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Hereditary spastic paraplegia

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https://www.readbyqxmd.com/read/28099355/hereditary-spastic-paraplegia-due-to-a-novel-mutation-of-the-reep1-gene-case-report-and-literature-review
#1
Sébastien Richard, Julie Lavie, Guillaume Banneau, Nathalie Voirand, Karine Lavandier, Marc Debouverie
RATIONALE: Hereditary spastic paraplegia (HSP) is a heterogeneous group of diseases little known in clinical practice due to its low prevalence, slow progression, and difficult diagnosis. This results in an underestimation of HSP leading to belated diagnosis and management. In depth diagnosis is based on clinical presentation and identification of genomic mutations. We describe the clinical presentation and pathogeny of HSP through a report of a case due to a novel mutation of the REEP1 gene (SPG31)...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28077174/mutant-hspb1-causes-loss-of-translational-repression-by-binding-to-pcbp1-an-rna-binding-protein-with-a-possible-role-in-neurodegenerative-disease
#2
Thomas Geuens, Vicky De Winter, Nicholas Rajan, Tilmann Achsel, Ligia Mateiu, Leonardo Almeida-Souza, Bob Asselbergh, Delphine Bouhy, Michaela Auer-Grumbach, Claudia Bagni, Vincent Timmerman
The small heat shock protein HSPB1 (Hsp27) is an ubiquitously expressed molecular chaperone able to regulate various cellular functions like actin dynamics, oxidative stress regulation and anti-apoptosis. So far disease causing mutations in HSPB1 have been associated with neurodegenerative diseases such as distal hereditary motor neuropathy, Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis. Most mutations in HSPB1 target its highly conserved α-crystallin domain, while other mutations affect the C- or N-terminal regions or its promotor...
January 11, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28052917/a-mutation-of-ept1-selenoi-underlies-a-new-disorder-of-kennedy-pathway-phospholipid-biosynthesis
#3
Mustafa Y Ahmed, Aisha Al-Khayat, Fathiya Al-Murshedi, Amna Al-Futaisi, Barry A Chioza, J Pedro Fernandez-Murray, Jay E Self, Claire G Salter, Gaurav V Harlalka, Lettie E Rawlins, Sana Al-Zuhaibi, Faisal Al-Azri, Fatma Al-Rashdi, Amaury Cazenave-Gassiot, Markus R Wenk, Fatema Al-Salmi, Michael A Patton, David L Silver, Emma L Baple, Christopher R McMaster, Andrew H Crosby
Mutations in genes involved in lipid metabolism have increasingly been associated with various subtypes of hereditary spastic paraplegia, a highly heterogeneous group of neurodegenerative motor neuron disorders characterized by spastic paraparesis. Here, we report an unusual autosomal recessive neurodegenerative condition, best classified as a complicated form of hereditary spastic paraplegia, associated with mutation in the ethanolaminephosphotransferase 1 (EPT1) gene (now known as SELENOI), responsible for the final step in Kennedy pathway forming phosphatidylethanolamine from CDP-ethanolamine...
January 3, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28018685/coexistence-of-factor-vii-deficiency-and-hereditary-spastic-paraplegia-in-two-siblings
#4
Hortensia De la Corte-Rodriguez, E Carlos Rodriguez-Merchan, M Teresa Alvarez-Roman, Ana L Hernandez-Moreno
We present the case of two patients aged 12 years and 7 years who were referred to our hospital for factor VII deficiency inherited in an autosomal recessive pattern, who had suffered from previous multiple joint haemarthroses. They presented with fine motor symptoms and difficulty in walking. During physical examination we observed neurological symptoms (general hypotonia, muscular hypotrophy, exaggerated tendon reflexes, pes cavus, and spastic gait). Given that the symptoms were not justified by the deficiency of coagulation factor VII and on suspicion of hereditary spastic paraplegia (HSP), tests were carried out...
2016: Case Reports in Hematology
https://www.readbyqxmd.com/read/28008689/doublet-mediated-dna-rearrangement-a-novel-and-potentially-underestimated-mechanism-for-the-formation-of-recurrent-pathogenic-deletions
#5
Amir Jahic, Sophie Hinreiner, Werner Emberger, Ute Hehr, Stephan Zuchner, Christian Beetz
Deletions and duplications of genomic DNA contribute to evolution, phenotypic diversity, and human disease. The underlying mechanisms are incompeletely understood. We identified deletions of exon 10 of the SPAST gene in two unrelated families with hereditary spastic paraplegia. We excluded a founder event, but observed that the breakpoints map to identical repeat regions. These regions likely represent an intragenic 'doublet', i.e. an enigmatic class of local duplications. The fusion sequences for both deletions are compatible with recombination-based as well as with replication-based mechanisms...
