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cisplatin resistance

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https://www.readbyqxmd.com/read/28086831/evaluation-of-the-cytotoxicity-of-the-bithionol-cisplatin-combination-in-a-panel-of-human-ovarian-cancer-cell-lines
#1
Vijayalakshmi N Ayyagari, Tsung-Han Jeff Hsieh, Paula L Diaz-Sylvester, Laurent Brard
BACKGROUND: Combination drug therapy appears a promising approach to overcome drug resistance and reduce drug-related toxicities in ovarian cancer treatments. In this in vitro study, we evaluated the antitumor efficacy of cisplatin in combination with Bithionol (BT) against a panel of ovarian cancer cell lines with special focus on cisplatin-sensitive and cisplatin-resistant cell lines. The primary objectives of this study are to determine the nature of the interactions between BT and cisplatin and to understand the mechanism(s) of action of BT-cisplatin combination...
January 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28081228/resistance-for-genotoxic-damage-in-mesenchymal-stromal-cells-is-increased-by-hypoxia-but-not-generally-dependent-on-p53-regulated-cell-cycle-arrest
#2
Jana Lützkendorf, Elisabeth Wieduwild, Katrin Nerger, Nina Lambrecht, Hans-Joachim Schmoll, Carsten Müller-Tidow, Lutz Peter Müller
Adult stem cells including multipotent mesenchymal stromal cells (MSC) acquire a high amount of DNA-damage due to their prolonged lifespan. MSC may exert specific mechanisms of resistance to avoid loss of functional activity. We have previously shown that resistance of MSC is associated with an induction of p53 and proliferation arrest upon genotoxic damage. Hypoxia may also contribute to resistance in MSC due to the low oxygen tension in the niche. In this study we characterized the role of p53 and contribution of hypoxia in resistance of MSC to genotoxic damage...
2017: PloS One
https://www.readbyqxmd.com/read/28079882/stability-of-the-cancer-target-ddias-is-regulated-by-the-chip-hsp70-pathway-in-lung-cancer-cells
#3
Kyoung-Jae Won, Joo-Young Im, Bo-Kyung Kim, Hyun Seung Ban, Young-Jin Jung, Kyeong Eun Jung, Misun Won
DNA damage-induced apoptosis suppressor (DDIAS) rescues lung cancer cells from apoptosis in response to DNA damage. DDIAS is transcriptionally activated by NFATc1 and EGF-mediated ERK5/MEF2B, leading to cisplatin resistance and cell invasion. Therefore, DDIAS is suggested as a therapeutic target for lung cancer. Here, we report that DDIAS stability is regulated by E3 U-box ubiquitin ligase carboxyl terminus of HSP70-interacting protein (CHIP)-mediated proteasomal degradation. We first isolated CHIP as an interacting partner of DDIAS by yeast two-hybrid screening...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28079002/neurotoxicity-associated-with-platinum-based-anti-cancer-agents-what-are-the-implications-of-copper-transporters
#4
Vanesa Stojanovska, Rachel McQuade, Emma Rybalka, Kulmira Nurgali
Platinum-based anti-cancer agents, which include cisplatin, carboplatin and oxaliplatin, are an important class of drugs used in clinical setting to treat a variety of cancers. The cytotoxic efficacy of these drugs is mediated by the formation of interstrand and intrastrand crosslinks, or platinum adducts on nuclear DNA. There is also evidence demonstrating that mitochondrial DNA is susceptible to platinum-adduct damage in dorsal root ganglia neurons. Although all platinum-based agents form similar DNA adducts, they are quite different in terms of activation, systemic toxicity and tolerance...
