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https://www.readbyqxmd.com/read/28339691/z-guggulsterone-produces-antidepressant-like-effects-in-mice-through-activation-of-the-bdnf-signaling-pathway
#1
Chao Huang, Wen-Feng Hu, Ji-Li Wang, Peng Wang, Yu Gong, Li-Juan Tong, Bo Jiang, Wei Zhang, Yi-Bin Qin, Zhuo Chen, Rong-Rong Yang
Background: Z-guggulsterone, an active compound extracted from the gum resin of the tree commiphora mukul, has been shown to improve animal memory deficits via activating the brain-derived neurotrophic factor (BDNF) signaling pathway. Here, we investigated the antidepressant-like effect of Z-guggulsterone in a chronic unpredictable stress (CUS) mouse model of depression. Methods: The effects of Z-guggulsterone were assessed in mice tail suspension test (TST), forced swimming test (FST)...
February 21, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28334019/cell-survival-and-differentiation-with-nanocrystalline-glass-like-carbon-using-substantia-nigra-dopaminergic-cells-derived-from-transgenic-mouse-embryos
#2
Noela Rodriguez-Losada, Pablo Romero, Guillermo Estivill-Torrús, Roberto Guzmán de Villoria, Jose A Aguirre
Regenerative medicine requires, in many cases, physical supports to facilitate appropriate cellular architecture, cell polarization and the improvement of the correct differentiation processes of embryonic stem cells, induced pluripotent cells or adult cells. Because the interest in carbon nanomaterials has grown within the last decade in light of a wide variety of applications, the aim of this study was to test and evaluate the suitability and cytocompatibility of a particular nanometer-thin nanocrystalline glass-like carbon film (NGLC) composed of curved graphene flakes joined by an amorphous carbon matrix...
2017: PloS One
https://www.readbyqxmd.com/read/28332824/indole-substituted-benzothiazoles-and-benzoxazoles-as-selective-and-reversible-mao-b-inhibitors-for-treatment-of-parkinson-s-disease
#3
Min-Ho Nam, Moosung Park, Hyeri Park, Youngjae Kim, Seulki Yoon, Vikram Shahaji Sawant, Ji Won Choi, Jong-Hyun Park, Ki Duk Park, Sun-Joon Min, Changjoon Justin Lee, Hyunah Choo
To develop a novel, selective, and reversible MAO-B inhibitors for safer treatment of Parkinson's disease, benzothiazole and benzoxazole derivatives with indole moiety were designed and synthesized. Most of the synthesized compounds showed inhibitory activities against MAO-B and selectivity over MAO-A. The most active compound was Compound 5b, 6-fluoro-2-(1-methyl-1H-indol-5-yl)benzo[d]thiazole with an IC50 value of 29 nM with no apparent effect on MAO-A activity at 10 M. Based on the reversibility assay, Compound 5b turned out to be a fully reversible with over 95% of recovery of enzyme activity after washout of the compound...
March 23, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28332006/prenatal-nicotine-exposure-decreases-the-release-of-dopamine-in-the-medial-frontal-cortex-and-induces-atomoxetine-responsive-neurobehavioral-deficits-in-mice
#4
Tursun Alkam, Takayoshi Mamiya, Nami Kimura, Aya Yoshida, Daisuke Kihara, Yuki Tsunoda, Yuki Aoyama, Masayuki Hiramatsu, Hyoung-Chun Kim, Toshitaka Nabeshima
Increased risk of attention-deficit/hyperactivity disorder (AD/HD) is partly associated with the early developmental exposure to nicotine in tobacco smoke. Emerging reports link tobacco smoke exposure or prenatal nicotine exposure (PNE) with AD/HD-like behaviors in rodent models. We have previously reported that PNE induces cognitive behavioral deficits in offspring and decreases the contents of dopamine (DA) and its turnover in the prefrontal cortex (PFC) of offspring It is well known that the dysfunction of DAergic system in the brain is one of the core factors in the pathophysiology of AD/HD...
