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Chemosensitivity Test

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https://www.readbyqxmd.com/read/30083105/ascorbic-acid-chemosensitizes-colorectal-cancer-cells-and-synergistically-inhibits-tumor-growth
#1
Ana S Pires, Cláudia R Marques, João C Encarnação, Ana M Abrantes, Inês A Marques, Mafalda Laranjo, Rui Oliveira, João E Casalta-Lopes, Ana C Gonçalves, Ana B Sarmento-Ribeiro, Maria F Botelho
Colorectal cancer (CRC) is continuously classified as one of the most incidental and mortal types of cancer worldwide. The positive outcomes of the conventional chemotherapy are frequently associated with high toxicity, which often leads to the suspension of the treatment. Growing evidences consider the use of pharmacological concentrations of ascorbic acid (AA), better known as vitamin C, in the treatment of cancer. The use of AA in a clinical context is essentially related to the adoption of new therapeutic strategies based on combination regimens, where AA plays a chemosensitizing role...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/30082520/association-of-base-excision-repair-gene-polymorphisms-with-the-response-to-chemotherapy-in-advanced-non-small-cell-lung-cancer
#2
Jie Dong, Xu Wang, Yu Yu, Xu Yan, Jiu-Wei Cui
Background: Base excision repair (BER) plays an important role in the maintenance of genome integrity and anticancer drug resistance. This study aimed to explore the role of BER gene polymorphisms in response to chemotherapy for advanced non-small cell lung cancer (NSCLC) patients treated with platinum-based chemotherapy. Methods: During the period from November 2009 to January 2016, a total of 152 patients diagnosed with NSCLC Stage IIIB and IV in the First Hospital of Jilin University were admitted into this study...
August 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/30039475/therapeutic-potential-of-dnazyme-loaded-on-chitosan-cyclodextrin-nanoparticle-to-recovery-of-chemosensitivity-in-the-mcf-7-cell-line
#3
Elham Zokaei, Arastoo Badoei-Dalfrad, Mehdi Ansari, Zahra Karami, Touba Eslaminejad, Seyed Noureddin Nematollahi-Mahani
Commonly, acquired resistances to anticancer drug are mediated by overexpression of a membrane-associated protein that encode via multi-drug resistance gene-1 (MDR1). Herein, the mRNA-cleaving DNAzyme that targets the mRNA of MDR1 gene in doxorubicin-resistant breast cancer cell line (MCF-7/DR) loaded on the chitosan β-cyclodextrin complexes was used as a tropical agent. Chitosan/β-cyclodextrin complexes were used to deliver DNAzymes into cancer cells. Determination of the physicochemical characteristics of the particles was done by photon correlation spectroscopy and scanning electron microscopy...
July 24, 2018: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/30019100/chemosensitivity-of-various-peritoneal-cancer-cell-lines-to-hipec-and-pipac-comparison-of-an-experimental-duplex-drug-to-standard-drug-regimens-in-vitro
#4
Jürgen Weinreich, Florian Struller, Iaroslav Sautkin, Shalva Giuashvili, Marc Reymond, Alfred Königsrainer, Timm C Schott
We performed an in-vitro study testing the chemosensitivity of peritoneal cancer cell lines (SW620, HCT116, MKN45, 23,132/87, OAW42) to various cytostatic drug regimens. A duplex drug, characterized by reversible linking of the antimetabolites 2'-deoxy-5-fluorouridine (5-FdU) and 3'-C-ethynylcytidine (ECyd), was compared to oxaliplatin or to cisplatin plus doxorubicin. The experiments were designed to reflect the conditions of intraperitoneal chemotherapy. CASY® (Cell Analysis System) technology was used to compare the impact of incubation temperature/duration and drug concentration on the viability of the cancer cell lines versus normal human dermal fibroblasts...
