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https://www.readbyqxmd.com/read/29350549/abiraterone-acetate-and-its-use-in-the-treatment-of-metastatic-prostate-cancer-a-review
#1
Orazio Caffo, Antonello Veccia, Stefania Kinspergher, Francesca Maines
Abiraterone acetate, which targets enzymatic complexes playing a central role in steroidogenesis, demonstrated to increase survival significantly in both chemo-naive and docetaxel pretreated, becoming one of the drugs of choice for metastatic castration-resistant prostate cancer. More recently, this agent in combination to androgen deprivation therapy demonstrated to be efficacious also in metastatic castration-sensitive prostate cancer. The present review is aimed to outline the clinical development of abiraterone acetate, the pivotal trials which led to its approval for the clinical practice, new evidence about its efficacy in metastatic castration-sensitive prostate cancer, its place in the therapeutic landscape of prostate cancer and future directions of development...
January 19, 2018: Future Oncology
https://www.readbyqxmd.com/read/29350523/amphiphilic-%C3%AF-allyliridium-c-o-benzoates-enable-regio-and-enantioselective-amination-of-branched-allylic-acetates-bearing-linear-alkyl-groups
#2
Arismel Tena Meza, Thomas Wurm, Lewis Smith, Seung Wook Kim, Jason R Zbieg, Craig E Stivala, Michael J Krische
The first examples of amphiphilic reactivity in the context of enantioselective catalysis are described. Commercially available π-allyliridium C,O-benzoates, which are stable to air, water and SiO2 chromatography, and are well-known to catalyze allyl acetate-mediated carbonyl allylation, are now shown to catalyze highly chemo-, regio- and enantioselective substitutions of branched allylic acetates bearing linear alkyl groups with primary amines.
January 19, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29350041/chemo-regio-and-enantioselective-rhodium-catalyzed-allylation-of-triazoles-with-internal-alkynes-and-terminal-allenes
#3
Dino Berthold, Bernhard Breit
The rhodium-catalyzed asymmetric N1-selective and regioselective coupling of triazole derivatives with internal alkynes and terminal allenes gives access to secondary and tertiary allylic triazoles in very good enantioselectivities. For this process, three new members of the JosPOphos ligand family have been prepared and employed in catalysis. The optimized reaction conditions enable the coupling of triazoles with internal alkynes as well as with allenes, displaying a high tolerance for functional groups. A gram scale reaction provided N1-allyltriazole, which was subjected to various transformations highlighting synthetic utility...
January 19, 2018: Organic Letters
https://www.readbyqxmd.com/read/29349917/risk-stratification-for-febrile-neutropenia-in-patients-with-testicular-germ-cell-tumors
#4
Angelika Terbuch, Florian Posch, Richard Partl, Brigitte Zurl, Thomas Bauernhofer, Martin Pichler, Joanna Szkandera, Georg C Hutterer, Karl Pummer, Karin S Kapp, Herbert Stöger, Armin Gerger, Michael Stotz
The aim of this study was to detect risk factors for febrile neutropenia (FN) in patients with testicular germ cell tumors (TGCT). In this retrospective cohort study at the Medical University of Graz, we included 413 consecutive TGCT patients who received adjuvant or curative treatment with cisplatin-based chemotherapy. FN occurred in 70 (16.9%) of 413 patients. In univariable logistic regression, higher age (odds ratio (OR) per 5 years = 1.17, 95% CI: 1.02-1.35, P = 0.022), reduced performance status (PS) (OR = 2...
January 19, 2018: Cancer Medicine
https://www.readbyqxmd.com/read/29348875/radiosensitization-of-the-pi3k-inhibitor-hs-173-through-reduction-of-dna-damage-repair-in-pancreatic-cancer
#5
Jung Hee Park, Kyung Hee Jung, Soo Jung Kim, Zhenghuan Fang, Hong Hua Yan, Mi Kwon Son, Juyoung Kim, Yeo Wool Kang, Ji Eun Lee, Boreum Han, Joo Han Lim, Soon-Sun Hong
Activation of PI3K/AKT pathway occurs frequently in tumors and is correlated with radioresistance. The PI3K/AKT pathway can be an important target for improvement of radiotherapy. Although adding of chemotherapy to radiation therapy regimen enhances survival in patients with locally advanced pancreatic cancer, more effective therapies for increasing radiosensitivity are urgently needed. In this study, we investigated whether the novel PI3K inhibitor HS-173 could attenuate radiation-induced up-regulation of DNA damage repair processes and assessed its efficacy as a radio- and chemo-sensitizer...