March 23, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28322767/cloning-localization-and-differential-expression-of-neuropeptide-y-during-early-brain-development-and-gonadal-recrudescence-in-the-catfish-clarias-gariepinus
#5
Cheni-Chery Sudhakumari, Arumugam Anitha, Raju Murugananthkumar, Dinesh Kumar Tiwari, Dharavath Bhasker, Balasubramanian Senthilkumaran, Aparna Dutta Gupta
Neuropeptide-Y (NPY) has diverse physiological functions which are extensively studied in vertebrates. However, regulatory role of NPY in relation to brain ontogeny and recrudescence with reference to reproduction is less understood in fish. Present report for the first time evaluated the significance of NPY by transient esiRNA silencing and also analyzed its expression during brain development and gonadal recrudescence in the catfish, Clarias gariepinus. As a first step, full-length cDNA of NPY was cloned from adult catfish brain, which shared high homology with its counterparts from other teleosts upon phylogenetic analysis...
March 17, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28321769/n-propargyl-caffeamide-paca-ameliorates-dopaminergic-neuronal-loss-and-motor-dysfunctions-in-mptp-mouse-model-of-parkinson-s-disease-and-in-mpp-induced-neurons-via-promoting-the-conversion-of-prongf-to-ngf
#6
Dan Luo, Jia Zhao, Yuanyuan Cheng, Simon Ming-Yuen Lee, Jianhui Rong
Insufficient production of nerve growth factor (NGF) is implicated in Parkinson's disease (PD). We recently discovered that caffeic acid derivative N-propargyl caffeamide (PACA) not only potentiated NGF-induced neurite outgrowth but also attenuated 6-hydroxydopamine neurotoxicity in neuronal culture. The aim of the present study was to investigate whether PACA could increase NGF levels against 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine (MPTP) neurotoxicity in a mouse PD model. We induced parkinsonism in mice by intraperitoneal injection of MPTP for seven consecutive days...
March 21, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28320278/cooperative-synthesis-of-dopamine-in-rat-mediobasal-hypothalamus-as-a-compensatory-mechanism-in-hyperprolactinemia
#7
A U Kurina, T S Pronina, L K Dilmukhametova, G V Maleev, M V Ugrumov
Dopamine (DA), synthesized in the mediobasal hypothalamus by dopaminergic neurons containing two enzymes of DA synthesis - tyrosine hydroxylase and decarboxylase of aromatic L-amino acids, or by monoenzymatic non-dopaminergic neurons containing one DA synthesis enzyme in cooperation, is known to have an inhibitory effect on prolactin secretion. Deterioration of this inhibitory control leads to an increase in prolactin concentration in the blood and to the development of hyperprolactinemia syndrome. In a rat model of hyperprolactinemia induced by administration of a neurotoxin causing degeneration of dopaminergic and noradrenergic neurons, the level of DA first decreases, leading to an increase in prolactin level (decompensation stage), while later both levels are restored to normal (compensation stage)...
March 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28315292/hypoxic-culture-promotes-dopaminergic-neuronal-differentiation-of-nasal-olfactory-mucosa-mesenchymal-stem-cells-via-up-regulation-of-hypoxia-inducible-factor-1%C3%AE
#8
Yi Zhuo, Lei Wang, Lite Ge, Xuan Li, Ping Chen, Da Duan, Xiaohua Teng, Miao Jiang, Kai Liu, Ting Yuan, Pei Wu, Hao Wang, Yujia Deng, Huali Xie, Ying Xia, Ming Lu
<p><b>Background</b> Olfactory mucosa mesenchymal stem cells (OM-MSCs) display significant clonogenicactivity and may be easily propagated for Parkinson's disease therapies. Methods of inducing OM-MSCs to differentiate into dopaminergic (DAergic) neurons using olfactory ensheathing cells (OECs) is thus an attractive topic of research.</p><p><b>Methods</b> We designed a hypoxic-induction protocol to generate DAergic neurons from OM-MSCs using a physiological oxygen (O2) level of 3% and OEC-conditioned medium (HI group)...
