Tiyasha De, Pooja Sharma, Bharathram Upilli, A Vivekanand, Shreya Bari, Akhilesh Kumar Sonakar, Achal Kumar Srivastava, Mohammed Faruq
BACKGROUND: The ethnic diversity of India provides a unique opportunity to study the history of the origin of mutations of genetic disorders. Spinocerebellar ataxia type 27B (SCA27B), a recently identified dominantly inherited cerebellar disorder is caused by GAA-repeat expansions in intron 1 of Fibroblast Growth Factor 14 (FGF14). Predominantly reported in the European population, we aimed to screen this mutation and study the founder haplotype of SCA27B in Indian ataxia patients. METHODS: We have undertaken screening of GAA repeats in a large Indian cohort of ~ 1400 uncharacterised ataxia patients and kindreds and long-read sequencing-based GAA repeat length assessment...
July 8, 2024: Neurogenetics
Yang Xu, XiaoDan Teng, Ming Wei, Yang Liu
Our objective is to explore the protective effect of Dexmedetomidine on brain apoptosis and its mechanism through TREK-1 pathway. Forty male Sprague-Dawley rats were allocated into four groups: Sham, Cerebral Ischemia/Reperfusion Injury (CIRI), 50 µg/kg Dex, and 100 µg/kg Dex. A rat model of middle cerebral artery occlusion (MCAO) was employed to simulate cerebral embolism. Primary cortical neurons were exposed to Dex for 48 h, with some receiving additional treatment with 100 µM yohimbine hydrochloride (YOH) or TREK-1 small interfering RNA (siRNA)...
July 8, 2024: Neurogenetics
Mehdi Agha Gholizadeh, Farkhondeh Behjati, Saghar Ghasemi Firouzabadi, Erfan Heidari, Ehsan Razmara, Navid Almadani, Ali Sharifi Zarchi, Masoud Garshasbi
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition with considerable genetic heterogeneity. The disorder is clinically diagnosed based on DSM-5 criteria, featuring deficits in social communication and interaction, along with restricted and repetitive behaviours. Here, we performed whole-genome sequencing (WGS) on four individuals with ASD from two multiplex families (MPX), where more than one individual is affected, to identify potential single nucleotide variants (SNVs) and structural variants (SVs) in coding and non-coding regions...
July 8, 2024: Neurogenetics
Jan Postberg, Michèle Tina Schubert, Vincent Nin, Lukas Wagner, Martina Piefke
The debate surrounding nature versus nurture remains a central question in neuroscience, psychology, and in psychiatry, holding implications for both aging processes and the etiology of mental illness. Epigenetics can serve as a bridge between genetic predisposition and environmental influences, thus offering a potential avenue for addressing these questions. Epigenetic clocks, in particular, offer a theoretical framework for measuring biological age based on DNA methylation signatures, enabling the identification of disparities between biological and chronological age...
July 5, 2024: Neurogenetics
Hong Cheng, Yingjie Zhao, Xiaoli Hou, Fang Ling, Jing Wang, Yixia Wang, Yasen Cao
Glioma, a type of brain tumor, poses significant challenges due to its heterogeneous nature and limited treatment options. Interferon-related genes (IRGs) have emerged as potential players in glioma pathogenesis, yet their expression patterns and clinical implications remain to be fully elucidated. We conducted a comprehensive analysis to investigate the expression patterns and functional enrichment of IRGs in glioma. This involved constructing protein-protein interaction networks, heatmap analysis, survival curve plotting, diagnostic and prognostic assessments, differential expression analysis across glioma subgroups, GSVA, immune infiltration analysis, and drug sensitivity analysis...
