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1.
Leg Med (Tokyo) ; 70: 102469, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38870841

RESUMEN

Monoamine oxidase A (MAOA) catalyzes oxidative deamination of catecholamines. A functional variable number tandem repeat (VNTR) polymorphism in the promoter region of the MAOA gene has been previously reported. In the present study, we measured serum adrenaline (Adr), noradrenaline (Nad), and dopamine (DA) levels in 90 male and 34 female Japanese autopsy cases in which amphetamines or psychotropic drugs were not detected.We examined the frequencies of MAOA-uVNTR alleles in these cases and investigated the effects of the MAOA-uVNTR polymorphism on serum Adr, Nad, and DA levels. Evaluation indicated no significant association between MAOA-uVNTR polymorphism and serum Adr, Nad, or DA levels in males, although a significant association between MAOA-uVNTR polymorphism and serum Adr and DA levels were observed in females. Females with the 3/3 genotype had higher serum Adr and DA levels than those with a 4-repeat allele (3/4 and 4/4 genotypes) (p = 0.048 and 0.020, respectively). There was no significant association between MAOA-uVNTR polymorphism and serum Nad levels in females. The present study indicates that MAOA-uVNTR polymorphism influences serum Adr and DA levels only in females.


Asunto(s)
Repeticiones de Minisatélite , Monoaminooxidasa , Polimorfismo Genético , Regiones Promotoras Genéticas , Humanos , Monoaminooxidasa/genética , Monoaminooxidasa/sangre , Masculino , Femenino , Repeticiones de Minisatélite/genética , Regiones Promotoras Genéticas/genética , Adulto , Persona de Mediana Edad , Catecolaminas/sangre , Autopsia , Anciano , Genotipo , Adulto Joven , Dopamina/sangre , Anciano de 80 o más Años , Epinefrina/sangre
2.
eNeurologicalSci ; 35: 100503, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38779414

RESUMEN

Introduction: Constipation is one of the most common non-motor symptoms of Parkinson's disease (PD) and is associated with reduced quality of life in patients with PD. The aim of this study was to evaluate the effect of lactulose on defecation status in patients with PD. Methods: In this open-label, single-center, exploratory pilot study, twenty-nine patients with PD received lactulose for three weeks for the treatment of constipation. The primary endpoint was the number of spontaneous bowel movements (SBMs). The secondary endpoints were stool consistency (Bristol Stool Form Scale [BSFS]) and the number of rescue laxatives used. Results: Twenty-five patients with PD completed the study. The number of SBMs recorded during the lactulose intervention period was significantly increased compared with that recorded during the pre-intervention period. During the intervention period, the BSFS scores of the patients increased significantly, whereas the number of rescue laxatives they used decreased significantly. No serious adverse events were observed during the study period. Lactulose was well-tolerated. Conclusions: The results of this study suggest that lactulose may be effective in improving defecation status in patients with PD. Further randomized controlled trials are needed to confirm the effects of lactulose on constipation in patients with PD.

3.
J Forensic Leg Med ; 103: 102672, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38484485

RESUMEN

A male in his late 30s was found dead in his home. He was diagnosed with human immunodeficiency virus (HIV) about six years prior. The HIV infection was well controlled before his death. He was 166 cm in height and 75 kg in weight. Aside from discoloration of the skin on the right lower patellar, there were no obvious injuries. His brain weighed 1456 g. A cut surface of the brain revealed left thalamic hemorrhage. Histologically, infiltration of phagocytic cells was observed in the bleeding site. Thalamic hemorrhage was considered to be his cause of death in this case. Due to the effects of anti-HIV therapy, the mortality rate from HIV infection has decreased and the causes of death of HIV-infected persons have changed. HIV-infected persons have been suggested to be associated with cerebrovascular disease, especially juvenile ischemic stroke. Patients with acquired immunodeficiency syndrome (AIDS) have an increased risk of cerebrovascular disease. Possible mechanisms of cerebrovascular disease in HIV-infected individuals include coagulopathy, secondary effects of embolism and central nervous system infection, and direct vascular disease due to HIV. At the time of autopsy, his post-mortem interval was estimated to be approximately two weeks. Therefore, it was difficult to clarify histologically the cerebrovascular disorder that caused his cerebral hemorrhage. In recent years, anti-HIV therapy has reduced the number of AIDS-related deaths, but deaths in HIV-infected people from cardiovascular disease are increasing. This case is considered to be a valuable forensic autopsy case of an HIV-infected patient who actually died due to cerebral hemorrhage in Japan.