March 17, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28303496/three-types-of-a11-neurons-project-to-the-rat-spinal-cord
#9
Hidechika Ozawa, Tsuyoshi Yamaguchi, Shinsuke Hamaguchi, Shigeki Yamaguchi, Shuichi Ueda
The A11 dopaminergic cell group is the only group among the A8-A16 dopaminergic cell groups that includes neurons innervating the spinal cord, and a decrease in dopaminergic transmission at the spinal cord is thought to contribute to the pathogenesis of restless legs syndrome. However, the mechanisms regulating the neuronal activity of A11 dopaminergic neurons remain to be elucidated. Unraveling the neuronal composition, distribution and connectivity of A11 neurons would provide insights into the mechanisms regulating the spinal dopaminergic system...
March 16, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28303260/evidence-for-an-additive-neurorestorative-effect-of-simultaneously-administered-cdnf-and-gdnf-in-hemiparkinsonian-rats-implications-for-different-mechanism-of-action
#10
Merja H Voutilainen, Francesca De Lorenzo, Polina Stepanova, Susanne Bäck, Li-Ying Yu, Päivi Lindholm, Eeva Pörsti, Mart Saarma, Pekka T Männistö, Raimo K Tuominen
Parkinson's disease (PD) is a neurodegenerative disorder associated with a progressive loss of dopaminergic (DAergic) neurons of the substantia nigra (SN) and the accumulation of intracellular inclusions containing α-synuclein. Current therapies do not stop the progression of the disease, and the efficacy of these treatments wanes over time. Neurotrophic factors (NTFs) are naturally occurring proteins promoting the survival and differentiation of neurons and the maintenance of neuronal contacts. CDNF (cerebral dopamine NTF) and GDNF (glial cell line-derived NTF) are able to protect DAergic neurons against toxin-induced degeneration in experimental models of PD...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28299414/photobiomodulation-induced-changes-in-a-monkey-model-of-parkinson-s-disease-changes-in-tyrosine-hydroxylase-cells-and-gdnf-expression-in-the-striatum
#11
Nabil El Massri, Ana P Lemgruber, Isobel J Rowe, Cécile Moro, Napoleon Torres, Florian Reinhart, Claude Chabrol, Alim-Louis Benabid, John Mitrofanis
Intracranial application of red to infrared light, known also as photobiomodulation (PBM), has been shown to improve locomotor activity and to neuroprotect midbrain dopaminergic cells in rodent and monkey models of Parkinson's disease. In this study, we explored whether PBM has any influence on the number of tyrosine hydroxylase (TH)(+)cells and the expression of GDNF (glial-derived neurotrophic factor) in the striatum. Striatal sections of MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine)-treated mice and monkeys and 6-hydroxydopamine (6OHDA)-lesioned rats that had PBM optical fibres implanted intracranially (or not) were processed for immunohistochemistry (all species) or western blot analysis (monkeys)...
March 15, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28298357/how-important-is-the-%C3%AE-1-adrenoceptor-in-primate-and-rodent-proximal-urethra-sex-differences-in-the-contribution-of-%C3%AE-1-adrenoceptor-to-urethral-contractility
#12
Eduardo C Alexandre, Mariana G de Oliveira, Rafael Campos, Luiz Ricardo A Kiguti, Fabiano B Calmasini, Fábio H Silva, Andrew D Grant, Naoki Yoshimura, Edson Antunes
Urethral smooth muscle (USM) contributes to urinary continence by contracting during the urine storage phase, which is mainly mediated by activation of post-junctional α1-adrenoceptors. Males and females show differences in the functioning of the lower urinary tract and the most common urinary tract symptoms (LUTS). LUTS in men typically occur in association with bladder outlet obstruction, whereas in women urinary urge-incontinence symptoms are more common. Therefore, this study aimed to evaluate sex differences in α1-adrenoceptor subtype expression and their importance in proximal urethra contraction in mouse (C57BL6/J) and marmoset (Callithrix jacchus)...