July 3, 2024: Neurogenetics
Hande Ozkalayci, Elcin Bora, Tufan Cankaya, Mehmet Kocabey, Nadide Cemre Zubari, Uluc Yis, Ozlem Giray Bozkaya, Serkan Turan, Aynur Pekcanlar Akay, Ahmet Okay Caglayan, Ayfer Ulgenalp
Duchenne muscular dystrophy (DMD) and Becker muscular dystrophy (BMD) are X-linked recessive allelic muscle diseases caused by dystrophin gene mutations. Eight hundred thirty-seven patients admitted between 1997 and 2022 were included in the study. Two hundred twenty patients were analyzed by multiplex PCR (mPCR) alone. Five hundred ninety-five patients were investigated by multiplex ligation-dependent probe amplification (MLPA), and 54 patients were examined by sequencing. Deletion was detected in 60% (132/220) of the cases in the mPCR group only and in 58...
June 8, 2024: Neurogenetics
Elka Stefanova, Ana Marjanović, Valerija Dobričić, Gorana Mandić-Stojmenović, Tanja Stojković, Marija Branković, Maksim Šarčević, Ivana Novaković, Vladimir S Kostić
Most of the heritability in frontotemporal dementia (FTD) is accounted for by autosomal dominant hexanucleotide expansion in the chromosome 9 open reading frame 72 (C9orf72), pathogenic/likely pathogenic variants in progranulin (GRN), and microtubule-associated protein tau (MAPT) genes. Until now, there has been no systematic analysis of these genes in the Serbian population. Herein, we assessed the frequency of the C9orf72 expansion, pathogenic/likely pathogenic variants in GRN and MAPT in a well-characterized group of 472 subjects (FTD, Alzheimer's disease - AD, mild cognitive impairment - MCI, and unspecified dementia - UnD), recruited in the Memory Center, Neurology Clinic, University Clinical Center of Serbia...
June 7, 2024: Neurogenetics
Taiwo Ooreoluwa Ojo, Oluwabamise Emmanuel Elegbeleye, Olawale Quadri Bolaji, Temitope Isaac Adelusi, Elijah Kolawole Oladipo, Matthew Oluwaseun Olawuyi, Bukola Oluwafunmilayo Afolayan, Adegboye Oyewole Oyaronbi, Taiwo Temitope Ogunjobi, Moyosoluwa Precious Oyewole, Kolade Pelumi Folorunso, Abdeen Tunde Ogunlana
Multiple sclerosis (MS), an intricate neurological disorder, continues to challenge our understanding of the pivotal interplay between the immune system and the central nervous system (CNS). This condition arises from the immune system's misdirected attack on nerve fiber protection, known as myelin sheath, alongside nerve fibers themselves. This enigmatic condition, characterized by demyelination and varied clinical manifestations, prompts exploration into its multifaceted etiology and potential therapeutic avenues...
May 29, 2024: Neurogenetics
Saima, Amjad Khan, Sajid Ali, Jiuhong Jiang, Zhichao Miao, Atif Kamil, Shahid Niaz Khan, Stefan T Arold
Primary microcephaly is a rare neurogenic and genetically heterogeneous disorder characterized by significant brain size reduction that results in numerous neurodevelopmental disorders (NDD) problems, including mild to severe intellectual disability (ID), global developmental delay (GDD), seizures and other congenital malformations. This disorder can arise from a mutation in genes involved in various biological pathways, including those within the brain. We characterized a recessive neurological disorder observed in nine young adults from five independent consanguineous Pakistani families...
May 25, 2024: Neurogenetics
Lucas Cunha Barbosa, Gabriel Cardoso Machado, Manoela Heringer, Valéria Pereira Ferrer
Glioblastomas (GBM) are aggressive tumors known for their heterogeneity, rapid proliferation, treatment resistance, and extensive vasculature. Angiogenesis, the formation of new vessels, involves endothelial cell (EC) migration and proliferation. Various extracellular matrix (ECM) molecules regulate EC survival, migration, and proliferation. Culturing human brain EC (HBMEC) on GBM-derived ECM revealed a decrease in EC numbers compared to controls. Through in silico analysis, we explored ECM gene expression differences between GBM and brain normal glia cells and the impact of GBM microenvironment on EC ECM transcripts...