July 18, 2018: Investigational New Drugs
https://www.readbyqxmd.com/read/30004292/reversing-antimicrobial-resistance-in-multidrug-resistant-klebsiella-pneumoniae-of-clinical-origin-using-1-1-naphthylmethyl-piperazine
#5
João Anes, Marta Martins, Séamus Fanning
Eleven clinical Klebsiella pneumoniae fluoroquinolone-resistant isolates were tested to access the potential of adjuvant therapies to reduce antimicrobial resistance using fixed concentrations of the chemosensitizers chlorpromazine (CPZ), thioridazine (TZ), phenylalanine-arginine-β-naphthylamide (PAβN), and 1-(1-naphthylmethyl)-piperazine-(NMP) with varying concentrations of antimicrobial agents nalidixic acid (NAL), ciprofloxacin (CIP), moxifloxacin (MXF), tetracycline (TET), and chloramphenicol (CHL). Ethidium bromide dye was used together with the chemosensitizers to investigate permeabilization effects...
July 13, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/30003967/isolated-adult-turtle-brainstems-exhibit-central-hypoxic-chemosensitivity
#6
Michelle E Bartman, Stephen M Johnson
During hypoxia, red-eared slider turtles increase ventilation and decrease episodic breathing, but whether these responses are due to central mechanisms is not known. To test this question, isolated adult turtle brainstems were exposed to 240 min of hypoxic solution (bath PO2  = 32.6 ± 1.2 mmHg) and spontaneous respiratory-related motor bursts (respiratory event) were recorded on hypoglossal nerve roots. During hypoxia, burst frequency increased during the first 15 min, and then decreased during the remaining 35-240 min of hypoxia...
July 9, 2018: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/30001265/preoperative-omental-metastasis-related-maximum-standardized-fluorine-18-fluorodeoxyglucose-uptake-value-can-predict-chemosensitivity-and-recurrence-in-advanced-high-grade-serous-ovarian-cancer-patients
#7
Yuyun Sun, Shuai Liu, Zheng Feng, Jingyi Cheng, Linjun Lu, Mingwei Wang, Huiyu Yuan, Junyan Xu, Yingjian Zhang
OBJECTIVE: The aim of this study was to explore the clinical and prognostic implication of preoperative fluorine-18-fluorodeoxyglucose uptake value of omental metastasis-related in advanced high-grade serous ovarian cancer patients (HGSC). PATIENTS AND METHODS: We retrospectively investigated HGSC patients with omental metastasis (International Federation of Gynecology and Obstetrics stage IIIB-IV) who underwent PET/CT before primary surgery in our hospital between January 2010 and January 2016...
August 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29990840/mir-125a-3p-is-responsible-for-chemosensitivity-in-pdac-by-inhibiting-epithelial-mesenchymal-transition-via-fyn
#8
Guodong Liu, Liandong Ji, Mujing Ke, Zhenglin Ou, Neng Tang, Yixiong Li
BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers and resistance to cytotoxic chemotherapy is the major cause of mortality in PDAC patients. miR-125a-3p was found to be down-regulated in PDAC cells; however, the function of miR-125a-3p in PDAC has been elusive. Here, we explored the role of miR-125a-3p in chemosensitivity in PDAC cells. METHODS: We used qRT-PCR to detect miR-125a-3p expression in two PDAC cell lines. And we measured cell viability and apoptosis by MTT assay and flow cytometry, respectively...
July 2, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29986635/silencing-of-eno1-by-shrna-inhibits-the-proliferation-of-gastric-cancer-cells
#9
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/29970483/a-chemosensitivity-study-of-colorectal-cancer-using-xenografts-of-patient-derived-tumor-initiating-cells
#10
Hisatsugu Maekawa, Hiroyuki Miyoshi, Tadayoshi Yamaura, Yoshiro Itatani, Kenji Kawada, Yoshiharu Sakai, M Mark Taketo
Current genomic and gene expression analyses provide versatile tools to improve cancer chemotherapy. However, it is still difficult to predict whether each patient responds to a particular regimen or not. To predict chemosensitivity in each colorectal cancer patient, we developed an evaluation method using the primary tumor initiating cells (TIC, aka cancer stem cells) xenografted in nude mice subcutaneously (patient-derived spheroid xenografts; PDSXs). Simultaneously, we also prepared the conventional patient-derived xenografts (PDXs) from the same patients' tumors, and compared the dosing results with those of PDSXs...