Asunto(s)
Hemorragia Cerebral , Infecciones por VIH , Humanos , Masculino , Infecciones por VIH/complicaciones , Hemorragia Cerebral/patología , Adulto , Patologia Forense , Tálamo/patología
4.
Leg Med (Tokyo) ; 66: 102370, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38142489

RESUMEN

BACKGROUND: We encountered a urine sample suspected of being mixed with tea, submitted by a suspect attempting to camouflage illegal drugs. Although urine should turn reddish-pink during a urea test with p-Dimethylaminocinnamaldehyde (DAC), this suspect's sample exhibited a blue coloration when tested with DAC. AIM: Our aim was to examine the influence and mechanism of green tea on various urine identification tests. RESULTS: Our examination revealed that DAC forms a compound with the urea in urine, resulting in a reddish pink coloration with a molecular weight of 217. However, it has been reported that DAC binds to polyphenols such as catechin. In the case of catechin, DAC binds to the C8 position, forming a compound that exhibits the highest absorption at 640 nm and appears blue. we investigated the effect of urine from volunteers who had consumed a large amount of catechin on the urea test with DAC. Additionally, we carried out quantitative analysis of catechin in urine by LC-MS/MS after enzymatic treatment with ß-glucuronidase. The concentration of urinary excreted catechin reached its peak approximately 3 to 4 h after ingestion. During the DAC test, urine samples collected 3 to 4 h after catechin ingestion displayed a bluish pink color, but not the blue color observed in the original suspect sample. CONCLUSION: This study investigated the impact of catechin on urine tests, revealing that a blue color in the DAC test indicates a high likelihood of camouflage by the suspect.


Asunto(s)
Catequina , Humanos , Catequina/metabolismo , Cromatografía Liquida , Cromatografía Líquida de Alta Presión/métodos , Espectrometría de Masas en Tándem , , Urea
5.
Leg Med (Tokyo) ; 64: 102274, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37267737

RESUMEN

Phenylacetylglutamine (PAG) is a metabolite that is excreted in human urine. Phenylalanine is metabolized to phenylacetic acid, which is then amide-bonded to glutamine to form PAG. We are currently studying PAG as a urinary biomarker in forensic autopsy cases. MATERIALS AND METHODS: Urine samples were collected from 188 forensic autopsy cases and the urinary PAG concentration was analyzed quantitatively using GC-MS. Urinary creatinine (Cr) concentration was also analyzed by GC-MS. For statistical analysis, the JMP Pro 15.0.0 software program was used. The relationship between urine PAG/Cr (the ratio of each concentration), sex, age, postmortem interval (PMI), survival duration, and cause of death was statistically analyzed. RESULTS AND DISCUSSION: The median (range) of PAG/Cr was 0.12 (0.002-3.26). The PAG/Cr ratio showed no significant relationship to sex or survival duration. Regarding the cause of death, traumatic brain injuries had a significantly higher ratio than intoxication (p=0.023). Cerebrovascular disease, such as cerebral hemorrhage and subarachnoid hemorrhage, did not differ significantly from any cause of death group. However, when traumatic brain injuries and cerebrovascular accidents are combined as one cause of death group, the PAG/Cr value of CNS damages was significantly higher than that of intoxication (p=0.062). CONCLUSION: Urinary PAG/Cr might be a biomarker not only for traumatic brain injuries but also for antemortem CNS damages.


