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Małecka M, Skoczyńska A, Goodman DM, Hartinger CG, Budzisz E. Biological properties of ruthenium(II)/(III) complexes with flavonoids as ligands. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213849] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Gharbavi M, Johari B, Mousazadeh N, Rahimi B, Leilan MP, Eslami SS, Sharafi A. Hybrid of niosomes and bio-synthesized selenium nanoparticles as a novel approach in drug delivery for cancer treatment. Mol Biol Rep 2020; 47:6517-6529. [PMID: 32767222 DOI: 10.1007/s11033-020-05704-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 08/01/2020] [Indexed: 02/08/2023]
Abstract
The current study intends to investigate a novel drug delivery system (DDS) based on niosomes structure (NISM) and bovine serum albumin (BSA) which was formulated to BSA coated NISM (NISM-B). Also, selenium nanoparticles (SeNPs) have been prepared by BSA mediated biosynthesis. Finally, the NISM-B was hybridized with SeNPs and was formulated as NISM-B@SeNPs for drug delivery applications. Physicochemical properties of all samples were characterized by UV-Vis spectroscopy, FT-IR, DLS, FESEM, and EDX techniques. The cytotoxicity of all samples against A549 cell line was assessed by cell viability analysis and flow cytometry for apoptotic cells as well as RT-PCR for the expression of MDR-1, Bax, and Bcl-2 genes. Besides, in vivo biocompatibility was performed by LD50 assay to evaluate the acute toxicity. The proposed formulation has a regular spherical shape and approximately narrow size distribution with proper zeta-potential values; the proposed DDS revealed a good biocompatibility. The compound showed a significant cytotoxic effect against A549 cell line. Although the Bax/Bcl-2 expression ratio was significantly in NISM-B@SeNPs- treated cancer cells, the expression of MDR-1 was non-significantly lower in NISM-B@SeNPs-treated cancer cells. The obtained results suggest that the proposed DDS presents a promising approach for drug delivery, co-delivery and multifunctional biomedicine applications.
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Affiliation(s)
- Mahmoud Gharbavi
- Student Research Committee, Zanjan University of Medical Sciences, Zanjan, Iran.,Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Pharmaceutical Biotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Behrooz Johari
- Department of Medical Biotechnology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Navid Mousazadeh
- Department of Medical Biotechnology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Bahareh Rahimi
- Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Milad Parvinzad Leilan
- Department of Medical Biotechnology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Seyed Sadegh Eslami
- Department of Genetics and Pathology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Ali Sharafi
- Zanjan Pharmaceutical Biotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.
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El-Hefny IM, Al Senosy NK, Hozayen WG, Ahmed AE, Diab A, Basal WT. Evaluation of the Cytotoxicity and Apoptotic Induction in Human Liver Cell Lines Exposed to Three Food Additives. Recent Pat Food Nutr Agric 2020; 11:193-201. [PMID: 32065108 DOI: 10.2174/2212798411666200217124630] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 11/26/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Rapid lifestyle, especially among people living in urban areas, has led to increasing reliance on the processed food market. Unfortunately, harmful effects caused by the excessive use of food additives in such type of industry are often neglected. OBJECTIVE This proposal investigates in vitro cytotoxic and apoptotic effects of three food preservatives commonly consumed in daily meals; sodium sulphite, boric acid, and benzoic acid. METHODS The effect of the three preservatives on cell viability was tested on two different cell lines; normal liver cell line THLE2 and human hepatocellular carcinoma cancer cell line HepG2 using MTT assay. Cell cycle arrest was measured using flow cytometry by propidium iodide. Measurement of expression levels of two central genes, p53 and bcl-2 that play key roles in cell cycle and apoptosis was carried out in HepG2 cells using real time-PCR. RESULTS Although the effect was more significantly realized in the HepG2 cell line, the viability of both cell lines was decreased by all of the three tested compounds. Flow cytometric analysis of HepG2 cells treated with sodium sulphite, boric acid, and benzoic acid has revealed an increase in G2/M phase cell cycle arrest. In Sodium sulphite and boric acid-treated cells, expression levels of p53 were up-regulated, while that of the Bcl2 was significantly down-regulated. On the other hand, Benzoic acid has shown an anti-apoptotic feature based on the increased expression levels of Bcl-2 in treated cells. CONCLUSION In conclusion, all of the tested compounds have decreased the cell line viability and induced both cell cycle arrest and apoptotic events indicating their high potential of being cytotoxic and genotoxic materials.