December 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29348806/therapeutic-nanosystem-consisting-of-singlet-oxygen-responsive-prodrug-and-photosensitizer-excited-by-two-photon-light
#6
Yi Lin, Xiao-Fang Jiang, Xiangyan Duan, Fang Zeng, Bo Wu, Shuizhu Wu
Using light as the sole stimulus and employing the generated singlet oxygen as a therapeutic agent and the trigger to activate chemo-drug release could serve as an elegant way to bring into full play the advantageous features of light and enhance therapeutic efficacy through a combination of chemotherapy and photodynamic therapy. Herein a liposomal drug system has been developed by embedding a fluorescent photosensitizer and a prodrug into phospholipid vesicles. Upon one- or two-photon light irradiation, the photosensitizer generates singlet oxygen, which removes the protecting group of the prodrug and subsequently causes the release of the active drug chlorambucil...
January 11, 2018: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29348517/ndrg2-contributes-to-cisplatin-sensitivity-through-modulation-of-bak-to-mcl-1-ratio
#7
Soojong Park, Sang-Seok Oh, Ki Won Lee, Yeon-Kyeong Lee, Nae Yu Kim, Joo Heon Kim, Jiyun Yoo, Kwang Dong Kim
The downregulation of N-Myc downstream-regulated gene 2 (NDRG2) is known to be associated with the progression and poor prognosis of several cancers. Sensitivity to anti-cancer may be associated with a good prognosis in cancer patients, and NDRG2, which is induced by p53, sensitizes the cells to chemotherapy. However, the unique function of NDRG2 as an inducer of apoptosis under chemotreatment has not been sufficiently studied. In this study, we investigated the role of NDRG2 in chemo-sensitivity, focusing on cisplatin in U937 histiocytic lymphoma, which has the loss-of-functional mutation in p53...
January 18, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29348387/cancer-stem-cells-and-molecular-biology-test-in-colorectal-cancer-therapeutic-implications
#8
Rustam Effendi-Ys
Colorectal cancer (CRC) is the third most frequent cancer in males, the second in females, and is the second leading cause of cancer related death worldwide. Within Indonesia's 250 million population, the incidence rates for CRC per 100,000 population were 15.2 for males and 10.2 for females, and estimated 63,500 cases per year.  More than 50% of colorectal cancer patients will develop metastasis. CRC is still the main cause of tumor-related death, and although most CRC patients are treated with surgery to remove the tumor tissue, some of the CRC patients recurred...
October 2017: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/29346736/light-activatable-red-blood-cell-membrane-camouflaged-dimeric-prodrug-nanoparticles-for-synergistic-photodynamic-chemotherapy
#9
Qing Pei, Xiuli Hu, Xiaohua Zheng, Shi Liu, Yawei Li, Xiabin Jing, Zhigang Xie
Biomimetic approach offers numerous opportunities to design therapeutic platforms with enhanced antitumor performance and biocompatibility. Herein we report a novel red blood cell membrane-camouflaged nanoparticle (RBC(M(TPC-PTX))) for synergistic chemo- and photodynamic therapy (PDT). Specifically, the inner core is mainly constructed by reactive oxygen species (ROS)-responsive PTX dimer (PTX2-TK) and photosensitizer 5,10,15,20-tetraphenylchlorin (TPC). In vitro experiments show that the prepared RBC(M(TPC-PTX)) is readily taken up into endosomes...
January 18, 2018: ACS Nano
https://www.readbyqxmd.com/read/29345572/breaking-the-dna-damage-response-via-serine-threonine-kinase-inhibitors-to-improve-cancer-treatment
#10
Wioletta Rozpedek, Dariusz Pytel, Alicja Nowak-Zdunczyk, Dawid Lewko, Radoslaw Wojtczak, John Alan Diehl, Ireneusz Majsterek
Multiple, both endogenous and exogenous, sources may induce DNA damage and DNA replication stress. Cells have developed DNA damage response (DDR) signaling pathways to maintain genomic stability and effectively detect and repair DNA lesions. Serine/threonine kinases such as Ataxia-telangiectasia mutated (ATM) and Ataxia-telangiectasia and Rad3-Related (ATR) are the major regulators of DDR, since after sensing stalled DNA replication forks, DNA double- or single-strand breaks, may directly phosphorylate and activate their downstream targets, that play a key role in DNA repair, cell cycle arrest and apoptotic cell death...