Asunto(s)
Lesiones Traumáticas del Encéfalo , Glutamina , Humanos , Autopsia , Glutamina/orina , Biomarcadores
6.
Proc Natl Acad Sci U S A ; 120(23): e2214652120, 2023 06 06.
Artículo en Inglés | MEDLINE | ID: mdl-37252975

RESUMEN

α-Synuclein accumulates in Lewy bodies, and this accumulation is a pathological hallmark of Parkinson's disease (PD). Previous studies have indicated a causal role of α-synuclein in the pathogenesis of PD. However, the molecular and cellular mechanisms of α-synuclein toxicity remain elusive. Here, we describe a novel phosphorylation site of α-synuclein at T64 and the detailed characteristics of this post-translational modification. T64 phosphorylation was enhanced in both PD models and human PD brains. T64D phosphomimetic mutation led to distinct oligomer formation, and the structure of the oligomer was similar to that of α-synuclein oligomer with A53T mutation. Such phosphomimetic mutation induced mitochondrial dysfunction, lysosomal disorder, and cell death in cells and neurodegeneration in vivo, indicating a pathogenic role of α-synuclein phosphorylation at T64 in PD.


Asunto(s)
Enfermedad de Parkinson , Humanos , Enfermedad de Parkinson/metabolismo , alfa-Sinucleína/genética , alfa-Sinucleína/metabolismo , Fosforilación , Cuerpos de Lewy/metabolismo , Encéfalo/metabolismo
7.
Leg Med (Tokyo) ; 59: 102144, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36088752

RESUMEN

A male in his late 50s had been complaining of headaches and dizziness for 25 years. He also had episodes of losing consciousness, but had not sought treatment because of financial hardship. He was found in the ocean. Autopsy revealed foamy liquid leaking from his nose and mouth, and pleural effusions. The trachea and bronchi contained the same foamy liquid. The lungs were swollen and edematous, and leaked a large amount of foamy liquid. His cause of death was diagnosed as drowning. In the brain, the veins on the frontal lobe and the temporal pole, each on the right cerebral hemisphere, were dilated. A vascular lesion measuring 5 × 5 × 8 cm was found on the bottom of the right frontal lobe, and was located between the right middle cerebral artery and those veins. This vascular lesion extended to the brain parenchyma, and the basal ganglia of the right cerebrum was displaced outward and upward. The vascular lesions in the brain showed blood vessels of various sizes and shapes, and some of the vessel walls were thickened. The vascular lesion on the right frontal lobe was diagnosed as an arteriovenous malformation (AVM). According to the police investigation, the harbor where his body was found was a place he often came for fishing and walking. The possibility of suicide cannot be ruled out. Moreover, it was considered that his AVM might have rendered him unconscious, causing him to fall into the ocean.


Asunto(s)
Cerebro , Ahogamiento , Malformaciones Arteriovenosas Intracraneales , Humanos , Masculino , Malformaciones Arteriovenosas Intracraneales/complicaciones , Malformaciones Arteriovenosas Intracraneales/patología , Malformaciones Arteriovenosas Intracraneales/terapia , Convulsiones , Cerebro/patología , Lóbulo Frontal
8.
Leg Med (Tokyo) ; 59: 102142, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36063610

RESUMEN

Incidents and accidents often involve the drinking of alcoholic beverages. We investigated compounds that indicate the consumption of alcoholic beverages even after ethanol (EtOH) becomes undetectable in blood and urine. Ethyl glucoside (EG) has been isolated as a possible drinking marker, and a GC-MS/MS method for EG isomers has been developed. EG isomers in several alcoholic beverages were analyzed. In sake, only αEG was observed in high concentrations. In wine and beer, both α and ßEG were detected. Whisky, however, did not contain EG. EtOH and EG concentrations were analyzed in urine up to 48 h after ingestion. Maximum EtOH concentrations were reached in 1-2 h and was mostly eliminated in 6 h. Maximum EG concentrations were reached in 3-6 h, gradually decreased, and remained low after 24 h. After drinking sake, the αEG concentrations were much higher than that of other alcoholic beverages. After drinking wine or beer, ßEG was detected, but lower than αEG. Also, αEG was detected in urine after drinking whisky that contained no EG. This suggested that αEG may be synthesized in vivo. Disaccharide-degrading enzymes such as α-glucosidase are present in the human small intestine. It was considered that αEG was synthesized when alcohol was consumed with certain foods, such as carbohydrates. In actual forensic autopsy cases, EtOH and EG isomer analysis provided useful information regarding drinking history. In conclusion, it is considered that urinary EG isomers can be used as drinking markers that complement EtOH analysis.