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Affiliation(s)
- Ingy M El-Hefny
- Faculty of Biotechnology, October University for Modern Sciences and Arts, (MSA), Wahat Road, 6th of October City, Egypt
| | - Neima K Al Senosy
- Department of Genetics, Faculty of Agriculture, Ain Shams University, Shubra el-Kheima, Egypt
| | - Walaa G Hozayen
- Beni-Suef University, Faculty of Postgraduate Studies for Advanced Sciences, Department of Biotechnology and Life Sciences, Beni-Suef, Egypt
| | - Amr E Ahmed
- Beni-Suef University, Faculty of Postgraduate Studies for Advanced Sciences, Department of Biotechnology and Life Sciences, Beni-Suef, Egypt
| | - Ayman Diab
- Faculty of Biotechnology, October University for Modern Sciences and Arts, (MSA), Wahat Road, 6th of October City, Egypt
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Wan Q, Shen Y, Zhao H, Wang B, Zhao L, Zhang Y, Bu X, Wan M, Shen C. Impaired DNA double‐strand breaks repair by kinesin family member 4A inhibition renders human H1299 non‐small‐cell lung cancer cells sensitive to cisplatin. J Cell Physiol 2018; 234:10360-10371. [DOI: 10.1002/jcp.27703] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 10/15/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Qing Wan
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
- Center of Clinical Laboratory Medicine, Zhongda Hospital, Southeast University Nanjing China
| | - Yong Shen
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Huzi Zhao
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Bei Wang
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Lei Zhao
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Yongchen Zhang
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Xiaodong Bu
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Meiling Wan
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
| | - Chuanlu Shen
- Department of Pathology and Pathophysiology Medical School, Southeast University Nanjing China
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A better experimental method to detect the sensitivity of cancer cells to anticancer drugs after adenovirus-mediated introduction of two kinds of p53 in vivo. Anticancer Drugs 2015; 26:852-9. [PMID: 26164152 PMCID: PMC4521903 DOI: 10.1097/cad.0000000000000259] [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] [Indexed: 11/25/2022]
Abstract
p53 plays an important role in drug responses by regulating cell cycle progression and inducing programmed cell death. The C-terminal of p53 self-regulates the protein negatively; however, whether it affects the sensitivity of cancer cells to anticancer drugs is unclear. In this study, two experimental methods were used to compare the sensitivity to anticancer drugs of human lung 801D cancer cells transfected with adenovirus bearing either full-length p53 or the deleted-C-terminal p53 in vivo. Adenovirus-mediated deliveries of full-length or deleted-C-terminal p53 were performed after development of tumors (the first method) or by infection into cells before xenotransplantation (the second method). The results showed that infection with the deleted-C-terminal p53 increased 801D cell sensitivity to anticancer drugs in the second, but not in the first method, as indicated by greater tumor-inhibition rates. In addition, compared with the first method, the second method resulted in viruses with more uniformly infected cells and the infection rates between groups were similar. This yielded smaller within-group variations and greater uniformity among transplanted tumors. The second method could circumvent the difficulties associated with intratumoral injection.