May 22, 2024: Neurogenetics
Wiktoria Radziwonik-Fraczyk, Ewelina Elert-Dobkowska, Marek Karpinski, Jacek Pilch, Karolina Ziora-Jakutowicz, Jolanta Kubalska, Dominika Szczesniak, Iwona Stepniak, Jacek Zaremba, Anna Sulek
Neuromuscular disorders (NMDs) include a wide range of diseases affecting the peripheral nervous system. The genetic diagnoses are increasingly obtained with using the next generation sequencing (NGS). We applied the custom-design targeted NGS panel including 89 genes, together with genotyping and multiplex ligation-dependent probe amplification (MLPA) to identify a genetic spectrum of NMDs in 52 Polish patients. As a result, the genetic diagnosis was determined by NGS panel in 29 patients so its diagnostic utility is estimated at 55...
May 17, 2024: Neurogenetics
Carlo Alberto Cesaroni, Gianluca Contrò, Carlotta Spagnoli, Federica Cancelliere, Stefano Giuseppe Caraffi, Alberta Leon, Camilla Stefanini, Daniele Frattini, Susanna Rizzi, Anna Cavalli, Livia Garavelli, Carlo Fusco
Aminoacyl-tRNA synthetases (ARSs) aminoacylate tRNA molecules with their cognate amino acid, enabling information transmission and providing substrates for protein biosynthesis. They also take part in nontranslational functions, mediated by the presence of other proteins domains. Mutations in ARS genes have been described as responsive to numerous factors, including neurological, autoimmune, and oncological. Variants of the ARS genes, both in heterozygosity and homozygosity, have been reported to be responsible for different pathological pictures in humankind...
April 23, 2024: Neurogenetics
Flavia Palombo, Alessandro Vaisfeld, Valentina Concetta Tropeano, Danara Ormanbekova, Isabelle Bacchi, Claudio Fiorini, Adelaide Peruzzi, Luca Morandi, Rocco Liguori, Valerio Carelli, Giovanni Rizzo
The reduced penetrance of TBP intermediate alleles and the recently proposed possible digenic TBP/STUB1 inheritance raised questions on the possible mechanism involved opening a debate on the existence of SCA48 as a monogenic disorder. We here report clinical and genetic results of two apparently unrelated patients carrying the same STUB1 variant(c.244G > T;p.Asp82Tyr) with normal TBP alleles and a clinical picture fully resembling SCA48, including cerebellar ataxia, dysarthria and mild cognitive impairment...
April 16, 2024: Neurogenetics
Valentinus Besin, Farizky Martriano Humardani, Trilis Yulianti, Sulistyo Emantoko Dwi Putra, Rina Triana, Matthew Justyn
Vascular risk factors, including diabetes, hypertension, hyperlipidemia, and obesity, pose significant health threats with implications extending to neuropsychiatric disorders such as stroke and Alzheimer's disease. The Asian population, in particular, appears to be disproportionately affected due to unique genetic predispositions, as well as epigenetic factors such as dietary patterns and lifestyle habits. Existing management strategies often fall short of addressing these specific needs, leading to greater challenges in prevention and treatment...
April 16, 2024: Neurogenetics
Afsaneh Bazgir, Mehdi Agha Gholizadeh, Seyyed Mohammad Kahani, Ali Reza Tavasoli, Masoud Garshasbi
Developmental and epileptic encephalopathy (DEEs) (OMIM#618,328) is characterized by seizures, hypotonia, and brain abnormalities, often arising from mutations in genes crucial for brain function. Among these genes, GLS stands out due to its vital role in the central nervous system (CNS), with homozygous variants potentially causing DEE type 71. Using Whole Exome Sequencing (WES) on a patient exhibiting symptoms of epileptic encephalopathy, we identified a novel homozygous variant, NM_014905.5:c.1849G > T; p...
