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https://www.readbyqxmd.com/read/28320892/sepiapterin-reductase-gene-disrupted-mice-suffer-from-hypertension-with-fluctuation-and-bradycardia
#1
Chiho Sumi-Ichinose, Yui Suganuma, Taiki Kano, Noriko Ihira, Hiroko Nomura, Kazuhisa Ikemoto, Tadayoshi Hata, Setsuko Katoh, Hiroshi Ichinose, Kazunao Kondo
(6R)-l-erythro-5,6,7,8-Tetrahydrobiopterin (BH4) is an essential cofactor for monoamine and nitric oxide (NO) production. Sepiapterin reductase (SPR) catalyzes the final step in BH4 biosynthesis. We analyzed the cardiovascular function of adult Spr gene-disrupted (Spr(-/-)) mice for the first time. After weaning, Spr(-/-) mice suffered from hypertension with fluctuation and bradycardia, while the monoamine contents in these mice were less than 10% of those in the wild-type mice as a result of BH4 depletion...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28315845/icarus-study-prevalence-and-clinical-features-of-impulse-control-disorders-in-parkinson-s-disease
#2
Angelo Antonini, Paolo Barone, Ubaldo Bonuccelli, Karin Annoni, Mahnaz Asgharnejad, Paolo Stanzione
BACKGROUND: Impulse control disorders/other compulsive behaviours ('ICD behaviours') occur in Parkinson's disease (PD), but prospective studies are scarce, and prevalence and clinical characteristics of patients are insufficiently defined. OBJECTIVES: To assess the presence of ICD behaviours over a 2-year period, and evaluate patients' clinical characteristics. METHODS: A prospective, non-interventional, multicentre study (ICARUS (Impulse Control disorders And the association of neuRopsychiatric symptoms, cognition and qUality of life in ParkinSon disease); SP0990) in treated Italian PD outpatients...
April 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28289399/auditory-and-vestibular-evoked-potentials-correlate-with-motor-and-non-motor-features-of-parkinson-s-disease
#3
Ali Soliman Shalash, Dalia Mohamed Hassan, Hanan Hani Elrassas, Mohamed Mosaad Salama, Edna Méndez-Hernández, José M Salas-Pacheco, Oscar Arias-Carrión
Degeneration of several brainstem nuclei has been long related to motor and non-motor symptoms (NMSs) of Parkinson's disease (PD). Nevertheless, due to technical issues, there are only a few studies that correlate that association. Brainstem auditory-evoked potential (BAEP) and vestibular-evoked myogenic potential (VEMP) responses represent a valuable tool for brainstem assessment. Here, we investigated the abnormalities of BAEPs, ocular VEMPs (oVEMPs), and cervical VEMPs (cVEMPs) in patients with PD and its correlation to the motor and NMSs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28229895/impulse-control-disorders-and-levodopa-induced-dyskinesias-in-parkinson-s-disease-an-update
#4
REVIEW
Valerie Voon, T Celeste Napier, Michael J Frank, Veronique Sgambato-Faure, Anthony A Grace, Maria Rodriguez-Oroz, Jose Obeso, Erwan Bezard, Pierre-Olivier Fernagut
Dopaminergic medications used in the treatment of patients with Parkinson's disease are associated with motor and non-motor behavioural side-effects, such as dyskinesias and impulse control disorders also known as behavioural addictions. Levodopa-induced dyskinesias occur in up to 80% of patients with Parkinson's after a few years of chronic treatment. Impulse control disorders, including gambling disorder, binge eating disorder, compulsive sexual behaviour, and compulsive shopping occur in about 17% of patients with Parkinson's disease on dopamine agonists...
