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https://www.readbyqxmd.com/read/28439815/the-effects-of-voluntary-physical-exercise-activated-neurotrophic-signaling-in-rat-hippocampus-on-mrna-levels-of-downstream-signaling-molecules
#1
Christina A E Solvsten, Tina F Daugaard, Yonglun Luo, Frank de Paoli, Jane H Christensen, Anders L Nielsen
Physical exercise results in the increased expression of neurotrophic factors and the subsequent induction of signal transduction cascades with a positive impact on neuronal functions. In this study, we used a voluntary physical exercise rat model to determine correlations in hippocampus mRNA expression of the neurotropic factors Bdnf, VegfA, and Igf1; their receptors TrkB, Igf1R, VegfR1, and VegfrR2; and downstream signal transducers Creb, Syn1, and Vgf. In hippocampi of physically exercised rats, the mRNA expression levels of Bdnf transcript 4 (Bdnf-t4), VegfA, and Igf1, as well as VegfR1, TrkB, Creb, Vgf, and Syn1, were increased...
April 24, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28437621/c21-steroidal-glycosides-from-cynanchum-auriculatum-and-their-neuroprotective-effects-against-h2o2-induced-damage-in-pc12%C3%A2-cells
#2
Xicheng Qian, Baocai Li, Peng Li, Dong Wang, Weifeng Dai, Mi Zhang
Twenty-three undescribed previously C21 steroidal glycosides, named saccatols D-K and cynsaccatols I-W, together with six known analogs were isolated from the roots of Cynanchum auriculatum Royle ex Wight (Apocynaceae). Their structures were elucidated by a variety of spectroscopic techniques, as well as HRESIMS and GC method. All isolated compounds were tested their neuroprotective effects on the model of H2O2-induced damage to PC12 cells. Except saccatols D-F, J, cynsaccatol V and wilfoside A, other twenty-three isolates produced significantly activities against H2O2-induced cell damage (P < 0...
April 21, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28436683/dexmedetomidine-protects-pc12-cells-from-lidocaine-induced-cytotoxicity-through-downregulation-of-col3a1-mediated-by-mir-let-7b
#3
Qiong Wang, Yingjun She, Xiaobao Bi, Baisong Zhao, Xiangcai Ruan, Yonghong Tan
Safety concerns of some local anesthetics, such as lidocaine, have been raised in recent years due to potential neurological impairment. Dexmedetomidine may protect humans from neurotoxicity, and miR-let-7b is activated by nerve injury; however, the roles of miR-let-7b and its target gene in lidocaine-induced cytotoxicity are not well known. Through bioinformatics and a luciferase reporter assay, COL3A1 was suggested as a direct target gene of miR-let-7b. Here, we confirmed by measuring mRNA and protein levels that miR-let-7b was downregulated and COL3A1 was upregulated in lidocaine-treated cells, an observation that was reversed by dexmedetomidine...
April 24, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28434975/protection-of-pc12%C3%A2-cells-from-cocaine-induced-cell-death-by-inhibiting-mitochondrial-permeability-transition
#4
Frederic Lamarche, Cecile Cottet-Rousselle, Luc Barret, Eric Fontaine
Cocaine abuse induces brain injury and neurodegeneration by a mechanism that has not yet been fully elucidated. Mitochondria play a key role in cell death processes, notably through the opening of the permeability transition pore (PTP). In this work, we examined the involvement of the PTP in cocaine-induced toxicity in PC12 cell lines. We used two different PTP inhibitors -i.e. cyclosporin A (CsA) and metformin-to assess their ability to counteract the cocaine induced effects. We first observed that a 48 h exposure to cocaine strongly sensitized cells to calcium overload, as measured by the calcium retention capacity...
April 20, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28432551/partial-p53-dependence-of-anisomycin-induced-apoptosis-in-pc12-cells
#5
R Schipp, J Varga, J Bátor, M Vecsernyés, Z Árvai, M Pap, József Szeberényi
The bacterial antibiotic anisomycin is known to induce apoptosis by activating several mitogen-activated protein kinases and by inhibiting protein synthesis. In this study, the influence of p53 protein on the apoptosis-inducing effect of anisomycin was investigated. The effect of protein synthesis-inhibiting concentration of anisomycin on apoptotic events was analyzed using Western blot, DNA fragmentation, and cell viability assays in wild-type PC12 and in mutant p53 protein expressing p143p53PC12 cells. Anisomycin stimulated the main apoptotic pathways in both cell lines, but p143p53PC12 cells showed lower sensitivity to the drug than their wild-type counterparts...
