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https://www.readbyqxmd.com/read/28917448/in-vitro-antitumor-activity-of-novel-benzimidazole-based-cu-ii-complexes
#1
Jiyong Hu, Yan Guo, Jin'an Zhao, Junshuai Zhang
Four benzimidazole-based Cu(II) complexes: Cu2(p-2-bmp)2Br4 (1), Cu2(p-2-bmp)2Cl4 (2), Cu2(p-2-bmb)2(DMF)2Br4·(CHCl3) (3), and Cu(p-2-bmb)(NO3)2·(CHCl3) (4) were isolated and characterized, where p-2-bmp is 1-((2-(pyridine-2-yl)-1H-benzoimidazol-1-yl)methyl)-1H-pyridine and p-2-bmb is 1-((2-(pyridin-2-yl)-1-benzoimidazol-1-yl)methyl)-1H-benzotriazole. Complexes 1 and 2 have binuclear configurations, 3 has a mononuclear structure, and 4has a one-dimensional (1-D) chain skeleton. To evaluate their potential anticancer effects on human carcinoma cells, anti-proliferation, DNA binding and cleavage, and apoptosis elicitation were examined...
September 5, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28916166/antagomir-613-protects-neuronal-cells-from-oxygen-glucose-deprivation-re-oxygenation-via-increasing-sphk2-expression
#2
Guangfu Di, Zhichun Wang, Wenming Wang, Feng Cheng, Hua Liu
Oxygen glucose deprivation (OGD)/re-oxygenation (OGDR) causes damages to neuronal cells. Sphingosine kinase 2 (SphK2) expression could exert neuroprotective functions. Here, we aim to induce SphK2 expression via inhibiting the anti-SphK2 microRNA: microRNA-613 ("miR-613"). In both SH-SY5Y neuronal cells and primary murine hippocampal neurons, transfection of the miR-613's specific inhibitor, antagomiR-613 ("antamiR-613"), induced miR-613 depletion and SphK2 expression. Reversely, forced over-expression of miR-613 caused SphK2 downregulation in SH-SY5Y cells...
September 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28914406/manganese-induced-neurotoxicity-and-alterations-in-gene-expression-in-human-neuroblastoma-sh-sy5y-cells
#3
Deepa Gandhi, Saravanadevi Sivanesan, Krishnamurthi Kannan
Manganese (Mn) is an essential trace element required for many physiological functions including proper biochemical and cellular functioning of the central nervous system (CNS). However, exposure to excess level of Mn through occupational settings or from environmental sources has been associated with neurotoxicity. The cellular and molecular mechanism of Mn-induced neurotoxicity remains unclear. In the current study, we investigated the effects of 30-day exposure to a sub-lethal concentration of Mn (100 μM) in human neuroblastoma cells (SH-SY5Y) using transcriptomic approach...
September 15, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28912423/the-chinese-herbal-formula-free-and-easy-wanderer-ameliorates-oxidative-stress-through-keap1-nrf2-ho-1-pathway
#4
Chunlan Hong, Jingming Cao, Ching-Fen Wu, Onat Kadioglu, Anja Schüffler, Ulrich Kauhl, Sabine M Klauck, Till Opatz, Eckhard Thines, Norbert W Paul, Thomas Efferth
Posttraumatic stress disorder (PTSD) gains a lot of attention due to high prevalence and strong psychological upset, but the etiology remains undefined and effective treatment is quite limited. Growing studies demonstrated the involvement of oxidative stress in various psychiatry diseases, suggesting anti-oxidation therapy might be a strategy for PTSD treatment. Free and Easy Wanderer (FAEW) is a poly-herbal drug clinically used in China for hundreds of years in the treatment of psychiatric disorder. We hypothesized that FAEW exerts clinical effects through the activity against oxidative stress with fluoxetine as antidepressant control drug...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910862/effects-of-newly-synthesized-recombinant-human-amyloid-%C3%AE-complexes-and-poly-amyloid-%C3%AE-fibers-on-cell-apoptosis-and-cognitive-decline
#5
Soojin Park, Jae-Won Huh, Taekil Eom, Naeun Na, Youngjeon Lee, Ju-Sung Kim, Sun-Uk Kim, Insop Shim, Sang-Rae Lee, Ekyune Kim
The main pathological hallmark of Alzheimer's disease is the deposition of amyloid-β peptide (Aβ) in the brain. Aβ has been widely used to mimic several aspects of Alzheimer's disease. However, several characteristics of amyloid-induced Alzheimer's disease pathology are not well established, especially in mice. The present study aimed to develop a new Alzheimer's disease model by investigating how amyloid beta can be effectively aggregated using prokaryotes and eukaryotes. To express the Aβ42 complex in HEK293 cells, we cloned the Aβ42 region repeatedly and incorporated the resulting construct into a eukaryotic expression vector...
