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https://www.readbyqxmd.com/read/28445155/retinoblastoma-cells-activate-the-akt-pathway-and-are-vulnerable-to-the-pi3k-mtor-inhibitor-nvp-bez235
#1
Chencheng Xie, Matthew J Freeman, Huarui Lu, Xiaohong Wang, Colleen L Forster, Aaron L Sarver, Timothy C Hallstrom
Retinoblastoma is a pediatric cancer of the retina most often caused by inactivation of the retinoblastoma (RB1) tumor suppressor gene. We previously showed that Rb1 loss cooperates with either co-activating the phosphatidylinositol 3-kinase (PI3K)/AKT pathway, or co-deleting Pten, to initiate retinoblastoma tumors in mice. The objectives of this study were to determine if the AKT pathway is activated in human retinoblastomas and the extent that anti-PI3K therapy induces apoptosis in retinoblastoma cells, alone or in combination with the DNA damaging drugs carboplatin and topotecan...
April 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28442256/functional-evaluation-of-synthetic-flavonoids-and-chalcones-for-potential-antiviral-and-anticancer-properties
#2
Nelly Mateeva, Suresh V K Eyunni, Kinfe K Redda, Ucheze Ononuju, Tony D Hansberry, Cecilia Aikens, Anita Nag
Flavonoids, stilbenes, and chalcones are plant secondary metabolites that often possess diverse biological activities including anti-inflammatory, anti-cancer, and anti-viral activities. The wide range of bioactivities poses a challenge to identify their targets. Here, we studied a set of synthetically generated flavonoids and chalcones to evaluate for their biological activity, and compared similarly substituted flavonoids and chalcones. Substituted chalcones, but not flavonoids, showed inhibition of viral translation without significantly affecting viral replication in cells infected with hepatitis C virus (HCV)...
April 13, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28433890/il-37-induces-autophagy-in-hepatocellular-carcinoma-cells-by-inhibiting-the-pi3k-akt-mtor-pathway
#3
Ting-Ting Li, Di Zhu, Tong Mou, Zhen Guo, Jun-Liang Pu, Qing-Song Chen, Xu-Fu Wei, Zhong-Jun Wu
Autophagy is an intracellular "self-eating" process that is closely related to inflammation and cellular immunity. New studies indicate that autophagy is also involved in tumor suppression. The anti-inflammatory cytokine interleukin-37 (IL-37) has been shown to have tumor-suppressive abilities in hepatocellular carcinoma (HCC). Notably, autophagy appears to play a dual role in the development of HCC and may be involved in both tumorigenesis and tumor suppression. However, the potential role of IL-37 in autophagy is currently unknown...
April 20, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28428059/the-decreased-growth-performance-and-impaired-immune-function-and-structural-integrity-by-dietary-iron-deficiency-or-excess-are-associated-with-tor-nf-%C3%AE%C2%BAb-p38mapk-nrf2-and-mlck-signaling-in-head-kidney-spleen-and-skin-of-grass-carp-ctenopharyngodon-idella
#4
Yan-Lin Guo, Wei-Dan Jiang, Pei Wu, Yang Liu, Xiao-Qiu Zhou, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Lin Feng
This study was conducted to investigate the effects of dietary iron on the growth, and immune function and structural integrity in head kidney, spleen and skin as well as the underlying signaling of young grass carp (Ctenopharyngodon idella). Total 630 grass carp (242.32 ± 0.58 g) were fed diets containing graded levels of iron at 12.15 (basal diet), 35.38, 63.47, 86.43, 111.09, 136.37 mg/kg (diets 2-6 were added with ferrous fumarate) and 73.50 mg/kg (diet 7 was added with ferrous sulfate) diet for 60 days...
