Mohan Dai, Binpeng Xu, Qing Guo, Junfen Wan, Xuejun Cao
Ursodeoxycholic acid (UDCA) is not only safer than chenodeoxycholic acid in the treatment of hepatobiliary diseases, but also has a wide range of applications in Acute Kidney Injury and Parkinson's Disease. The purpose of this experiment is to improve the conversion rate of 7-ketocholic acid (7K-LCA) and the yield of ursodeoxycholic acid in aprotic solvents during electrochemical reduction process. Three aprotic solvents were investigated as electrolytes. 1,3-Dimethyl-2-imidazolidinone (DMI) has a stable five-membered ring structure, and 7K-LCA has undergone two nucleophilic reactions and "Walden" inversion, the 7K-LCK was stereoselectively reduced to UDCA...
August 7, 2023: Bioresources and Bioprocessing
Hossein Mousavi, Mehdi Rimaz, Behzad Zeynizadeh
Neurodegenerative diseases (NDs) are one of the prominent health challenges facing contemporary society, and many efforts have been made to overcome and (or) control it. In this research paper, we described a practical one-pot two-step three-component reaction between 3,4-dihydronaphthalen-1(2 H )-one ( 1 ), aryl(or heteroaryl)glyoxal monohydrates ( 2a - h ), and hydrazine monohydrate (NH2 NH2 •H2 O) for the regioselective preparation of some 3-aryl(or heteroaryl)-5,6-dihydrobenzo[ h ]cinnoline derivatives ( 3a - h )...
April 22, 2024: ACS Chemical Neuroscience
Miguel Pinto, Cláudia Sofia Machado, Sandra Barreiro, Francisco J Otero-Espinar, Fernando Remião, Fernanda Borges, Carlos Fernandes
Tolcapone is an orally active catechol-O-methyltransferase (COMT) inhibitor used as adjuvant therapy in Parkinson's disease. However, it has a highly hepatotoxic profile, as recognized by the U.S. Food and Drug Administration. As a possible solution, nanoscience brought us several tools in the development of new functional nanomaterials with tunable physicochemical properties, which can be part of a solution to solve several drawbacks, including drug's short half-life and toxicity. This work aims to use PEGylated poly(lactic- co -glycolic acid) (PLGA) nanoparticles as a stable carrier with lower hydrodynamic size and polydispersity to encapsulate tolcapone in order to overcome its therapeutic drawbacks...
April 22, 2024: ACS Applied Materials & Interfaces
Praveen Kumar Pasala, Mithun Rudrapal, Ranadheer Reddy Challa, Sheikh F Ahmad, Bhaskar Vallamkonda, Ram Babu R
Parkinson's disease (PD) is characterised by the gradual demise of dopaminergic neurons. In recent years, there has been significant interest in herbal treatments. In this study, hesperetin nanoparticles (HTN) were developed and compared their anti-PD potential with hesperetin (HT) on rotenone induced PD rats. Molecular docking was also performed to evaluate the binding affinity of hesperetin on pathological protein, i.e. D2 dopamine receptors (DR2), using Auto Dock Vina tools. The results showed a higher binding relationship of HTN on dopamine receptors (-7...
April 22, 2024: Natural Product Research
Ketan Maru, Amarendra Singh, Ritambhara Jangir, Komal Kumar Jangir
Neurodegenerative diseases (amyloid diseases such as Alzheimer's and Parkinson's), stemming from protein misfolding and aggregation, encompass a spectrum of disorders with severe systemic implications. Timely detection is pivotal in managing these diseases owing to their significant impact on organ function and high mortality rates. The diverse array of amyloid disorders, spanning localized and systemic manifestations, underscores the complexity of these conditions and highlights the need for advanced detection methods...
April 22, 2024: Journal of Materials Chemistry. B, Materials for Biology and Medicine
Valentina Duga, Riccardo Giossi, Luigi Michele Romito, Mario Stanziano, Vincenzo Levi, Celeste Panteghini, Giovanna Zorzi, Nardo Nardocci
BACKGROUND: The evidence in the effectiveness of deep brain stimulation in children with medication-refractory non-degenerative monogenic dystonia is heterogeneous and long-term results are sparse. OBJECTIVES: The objective is to describe long-term outcomes in a single-center cohort and compare our results with a meta-analysis cohort form literature. METHODS: We performed a retrospective single-center cohort study including consecutive pediatric patients with non-degenerative genetic or idiopathic dystonia treated with globus pallidus internus deep brain stimulation at our center and a systematic review and individual-patient data meta-analysis with the same inclusion criteria...