March 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28203083/sexual-dimorphism-in-parkinson-s-disease-differences-in-clinical-manifestations-quality-of-life-and-psychosocial-functioning-between-males-and-females
#5
Farzaneh Farhadi, Kia Vosoughi, Gholam Ali Shahidi, Ahmad Delbari, Johan Lökk, Seyed-Mohammad Fereshtehnejad
INTRODUCTION: Sex-related differences in clinical manifestations and consequences of Parkinson's disease (PD) have been poorly explored. Better understanding of sexual dimorphism in neurologic diseases such as PD has been announced as a research priority. The aim of our study was to determine independent sex differences in clinical manifestations and subtypes, psychosocial functioning, quality of life (QoL) and its domains between male and female individuals with PD. PATIENTS AND METHODS: A comprehensive list of demographics, motor symptoms and subtypes, nonmotor features, health-related quality of life (HRQoL), psychosocial functioning and general aspects of daily life was assessed in 157 individuals (108 males and 49 females) with idiopathic PD...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28190476/neuroprotective-properties-of-icariin-in-mptp-induced-mouse-model-of-parkinson-s-disease-involvement-of-pi3k-akt-and-mek-erk-signaling-pathways
#6
Wen-Fang Chen, Lin Wu, Zhong-Rui Du, Lei Chen, Ai-Li Xu, Xiao-Han Chen, Ji-Jun Teng, Man-Sau Wong
BACKGROUND: Epimedium sagittatum is a traditional Chinese herb normally which is used to treat the osteoporosis, cardiovascular dysfunction, and to improve neurological and sexual function in China, Korea and Japan. Icariin is the major active ingredient in Epimedium sagittatum. In the present research, we examined the neuroprotective effects of icariin on dopaminergic neurons and the possible mechanisms in a mouse model of Parkinson's disease (PD). METHODS: Ovariectomized PD mice were treated with vehicle or icariin (3 days before MPTP injections) with or without the phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002 or mitogen-activated protein kinase kinase (MEK) inhibitor PD98059...
February 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28028676/impact-of-autonomic-dysfunctions-on-the-quality-of-life-in-parkinson-s-disease-patients
#7
Svetlana Tomic, Ines Rajkovaca, Vlasta Pekic, Tamer Salha, Sanja Misevic
Autonomic dysfunctions are part of a spectrum of non-motor symptoms in Parkinson's disease (PD) patients. The aim of the study was to assess the prevalence of autonomic dysfunctions and their influence on the quality of life (QoL) in PD patients, adjusted for age, sex, disease duration and motor symptoms. Patients were evaluated for motor function (Unified Parkinson's Disease Rating Scale, UPDRS part III), disease stage (Hoehn and Yahr scale, H&Y scale), autonomic dysfunction (Scales for Outcomes in Parkinson's disease, Autonomic, SCOPA-AUT) and QoL (Parkinson's Disease Questionnaire-39, PDQ-39)...
March 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28025041/effect-of-lps-treatment-on-tyrosine-hydroxylase-expression-and-parkinson-like-behaviors
#8
Olivier Girard-Joyal, Nafissa Ismail
Puberty is a critical period of development during which the brain undergoes reorganizing and remodeling. Exposure to stress during this period is thought to interfere with normal brain development and increase susceptibility to mental illnesses. In female mice, pubertal exposure to lipopolysaccharide (LPS), a bacterial endotoxin, has been shown to alter sexual, anxiety-like, and depression-like behaviors and cognition in an enduring manner. However, the mechanisms underlying these effects remain unknown. The present study examined age and sex difference in tyrosine hydroxylase (TH) expression and dopamine-dependent and Parkinson-like behaviors following LPS treatment...
December 24, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/27885433/discussing-sexuality-with-patients-with-parkinson-s-disease-a-survey-among-dutch-neurologists
#9
Petra J M van Hees, Anton A van der Plas, Gaby F van Ek, Hein Putter, Brenda L Den Oudsten, Marjolein E M den Ouden, Henk W Elzevier
Sexual functioning is often impaired in patients with Parkinson's disease (PD) and may affect quality of life of patients and their spouse. However, little is known about the practice patterns of neurologists with regard to discussing sexuality in this field. The aim of this cross-sectional study was to evaluate to what extent neurologists discuss sexuality with PD patients. A 22-item questionnaire was sent to 139 neurologists specializing in PD. The survey contained questions about their attitudes, knowledge, and practice patterns with respect to sexual dysfunction (SD) in patients with PD...
