reduction in chemokines, etanercept treatment did not affect the TVX/LPS-induced hepatic accumulation of neutrophils. In addition, etanercept treatment attenuated TVX/LPS induction of plasminogen activator inhibitor-1, and this was associated with a reduction in hepatic fibrin deposition. Mice treated with TVX and a nontoxic dose of TNFalpha also developed liver injury. In summary, TNFalpha acts through p55 and p75 receptors to precipitate an innocuous inflammatory cascade. TVX enhances this cascade, converting it into one that results in hepatocellular injury.
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Affiliation(s)
- Patrick J Shaw
- Department of Pharmacology and Toxicology, National Food Safety and Toxicology Center, Center for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA
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21
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Leu JIJ, George DL. Hepatic IGFBP1 is a prosurvival factor that binds to BAK, protects the liver from apoptosis, and antagonizes the proapoptotic actions of p53 at mitochondria. Genes Dev 2008; 21:3095-109. [PMID: 18056423 DOI: 10.1101/gad.1567107] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Liver is generally refractory to apoptosis induced by the p53 tumor suppressor protein, but the molecular basis remains poorly understood. Here we show that p53 transcriptional activation leads to enhanced expression of hepatic IGFBP1 (insulin-like growth factor-binding protein-1). Exhibiting a previously unanticipated role, a portion of intracellular IGFBP1 protein localizes to mitochondria where it binds to the proapoptotic protein BAK and hinders BAK activation and apoptosis induction. Interestingly, in many cells and tissues p53 also has a direct apoptotic function at mitochondria that includes BAK binding and activation. When IGFBP1 is in a complex with BAK, formation of a proapoptotic p53/BAK complex and apoptosis induction are impaired, both in cultured cells and in liver. In contrast, livers of IGFBP1-deficient mice exhibit spontaneous apoptosis that is accompanied by p53 mitochondrial accumulation and evidence of BAK oligomerization. These data support the importance of BAK as a mediator of p53's mitochondrial function. The results also identify IGFBP1 as a negative regulator of the BAK-dependent pathway of apoptosis, whose expression integrates the transcriptional and mitochondrial functions of the p53 tumor suppressor protein.
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Affiliation(s)
- J I-Ju Leu
- Department of Genetics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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22
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Dünstl G, Weiland T, Schlaeger C, Nüssler A, Künstle G, Wendel A. Activation of an alternative death receptor-induced signaling pathway in human hepatocytes under caspase arrest. Arch Biochem Biophys 2007; 462:140-9. [PMID: 17466932 DOI: 10.1016/j.abb.2007.03.030] [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] [Received: 12/12/2006] [Revised: 03/09/2007] [Accepted: 03/21/2007] [Indexed: 01/13/2023]
Abstract
UNLABELLED Caspases are thought to be essential in execution of death receptor-induced apoptosis. However, recent findings suggest the existence of alternative pathways independent of caspases. We provide further evidence for such signaling in hepatocytes. RESULTS Death receptor-induced activation of caspases and apoptosis in primary murine hepatocytes was completely blocked in presence of 1.5 microM N-benzyloxycarbonyl-Val-Ala-Asp-(O-methyl)fluoromethylketone (zVAD-fmk). Whereas the same concentration of the inhibitor was sufficient to block TNF receptor 1-, CD95- or TRAIL receptor 1/-2-induced activation of caspases in primary human hepatocytes or HepG2 cells, complete prevention apoptotic cell death needed almost 100 microM zVAD-fmk. Under caspase-inhibitory but non-protective conditions, i.e. at 1.5 microM zVAD-fmk, various serine protease inhibitors prevented apoptosis-like cell death. Neither sole arrest of caspases nor inhibition of serine proteases alone protected human hepatocytes. CONCLUSION Human but not murine hepatocytes bear the potential to activate a permissive, serine protease inhibitor-sensitive alternative death signaling pathway under caspase-inhibitory conditions.
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Affiliation(s)
- Georg Dünstl
- Biochemical Pharmacology, Faculty of Biology, University of Konstanz, Konstanz, Germany
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23
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Dolfini E, Elli L, Roncoroni L, Costa B, Colleoni MP, Lorusso V, Ramponi S, Braidotti P, Ferrero S, Falini ML, Bardella MT. Damaging effects of gliadin on three-dimensional cell culture model. World J Gastroenterol 2005; 11:5973-7. [PMID: 16273608 PMCID: PMC4436719 DOI: 10.3748/wjg.v11.i38.5973] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the effects of gliadin on the oxidative environment in the “ in vivo-like ”model of a three-dimensional cell culture system.
