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https://www.readbyqxmd.com/read/28454482/effects-of-environmental-factors-and-metallic-electrodes-on-ac-electrical-conduction-through-dna-molecule
#1
S Abdalla, A Obaid, F M Al-Marzouki
BACKGROUND: Deoxyribonucleic acid (DNA) is one of the best candidate materials for various device applications such as in electrodes for rechargeable batteries, biosensors, molecular electronics, medical- and biomedical-applications etc. Hence, it is worthwhile to examine the mechanism of charge transport in the DNA molecule, however, still a question without a clear answer is DNA a molecular conducting material (wire), semiconductor, or insulator? The answer, after the published data, is still ambiguous without any confirmed and clear scientific answer...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28454478/enhanced-mri-t-2-relaxivity-in-contrast-probed-anchor-free-pegylated-iron-oxide-nanoparticles
#2
Bibek Thapa, Daysi Diaz-Diestra, Juan Beltran-Huarac, Brad R Weiner, Gerardo Morell
Superparamagnetic iron oxide nanoparticles (SPIONs, ~11-nm cores) were PEGylated without anchoring groups and studied as efficient MRI T 2 contrast agents (CAs). The ether group of PEG is efficiently and directly linked to the positively charged surface of SPIONs, and mediated through a dipole-cation covalent interaction. Anchor-free PEG-SPIONs exhibit a spin-spin relaxivity of 123 ± 6 mM(-1)s(-1), which is higher than those of PEG-SPIONs anchored with intermediate biomolecules, iron oxide nanoworms, or Feridex...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28454476/parp-inhibition-sensitizes-endometrial-cancer-cells-to-paclitaxel-induced-apoptosis
#3
Christine Dinkic, Friederike Jahn, Marek Zygmunt, Florian Schuetz, Joachim Rom, Christof Sohn, Herbert Fluhr
PARP inhibitors are used in the treatment of gynecological malignancies and it has been demonstrated in preclinical studies that PARP inhibition sensitizes cancer cells to cytotoxic agents. In the present study, PARP expression was detected in different endometrial cancer cell lines by western blot analysis, and PARP activity was measured using an enzymatic assay. In addition, the endometrial cancer cell lines were treated with paclitaxel or carboplatin in combination with the PARP inhibitor PJ34 prior to a cell viability assay and apoptotic nuclei measurement...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454475/oridonin-induces-g2-m-cell-cycle-arrest-and-apoptosis-via-the-pi3k-akt-signaling-pathway-in-hormone-independent-prostate-cancer-cells
#4
Jianlei Lu, Xiang Chen, Shuang Qu, Bing Yao, Yuexin Xu, Jiahui Wu, Yucui Jin, Changyan Ma
Oridonin is an active constituent isolated from the traditional Chinese herb Rabdosia rubescens, which exerts antitumor effects in experimental and clinical settings. However, its antitumor effects and underlying mechanisms on prostate cancer cells have not yet been clearly identified. In the present study, the androgen-independent prostate cancer PC3 and DU145 cell lines were used as models to investigate the effects and possible mechanisms of oridonin on cellular proliferation and apoptosis. Results demonstrated that oridonin inhibited cellular proliferation, and was able to significantly induce G2/M cell cycle arrest and apoptosis...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454472/hsp90-inhibitor-sy-016-induces-g2-m-arrest-and-apoptosis-in-paclitaxel-resistant-human-ovarian-cancer-cells
#5
Hyun Gyo Lee, Won Jin Park, So Jin Shin, Sang Hoon Kwon, Soon Do Cha, Young Ho Seo, Ju Hui Jeong, Ji Yoon Lee, Chi Heum Cho
The aim of the present study was to evaluate the in vitro effect of a heat shock protein (Hsp)90 inhibitor, SY-016, on the paclitaxel (PTX)-resistant human ovarian cancer cell line OVCAR-3PTX, and explore its mechanism of apoptosis. In the present study, SY-016 was used in combination with PTX to determine its effect on the cell proliferation and apoptosis of OVCAR-3PTX cells. The drug-resistant tumor cells were established in vitro by stepwise sequential exposure to increasing concentrations of PTX. The cell viability and cell cycle distribution were measured by MTT assay and flow cytometric analysis, respectively...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454469/regulation-of-cytotoxicity-and-apoptosis-associated-pathways-contributes-to-the-enhancement-of-efficacy-of-cisplatin-by-baicalein-adjuvant-in-human-a549-lung-cancer-cells