March 15, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28295297/comparative-analysis-of-monoaminergic-cerebrospinal-fluid-contacting-cells-in-osteichthyes-bony-vertebrates
#13
Anna L Xavier, Romain Fontaine, Solal Bloch, Pierre Affaticati, Arnim Jenett, Michaël Demarque, Philippe Vernier, Kei Yamamoto
Cerebrospinal fluid-contacting (CSF-c) cells containing monoamines such as dopamine (DA) and serotonin (5-HT) occur in the periventricular zones of the hypothalamic region of most vertebrates except for placental mammals. Here we compare the organization of the CSF-c cells in chicken, Xenopus, and zebrafish, by analyzing the expression of synthetic enzymes of DA and 5-HT, respectively tyrosine hydroxylase (TH) and tryptophan hydroxylase (TPH), and draw an evolutionary scenario for this cell population. Due to the lack of TH immunoreactivity in this region, the hypothalamic CSF-c cells have been thought to take up DA from the ventricle instead of synthesizing it...
March 14, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28293263/saikosaponin-a-alleviates-symptoms-of-attention-deficit-hyperactivity-disorder-through-downregulation-of-dat-and-enhancing-bdnf-expression-in-spontaneous-hypertensive-rats
#14
Sun Jichao, Han Xinmin, Ren Xianguo, Yin Dongqi, Zhou Rongyi, Lei Shuang, You Yue, Song Yuchen, Ying Jingnan
The disturbed dopamine availability and brain-derived neurotrophic factor (BDNF) expression are due in part to be associated with attention deficit hyperactivity disorder (ADHD). In this study, we investigated the therapeutical effect of saikosaponin a (SSa) isolated from Bupleurum Chinese DC, against spontaneously hypertensive rat (SHR) model of ADHD. Methylphenidate and SSa were orally administered for 3 weeks. Activity was assessed by open-field test and Morris water maze test. Dopamine (DA) and BDNF were determined in specific brain regions...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28292328/age-dependent-dopamine-transporter-dysfunction-and-serine129-phospho-%C3%AE-synuclein-overload-in-g2019s-lrrk2-mice
#15
Francesco Longo, Daniela Mercatelli, Salvatore Novello, Ludovico Arcuri, Alberto Brugnoli, Fabrizio Vincenzi, Isabella Russo, Giulia Berti, Omar S Mabrouk, Robert T Kennedy, Derya R Shimshek, Katia Varani, Luigi Bubacco, Elisa Greggio, Michele Morari
Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are the most common genetic cause of Parkinson's disease. Here, we investigated whether the G2019S LRRK2 mutation causes morphological and/or functional changes at nigro-striatal dopamine neurons. Density of striatal dopaminergic terminals, nigral cell counts, tyrosine hydroxylase protein levels as well as exocytotic dopamine release measured in striatal synaptosomes, or striatal extracellular dopamine levels monitored by in vivo microdialysis were similar between ≥12-month-old G2019S knock-in mice and wild-type controls...
March 14, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28290146/cyclooxygenase-2-directs-microglial-activation-mediated-inflammation-and-oxidative-stress-leading-to-intrinsic-apoptosis-in-zn-induced-parkinsonism
#16
Amit Kumar Chauhan, Namrata Mittra, Devendra Kumar Patel, Chetna Singh
Inflammation is decisive in zinc (Zn)-induced nigrostriatal dopaminergic neurodegeneration; however, the contribution of cyclooxygenase-2 (COX-2) is not yet known. The present study aimed to explore the role of COX-2 in Zn-induced Parkinsonism and its association with the microglial activation. Male Wistar rats were treated intraperitoneally (i.p.) with Zn as zinc sulphate (20 mg/kg) along with respective controls for 2-12 weeks. In a few sets, animals were also treated with/without celecoxcib (CXB, 20 mg/kg, i...
