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Drug induced parkinsonism

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https://www.readbyqxmd.com/read/28820437/are-astrocytes-the-predominant-cell-type-for-activation-of-nrf2-in-aging-and-neurodegeneration
#1
REVIEW
Jeffrey R Liddell
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor that regulates hundreds of antioxidant genes, and is activated in response to oxidative stress. Given that many neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, Huntington's disease and multiple sclerosis are characterised by oxidative stress, Nrf2 is commonly activated in these diseases. Evidence demonstrates that Nrf2 activity is repressed in neurons in vitro, and only cultured astrocytes respond strongly to Nrf2 inducers, leading to the interpretation that Nrf2 signalling is largely restricted to astrocytes...
August 18, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28818104/neuroprotective-properties-of-curcumin-in-toxin-base-animal-models-of-parkinson-s-disease-a-systematic-experiment-literatures-review
#2
Xin-Shi Wang, Zeng-Rui Zhang, Man-Man Zhang, Miao-Xuan Sun, Wen-Wen Wang, Cheng-Long Xie
BACKGROUND: Curcumin (diferuloylmethane), a polyphenol extracted from the plant Curcuma longa, is widely used in Southeast Asia, China and India in food preparation and for medicinal purposes. Meanwhile, the neuroprotective actions of curcumin have been documented for experimental therapy in Parkinson's disease (PD). METHODS: In this study, we used a systematic review to comprehensively assess the efficacy of curcumin in experimental PD. Using electronic and manual search for the literatures, we identified studies describing the efficacy of curcumin in animal models of PD...
August 17, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28807678/metformin-lowers-%C3%AE-synuclein-phosphorylation-and-upregulates-neurotrophic-factor-in-the-mptp-mouse-model-of-parkinson-s-disease
#3
Nikita Katila, Sunil Bhurtel, Sina Shadfar, Sunil Srivastav, Sabita Neupane, Uttam Ojha, Gil-Saeng Jeong, Dong-Young Choi
In spite of the massive research for the identification of neurorestorative or neuroprotective intervention for curing Parkinson's disease (PD), there is still lack of clinically proven neuroprotective agents. Metformin, a common anti-hyperglycemic drug has been known to possess neuroprotective properties. However, specific mechanisms by which metformin protects neurons from 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) neurotoxicity remain to be elucidated. In this study, we assessed the neuroprotective effects of metformin in the subchronic MPTP model of PD, and explored its feasible mechanisms for neuroprotection...
August 11, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28807675/substantial-protection-against-mptp-associated-parkinson-s-neurotoxicity-in-vitro-and-in-vivo-by-anti-cancer-agent-su4312-via-activation-of-mef2d-and-inhibition-of-mao-b
#4
Baojian Guo, Shengquan Hu, Chengyou Zheng, Hongyu Wang, Fangcheng Luo, Haitao Li, Wei Cui, Xifei Yang, Guozhen Cui, Shinghung Mak, Tony Chung-Lit Choi, Edmond Dik-Lung Ma, Yuqiang Wang, Simon Ming Yuen Lee, Zaijun Zhang, Yifan Han
We have previously demonstrated the unexpected neuroprotection of the anti-cancer agent SU4312 in cellular models associated with Parkinson's disease (PD). However, the precise mechanisms underlying its neuroprotection are still unknown, and the effects of SU4312 on rodent models of PD have not been characterized. In the current study, we found that the protection of SU4312 against 1-methyl-4-phenylpyridinium ion (MPP(+))-induced neurotoxicity in PC12 cells was achieved through the activation of transcription factor myocyte enhancer factor 2D (MEF2D), as evidenced by the fact that SU4312 stimulated myocyte enhancer factor 2 (MEF2) transcriptional activity and prevented the inhibition of MEF2D protein expression caused by MPP(+), and that short hairpin RNA (ShRNA)-mediated knockdown of MEF2D significantly abolished the neuroprotection of SU4312...
