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tumor chemosensitivity assay

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https://www.readbyqxmd.com/read/30106439/zinc-enhances-chemosensitivity-to-paclitaxel-in-pc%C3%A2-3-prostate-cancer-cells
#1
Ping Zhang, Yang Li, Xinyu Tang, Rui Guo, Jiuling Li, Ying Ying Chen, Hua Guo, Jing Su, Liankun Sun, Yanan Liu
Paclitaxel‑based chemotherapy is a promising approach for prostate cancer treatment. However, single‑drug chemotherapy is associated with an increased risk of drug resistance. Therefore, novel combination chemotherapy regimens are a popular topic of research. Zinc participates in the regulation of apoptosis, for example in the form of Zn2+ and via zinc‑dependent enzymes. Zinc can either induce or suppress apoptosis, and its effect depends primarily on its concentration. Previous research has demonstrated that physiological concentrations of zinc can directly induce apoptosis of PC‑3 prostate cancer cells via the mitochondrial pathway...
August 2, 2018: Oncology Reports
https://www.readbyqxmd.com/read/30099447/emodin-and-its-combination-with-cytarabine-induce-apoptosis-in-resistant-acute-myeloid-leukemia-cells-in-vitro-and-in-vivo
#2
Yingyu Chen, Donghui Gan, Qinghua Huang, Xiaofeng Luo, Donghong Lin, Jianda Hu
BACKGROUND/AIMS: Acute myeloid leukemia (AML) remains a hematologic malignancy with poor survival and a high risk of relapse, which is mainly caused by the emergence of multidrug resistance (MDR). The identification of novel agents to improve therapeutic strategies becomes important priority for AML treatment. It has been shown that emodin has therapeutic effects on many kinds of human malignant tumors. In this study, we investigated the anti-leukemia effects of emodin alone or in combination with cytarabine (Ara-C) on multidrug-resistant AML HL-60/ADR cells and in a mouse xenograft model of human highly tumorigenic AML HL-60/H3 cells...
August 10, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/30083262/targeting-s1pr1-stat3-loop-abrogates-desmoplasia-and-chemosensitizes-pancreatic-cancer-to-gemcitabine
#3
Manendra Babu Lankadasari, Jayasekharan S Aparna, Sabira Mohammed, Shirley James, Kazunori Aoki, Valsalakumari S Binu, Sindhu Nair, Kuzhuvelil B Harikumar
Rationale: Pancreatic cancer is associated with poor prognosis with a 5-year survival rate of less than 6%. Approximately 90% of pancreatic cancer patients harbor somatic mutations in the KRAS gene. Multiple lines of evidence suggest a persistent activation of STAT3 in KRAS-driven oncogenesis contributing to desmoplasia and gemcitabine resistance. Sphingosine 1-phosphate receptor 1 (S1PR1) is an integral component of tumor progression and maintains an activated state of STAT3. FTY720 is an approved drug for multiple sclerosis and acts as a functional antagonist for S1PR1...
2018: Theranostics
https://www.readbyqxmd.com/read/30077625/hyaluronan-cd44-interaction-promotes-hpv-16-e6-oncogene-mediated-oropharyngeal-cell-carcinoma-survival-and-chemoresistance
#4
Lilly Y W Bourguignon, Christine Earle, Marisa Shiina
Head and neck squamous cell carcinoma (HNSCC) is a malignancy that often involves the oral cavity, pharynx, larynx, or paranasal sinuses. There is a compelling evidence of the human papilloma virus including HPV16 E6 oncogene drives cell transformation and oncogenic processes of HPV positive (HVP+) HNSCC [in particular, Oropharyngeal Squamous Cell Carcinoma (OPSCC)]. In this study, we determined that human OPSCC-derived, HPV16 E6+ cells (UMSCC-104 and UMSCC-47 cell lines) express CD44 and a regulatory transcription factor, c-Jun...
August 2, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/30041677/mir-22-kat6b-axis-is-a-chemotherapeutic-determiner-via-regulation-of-pi3k-akt-nf-kb-pathway-in-tongue-squamous-cell-carcinoma
#5
Yixue Gu, Hao Liu, Fangren Kong, Jiahui Ye, Xiaoting Jia, Zhijie Zhang, Nan Li, Jiang Yin, Guopei Zheng, Zhimin He
BACKGROUND: Tongue squamous cell carcinoma (TSCC) is the most common oral cancer. Neoadjuvant systemic treatment before or after surgery for advanced TSCC is considered one of the most crucial factors in reducing mortality. However, the therapeutic benefits of chemotherapy are usually attenuated due to intrinsic and/or acquired drug resistance, and a large proportion of TSCC are resistant to chemotherapy, which may result in more aggressive tumor behavior and an even worse clinical outcome...