METHODS: LoVo cell line (intestinal adenocarcinoma) multicellular spheroids were treated with digested gliadin (with albumin used as a control). Spheroid volumes, cell viability and morphology, lactate dehydrogenase (LDH) release, content of reduced glutathione (GSH) and activity of GSH-related enzymes were examined. The data were statistically analyzed using the Student’s t-test (P<0.05). was considered statistically significant.
RESULTS: Gliadin reduced cell viability (from 20% to 60%) and led to morphological alterations characterized by apoptotic findings and cytoskeletal injuries. LDH activity increased. The content of GSH reduced (-20% vs controls), and activity of GSH-related enzymes was significantly inhibited.
CONCLUSION: Gliadin treatment induces an imbalance in the antioxidative mechanism of cells cultured by the three-dimensional technique. This alteration may explain the cell damage directly caused by gliadin and the subsequent morphological abnormalities.
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Affiliation(s)
- Ersilia Dolfini
- Department of Gastroenterology, Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena IRCCS, Via F. Sforza 35, Milan 20122, Italy
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24
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Kresse M, Latta M, Künstle G, Riehle HM, van Rooijen N, Hentze H, Tiegs G, Biburger M, Lucas R, Wendel A. Kupffer Cell-Expressed Membrane-Bound TNF Mediates Melphalan Hepatotoxicity via Activation of Both TNF Receptors. THE JOURNAL OF IMMUNOLOGY 2005; 175:4076-83. [PMID: 16148157 DOI: 10.4049/jimmunol.175.6.4076] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Isolated hepatic perfusion of nonresectable liver cancer using the combination of TNF and melphalan can be associated with a treatment-related hepatotoxicity. We investigated whether, apart from TNF, also melphalan is cytotoxic in primary murine liver cells in vitro and investigated mediators, mode of cell death, and cell types involved. Melphalan induced a caspase-dependent apoptosis in hepatocytes, which was not seen in liver cell preparations depleted of Kupffer cells. Neutralization of TNF prevented melphalan-induced apoptosis and liver cells derived from mice genetically deficient in either TNFR 1 or 2, but not from lpr mice lacking a functional CD95 receptor, were completely resistant. Cell-cell contact between hepatocytes and Kupffer cells was required for apoptosis to occur. Melphalan increased membrane-bound but not secreted TNF in Kupffer cells and inhibited recombinant TNF-alpha converting enzyme in vitro. Melphalan induced also severe hepatotoxicity in the isolated recirculating perfused mouse liver from wild-type mice but not from TNFR 1 or 2 knockout mice. In conclusion, this study shows that melphalan elicits membrane TNF on Kupffer cells due to inhibition of TNF processing and thereby initiates apoptosis of hepatocytes via obligatory activation of both TNFRs. The identification of this novel mechanism allows a causal understanding of melphalan-induced hepatotoxicity.
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Affiliation(s)
- Matthias Kresse
- Biochemical Pharmacology, University of Konstanz, Konstanz, Germany
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25
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Lieman JH, Worley LA, Harbour JW. Loss of Rb-E2F Repression Results in Caspase-8-mediated Apoptosis through Inactivation of Focal Adhesion Kinase. J Biol Chem 2005; 280:10484-90. [PMID: 15640164 DOI: 10.1074/jbc.m409371200] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Molecular hardwiring of the cell cycle to the apoptotic machinery is a critical tumor suppressor mechanism for eliminating hyperproliferative cells. Deregulation of the Rb-E2F repressor complex by genetic deletion or functional inhibition of Rb triggers apoptosis through both the intrinsic (caspase-9 mediated) and extrinsic (caspase-8 mediated) death pathways. Induction of the intrinsic pathway has been studied extensively and involves release of free E2F and direct transcriptional activation of E2F-responsive apoptotic genes such as ARF, APAF1, and CASP9. In contrast, the mechanisms leading to activation of the extrinsic pathway are less well understood. There is growing evidence that Rb-E2F perturbation induces the extrinsic pathway, at least in part, through derepression (as opposed to transactivation) of apoptotic genes. Here, we explore this possibility using cells in which Rb-E2F complexes are displaced from promoters without stimulating E2F transactivation. This derepression of Rb-E2F-regulated genes leads to apoptosis through inactivation of focal adhesion kinase and activation of caspase-8. These findings reveal a new mechanistic link between Rb-E2F and the extrinsic (caspase 8-mediated) apoptotic pathway.
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Affiliation(s)
- Jonathan H Lieman
- Department of Ophthalmology & Visual Sciences, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, Missouri 63110, USA
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26
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N/A. N/A. Shijie Huaren Xiaohua Zazhi 2004; 12:1957-1959. [DOI: 10.11569/wcjd.v12.i8.1957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
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