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https://www.readbyqxmd.com/read/29147666/sympathetic-denervation-accelerates-wound-contraction-but-inhibits-reepithelialization-and-pericyte-proliferation-in-diabetic-mice
#1
Zhifang Zheng, Yu Wan, Yishu Liu, Yu Yang, Jianbing Tang, Wenhua Huang, Biao Cheng
Previous studies focused on the effects of sympathetic denervation with 6-hydroxydopamine (6-OHDA) on nondiabetic wounds, but the effects of 6-OHDA on diabetic wounds have not been previously reported. In this study, treated mice received intraperitoneal 6-OHDA, and control mice received intraperitoneal injections of normal saline. Full-thickness wounds were established on the backs of mice. The wounds were sectioned (four mice per group) for analysis at 2, 5, 7, 10, 14, 17, and 21 days after injury. The wound areas in the control group were larger than those in the treatment group...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29133763/effects-of-melatonin-levels-on-neurotoxicity-of-the-medial-prefrontal-cortex-in-a-rat-model-of-parkinson-s-disease
#2
Yan Li, Shu-Mei Wang, Lei Guo, Jian Zhu, Ying Wang, Lei Li, Yan-Xin Zhao
BACKGROUND: Damage of the medial prefrontal cortex (mPFC) results in similar characteristics to the cognitive deficiency seen with the progress of Parkinson's disease (PD). Since the course of mPFC damage is still unclear, our study aimed to investigate the effects of melatonin (MT) on neurotoxicity in the mPFC of a rat model of PD. METHODS: One hundred and fifty-four normal, male Wistar rats were randomly divided into the following five groups: normal + normal saline (NS), normal + 6-hydroxydopamine (6-OHDA), sham pinealectomy (PX) + 6-OHDA, PX + 6-OHDA, and MT + 6-OHDA...
November 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29132545/nanoformulation-a-useful-therapeutic-strategy-for-improving-neuroprotection-and-the-neurorestorative-potential-in-experimental-models-of-parkinson-s-disease
#3
Jose V Lafuente, Catalina Requejo, Alejandro Carrasco, Harkaitz Bengoetxea
Parkinson's disease (PD) is the second most frequent neurodegenerative disorder, but current therapies are only symptomatic. Experimental models are necessary to go deeper in the comprehension of pathophysiological mechanism and to assess new therapeutic strategies. The unilateral 6-hydroxydopamine (6-OHDA) lesion either in medial forebrain bundle (MFB) or into the striatum in rats affords to study various stages of PD depending on the evolution time lapsed. A promising alternative to address the neurodegenerative process is the use of neurotrophic factors; but its clinical use has been limited due to its short half-life and rapid degradation after in vivo administration, along with difficulties for crossing the blood-brain barrier (BBB)...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/29128798/mechanistic-evaluation-of-neuroprotective-effect-of-estradiol-on-rotenone-and-6-ohda-induced-parkinson-s-disease
#4
Dongfang Shen, Xiaoyan Tian, Binbin Zhang, Rongrong Song
BACKGROUND: The present study was intended to investigate the protective effect of estradiol against Parkinson's disease through the use of rotenone-induced neurotoxicity model. METHODS: To define the effect on the behavioral function, Tail suspension test, morris water maize test and cylinder tests were performed. Several biochemical and histological markers related to Parkinson's disease was determined in animal and cell culture models. To evaluate the effect of estradiol on the cellular architecture in rotenone-induced brain tissue, the histopathological examination was carried out by using Haemotoxylin and Eosin staining...
July 8, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29126889/impaired-glutamatergic-projection-from-the-motor-cortex-to-the-subthalamic-nucleus-in-6-hydroxydopamine-lesioned-hemi-parkinsonian-rats
#5
Yan-Yan Wang, Yong Wang, Hai-Fei Jiang, Jun-Hua Liu, Jun Jia, Ke Wang, Fei Zhao, Min-Hua Luo, Min-Min Luo, Xiao-Min Wang
The glutamatergic projection from the motor cortex to the subthalamic nucleus (STN) constitutes the cortico-basal ganglia circuit and plays a critical role in the control of movement. Emerging evidence shows that the cortico-STN pathway is susceptible to dopamine depletion. Specifically in Parkinson's disease (PD), abnormal electrophysiological activities were observed in the motor cortex and STN, while the STN serves as a key target of deep brain stimulation for PD therapy. However, direct morphological changes in the cortico-STN connectivity in response to PD progress are poorly understood at present...