August 11, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28805574/nonmotor-symptoms-in-vascular-and-other-secondary-parkinsonism
#5
Oleg S Levin, Achcha Sh Chimagomedova, Natalia A Skripkina, Elena A Lyashenko, Olga V Babkina
Vascular parkinsonism (VP) is a relatively frequent variant of secondary parkinsonism caused by ischemic or hemorrhagic lesions of basal ganglia, midbrain, or their links with frontal cortex. According to different investigations, various forms of cerebrovascular disease cause 1%-15% of parkinsonism cases. Nonmotor symptoms are frequently found in VP and may negatively influence on quality of life. However, nonmotor symptoms such as hallucinations, orthostatic hypotension, REM-sleep behavior disorder, and anosmia are rarely revealed in VP, which may be noted to another diagnosis or mixed pathology...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28798236/the-unintended-mitochondrial-uncoupling-effects-of-the-fda-approved-anti-helminth-drug-nitazoxanide-mitigates-experimental-parkinsonism-in-mice
#6
Niharika Amireddy, Srinivas N Puttapaka, Ravali L Vinnakota, Halley G Ravuri, Swaroop Thonda, Shasi V Kalivendi
Mitochondria plays a primary role in the pathophysiology of Parkinson's disease (PD) and small molecules that counteract the initial stages of disease may offer therapeutic benefit. In this regard, we have examined whether the off-target effects of the FDA approved anti-helminth drug, nitazoxanide (NTZ) on mitochondrial respiration could possess any therapeutic potential for PD. Results indicate that MPP(+) induced loss in oxygen consumption rate (OCR) and ATP production by mitochondria were ameliorated by NTZ in real-time by virtue of its mild-uncoupling effect...
August 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28792609/egcg-attenuates-fe-iii-induced-conformational-transition-of-%C3%AE-synuclein-and-protects-as-pc12-cells-against-fe-iii-induced-death
#7
Juan Zhao, Lihui Xu, Qingnan Liang, Qing Sun, Congheng Chen, Yuan Zhang, Yu Ding, Ping Zhou
The fibrillation and aggregation of α-synuclein (AS), along with the conformational transition from random coil to β-sheet, are the critical steps in the development of Parkinson's disease (PD). It is acknowledged that iron accumulation in the brain may lead to the fibrillation of AS. However, (-)-epigallocatechin gallate (EGCG) can penetrate the blood-brain barrier, chelate metal ions and inhibit the fibrillation of amyloid proteins. Therefore, EGCG is warranted to be investigated for its potential to cure amyloid-related diseases...
August 9, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28782388/nanotechnology-based-drug-delivery-of-ropinirole-for-parkinson-s-disease
#8
Emilia Barcia, Liudmila Boeva, Luis García-García, Karla Slowing, Ana Fernández-Carballido, Yaquelyn Casanova, Sofía Negro
A new drug delivery system is developed for ropinirole (RP) for the treatment of Parkinson's disease (PD) consisting of biodegradable poly (D,L-lactide-co-glycolide) (PLGA) nanoparticles (NPs). The formulation selected was prepared with 8 mg RP and 50 mg PLGA 502. This formulation exhibited mean encapsulation efficiency of 74.8 ± 8.2%, mean particle size lower than 155 nm, the zeta potential of -14.25 ± 0.43 mV and zero-order in vitro release of RP (14.13 ± 0.17 μg/h/10 mg NPs) for 5 d...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28770951/microrna-181c-functions-as-a-protective-factor-in-a-1-methyl-4-phenylpyridinium-iodide-induced-cellular-parkinson-s-disease-model-via-bcl2l11
#9
M Wei, L-J Cao, J-L Zheng, L-J Xue, B Chen, F Xiao, C-S Xu
OBJECTIVE: Parkinson is one of the most common neurodegenerative diseases. At present, many studies have pointed out that miRNAs play a very important role in Parkinson's development and process. MiR-181c has been shown to have a significant low expression in blood samples and brain tissues of Parkinson's patients. MATERIALS AND METHODS: We used 1-Methyl-4-Phenylpyridinium Iodide (MPP(+)) as a tool for constructing the Parkinson's cell model, using mir181c mimics to construct an experimental model of acquisition...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28770670/potential-repositioning-of-exemestane-as-a-neuroprotective-agent-for-parkinson-s-disease
#10
Hyo Jin Son, Se Hee Han, Ji Ae Lee, Eun Jung Shin, Onyou Hwang
Parkinson's disease (PD) is a neurodegenerative disorder characterised by selective degeneration of the nigral dopaminergic neurons, and neuroinflammation and oxidative stress are believed to be involved in its pathogenesis. In the present study, we provide data that the synthetic steroid exemestane, which is currently being used to treat breast cancer, may be useful for PD therapy. In BV-2 microglial cells, exemestane activated the transcription factor Nrf2 and induced expression of the Nrf2-dependent genes that encode the antioxidant enzymes NAD(P)H: quinone oxidoreductase 1, haem oxygenase-1, and glutamylcysteine ligase...