March 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27853927/the-impact-of-parkinson-disease-on-patients-sexuality-and-relationship
#10
C Buhmann, S Dogac, E Vettorazzi, U Hidding, C Gerloff, T P Jürgens
This study aimed at examining the impact of Parkinson disease (PD) on patients' sexuality and relationship and to evaluate gender-specific differences. Using a standardized questionnaire on sexual functioning in chronic diseases (SFCE), the impact of PD diagnosis on 38 domains of sexuality before and since PD diagnosis was evaluated retrospectively in 53 consecutive patients in a relationship. Changes in self-assessed ratings on a four-point Likert scale were determined for all patients. In addition, gender-specific differences and the influence of age, depression (BDI-II), medication, disease severity and disease duration on domains of the SFCE were calculated...
November 16, 2016: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27802244/sexual-preoccupation-behavior-in%C3%A2-parkinson-s-disease
#11
Gila Bronner, Sharon Hassin-Baer, Tanya Gurevich
People with Parkinson's disease (PD) present with problematic sexual behaviors that are often misunderstood or ignored. Sexual problems in PD are part of a non-motor syndrome, and they play a  prominent role in the life of affected individuals and their partners. Based on our considerable clinical experience, we describe four common types of sexual preoccupation behaviors in people with PD: (1) sexual behavior with underlying sexual dysfunction, (2) sexual desire discrepancy with partner after restored desire, (3) hypersexuality and compulsive sexual behavior, and (4) sexual behavior with underlying restless genital syndrome...
2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/27761118/sexual-well-being-in-patients-with-blepharospasm-spasmodic-torticollis-and-hemifacial-spasm-a-pilot-study
#12
Paola Perozzo, Adriana Salatino, Paolo Cerrato, Raffaella Ricci
Mood, anxiety, and other psychological symptoms are common in dystonic patients suffering from blepharospasm (BSP) and spasmodic torticollis (ST). Since sexual well-being is an important aspect of mental health, here, we investigated whether these patients may also experience a worsening of their sexual life. In particular, quality of sexual life was evaluated in patients suffering from BSP (N = 30), ST (N = 30), and in a control group of patient with Hemifacial spasm (HFS; N = 30), undergoing botulinum toxin type A therapy...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27721206/the-cortical-thickness-correlates-of-clinical-manifestations-in-the-mid-stage-sporadic-parkinson-s-disease
#13
Xia Deng, Chun-Yan Tang, Jie Zhang, Lei Zhu, Zun-Chun Xie, Hong-Han Gong, Xiang-Zuo Xiao, Ren-Shi Xu
The cortical thickness has gained an extensive attention as a pathological alteration of sporadic Parkinson's disease (sPD), the alteration of pathological cortical thickness may distinctly contribute to the consistent clinical manifestations. Therefore, we investigated the cortical thickness correlates of clinical manifestations in the mid-stage sPD from the Han population of Chinese mainland (HPCM). A sample of 67 mid-stage sPD patients and 35 matched controls from HPCM were performed a corticometry of magnetic resonance imaging (MRI) and the assessment of clinical manifestations including the demographic and disease-related characteristics, and underwent the final analysis of the cortical thickness correlates with the clinical manifestations...
October 28, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27664144/self-reported-symptoms-of-parkinson-s-disease-by-sex-and-disease-duration
#14
Ju Young Shin, Ryan T Pohlig, Barbara Habermann
Parkinson's disease (PD) is a neurodegenerative disease with a wide range of symptom presentations. The purpose of this research was to compare self-reported motor and non-motor symptoms of PD by sex and disease duration. This study was a cross-sectional descriptive survey in community-dwelling people with PD. A total of 141 participants (64.6% response rate; 59.6% men; Mage = 69.7 years) were included. Males reported more rigidity, speech problems, sexual dysfunction, memory problems, and socializing problems than females...
September 1, 2016: Western Journal of Nursing Research
https://www.readbyqxmd.com/read/27637804/chronic-mild-stress-accelerates-the-progression-of-parkinson-s-disease-in-a53t-%C3%AE-synuclein-transgenic-mice
#15
Qimei Wu, Xiaoyu Yang, Yu Zhang, Lei Zhang, Linyin Feng
Daily stress is associated with increased risk for various diseases, and numerous studies have provided evidence that environmental stress leads to deleterious effects on the central nervous system. However, it remains unclear whether chronic stress exacerbates the progression of Parkinson's disease (PD). To investigate this hypothesis, we determined the effect of chronic mild stress (CMS) on the pathogenesis of PD in a transgenic mice line that overexpresses the human A53T mutant α-synuclein (A53T Tg mice)...