Asunto(s)
Espectrometría de Masas en Tándem , alfa-Glucosidasas , Humanos , alfa-Glucosidasas/análisis , Bebidas Alcohólicas/análisis , Etanol/análisis , Glucósidos/análisis , Disacáridos/análisis
9.
Rev Sci Instrum ; 93(5): 053501, 2022 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-35649816

RESUMEN

A collective Thomson scattering (CTS) diagnostic with a ±3 GHz band around a 77 GHz gyrotron probe beam was developed to measure the velocity distribution of bulk and fast ions in high-temperature plasmas. We propose a new in situ calibration method for a CTS diagnostic system combined with a raytracing code. The method is applied in two situations for electron cyclotron emission in plasmas and in a CTS diagnostic with a modulated probe beam. Experimental results highlight the importance of refraction correction in probe and receive beams. The CTS spectrum is measured with the in situ calibrated CTS receiver and responds to fast ions originating from a tangential neutral beam with an energy of 170 keV and from a perpendicular beam with an energy of 60 keV, both in the large helical device. From a velocity space analysis model, the results elucidate the measured anisotropic CTS spectrum caused by fast ions. The calibration methods and analyses demonstrated here are essential for CTS, millimeter-wave diagnostics, and electron cyclotron heating required under fusion reactor conditions.

10.
Rev Sci Instrum ; 93(4): 043507, 2022 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-35489915

RESUMEN

In this paper, we report the development of off-axis spiral phase mirrors that can be used to generate optical vortices from a range of millimeter waves. An obliquely incident Gaussian beam is reflected from a spiral phase mirror and is converted into an optical vortex beam with a desired topological charge. The mirrors were fabricated by mechanical machining. The designed vortex properties of reflected waves were investigated experimentally by using a low-power test, where the designed topological charge was verified based on the interference pattern between a vortex beam and a Gaussian-like beam. The designed topological charge was also estimated by using a phase retrieval method specialized for a vortex beam. These off-axis spiral phase mirrors can be used for propagation experiments of radio frequency waves with helical wavefronts in magnetized plasma.

11.
Rinsho Shinkeigaku ; 62(1): 8-14, 2022 Jan 28.
Artículo en Japonés | MEDLINE | ID: mdl-34924470

RESUMEN

We conducted the multicenter questionnaire survey targeting patients with Parkinson's disease (PD) in order to investigate the impacts on their daily lives and their requests to hospitals in the pandemic of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Mainly using open-ended questionnaire, we asked their anxiety, troubles they are facing, and requests toward hospitals in the pandemic of SARS-CoV-2. Two hundred fifth-eight PD patients answered the questionnaire. There were various opinions about anxiety such as "PD patients are susceptible and vulnerable to SARS-CoV-2" (36.8%). Concerning the troubles in the pandemic, the most frequent answer was that they couldn't participate in the rehabilitation and elderly day care (38.4%). Relatively many PD patients requested telemedicine (29.5%), whereas some people hoped face-to-face medical care (8.1%). There were demands about the delivery of medications (50.0%), the establishment of telephone consultations (43.8%), resources for rehabilitation at home (43.8%). The medical care adapted to the anxiety, trouble and requests of PD patients will be required in the era when we have to live with SARS-CoV-2.


Asunto(s)
COVID-19 , Encuestas de Atención de la Salud , Encuestas Epidemiológicas , Pandemias , Enfermedad de Parkinson/psicología , Enfermedad de Parkinson/terapia , Pacientes/psicología , Anciano , Ansiedad , COVID-19/epidemiología , Humanos , Enfermedad de Parkinson/rehabilitación , Telemedicina
12.
Artículo en Inglés | MEDLINE | ID: mdl-34875494