June 2017: Free Radical Research
https://www.readbyqxmd.com/read/28758631/statins-are-ineffective-at-reducing-neuroinflammation-or-prolonging-survival-in-scrapie-infected-mice
#11
James A Carroll, Brent Race, Katie Phillips, James F Striebel, Bruce Chesebro
Neuroinflammation is a prominent component of several neurodegenerative diseases, including multiple sclerosis, Alzheimer's disease, Parkinson's disease, tauopathies, amyotrophic lateral sclerosis and prion diseases. In such conditions, the ability to decrease neuroinflammation by drug therapy may influence disease progression. Statins have been used to treat hyperlipidemia as well as reduce neuroinflammation and oxidative stress in various tissues. In previous studies, treatment of scrapie-infected mice with the type 1 statins, simvastatin or pravastatin, showed a small beneficial effect on survival time...
July 31, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28752417/metformin-alleviated-the-neuronal-oxidative-stress-in-hippocampus-of-rats-under-single-prolonged-stress
#12
Jiangang Wang, Bing Xiao, Fang Han, Yuxiu Shi
In an animal model of post-traumatic stress disorder (PTSD), our previous studies showed mitochondrial stress-induced apoptosis in the hippocampus. Metformin, the most commonly prescribed anti-diabetic drug, exerts its effects through 5'-adenosine monophosphate-activated protein kinase (AMPK) activation. It was shown that a neuroprotective role was gradually established against stroke, spinal cord injury and Parkinson's disease. The aim of this study was to explore the role of the AMPK pathway in neuronal apoptosis in the hippocampus using a rat model of PTSD...
July 27, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28748860/current-nondopaminergic-therapeutic-options-for-motor-symptoms-of-parkinson-s-disease
#13
REVIEW
Juan-Juan Du, Sheng-Di Chen
OBJECTIVE: The aim of this study was to summarize recent studies on nondopaminergic options for the treatment of motor symptoms in Parkinson's disease (PD). DATA SOURCES: Papers in English published in PubMed, Cochrane, and Ovid Nursing databases between January 1988 and November 2016 were searched using the following keywords: PD, nondopaminergic therapy, adenosine, glutamatergic, adrenergic, serotoninergic, histaminic, and iron chelator. We also reviewed the ongoing clinical trials in the website of clinicaltrials...
August 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28748763/induced-pluripotent-stem-cell-technology-a-paradigm-shift-in-medical-science-for-drug-screening-and-disease-modeling
#14
Meera Nair, Sardul Singh Sandhu, Anil Kumar Sharma
BACKGROUND: Induced Pluripotent Stem Cell (IPSC) Technology is the most advanced research as it offers an attractive alternative for establishing patient-specific IPSCs to recapitulate phenotypes of not only monogenic diseases (viz. Thalassaemia, Sickle cell anemia, Haemophilia, Tay-Sachs disease), but also late-onset polygenic diseases (viz. Parkinson's disease, Alzheimer's disease, schizophrenia). Over the hindsight, numerous studies of the past and current scientists have led to the production, maturation and understanding of induced pluripotent stem cell technology and its use in basic and clinical research...
July 27, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28739086/a-preclinical-study-on-the-combined-effects-of-repeated-eltoprazine-and-preladenant-treatment-for-alleviating-l-dopa-induced-dyskinesia-in-parkinson-s-disease
#15
Wai Kin D Ko, Qin Li, Long Yun Cheng, Micaela Morelli, Manolo Carta, Erwan Bezard
Eltoprazine, a serotonergic (5-HT)1A/B receptor agonist, is a potential treatment for L-DOPA-induced dyskinesia (LID) in Parkinson's disease (PD) but notably compromises the anti-parkinsonian effects of L-DOPA, as seen in rodent and monkey models of PD. Preladenant, a selective adenosine A2a receptor antagonist, mediates modest anti-parkinsonian effects in parkinsonian monkeys. In a recent investigation, combined eltoprazine and preladenant treatment with a sub-threshold dose of L-DOPA acutely attenuated dyskinesia without exacerbating PD disability in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated macaques...
