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https://www.readbyqxmd.com/read/29149663/%C3%AE-keto-tetrahydrofuran-lignan-glucosides-from-the-bangladeshi-medicinal-plant-terminalia-citrina-inhibit-estradiol-e2-induced-proliferation-in-cancer-cells
#1
Md Abdul Muhit, Kaoru Umehara, Hiroshi Noguchi
EtOAc extract from the leaves of Terminalia citrina collected in Bangladesh were separated, and seven previously undescribed α-keto tetrahydrofuran lignan glucosides (terminalosides Q to W) were isolated and characterized. NOESY analysis of (1)H NMR spectra and ECD spectroscopic data analysis revealed the absolute stereochemistry of the tetrahydrofuran ring of the isolated constituents as being a (7S,8R,8'S)- configuration in terminalosides Q to U and a (7R,8R,8'S)- configuration in terminalosides V and W...
November 14, 2017: Phytochemistry
https://www.readbyqxmd.com/read/29149600/repair-of-uv-induced-dna-damage-independent-of-nucleotide-excision-repair-is-masked-by-mutyh
#2
Abdelghani Mazouzi, Federica Battistini, Sarah C Moser, Joana Ferreira da Silva, Marc Wiedner, Michel Owusu, Charles-Hugues Lardeau, Anna Ringler, Beatrix Weil, Jürgen Neesen, Modesto Orozco, Stefan Kubicek, Joanna I Loizou
DNA lesions caused by UV damage are thought to be repaired solely by the nucleotide excision repair (NER) pathway in human cells. Patients carrying mutations within genes functioning in this pathway display a range of pathologies, including an increased susceptibility to cancer, premature aging, and neurological defects. There are currently no curative therapies available. Here we performed a high-throughput chemical screen for agents that could alleviate the cellular sensitivity of NER-deficient cells to UV-induced DNA damage...
November 16, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29149589/bond-with-me-if-you-can-natural-product-covalent-ligand-and-reactivity-based-probe-compete-for-cysteine-in-pp2a-complex
#3
Douglas S Johnson, Jaimeen D Majmudar
In this issue of Cell Chemical Biology, Grossman et al. (2017) disclose a chemoproteomics-enabled strategy to identify the cysteine-reactive target(s) of the anti-cancer natural product withaferin A and then screen a cysteine-reactive fragment library to discover a covalent ligand for the same target.
November 16, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/29149434/enhancement-of-therapeutic-dna-vaccine-potency-by-melatonin-through-inhibiting-vegf-expression-and-induction-of-antitumor-immunity-mediated-by-cd8-t-cells
#4
Sanaz Baghban Rahimi, Alireza Mohebbi, Gelareh Vakilzadeh, Peyvand Biglari, Soodeh Razeghi Jahromi, Seyed Reza Mohebi, Sadegh Shirian, Ali Gorji, Amir Ghaemi
To be effective, therapeutic cancer vaccines should stimulate both an effective cell-mediated and a robust cytotoxic CD8+ T-cell response against human papillomavirus (HPV)-infected cells to treat the pre-existing tumors and prevent potential future tumors. In this study, the therapeutic experiments were designed in order to evaluate antitumor effect against the syngeneic TC-1 tumor model. The anti-tumor efficacy of a HPV-16 E7 DNA vaccine adjuvanted with melatonin (MLT) was evaluated in a C57BL/6 mouse tumor model by measuring tumor growth post vaccination and the survival rate of tumor-bearing mice, analyzing the specific lymphocyte proliferation responses in control and vaccinated mice by MTT assay...
November 17, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29149426/relationship-between-lat1-expression-and-resistance-to-chemotherapy-in-pancreatic-ductal-adenocarcinoma
#5
Bolag Altan, Kyoichi Kaira, Akira Watanabe, Norio Kubo, Pinjie Bao, Gantumur Dolgormaa, Erkhem-Ochir Bilguun, Kenichiro Araki, Yoshikatsu Kanai, Takehiko Yokobori, Tetsunari Oyama, Masahiko Nishiyama, Hiroyuki Kuwano, Ken Shirabe
PURPOSE: L-type amino acid transporter 1 (LAT1) is linked to tumor cell proliferation, angiogenesis, and survival in various human cancers. Although the expression of LAT1 was identified as a significant prognostic predictor after surgery in patients with pancreatic ductal adenocarcinoma (PDAC), little is known about the clinical significance of LAT1 as a chemotherapeutic resistance factor in PDAC. METHODS: A total of 110 patients with surgically resected PDAC were retrospectively reviewed as the training set...