December 23, 2016: Human Mutation
https://www.readbyqxmd.com/read/28007911/mitochondrial-morphology-and-cellular-distribution-are-altered-in-spg31-patients-and-are-linked-to-drp1-hyperphosphorylation
#6
Julie Lavie, Román Serrat, Nadège Bellance, Gilles Courtand, Jean-William Dupuy, Christelle Tesson, Isabelle Coupry, Alexis Brice, Didier Lacombe, Alexandra Durr, Giovanni Stevanin, Fréderic Darios, Rodrigue Rossignol, Cyril Goizet, Giovanni Bénard
Hereditary spastic paraplegia, SPG31, is a rare neurological disorder caused by mutations in REEP1 gene encoding the microtubule-interacting protein, REEP1. The mechanism by which REEP1-dependent processes are linked with the disease is unclear. REEP1 regulates the morphology and trafficking of various organelles via interaction with the microtubules. In this study, we collected primary fibroblasts from SPG31 patients to investigate their mitochondrial morphology. We observed that the mitochondrial morphology in patient cells was highly tubular compared with control cells...
December 22, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/28006827/an-automated-image-analysis-system-to-quantify-endosomal-tubulation
#7
Timothy M Newton, Evan Reid
Recycling of cargos from early endosomes requires regulation of endosomal tubule formation and fission. This regulation is disrupted in cells depleted of the microtubule severing enzyme spastin, causing elongation of endosomal tubules and mis-trafficking of recycling endosomal cargos such as the transferrin receptor. Spastin is encoded by SPAST, mutations in which are the most frequent cause of autosomal dominant hereditary spastic paraplegia, a condition characterised by a progressive loss of lower limb function resulting from upper motor neuron axonopathy...
2016: PloS One
https://www.readbyqxmd.com/read/27957547/clinical-and-genetic-study-of-hereditary-spastic-paraplegia-in-canada
#8
Nicolas Chrestian, Nicolas Dupré, Ziv Gan-Or, Anna Szuto, Shiyi Chen, Anil Venkitachalam, Jean-Denis Brisson, Jodi Warman-Chardon, Sohnee Ahmed, Setareh Ashtiani, Heather MacDonald, Noreen Mohsin, Karim Mourabit-Amari, Pierre Provencher, Kym M Boycott, Dimitri J Stavropoulos, Patrick A Dion, Peter N Ray, Oksana Suchowersky, Guy A Rouleau, Grace Yoon
OBJECTIVE: To describe the clinical, genetic, and epidemiologic features of hereditary spastic paraplegia (HSP) in Canada and to determine which clinical, radiologic, and genetic factors determine functional outcomes for patients with HSP. METHODS: We conducted a multicenter observational study of patients who met clinical criteria for the diagnosis of HSP in the provinces of Alberta, Ontario, and Quebec from 2012 to 2015. Characteristics of the participants were analyzed using descriptive statistics...
February 2017: Neurology. Genetics
https://www.readbyqxmd.com/read/27956894/modeling-axonal-defects-in-hereditary-spastic-paraplegia-with-human-pluripotent-stem-cells
#9
Kyle R Denton, Chongchong Xu, Harsh Shah, Xue-Jun Li
BACKGROUND: Cortical motor neurons, also known as upper motor neurons, are large projection neurons whose axons convey signals to lower motor neurons to control the muscle movements. Degeneration of cortical motor neuron axons is implicated in several debilitating disorders, including hereditary spastic paraplegia (HSP) and amyotrophic lateral sclerosis (ALS). Since the discovery of the first HSP gene, SPAST that encodes spastin, over 70 distinct genetic loci associated with HSP have been identified...
October 2016: Frontiers in Biology
https://www.readbyqxmd.com/read/27935820/s113r-mutation-in-slc33a1-leads-to-neurodegeneration-and-augmented-bmp-signaling-in-a-mouse-model
#10
Pingting Liu, Baichun Jiang, Jian Ma, Pengfei Lin, Yinshuai Zhang, Changshun Shao, Wenjie Sun, Yaoqin Gong
The S113R mutation (c.339T>G) (MIM #603690.0001) in SLC33A1 (MIM #603690), an ER membrane acetyl-CoA transporter, has been previously identified in patients with hereditary spastic paraplegia type 42 (SPG42; MIM #612539). SLC33A1 has also been shown to inhibit bone morphogenetic protein (BMP) signaling pathway in zebrafish. To better understand the function of SLC33A1, we generated and characterized Slc33a1(S113R) knock-in mice. Homozygous Slc33a1(S113R) mutant mice were embryonic lethal, while heterozygous Slc33a1 mutant mice (Slc33a1(wt/mut)) exhibited behavioral abnormalities and central neurodegeneration, which is consistent with HSP phenotypes...