September 15, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28910697/in-vitro-assessment-of-neurotoxicity-and-neuroinflammation-of-homemade-mwcnts
#6
Giuseppa Visalli, Monica Currò, Daniela Iannazzo, Alessandro Pistone, Marianna Pruiti Ciarello, Giuseppe Acri, Barbara Testagrossa, Maria Paola Bertuccio, Raffaele Squeri, Angela Di Pietro
Multi walled carbon nanotubes (MWCNTs) activate pathways involved in cytotoxicity, genotoxicity and inflammation. Inhaled MWCNTs are translocated to extra pulmonary organs and their hydrophobicity allows them to cross the blood-brain barrier (BBB). Further exposure of central nervous system (CNS) occurs via olfactory neurons. Using differentiated SH-SY5Y, we studied the neurotoxicity and neuroinflammation of pristine and functionalised MWCNTs. ROS overproduction was dose- and time-dependent (P<0.01) and was related to mitochondrial impairment, DNA damage and decreased viability (P<0...
September 7, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28904402/power-frequency-magnetic-field-promotes-a-more-malignant-phenotype-in-neuroblastoma-cells-via-redox-related-mechanisms
#7
S Falone, S Santini, V Cordone, P Cesare, A Bonfigli, M Grannonico, G Di Emidio, C Tatone, M Cacchio, F Amicarelli
In accordance with the classification of the International Agency for Research on Cancer, extremely low frequency magnetic fields (ELF-MF) are suspected to promote malignant progression by providing survival advantage to cancer cells through the activation of critical cytoprotective pathways. Among these, the major antioxidative and detoxification defence systems might be targeted by ELF-MF by conferring cells significant resistance against clinically-relevant cytotoxic agents. We investigated whether the hyperproliferation that is induced in SH-SY5Y human neuroblastoma cells by a 50 Hz, 1 mT ELF magnetic field was supported by improved defence towards reactive oxygen species (ROS) and xenobiotics, as well as by reduced vulnerability against both H2O2 and anti-tumor ROS-generating drug doxorubicin...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899780/hydrogen-peroxide-production-is-affected-by-oxygen-levels-in-mammalian-cell-culture
#8
Lucas A Maddalena, Shehab M Selim, Joao Fonseca, Holt Messner, Shannon McGowan, Jeffrey A Stuart
Although oxygen levels in the extracellular space of most mammalian tissues are just a few percent, under standard cell culture conditions they are not regulated and are often substantially higher. Some cellular sources of reactive oxygen species, like NADPH oxidase 4, are sensitive to oxygen levels in the range between 'normal' physiological (typically 1-5%) and standard cell culture (up to 18%). Hydrogen peroxide in particular participates in signal transduction pathways via protein redox modifications, so the potential increase in its production under standard cell culture conditions is important to understand...
September 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28891753/the-influence-of-schisandrin-b-on-a-model-of-alzheimer-s-disease-using-%C3%AE-amyloid-protein-a%C3%AE-1-42-mediated-damage-in-sh-sy5y-neuronal-cell-line-and-underlying-mechanisms
#9
Ming Zhang, Hong-Xia Zheng, Yang-Yang Gao, Bo Zheng, Jing-Ping Liu, He Wang, Zhan-Jun Yang, Zhi-Ying Zhao
Schisandrin B, an active substance, is derived from Chinese herb fruit Wuweizi, which exerts various pharmacological activities and has displayed significant beneficial effects in ameliorating Alzheimer's disease (AD). The aim of this study was to further extend our examination for the use of schisandrin B extract in the potential treatment of AD effects by investigating DNA methylation (DNMT), known to be modified in this disease using SH-SY5Y neuronal cell line exposed to β-amyloid protein (Aβ1-42). In particular, the purpose of this investigation was to examine alterations in mRNA and protein expression of DNMT...
September 11, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28891114/blood-brain-barrier-permeability-of-green-tea-catechin-metabolites-and-their-neuritogenic-activity-in-human-neuroblastoma-sh-sy5y-cells
#10
Keiko Unno, Monira Pervin, Aimi Nakagawa, Kazuaki Iguchi, Aya Hara, Akiko Takagaki, Fumio Nanjo, Akira Minami, Yoriyuki Nakamura
SCOPE: To understand the mechanism by which green tea lowers the risk of dementia, focus was placed on the metabolites of epigallocatechin gallate (EGCG), the most abundant catechin in green tea. Much of orally ingested EGCG is hydrolyzed to epigallocatechin (EGC) and gallic acid. In rats, EGC is then metabolized mainly to 5-(3', 5'-dihydroxyphenyl)-γ-valerolactone (EGC-M5) and its conjugated forms, which are distributed to various tissues. Therefore, we examined the permeability of these metabolites into the blood-brain barrier (BBB), and nerve cell proliferation/differentiation in vitro...