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Kim HR, Son BH, Lee SY, Chung KH, Oh SM. The Role of p53 in Marijuana Smoke Condensates-induced Genotoxicity and Apoptosis. ENVIRONMENTAL HEALTH AND TOXICOLOGY 2012; 27:e2012017. [PMID: 23106039 PMCID: PMC3479268 DOI: 10.5620/eht.2012.27.e2012017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 08/14/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVES Marijuana is one of the most frequently abused drug in Korea and its adverse health effects are controversial. p53 is known to be crucial in regulating the DNA damage responses, and adverse effects can occur when it is regulated by marijuana smoke. We evaluated a role of p53 on genotoxic effect and apoptosis in lung cancer cells exposed to marijuana smoke condensates (MSCs). METHODS The p53-related genotoxicity and apoptosis of MSCs were evaluated using in vitro bioassay, viz., comet assay, cytokinesis-block micronucleus assay and apoptosis assay. We used two cell lines with differential p53 expression (p53-wildtype (WT) H460 and p53-null H1299). RESULTS MSCs significantly increased DNA breakages and chromosomal changes in p53-WT H460 and p53-null H1299 cells. The genotoxicity induced by MSCs in p53-null H1299 cells showed greater sensitivity than p53-WT H460 cells. Moreover, MSCs showed a significant increase in reactive oxygen species production and apoptosis. The apoptotic responses induced by MSCs were higher in p53-WT H460 cells than in p53-null H1299 cells. Significantly increased mRNA expression or apoptosis related genes, including p53, caspase-3, and Bax/Bcl-2 ratio were observed in the p53-WT H460 cells exposed to MSCs. CONCLUSIONS These results suggest that MSCs induce DNA/chromosomal damages and apoptosis in human lung cancer cells and p53 plays an important role in the cellular response to MSCs. The present study may have border implications for our understanding of pulmonary diseases.
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Affiliation(s)
- Ha Ryong Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Bo Hee Son
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Soo Yeun Lee
- College of Pharmacy, Keimyung University, Daegu, Korea
| | | | - Seung Min Oh
- Fusion Technology Laboratory, Hoseo University, Asan, Korea
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Kim KH, Yoo HY, Joo KM, Jung Y, Jin J, Kim Y, Yoon SJ, Choi SH, Seol HJ, Park WY, Nam DH. Time-course analysis of DNA damage response-related genes after in vitro radiation in H460 and H1229 lung cancer cell lines. Exp Mol Med 2011; 43:419-26. [PMID: 21633183 DOI: 10.3858/emm.2011.43.7.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Radiation is the most useful treatment modality for cancer patients. It initiates a series of signal cascades such as DNA damage response (DDR) signaling for repairing damaged DNA, arresting the cell cycle, and inducing cell death. Until now, few genes have been found to be regulated by radiation, which explains the molecular mechanisms of cellular responses to radiation. Although the transcriptional changes caused by radiation have been widely investigated, little is known about the direct evidence for the transcriptional control of DDR-related genes. Here, we examined the radiosensitivity of two non-small cell lung cancer cell lines (H460 and H1299), which have different p53 status. We monitored the time-dependent changes of 24 DDR-related gene expressions via microarray analysis. Based on the basal expression levels and temporal patterns, we further classified 24 DDR-related genes into four subgroups. Then, we also addressed the protein levels of several DDR-related genes such as TopBP1, Chk1 and Chk2, confirming the results of microarray analysis. Together, these results indicate that the expression patterns of DDR-related genes are associated with radiosensitivity and with the p53 statuses of H460 and H1299, which adds to the understanding of the complex biological responses to radiation.