April 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28430606/ketamine-administered-pregnant-rats-impair-learning-and-memory-in-offspring-via-the-creb-pathway
#6
Xinran Li, Cen Guo, Yanan Li, Lina Li, Yuxin Wang, Yiming Zhang, Yue Li, Yu Chen, Wenhan Liu, Li Gao
Ketamine has been reported to impair the capacity for learning and memory. This study examined whether these capacities were also altered in the offspring and investigated the role of the CREB signaling pathway in pregnant rats, subjected to ketamine-induced anesthesia. On the 14th day of gestation (P14), female rats were anesthetized for 3 h via intravenous ketamine injection (200 mg/Kg). Morris water maze task, contextual and cued fear conditioning, and olfactory tasks were executed between the 25th to 30th day after birth (B25-30) on rat pups, and rats were sacrificed on B30...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28422319/exosomes-transfer-among-different-species-cells-and-mediating-mirnas-delivery
#7
Yueyuan Zhou, Tian Tian, Yanliang Zhu, Doulathunnisa, Feihu Hu, Yuhua Qi, Bo Sun, Zhongdang Xiao
Exosomes, the natural vehicles of intercellular communication, transfer proteins, mRNAs and microRNAs (miRNAs) and mediate many physiological and pathological processes. It is not clear that whether exosomal miRNAs could regulate gene expression across species, though some studies suggest interactions of exosomal miRNAs between cells. In this report, we have isolated exosomes from rat PC12 cells and assessed their internalization by human cancer Hela cells. The internalized exosomes were located in Hela lysosomes...
April 19, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28420170/fisetin-protects-pc12-cells-from-tunicamycin-mediated-cell-death-via-reactive-oxygen-species-scavenging-and-modulation-of-nrf2-driven-gene-expression-sirt1-and-mapk-signaling-in-pc12-cells
#8
Jui-Hung Yen, Pei-Shan Wu, Shu-Fen Chen, Ming-Jiuan Wu
BACKGROUND: Fisetin (3,7,3',4'-tetrahydroxyflavone) is a dietary flavonol and exhibits antioxidant, anti-inflammatory, and neuroprotective activities. However, high concentration of fisetin is reported to produce reactive oxygen species (ROS), induce endoplasmic reticulum (ER) stress and cause cytotoxicity in cancer cells. The aim of this study is to investigate the cytoprotective effects of low concentration of fisetin against tunicamycin (Tm)-mediated cytotoxicity in neuronal-like catecholaminergic PC12 cells...
April 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28415854/new-phenolic-acids-from-salvia-yunnanensis-c-h-wright
#9
Yun Yu, Yin-Ru Wang, Zhen-Huan Dong, Wei Li, Shu-Ming Li, Xue-Feng Huang
Two new phenolic acids, ethyl pro-lithospermate (1), n-butyl pro-lithospermate (2) were isolated from Salvia yunnanensis C.H.Wright, along with nineteen known compounds (3-21). The structures of the isolated compounds were elucidated on the basis of extensive spectrometry and by comparing their physical and spectroscopic data to the literature. Among them, compounds 11, 12 and 14-16 were firstly isolated from S. yunnanensis C.H.Wright. Some of the isolated compounds were evaluated for their neuroprotection...
April 18, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28415680/long-term-neurocognitive-dysfunction-in-offspring-via-ngf-erk-creb-signaling-pathway-caused-by-ketamine-exposure-during-the-second-trimester-of-pregnancy-in-rats
#10
Yanan Li, Xinran Li, Cen Guo, Lina Li, Yuxin Wang, Yiming Zhang, Yu Chen, Wenhan Liu, Li Gao
Early life exposure to ketamine caused neurohistopathologic changes and persistent cognitive dysfunction. For this study, a pregnant rat model was developed to investigate neurocognitive effects in the offspring, following ketamine exposure during the second trimester. Pregnant rats on gestational day 14 (equal to midtrimester pregnancy in humans), intravenously received 200 mg/kg ketamine for 3 h. Their behavior was tested (Morris water maze, odor recognition test, and fear conditioning) at postnatal days (P25-30)...