September 11, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28890319/arctic-a%C3%AE-40-blocks-the-nicotine-induced-neuroprotective-effect-of-chrna7-by-inhibiting-the-erk1-2-pathway-in-human-neuroblastoma-cells
#11
Ye Ju, Toru Asahi, Naoya Sawamura
Amyloid β protein (Aβ) plays a central role in Alzheimer's disease (AD) pathogenesis. Point mutations in the Aβ sequence, which cluster around the central hydrophobic core of the peptide, are associated with familial AD (FAD). Several mutations have been identified, with the Arctic mutation exhibiting a purely cognitive phenotype that is typical of AD. Our previous findings suggest that Arctic Aβ40 binds to and aggregates with CHRNA7, thereby inhibiting the calcium response and signaling pathways downstream of the receptor...
September 8, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28887651/a-cell-culture-model-for-investigation-of-synapse-influenceability-epigenetics-expression-and-function-of-gene-targets-important-for-synapse-formation-and-preservation-in-sh-sy5y-neuroblastoma-cells-differentiated-by-retinoic-acid
#12
Kirsten Jahn, C Wieltsch, N Blumer, M Mehlich, H Pathak, A Q Khan, H Hildebrandt, H Frieling
SH-SY5Y neuroblastoma cells are frequently used for different neuronal cell culture models. As there is no "gold-standard", miscellaneous protocols exist to differentiate these cells into a neuronal cell type. Here, the aim was to find a differentiation condition making cells suitable for investigation of influenceability of synapses by environmental conditions in pharmacologic experiments. For this purpose, effects on synapse molecules should be somehow rateable and cells should be usable for functional analysis like calcium imaging...
September 8, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28883518/new-compounds-identified-through-in-silico-approaches-reduce-the-%C3%AE-synuclein-expression-by-inhibiting-prolyl-oligopeptidase-in-vitro
#13
Raj Kumar, Rohit Bavi, Min Gi Jo, Venkatesh Arulalapperumal, Ayoung Baek, Shailima Rampogu, Myeong Ok Kim, Keun Woo Lee
Prolyl oligopeptidase (POP) is a serine protease that is responsible for the maturation and degradation of short neuropeptides and peptide hormones. The inhibition of POP has been demonstrated in the treatment of α-synucleinopathies and several neurological conditions. Therefore, ligand-based and structure-based pharmacophore models were generated and validated in order to identify potent POP inhibitors. Pharmacophore-based and docking-based virtual screening of a drug-like database resulted in 20 compounds...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28882943/tissue-directed-implantation-using-ultrasound-visualization-for-development-of-biologically-relevant-metastatic-tumor-xenografts
#14
Raelene A VAN Noord, Tina Thomas, Melanie Krook, Sahiti Chukkapalli, Mark J Hoenerhoff, Jonathan R Dillman, Elizabeth R Lawlor, Valerie P Opipari, Erika A Newman
BACKGROUND: Advances in cancer therapeutics depend on reliable in vivo model systems. To develop biologically relevant xenografts, ultrasound was utilized for tissue-directed implantation of neuroblastoma (NB) cell line and patient-derived tumors in the adrenal gland, and for renal subcapsular engraftment of Ewing's sarcoma (ES). MATERIALS AND METHODS: NB xenografts were established by direct adrenal injection of luciferase-transfected NB cell lines (IMR32, SH-SY5Y, SK-N-BE2) or NB patient-derived tumor cells (UMNBL001, UMNBL002)...
