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https://www.readbyqxmd.com/read/28440463/livin-enhances-chemoresistance-in-head-and-neck-squamous-cell-carcinoma
#1
Tae Mi Yoon, Sun-Ae Kim, Dong Hoon Lee, Joon Kyoo Lee, Young-Lan Park, Kyung-Hwa Lee, Ik-Joo Chung, Young-Eun Joo, Sang Chul Lim
The responsiveness of head and neck squamous cell carcinoma (HNSCC) to chemotherapy widely affects prognosis. Overcoming chemoresistance is necessary to improve prognoses in patients with advanced HNSCC. Evasion of apoptosis by cancer cells is a major cause of chemoresistance. Livin, a member of the human inhibitors of apoptosis protein family, is highly expressed in various human cancer tissues and is associated with tumor progression and poor prognosis in human cancers. The aim of the present study was to evaluate the role of Livin in the susceptibility to popularly used chemotherapeutic drugs such as cisplatin, 5-fluorouracil (FU) and docetaxel in human HNSCC cell lines (SNU1041, PCI1 and PCI50 cells)...
April 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28435473/downregulation-of-mitochondrial-cyclooxygenase-2-inhibits-the-stemness-of-nasopharyngeal-carcinoma-by-decreasing-the-activity-of-dynamin-related-protein-1
#2
Teng-Jian Zhou, Shi-Li Zhang, Cheng-Yong He, Qun-Ying Zhuang, Pei-Yu Han, Sheng-Wei Jiang, Huan Yao, Yi-Jun Huang, Wen-Hua Ling, Yu-Chun Lin, Zhong-Ning Lin
Cancer stem cells (CSCs) are a small subset of malignant cells, possessing stemness, with strong tumorigenic capability, conferring resistance to therapy and leading to the relapse of nasopharyngeal carcinoma (NPC). Our previous study suggested that cyclooxygenase-2 (COX-2) would be a novel target for the CSCs-like side population (SP) cells in NPC. In the present study, we further found that COX-2 maintained the stemness of NPC by enhancing the activity of mitochondrial dynamin-related protein 1 (Drp1), a mitochondrial fission mediator, by studying both sorted SP cells from NPC cell lines and gene expression analyses in NPC tissues...
2017: Theranostics
https://www.readbyqxmd.com/read/28435470/downregulation-of-sirt7-by-5-fluorouracil-induces-radiosensitivity-in-human-colorectal-cancer
#3
Ming Tang, Xiaopeng Lu, Chaohua Zhang, Changzheng Du, Linlin Cao, Tianyun Hou, Zhiming Li, Bo Tu, Ziyang Cao, Yinglu Li, Yongcan Chen, Lu Jiang, Hui Wang, Lina Wang, Baohua Liu, Xingzhi Xu, Jianyuan Luo, Jiadong Wang, Jin Gu, Haiying Wang, Wei-Guo Zhu
5-Fluorouracil (5-FU) combined with radiotherapy is a common treatment strategy to treat human cancers, but the underlying mechanisms of this combination treatment remain unclear. Here, we report that NAD(+)-dependent deacetylase sirtuin-7 (SIRT7) protein levels were decreased due to 5-FU exposure rendering colorectal cancer cells sensitive to radiation. We found that SIRT7 downregulation was mediated via a Tat-binding Protein 1 (TBP1) proteasome-dependent pathway. Specifically, TBP1 was dephosphorylated at tyrosine 381 upon 5-FU treatment, which enhanced its direct interaction with SIRT7 and targeted it for degradation...
2017: Theranostics
https://www.readbyqxmd.com/read/28435398/the-changes-of-tumour-vascular-endothelial-growth-factor-expression-after-neoadjuvant-chemoradiation-in-patients-with-rectal-adenocarcinoma
#4
David Buka, Josef Dvorak, Veronika Sitorova, Igor Sirak, Rene Voboril, Bohuslav Melichar, Igor Richter
AIM OF THE STUDY: The aim was to examine the effects of neoadjuvant chemoradiotherapy on VEGF expression in patients with locally advanced rectal cancer. MATERIALS AND METHODS: A total of 53 patients with locally advanced rectal cancer were retrospectively studied. Neoadjuvant treatment comprised external beam radiation (50.4 Gy/28 fractions) with continuous infusion of 5-fluorouracil. Four to 6 weeks after the chemoradiotherapy, the patients underwent surgical resection...