January 11, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28076844/sulforaphane-inhibits-cancer-stem-like-cell-properties-and-cisplatin-resistance-through-mir-214-mediated-downregulation-of-c-myc-in-non-small-cell-lung-cancer
#5
Qian-Qian Li, You-Ke Xie, Yue Wu, Lin-Lin Li, Ying Liu, Xiao-Bo Miao, Qiu-Zhen Liu, Kai-Tai Yao, Guang-Hui Xiao
We herein report that sulforaphane (SFN), a potent anti-cancer and well-tolerated dietary compound, inhibits cancer stem-like cell (CSC) properties and enhances therapeutic efficacy of cisplatin in human non-small cell lung cancer (NSCLC). SFN exerted these functions through upregulation of miR-214, which in turn targets the coding region of c-MYC. This finding was further corroborated by our observations that plasmid or lentiviral vector-mediated expression of 3'UTR-less c-MYC cDNA and cisplatin- or doxorubicin-induced endogenous c-MYC accumulation was similarly suppressed by either SFN or miR-214...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28075474/isomahanine-induces-endoplasmic-reticulum-stress-and-simultaneously-triggers-p38%C3%A2-mapk-mediated-apoptosis-and-autophagy-in-multidrug-resistant-human-oral-squamous-cell-carcinoma-cells
#6
Tanyarath Utaipan, Anan Athipornchai, Apichart Suksamrarn, Surasak Chunsrivirot, Warangkana Chunglok
Advanced oral squamous cell carcinoma (OSCC) is typically aggressive and closely correlated with disease recurrence and poor survival. Multidrug resistance (MDR) is the most critical problem leading to therapeutic failure. Investigation of novel anticancer candidates targeting multidrug-resistant OSCC cells may provide a basis for developing effective strategies for OSCC treatment. In the present study, we investigated the cytotoxic mechanism of a carbazole alkaloid, namely isomahanine, in a multidrug‑resistant OSCC cell line CLS-354/DX...
January 4, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28075014/knockdown-of-rev3-synergizes-with-atr-inhibition-to-promote-apoptosis-induced-by-cisplatin-in-lung-cancer-cells
#7
He-Guo Jiang, Ping Chen, Jin-Yu Su, Ming Wu, Hai Qian, Yi Wang, Jian Li
It has been demonstrated that REV3, the catalytic subunit of the translesion synthesis (TLS) polymerase ζ, play an important role in DNA damage response (DDR) induced by cisplatin, and Ataxia telangietasia mutated and Rad-3-related (ATR) knase is a central player in activating cell cycle checkpoint, stabilizing replication forks, regulating DDR, and promoting repair of DNA damage caused by cisplatin. Cancer cells deficient in either one of REV3 and ATR are more sensitive to cisplatin. However, whether co-inhibition of REV3 and ATR can further increase sensitivity of non-small cell lung cancer (NSCLC) cells to cisplatin is not clear...
January 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28074905/mir-488-inhibits-proliferation-and-cisplatin-sensibility-in-non-small-cell-lung-cancer-nsclc-cells-by-activating-the-eif3a-mediated-ner-signaling-pathway
#8
Chao Fang, Yi-Xin Chen, Na-Yiyuan Wu, Ji-Ye Yin, Xiang-Ping Li, Hsuan-Shun Huang, Wei Zhang, Hong-Hao Zhou, Zhao-Qian Liu
Our previous studied indicated that eukaryotic translation initiation factor 3a (eIF3a) increases the sensitive of platinum-based chemotherapy in lung cancer. MiRNAs play an important role in lung carcinogenesis and drug response. In this study, we aimed to identify potential endogenous miRNAs that inhibit eIF3a expression and determine their influence of this inhibition on cisplatin resistance. Using bioinformatics analysis prediction and confirmation with dual-luciferase reporter assays, we found that miRNA-488 inhibited eIF3a expression by directly binding to the 3'UTR of eIF3a...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074003/dna-polymerase-beta-germline-variant-confers-cellular-response-to-cisplatin-therapy
#9
Antonia A Nemec, Laura Abriola, Jane S Merkel, Elisa deStanchina, Michelle DeVeaux, Daniel Zelterman, Peter M Glazer, Joann B Sweasy
: Resistance to cancer chemotherapies leads to deadly consequences, yet current research focuses only on the roles of somatically acquired mutations in this resistance. The mutational status of the germline is also likely to play a role in the way cells respond to chemotherapy. The carrier status for the POLB rs3136797 germline mutation encoding P242R DNA polymerase beta (Pol β) is associated with poor prognosis for lung cancer, specifically in response to treatment with cisplatin. Here, it is revealed that the P242R mutation is sufficient to promote resistance to cisplatin in human cells and in mouse xenografts...
January 10, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28073588/overexpression-of-cytochrome-p450-2a6-in-adrenocortical-carcinoma
#10
Timothy D Murtha, Taylor C Brown, Jill C Rubinstein, Felix Haglund, C Christofer Juhlin, Catharina Larsson, Reju Korah, Tobias Carling
BACKGROUND: Cytochrome P450-mediated metabolism of chemotherapeutic agents contributes to chemotherapy resistance in multiple malignancies. Adrenocortical carcinoma is known to have a poor response to adjuvant therapies; however, the mechanism remains unknown. Recent comprehensive genetic analyses of adrenocortical carcinomas demonstrated recurrent copy number gains in multiple cytochrome P450 genes prompting investigation into whether cytochrome P450 overexpression potentiates adrenocortical carcinoma chemoresistance...