July 24, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/30039695/intracellular-no-releasing-hyaluronic-acid-based-nanocarriers-a-potential-chemosensitizing-agent-for-cancer-chemotherapy
#6
Da Eun Kim, Chan Woo Kim, Hong Jae Lee, Kyung Hyun Min, Kyu Hwan Kwack, Hyeon-Woo Lee, Jaebeum Bang, Kiyuk Chang, Sang Cheon Lee
In this work, we investigate whether S-nitrosoglutathione (GSNO)-conjugated hyaluronic acid-based self-assembled nanoparticles (GSNO-HANPs) can be useful as a chemosensitizing agent to improve the anticancer activity of doxorubicin (DOX). The GSNO-HANPs were prepared by aqueous assembly of GSNO-conjugated HA with grafted poly(lactide- co-glycolide). Aqueous GSNO stability shielded within the assembled environments of the GSNO-HANPs was greatly enhanced, compared to that of free GSNO. The NO release from the GSNO-HANPs was facilitated in the presence of hyaluronidase-1 (Hyal-1) and ascorbic acid at intracellular concentrations...
August 2, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30034549/hdac3-mediated-silencing-of-mir-451-decreases-chemosensitivity-of-patients-with-metastatic-castration-resistant-prostate-cancer-by-targeting-nedd9
#7
Dong-Qin Chen, Chen Yu, Xue-Feng Zhang, Zhong-Fang Liu, Rui Wang, Min Jiang, Hao Chen, Feng Yan, Min Tao, Long-Bang Chen, Hong Zhu, Ji-Feng Feng
Background: Treatment of metastatic castration-resistant prostate cancer (mCRPC) with docetaxel often fails due to the emergence of chemoresistance. Thus, restoring chemosensitivity to docetaxel-based therapies remains a challenge in mCRPC treatment. Methods: microRNA (miR)-451 expression was measured in docetaxel-treated prostate cancer cells and tumor tissues by quantitative reverse-transcription polymerase chain reaction . Cell-counting kit 8 assay was performed to determine docetaxel chemoresistance...
2018: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/30033768/development-and-characterization-of-a-novel-cationic-pegylated-niosome-encapsulated-forms-of-doxorubicin-quercetin-and-sirna-for-the-treatment-of-cancer-by-using-combination-therapy
#8
Mahdie Hemati, Fateme Haghiralsadat, Fatemeh Yazdian, Farzaneh Jafari, Ali Moradi, Zahra Malekpour-Dehkordi
The aim of this study was to optimize the cationic PEGylated niosome-containing anti-cancer drugs and siRNA to enhance the therapeutic response. Therefore, various surfactant-based (tween-60) vesicles of doxorubicin (DOX; a chemotherapeutic drug) and quercetin (QC; a chemosensitizer) were prepared. To load siRNA on niosomes, 1, 2-dioleoyl-3-trimethylammonium-propane (DOTAP) was used as a cationic lipid. The optimum formulation containing tween-60:cholesterol:DPPC:DOTAP:DSPE-PEG2000 at 49.5:5.5:15:25:5 demonstrated that the vesicle size and zeta potential were 52...
July 22, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/30008835/microrna-29c-restores-cisplatin-sensitivity-in-liver-cancer-through-direct-inhibition-of-sirtuin-1-expression
#9
Wei Zhang, Peng Luo
Liver cancer is one of the most prevalent human tumors in the world. Despite recent advances regarding the understanding of the molecular basis of liver cancer and the introduction of novel chemotherapeutic approaches, liver cancer remains associated with a poor prognosis. Sirtuin 1 (SIRT1) was identified to be abnormally upregulated in liver cancer. Dysregulation of microRNAs (miRs/miRNAs) is associated with a variety of types of cancer, and miRNAs may also serve a role in tumorigenesis and progression. The present study demonstrated that following the selection of the cisplatin chemoresistant HepG2 cell line, miR-29c is downregulated using reverse transcription-quantitative polymerase chain reaction...
August 2018: Oncology Letters
https://www.readbyqxmd.com/read/30008617/b7-h4-overexpression-contributes-to-poor-prognosis-and-drug-resistance-in-triple-negative-breast-cancer
#10
Ling Wang, Chao Yang, Xin-Bo Liu, Li Wang, Fu-Biao Kang
Background: The expression of the immunoregulatory protein B7-H4 has been reported in many types of cancer, including breast cancer. However, its role in triple-negative breast cancer (TNBC), especially its correlation with patients' prognosis and chemoresistance remains unclear. Methods: The expression of B7-H4 in TNBC tissues and cell lines were measured with Real-Time PCR and western blotting. 65 cases of TNBC tissue samples and adjacent non-tumor tissue samples were analyzed by immunochemistry to demonstrate the correlation between the B7-H4 expression and clinicopathological characteristics...