November 24, 2016: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/27919248/bone-mineral-density-in-patients-with-multiple-sclerosis-hereditary-ataxia-or-hereditary-spastic-paraplegia-after-at-least-10%C3%A2-years-of-disease-a-case-control-study
#11
Cecilia Smith Simonsen, Elisabeth Gulowsen Celius, Cathrine Brunborg, Chantal Tallaksen, Erik Fink Eriksen, Trygve Holmøy, Stine Marit Moen
BACKGROUND: Although disability is considered the main cause of low bone mineral density (BMD) in multiple sclerosis (MS), other factors related to the disease process or treatment could also be involved. The aim of this study was to assess whether patients with MS are more likely to develop low BMD (osteopenia or osteoporosis) than patients with the non-inflammatory neurological diseases Hereditary Spastic Paraplegia (HSP) and Hereditary Ataxia (HA). METHODS: We performed a case control study comparing BMD (spine, hip and total body) and biochemical measures of bone metabolism in 91 MS patients and 77 patients with HSP or HA, matched for age, gender and disability...
December 5, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27911893/the-mitochondrial-m-aaa-protease-prevents-demyelination-and-hair-greying
#12
Shuaiyu Wang, Julie Jacquemyn, Sara Murru, Paola Martinelli, Esther Barth, Thomas Langer, Carien M Niessen, Elena I Rugarli
The m-AAA protease preserves proteostasis of the inner mitochondrial membrane. It ensures a functional respiratory chain, by controlling the turnover of respiratory complex subunits and allowing mitochondrial translation, but other functions in mitochondria are conceivable. Mutations in genes encoding subunits of the m-AAA protease have been linked to various neurodegenerative diseases in humans, such as hereditary spastic paraplegia and spinocerebellar ataxia. While essential functions of the m-AAA protease for neuronal survival have been established, its role in adult glial cells remains enigmatic...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27909242/beneficial-effects-of-rapamycin-in-a-drosophila-model-for-hereditary-spastic-paraplegia
#13
Shiyu Xu, Michael Stern, James A McNew
The locomotor deficits in the hereditary spastic paraplegias (HSPs) reflect degeneration of upper motor neurons, but the mechanisms underlying this neurodegeneration are unknown. We established a Drosophila model for the HSP atlastin (atl), which encodes an ER fusion protein. Here we show that neuronal atl loss causes degeneration of specific thoracic muscles that is preceded by other pathologies including accumulation of aggregates containing poly-ubiquitin (poly-UB), increased generation of reactive oxygen species, and activation of the JNK/Foxo stress response pathway...
December 1, 2016: Journal of Cell Science
https://www.readbyqxmd.com/read/27900367/whole-genome-sequencing-of-two-probands-with-hereditary-spastic-paraplegia-reveals-novel-splice-donor-region-variant-and-known-pathogenic-variant-in-spg11
#14
Allen Chi-Shing Yu, Anne Yin-Yan Chan, Wing Chi Au, Yun Shen, Ting Fung Chan, Ho-Yin Edwin Chan
Hereditary spastic paraplegias (HSPs) are a group of heterogeneous neurodegenerative disorders, which are often presented with overlapping phenotypes such as progressive paraparesis and spasticity. To assist the diagnosis of HSP subtypes, next-generation sequencing is often used to provide supporting evidence. In this study, we report the case of two probands from the same family with HSP symptoms, including bilateral lower limb weakness, unsteady gait, cognitive decline, dysarthria, and slurring of speech since the age of 14...