2017: Contemporary Oncology Współczesna Onkologia
https://www.readbyqxmd.com/read/28435028/antagonistic-effects-of-p53-and-hif1a-on-microrna-34a-regulation-of-ppp1r11-and-stat3-and-hypoxia-induced-epithelial-to-mesenchymal-transition-in-colorectal-cancer-cells
#5
Huihui Li, Matjaz Rokavec, Longchang Jiang, David Horst, Heiko Hermeking
BACKGROUND & AIMS: In colorectal tumors, hypoxia causes resistance to therapy and promotes metastasis. Loss of the tumor suppressor p53 (encoded by TP53) provides cancer cells with a selective advantage under conditions of hypoxia, but little is known about the mediators of this effect. METHODS: Isogenic CRC cell lines with different TP53 genotypes were placed under conditions of hypoxia. We examined the effects on levels and activity of microRNA-34 a (MIR34A) in CRC cells...
April 20, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28433985/lingual-hyperpigmentation-after-5-fluorouracil-chemotherapy
#6
Michael Lawrenz Co, Marcus Juan Esteban
No abstract text is available yet for this article.
April 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28433634/dual-sphingosine-kinase-inhibitor-ski-ii-enhances-sensitivity-to-5-fluorouracil-in-hepatocellular-carcinoma-cells-via-suppression-of-osteopontin-and-fak-igf-1r-signalling
#7
Petra Grbčić, Ivana Tomljanović, Marko Klobučar, Sandra Kraljević Pavelić, Ksenija Lučin, Mirela Sedić
Hepatocellular carcinoma (HCC) represents the third leading cause of cancer-related deaths globally. Although 5-Fluorouracil (5-FU) is used as the first choice treatment for advanced HCC, it exerts poor efficacy and is associated with acquired and intrinsic resistance. Sphingosine kinases (Sphk) 1 and 2 play tumour-promoting roles in different cancer types including HCC and thus represent promising pharmacological targets. In the present study, we have investigated for the first time the anticancer efficacy and underlying molecular mechanisms of combined administration of 5-FU and dual Sphk1/Sphk2 inhibitor SKI-II (4-[[4-(4-chlorophenyl)-1,3-thiazol-2-yl]amino]phenol) in HepG2 hepatocellular carcinoma cells...
April 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28433602/folfoxiri-regimen-for-metastatic-colorectal-cancer-a-systematic-review-and-meta-analysis
#8
Frederico Leal, Fernanda Proa Ferreira, Andre Deeke Sasse
INTRODUCTION: Cytotoxic chemotherapy is the mainstay treatment for metastatic colorectal cancer (mCRC). Fluoropyrimidines, oxaliplatin, and irinotecan are the most active drugs; however, their optimal sequencing has not yet been established. Some evidence has shown that upfront treatment with 5-fluorouracil, oxaliplatin, and irinotecan (FOLFOXIRI regimen) can improve outcomes for patients with mCRC. MATERIALS AND METHODS: We performed a systematic search in electronic databases...
March 24, 2017: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/28433600/hepatic-arterial-infusion-chemotherapy-for-unresectable-liver-metastases-of-colorectal-cancer-a-multicenter-retrospective-study
#9
REVIEW
Annie Lim, Samuel Le Sourd, Hélène Senellart, Dominique Luet, Frédéric Douane, Christophe Perret, Antoine Bouvier, Sylvie Métairie, Estelle Cauchin, Philippe Rougier, Tamara Matysiak-Budnik, Yann Touchefeu
Hepatic arterial infusion chemotherapy (HAIC) is a treatment used for liver metastases (LM) of colorectal cancer (CRC). Because of its technical conditions, it has been used in only a few experienced centers in France. Our aim was to evaluate its feasibility, efficacy and tolerance in 4 centers. Clinical, biological, and radiological data of patients treated with HAIC for unresectable LM from CRC in 4 institutions from October 2011 to January 2016 were retrospectively analyzed. Sixty-one patients with unresectable LM from CRC were included...
March 14, 2017: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/28432271/knockdown-of-prdx2-sensitizes-colon-cancer-cells-to-5-fu-by-suppressing-the-pi3k-akt-signaling-pathway
#10
Jun Xu, Shouru Zhang, Rong Wang, Xingye Wu, Li Zeng, Zhongxue Fu
Although, 5-Fluorouracil (5-FU) remains widely used in adjuvant therapy in patients with colon cancer, resistance to 5-FU-based chemotherapy is an important reason for treatment failure. Recent studies have reported that an enhanced reactive oxygen species (ROS) scavenging system shows drug resistance to 5-FU. Peroxiredoxin-2 (PRDX2), is an important member of the ROS scavenging system, and may be a potential target that promotes chemosensitivity to 5-FU in colon cancer. Here, we depleted PRDX2 by PRDX2-shRNA-LV transduction in two colon cancer cell lines and found that in vitro PRDX2 knockdown facilitates cell death and apoptosis in 5-FU-treated colon cancer cells...