January 16, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29345285/the-epitranscriptome-m6a-writer-mettl3-promotes-chemo-and-radioresistance-in-pancreatic-cancer-cells
#11
Kosuke Taketo, Masamitsu Konno, Ayumu Asai, Jun Koseki, Masayasu Toratani, Taroh Satoh, Yuichiro Doki, Masaki Mori, Hideshi Ishii, Kazuhiko Ogawa
N6-methyladenosine (m6A) is the most abundant epitranscriptome modification in mammalian mRNA. Recent years have seen substantial progress in m6A epitranscriptomics, indicating its crucial roles in the initiation and progression of cancer through regulation of RNA stabilities, mRNA splicing, microRNA processing and mRNA translation. However, by what means m6A is dynamically regulated or written by enzymatic components represented by methyltransferase-like 3 (METTL3) and how m6A is significant for each of the numerous genes remain unclear...
February 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29344297/mesoporous-carbon-nanospheres-as-a-multifunctional-carrier-for-cancer-theranostics
#12
Libo Zhou, Ying Jing, Yubin Liu, Zhihe Liu, Duyang Gao, Haobin Chen, Weiye Song, Tao Wang, Xiaofeng Fang, Weiping Qin, Zhen Yuan, Sheng Dai, Zhen-An Qiao, Changfeng Wu
Optical nanomaterials with intense absorption in near-infrared (NIR) region hold great promise for biomedical applications such as photothermal therapy (PTT) and photoacoustic imaging (PAI). In this work, we report mesoporous carbon nanospheres (Meso-CNs) with broadband and intense absorption in the UV-Vis-NIR region (300-1400 nm) and explore their potential as a multifunctional platform for photoacoustic imaging and chemo-photothermal therapy. Methods: Meso-CNs were prepared by a "silica-assisted" synthesis strategy and characterized by transmission electron microscope and optical spectroscopy...
2018: Theranostics
https://www.readbyqxmd.com/read/29344114/hnf-4%C3%AE-promotes-multidrug-resistance-of-gastric-cancer-cells-through-the-modulation-of-cell-apoptosis
#13
Yubo Ma, Xufu Wei, Zhongjun Wu
Multidrug resistance (MDR) typically leads to treatment failure, and is associated with disease progression of gastric cancer (GC). In the present study, a total of 15 aberrantly activated transcription factors (TFs) were detected in chemo-resistant GC cells using a TF Activation Profiling Plate Array. Among these TFs, hepatocyte nuclear factor (HNF)-4α was significantly upregulated in multidrug-resistant GC cells (P=0.019). The overexpression of HNF-4α was able to cause resistance to multiple chemotherapeutics, whereas inhibition of HNF-4α appeared to reverse cancer cell resistance...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29341250/protectiveness-of-copper-water-quality-criteria-against-impairment-of-behavior-and-chemo-mechanosensory-responses-an-update
#14
REVIEW
Joseph S Meyer, David K DeForest
A meta-analysis was conducted of studies that reported behavior and chemo/mechanosensory responses by fish, amphibians, and aquatic invertebrates in Cu-containing waters and also reported sufficient water chemistry for calculation of hardness-based and biotic ligand model (BLM)-based water quality criteria (WQC) for Cu. The calculated WQC concentrations were then compared to the corresponding 20% impairment concentrations (IC20) of Cu for those behavior and chemo/mechanosensory responses. The hardness-based acute and chronic WQC for Cu would not have been protective (i...
January 17, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29341035/when-an-unexpected-diagnosis-occurs-a-vaginal-premenopausal-sarcoma
#15
Pedro Marcos-Figueiredo, Diana de Sousa da Costa Moreira, Manuel Gonçalves Morim, Júlia Leite Pereira, Lurdes Silva Salgado
Vaginal cancer is a rare entity. The evidence on its management resides mostly in clinical cases or small case series. Of the histological types, the most frequent is the squamous cell carcinoma, followed by adenocarcinoma. But what to do when identifying an even more infrequent sarcoma in a premenopausal woman? In this study, we describe the case of a 53-year-old woman presenting with metrorrhagia for two months, who was evaluated after an intense episode. A necrotic and ulcerative vaginal swelling was documented and then submitted to biopsy, which revealed a vaginal sarcoma...
January 2018: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/29340771/predictive-factors-for-pharyngocutaneous-fistulization-after-total-laryngectomy-a-dutch-head-and-neck-society-audit
#16
Liset Lansaat, Vincent van der Noort, Simone E Bernard, Simone E J Eerenstein, Boudewijn E C Plaat, Ton A P M Langeveld, Martin Lacko, Frans J M Hilgers, Remco de Bree, Robert P Takes, Michiel W M van den Brekel
BACKGROUND: Incidences of pharyngocutaneous fistulization (PCF) after total laryngectomy (TL) reported in the literature vary widely, ranging from 2.6 to 65.5%. Comparison between different centers might identify risk factors, but also might enable improvements in quality of care. To enable this on a national level, an audit in the 8 principle Dutch Head and Neck Centers (DHNC) was initiated. METHODS: A retrospective chart review of all 324 patients undergoing laryngectomy in a 2-year (2012 and 2013) period was performed...