March 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28289197/toll-pathway-is-required-for-wound-induced-expression-of-barrier-repair-genes-in-the-drosophila-epidermis
#17
Amalia Capilla, Dmitry Karachentsev, Rachel A Patterson, Anita Hermann, Michelle T Juarez, William McGinnis
The epidermis serves as a protective barrier in animals. After epidermal injury, barrier repair requires activation of many wound response genes in epidermal cells surrounding wound sites. Two such genes in Drosophila encode the enzymes dopa decarboxylase (Ddc) and tyrosine hydroxylase (ple). In this paper we explore the involvement of the Toll/NF-κB pathway in the localized activation of wound repair genes around epidermal breaks. Robust activation of wound-induced transcription from ple and Ddc requires Toll pathway components ranging from the extracellular ligand Spätzle to the Dif transcription factor...
March 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28288867/moderate-traumatic-brain-injury-increases-the-vulnerability-to-neurotoxicity-induced-by-systemic-administration-of-6-hydroxydopamine-in-mice
#18
Paulo Alexandre de Oliveira, Juliana Ben, Filipe Carvalho Matheus, Marcelo Liborio Schwarzbold, Eduardo Luiz Gasnhar Moreira, Daniel Rial, Roger Walz, Rui Daniel Prediger
Moderate traumatic brain injury (TBI) might increase the vulnerability to neuronal neurodegeneration, but the basis of such selective neuronal susceptibility has remained elusive. In keeping with the disruption of the blood-brain barrier (BBB) caused by TBI, changes in BBB permeability following brain injury could facilitate the access of xenobiotics into the brain. To test this hypothesis, here we evaluated whether TBI would increase the susceptibility of nigrostriatal dopaminergic fibers to the systemic administration of 6-hydroxydopamine (6-OHDA), a classic neurotoxin used to trigger a PD-like phenotype in mice, but that in normal conditions is unable to cross the BBB...
March 10, 2017: Brain Research
https://www.readbyqxmd.com/read/28287593/reliable-identification-of-living-dopaminergic-neurons-in-midbrain-cultures-using-rna-sequencing-and-th-promoter-driven-egfp-expression
#19
Beverley M Henley, Bruce N Cohen, Charlene H Kim, Heather D Gold, Rahul Srinivasan, Sheri McKinney, Purnima Deshpande, Henry A Lester
In Parkinson's Disease (PD) there is widespread neuronal loss throughout the brain with pronounced degeneration of dopaminergic neurons in the SNc, leading to bradykinesia, rigidity, and tremor. The identification of living dopaminergic neurons in primary Ventral Mesencephalic (VM) cultures using a fluorescent marker provides an alternative way to study the selective vulnerability of these neurons without relying on the immunostaining of fixed cells. Here, we isolate, dissociate, and culture mouse VM neurons for 3 weeks...
February 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28287127/novel-enhancement-mechanism-of-tyrosine-hydroxylase-enzymatic-activity-by-nitric-oxide-through-s-nitrosylation
#20
Yuanyuan Wang, Chun Chau Sung, Kenny K K Chung
Tyrosine hydroxylase (TH) is a rate-limiting step enzyme in the synthesis of catecholamines. Catecholamines function both as hormone and neurotransmitters in the peripheral and central nervous systems, therefore TH's expression and enzymatic activity is tightly regulated by various mechanisms. Several post-translational modifications have been shown to regulate TH's enzymatic activity such as phosphorylation, nitration and S-glutathionylation. While phosphorylation at N-terminal of TH can activate its enzymatic activity, nitration and S-glutathionylation can inactivate TH...
March 13, 2017: Scientific Reports
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