March 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414095/crosstalk-control-and-limits-of-physiological-c-jun-n-terminal-kinase-activity-for-cell-viability-and-neurite-stability-in-differentiated-pc12-cells
#11
Vicki Waetzig, Milana Belzer, Wiebke Haeusgen, Ruwen Boehm, Ingolf Cascorbi, Thomas Herdegen
The c-Jun N-terminal kinases (JNKs) are important mediators of cell viability and structural integrity in postmitotic neurons, which is required for maintaining synaptic connections and neural plasticity. In the present study, we chose differentiated PC12 cells as a well-characterised neuronal model system to selectively examine the regulation of basal JNK activity by extracellular signal-regulated kinase 1/2 (ERK1/2) and Akt. We detected a complex interaction between the kinases to prevent cell death and neurite loss...
April 14, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28412322/microrna-130b-transcriptionally-regulated-by-histone-h3-deacetylation-renders-akt-ubiquitination-and-apoptosis-resistance-to-6-ohda
#12
Liang Xu, Yu Jia, Xiang-Hong Yang, Fang Han, Yang Zheng, Yin Ni, Xu Chen, Jun Hong, Jing-Quan Liu, Qian Li, Ren-Hua Sun, Shi-Jing Mo
Apoptosis of DA neurons is a contributing cause of disability and death for Parkinson's disease (PD). Akt may become a potential therapeutic target for PD since Akt has been deactivated during DA neuron apoptosis. We previously demonstrated that Akt confers apoptosis resistance against 6-OHDA in DA neuron-like PC12 cells, yet the underlying mechanisms accounted for this are not fully understood. Here we report that microRNA-130b (miR-130b)-dependent and cylindromatosis (CYLD) repression-mediated Akt ubiquitination renders apoptosis resistance of PC12 cells to 6-OHDA, which elicits histone H3 deacetylation-induced transcriptional downregulation of miR-130b vice versa...
April 12, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28411149/neuroprotective-effect-of-three-caffeic-acid-derivatives-via-ameliorate-oxidative-stress-and-enhance-pka-creb-signaling-pathway
#13
Wei Fu, Hongyan Wang, Xiuhua Ren, Hengyi Yu, Yongfang Lei, Qian Chen
This study was conducted to elucidate the neuroprotective effect of caffeic acid phenethyl ester (CAPE), (R)-2-Hydroxy-3-(3,4-dihydroxyphenyl) propionic acid (Danshensu) and Curcumin, three caffeic acid derivatives which are contained in fruits, grains and certain dietary supplements. Our results showed that these compounds significantly attenuated H2O2-induced toxicity in PC12 cells in a dose-dependent manner. Furthermore, these compounds significantly improved the behavioral performance of d-gal-treated mice in both step-down avoidance test and Morris water maze test...
April 11, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28406733/cerebrosides-from-sea-cucumber-protect-against-oxidative-stress-in-samp8-mice-and-pc12-cells
#14
Hongxia Che, Lei Du, Peixu Cong, Suyuan Tao, Ning Ding, Fengjuan Wu, Changhu Xue, Jie Xu, Yuming Wang
Alzheimer's disease (AD) is a neurodegenerative disorder. Emerging evidence implicates β-amyloid (Aβ) plays a critical role in the progression of AD. In this study, we investigated the protective effect of cerebrosides obtained from sea cucumber against senescence-accelerated mouse prone 8 (SAMP8) mice in vivo. We also studied the effect of cerebrosides on Aβ-induced cytotoxicity on the rat pheochromocytoma cell (PC12) and the underlying molecular mechanisms. Cerebrosides ameliorated learning and memory deficits and the Aβ accumulation in demented mice, decreased the content of malondialdehyde (MDA), 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-OHdG), 8-hydroxy-2'-deoxyguanosine (8-oxo-G), and nitric oxide (NO), and enhanced the superoxide dismutase (SOD) activity significantly...
April 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28406608/functionalized-carbon-nanotube-and-graphene-oxide-embedded-electrically-conductive-hydrogel-synergistically-stimulates-nerve-cell-differentiation
#15
Xifeng Liu, A Lee Miller, Sungjo Park, Brian E Waletzki, Zifei Zhou, Andre Terzic, Lichun Lu
Nerve regeneration after injury is a critical medical issue. In previous work, we have developed an oligo(poly(ethylene glycol) fumarate) (OPF) hydrogel incorporated with positive charges as a promising nerve conduit. In this study, we introduced cross-linkable bonds to graphene oxide and carbon nanotube to obtain the functionalized graphene oxide acrylate (GOa) and carbon nanotube poly(ethylene glycol) acrylate (CNTpega). An electrically conductive hydrogel was then fabricated by covalently embedding GOa and CNTpega within OPF hydrogel through chemical cross-linking followed by in situ reduction of GOa in l-ascorbic acid solution...