April 21, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28431950/postoperative-adjuvant-chemotherapy-is-associated-with-a-lower-incidence-of-colorectal-adenomas-in-patients-with-previous-colorectal-cancer
#11
Hee Seung Lee, Sung Bae Kim, Hyun Jung Lee, Soo Jung Park, Sung Pil Hong, Jae Hee Cheon, Won Ho Kim, Tae Il Kim
BACKGROUND AND AIMS: The effects of chemotherapeutic agents on the development of colorectal adenomas in patients with previous colorectal cancer (CRC) are not defined. Therefore, we evaluated the potential effect of adjuvant chemotherapy on the incidence of colorectal adenomas in patients with previous CRC. METHODS: We selected patients with low-risk stage II CRC with or without postoperative 5-fluorouracil-based adjuvant chemotherapy to reduce selection bias. Among 1808 patients with stage II CRC who underwent colonoscopic surveillance after curative resection of CRC between 2006 and 2013, 192 patients were retrospectively enrolled in this study after matching for age and sex...
April 18, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28431942/chitosan-based-nanocomplexes-for-simultaneous-loading-burst-reduction-and-controlled-release-of-doxorubicin-and-5-fluorouracil
#12
Antonio Di Martino, Pavel Kucharczyk, Zdenka Capakova, Petr Humpolicek, Vladimir Sedlarik
In this work, nanocomplexes based on chitosan grafted by carboxy-modified polylactic acid (SPLA) were prepared with the aim of loading simultaneously two anticancer drugs - doxorubicin and 5-fluorouracil, as well as to control their release, reduce the initial burst and boost cytotoxicity. The SPLA was prepared by a polycondensation reaction, using pentetic acid as the core molecule, and linked to the chitosan backbone through a coupling reaction. Nanocomplexes loaded with both drugs were formulated by the polyelectrolyte complexation method...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431329/stealth-recombinant-human-serum-albumin-nanoparticles-conjugating-5-fluorouracil-augmented-drug-delivery-and-cytotoxicity-in-human-colon-cancer-ht-29-cells
#13
Ankita Sharma, Amanpreet Kaur, Upendra Kumar Jain, Ramesh Chandra, Jitender Madan
BACKGROUND AND OBJECTIVE: 5-Fluorouracil (5-FU) is a first-line chemotherapeutic drug in colorectal cancer. However, intravenous administration of 5-FU at the dose of 7-12mg/kg exhibits curbs like short half-life (20min) and toxic side-effects on bone marrow cells. Therefore, in present investigation, 5-FU was conjugated to poly (ethylene glycol) anchored recombinant human serum albumin nanoparticles (5-FU-rHSA-PEG-NPs) to improve the pharmacokinetic and therapeutic profiles. METHODS AND RESULTS: The mean particle size of 5-FU-rHSA-NPs was measured to be 44...
April 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28431244/bacterial-metabolism-affects-the-c-%C3%A2-elegans-response-to-cancer-chemotherapeutics
#14
Aurian P García-González, Ashlyn D Ritter, Shaleen Shrestha, Erik C Andersen, L Safak Yilmaz, Albertha J M Walhout
The human microbiota greatly affects physiology and disease; however, the contribution of bacteria to the response to chemotherapeutic drugs remains poorly understood. Caenorhabditis elegans and its bacterial diet provide a powerful system to study host-bacteria interactions. Here, we use this system to study how bacteria affect the C. elegans response to chemotherapeutics. We find that different bacterial species can increase the response to one drug yet decrease the effect of another. We perform genetic screens in two bacterial species using three chemotherapeutic drugs: 5-fluorouracil (5-FU), 5-fluoro-2'-deoxyuridine (FUDR), and camptothecin (CPT)...
April 20, 2017: Cell
https://www.readbyqxmd.com/read/28431119/survival-benefit-of-adding-docetaxel-cisplatin-and-5-fluorouracil-induction-chemotherapy-to-concurrent-chemoradiotherapy-for-locally-advanced-nasopharyngeal-carcinoma-with-nodal-stage-n2-3
#15
Masahiro Kawahira, Tomoya Yokota, Satoshi Hamauchi, Yusuke Onozawa, Hirofumi Ogawa, Tsuyoshi Onoe, Tomoyuki Kamijo, Yoshiyuki Iida, Tetsuo Nishimura, Tetsuro Onitsuka, Hirofumi Yasui
Background: Concurrent chemoradiotherapy followed by adjuvant chemotherapy (CCRT-AC) has been established as the standard of care in locally advanced nasopharyngeal carcinoma (LA-NPC). The survival benefit of induction chemotherapy (ICT) for LA-NPC remains controversial. We analyzed the efficacy and feasibility of docetaxel, cisplatin and 5-fluorouracil (TPF) ICT followed by CCRT for LA-NPC with nodal Stage N2-3. Methods: We performed a retrospective analysis of 28 LA-NPC patients with nodal Stage N2-3 receiving induction TPF followed by CCRT (TPF group; n = 12) or CCRT-AC (CCRT group; n = 16) between October 2006 and May 2016...
