keyword
MENU ▼
Read by QxMD icon Read
search

Radiosensitivity

keyword
https://www.readbyqxmd.com/read/28550769/mk-8776-a-novel-chk1-inhibitor-exhibits-an-improved-radiosensitizing-effect-compared-to-ucn-01-by-exacerbating-radiation-induced-aberrant-mitosis
#1
Motofumi Suzuki, Tohru Yamamori, Tomoki Bo, Yuri Sakai, Osamu Inanami
Checkpoint kinase 1 (Chk1) is an evolutionarily conserved serine/threonine kinase that plays an important role in G2/M checkpoint signaling. Here, we evaluate the radiosensitizing effects of a novel selective Chk1 inhibitor MK-8776, comparing its efficacy with a first-generation Chk1 inhibitor UCN-01, and attempt to elucidate the mechanism of radiosensitization. In a clonogenic survival assay, MK-8776 demonstrated a more pronounced radiosensitizing effect than UCN-01, with lower cytotoxicity. Importantly, radiosensitization by MK-8776 can be achieved at doses as low as 2...
May 24, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28550688/long-noncoding-rna-crnde-prc2-participated-in-the-radiotherapy-resistance-of-human-lung-adenocarcinoma-through-targeting-p21-expression
#2
Ming Zhang, Change Gao, Yi Yang, Gaofeng Li, Jian Dong, Yiqin Ai, Nan Chen, Wenhui Li
Long noncoding RNAs (lncRNAs), as new class of functional regulators involved in human tumorigenesis, have been attracting increasing attention of researchers. The lncRNA Colorectal Neoplasia Differentially Expressed (CRNDE), transcribed from chromosome 16 on the strand opposite to the adjacent IRX5 gene, were originally found to be increased in CRC and was reported abnormal expressed in many cancers. However, its potential role and molecular mechanism underlying radioresistant phenotype formation of lung adenocarcinoma (LAD) remains unclear...
May 17, 2017: Oncology Research
https://www.readbyqxmd.com/read/28550662/-effects-of-simvastatin-on-the-proliferation-invasion-and-radiosensitivity-in-lewis-lung-cancer-cell-line
#3
S F Yu, J Cheng, S Geng, S Gao
Objective: To investigate the effects of simvastatin on proliferation, invasion and radiosensitivity of mouse Lewis lung cancer cell line in vitro. Methods: The inhibitory effects of simvastatin on proliferation of Lewis lung cancer cells were detected by MTT assay. Matrigel invasion and migration assay was used to determine the invasion and motility ability of the Lewis cells. P38 activity was measured by p38 activity detection kit, and the expressions of p-p38, MKP-1, RhoA and MMP-2 were analyzed by Western blot...
April 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28550350/recent-advances-in-the-study-of-immunodeficiency-and-dna-damage-response
#4
REVIEW
Tomohiro Morio
DNA breaks can be induced by exogenous stimuli or by endogenous stress, but are also generated during recombination of V, D, and J genes (V(D)J recombination), immunoglobulin class switch recombination (CSR). Among various DNA breaks generated, DNA double strand break (DSB) is the most deleterious one. DNA damage response (DDR) is initiated when DSBs are detected, leading to DNA break repair by non-homologous end joining (NHEJ). The process is critically important for the generation of diversity for foreign antigens; and failure to exert DNA repair leads to immunodeficiency such as severe combined immunodeficiency and hyper-IgM syndrome...
May 26, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28546757/microrna-381-enhances-radiosensitivity-in-esophageal-squamous-cell-carcinoma-by-targeting-x-linked-inhibitor-of-apoptosis-protein
#5
Suna Zhou, Yaoyou Cui, Dequan Yu, Jun Liang, Mingxin Zhang, Wenguang Ye
BACKGROUND: Increasing evidence indicates that radioresistance remains a major problem in the treatment of patients with esophageal squamous cell carcinoma (ESCC). This study was designed to investigate the expression of microRNA-381 (miR-381) and its function in the radioresistance of ESCC. METHODS: In this study, miR-381 expression was first detected in ESCC cell lines and tissue samples by quantitative real-time polymerase chain reaction (qRT-PCR). Then, the effects of miR-381 expression on growth, apoptosis, and radiosensitivity of ESCC cells were analyzed by MTT, colony formation, and flow cytometry, respectively...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28544661/early-passage-mesenchymal-stem-cells-display-decreased-radiosensitivity-and-increased-dna-repair-activity
#6
Po-Kuei Wu, Jir-You Wang, Cheng-Fong Chen, Kuang-Yu Chao, Ming-Chau Chang, Wei-Ming Chen, Shih-Chieh Hung
Cell therapies using human mesenchymal stem cells (MSCs) have received much attention in the past decade. In pursuit of the therapeutic potential of MSCs, cell expansion is required to generate a great number of cells with desired phenotype and functionality. Long-term expansion in vitro, however, can lead to altered functions. To explore the changes in DNA damage responses (DDR) in MSCs expanded, DDR pathways following irradiation were characterized in early- and late-passage bone marrow MSCs. Seventy-two hours after irradiation, the percentage of sub-G1 cells in early-passage MSCs did not change significantly...