January 7, 2017: Surgery
https://www.readbyqxmd.com/read/28070043/-effects-of-methylseleninic-acid-on-cisplatin-resistant-ovarian-cancer-cells-skov3-ddp-and-the-mechanisms
#11
Ying Tan, Qing Feng, Xin Sun, Min Xue, Ning Jiang, Xinliang Deng
To investigate the reversal effect of methylseleninic acid on cisplatin (DDP)-resistant ovarian cancer cells and the underlying mechanisms.
 Methods: SKOV3/DDP cells were incubated with cisplatin at different concentrations for 48 h, then the proliferation rate of SKOV3/DDP cells was detected by MTT assays, and the expression of β-catenin in SKOV3/DDP cells was examined by Western blot. The inhibitory effect of methyl-seleninic acid (MSA) combined with DDP at different concentrations on SKOV3/DDP cells was assayed by MTT method...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28066612/elevated-hotair-expression-associated-with-cisplatin-resistance-in-non-small-cell-lung-cancer-patients
#12
Ming-Yue Liu, Xi-Qing Li, Tian-Hui Gao, Yao Cui, Ning Ma, Yun Zhou, Guo-Jun Zhang
BACKGROUND: This study investigated the mechanism of drug resistance in non-small cell lung cancer (NSCLC) patients. We specifically studied whether long noncoding RNAs influence drug resistance in NSCLC to discover new therapeutic targets to increase the survival rate of drug-resistant NSCLC patients. METHODS: Tissue samples were collected from NSCLC patients, and total RNA was isolated for assessment of HOTAIR expression and drug resistance status. MTT assays, tumor sphere formation assays, and western blot were performed to cytologically determine the relationship between HOTAIR expression and cisplatin resistance, as well as to elucidate the potential molecular mechanism involved...
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28065856/hypoxia-promotes-mitochondrial-glutamine-metabolism-through-hif1%C3%AE-gdh-pathway-in-human-lung-cancer-cells
#13
Zi-Feng Jiang, Min Wang, Jian-Lin Xu, Ya-Jing Ning
Drug-resistance is common in human lung cancer therapy. Hypoxia remarkably contributes to drug-resistance in lung cancer but the underlying mechanism remains elusive. Here we demonstrate that hypoxia-induced glutamine metabolism is involved in drug resistance in lung cancer cells. Hypoxia increases glutamine up-take, glutamate to α-ketoglutarate flux and the generation of ATP in lung cancer cells by up-regulating the expression of glutamate dehydrogenase (GDH). Hypoxia-induced expression of GDH relies on the up-regulation of HIF1α but not HIF2α...
January 5, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28065566/structure-activity-relationships-of-diverse-xanthones-against-multidrug-resistant-human-tumor-cells
#14
Qiwen Wang, Chenyao Ma, Yun Ma, Xiang Li, Yong Chen, Jianwei Chen
Thirteen xanthones were isolated naturally from the stem of Securidaca inappendiculata Hassk, and structure-activity relationships (SARs) of these compounds were comparatively predicted for their cytotoxic activity against three human multidrug resistant (MDR) cell lines MCF-7/ADR, SMMC-7721/Taxol, and A549/Taxol cells. The results showed that the selected xanthones exhibited different potent cytotoxic activity against the growth of different human tumor cell lines, and most of the xanthones exhibited selective cytotoxicity against SMMC-7721/Taxol cells...
December 20, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28064545/androgen-receptor-activation-a-prospective-therapeutic-target-for-bladder-cancer
#15
Taichi Mizushima, Kathleen A Tirador, Hiroshi Miyamoto
Patients with non-muscle-invasive or muscle-invasive bladder cancer undergoing surgery and currently available conventional therapy remain having a high risk of tumor recurrence or progression, respectively. Novel targeted molecular therapy is therefore expected to improve patient outcomes. Meanwhile, substantially higher incidence of bladder cancer in men has prompted research on androgen-mediated androgen receptor (AR) signaling in this malignancy. Indeed, preclinical evidence has suggested that AR signaling plays an important role in urothelial carcinogenesis and tumor outgrowth as well as resistance to some of the currently available conventional non-surgical therapies...