2018: Cancer Cell International
https://www.readbyqxmd.com/read/30004169/upregulation-of-mir-874-3p-and-mir-874-5p-inhibits-epithelial-ovarian-cancer-malignancy-via-sik2
#11
Bairong Xia, Mei Lin, Wei Dong, Hong Chen, Bing Li, Xiaye Zhang, Yan Hou, Ge Lou
Based on miR-874 expression levels in the GSE47841 microarray, we hypothesized that the mature products of miR-874, miR-874-3p, or miR-874-5p, would inhibit epithelial ovarian cancer (EOC) cell proliferation, metastasis, and chemoresistance. We first examined miR-874-3p and miR-874-5p expression levels in primary EOC tumor tissue samples and found that they were significantly decreased. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) cell proliferation and transwell assays revealed that miR-874-3p and miR-874-5p significantly inhibit EOC cell proliferation, migration, and invasion...
July 13, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/30001527/linc00518-contributes-to-multidrug-resistance-through-regulating-the-mir-199a-mrp1-axis-in-breast-cancer
#12
Liang Chang, Zhuang Hu, Zhenyu Zhou, Hui Zhang
BACKGROUND/AIMS: Long non-coding RNAs (LncRNAs) have been validated to be pivotal mediators in multidrug resistance (MDR) of various cancers. This study aims to explore the roles and molecular mechanisms of linc00518 implicated in chemoresistance in breast cancer. METHODS: Expressions of linc00518, miR-199a and MRP1 were evaluated by RT-qPCR or western blot. IC50 values of adriamycin (ADR), vincristine (VCR) and paclitaxel (PTX) were determined by XTT assays and cell apoptosis was assessed by flow cytometry...
July 12, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29993250/small-molecule-inhibition-of-microrna-mir-21-rescues-chemosensitivity-of-renal-cell-carcinoma-to-topotecan
#13
Yuta Naro, Nicholas Ankenbruck, Meryl Thomas, Yaniv Tivon, Colleen M Connelly, Laura Gardner, Alexander Deiters
Chemical probes of microRNA (miRNA) function are potential tools for understanding miRNA biology that also provide new approaches for discovering therapeutics for miRNA-associated diseases. MicroRNA-21 (miR-21) is an oncogenic miRNA that is overexpressed in most cancers and has been strongly associated with driving chemoresistance in cancers such as renal cell carcinoma (RCC). Using a cell-based luciferase reporter assay to screen small molecules, we identified a novel inhibitor of miR-21 function. Following structure-activity relationship studies, an optimized lead compound demonstrated cytotoxicity in several cancer cell lines...
July 11, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29986635/silencing-of-eno1-by-shrna-inhibits-the-proliferation-of-gastric-cancer-cells
#14
Hui Qiao, Yu-Feng Wang, Wen-Zhen Yuan, Bing-Dong Zhu, Lei Jiang, Quan-Lin Guan
α-Enolase is a significant subunit of enolase and acts as a glycolytic enzyme responsible for catalyzing the conversion of 2-phosphoglycerate to phosphoenolpyruvate in the anaerobic glycolysis pathway. The research about their role is known little in tumor invasion and metastasis. This research analyzed the effect of α-enolase in proliferation and progression of human gastric cancer. The constructed PLKO.1-ENO1 shRNA vector was transfected into 293 T cells and used to infect gastric cancer cells, MKN45, by using lentivirus method...
January 1, 2018: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29980193/lim-and-sh3-protein-1-regulates-cell-growth-and-chemosensitivity-of-human-glioblastoma-via-the-pi3k-akt-pathway
#15
Chuanhong Zhong, Yitian Chen, Bei Tao, Lilei Peng, Tangming Peng, Xiaobo Yang, Xiangguo Xia, Ligang Chen
BACKGROUND: LIM and SH3 protein 1 (LASP1) is upregulated in several types of human cancer and implicated in cancer progression. However, the expression and intrinsic function of LASP1 in glioblastoma (GBM) remains unclear. METHOD: Oncomine and The Cancer Genome Atlas (TCGA) database was analyzed for the expression and clinical significance of LASP1 in GBM. LASP1 mRNA and protein level were measured by qRT-PCR and western blotting. The effect of LASP1 on GBM proliferation was examined by MTT assay and colony formation assay, the effect of LASP1 on sensitivity of Temozolomide was measured by flow cytometry and subcutaneous tumor model...