April 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28397192/effects-of-asarinin-on-dopamine-biosynthesis-and-6-hydroxydopamine-induced-cytotoxicity-in-pc12-cells
#16
Hyun Jin Park, Kyung Sook Lee, Ting Ting Zhao, Kyung Eun Lee, Myung Koo Lee
This study investigated the effects of asarinin on dopamine biosynthesis and 6-hydroxydopamine (6-OHDA)-induced cytotoxicity in rat adrenal pheochromocytoma (PC12) cells. Treatment with asarinin (25-50 μM) increased intracellular dopamine levels and enhanced L-DOPA-induced increases in dopamine levels. Asarinin (25 μM) induced cyclic AMP-dependent protein kinase A (PKA) signaling, leading to increased cyclic AMP-response element binding protein (CREB) and tyrosine hydroxylase (TH) phosphorylation, which in turn stimulated dopamine production...
April 10, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28396216/assessment-of-the-potential-activity-of-major-dietary-compounds-as-selective-estrogen-receptor-modulators-in-two-distinct-cell-models-for-proliferation-and-differentiation
#17
Sylvain Lecomte, Marie Lelong, Gaëlle Bourgine, Theo Efstathiou, Christian Saligaut, Farzad Pakdel
Estrogen receptors (ERs) α and β are distributed in most tissues of women and men. ERs are bound by estradiol (E2), a natural hormone, and mediate the pleiotropic and tissue-specific effects of E2, such as proliferation of breast epithelial cells or protection and differentiation of neuronal cells. Numerous environmental molecules, called endocrine disrupting compounds, also interact with ERs. Phytoestrogens belong to this large family and are considered potent therapeutic molecules that act through their selective estrogen receptor modulator (SERM) activity...
April 7, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28394604/neuroprotective-activity-of-cerebrosides-from-typhonium-giganteum-by-regulating-caspase-3-and-bax-bcl-2-signaling-pathways-in-pc12-cells
#18
Yang Jin, Jun-Ting Fan, Xiao-Ling Gu, Li-Ying Zhang, Jing Han, Shu-Hu Du, Ai-Xia Zhang
An investigation of the potential neuroprotective natural product constituents of the rhizomes of Typhonium giganteum led to the isolation of two new cerebrosides, typhonosides B (1) and C (2), along with 11 known analogues (3-13). The structures of compounds 1 and 2 were elucidated by spectroscopic data interpretation. The activity of these compounds against glutamate-induced cell apoptosis was investigated in PC12 cells. All compounds exhibited such activity, which was related to the length of the fatty acyl chain...
April 10, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28393656/punicalagin-reduces-h2o2-induced-cytotoxicity-and-apoptosis-in-pc12-cells-by-modulating-the-levels-of-reactive-oxygen-species
#19
Maria Elisabetta Clementi, Giovambattista Pani, Beatrice Sampaolese, Giuseppe Tringali
BACKGROUND: Oxidative stress has long been linked to neuronal cell death in many neurodegenerative diseases. Antioxidant conventional supplements are poorly effective in preventing neuronal damage caused by oxidative stress due to their inability to cross the blood brain barrier. Hence the use of molecules extracted from plants and fruits such as phenolics, flavonoids, and terpenoids compounds constitute a new wave of antioxidant therapies to defend against free radicals. OBJECTIVE: In this study we examined the effects of punicalagin, a ellagitannin isolated from the pomegranate juice, on a rat adrenal pheochromocytoma cell line, treated with hydrogen peroxide, evaluating the viability, oxidation potential, mitochondrial function, and eventual apoptosis...
April 9, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28392359/intracranial-self-stimulation-reward-induces-neurite-extension-in-pc12m3-cells-and-activation-of-the-p38-mapk-pathway
#20
Yutaka Gomita, Satoru Esumi, Naoya Sugiyama, Yoshihisa Kitamura, Yoshihisa Koike, Hirotoshi Motoda, Toshiaki Sendo, Yoshio Kano
Factors that trigger emotional expression may be divided into two patterns according to the type of motivation, acquiring reward (pleasure) and avoiding aversion (punishment). Repeated exposure to certain external stimuli accompanied by aberrant motivation may produce psychiatric diseases such as bipolar disorder and addiction via dysregulation of the central nervous system. However, neurobiological underpinnings of such diseases have not been clarified, especially at the neuronal level. In the present study, plasma from rats undergoing intracranial self-stimulation (ICSS) produced neurite outgrowth in PC12-variant cells (PC12m3)...
April 6, 2017: Neuroscience Letters
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