April 22, 2024: Movement Disorders: Official Journal of the Movement Disorder Society
Josefa Domingos, John Dean, Júlio Belo Fernandes, Carlos Família, Sónia Fernandes, Catarina Godinho
INTRODUCTION: There is growing evidence suggesting that dual-task training benefits people with Parkinson's disease (PD) on both physical and cognitive outcomes. However, there is no known data regarding professionals' educational needs and barriers to its implementation. This study aimed to explore the barriers and educational needs of healthcare and exercise professionals to integrate dual-task training into their practice with people with PD. METHODS: We conducted a study based on a web survey...
2024: Frontiers in Medicine
Andrew Willett, Scott A Wylie, Jessica L Bowersock, Benoit M Dawant, William Rodriguez, Beatrice Ugiliweneza, Joseph S Neimat, Nelleke C van Wouwe
Deep brain stimulation of the subthalamic nucleus is an effective treatment for the clinical motor symptoms of Parkinson's disease, but may alter the ability to learn contingencies between stimuli, actions and outcomes. We investigated how stimulation of the functional subregions in the subthalamic nucleus (motor and cognitive regions) modulates stimulus-action-outcome learning in Parkinson's disease patients. Twelve Parkinson's disease patients with deep brain stimulation of the subthalamic nucleus completed a probabilistic stimulus-action-outcome task while undergoing ventral and dorsal subthalamic nucleus stimulation (within subjects, order counterbalanced)...
2024: Brain communications
Ankur Singla, Archana Gautam, Amandeep Goyal, Tarun Dalia
UNLABELLED: Ebstein's anomaly (EA), a congenital cardiac anomaly, is characterized by apical displacement of the tricuspid valve leaflet(s) into the right ventricle. We present the case of a 61-year-old female with a history of EA, Wolff-Parkinson-White syndrome, and patent foramen ovale (PFO), who presented with worsening hypoxia and confusion, in the setting of left lower extremity cellulitis and abscess. The computed tomography (CT) scan of the head showed a cerebellar infarct with hemorrhagic conversion...
April 2024: Journal of Cardiology Cases
Onanong Phokaewvarangkul, Nithinan Kantachadvanich, Vijittra Buranasrikul, Kanyawat Sanyawut, Saisamorn Phumphid, Chanawat Anan, Roongroj Bhidayasiri
INTRODUCTION: Apomorphine, a potent dopamine agonist, is a therapeutic option for patients with Parkinson's disease and motor fluctuations. However, the adoption of and adherence to this therapy have been limited by the need for complex delivery devices and specialized care as well as resource consumption, posing challenges for new physicians. Thailand is a unique example of a developing nation that has successfully implemented and continued the use of this therapy by employing cooperative technology that has dramatically enhanced apomorphine delivery services...
2024: Frontiers in Neurology
Kyuheon Lee, Tae Young Park, Wonhye Lee, Hyungmin Kim
Transcranial ultrasonic neuromodulation is a rapidly burgeoning field where low-intensity transcranial focused ultrasound (tFUS), with exquisite spatial resolution and deep tissue penetration, is used to non-invasively activate or suppress neural activity in specific brain regions. Over the past decade, there has been a rapid increase of tFUS neuromodulation studies in healthy humans and subjects with central nervous system (CNS) disease conditions, including a recent surge of clinical investigations in patients...
May 2024: Biomedical Engineering Letters
Tugay Çamoğlu, Zuhal Yurttaş, Ümit Yaşar Kına, Pınar Akkuş Süt, Fikrettin Sahin, Erdinç Dursun, Duygu Gezen-Ak
Parkinson's disease (PD) is the second most prevalent neurodegenerative disorder worldwide. According to the Braak hypothesis, the disease spreads along specific neuroanatomical pathways. Studies indicate that fibrillar alpha-synuclein (F-αSyn) can propagate from cell-to-cell by following intercellular connections, leading to the selective death of certain cell groups like substantia nigra dopaminergic neurons and advancing the pathology. Internalized F-αSyn can be eliminated by lysosomes, proteasomes, or chaperones before it replicates inside the cell...
April 16, 2024: ACS Omega
Julia Greenberg, Kelly Astudillo, Steven J Frucht, Adeen Flinker, Giulietta M Riboldi
INTRODUCTION: Given the unique natural history of GBA -related Parkinson's disease ( GBA -PD) and the potential for novel treatments in this population, genetic testing prioritization for the identification of GBA -PD patients is crucial for prognostication, individualizing treatment, and stratification for clinical trials. Assessing the predictive value of certain clinical traits for the GBA -variant carrier status will help target genetic testing in clinical settings where cost and access limit its availability...
2024: Clinical parkinsonism & related disorders
Ryuji Neshige, Shuichiro Neshige
This retrospective review on patients with Parkinson's disease, focusing on using mucuna beans (MB), its dosing, and administration methods. Two hundred patients taking 1-3 g of MP dissolved in hot water daily orally. Besides, MB administration via enema may be viable, especially when oral L-dopa efficacy is insufficient.