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Affiliation(s)
- Kang Ho Kim
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Stewart DJ. Tumor and host factors that may limit efficacy of chemotherapy in non-small cell and small cell lung cancer. Crit Rev Oncol Hematol 2010; 75:173-234. [PMID: 20047843 PMCID: PMC2888634 DOI: 10.1016/j.critrevonc.2009.11.006] [Citation(s) in RCA: 152] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 11/19/2009] [Accepted: 11/27/2009] [Indexed: 12/19/2022] Open
Abstract
While chemotherapy provides useful palliation, advanced lung cancer remains incurable since those tumors that are initially sensitive to therapy rapidly develop acquired resistance. Resistance may arise from impaired drug delivery, extracellular factors, decreased drug uptake into tumor cells, increased drug efflux, drug inactivation by detoxifying factors, decreased drug activation or binding to target, altered target, increased damage repair, tolerance of damage, decreased proapoptotic factors, increased antiapoptotic factors, or altered cell cycling or transcription factors. Factors for which there is now substantial clinical evidence of a link to small cell lung cancer (SCLC) resistance to chemotherapy include MRP (for platinum-based combination chemotherapy) and MDR1/P-gp (for non-platinum agents). SPECT MIBI and Tc-TF scanning appears to predict chemotherapy benefit in SCLC. In non-small cell lung cancer (NSCLC), the strongest clinical evidence is for taxane resistance with elevated expression or mutation of class III beta-tubulin (and possibly alpha tubulin), platinum resistance and expression of ERCC1 or BCRP, gemcitabine resistance and RRM1 expression, and resistance to several agents and COX-2 expression (although COX-2 inhibitors have had minimal impact on drug efficacy clinically). Tumors expressing high BRCA1 may have increased resistance to platinums but increased sensitivity to taxanes. Limited early clinical data suggest that chemotherapy resistance in NSCLC may also be increased with decreased expression of cyclin B1 or of Eg5, or with increased expression of ICAM, matrilysin, osteopontin, DDH, survivin, PCDGF, caveolin-1, p21WAF1/CIP1, or 14-3-3sigma, and that IGF-1R inhibitors may increase efficacy of chemotherapy, particularly in squamous cell carcinomas. Equivocal data (with some positive studies but other negative studies) suggest that NSCLC tumors with some EGFR mutations may have increased sensitivity to chemotherapy, while K-ras mutations and expression of GST-pi, RB or p27kip1 may possibly confer resistance. While limited clinical data suggest that p53 mutations are associated with resistance to platinum-based therapies in NSCLC, data on p53 IHC positivity are equivocal. To date, resistance-modulating strategies have generally not proven clinically useful in lung cancer, although small randomized trials suggest a modest benefit of verapamil and related agents in NSCLC.
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Affiliation(s)
- David J Stewart
- Department of Thoracic/Head & Neck Medical Oncology, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA.
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Grazul M, Budzisz E. Biological activity of metal ions complexes of chromones, coumarins and flavones. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2009.06.015] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Huang CL, Yokomise H, Miyatake A. Clinical significance of the p53 pathway and associated gene therapy in non-small cell lung cancers. Future Oncol 2007; 3:83-93. [PMID: 17280505 DOI: 10.2217/14796694.3.1.83] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Many molecules, including several regulators and various target genes, are involved in the biological functions of p53, thus making the p53 pathway rather complicated. However, recent clinical studies have demonstrated that most human cancers have an abnormality in some of the molecules associated with the p53 pathway. Most non-small cell lung cancers (NSCLCs) have either mutations of p53, a reduced p14 alternate reading frame expression, a reduced herpesvirus-associated ubiquitin-specific protease expression or a reduced p33 inhibitor of growth gene1b expression. As a result, the balance of expression of p53 target genes, such as p21, Bax and PUMA, regulates the biological behavior and determines the fate of tumor cells. To date, many studies on cancer gene therapy using these molecules associated with the p53 pathway have been performed to develop new strategies for treating NSCLC patients. Thus, the establishment of a comprehensive and simple evaluation protocol for the p53 pathway is required for clinical use.
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Affiliation(s)
- Cheng-long Huang
- Second Department of Surgery, Faculty of Medicine, Kagawa University, 1750-1, Mikicho, Kita-gun, Kagawa 761-0793, Japan.