April 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28420060/risk-factors-to-predict-the-development-of-chronic-kidney-disease-in-patients-with-lupus-nephritis
#5
D J Park, J H Kang, J W Lee, K E Lee, T J Kim, Y W Park, J S Lee, Y D Choi, S S Lee
Objectives We analyzed the clinical follow-up results of 88 lupus nephritis patients to find prognostic factors for the development of chronic kidney disease in ethnically homogeneous Korean patients with biopsy-proven lupus nephritis. Methods Sociodemographic, clinical, laboratory, and treatment-related data at the time of kidney biopsy and during follow-up were obtained. Renal biopsy specimens were reclassified according to the International Society of Pathology/Renal Pathology Society classification, separately, by two renal pathologists blinded to the previous classification...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28415756/human-melanoma-cells-resistant-to-mapk-inhibitors-can-be-effectively-targeted-by-inhibition-of-the-p90-ribosomal-s6-kinase
#6
Corinna Kosnopfel, Tobias Sinnberg, Birgit Sauer, Heike Niessner, Anja Schmitt, Elena Makino, Andrea Forschner, Stephan Hailfinger, Claus Garbe, Birgit Schittek
The clinical availability of small molecule inhibitors specifically targeting mutated BRAF marked a significant breakthrough in melanoma therapy. Despite a dramatic anti-tumour activity and improved patient survival, rapidly emerging resistance, however, greatly limits the clinical benefit. The majority of the already described resistance mechanisms involve a reactivation of the MAPK signalling pathway. The p90 ribosomal S6 kinase (RSK), a downstream effector of the MAPK signalling cascade, has been reported to enhance survival of melanoma cells in response to chemotherapy...
March 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414205/molecular-tumor-targeting-of-gelonin-by-fusion-with-f3-peptide
#7
Song-Hee Ham, Kyoung Ah Min, Meong Cheol Shin
Therapeutically potent macromolecular drugs have shown great promise for overcoming the limitations of small-molecule anti-cancer drugs. But tumor cell-selective intracellular delivery of the macromolecules remains a major hurdle for their successful clinical application. To overcome this challenge, we engineered a novel genetic fusion protein (F3-Gel) that composed of F3 peptide, a tumor-homing peptide, and gelonin, a plant-derived ribosome-inactivating protein (RIP), and then evaluated its anti-cancer activity in vitro and in vivo...
April 17, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28413468/antitumor-effect-of-sunitinib-in-human-prostate-cancer-cells-functions-via-autophagy
#8
Bangqi Wang, Dongyuan Lu, Min Xuan, Weilie Hu
The aim of the present study was to explore sunitinib-induced autophagic effects and the specific molecular mechanisms involved, in vitro, using PC-3 and LNCaP human prostate cancer cell lines. Cells were exposed to escalating doses of sunitinib treatment and subsequent cell viability and cell cycle analyses were performed to evaluate the inhibitory effect of sunitinib in vitro. Immunofluorescence staining of microtubule associated protein 1A/1B-light chain 3 (LC3) puncta was employed to assess autophagy levels after sunitinib treatment...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28412369/structural-basis-for-ribosome-protein-s1-interaction-with-rna-in-trans-translation-of-mycobacterium-tuberculosis
#9
Yi Fan, Yazhuang Dai, Meijing Hou, Huilin Wang, Hongwei Yao, Chenyun Guo, Donghai Lin, Xinli Liao
Ribosomal protein S1 (RpsA), the largest 30S protein in ribosome, plays a significant role in translation and trans-translation. In Mycobacterium tuberculosis, the C-terminus of RpsA is known as tuberculosis drug target of pyrazinoic acid, which inhibits the interaction between MtRpsA and tmRNA in trans-translation. However, the molecular mechanism underlying the interaction of MtRpsA with tmRNA remains unknown. We herein analyzed the interaction of the C-terminal domain of MtRpsA with three RNA fragments poly(A), sMLD and pre-sMLD...
April 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28412308/genistein-prevention-of-hyperglycemia-and-improvement-of-glucose-tolerance-in-adult-non-obese-diabetic-mice-are-associated-with-alterations-of-gut-microbiome-and-immune-homeostasis
#10
Guannan Huang, Joella Xu, Daniel E Lefever, Travis C Glenn, Tamas Nagy, Tai L Guo
Although studies have linked soy phytoestrogen 4,7,4-trihydroxyisoflavone genistein (GEN) to reduced type 1 diabetes (T1D) risk, the mechanism of dietary GEN on T1D remains unknown. In our studies, adult non-obese diabetic (NOD) mouse model was employed to investigate the effects of GEN exposure on blood glucose level (BGL), glucose tolerance, gut microbiome, and immune responses. Adult male and female NOD mice were fed with either soy-based or casein-based diet, and received GEN at 20mg/kg body weight by gavage daily...