#6
Suparata Kiartivich, Ying Wei, Jiaqi Liu, Rungtip Soiampornkul, Mihui Li, Hongying Zhang, Jingcheng Dong
Scutellaria baicalensis (SB; Chinese name, huangqin) is widely used in Chinese medicine as a traditional adjuvant in the chemotherapy of lung and liver cancer. Baicalein is one of the bioactive flavonoid components isolated from the root of SB. The present study aimed to observe the effect of baicalein, in combination with platin-based systemic chemotherapy (cisplatin), on cytotoxicity and apoptosis of human A549 lung cancer cells. The cell cultures were treated with baicalein, cisplatin, or a combination of the two...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454468/ethanolic-extract-of-thevetia-peruviana-flowers-enhances-tnf-%C3%AE-and-trail-induced-apoptosis-of-human-cervical-cancer-cells-via-intrinsic-and-extrinsic-pathways
#7
Chittima Managit, Hiroaki Sakurai, Ikuo Saiki
Tumor necrosis factor-α (TNF-α) and TNF-related apoptosis-inducing ligand (TRAIL) are promising candidates for cancer treatment due to their ability to induce apoptosis through death receptor stimulation. However, their usage may be limited due to the resistance of cancer cells to TNF-α- and TRAIL-induced apoptosis. Currently, there is interest in screening for natural products that can sensitize cancer cells to TNF-α- and TRAIL-induced apoptosis for their use in combination with TNF-α or TRAIL. It was previously reported that the bark extract of Thevetia peruviana showed a reversal effect on TRAIL-resistance in human gastric adenocarcinoma cell lines...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454466/identification-of-molecular-characteristics-induced-by-radiotherapy-in-rectal-cancer-based-on-microarray-data
#8
Chang Ge, Mengxia Wu, Guifang Chen, Guanying Yu, Dehui Ji, Shaozhao Wang
The present study aimed to reveal the molecular characteristics induced by radiotherapy in rectal cancer at the transcriptome level. Microarray data (ID, GSE26027) downloaded from the Gene Expression Omnibus database were re-analyzed to identify differentially expressed genes (DEGs) between rectal cancer tissues during and prior to radiotherapy. The DEGs were then inputted into the database for annotation, visualization and integrated discovery, an online tool to perform enrichment analyses, and into the search tool for the retrieval of interacting genes/proteins database to identify protein-protein interactions (PPIs)...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454460/melatonin-treatment-induces-apoptosis-through-regulating-the-nuclear-factor-%C3%AE%C2%BAb-and-mitogen-activated-protein-kinase-signaling-pathways-in-human-gastric-cancer-sgc7901-cells
#9
Weimin Li, Zhonglue Wang, Yina Chen, Kaijing Wang, Ting Lu, Fei Ying, Mengdi Fan, Zhiyin Li, Jiansheng Wu
Melatonin, which is synthesized by the pineal gland and released into the blood, exhibits antitumor properties. However, the mechanisms underlying these effects, particularly in stomach cancer, remain unknown. In the present study, the effect of melatonin on the nuclear factor (NF)-κB signaling pathway and the mitogen-activated protein kinase signaling pathway, involving p38 and c-Jun-N-terminal kinase (JNK), were investigated in SGC7901 gastric cancer cells. In addition, the effect of melatonin on the survival, migration and apoptosis of these cells was investigated in vitro in order to evaluate the use of melatonin for the treatment of gastric cancer...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454459/expression-of-cxcl12-and-its-receptor-cxcr4-in-patients-with-adenomyosis
#10
Juan Li, Geping Yin, Ming Chen, Shujun Yang, Aifang Wu, Jing Liang, Zheng Yuan
The aim of the present study was to investigate the role of chemokine (C-X-C motif) ligand 12 (CXCL12) and its receptor, chemokine (C-X-C motif) receptor 4 (CXCR4) in the pathogenesis of adenomyosis (AD). Immunohistochemistry and reverse transcription-quantitative polymerase chain reaction analysis were used to measure the protein and mRNA expression of CXCL12 and CXCR4 in eutopic endometrial and ectopic foci tissue samples. Samples from a total of 36 patients with AD (study group) were compared with endometrial tissue samples from 33 patients who underwent uterine fibroids surgery (control group) during the same period...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454458/survivin-downregulation-using-sirna-nanoliposomes-inhibits-cell-proliferation-and-promotes-the-apoptosis-of-mhcc-97h-hepatic-cancer-cells-an-in-vitro-and-in-vivo-study