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Kosmider B, Zawlik I, Liberski PP, Osiecka R, Zyner E, Ochocki J, Bartkowiak J. Evaluation of P53 and BAX gene expression and induction of apoptosis and necrosis by the cis-Pt(II) complex of 3-aminoflavone in comparison with cis-diamminedichloroplatinum(II) (cis-DDP) in human lymphocytes. Mutat Res 2006; 604:28-35. [PMID: 16443387 DOI: 10.1016/j.mrgentox.2005.12.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Revised: 11/01/2005] [Accepted: 12/03/2005] [Indexed: 01/10/2023]
Abstract
Currently cis-diamminedichloroplatinum(II) (cis-DDP) is one of the most commonly applied compounds in chemotherapy of many types of cancer. However, a drawback is that its effectiveness presents with many side effects. Therefore, human normal lymphocytes were chosen as a model system to study cis-bis(3-aminoflavone)dichloroplatinum(II) (the cis-Pt(II) complex of 3-aminoflavone) in comparison with cis-DDP. We examined the effect of both tested compounds on cell viability and induction of apoptosis and necrosis. Trypan blue and acridine orange/ethidium bromide staining were carried out, as well as quantitative analysis of the apoptotic signal of P53 and BAX induction caused by the cis-Pt(II) complex of 3-aminoflavone in comparison with cis-DDP. cis-DDP induced a decrease of cell viability and led to a higher increase in necrosis and apoptosis than did the cis-Pt(II) complex of 3-aminoflavone. Moreover, at the molecular level cis-DDP increased P53 and BAX expression in comparison with the other tested compound. The cis-Pt(II) complex of 3-aminoflavone showed a weaker genotoxic effect in normal lymphocytes in comparison with cis-DDP, which was a stronger inducer of apoptosis and necrosis.
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Affiliation(s)
- Beata Kosmider
- Department of Cytogenetics and Plant Molecular Biology, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland.
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Kosmider B, Wojcik I, Osiecka R, Bartkowiak J, Zyner E, Ochocki J, Liberski P. Enhanced P53 and BAX gene expression and apoptosis in A549 cells by cis-Pt(II) complex of 3-aminoflavone in comparison with cis-DDP. Invest New Drugs 2005; 23:287-97. [PMID: 16012788 DOI: 10.1007/s10637-005-1437-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Lung cancer remains one of the most common causes of cancer-related death worldwide. Approximately 80% is histologically non-small cell lung carcinoma (NSCLC) and in about 70% of patients it is an unresectable type. Clinical studies indicated that application of platinum derivatives caused good results and combinations of platinum with other agents could improve median survivals. In view of the central problem of sufficient efficiency of drugs in chemotherapy, efforts have focused on the development of alternative platinum-based analogues that can be more effective in cancer treatment. cis-bis(3-aminoflavone)dichloroplatinum(II) (cis-Pt(II) complex of 3-aminoflavone) represents a novel class of platinum-based potential antitumour agents. In order to evaluate the degree of apoptosis, acridine orange/ethidium bromide and Hoechst 33258/propidum iodide double staining as well as RT-PCR (P53 and BAX expression evaluation) were used in lung cancer cell line A549 after treatment with this compound in comparison with cis-diamminedichloroplatinum(II) (cis-DDP). Apoptotic cells at early and late stages and also necrotic ones were observed after usage of cis-Pt(II) complex of 3-aminoflavone and the percentage of these cells outnumbered the values obtained after cis-DDP application. The former compound induced a higher percentage of P53 and BAX expression in A549 cells in comparison with the latter one. Results indicate the beneficial properties of cis-Pt(II) complex of 3-aminoflavone as a potential antitumor drug.
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Affiliation(s)
- Beata Kosmider
- Department of Cytogenetics and Plant Molecular Biology, University of Lodz, ul. Banacha 12/16, 90-237 Lodz, Poland.