RESUMEN

Ethyl glucoside (EG) is present in Japanese sake in high concentrations, and can be found in other alcoholic beverages like beer and wine in varying amounts. EG exists as alpha (α) and beta (ß) isomers, and the concentrations and ratios of these isomers differ depending on the alcoholic beverage. Herein, we report a validated analysis method for the separation of EG isomers in human whole blood and urine, by GC-MS/MS. Whole blood and urine samples were deproteinized and interferences removed by weak cation exchange cartridges. The target analytes were acetylated using acetic anhydride and pyridine by microwave-accelerated derivatization. Separation was performed using tandem columns, with detection in the multiple reaction monitoring (MRM) mode. The MRM transitions for all compounds were m/z 157.0 > 115.1 for the quantifying transition, and m/z 157.0 > 73.1 and m/z 141.0 > 81.0 for the qualifying transitions. Assay validation included linearity, LOD and LLOQ, bias, within-run and between-run precision, stability, and dilution integrity. Baseline separation of the 2 isomers was achieved with linear calibration (r2 > 0.99) across the calibration range 0.625 to 50 µg/mL for both α- and ß-EG in both whole blood and urine. The validated method was then applied to actual human whole blood and urine samples collected at autopsy, as well as relevant alcoholic beverage samples. The quantitation of EG isomers could benefit the forensic toxicology community by acting as markers for recent alcoholic beverage consumption.


Asunto(s)
Cromatografía de Gases y Espectrometría de Masas/métodos , Glucósidos/sangre , Glucósidos/orina , Espectrometría de Masas en Tándem/métodos , Consumo de Bebidas Alcohólicas , Biomarcadores/sangre , Biomarcadores/orina , Glucósidos/química , Glucósidos/aislamiento & purificación , Humanos , Límite de Detección , Modelos Lineales , Reproducibilidad de los Resultados
13.
BMC Neurol ; 21(1): 480, 2021 Dec 10.
Artículo en Inglés | MEDLINE | ID: mdl-34893033

RESUMEN

BACKGROUND: Late-stage Parkinson's disease (PD) often presents with neuropsychiatric symptoms such as dementia, psychosis, excessive daytime sleepiness, apathy, depression, and anxiety. However, neuropsychiatric symptoms are the cardinal features of Creutzfeldt-Jakob disease (CJD), raising the possibility that CJD may be an overlooked condition when it accompanies late-stage PD. CASE PRESENTATION: We describe a female autopsy case of PD with a typical clinical course of 17 years, in which CJD overlapped with PD during the final year of the patient's life. The patient died aged 85 years. Neuropathological features included widespread Lewy body-related α-synucleinopathy predominantly in the brainstem and limbic system, as well as the typical pathology of methionine/methionine type 1 CJD in the brain. CONCLUSIONS: Our case demonstrates the clinicopathological co-occurrence of PD and CJD in a sporadic patient. The possibility of mixed pathology, including prion pathology, should be taken into account when neuropsychiatric symptoms are noted during the disease course of PD.


Asunto(s)
Síndrome de Creutzfeldt-Jakob , Enfermedad de Parkinson , Priones , Autopsia , Encéfalo/diagnóstico por imagen , Encéfalo/metabolismo , Síndrome de Creutzfeldt-Jakob/complicaciones , Femenino , Humanos , Enfermedad de Parkinson/complicaciones , Priones/metabolismo
14.
Sci Rep ; 11(1): 21528, 2021 11 02.
Artículo en Inglés | MEDLINE | ID: mdl-34728742

RESUMEN

Japan is surrounded by the sea and is also a mountainous country with many rivers. Japan has the second- highest rate of deaths caused by drowning in the world. Pleural effusion (PE) is one of the major findings at autopsy. It is found in approximately 80% of drowning mortalities and is observable for a relatively long postmortem interval (PMI). We focused on the amount of pleural fluid in drowning cases, discussed the relationship of PE with the drowning environment, water temperature, and postmortem interval, and established more simple and practical criteria for the diagnosis of drowning. We measured the weight of the lungs, PE, and their sum as the intrathoracic (IT) weight (total weight of lungs + pleural effusion), and calculated the PE ratio [(PE weight/IT weight) × 100]. A total of 130 drowning deaths diagnosed through forensic autopsies were investigated in this study. The cases were classified by drowning environment (freshwater, brackish water, and seawater), water temperature (under 20 °C, more than 20 °C), and postmortem interval (less than 1 day, 1-3 days, more than 3 days). The present study demonstrated that the PE ratio may be more effective for the diagnosis of drowning. Moreover, the accumulation of PE is affected by drowning environment, water temperature, and PMI. Collectively, it is important to assess the PE ratio and consider these factors in autopsy cases of victims found in water.


