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A high-fidelity CRISPR-Cas13 system improves abnormalities associated with C9ORF72-linked ALS/FTD.
Nat Commun
January 2025
Department of Bioengineering, The Grainger College of Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.
An abnormal expansion of a GGGGCC (GC) hexanucleotide repeat in the C9ORF72 gene is the most common genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), two debilitating neurodegenerative disorders driven in part by gain-of-function mechanisms involving transcribed forms of the repeat expansion. By utilizing a Cas13 variant with reduced collateral effects, we develop here a high-fidelity RNA-targeting CRISPR-based system for C9ORF72-linked ALS/FTD. When delivered to the brain of a transgenic rodent model, this Cas13-based platform curbed the expression of the GC repeat-containing RNA without affecting normal C9ORF72 levels, which in turn decreased the formation of RNA foci, reduced the production of a dipeptide repeat protein, and reversed transcriptional deficits.
View Article and Find Full Text PDF[Effect of moxibustion on learning-memory ability in rats with vascular dementia based on hippocampal Mst1/NF-κB p65 pathway].
Zhongguo Zhen Jiu
January 2025
Affiliated Hospital of Nanjing University of Chinese Medicine/Jiangsu Provincial Hospital of TCM, Nanjing 210029, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province.
Objective: To observe the effects of (transforming stasis and unblocking collaterals) moxibustion on learning-memory ability and hippocampal mammalian sterile 20-like kinase 1 (Mst1)/nuclear factor κB (NF-κB) p65 pathway related to inflammatory response in rats with vascular dementia (VD).
Methods: A total of 60 male Wistar rats of SPF grade were randomly divided into a sham operation group (12 rats) and a modeling group (48 rats). VD model was established by the method of modified bilateral common carotid artery permanent ligation in the modeling group.
Association Between Folate Metabolism Risk, Collateral Circulation, and Hemorrhagic Risk in Moyamoya Disease.
Transl Stroke Res
January 2025
Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, No.119 Nan Si Huan Xi Road, Fengtai District, Beijing, China.
Methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR) polymorphisms are known risk factors for vascular diseases due to the impact on folate metabolism dysfunction and homocysteine (Hcy) accumulation. This study aimed to investigate the association between folate metabolism risk and hemorrhagic risk in moyamoya disease (MMD). In this prospective study, we enrolled 350 MMD patients with complete genotype data for MTHFR and MTRR.
View Article and Find Full Text PDFQ241R mutation of Braf causes neurological abnormalities in a mouse model of cardio-facio-cutaneous syndrome, independent of developmental malformations.
Hum Mol Genet
January 2025
Department of Laboratory Sciences, Gunma University Graduate School of Health Sciences, 3-39-22 Showa-machi, Maebashi, Gunma 371-8514, Japan.
Constitutively active mutants of BRAF cause cardio-facio-cutaneous (CFC) syndrome, characterized by growth and developmental defects, cardiac malformations, facial features, cutaneous manifestations, and mental retardation. An animal model of human CFC syndrome, the systemic BrafQ241R/+ mutant mouse, has been reported to exhibit multiple CFC syndrome-like phenotypes. In this study, we analyzed the effects of Braf mutations on neural function, separately from their effects on developmental processes.
View Article and Find Full Text PDFReperfusion of Pulmonary Arteriovenous Malformations Treated by Catheter Embolization.
J Clin Med
December 2024
Clinic of Diagnostic and Interventional Radiology, Saarland University Medical Center, 66421 Homburg, Germany.
The aim of this study was to evaluate patients with hereditary hemorrhagic telangiectasia (HHT) for the potential reperfusion of pulmonary arteriovenous malformations (PAVM) treated by catheter embolization using coils or embolization plugs and to analyze causes of possible reperfusion in order to further improve treatment. This retrospective study analyzed the data of 345 patients who underwent screening for pulmonary arteriovenous malformations in cases of suspected or confirmed HHT (Osler's disease). Of these, 118 patients with PAVM that underwent catheter embolization and had at least one follow-up study were included in our study and evaluated for potential reperfusion.
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