November 2016: Cold Spring Harbor Molecular Case Studies
https://www.readbyqxmd.com/read/27879220/generation-of-induced-pluripotent-stem-cells-ipscs-from-a-hereditary-spastic-paraplegia-patient-carrying-a-homozygous-y275x-mutation-in-cyp7b1-spg5
#15
Stefan Hauser, Philip Höflinger, Yvonne Theurer, Tim W Rattay, Ludger Schöls
Skin fibroblasts were obtained from a 47-year-old hereditary spastic paraplegia patient carrying a homozygous mutation Y275X in CYP7B1 (Cytochrome P450, Family 7, Subfamily B, Polypeptide 1), responsible for causing hereditary spastic paraplegia type 5 (SPG5). Induced pluripotent stem cells (iPSCs) were generated by transfection with episomal plasmids carrying hOCT4, hSOX2, hKLF4, hL-MYC and hLIN28. The generated line iPS-SPG5-Y275X was transgene-free, retained the specific mutation with no additional genomic aberrations, expressed pluripotency markers and was able to differentiate into cells of all germ layers in vitro...
September 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27879216/generation-of-induced-pluripotent-stem-cells-ipscs-from-a-hereditary-spastic-paraplegia-patient-carrying-a-homozygous-r486c-mutation-in-cyp7b1-spg5
#16
Philip Höflinger, Yvonne Theurer, Rebecca Schüle, Ludger Schöls, Stefan Hauser
Skin fibroblasts were obtained from a 47-year-old hereditary spastic paraplegia patient carrying a homozygous mutation R486C in CYP7B1 (Cytochrome P450, Family 7, Subfamily B, Polypeptide 1), responsible for causing hereditary spastic paraplegia type 5 (SPG5). Induced pluripotent stem cells (iPSCs) were generated by transfection with episomal plasmids carrying hOCT4, hSOX2, hKLF4, hL-MYC and hLIN28. The generated line iPS-SPG5-R486C was transgene-free, retained the specific mutation with no additional genomic aberrations, expressed pluripotency markers and was able to differentiate into cells of all germ layers in vitro...
September 2016: Stem Cell Research
https://www.readbyqxmd.com/read/27872255/proteolipid-protein-deficient-myelin-promotes-axonal-mitochondrial-dysfunction-via-altered-metabolic-coupling
#17
Xinghua Yin, Grahame J Kidd, Nobuhiko Ohno, Guy A Perkins, Mark H Ellisman, Chinthasagar Bastian, Sylvain Brunet, Selva Baltan, Bruce D Trapp
Hereditary spastic paraplegia (HSP) is a neurological syndrome characterized by degeneration of central nervous system (CNS) axons. Mutated HSP proteins include myelin proteolipid protein (PLP) and axon-enriched proteins involved in mitochondrial function, smooth endoplasmic reticulum (SER) structure, and microtubule (MT) stability/function. We characterized axonal mitochondria, SER, and MTs in rodent optic nerves where PLP is replaced by the peripheral nerve myelin protein, P0 (P0-CNS mice). Mitochondrial pathology and degeneration were prominent in juxtaparanodal axoplasm at 1 mo of age...
November 21, 2016: Journal of Cell Biology
https://www.readbyqxmd.com/read/27866730/hereditary-neuropathies-an-update
#18
REVIEW
T Stojkovic
Hereditary neuropathies are the most common inherited neuromuscular diseases. Charcot-Marie-Tooth (CMT) disease represents the most common form with an average prevalence ranging from 1/2500 to 1/1200, depending on the studies. To date and with the advances of the latest generation sequencing, more than 80 genes have been identified. Although the common clinical phenotype comprises a progressive distal muscle weakness and sensory loss, foot deformities and decreased or absent tendon reflexes, clinical and electrophysiological phenotypes exhibit great variability...
December 2016: Revue Neurologique
https://www.readbyqxmd.com/read/27857457/multiparametric-3t-mri-evaluation-of-hereditary-spastic-paraplegia-a-case-report
#19
Sonam Priya, Naznin Siddique, Ruchira Das, Archana Singh
Hereditary spastic paraplegia (HSP) is a rare heterogeneous group of familial neurodegenerative disorders characterized by degeneration of the corticospinal tracts and posterior column of the spinal cord. Previously described radiological findings included nonspecific brain abnormalities such as brain atrophy and white matter lesions, as well as atrophy of the corpus callosum and spinal cord. Magnetic resonance spectroscopy may reveal reduced concentrations of normal brain metabolites and elevated levels of myoinositol...
July 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/27824013/novel-mutations-in-endoplasmic-reticulum-lipid-raft-associated-protein-2-gene-cause-pure-hereditary-spastic-paraplegia-type-18
#20
Wo-Tu Tian, Jun-Yi Shen, Xiao-Li Liu, Tian Wang, Xing-Hua Luan, Hai-Yan Zhou, Sheng-Di Chen, Xiao-Jun Huang, Li Cao
No abstract text is available yet for this article.
2016: Chinese Medical Journal
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