Asunto(s)
Ahogamiento/patología , Patologia Forense/métodos , Agua Dulce/análisis , Derrame Pleural/diagnóstico , Aguas Salinas/análisis , Agua de Mar/análisis , Temperatura , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Autopsia , Exudados y Transudados/química , Femenino , Estudios de Seguimiento , Humanos , Japón/epidemiología , Masculino , Persona de Mediana Edad , Derrame Pleural/epidemiología , Pronóstico , Adulto Joven
15.
Neuropathology ; 40(5): 496-500, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32666658

RESUMEN

Interhemispheric cysts are congenital, and usually present symptoms during childhood. However, they are occasionally detected in adults. These cystic lesions are sometimes associated with defects of the corpus callosum. Although defects of the corpus callosum by themselves do not present clinical symptoms, they are often accompanied by other brain malformations. A man in his late 60s was found dead at the scene of a fire. At autopsy, his brain weighed 1223 g and had a large interhemispheric cyst, measuring 5.5 × 4.5 × 4.0 cm in size. The cyst contained clear fluid but was not connected to the ventricular system. On slices of the cerebrum, the corpus callosum did not connect the right and left cerebral hemispheres, and the right lateral ventricle was dilated. By the existence of the cyst, compressed by the cyst, the hemispheres were displaced on either side. Histologically, the cerebral parenchyma around the cyst was slightly edematous but structurally normal. Immunohistochemically, both glial fibrillary acidic protein and podoplanin were expressed in the cystic components. Thus, the cystic lesion was diagnosed as a glioependymal cyst. In this case, because the cyst was located at the interhemispheric space between the right and left frontal lobes, the individual experienced no obvious symptoms, despite its large size. The individual's brain malformations included the partial defect of the corpus callosum and the cyst. The dilation of the right lateral ventricle was considered to result from the location of the cyst. Under the influence of the cyst, the third ventricle was displaced downward, and one or both of the interventricular foramen were obstructed. The decedent had burns over his whole body. Burns to the epiglottis and soot in the airway were also observed. Volatile hydrocarbons, such as benzene and styrene, were detected in the blood. The percentage of carboxyhemoglobin levels in a total of hemoglobin levels were 19-25%. Therefore, the individual's cause of death was established as death by fire.


Asunto(s)
Agenesia del Cuerpo Calloso/patología , Encéfalo/patología , Quistes/patología , Agenesia del Cuerpo Calloso/complicaciones , Quistes/complicaciones , Humanos , Masculino , Persona de Mediana Edad
16.
Clin Park Relat Disord ; 3: 100071, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-34316650

RESUMEN

Motor fluctuations can be seen even during treatment with continuous levodopa-carbidopa intestinal gel infusion (LCIG). We report on a middle-aged man with advanced Parkinson's disease (PD) on LCIG in which motor fluctuations have been improved with an anticholinergic. To the best of our knowledge, there have been no previous LCIG cases reported with motor fluctuations responding to non-dopaminergic agent, which might reveal some clues to its pathophysiology. Long-term oral levodopa treatment is associated with development of potentially disabling motor complications including motor fluctuations and dyskinesias in the majority of patients with PD. It has been suggested that motor complications are related to the nonphysiological restoration of brain dopamine with intermittent administration of standard oral levodopa. LCIG significantly reduces "off" time and increases "on" time without dyskinesia in comparison to standard oral levodopa through consistent plasma concentration of levodopa to restore brain dopamine in a more physiological manner. However, it has been reported that PD patients on LCIG often worsen during the afternoon hours, even with stable plasma concentration of levodopa. This raises the possibility that additional factors to dopamine deficiency could play a role in occurrence of motor fluctuations. Here we offer a hypothesis that altered cholinergic signaling could also be involved in the pathophysiology of motor fluctuations, based on our clinical evidence that anticholinergic drug has eliminated motor fluctuations during LCIG in a patient with PD. Further studies for non-dopaminergic along with dopaminergic signaling may be needed to better understand the pathophysiological basis of motor complications in PD.