#11
Ziqin Liu, Tianyou Wang, Zhaoxia Zhang, Suoqin Tang, Shunqiao Feng, Mei Yue, Mengze Hu, Litian Xuan, Yanfei Chen
At present, survivin is one of the most cancer-specific proteins that has been identified. The present study aimed to investigate the antitumor effects of novel survivin small interfering RNA (siRNA) nanoliposomes targeting survivin in human hepatocellular carcinoma MHCC-97H cells and xenograft mouse models. Survivin-targeted siRNA nanoliposomes were prepared and transfected into MHCC-97H cells and MHCC-97H-bearing nude mice. Survivin expression was analyzed using reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blotting...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454454/chemotherapy-regimen-based-on-sorafenib-combined-with-5-fu-on-hif-1%C3%AE-and-vegf-expression-and-survival-in-advanced-gastric-cancer-patients
#12
Ronghui Cheng, Hongmei Yong, Yunhong Xia, Qingsong Xie, Guangyi Gao, Xueyi Zhou
The present study investigated the effect of combined sorafenib chemotherapy on hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) expression and survival time of patients with advanced gastric cancer. From January 2010 to December 2011, 92 patients diagnosed with advanced gastric cancer were selected and randomly divided into the treatment group and control group. The treatment group was treated with sorafenib chemotherapy combined with 5-fluorouracil (5-FU), and the control group received 5-FU...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454451/expression-of-glp-1-receptor-and-cd26-in-human-thyroid-c-cells-the-association-of-thyroid-c-cell-tumorigenesis-with-incretin-based-medicine
#13
Yuejia Song, Min Zhou, Yang Cao, Jiping Qi, Jingshu Geng, Xiaomin Liu
Recent reports have demonstrated that long-term and high dosage treatments with incretin-based medicine, such as hormone glucagon-like peptide-1 (GLP-1) may induce thyroid C-cell pathological changes in rodents, rather than in humans. Doubts regarding the tumorigenic potential of GLP-1 analogues in human thyroid C-cells remain. The present study aimed to determine the expression levels of GLP-1 receptor (GLP-1R) and cluster of differentiation 26 (CD26) in the C-cells of thyroid tissues from non-neoplastic, medullary carcinoma and hyperplasia subjects, and to explore the potential clinical significance...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454445/role-of-reactive-oxygen-species-in-the-anticancer-activity-of-botanicals-comparing-sensitivity-profiles
#14
Zoya Cohen, Yair Maimon, Noah Samuels, Raanan Berger
Numerous botanicals have been shown to exhibit in vitro and in vivo anticancer activity, some of which is the result of the induction of reactive oxygen species (ROS) in cancer cells with a high ROS content. The present study compared sensitivities to a series of botanicals among cancer cell lines, using an XTT viability test, in order to create a specific cancer-herb profile. Of the 27 botanicals screened, 10 exhibited a cytotoxic effect, 7 of which were ROS-mediated. The sensitivity profiles of the ROS-inducing botanicals in 10 cancer cell lines were similar, unlike 3 cytotoxic ROS-independent botanicals that displayed divergent botanical-specific profiles...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454441/microrna-130b-promotes-cell-migration-and-invasion-by-inhibiting-peroxisome-proliferator-activated-receptor-%C3%AE-in-human-glioma
#15
Peidong Li, Xinjun Wang, Qiao Shan, Yuehui Wu, Zhen Wang
Glioma is the most common and aggressive type of primary brain tumor. MicroRNA (miR)-130b functions as a tumor-associated miR. The dysregulation of miR-130b is involved in numerous biological characteristics and properties of certain types of cancer. The present study revealed the function and possible molecular mechanism of miR-130b in glioma cells, reporting that the level of miR-130b was markedly higher, increasing progressively as the histologic grade of the glioma increased, compared with the level in normal tissues...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454439/oct4-induces-emt-through-lef1-%C3%AE-catenin-dependent-wnt-signaling-pathway-in-hepatocellular-carcinoma
#16
Lu Sun, Tianhua Liu, Shu Zhang, Kun Guo, Yinkun Liu