November 17, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/29149404/the-translational-controlled-tumour-protein-tctp-biological-functions-and-regulation
#6
Ulrich-Axel Bommer
The Translational Controlled Tumour Protein TCTP (gene symbol TPT1, also called P21, P23, Q23, fortilin or histamine-releasing factor, HRF) is a highly conserved protein present in essentially all eukaryotic organisms and involved in many fundamental cell biological and disease processes. It was first discovered about 35 years ago, and it took an extended period of time for its multiple functions to be revealed, and even today we do not yet fully understand all the details. Having witnessed most of this history, in this chapter, I give a brief overview and review the current knowledge on the structure, biological functions, disease involvements and cellular regulation of this protein...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/29149307/tumour-tif1-mutations-and-loss-of-heterozygosity-related-to-cancer-associated-myositis
#7
Iago Pinal-Fernandez, Berta Ferrer-Fabregas, Ernesto Trallero-Araguas, Eva Balada, Maria Angeles Martínez, Jose César Milisenda, Gloria Aparicio-Español, Moises Labrador-Horrillo, Vicente Garcia-Patos, Josep M Grau-Junyent, Albert Selva-O'Callaghan
Objectives: To analyse the influence of genetic alterations and differential expression of transcription intermediary factor 1 ( TIF1 ) genes in the pathophysiology of cancer-associated myositis (CAM). Methods: Paired blood and tumour DNA samples from patients with anti-TIF1γ-positive CAM and from controls were analysed by whole-exome sequencing for the presence of somatic mutations and loss of heterozygosity (LOH) in their TIF1 genes. The genesis and maintenance of the autoimmune process were investigated immunohistochemically by studying TIF1γ expression in the different tissues involved in CAM (skin, muscle and tumour) based on the immunohistochemical H-score...
November 14, 2017: Rheumatology
https://www.readbyqxmd.com/read/29148840/resveratrol-induces-mitochondrial-apoptosis-and-inhibits-epithelial-mesenchymal-transition-in-oral-squamous-cell-carcinoma-cells
#8
Seong-Eon Kim, Sang-Hun Shin, Jae-Yeol Lee, Chul-Hoon Kim, In-Kyo Chung, Hae-Mi Kang, Hae-Ryoun Park, Bong-Soo Park, In-Ryoung Kim
OSCC is the most common malignant cancer of the head and neck. EMT is an essential cellular process critical to the morphogenesis and homeostasis of solid tissues. It is also involved in the initial stage of cancer metastasis and invasion in which cells lose epithelial characteristics. While cancer therapy protocols such as surgery, radiation, and chemotherapy are effective and useful, the drug tolerance and toxicity of OSCC patients remain a problem. Resveratrol is mainly produced in red grape skin and exhibits anti-oxidative, anti-inflammatory, anti-proliferative, and anti-cancer properties...
November 17, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29148558/ultrasound-propelled-nanowire-motors-enhance-asparaginase-enzymatic-activity-against-cancer-cells
#9
Murat Uygun, Beatriz Jurado-Sánchez, Deniz Aktas Uygun, Virendra Vikram Singh, Liangfang Zhang, Joseph Wang
Ultrasound-(US) propelled nanowires consisting of Au/Ni/Au/PEDOT-PPy-COOH segments are modified with asparaginase enzyme and applied as an effective anti-cancer agent. After immobilization of asparaginase onto the surface of the nanowire motors, the enzyme displays enhanced thermal and pH stabilities, improved resistance towards protease, and higher affinity for the substrate. The fast motion of the motor-carrying asparaginase leads to greatly accelerated biocatalytic depletion of asparagine and hence to a significantly enhanced inhibition efficacy against El4 lymphoma cancer cells (92%) as compared to free enzyme counterpart (17%) and other control groups...
November 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/29148169/antitumor-and-anti-metastatic-mechanisms-of-rhizoma-paridis-saponins-in-lewis-mice
#10
Shuli Man, Hongyan Chai, Jingxia Cui, Jingwen Yao, Long Ma, Wenyuan Gao
Lung cancer is one of the most common causes of death in the world. Rhizoma paridis saponins (RPS) have been found to show inhibition of pulmonary adenoma in previous research. However, the detailed mechanisms of RPS from a holistic view have not been established. In this study, Lewis pulmonary adenoma mice were successfully established to analyze the pathways involved in RPS intervening tumor formation and progression. As a result, RPS inhibited levels of cytokines or receptors such as VEGFD, VEGFR3, RAGE, IL6R, IL17BR, and CXCL16 which were regarded as the initiators induced tumor cell proliferation, adhesion, angiogenesis, and invasion...