17.
Proc Natl Acad Sci U S A ; 116(41): 20689-20699, 2019 10 08.
Artículo en Inglés | MEDLINE | ID: mdl-31548400

RESUMEN

Mutations in the iPLA2-VIA/PLA2G6 gene are responsible for PARK14-linked Parkinson's disease (PD) with α-synucleinopathy. However, it is unclear how iPLA2-VIA mutations lead to α-synuclein (α-Syn) aggregation and dopaminergic (DA) neurodegeneration. Here, we report that iPLA2-VIA-deficient Drosophila exhibits defects in neurotransmission during early developmental stages and progressive cell loss throughout the brain, including degeneration of the DA neurons. Lipid analysis of brain tissues reveals that the acyl-chain length of phospholipids is shortened by iPLA2-VIA loss, which causes endoplasmic reticulum (ER) stress through membrane lipid disequilibrium. The introduction of wild-type human iPLA2-VIA or the mitochondria-ER contact site-resident protein C19orf12 in iPLA2-VIA-deficient flies rescues the phenotypes associated with altered lipid composition, ER stress, and DA neurodegeneration, whereas the introduction of a disease-associated missense mutant, iPLA2-VIA A80T, fails to suppress these phenotypes. The acceleration of α-Syn aggregation by iPLA2-VIA loss is suppressed by the administration of linoleic acid, correcting the brain lipid composition. Our findings suggest that membrane remodeling by iPLA2-VIA is required for the survival of DA neurons and α-Syn stability.


Asunto(s)
Encéfalo/patología , Membrana Celular/patología , Neuronas Dopaminérgicas/patología , Proteínas de Drosophila/metabolismo , Fosfolipasas A2 Grupo X/metabolismo , Degeneración Nerviosa/patología , Enfermedad de Parkinson/patología , alfa-Sinucleína/química , Animales , Animales Modificados Genéticamente , Encéfalo/metabolismo , Membrana Celular/metabolismo , Neuronas Dopaminérgicas/metabolismo , Proteínas de Drosophila/genética , Drosophila melanogaster , Estrés del Retículo Endoplásmico , Femenino , Fosfolipasas A2 Grupo VI/genética , Fosfolipasas A2 Grupo VI/metabolismo , Fosfolipasas A2 Grupo X/genética , Humanos , Masculino , Mitocondrias/metabolismo , Mitocondrias/patología , Proteínas Mitocondriales/genética , Proteínas Mitocondriales/metabolismo , Degeneración Nerviosa/metabolismo , Enfermedad de Parkinson/metabolismo , Fosfolípidos/metabolismo , Transmisión Sináptica , alfa-Sinucleína/genética , alfa-Sinucleína/metabolismo
18.
Brain ; 142(9): 2845-2859, 2019 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-31312839

RESUMEN

Mutations in lysosomal genes increase the risk of neurodegenerative diseases, as is the case for Parkinson's disease. Here, we found that pathogenic and protective mutations in arylsulfatase A (ARSA), a gene responsible for metachromatic leukodystrophy, a lysosomal storage disorder, are linked to Parkinson's disease. Plasma ARSA protein levels were changed in Parkinson's disease patients. ARSA deficiency caused increases in α-synuclein aggregation and secretion, and increases in α-synuclein propagation in cells and nematodes. Despite being a lysosomal protein, ARSA directly interacts with α-synuclein in the cytosol. The interaction was more extensive with protective ARSA variant and less with pathogenic ARSA variant than wild-type. ARSA inhibited the in vitro fibrillation of α-synuclein in a dose-dependent manner. Ectopic expression of ARSA reversed the α-synuclein phenotypes in both cell and fly models of synucleinopathy, the effects correlating with the extent of the physical interaction between these molecules. Collectively, these results suggest that ARSA is a genetic modifier of Parkinson's disease pathogenesis, acting as a molecular chaperone for α-synuclein.