July 21, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28737225/psychostimulant-effect-of-dopaminergic-treatment-and-addictions-in-parkinson-s-disease
#16
Benoit Delpont, Eugénie Lhommée, Hélène Klinger, Emmanuelle Schmitt, Amélie Bichon, Valérie Fraix, Anna Castrioto, Jean-Louis Quesada, Pierre Pélissier, Andrea Kistner, Sébastien Carnicella, Christian Lüscher, Emmanuel Broussolle, Pierre Pollak, Stéphane Thobois, Paul Krack
BACKGROUND: Dopamine replacement therapy in PD has been associated with both behavioral addictions and dopamine addiction. OBJECTIVES: To investigate potential association between l-dopa induced neuropsychiatric fluctuations and addictions in PD. METHODS: A cohort of 102 patients with PD suffering from motor complications of l-dopa treatment was prospectively analyzed. We evaluated dopamine addiction, behavioral addictions, and neuropsychiatric fluctuations using the Ardouin scale of behavior in PD...
July 24, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28700507/pramipexole-induced-limb-dystonia-and-its-associated-complex-regional-pain-syndrome-in-idiopathic-parkinson-s-disease-a-case-report
#17
Donghwi Park
RATIONALE: This case may be due to basal ganglia dysfunction, which was probably caused by abnormal activation of dopamine 1-like receptor (D1R) boosted by pramipexole binding on dopamine 3-like receptor (D3R) in a situation where D3R was overexpressed by the chronic treatment of L-dopa. PATIENT CONCERNS: Striatal hand and foot deformities. DIAGNOSES: Striatal hand and foot deformities with CRPS. INTERVENTIONS: Steroid treatemnt and withdrawal of the pramipexole...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28697377/absence-of-regulator-of-g-protein-signaling-4-does-not-protect-against-dopamine-neuron-dysfunction-and-injury-in-the-mouse-6-hydroxydopamine-lesion-model-of-parkinson-s-disease
#18
Amer Ashrafi, Pierre Garcia, Heike Kollmus, Klaus Schughart, Antonio Del Sol, Manuel Buttini, Enrico Glaab
Regulator of G-protein signaling 4 (RGS4), a member of the RGS family of proteins that inactivate G-proteins, has gained interest as a potential drug target for neurological disorders, such as epilepsy and Parkinson's disease (PD). In the case of PD, the main current options for alleviating motor symptoms are dopamine replacement therapies, which have limitations because of side effects and reduced effectiveness over the long term. Research on new nondopaminergic PD drug targets has indicated that inhibition of RGS4 could be an effective adjuvant treatment option...
June 19, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28697282/exploring-the-potential-of-natural-and-synthetic-neuroprotective-steroids-against-neurodegenerative-disorders-a-literature-review
#19
REVIEW
Ranju Bansal, Ranjit Singh
Neurodegeneration is a complex process, which leads to progressive brain damage due to loss of neurons. Despite exhaustive research, the cause of neuronal loss in various degenerative disorders is not entirely understood. Neuroprotective steroids constitute an important line of attack, which could play a major role against the common mechanisms associated with various neurodegenerative disorders like Alzheimer's disease, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis. Natural endogenous steroids induce the neuroprotection by protecting the nerve cells from neuronal injury through multiple mechanisms, therefore the structural modifications of the endogenous steroids could be helpful in the generation of new therapeutically useful neuroprotective agents...
July 11, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/28694175/daily-consumption-of-methylene-blue-reduces-attentional-deficits-and-dopamine-reduction-in-a-6-ohda-model-of-parkinson-s-disease
#20
Elizabeth S Smith, Madeline E Clark, Gwendolyn A Hardy, David J Kraan, Elisa Biondo, F Gonzalez-Lima, Lawrence K Cormack, Marie Monfils, Hongjoo J Lee
Recently, alternative drug therapies for Parkinson's disease (PD) have been investigated as there are many shortcomings of traditional dopamine-based therapies including difficulties in treating cognitive and attentional dysfunction. A promising therapeutic avenue is to target mitochondrial dysfunction and oxidative stress in PD. One option might be the use of methylene blue (MB), an antioxidant and metabolic enhancer. MB has been shown to improve cognitive function in both intact rodents and rodent disease models...
July 8, 2017: Neuroscience
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