June 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28542649/evaluation-of-connectivity-map-discovered-celastrol-as-a-radiosensitizing-agent-in-a-murine-lung-carcinoma-model-feasibility-study-of-diffusion-weighted-magnetic-resonance-imaging
#7
Hong Young Jun, Tae-Hoon Kim, Jin Woo Choi, Young Hwan Lee, Kang Kyoo Lee, Kwon-Ha Yoon
This study was designed to identify potential radiosensitizing (RS) agents for combined radio- and chemotherapy in a murine model of human lung carcinoma, and to evaluate the in vivo effect of the RS agents using diffusion-weighted magnetic resonance imaging (DW-MRI). Radioresistance-associated genes in A549 and H460 cells were isolated on the basis of their gene expression profiles. Celastrol was selected as a candidate RS by using connectivity mapping, and its efficacy in lung cancer radiotherapy was tested...
2017: PloS One
https://www.readbyqxmd.com/read/28541506/differences-in-responses-to-x-ray-exposure-between-osteoclast-and-osteoblast-cells
#8
Jian Zhang, Ziyang Wang, Anqing Wu, Jing Nie, Hailong Pei, Wentao Hu, Bing Wang, Peng Shang, Bingyan Li, Guangming Zhou
Radiation-induced bone loss is a potential health concern for cancer patients undergoing radiotherapy. Enhanced bone resorption by osteoclasts and decreased bone formation by osteoblasts were thought to be the main reasons. In this study, we showed that both pre-differentiating and differentiating osteoclasts were relatively sensitive to X-rays compared with osteoblasts. X-rays decreased cell viability to a greater degree in RAW264.7 cells and in differentiating cells than than in osteoblastic MC3T3-E1 cells...
May 25, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28539466/modeling-the-cellular-response-of-lung-cancer-to-radiation-therapy-for-a-broad-range-of-fractionation-schedules
#9
Jeho Jeong, Jung Hun Oh, Jan-Jakob Sonke, José S A Belderbos, Jeffrey D Bradley, Andrew N Fontanella, Shyam S Rao, Joe Deasy
To demonstrate that a mathematical model can be used to quantitatively understand tumor cellular dynamics during a course of radiotherapy, and to predict the likelihood of local control as a function of dose and treatment fractions.<br /><br />Experimental Design: We model outcomes for early-stage, localized non-small cell lung cancer (NSCLC), by fitting a mechanistic, cellular dynamics-based tumor control probability that assumes a constant local supply of oxygen and glucose. In addition to standard radiobiological effects such as repair of sub-lethal damage and the impact of hypoxia, we also accounted for proliferation as well as radiosensitivity variability within the cell cycle...
May 24, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28535302/inhibition-of-n-acetylglucosaminyltransferase-v-enhances-the-cetuximab-induced-radiosensitivity-of-nasopharyngeal-carcinoma-cells-likely-through-egfr-n-glycan-alterations
#10
Xiaomin Huang, Ting Liu, Qiongyao Wang, Weiliang Zhu, Hui Meng, Linlang Guo, Ting Wei, Jian Zhang
N-acetylglucosaminyltransferase V (GnT-V), an enzyme that catalyses the formation of the N-linked β-1-6 branching of oligosaccharides, is related to the radiosensitivity of nasopharyngeal carcinoma (NPC). Cetuximab (C225) is an epidermal growth factor receptor (EGFR) inhibitor used as a radiosensitizer in the treatment of NPC. In this study, we used GnT-V as a molecular target to further sensitize cetuximab-treated NPC cells to radiation. The results from two NPC cell lines (CNE1 and CNE2) revealed that the silencing of GnT-V enhanced cetuximab-induced radiosensitivity by decreasing the β-1-6 branching of oligosaccharides on the EGFR...