November 8, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29115484/lipoic-acid-alleviates-l%C3%A2-dopa%C3%A2-induced-dyskinesia-in-6%C3%A2-ohda-parkinsonian-rats-via-anti%C3%A2-oxidative-stress
#6
Su-Fang Zhang, Cheng-Long Xie, Jing-Ya Lin, Mei-Hua Wang, Xi-Jin Wang, Zhen-Guo Liu
Levodopa (L‑DOPA) is the gold standard for symptomatic treatment of Parkinson's disease (PD); however, long‑term therapy is associated with the emergence of L‑DOPA‑induced dyskinesia (LID). Nigral dopaminergic cell loss determines the degree of drug exposure and time required for the initial onset of LID. Accumulating evidence indicates that α‑lipoic acid (ALA) decreases this nigral dopaminergic cell loss. However, until now, the precise mechanisms of ALA have only been partially understood in LID...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29107062/the-anti-aging-protein-klotho-alleviates-injury-of-nigrostriatal-dopaminergic-pathway-in-6-hydroxydopamine-rat-model-of-parkinson-s-disease-involvement-of-pka-camkii-creb-signaling
#7
Tourandokht Baluchnejadmojarad, Seyed-Mohammad Eftekhari, Nida Jamali-Raeufy, Sobhan Haghani, Hossein Zeinali, Mehrdad Roghani
Parkinson's disease (PD) is a prevalent movement disorder in the elderly. PD is hallmarked with progressive deterioration of mesencephalic dopaminergic neurons and development of debilitating motor and non-motor clinical symptoms. Klotho protein is the product of an aging-suppressor gene that its overexpression could protect neurons against oxidative injury. This study was undertaken to explore whether exogenous klotho could alleviate injury of nigrostriatal dopaminergic pathway in 6-hydroxydopamine (6-OHDA) rat model of PD...
October 31, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29103154/evidence-for-cross-hemispheric-preconditioning-in-experimental-parkinson-s-disease
#8
Justin N Weilnau, Michael A Carcella, Kristin M Miner, Tarun N Bhatia, Daniel F Hutchison, Deepti B Pant, Negin Nouraei, Rehana K Leak
Dopamine loss and motor deficits in Parkinson's disease typically commence unilaterally and remain asymmetric for many years, raising the possibility that endogenous defenses slow the cross-hemispheric transmission of pathology. It is well-established that the biological response to subtoxic stress prepares cells to survive subsequent toxic challenges, a phenomenon known as preconditioning, tolerance, or stress adaptation. Here we demonstrate that unilateral striatal infusions of the oxidative toxicant 6-hydroxydopamine (6-OHDA) precondition the contralateral nigrostriatal pathway against the toxicity of a second 6-OHDA infusion in the opposite hemisphere...
November 4, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/29099404/differential-effects-of-dopaminergic-drugs-on-spontaneous-motor-activity-in-the-common-marmoset-following-pretreatment-with-a-bilateral-brain-infusion-of-6-hydroxydopamine
#9
Kiyoshi Ando, Chiyoko Nishime, Ryo Inoue, Eiko Nishinaka, Kenji Kawai, Koji Urano, Hideki Tsutsumi
The differential effects of dopaminergic drugs with different pharmacological profiles were investigated with respect to spontaneous motor activity in the common marmoset following pretreatment with a bilateral brain infusion of 6-hydroxydopamine (6-OHDA). Three marmosets received infusions of 6-OHDA (either 30 or 40 μg/side) into the bilateral dopamine-rich area running from the substantia nigra to the striatum. The motor activity of the 6-OHDA marmosets was compared with that of three intact marmosets...
December 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/29097596/ck2-oppositely-modulates-l-dopa-induced-dyskinesia-via-striatal-projection-neurons-expressing-d1-or-d2-receptors
#10
Marisol Cortés, Lauren Malave, Julia Castello, Marc Flajolet, M Angela Cenci, Eitan Friedman, Heike Rebholz
We have previously shown that casein kinase 2 (CK2) negatively regulates dopamine D1- and adenosine A2a receptor signaling in the striatum. Ablation of CK2 in D1-receptor-positive striatal neurons caused enhanced locomotion and exploration at baseline, whereas CK2 ablation in D2 receptor-positive neurons caused increased locomotion after treatment with A2a antagonist, caffeine. Since both, D1 and A2a receptors, play major roles in the cellular responses to L-DOPA in the striatum, these findings prompted us to examine the impact of CK2 ablation on the effects of L-DOPA treatment in the unilateral 6-OHDA lesioned mouse model of Parkinson's disease...