April 12, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28394238/anti-ribosomal-p-antibody-a-multicenter-study-in-childhood-onset-systemic-lupus-erythematosus-patients
#11
C C M Valões, B C Molinari, A C G Pitta, N W S Gormezano, S C L Farhat, K Kozu, A M E Sallum, S Appenzeller, A P Sakamoto, M T Terreri, R M R Pereira, C S Magalhães, J C O A Ferreira, C M Barbosa, F H Gomes, E Bonfá, C A Silva
Objectives Anti-ribosomal P protein (anti-P) autoantibodies are highly specific for systemic lupus erythematosus (SLE). However, the evaluation of this autoantibody in childhood-onset SLE (cSLE) populations has been limited to a few small series, hampering the interpretation of the clinical and laboratorial associations. Therefore, the objective of this multicenter cohort study was to evaluate demographic, clinical/laboratorial features, and disease damage score in cSLE patients with and without the presence of anti-P antibody...
April 2017: Lupus
https://www.readbyqxmd.com/read/28394228/electrophysiological-dysfunction-induced-by-anti-ribosomal-p-protein-antibodies-injection-into-the-lateral-ventricle-of-the-rat-brain
#12
N Gaburo, J Freire de Carvalho, C Timo-Iaria, C Bueno, M Reichlin, V S T Viana, E Bonfá
Objective Anti-ribosomal P antibodies (anti-P) are strongly associated with neuropsychiatric lupus. This study was designed to determine whether these antibodies are capable of causing electro-oscillogram (EOSG) and behavior alterations in rats. Methods IgG fraction anti-P positive and affinity-purified anti-P antibodies were injected intraventricularly in rats. Sequential cortical and subcortical EOSGs were analyzed during 30 days. IgG anti-Ro/SS-A and normal IgG were used as controls. Results All 13 animals injected with IgG anti-P demonstrated a high prevalence of polyspikes, diffusely distributed in hippocampal fields and cerebral cortex...
April 2017: Lupus
https://www.readbyqxmd.com/read/28394227/ribosomal-p-antibody-30-years-on-the-road
#13
V T Viana, L Durcan, E Bonfa, K B Elkon
The identity of the protein antigens targeted by anti-cytoplasmic antibodies in lupus was discovered 30 years ago. These antigens are three acidic ribosomal phosphoproteins, P0, P1, and P2. Precise identification of the shared epitope on these three proteins enabled sensitive and specific immunoassays to be developed. Anti-P antibodies are highly specific for systemic lupus erythematosus (SLE) and occur in 15%-35% of patients, depending on ethnicity as well as the age of onset. Increased frequencies of detection of anti-P have been reported in childhood SLE as well as in neuropsychiatric, renal, and hepatic disease...
April 2017: Lupus
https://www.readbyqxmd.com/read/28392906/selection-of-single-chain-variable-fragments-specific-for-mycobacterium-tuberculosis-esat-6-antigen-using-ribosome-display
#14
Shahrzad Ahangarzadeh, Mojgan Bandehpour, Bahram Kazemi
OBJECTIVES: Tuberculosis (TB) is still one of the problematic infectious diseases in developing countries, especially in Iran. In the present study, we applied ribosome display technique to select single chain variable fragments (scFvs) specific for the 6-kDa early secretory antigenic target (ESAT-6) antigen of Mycobacterium tuberculosis from a mouse scFv library. MATERIALS AND METHODS: The gene encoding ESAT-6 was cloned into pET22b(+) plasmid and expressed in Escherichia coli BL21 (DE3)...