May 23, 2017: Glycobiology
https://www.readbyqxmd.com/read/28534701/plasma-mir-145-as-a-novel-biomarker-for-the-diagnosis-and-radiosensitivity-prediction-of-human-cervical-cancer
#11
Hu Wei, Chen Wen-Ming, Jiao Jun-Bo
Objectives The objective of this study was to evaluate levels of plasma miR-145 in patients with cervical cancer (CC) and investigate its biomarker potential. Methods Using qRT-PCR, we compared plasma miR-145 levels in 120 patients with CC, 120 patients with cervical intraepithelial neoplasia (CIN), and 120 healthy volunteers. The association between plasma miR-145 expression and clinicopathological factors, including radiation response, was also analyzed. Results Plasma miR-145 levels were lower in CC patient than in CIN patients and healthy controls...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28534328/-predictive-value-of-serum-carcinoembryonic-antigen-level-in-efficacy-and-prognosis-for-patients-with-rectal-cancer-following-preoperative-radiochemotherapy
#12
Dakui Zhang, Tiancheng Zhan, Ming Li, Jin Gu
OBJECTIVE: To examine the association of preoperative carcinoembryonic antigen (CEA) level with the efficacy of neoadjuvant radiochemotherapy and postoperative metastasis and relapse in patients with rectal cancer. METHODS: Between January 2011 and January 2014, 325 patients with local advanced rectal cancer underwent preoperative radiochemotherapy and radical operation in Department of Colorectal Cancer Surgery, Beijing University Cancer Hospital, including 194 males and 131 females...
May 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28533948/radiosensitization-effect-of-hsa-mir-138-2-3p-on-human-laryngeal-cancer-stem-cells
#13
Ying Zhu, Li-Yun Shi, Yan-Min Lei, Yan-Hong Bao, Zhao-Yang Li, Fei Ding, Gui-Ting Zhu, Qing-Qing Wang, Chang-Xin Huang
BACKGROUND: Treatments that target cancer stem cells play an important role in the controlling and eliminating of tumor initiation as well as in development, progression, and chemotherapy/radiotherapy resistance. In our previous study, we cultured and harvested human laryngeal cancer stem cells (CSCs) and applied microRNA biochips to screen differentially expressed miRNAs that were related to radiation tolerance in irradiated human laryngeal CSCs. According to the predicted genes and pathways of differential miRNAs target, down-regulated expression of hsa-miR-138-2-3p under radiation was thought to play a key role in enhancing the radio-sensitivity in human laryngeal squamous cancer stem cells...
2017: PeerJ
https://www.readbyqxmd.com/read/28533574/in-vitro-radiosensitizing-effects-of-temozolomide-on-u87mg-cell-lines-of-human-glioblastoma-multiforme
#14
Samira Borhani, Hossein Mozdarani, Somayyeh Babalui, Mohsen Bakhshandeh, Hassan Nosrati
BACKGROUND: Glioma is the most common primary brain tumor with poor prognosis. Temozolomide (TMZ) has been used with irradiation (IR) to treat gliomas. The aim of the present study was to evaluate the cytotoxic and radiosensitizing effect of TMZ when combined with high-dose and high-dose rate of gamma irradiation in vitro. METHODS: Two 'U87MG' cell lines and skin fibroblast were cultured and assigned to five groups for 24, 48, and 72 hours. The groups were namely, TMZ group (2000 μM/L), IR group (5 Gy), TMZ plus IR group, control group, and control solvent group...
May 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28529900/immunotherapy-and-radiation-therapy-for-operable-early-stage-and-locally-advanced-non-small-cell-lung-cancer
#15
REVIEW
Neil K Taunk, Andreas Rimner, Melissa Culligan, Joseph S Friedberg, Julie Brahmer, Jamie Chaft
Non-small cell lung cancer (NSCLC) is the most common cause of cancer mortality. Although a significant proportion of patients can be cured with surgery, with or without adjuvant or neoadjuvant chemotherapy and radiation, a significant proportion of patients will fail, particularly distantly. Over fifty percent of patients present with stage IV disease. There are multiple forms of immunotherapy available including T-cell transfer, cytokine therapy, and oncolytic viruses. Checkpoint inhibitors have shown tremendous activity in NSCLC and are currently under intense study given promising data on response...