January 9, 2017: Expert Opinion on Therapeutic Targets
https://www.readbyqxmd.com/read/28057599/aspirin-plus-sorafenib-potentiates-cisplatin-cytotoxicity-in-resistant-head-and-neck-cancer-cells-through-xct-inhibition
#16
Jong-Lyel Roh, Eun Hye Kim, Hyejin Jang, Daiha Shin
The nonsteroidal anti-inflammatory drug aspirin and the multikinase inhibitor sorafenib have both shown experimental and clinical anticancer activities. The present study investigated whether aspirin and sorafenib synergize to potentiate cisplatin treatment in resistant head and neck cancer (HNC) cells. The effects of aspirin, sorafenib and cisplatin, and combinations thereof were assessed by measuring cell viability, death, glutathione (GSH) and reactive oxygen species (ROS) levels, protein and mRNA expression, genetic inhibition and overexpression of cystine-glutamate antiporter (xCT) and tumor xenograft mouse models...
January 3, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28057471/partial-least-squares-regression-and-fourier-transform-infrared-ftir-microspectroscopy-for-prediction-of-resistance-in-hepatocellular-carcinoma-hepg2-cells
#17
Cholpajsorn Junhom, Natthida Weerapreeyakul, Waraporn Tanthanuch, Kanjana Thumanu
We evaluated the feasibility of FTIR microspectroscopy combined with partial least squares regression (PLS-R) for determination of resistance in HepG2 cells. Cell viability testing was performed using neutral red assay for the concentration of cisplatin resulting in 50% antiproliferation (IC50). The resistance index (RI) is the ratio of the IC50 in resistant HepG2 cells vs. parental HepG2 cells. Principal component and unsupervised hierarchical cluster analyses were applied and a differentiation of samples of cells (parental, 1...
January 3, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28056551/hepatitis-b-x-interacting-protein-promotes-cisplatin-resistance-and-regulates-cd147-via-sp1-in-ovarian-cancer
#18
Wei Zou, Xiangdong Ma, Hong Yang, Wei Hua, Biliang Chen, Guoqing Cai
Ovarian cancer is the highest mortality rate of all female reproductive malignancies. Drug resistance is a major cause of treatment failure in malignant tumors. Hepatitis B X-interacting protein acts as an oncoprotein, regulates cell proliferation, and migration in breast cancer. We aimed to investigate the effects and mechanisms of hepatitis B X-interacting protein on resistance to cisplatin in human ovarian cancer cell lines. The mRNA and protein levels of hepatitis B X-interacting protein were detected using RT-PCR and Western blotting in cisplatin-resistant and cisplatin-sensitive tissues, cisplatin-resistant cell lines A2780/CP and SKOV3/CP, and cisplatin-sensitive cell lines A2780 and SKOV3...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28056464/impact-of-ctla-4-blockade-in-conjunction-with-metronomic-chemotherapy-on-preclinical-breast-cancer-growth
#19
Karla Parra, Paloma Valenzuela, Natzidielly Lerma, Alejandra Gallegos, Luis C Reza, Georgialina Rodriguez, Urban Emmenegger, Teresa Di Desidero, Guido Bocci, Mitchell S Felder, Marian Manciu, Robert A Kirken, Giulio Francia
BACKGROUND: Although there are reports that metronomic cyclophosphamide (CTX) can be immune stimulating, the impact of its combination with anti-CTLA-4 immunotherapy for the treatment of cancer remains to be evaluated. METHODS: Murine EMT-6/P breast cancer, or its cisplatin or CTX-resistant variants, or CT-26 colon, were implanted into Balb/c mice. Established tumours were monitored for relative growth following treatment with anti-CTLA-4 antibody alone or in combination with; (a) metronomic CTX (ldCTX; 20 mg kg(-1) day(-1)), b) bolus (150 mg kg(-1)) plus ldCTX, or (c) sequential treatment with gemcitabine (160 mg kg(-1) every 3 days)...
January 5, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28053541/nasopharyngeal-carcinoma-treated-with-bevacizumab-combined-with-paclitaxel-liposome-plus-cisplatin-a-case-report-and-literature-review
#20
Wan He, Chang Zou, Zhongkai Tian, Wenyong Tan, Weixi Shen, Jinghua Chen, Liping Liu, Ruilian Xu
Patients with stage IV nasopharyngeal carcinoma (NPC) have a poor prognosis, even with effective chemotherapy. Target agents combined with chemotherapy may improve NPC patients' outcome. The case of a patient with NPC, who was treated by adding bevacizumab to chemotherapy after disease progression using first-line chemotherapy, is reported. Recently published literature about effects of combining bevacizumab with standard chemotherapy in NPC cell lines or patients are also reviewed and discussed. Consistent with a few preclinical trials and Phase II clinical trials, bevacizumab may reverse the drug resistance to chemotherapy, and its toxic side effects are well tolerated...
2017: OncoTargets and Therapy
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