March 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28392768/cannabidiol-reduces-leukemic-cell-size-but-is-it-important
#15
Nikoletta Kalenderoglou, Tara Macpherson, Karen L Wright
The anti-cancer effect of the plant-derived cannabinoid, cannabidiol, has been widely demonstrated both in vivo and in vitro. However, this body of preclinical work has not been translated into clinical use. Key issues around this failure can be related to narrow dose effects, the cell model used and incomplete efficacy. A model of acute lymphoblastic disease, the Jurkat T cell line, has been used extensively to study the cannabinoid system in the immune system and cannabinoid-induced apoptosis. Using these cells, this study sought to investigate the outcome of those remaining viable cells post-treatment with cannabidiol, both in terms of cell size and tracking any subsequent recovery...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28389897/novel-purification-method-and-antibiotic-activity-of-recombinant-momordica-charantia-map30
#16
Ching-Dong Chang, Ping-Yuan Lin, Yo-Chia Chen, Han-Hsiang Huang, Wen-Ling Shih
Ribosome-inactivating proteins (RIPs) are a group of enzymes originally isolated from plants that possess the ability to damage ribosomes in an irreversible manner, leading to inhibition of protein synthesis in eukaryotic cells. In this study, we aimed to purify recombinant RIPs, investigate their function in the treatment of bacterial infection, and determine their toxicity in mice. We employed a pMAL protein fusion and purification system using E. coli transformed with a plasmid containing MBP-tagged MAP30 cDNA...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28388532/cooperative-down-regulation-of-ribosomal-protein-l10-and-nf-%C3%AE%C2%BAb-signaling-pathway-is-responsible-for-the-anti-proliferative-effects-by-dmapt-in-pancreatic-cancer-cells
#17
Chen Shi, Yang Wang, Yuna Guo, Yijun Chen, Nan Liu
Dimethylaminoparthenolide (DMAPT), a water-soluble analogue of natural product parthenolide, possesses anti-inflammatory and anti-tumor activities. Despite that the anti- inflammatory mechanism of DMAPT has been well studied, specific target(s) for DMPAT and its anti-tumor mechanism remain poorly understood. In this study, to assess the anti-proliferative effects of DMAPT in pancreatic cancer cell lines and exploit its anti-tumor mechanism, serial affinity chromatograph was implemented to probe potential targets for DMAPT, revealing that ribosomal protein L10 (RPL10) is a specific binding protein of DMAPT in PANC-1 cells...
March 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28380459/abce1-orchestrates-m-phase-entry-and-cytoskeleton-architecture-in-mouse-oocyte
#18
Xiao-Fei Jiao, Chun-Jie Huang, Di Wu, Jia-Yu Zhang, Yu-Ting Long, Fan Chen, Xiang Li, Li-Jun Huo
ATP-binding cassette E1 (ABCE1) is a member of the ATP-binding cassette transporters and essential for diverse biological events regulating abroad range of biological functions including viral infection, cell proliferation, anti-apoptosis, translation initiation and ribosome biogenesis. Here, we discovered that Abce1 also plays indispensable roles in mouse oocyte meiotic progression. In the present study, we examined the expression, localization, and function of Abce1 during mouse oocyte meiotic maturation...
March 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28378131/balsamin-induces-apoptosis-in-breast-cancer-cells-via-dna-fragmentation-and-cell-cycle-arrest
#19
Parminder K Ajji, Marley J Binder, Ken Walder, Munish Puri
Breast cancer is the second most common cancer causing death worldwide with metastasis and disease relapse being the major drawbacks in current treatments. Therefore, development of novel drugs is needed. Balsamin, a 28 kDa Type I ribosome-inactivating protein, is rich in the seeds of Momordica balsamina. In this study, the molecular mechanism and the possible effects of balsamin on the two key hallmarks of cancer were investigated. Firstly, the induction of apoptosis in human breast cancer MCF-7 and BT549 cells showed that balsamin-induced apoptosis involved increases in caspase-3 and caspase-8 activity, upregulation of Bax, Bid, and Bad, and downregulation of BCL-2 and BCL-XL...
April 4, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28372034/molecular-identification-enzyme-assay-and-metabolic-profiling-of-trichoderma-spp
#20
Soo-Jung Bae, Young-Hwan Park, Hyeun-Jong Bae, Junhyun Jeon, Hanhong Bae
The goal of this study was to identify and characterize the selected Trichoderma isolates by metabolic profiling and enzyme assay for evaluation of their potential as biocontrol agents against plant pathogens. Trichoderma isolates were obtained from the Rural Development Administration (RDA) Genebank Information Center (GIC) (Wanju, Republic of Korea). Eleven Trichoderma isolates were re-identified using ribosomal DNA internal transcribed spacer (ITS) regions. ITS sequence results showed new identification of Trichoderma isolates...
April 3, 2017: Journal of Microbiology and Biotechnology
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