April 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28529610/foretinib-enhances-the-radiosensitivity-in-esophageal-squamous-cell-carcinoma-by-inhibiting-phosphorylation-of-c-met
#16
Guang-Zong Chen, Wang-Shu Dai, Hong-Cheng Zhu, Hong-Mei Song, Xi Yang, Yuan-Dong Wang, Hua Min, Qian Lu, Shu Liu, Xin-Chen Sun, Xiao-Ning Zeng
As a crucial event involved in the metastasis and relapse of esophageal cancer, c-Met overexpression has been considered as one of the culprits responsible for the failure in patients who received radiochemotherapy. Since c-Met has been confirmed to be pivotal for cell survival, proliferation and migration, little is known about its impact on the regulation of radiosensitivity in esophageal cancer. The present study investigated the radiosensitization effects of c-Met inhibitor foretinib in ECA-109 and TE-13 cell lines...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28527427/photothermal-therapy-using-folate-conjugated-gold-nanoparticles-enhances-the-effects-of-6mv-x-ray-on-mouth-epidermal-carcinoma-cells
#17
Ali Neshastehriz, Mousa Tabei, Shayan Maleki, Samira Eynali, Ali Shakeri-Zadeh
The aim of this study was to develop an optimized method for preparation of folate conjugated gold nanoparticles (F-AuNPs) and to investigate its cytotoxic effects and cell apoptosis in combination with photothermal therapy (PTT) and radiotherapy (RT) for the treatment of mouth epidermal carcinoma cells KB. For this purpose, cells were treated with synthesized F-AuNPs at different concentrations for 6h and then irradiated them with laser beam (532nm, 0.5W/cm(2), 15min). After photothermal therapy, the cells were exposed to 6MV X-ray with a single dose of 2Gy...
May 12, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28525718/on-the-stability-of-the-parent-anion-of-the-potential-radiosensitizer-8-bromoadenine-formed-by-low-energy-3-ev-electron-attachment
#18
Robin Schürmann, Katrin Tanzer, Iwona Dabkowska, Stephan Paul Denifl, Ilko Bald
8-Bromoadenine (8BrA) is a potential DNA radiosensitizer for cancer radiation therapy due to its efficient interaction with low energy electrons (LEEs). LEEs are a short-living species generated during the radiation damage of DNA by high energy radiation as it is applied in cancer radiation therapy. Electron attachment to 8BrA in the gas phase results in a stable parent anion below 3 eV electron energy in addition to fragmentation products formed by resonant exocyclic bond cleavages. Density functional theory (DFT) calculations of the 8BrA- anion reveal an exotic bond between the bromine and the C8 atom with a bond length of 2...
May 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28514757/adhesion-and-stress-related-adaptation-of-glioma-radiochemoresistance-is-circumvented-by-%C3%AE-1-integrin-jnk-co-targeting
#19
Anne Vehlow, Erik Klapproth, Katja Storch, Ellen Dickreuter, Michael Seifert, Antje Dietrich, Rebecca Bütof, Achim Temme, Nils Cordes
Resistance of cancer stem-like and cancer tumor bulk cells to radiochemotherapy and destructive infiltration of the brain fundamentally influence the treatment efficiency to cure of patients suffering from Glioblastoma (GBM). The interplay of adhesion and stress-related signaling and activation of bypass cascades that counteract therapeutic approaches remain to be identified in GBM cells. We here show that combined inhibition of the adhesion receptor β1 integrin and the stress-mediator c-Jun N-terminal kinase (JNK) induces radiosensitization and blocks invasion in stem-like and patient-derived GBM cultures as well as in GBM cell lines...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28510338/therapeutic-targeting-of-poly-adp-ribose-polymerase-1-in-cancer-current-developments-therapeutic-strategies-and-future-opportunities
#20
REVIEW
Jyotika Rajawat, Nidhi Shukla, Durga Prasad Mishra
Poly(ADP-ribose) polymerase-1 (PARP1) is key protein involved in numerous cellular processes including DNA repair, replication, and transcription. PARP interacts directly, indirectly, or via PARylation with various oncogenic proteins and regulates several transcription factors, thereby modulating carcinogenesis. Therapeutic inhibition of PARP is therefore perceived as a promising anticancer strategy, and a number of PARP inhibitors (PARPi) are in different stages of clinical evaluation. PARPi inhibit the DNA repair pathway and thus form the concept of synthetic lethality in cancer therapeutics...
May 16, 2017: Medicinal Research Reviews
keyword
keyword
46382
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"