April 15, 2024: Neurogenetics
Federico Emanuele Pozzi, Vittoria Aprea, Ginevra Giovannelli, Francesca Lattuada, Cinzia Crivellaro, Francesca Bertola, Veronica Castelnovo, Elisa Canu, Massimo Filippi, Ildebrando Appollonio, Carlo Ferrarese, Federica Agosta, Lucio Tremolizzo
We present an in-depth clinical and neuroimaging analysis of a family carrying the MAPT K298E mutation associated with frontotemporal dementia (FTD). Initial identification of this mutation in a single clinical case led to a comprehensive investigation involving four affected siblings allowing to elucidate the mutation's phenotypic expression.A 60-year-old male presented with significant behavioral changes and progressed rapidly, exhibiting speech difficulties and cognitive decline. Neuroimaging via FDG-PET revealed asymmetrical frontotemporal hypometabolism...
April 9, 2024: Neurogenetics
Marija Brankovic, Vukan Ivanovic, Ivana Basta, Rin Khang, Eugene Lee, Zorica Stevic, Branislav Ralic, Radoje Tubic, GoHun Seo, Vladana Markovic, Ivo Bozovic, Marina Svetel, Ana Marjanovic, Nikola Veselinovic, Sarlota Mesaros, Milena Jankovic, Dusanka Savic-Pavicevic, Zita Jovin, Ivana Novakovic, Hane Lee, Stojan Peric
Hereditary spastic paraplegia (HSP) is a group of neurodegenerative diseases with a high genetic and clinical heterogeneity. Numerous HSP patients remain genetically undiagnosed despite screening for known genetic causes of HSP. Therefore, identification of novel variants and genes is needed. Our previous study analyzed 74 adult Serbian HSP patients from 65 families using panel of the 13 most common HSP genes in combination with a copy number variation analysis. Conclusive genetic findings were established in 23 patients from 19 families (29%)...
March 19, 2024: Neurogenetics
Federica Teutonico, Clara Volpe, Alice Proto, Ilaria Costi, Ugo Cavallari, Paola Doneda, Maria Iascone, Luisella Sturiale, Rita Barone, Stefano Martinelli, Aglaia Vignoli
Mannosyl-oligosaccharide glucosidase - congenital disorder of glycosylation (MOGS-CDG) is determined by biallelic mutations in the mannosyl-oligosaccharide glucosidase (glucosidase I) gene. MOGS-CDG is a rare disorder affecting the processing of N-Glycans (CDG type II) and is characterized by prominent neurological involvement including hypotonia, developmental delay, seizures and movement disorders. To the best of our knowledge, 30 patients with MOGS-CDG have been published so far. We described a child who is compound heterozygous for two novel variants in the MOGS gene...
March 18, 2024: Neurogenetics
Sokhna Haissatou Diaw, Sylvie Delcambre, Christoph Much, Fabian Ott, Vladimir S Kostic, Agata Gajos, Alexander Münchau, Simone Zittel, Hauke Busch, Anne Grünewald, Christine Klein, Katja Lohmann
Dystonia due to pathogenic variants in the THAP1 gene (DYT-THAP1) shows variable expressivity and reduced penetrance of ~ 50%. Since THAP1 encodes a transcription factor, modifiers influencing this variability likely operate at the gene expression level. This study aimed to assess the transferability of differentially expressed genes (DEGs) in neuronal cells related to pathogenic variants in the THAP1 gene, which were previously identified by transcriptome analyses. For this, we performed quantitative (qPCR) and Digital PCR (dPCR) in cultured fibroblasts...
March 18, 2024: Neurogenetics
Zhi-Jian Lin, Jun-Wei He, Sheng-Yin Zhu, Li-Hong Xue, Jian-Feng Zheng, Li-Qin Zheng, Bi-Xia Huang, Guo-Zhang Chen, Peng-Xing Lin
Twin and family studies have established the genetic contribution to idiopathic generalized epilepsy (IGE). The genetic architecture of IGE is generally complex and heterogeneous, and the majority of the genetic burden in IGE remains unsolved. We hypothesize that gene-gene interactions contribute to the complex inheritance of IGE. CNTN2 (OMIM* 615,400) variants have been identified in cases with familial adult myoclonic epilepsy and other epilepsies. To explore the gene-gene interaction network in IGE, we took the CNTN2 gene as an example and investigated its co-occurrent genetic variants in IGE cases...
March 9, 2024: Neurogenetics
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