2024: Clinical parkinsonism & related disorders
Owen Dando, Robert McGeachan, Jamie McQueen, Paul Baxter, Nathan Rockley, Hannah McAlister, Adharsh Prasad, Xin He, Declan King, Jamie Rose, Phillip B Jones, Jane Tulloch, Siddharthan Chandran, Colin Smith, Giles Hardingham, Tara L Spires-Jones
Mutations in the MAPT gene encoding tau protein can cause autosomal dominant neurodegenerative tauopathies including frontotemporal dementia (often with Parkinsonism). In Alzheimer's disease, the most common tauopathy, synapse loss is the strongest pathological correlate of cognitive decline. Recently, PET imaging with synaptic tracers revealed clinically relevant loss of synapses in primary tauopathies; however, the molecular mechanisms leading to synapse degeneration in primary tauopathies remain largely unknown...
April 12, 2024: medRxiv
S G Choi, T Tittle, D Garcia-Prada, J H Kordower, R Melki, B A Killinger
UNLABELLED: Alpha-synuclein (αsyn) is an intrinsically disordered protein that aggregates in the brain in several neurodegenerative diseases collectively called synucleinopathies. Phosphorylation of αsyn at serine 129 (PSER129) was considered rare in the healthy human brain but is enriched in pathological αsyn aggregates and is used as a specific marker for disease inclusions. However, recent observations challenge this assumption by demonstrating that PSER129 results from neuronal activity and can be readily detected in the non-diseased mammalian brain...
April 9, 2024: bioRxiv
Katerina Rademacher, Zak Doric, Dominik Haddad, Aphroditi Mamaligas, Szu-Chi Liao, Rose B Creed, Kohei Kano, Zac Chatterton, Yuhong Fu, Joseph H Garcia, Victoria Vance, Yoshitaka Sei, Anatol Kreitzer, Glenda M Halliday, Alexandra B Nelson, Elyssa B Margolis, Ken Nakamura
Parkinson's disease (PD) is characterized by the death of substantia nigra (SNc) dopamine (DA) neurons, but the pathophysiological mechanisms that precede and drive their death remain unknown. The activity of DA neurons is likely altered in PD, but we understand little about if or how chronic changes in activity may contribute to degeneration. To address this question, we developed a chemogenetic (DREADD) mouse model to chronically increase DA neuron activity, and confirmed this increase using ex vivo electrophysiology...
April 10, 2024: bioRxiv
Vibeke Devold Valderhaug, Ola Huse Ramstad, Rosanne van de Wijdeven, Kristine Heiney, Stefano Nichele, Axel Sandvig, Ioanna Sandvig
Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene have been widely linked to Parkinson's disease, where the G2019S variant has been shown to contribute uniquely to both familial and sporadic forms of the disease. LRRK2-related mutations have been extensively studied, yet the wide variety of cellular and network events related to these mutations remain poorly understood. The advancement and availability of tools for neural engineering now enable modeling of selected pathological aspects of neurodegenerative disease in human neural networks in vitro ...
2024: Frontiers in Cellular Neuroscience
Ian H Harding, Muhammad Ikhsan Nur Karim, Louisa P Selvadurai, Louise A Corben, Martin B Delatycki, Serena Monti, Francesco Saccà, Nellie Georgiou-Karistianis, Sirio Cocozza, Gary F Egan
BACKGROUND: The dentate nuclei of the cerebellum are key sites of neuropathology in Friedreich ataxia (FRDA). Reduced dentate nucleus volume and increased mean magnetic susceptibility, a proxy of iron concentration, have been reported by magnetic resonance imaging studies in people with FRDA. Here, we investigate whether these changes are regionally heterogeneous. METHODS: Quantitative susceptibility mapping data were acquired from 49 people with FRDA and 46 healthy controls...
April 22, 2024: Movement Disorders: Official Journal of the Movement Disorder Society
Mariia Shanaida, Roman Lysiuk, Olha Mykhailenko, Nataliia Hudz, Abdullateef Abdulsalam, Tetiana Gontova, Oleksandra Oleshchuk, Yana Ivankiv, Volodymyr Shanaida, Dmytro Lytkin, Geir Bjørklund
The anti-aging effects of alpha-lipoic acid (αLA), a natural antioxidant synthesized in human tissues, have attracted a growing interest in recent years. αLA is a short- -chain sulfur-containing fatty acid occurring in the mitochondria of all kinds of eukaryotic cells. Both the oxidized disulfide of αLA and its reduced form (dihydrolipoic acid, DHLA) exhibit prominent antioxidant function. The amount of αLA inside the human body gradually decreases with age resulting in various health disorders...
April 19, 2024: Current Medicinal Chemistry
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