July 6, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29973205/inhibition-of-crm1-activity-sensitizes-endometrial-and-ovarian-cell-lines-to-trail-induced-cell-death
#16
François Fabi, Pascal Adam, Keven Vincent, Françis Demontigny, Sophie Parent, France-Hélène Joncas, Eric Asselin
BACKGROUND: CRM1 enrichment has been shown to be indicative of invasive as well as chemoresistant tumors. On the other hand, TRAIL, a powerful and specific anti-tumoral agent, has yet to be used effectively to treat gynecological tumors in patients. In the present study, we examined if CRM1, a nuclear exporter capable of mediating protein transport, could be a relevant target to restore chemosensitivity in chemoresistant cells. We thus explored the hypothesis that CRM1-driven nuclear exclusion of tumor suppressors could lead to chemoresistance and that CRM1 inhibitors could present a novel therapeutic approach, allowing sensitization to chemotherapeutic agents...
July 4, 2018: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/29953965/microrna-17-inhibition-overcomes-chemoresistance-and-suppresses-epithelial-mesenchymal-transition-through-a-dedd-dependent-mechanism-in-gastric-cancer
#17
Dong-Mei Wu, Xiao-Wu Hong, Ling-Ling Wang, Xia-Feng Cui, Jun Lu, Gui-Quan Chen, Yuan-Lin Zheng
MicroRNAs (miRNAs), a novel class of important gene-regulatory molecules, correlates with tumor growth, invasion, metastasis, and chemo resistance in gastric cancer (GC). Microarray analysis revealed that aberrant expressed microRNA-17 (miR-17) and DEDD were identified in GC. DEDD has been found to act as an endogenous suppressor of tumor growth and metastasis through epithelial-mesenchymal transition (EMT) process. However, the role of miRNA-17 (miR-17) has not been clearly evaluated in GC, thereby a series of in vitro experiments were performed in this study...
June 25, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29940566/sensitization-of-gastric-cancer-cells-to-5-fu-by-microrna-204-through-targeting-the-tgfbr2-mediated-epithelial-to-mesenchymal-transition
#18
Liang-Qing Li, Dun Pan, Qun Chen, Sheng-Wei Zhang, Di-Ya Xie, Xue-Lan Zheng, Hui Chen
BACKGROUND/AIMS: Gastric cancer (GC) is the most common gastrointestinal malignancy, causing cancer-related deaths in East Asia. MicroRNAs (miRNAs) are small non-coding RNAs aberrantly expressed in human tumors. In this study, we aim to investigate the roles of miR-204 in the epithelial to mesenchymal transition (EMT)-associated chemosensitivity. METHODS: The expression of miR-204 was detected in clinical tumor samples and GC cell lines by real time PCR. Tumor cell's growth, invasion, and migration were measured by MTT assay, wound healing assay, and transwell invasion assay, respectively...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29928364/53bp1-inhibits-the-migration-and-regulates-the-chemotherapy-resistance-of-ovarian-cancer-cells
#19
Shuhui Hong, Xiaoyan Li, Ying Zhao, Qifeng Yang, Beihua Kong
The major problems faced during the treatment of ovarian cancer are metastasis and the development of intrinsic or acquired drug resistance. The present study assessed whether tumor protein p53 binding protein 1 (53BP1) regulated migration and modulated chemotherapy resistance in SKOV3 cells and identified proteins associated with the molecular mechanisms underlying this coordinate regulation. SKOV3 cells were transfected using a 53BP1-expressing vector, which induced 53BP1 overexpression. The migration of the transfected cells was observed using a Transwell assay...
June 2018: Oncology Letters
https://www.readbyqxmd.com/read/29928353/identification-of-proteins-associated-with-paclitaxel-resistance-of-epithelial-ovarian-cancer-using-itraq-based-proteomics
#20
Yuanjing Wang, Hongxia Li
Chemotherapy is an important adjuvant therapy for epithelial ovarian cancer (EOC). The main cause of chemotherapy failure in EOC is paclitaxel resistance. The present study aimed to identify novel biomarkers to predict chemosensitivity to paclitaxel and improve our understanding of the molecular mechanisms underlying paclitaxel resistance in EOC. In the present study, the heterogeneity of EOC was evaluated by adenosine triphosphate-tumor chemosensitivity assay (ATP-TCA) in vitro . Fresh samples were collected from 54 EOC cases during cytoreductive surgery...
June 2018: Oncology Letters
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