July 3, 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29953965/microrna-17-inhibition-overcomes-chemoresistance-and-suppresses-epithelial-mesenchymal-transition-through-a-dedd-dependent-mechanism-in-gastric-cancer
#11
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/29941481/the-combination-of-the-parp-inhibitor-olaparib-and-the-wee1-inhibitor-azd1775-as-a-new-therapeutic-option-for-small-cell-lung-cancer
#12
Alice Lallo, Kristopher K Frese, Christopher Morrow, Robert Szczepaniak Sloane, Sakshi Gulati, Maximilian W Schenk, Francesca Trapani, Nicole Simms, Melanie Galvin, Stewart Brown, Cassandra L Hodgkinson, Lynsey Priest, Adina M Hughes, Zhongwu Lai, Elaine B Cadogan, Garima Khandelwal, Kathryn L Simpson, Crispin Miller, Fiona H Blackhall, Mark J O'Connor, Caroline Dive
PURPOSE: Introduced in 1987, platinum-based chemotherapy remains standard of care for small cell lung cancer, a most aggressive, recalcitrant tumor. Prominent barriers to progress are paucity of tumor tissue to identify drug targets and patient relevant models to interrogate novel therapies. Following our development of circulating tumour cell patient-derived explants (CDX) as models that faithfully mirror patient disease, here we exploit CDX to examine new therapeutic options for small cell lung cancer...
June 25, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29928353/identification-of-proteins-associated-with-paclitaxel-resistance-of-epithelial-ovarian-cancer-using-itraq-based-proteomics
#13
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
https://www.readbyqxmd.com/read/29923053/reduced-expression-of-dna-repair-genes-and-chemosensitivity-in-1p19q-codeleted-lower-grade-gliomas
#14
Lei Tang, Lu Deng, Harrison X Bai, James Sun, Natalie Neale, Jing Wu, Yinyan Wang, Ken Chang, Raymond Y Huang, Paul J Zhang, Xuejun Li, Bo Xiao, Ya Cao, Yongguang Tao, Li Yang
BACKGROUND: Lower-grade gliomas (LGGs, defined as WHO grades II and III) with 1p19q codeletion have increased chemosensitivity when compared to LGGs without 1p19q codeletion, but the mechanism is currently unknown. METHODS: RNAseq data from 515 LGG patients in the Cancer Genome Atlas (TCGA) were analyzed to compare the effect of expression of the 9 DNA repair genes located on chromosome arms 1p and 19q on progression free survival (PFS) and overall survival (OS) between patients who received chemotherapy and those who did not...
June 19, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29807624/high-throughput-scaffold-based-3d-micro-tumor-array-for-efficient-drug-screening-and-chemosensitivity-testing
#15
Xiaojun Yan, Lyu Zhou, Zhaozhao Wu, Xun Wang, Xiuyuan Chen, Fan Yang, Yanan Guo, Min Wu, Yuyang Chen, Wenjing Li, Jun Wang, Yanan Du
Oncology drug development is greatly hampered by inefficient drug screening using 2D culture. Herein, we present ready-to-use micro-scaffolds in 384-well format to generate uniform 3D micro-tumor array (3D-MTA, CV < 0.15) that predicts in vivo drug responses more accurately than 2D monolayer. 3D-MTA generated from both cell lines and primary cells achieved high screen quality (Z' > 0.5), and were compatible with standard high throughput and high content instruments. Doxorubicin identified by 3D-MTA and 2D successfully inhibited tumor growth in mice bearing lung cancer cell line (H226) xenografts, but not gemcitabine and vinorelbine, which were selected solely by 2D...
May 16, 2018: Biomaterials
https://www.readbyqxmd.com/read/29800556/celecoxib-inhibits-mitochondrial-o-2-consumption-promoting-ros-dependent-death-of-murine-and-human-metastatic-cancer-cells-via-the-apoptotic-signalling-pathway
#16
Rhys Pritchard, Sara Rodríguez-Enríquez, Silvia Cecilia Pacheco-Velázquez, Vuk Bortnik, Rafael Moreno-Sánchez, Stephen Ralph
Capecitabine induced toxicities such as hand-foot syndrome (HFS) and progression of metastatic cancer are both treatable with concurrent celecoxib as shown in the ADAPT (Activating Cancer Stem Cells from Dormancy And Potentiate for Targeting) trial. In the present study, five commonly used NSAIDs, including celecoxib were compared for their pro-oxidative capacities as cytotoxic drugs against human and mouse metastatic melanoma or breast cancer cells in vitroand the source of cellular ROS production induced by celecoxib was examined in greater detail...