November 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27590295/impulsive-compulsive-behaviors-in-parkin-associated-parkinson-disease
#16
Francesca Morgante, Alfonso Fasano, Monia Ginevrino, Simona Petrucci, Lucia Ricciardi, Francesco Bove, Chiara Criscuolo, Marcello Moccia, Anna De Rosa, Chiara Sorbera, Anna Rita Bentivoglio, Paolo Barone, Giuseppe De Michele, Maria Teresa Pellecchia, Enza Maria Valente
OBJECTIVE: The aim of this multicenter, case-control study was to investigate the prevalence and severity of impulsive-compulsive behaviors (ICBs) in a cohort of patients with parkin-associated Parkinson disease (PD) compared to a group of patients without the mutation. METHODS: We compared 22 patients with biallelic parkin mutations (parkin-PD) and 26 patients negative for parkin, PINK1, DJ-1, and GBA mutations (PD-NM), matched for age at onset, disease duration, levodopa, and dopamine agonist equivalent daily dose...
October 4, 2016: Neurology
https://www.readbyqxmd.com/read/27541930/modulation-of-dopaminergic-pathways-to-treat-erectile-dysfunction
#17
REVIEW
Ulf Simonsen, Simon Comerma-Steffensen, Karl-Erik Andersson
The currently recommended first-line treatments of erectile dysfunction (ED), phosphodiesterase type 5 inhibitors (PDE5i), for example sildenafil, are efficacious in many patients with ED of vascular origin, but this therapy is insufficient in approximately 30-40% of men with ED where there is also a neuronal affection. There is a demand of novel approaches to treat the condition. We review the possibility of modulating the dopaminergic pathways to improve erectile function. Dopamine D1 (D1 , D5 )- and D2 (D2 -D4 )-like receptors in the paraventricular area, the medial pre-optic area, the spinal cord, and in the erectile tissue are involved in erection, and several agonists developed for the treatment of Parkinson's disease are associated with increased libido...
October 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27501238/sexual-dysfunction-in-women-with-parkinson-s-disease
#18
Sara Varanda, Joana Ribeiro da Silva, Ana Sofia Costa, Cristiana Amorim de Carvalho, José Nuno Alves, Margarida Rodrigues, Gisela Carneiro
BACKGROUND: Sexual dysfunction in women with Parkinson's disease is poorly understood and research in this area is scarce. The objectives of this study were sexual function characterization in female Parkinson's disease patients, description of sexual dysfunctions, correlation with disease characteristics, and comparison with matched healthy controls. METHODS: Social and demographic data from consecutive female patients with Parkinson's disease and matched healthy controls were collected...
August 8, 2016: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/27453488/aldehyde-dehydrogenase-2-is-associated-with-cognitive-functions-in-patients-with-parkinson-s-disease
#19
Rwei-Ling Yu, Chun-Hsiang Tan, Ying-Che Lu, Ruey-Meei Wu
Neurotransmitter degradation has been proposed to cause the accumulation of neurotoxic metabolites. The metabolism of these metabolites involves aldehyde dehydrogenase 2 (ALDH2). The Asian-specific single nucleotide polymorphism rs671 causes reduced enzyme activity. This study aims to explore whether Parkinson's disease (PD) patients with reduced ALDH2 activity owing to the rs671 polymorphism are at risk for neuropsychological impairments. A total of 139 PD patients were recruited. Each participant was assessed for medical characteristics and their ALDH2 genotype...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27425586/impulse-control-disorder-related-behaviours-during-long-term-rotigotine-treatment-a-post-hoc-analysis
#20
A Antonini, K R Chaudhuri, B Boroojerdi, M Asgharnejad, L Bauer, F Grieger, D Weintraub
BACKGROUND AND PURPOSE: Dopamine agonists in Parkinson's disease (PD) are associated with impulse control disorders (ICDs) and other compulsive behaviours (together called ICD behaviours). The frequency of ICD behaviours reported as adverse events (AEs) in long-term studies of rotigotine transdermal patch in PD was evaluated. METHODS: This was a post hoc analysis of six open-label extension studies up to 6 years in duration. Analyses included patients treated with rotigotine for at least 6 months and administered the modified Minnesota Impulse Disorders Interview...
October 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
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