April 20, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28429680/the-inhibitory-effects-of-hydamtiq-a-novel-parp-inhibitor-on-growth-in-human-tumor-cell-lines-with-defective-dna-damage-response-pathways
#16
Enrico Mini, Ida Landini, Laura Lucarini, Andrea Lapucci, Cristina Napoli, Gabriele Perrone, Renato Tassi, Emanuela Masini, Flavio Moroni, Stefania Nobili
The poly(ADP-ribose) polymerase (PARP) enzymes play key roles in the regulation of cellular processes (e.g. DNA damagerepair, genomic stability). It has been shown that PARP inhibitors (PARPIs) are selectively cytotoxic against cells with dysfunctions in genes involved in DNA repair mechanisms (synthetic lethality). Drug induced PARP inhibition potentiates the activity of anticancer drugs such as 5-fluorouracil in enhancing DNA damage, whose repair involves PARP1 activity.The aim of this study was to evaluate the growth inhibitory effects of a novel PARPI, HYDAMTIQ, on human tumor cell lines characterized by different features with regard to DNA damage response pathways (BRCA mutational status, microsatellite status and ATM expression level) and degree of sensitivity/resistance to 5-fluorouracil...
April 20, 2017: Oncology Research
https://www.readbyqxmd.com/read/28428709/disruption-of-the-tweak-fn14-pathway-prevents-5-fluorouracil-induced-diarrhea-in-mice
#17
Takuhito Sezaki, Yuki Hirata, Teruki Hagiwara, Yuki I Kawamura, Tadashi Okamura, Rieko Takanashi, Kenta Nakano, Miwa Tamura-Nakano, Linda C Burkly, Taeko Dohi
AIM: To clarify the roles of TWEAK and its receptor Fn14 in 5-fluorouracil (5-FU)-induced diarrhea. METHODS: Diarrhea was induced in wild-type (WT), Fn14 knockout (KO), and IL-13 receptor (IL-13R)α1 KO BALB/c mice using a single injection of 5-FU. Histological analysis, cytokine analysis, and flow cytometry was performed on ileal tissues and cells. Murine colon carcinoma-bearing mice were co-treated with an anti-TWEAK antibody and 5-FU. Embryonic fibroblast response to cytokines was also analyzed...
April 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28427757/involved-field-irradiation-concurrently-combined-with-nedaplatin-5-fluorouracil-for-inoperable-esophageal-cancer-on-basis-of-18fdg-pet-scans-a-long-follow-up-results-of-phase-ii-study
#18
Hideomi Yamashita, Osamu Abe, Keiichi Nakagawa
No abstract text is available yet for this article.
April 17, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28427503/oesophageal-cancer-which-treatment-is-the-easiest-to-swallow-a-review-of-combined-modality-treatments-for-resectable-carcinomas
#19
REVIEW
Bianca So, Loredana Marcu, Ian Olver, Raghu Gowda, Eva Bezak
Oesophageal cancer is a relatively uncommon malignancy, but with poor prognosis. Despite several treatment options that are available, the 5-year survival rates rarely exceed 40%. This review discusses the main challenges of oesophageal cancer, the available treatment options, and the most effective treatment in terms of overall survival. The outcomes of clinical trials show that neo-adjuvant chemo-radiotherapy using cisplatin and 5-fluorouracil followed by oesophagectomy results in the greatest survival. However, the optimal chemotherapy and radiotherapy schedule remains unclear...
May 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28427191/down-regulation-of-long-non-coding-rna-rp11-708h21-4-is-associated-with-poor-prognosis-for-colorectal-cancer-and-promotes-tumorigenesis-through-regulating-akt-mtor-pathway
#20
Longci Sun, Chunhui Jiang, Chunjie Xu, Hanbing Xue, Hong Zhou, Lei Gu, Ye Liu, Qing Xu
Long non-coding RNAs (lncRNAs) serve critical roles in cancer development and progression. Herein, through next generation RNA sequencing and experimental validations, we determined the expression status of RP11-708H21.4 in colorectal cancer (CRC) and explored its clinical significance and biological functions in CRC. Differentially expressed lncRNAs from CRC samples and corresponding normal mucosa tissues was screened through RNA sequencing, and RP11-708H21.4 was selected for further experimental validation...
March 2, 2017: Oncotarget
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