November 2, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29093677/levodopa-benserazide-loaded-microspheres-alleviate-l-dopa-induced-dyskinesia-through-preventing-the-over-expression-of-d1r-shp-2-erk1-2-signaling-pathway-in-a-rat-model-of-parkinson-s-disease
#11
Ying Wan, Na Wu, Lu Song, Xijin Wang, Zhenguo Liu, Weien Yuan, Jing Gan
Background: The long-term intermittent Levodopa (L-dopa) stimulation contributes to an aberrant activation of D1 receptor (D1R) mediated extracellular signal-regulated kinases1/2 (ERK1/2) in the striatal medium spiny neurons, resulting in the occurrence of L-dopa induced dyskinesia (LID). Recently, a novel signaling pathway, D1R/Shp-2/ERK1/2, was proposed to be required for the occurrence of LID. Here we designed the study in which two different methods of L-dopa delivery [continuous dopamine stimulation (CDS) vs...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29089232/acacetin-inhibits-neuronal-cell-death-induced-by-6-hydroxydopamine-in-cellular-parkinson-s-disease-model
#12
Sang Min Kim, Yong Joo Park, Myoung-Sook Shin, Ha-Ryong Kim, Min Jae Kim, Sang Hun Lee, Seung Pil Yun, Seung-Hwan Kwon
Acacetin (5,7-dihydroxy-4'-methoxyflavone), a flavonoid compound isolated from Flos Chrysanthemi Indici, chrysanthemum, safflower, and Calamintha and Linaria species has been shown to have anti-cancer activity, indicating its potential clinical value in cancer treatment. In this study, we sought to study the potentials of acacetin in preventing human dopaminergic neuronal death via inhibition of 6-hydroxydopamine (6-OHDA)-induced neuronal cell death in the SH-SY5Y cells. Our results suggest that acacetin was effective in preventing 6-OHDA-induced neuronal cell death through regulation of mitochondrial-mediated cascade apoptotic cell death...
October 20, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29082467/let-7d-microrna-attenuates-6-ohda-induced-injury-by-targeting-caspase-3-in-mn9d-cells
#13
Li Li, Hui Liu, Haijing Song, Yingsong Qin, Ying Wang, Ming Xu, Chaoxia Liu, Jin Gao, Shen Sun
Parkinson's disease (PD) mainly results from the progressive loss of dopaminergic (DA) neurons in the substantia nigra pars compacta (SNpc), and the exact underlying mechanisms of the loss of DA neurons in PD remains largely unclear. The results of our previous work showed that let-7d was significantly downregulated in a 6-OHDA-induced cellular model of PD. However, the exact effect of let-7d on DA neural cells was unclear. In MN9D dopaminergic neuronal cells, we used a let-7d mimic and inhibitor to upregulate and downregulate the expression of let-7d, respectively, a cell counting kit to assess cell viability, and a TUNEL staining assay and flow cytometry to examine the cell death rate, and we found that let-7d could negatively regulate 6-OHDA-induced cell injury...
October 29, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/29079356/parkin-overexpression-in-human-mesenchymal-stromal-cells-from-wharton-s-jelly-suppresses-6-hydroxydopamine-induced-apoptosis-potential-therapeutic-strategy-in-parkinson-s-disease
#14
A R Bonilla-Porras, A Arevalo-Arbelaez, J F Alzate-Restrepo, C Velez-Pardo, M Jimenez-Del-Rio
BACKGROUND AIMS: Stem cell transplantation is an excellent option for regenerative or replacement therapy. However, deleterious microenvironmental and endogenous factors (e.g., oxidative stress) compromise ongoing graft survival and longevity. Therefore, (transient or stable) genetically modified cells may be reasonably thought to resist oxidative stress-induced damage. Genetic engineering of mesenchymal stromal cells (MSCs) obtained from Wharton's jelly tissue may offer some therapeutic potential...
October 24, 2017: Cytotherapy
https://www.readbyqxmd.com/read/29079145/nrf2-mediated-neuroprotection-by-manf-against-6-ohda-induced-cell-damage-via-pi3k-akt-gsk3%C3%AE-pathway
#15
Jingxing Zhang, Weifang Tong, Hui Sun, Ming Jiang, Yijue Shen, Yigang Liu, Hua Gu, Jia Guo, Jianmin Fang, Lingjing Jin
Oxidative stress and apoptosis are thought to be broadly involved in the pathogenesis of Parkinson's disease. We previously reported that Mesencephalic astrocyte-derived neurotrophic factor (MANF) possesses anti-oxidation and anti-apoptotic effects against 6-OHDA-induced neurotoxicity, but the specific molecular mechanism remains unclear. In this study, we showed that MANF up-regulates the expression of nuclear factor erythroid 2-related factor (Nrf2) and promotes its translocation into the nucleus. The anti-oxidation and anti-apoptotic effects of MANF could be partially blocked by inhibitor or shRNA-mediated knockdown of Nrf2...