August 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29779317/-the-expression-of-klk7-in-pancreatic-cancer-and-the-effects-on-the-biological-behavior-of-pancreatic-cancer-cells
#17
S L Zheng, M Y Feng, G Yang, G B Xiong, L F Zheng, T P Zhang, Y P Zhao
Objective: To investigate the expression of KLK7 in pancreatic cancer and its clinical significance. Methods: Immunohistochemistry was used to detect the expression of KLK7 protein in pancreatic cancer tissue microarray with 92 samples. Statistical analysis of the relationship between KLK7 and clinicopathological characteristics was finished. Pancreatic cancer cell lines were infected with lentiviuses in order to get cells with KLK7 stable overexpression.KLK7-siRNA was transfected into pancreatic cancer cells to knock down KLK7...
May 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29771717/prognostic-predictive-value-of-preoperative-intratumoral-2-deoxy-2-18f-fluoro-d-glucose-uptake-heterogeneity-in-patients-with-high-grade-serous-ovarian-cancer
#18
Shuai Liu, Zheng Feng, Zhaoxia Jiang, Hao Wen, Junyan Xu, Herong Pan, Yu Deng, Lei Zhang, Xingzhu Ju, Xiaojun Chen, Xiaohua Wu
OBJECTIVE: This study aimed to explore the clinical and prognostic significance of pretreatment positron-emission tomography/computed tomography (PET/CT) parameters, especially 2-deoxy-2-(F)fluoro-D-glucose-based heterogeneity, in high-grade serous ovarian cancer (HGSC). MATERIALS AND METHODS: We retrospectively investigated 56 patients with HGSC who underwent PET/CT before primary surgery at our hospital between January 2010 and June 2015. None of these patients received neoadjuvant chemotherapy...
May 16, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29748013/loss-of-c-ebp-%C3%AE-lip-drives-cisplatin-resistance-in-malignant-pleural-mesothelioma
#19
Joanna Kopecka, Iris C Salaroglio, Luisella Righi, Roberta Libener, Sara Orecchia, Federica Grosso, Vladan Milosevic, Preeta Ananthanarayanan, Luisa Ricci, Enrica Capelletto, Monica Pradotto, Francesca Napoli, Massimo Di Maio, Silvia Novello, Menachem Rubinstein, Giorgio V Scagliotti, Chiara Riganti
OBJECTIVES: Cisplatin-based chemotherapy is moderately active in malignant pleural mesothelioma (MPM) due to intrinsic drug resistance and to low immunogenicity of MPM cells. CAAT/enhancer binding protein (C/EBP)-β LIP is a pro-apoptotic and chemosensitizing transcription factor activated in response to endoplasmic reticulum (ER) stress. MATERIALS AND METHODS: We investigated if LIP levels can predict the clinical response to cisplatin and survival of MPM patients receiving cisplatin-based chemotherapy...
June 2018: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29729190/baicalein-targets-gtpase-mediated-autophagy-to-eliminate-liver-tumor-initiating-stem-cell-like-cells-resistant-to-mtorc1-inhibition
#20
Raymond Wu, Ramachandran Murali, Yasuaki Kabe, Samuel W French, Yi-Ming Chiang, Siyu Liu, Linda Sher, Clay C Wang, Stan Louie, Hidekazu Tsukamoto
Drug resistance is a major problem in the treatment of liver cancer. mTORC1 inhibitors have been tested for the treatment of liver cancer based on hyperactive mTOR in this malignancy. However, their clinical trials showed poor outcome due likely to their ability to upregulate CD133 and promote chemoresistance. CD133+ tumor initiating stem cell-like cells (TICs) isolated from mouse and human liver tumors are chemoresistant, and identification of an approach to abrogate this resistance is desired. In search for a compound which rescinds TIC's resistance to mTORC1 inhibition and improves chemotherapy, we identified baicalein (BC) which selectively chemosensitizes TICs and the human HCC cell line Huh7 cells but not mouse and human primary hepatocytes...
May 5, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
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