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Chen XX, Lai MD, Zhang YL, Huang Q. Less cytotoxicity to combination therapy of 5-fluorouracil and cisplatin than 5-fluorouracil alone in human colon cancer cell lines. World J Gastroenterol 2002; 8:841-6. [PMID: 12378627 PMCID: PMC4656572 DOI: 10.3748/wjg.v8.i5.841] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: Our previous studies showed increased sensitivity to 5-FU in colon cancer cell lines with microsatellite instability, and considered that mutations of TGFβ-R II, IGF IIR, RIZ gene might enhance the potentials of cell growth and proliferation, which increased the sensitivity to 5-FU. Here we compared the distribution of cell cycle and P53 status between two human colon cancer cell lines with different sensitivity to 5-FU. Because mechanistic differences exist between 5-FU and CDDP, we also analyzed the efficacy of CDDP and combination therapy on two human colon cancer cell lines.
METHODS: We compared the sensitivity to CDDP of these two cell lines by MTT assay. Distribution of cell cycle under treatment of 5-FU, CDDP alone or both was analyzed by Flow Cytometry, and expression of P53 was detected by immunocytochemical staining.
RESULTS: SW480 cells were more sensitive to CDDP than LoVo cells at the concentrations above 16 μmol/L (Ratio of absorption is 0.64 and 0.79 at 16 μmol/L, respectively; P < 0.01). Efficacy of combination therapy was conversely lower than that of single-therapy of 5-FU (Ratio of absorption in LoVo + 5-FU, SW480 + 5-FU, LoVo + 5-FU + CDDP and SW480 + 5-FU + CDDP is 0.53, 0.54, 0.72, 0.78, respectively; P < 0.01). LoVo cells were negative whereas SW480 cells positive in P53 expression. 5-FU induced G1-phase arrest in both cell lines, but LoVo cells peaked 24 h earlier than SW480 cells, and 48 h earlier for an apparent hypodiploid DNA. However, CDDP showed the contrary, inducing S-phase arrest, and SW480 cells peaking 36 h earlier. Both cell lines showed hypodipliod nuclei 48 h after CDDP treatment. Percentage of cells in G1-phase and S-phase dominated alternatively under combination therapy in both cell lines.
CONCLUSION: These results suggest that colon cancer cells with microsatellite instability are more sensitive to 5-FU, whereas more resistant to CDDP. Combination therapy of 5-FU and CDDP shows fewer efficacies than 5-FU single-therapy, although it can render a cell cycle arrest. P53 may be involved in the shift of G1-phase to S-phase, but inessentially.
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Affiliation(s)
- Xiu-Xu Chen
- Department of Pathology, School of Medicine, Zhe Jiang University, Hang Zhou, 310031, Zhejiang Province, China
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McDonald ES, Windebank AJ. Cisplatin-induced apoptosis of DRG neurons involves bax redistribution and cytochrome c release but not fas receptor signaling. Neurobiol Dis 2002; 9:220-33. [PMID: 11895373 DOI: 10.1006/nbdi.2001.0468] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cisplatin causes apoptosis of DRG neurons in vitro and in vivo that can be prevented by high dose NGF. Design of a neuronal rescue strategy for patients receiving cisplatin will be facilitated by knowledge of the mechanism by which cisplatin causes DRG death. Inhibition of the fas receptor/ligand interaction prevents apoptosis in certain cancer cell lines treated with DNA damaging agents, including cisplatin. We demonstrated that killing curves from mice lacking a functional fas receptor and wild-type controls were not different over a wide range of therapeutically relevant concentrations. However, cisplatin treatment of DRG caused redistribution of cytosolic bax and mitochondrial release of cytochrome c. Bax redistribution was prevented by high dose NGF. This demonstrates for the first time that cisplatin does not signal for death via the fas pathway, but it does initiate the mitochondrial stress pathway in neurons and that NGF blocks death upstream of bax redistribution.
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Affiliation(s)
- Elizabeth S McDonald
- Molecular Neuroscience Program, Mayo Graduate School, Rochester, Minnesota 55905, USA
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