November 17, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/29147947/biocompatibility-of-vertically-aligned-multi-walled-carbon-nanotube-scaffolds-for-human-breast-cancer-cell-line-mda-mb-231
#11
E M Akinoglu, K Ozbilgin, P Kilicaslan Sonmez, M M Ozkut, M Giersig, S Inan, E Gumustepe, C Kurtman
The aim of the current study was to determine whether the MWCNT-based scaffold has a suitable structure for cell growth and provides a biocompatible environment for human MDA-MB-231 cell lines. MWCNT-based nanostructured scaffolds were produced by plasma-enhanced chemical vapor deposition (PECVD) technique. MDA-MB-231 cells were seeded on MWCNTs-textured silicon scaffolds and on pristine silicon surfaces. After 1 week of culturing, the scaffolds were prepared for SEM analysis and immunocytochemical staining was performed for the two groups (MWCNT scaffold and pristine silicon surface), using MMP-2, MMP-9, PI3K, AKT and NF-κB primary antibodies...
November 16, 2017: Progress in biomaterials
https://www.readbyqxmd.com/read/29147875/evaluation-of-nfsa-like-nitroreductases-from-neisseria-meningitidis-and-bartonella-henselae-for-enzyme-prodrug-therapy-targeted-cellular-ablation-and-dinitrotoluene-bioremediation
#12
Michelle H Rich, Abigail V Sharrock, Kelsi R Hall, David F Ackerley, Joanna K MacKichan
OBJECTIVES: To characterize the activities of two candidate nitroreductases, Neisseria meningitidis NfsA (NfsA_Nm) and Bartonella henselae (PnbA_Bh), with the nitro-prodrugs, CB1954 and metronidazole, and the environmental pollutants 2,4- and 2,6-dinitrotoluene. RESULTS: NfsA_Nm and PnbA_Bh were evaluated in Escherichia coli over-expression assays and as His6-tagged proteins in vitro. With the anti-cancer prodrug CB1954, both enzymes were more effective than the canonical O2-insensitive nitroreductase E...
November 17, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/29147712/a-biocompatible-betaine-functionalized-polycation-for-coacervation
#13
Mintai P Hwang, Xiaochu Ding, Jin Gao, Abhinav P Acharya, Steven R Little, Yadong Wang
The aqueous nature of complex coacervates provides a biologically-relevant context for various therapeutic applications. In this sense, biological applications demand a corresponding level of biocompatibility from the polyelectrolytes that participate in complex coacervation. Continued development with naturally-occurring polyelectrolytes such as heparin and chitosan underscore such aims. Herein, we design a synthetic polycation, in which betaine is conjugated to a biodegradable polyester backbone. Betaine is a naturally-occurring methylated amino acid that is ubiquitously present in human plasma...
November 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/29147627/stat1-gene-deficient-mice-develop-accelerated-breast-cancer-growth-and-metastasis-which-is-reduced-by-il-17-blockade
#14
Sanjay Varikuti, Steve Oghumu, Mohamad Elbaz, Greta Volpedo, Dinesh K Ahirwar, Pablo C Alarcon, Rachel H Sperling, Ellen Moretti, Marissa S Pioso, Jennifer Kimble, Mohd W Nasser, Ramesh K Ganju, Cesar Terrazas, Abhay R Satoskar
Signal transducer and activator of transcription 1 (STAT1) mediates interferon gamma signaling which activates the expression of various genes related to apoptosis, inflammation, cell cycle and angiogenesis. Several experimental and clinical studies have investigated the role of STAT1 in primary tumor growth in breast cancer; however, its role in tumor metastasis remains to be determined. To determine the role of STAT1 in breast cancer metastasis, we analyzed growth and metastasis in WT or STAT1(-/-) mice orthotopically implanted with metastatic 4T1...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29147618/programmed-cell-death-ligands-expression-in-phaeochromocytomas-and-paragangliomas-relationship-with-the-hypoxic-response-immune-evasion-and-malignant-behavior
#15
David J Pinato, James R Black, Sebastian Trousil, Roberto E Dina, Pritesh Trivedi, Francesco A Mauri, Rohini Sharma
The hypoxic response underlies the pathogenesis and malignant behavior of PCC/PGL. Regulation of PD-1 receptor-ligand signaling, a therapeutically actionable driver of the anti-tumor immune response, is a hypoxic-driven trait across malignancies. We evaluated the prognostic role of PD ligands in association with biomarkers of hypoxia and angiogenesis in patients with PCC/PGL. Tissue microarrays sections including consecutive cases diagnosed between 1983-2011 were stained for PD-L1 and 2, hypoxia inducible factor 1a (Hif-1a), Carbonic Anhydrase IX (CaIX), Vascular Endothelial Growth Factor-A (VEGF-A)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29147615/tumor-associated-neutrophils-induce-apoptosis-of-non-activated-cd8-t-cells-in-a-tnf%C3%AE-and-no-dependent-mechanism-promoting-a-tumor-supportive-environment