Asunto(s)
Cerebrósido Sulfatasa/fisiología , Chaperonas Moleculares/metabolismo , Mutación Missense , Enfermedad de Parkinson/metabolismo , Mutación Puntual , alfa-Sinucleína/metabolismo , Adulto , Anciano , Animales , Animales Modificados Genéticamente , Encéfalo/enzimología , Caenorhabditis elegans/genética , Caenorhabditis elegans/metabolismo , Proteínas de Caenorhabditis elegans/genética , Proteínas de Caenorhabditis elegans/metabolismo , Células Cultivadas , Cerebrósido Sulfatasa/sangre , Cerebrósido Sulfatasa/genética , Demencia/sangre , Demencia/etiología , Proteínas de Drosophila/deficiencia , Proteínas de Drosophila/genética , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/genética , Drosophila melanogaster/metabolismo , Femenino , Técnicas de Inactivación de Genes , Genes Dominantes , Humanos , Masculino , Persona de Mediana Edad , Enfermedad de Parkinson/genética , Enfermedad de Parkinson/psicología , Linaje , Agregación Patológica de Proteínas/genética , Mapeo de Interacción de Proteínas , Proteínas Recombinantes/metabolismo
19.
J Med Invest ; 66(1.2): 81-85, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31064961

RESUMEN

BACKGROUND: p-Cresol concentrations are high in the blood of hemodialysis (HD) patients. However, its organ distribution has not yet been investigated in detail. We herein report the distribution of p-cresolin HD patients from forensic autopsy cases. METHODS: p-Cresol was measured in the blood, urine, lungs, liver, and kidneys from 4 HD and 4 non-HD cases. Samples were extracted with p-cresol-d8 (internal standard), derivatized,and injected on the GC-MS. RESULTS AND DISCUSSION: The total urinary p-cresol/Cr was 79.73 ng/ml in HD cases,which was 16-fold higher than that in non-HD cases. p-Cresol in the blood and kidneys were 30-fold higher or more at 11.92 and 13.08 µg/mL(g), respectively. p-Cresol in the liver and lungs were approximately 20-fold higher at 4.82 and 9.99 µg/g, respectively. p-Cresol was markedly increased in not only the blood, but also the urine and organs of HD cases. The distribution of p-cresol in the blood, urine, and organs differed between HD and non-HD cases. In HD cases, the percentages of conjugated (C) and protein-bound conjugated (PC) urinary p-cresol were 57 and 41%, respectively. C and PC p-cresol was 66% and 25% in the kidneys, respectively, and similar results were obtained in the lungs. J. Med. Invest. 66 : 81-85, February, 2019.


Asunto(s)
Cresoles/farmacocinética , Diálisis Renal , Adulto , Anciano , Anciano de 80 o más Años , Creatinina/orina , Femenino , Humanos , Masculino , Persona de Mediana Edad , Distribución Tisular
20.
Neurosci Lett ; 701: 71-76, 2019 05 14.
Artículo en Inglés | MEDLINE | ID: mdl-30794821

RESUMEN

Monoamine oxidase A (MAOA) plays important roles in the metabolism of catecholamines and modulates adrenergic, noradrenergic, and dopaminergic signaling. A polymorphic promoter variable number tandem repeat (VNTR) locus (MAOA-uVNTR) is located approximately 1.2 kb upstream from MAOA exon 1. Functional studies revealed that MAOA-uVNTR affects gene expression. In the present study, we examined the frequencies of MAOA-uVNTR alleles in Japanese autopsy cases, in which amphetamines or psychotropic drugs were not detected. In total, 87 males and 35 females were evaluated and investigated for the possible effect of MAOA-uVNTR polymorphisms on cerebrospinal fluid (CSF) catecholamine concentrations. In males, there was no significant association between MAOA-uVNTR polymorphisms and CSF adrenaline (Adr), noradrenaline (Nad), or dopamine (DA) levels. In contrast, females who were homozygous for the 3-repeat allele (i.e., 3/3 genotype carriers) had higher CSF levels of Adr (p = 0.024) and DA (p = 0.035) than individuals who were heterozygous or homozygous for the 4-repeat allele (3/4 and 4/4, respectively). We found no significant association between MAOA-uVNTR polymorphisms and CSF Nad levels in females. Thus, the results of the present study indicated that MAOA-uVNTR polymorphism influences CSF Adr and DA levels in females.


Asunto(s)
Catecolaminas/líquido cefalorraquídeo , Repeticiones de Minisatélite , Monoaminooxidasa/genética , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Alelos , Autopsia , Niño , Femenino , Ciencias Forenses , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Polimorfismo Genético , Regiones Promotoras Genéticas , Adulto Joven
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