September 2017: In Vivo
https://www.readbyqxmd.com/read/28878621/the-networks-of-genes-encoding-palmitoylated-proteins-in-axonal-and-synaptic-compartments-are-affected-in-ppt1-overexpressing-neuronal-like-cells
#15
Francesco Pezzini, Marzia Bianchi, Salvatore Benfatto, Francesca Griggio, Stefano Doccini, Rosalba Carrozzo, Arvydas Dapkunas, Massimo Delledonne, Filippo M Santorelli, Maciej M Lalowski, Alessandro Simonati
CLN1 disease (OMIM #256730) is an early childhood ceroid-lipofuscinosis associated with mutated CLN1, whose product Palmitoyl-Protein Thioesterase 1 (PPT1) is a lysosomal enzyme involved in the removal of palmitate residues from S-acylated proteins. In neurons, PPT1 expression is also linked to synaptic compartments. The aim of this study was to unravel molecular signatures connected to CLN1. We utilized SH-SY5Y neuroblastoma cells overexpressing wild type CLN1 (SH-p.wtCLN1) and five selected CLN1 patients' mutations...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28878400/thiamine-antagonists-trigger-p53-dependent-apoptosis-in-differentiated-sh-sy5y-cells
#16
Sergiy Chornyy, Yulia Parkhomenko, Nataliya Chorna
Accumulating evidences suggest that p53 is a key coordinator of cellular events triggered by oxidative stress often associated with the impairment in thiamine metabolism and its functions. However, there are limited data regarding the pursuant feedback between p53 transactivation and thiamine homeostasis. Impairment in thiamine metabolism can be induced experimentally via interference with the thiamine uptake and/or inhibition of the thiamin pyrophosphate-dependent enzymes using thiamine antagonists - amprolium (AM), oxythiamine (OT) or pyrithiamine (PT)...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28877763/alzheimer-s-disease-pathological-lesions-activate-the-spleen-tyrosine-kinase
#17
Jonas Elias Schweig, Hailan Yao, David Beaulieu-Abdelahad, Ghania Ait-Ghezala, Benoit Mouzon, Fiona Crawford, Michael Mullan, Daniel Paris
The pathology of Alzheimer's disease (AD) is characterized by dystrophic neurites (DNs) surrounding extracellular Aβ-plaques, microgliosis, astrogliosis, intraneuronal tau hyperphosphorylation and aggregation. We have previously shown that inhibition of the spleen tyrosine kinase (Syk) lowers Aβ production and tau hyperphosphorylation in vitro and in vivo. Here, we demonstrate that Aβ-overexpressing Tg PS1/APPsw, Tg APPsw mice, and tau overexpressing Tg Tau P301S mice exhibit a pathological activation of Syk compared to wild-type littermates...
September 6, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28874085/comparing-the-dopaminergic-neurotoxic-effects-of-benzylpiperazine-and-benzoylpiperazine
#18
Daniel P Katz, Mohammed Majrashi, Sindhu Ramesh, Manoj Govindarajulu, Dwipayan Bhattacharya, Subhrajit Bhattacharya, Aiman Shalgum, Chastity Bradford, Vishnu Suppiramaniam, Jack Deruiter, C Randall Clark, Muralikrishnan Dhanasekaran
Benzylpiperazine has been designated as Schedule I substance under the Controlled Substances Act by Drug Enforcement Administration. Benzylpiperazine is a piperazine derivative, elevates both dopamine and serotonin extracellular levels producing stimulatory and hallucinogenic effects, respectively, similar to methylenedioxymethamphetamine (MDMA). However, the comparative neurotoxic effects of Piperazine derivatives (Benzylpiperazine and Benzoylpiperazine) have not been elucidated. Here, piperazine derivatives (Benzylpiperazine and Benzoylpiperazine) were synthesized in our lab and the mechanisms of cellular-based neurotoxicity were elucidated in a dopaminergic human neuroblastoma cell line (SH-SY5Y)...
September 5, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28870815/activation-of-transient-receptor-potential-melastatin-7-trpm7-channel-increases-basal-autophagy-and-reduces-amyloid-%C3%AE-peptide
#19
Hyun Geun Oh, Sungkwon Chung
Cerebral accumulation of amyloid β-peptide (Aβ), which is produced from amyloid precursor protein (APP), is the primary cause of Alzheimer's disease (AD). Autophagy recycles cellular components and digests intracellular components including Aβ. The Ca(2+)- and Mg(2+)-permeable transient receptor potential melastatin 7 (TRPM7) channel underlies the constitutive Ca(2+) influx in some cells. Since we already reported that TRPM7 channel-mediated Ca(2+) influx regulates basal autophagy, we hypothesize that the activation of TRPM7 channel could increase basal autophagy and consequently decrease Aβ...
September 1, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28866709/artemether-regulates-chemosensitivity-to-doxorubicin-via-regulation-of-b7-h3-in-human-neuroblastoma-cells
#20
Wei-Qiang Tan, Gang Chen, Ming Ye, Bing Jia
BACKGROUND Artemether, originally used for malaria, exhibits potential therapeutic efficacy against several types of cancer, including gastric cancer, hepatocellular carcinoma, and gliomas. In this study, we investigated the role and mechanism of artemether on drug resistance of neuroblastoma cells. MATERIAL AND METHODS Cell viability and proliferation were determined by CCK-8 and EdU incorporation assay, respectively. Gene expression was measured by real-time PCR and Western blot analysis. RESULTS Our results revealed that artemether treatment remarkably inhibited the proliferation of neuroblastoma cell lines SH-SY5Y, SK-N-SH, and SK-N-BE2...
September 3, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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