Octamer 4 (Oct4), a member of the Pit-Oct-Unc transcription factor family required to maintain self-renewal and pluripotency of embryonic stem cells, has been previously identified to be associated with tumorigenesis and malignant transformation of numerous types of cancer including hepatocellular carcinoma (HCC). The present data shows that Oct4 enhances cancer stem cell properties and increases invasion ability in the Huh7 cell line. To increase understanding of the role of Oct4 in HCC, the present study used a functional genomics approach and analyzed the resulting transcriptional profiles to identify Oct4-dependent genes in Huh7...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454438/chk2-is-involved-in-the-p53-independent-radiosensitizing-effects-of-valproic-acid
#17
Dong Wan Choo, Sung Ho Goh, Young Woo Cho, Hye Jung Baek, Eun Jung Park, Noboru Motoyama, Tae Hyun Kim, Joo Young Kim, Sang Soo Kim
Radiotherapy is an effective treatment for the majority of types of localized solid cancer. However, the risk of side effects to the surrounding normal tissues limits radiotherapeutic approaches. Whilst the mechanism of action of valproic acid, an inhibitor of histone deacetylase, remains unknown, the inhibitor is a potential antineoplastic radiosensitizer. The present study demonstrated the in vitro radiosensitizing effects of valproic acid on the human breast cancer MCF7 cell line, and revealed that valproic acid increased the level of DNA breakage, apoptosis and senescence...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454433/deregulation-of-mir-193b-affects-the-growth-of-colon-cancer-cells-via-transforming-growth-factor-%C3%AE-and-regulation-of-the-smad3-pathway
#18
Kaiming Wu, Zhenxian Zhao, Jun Ma, Jianhui Chen, Jianjun Peng, Shibin Yang, Yulong He
MicroRNA-193b (miRNA-193b) is often differentially expressed and is an important regulator of gene expression in colon cancer. The aim of the present study was to determine whether miRNA-193b affects cell growth in colon cancer and to investigate the potential underlying mechanisms. Patients with colorectal cancer (CRC; n=20) and healthy volunteers (n=10) were enrolled from the Department of Gastrointestinal Surgery Center, First Affiliated Hospital of Sun Yat-Sen University (Guangzhou, China). Western blot analysis was used to evaluate the protein expression of SMAD3 and transforming growth factor-β (TGF-β) in the patient samples...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454429/polyphenolic-compounds-from-korean-lonicera-japonica-thunb-induces-apoptosis-via-akt-and-caspase-cascade-activation-in-a549-cells
#19
Kwang Il Park, Hyeonsoo Park, Arulkumar Nagappan, Gyeong Eun Hong, Silvia Yumnam, Ho Jeong Lee, Eun Hee Kim, Won Sup Lee, Sung Chul Shin, Jin A Kim, Sang Joon Lee, Jin Yeul Ma, Taesun Min, Jeong Doo Heo, Gon Sup Kim
Lonicera japonica Thunb. (L. japonica T.) has historically been used in Korean herbal medicine due to its anticancer and protective effects on the respiratory system. In the present study, the polyphenolic compounds in L. japonica T. were investigated using high-performance liquid chromatography coupled with tandem mass spectrometry, and its anticancer effects on A549 non-small-cell lung cancer cells were studied. Polyphenolic compounds potentially inhibit A549 cells in a dose-dependent manner. Flow cytometry and western blot analysis demonstrated that polyphenolic compounds induce apoptosis by regulating the protein expression levels of caspases, poly-(ADP-ribose) polymerase and the B-cell lymphoma-2-associated X-protein/B-cell lymphoma-extra large ratio...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454428/the-regulation-of-proteins-associated-with-the-cytoskeleton-by-hepatitis-b-virus-x-protein-during-hepatocarcinogenesis
#20
Fanyun Kong, Hongjuan You, Renxian Tang, Kuiyang Zheng
Hepatocellular carcinoma (HCC) is a major malignant disease worldwide, and chronic hepatitis B virus (HBV) infection is one of the primary causes for this type of cancer. Hepatitis B virus X protein (HBx) is a non-structural protein encoded by the viral genome that has significant effects on the pathogenesis of HCC. With the development of high-throughput assays and technologies, the abnormal HBx-induced expression of certain cellular proteins with assorted biological functions has been investigated. These target proteins identified by various methods include specific proteins associated with the cellular cytoskeleton, which contribute to HBx-induced hepatocarcinogenesis...
April 2017: Oncology Letters
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