January 16, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29340100/the-inhibition-of-cordycepin-on-cancer-stemness-in-tgf-beta-induced-chemo-resistant-ovarian-cancer-cell
#17
Chia-Woei Wang, Bao-Hong Lee, Chen-Jei Tai
Chemotherapy is one of the main approach for ovarian cancer. Cancer stem cells (CSCs) escape chemotherapy and lead to chemoresistance. We previously demonstrated that cordycepin (Cd) inhibited metastasis in human ovarian carcinoma cells, the aim of this study is to investigate the effects of Cd on ovarian cancer stemness. TGF-beta was used to induce chemoresistance of chemotherapeutic agent cisplatin in SKOV-3 ovarian cancer cells. After treating with 100 μM of Cd, cell viability, the percentage of cancer stem cells, and the levels of matrix metalloproteinases (MMPs) were decreased in TGF-beta-induced SKOV-3 cells...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29340097/s-adenosyl-methionine-sam-alters-the-transcriptome-and-methylome-and-specifically-blocks-growth-and-invasiveness-of-liver-cancer-cells
#18
Yan Wang, ZhongSheng Sun, Moshe Szyf
S-adenosyl methionine (SAM) is a ubiquitous methyl donor that was reported to have chemo- protective activity against liver cancer, however the molecular footprint of SAM is unknown. We show here that SAM selectively inhibits growth, transformation and invasiveness of hepatocellular carcinoma cell lines but not normal primary liver cells. Analysis of the transcriptome of SAM treated and untreated liver cancer cell lines HepG2 and SKhep1 and primary liver cells reveals pathways involved in cancer and metastasis that are upregulated in cancer cells and are downregulated by SAM...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29340028/high-resolution-microbiome-profiling-uncovers-fusobacterium-nucleatum-lactobacillus-gasseri-johnsonii-and-lactobacillus-vaginalis-associated-to-oral-and-oropharyngeal-cancer-in-saliva-from-hpv-positive-and-hpv-negative-patients-treated-with-surgery-and-chemo
#19
Rafael Guerrero-Preston, James Robert White, Filipa Godoy-Vitorino, Arnold Rodríguez-Hilario, Kelvin Navarro, Herminio González, Christina Michailidi, Anne Jedlicka, Sierra Canapp, Jessica Bondy, Amanda Dziedzic, Barbara Mora-Lagos, Gustavo Rivera-Alvarez, Carmen Ili-Gangas, Priscilla Brebi-Mieville, William Westra, Wayne Koch, Hyunseok Kang, Luigi Marchionni, Young Kim, David Sidransky
Microbiome studies show altered microbiota in head and neck squamous cell carcinoma (HNSCC), both in terms of taxonomic composition and metabolic capacity. These studies utilized a traditional bioinformatics methodology, which allows for accurate taxonomic assignment down to the genus level, but cannot accurately resolve species level membership. We applied Resphera Insight, a high-resolution methodology for 16S rRNA taxonomic assignment that is able to provide species-level context in its assignments of 16S rRNA next generation sequencing (NGS) data...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339439/idh1-2-mutations-sensitize-acute-myeloid-leukemia-to-parp-inhibition-and-this-is-reversed-by-idh1-2-mutant-inhibitors
#20
Remco J Molenaar, Tomas Radivoyevitch, Yasunobu Nagata, Mohammed Khurshed, Bartlomiej Przychodzen, Hideki Makishima, Mingjiang Xu, Fonnet E Bleeker, Johanna W Wilmink, Hetty Carraway, Sudipto Mukherjee, Mikkael A Sekeres, Cornelis J F Van Noorden, Jaroslaw P Maciejewski
PURPOSE: Somatic mutations in IDH1/2 occur in ~20% of patients with myeloid neoplasms, including acute myeloid leukemia (AML). IDH1/2MUT enzymes produce D-2-hydroxyglutarate (D2HG), which associates with increases in DNA damage and improved responses to chemo/radiotherapy and PARP inhibitors in solid tumor cells. Whether this also holds true for IDH1/2MUT AML is not known. EXPERIMENTAL DESIGN: Well-characterized primary IDH1MUT, IDH2MUT and IDH1/2WT AML cells were analyzed for DNA damage and responses to daunorubicin, ionizing radiation and PARP inhibitors...
January 16, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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