October 25, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29079063/neuroprotective-and-neuro-restorative-effects-of-minocycline-and-rasagiline-in-a-zebrafish-6-hydroxydopamine-model-of-parkinson-s-disease
#16
Aileen Cronin, Maura Grealy
Parkinson's disease is a common, debilitating, neurodegenerative disorder for which the current gold standard treatment, levodopa (L-DOPA) is symptomatic. There is an urgent, unmet need for neuroprotective or, ideally, neuro-restorative drugs. We describe a 6-hydroxydopamine (6-OHDA) zebrafish model to screen drugs for neuroprotective and neuro-restorative capacity. Zebrafish larvae at two days post fertilization were exposed to 6-OHDA for three days, with co-administration of test drugs for neuroprotection experiments, or for 32 h, with subsequent treatment with test drugs for neuro-restoration experiments...
October 24, 2017: Neuroscience
https://www.readbyqxmd.com/read/29076060/multiple-administration-of-endogenous-amines-tiq-and-1metiq-protects-against-a-6-ohda-induced-essential-fall-of-dopamine-release-in-the-rat-striatum-in-vivo-microdialysis-study
#17
Agnieszka Wąsik, Irena Romańska, Agnieszka Zelek-Molik, Lucyna Antkiewicz-Michaluk
Parkinson's disease (PD) represents one of the neurodegenerative disorders which are caused by degeneration of dopaminergic neurons in the nigrostriatal pathway. Different toxins, e.g., 6-hydroxydopamine (6-OHDA), are used to model PD in animals. 6-OHDA is a neurotoxin which damages catecholaminergic neurons via production of oxygen radicals. Tetrahydroisoquinolines (TIQs) are endogenous amines which are present in the mammalian brain. Some of them, like TIQ and 1-methyl-1,2,3,4-tetrahydroisoquinoline (1MeTIQ), demonstrate neuroprotective properties...
October 26, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/29071217/modafinil-improves-catalepsy-in-a-rat-6-hydroxydopamine-model-of-parkinson-s-disease-possible-involvement-of-dopaminergic-neurotransmission
#18
Reza Vajdi-Hokmabad, Mojtaba Ziaee, Saeed Sadigh-Eteghad, Siamak Sandoghchian Shotorbani, Javad Mahmoudi
Purpose: Modafinil is a vigilance-enhancing drug licensed for narcolepsy. The use of modafinil leads to various neuromodulatory effects with very low abuse potential. A body of evidence suggested that modafinil may have anti-parkinsonian effects. This study was designed to evaluate whether modafinil could improve motor dysfunction in the 6-hydroxydopamine (6-OHDA)-induced rat model of Parkinson's disease. Methods: Male Wistar rats (180-220 g, n= 98) were used in this study. Parkinsonism was induced by injection of 6-hydroxydopamine (10 μg/2μl in 0...
September 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29069652/protective-effect-of-curcumin-against-oxidative-stress-induced-injury-in-rats-with-parkinson-s-disease-through-the-wnt-%C3%AE-catenin-signaling-pathway
#19
Yun-Liang Wang, Bo Ju, Yu-Zhen Zhang, Hong-Lei Yin, Ya-Jun Liu, Shan-Shan Wang, Zhi-Lei Zeng, Xiao-Peng Yang, Hai-Tao Wang, Jin-Feng Li
BACKGROUND/AIMS: The study aimed to investigate the protective effect of curcumin against oxidative stress-induced injury of Parkinson's disease (PD) through the Wnt/β-catenin signaling pathway in rats. METHODS: The successfully established PD rat models and normal healthy rats were randomly assigned into the 6-hydroxydopamine (6-OHDA), the curcumin (Cur) and the control groups. Immunohistochemistry was used to detect the positive expression of tyrosine hydroxylase (TH), dopamine transporter (DAT) and glial fibrillary acidic protein (GFAP)...
October 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29064842/effect-of-varenicline-on-behavioral-deficits-in-a-rat-model-of-parkinson-s-disease-induced-by-unilateral-6-hydroxydopamine-lesion-of-substantia-nigra
#20
Rüyal Tan, Funda Bölükbaşi Hatip, Öznur Açikalin, Atsushi Yamauchi, Yasufumi Kataoka, Izzettin Hatip-Al-Khatib
Nicotinic acetylcholine receptors (nAChRs) are implicated in the pathogenesis of Parkinson's disease (PD). Varenicline tartrate is a partial agonist at α4β2 and full agonist at α7 neuronal nAChR subunits. A unilateral lesion of the substantia nigra (SN) has been used as a reliable model of PD. This study aimed to investigate the effect of varenicline on locomotor and nonlocomotor behavioral deficits induced by a unilateral lesion of the SN induced by 6-hydroxydopamine (6-OHDA) (8 µg/4 µl). Varenicline (1 mg/kg) was administered to the lesioned rats daily for 2 weeks, which commenced 3 weeks after 6-OHDA administration...
October 23, 2017: Behavioural Pharmacology
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