#16
Janna Michaeli, Merav E Shaul, Inbal Mishalian, Avi-Hai Hovav, Liran Levy, Lidia Zolotriov, Zvi Granot, Zvi G Fridlender
The role of neutrophils in tumor progression has become in recent years a subject of growing interest. Tumor-associated neutrophils (TANs), which constitute an important portion of the tumor microenvironment, promote immunosuppression in advanced tumors by modulating the proliferation, activation and recruitment of a variety of immune cell types. Studies which investigated the consequences of manipulating TAN polarization suggest that the impact of these neutrophils on tumor progression is considerably mediated by and dependent on the presence of CD8 T-cells...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29147611/chloroquine-supplementation-increases-the-cytotoxic-effect-of-curcumin-against-her2-neu-overexpressing-breast-cancer-cells-in-vitro-and-in-vivo-in-nude-mice-while-counteracts-it-in-immune-competent-mice
#17
L Masuelli, M Granato, M Benvenuto, R Mattera, R Bernardini, M Mattei, G d'Amati, G D'Orazi, A Faggioni, R Bei, M Cirone
Autophagy is usually a pro-survival mechanism in cancer cells, especially in the course of chemotherapy, thus autophagy inhibition may enhance the chemotherapy-mediated anti-cancer effect. However, since autophagy is strongly involved in the immunogenicity of cell death by promoting ATP release, its inhibition may reduce the immune response against tumors, negatively influencing the overall outcome of chemotherapy. In this study, we evaluated the in vitro and in vivo anti-cancer effect of curcumin (CUR) against Her2/neu overexpressing breast cancer cells (TUBO) in the presence or in the absence of the autophagy inhibitor chloroquine (CQ)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29147609/tumor-immunology-meets%C3%A2-immunology-modified-cancer-cells-as-professional-apc-for-priming-na%C3%A3-ve-tumor-specific-cd4-t-cells
#18
REVIEW
Farah Bou Nasser Eddine, Elise Ramia, Giovanna Tosi, Greta Forlani, Roberto S Accolla
Although recent therapeutic approaches have revitalized the enthusiasm of the immunological way to combat cancer, still the comprehension of immunity against tumors is largely incomplete. Due to their specific function, CD8+ T cells with cytolytic activity (CTL) have attracted the attention of most investigators because CTL are considered the main effectors against tumor cells. Nevertheless, CTL activity and persistence is largely dependent on the action of CD4+ T helper cells (TH). Thus establishment of tumor-specific TH cell response is key to the optimal response against cancer...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29147605/egfr-mutation-correlates-with-uninflamed-phenotype-and-weak-immunogenicity-causing-impaired-response-to-pd-1-blockade-in-non-small-cell-lung-cancer
#19
Zhong-Yi Dong, Jia-Tao Zhang, Si-Yang Liu, Jian Su, Chao Zhang, Zhi Xie, Qing Zhou, Hai-Yan Tu, Chong-Rui Xu, Li-Xu Yan, Yu-Fa Li, Wen-Zhao Zhong, Yi-Long Wu
Patients with EGFR mutations showed unfavorable response to programmed cell death-1 (PD-1) blockade immunotherapy in non-small cell lung cancer (NSCLC). Yet the underlying association between EGFR mutation and immune resistance remains largely unclear. We performed an integrated analysis of PD-ligand 1(PD-L1)/CD8 expression and mutation profile based on the repository database and resected early-stage NSCLC in Guangdong Lung Cancer Institute (GLCI). Meanwhile, 2 pool-analyses were set to clarify the correlation between EGFR mutation and PD-L1 expression, and the association of EGFR status with response to anti-PD-1/L1 therapy...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29147604/tap1-down-regulation-elicits-immune-escape-and-poor-prognosis-in-colorectal-cancer
#20
Agnes Ling, Anna Löfgren-Burström, Pär Larsson, Xingru Li, Maria L Wikberg, Åke Öberg, Roger Stenling, Sofia Edin, Richard Palmqvist
The anti-tumor immune response has been shown to be of great prognostic importance in colorectal cancer (CRC) and so has the tumors ability for immune evasion. Our aim of this study was to investigate tumor factors that influence immunity. We used a gene expression array to search for potential mechanisms of tumor immune escape. One candidate gene identified was TAP1, involved in antigen presentation by MHC class I. TAP1 protein expression was evaluated by immunohistochemistry in 436 CRC patients of the Colorectal Cancer in Umeå Study cohort...
2017: Oncoimmunology
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