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1.
BMC Neurol ; 24(1): 154, 2024 May 07.
Artículo en Inglés | MEDLINE | ID: mdl-38714961

RESUMEN

BACKGROUND: Fragile X-associated tremor/ataxia syndrome (FXTAS) is a neurodegenerative disorder caused by CGG repeat expansion of FMR1 gene. Both FXTAS and neuronal intranuclear inclusion disease (NIID) belong to polyglycine diseases and present similar clinical, radiological, and pathological features, making it difficult to distinguish these diseases. Reversible encephalitis-like attacks are often observed in NIID. It is unclear whether they are presented in FXTAS and can be used for differential diagnosis of NIID and FXTAS. CASE PRESENTATION: A 63-year-old Chinese male with late-onset gait disturbance, cognitive decline, and reversible attacks of fever, consciousness impairment, dizziness, vomiting, and urinary incontinence underwent neurological assessment and examinations, including laboratory tests, electroencephalogram test, imaging, skin biopsy, and genetic test. Brain MRI showed T2 hyperintensities in middle cerebellar peduncle and cerebrum, in addition to cerebellar atrophy and DWI hyperintensities along the corticomedullary junction. Lesions in the brainstem were observed. Skin biopsy showed p62-positive intranuclear inclusions. The possibilities of hypoglycemia, lactic acidosis, epileptic seizures, and cerebrovascular attacks were excluded. Genetic analysis revealed CGG repeat expansion in FMR1 gene, and the number of repeats was 111. The patient was finally diagnosed as FXTAS. He received supportive treatment as well as symptomatic treatment during hospitalization. His encephalitic symptoms were completely relieved within one week. CONCLUSIONS: This is a detailed report of a case of FXTAS with reversible encephalitis-like episodes. This report provides new information for the possible and rare features of FXTAS, highlighting that encephalitis-like episodes are common in polyglycine diseases and unable to be used for differential diagnosis.


Asunto(s)
Ataxia , Encefalitis , Síndrome del Cromosoma X Frágil , Temblor , Humanos , Masculino , Persona de Mediana Edad , Temblor/diagnóstico , Temblor/genética , Temblor/etiología , Síndrome del Cromosoma X Frágil/genética , Síndrome del Cromosoma X Frágil/diagnóstico , Síndrome del Cromosoma X Frágil/complicaciones , Ataxia/diagnóstico , Ataxia/genética , Encefalitis/diagnóstico , Encefalitis/complicaciones , Encefalitis/genética , Encefalitis/patología , Proteína de la Discapacidad Intelectual del Síndrome del Cromosoma X Frágil/genética , Diagnóstico Diferencial , Cuerpos de Inclusión Intranucleares/patología , Enfermedades Neurodegenerativas/diagnóstico , Enfermedades Neurodegenerativas/genética , Enfermedades Neurodegenerativas/complicaciones
2.
Orphanet J Rare Dis ; 19(1): 200, 2024 May 16.
Artículo en Inglés | MEDLINE | ID: mdl-38755691

RESUMEN

BACKGROUND: MT-ATP6 is a mitochondrial gene which encodes for the intramembrane subunit 6 (or A) of the mitochondrial ATP synthase, also known asl complex V, which is involved in the last step of oxidative phosphorylation to produce cellular ATP through aerobic metabolism. Although classically associated with the NARP syndrome, recent evidence highlights an important role of MT-ATP6 pathogenic variants in complicated adult-onset ataxias. METHODS: We describe two unrelated patients with adult-onset cerebellar ataxia associated with severe optic atrophy and mild cognitive impairment. Whole mitochondrial DNA sequencing was performed in both patients. We employed patients' primary fibroblasts and cytoplasmic hybrids (cybrids), generated from patients-derived cells, to assess the activity of respiratory chain complexes, oxygen consumption rate (OCR), ATP production and mitochondrial membrane potential. RESULTS: In both patients, we identified the same novel m.8777 T > C variant in MT-ATP6 with variable heteroplasmy level in different tissues. We identifed an additional heteroplasmic novel variant in MT-ATP6, m.8879G > T, in the patients with the most severe phenotype. A significant reduction in complex V activity, OCR and ATP production was observed in cybrid clones homoplasmic for the m.8777 T > C variant, while no functional defect was detected in m.8879G > T homoplasmic clones. In addition, fibroblasts with high heteroplasmic levelsof m.8777 T > C variant showed hyperpolarization of mitochondrial membranes. CONCLUSIONS: We describe a novel pathogenic mtDNA variant in MT-ATP6 associated with adult-onset ataxia, reinforcing the value of mtDNA screening within the diagnostic workflow of selected patients with late onset ataxias.


Asunto(s)
ATPasas de Translocación de Protón Mitocondriales , Humanos , ATPasas de Translocación de Protón Mitocondriales/genética , ATPasas de Translocación de Protón Mitocondriales/metabolismo , Masculino , Femenino , Persona de Mediana Edad , Ataxia/genética , Ataxia/patología , Italia , ADN Mitocondrial/genética , Adulto , Fibroblastos/metabolismo , Fibroblastos/patología
5.
Sci Rep ; 14(1): 8571, 2024 04 13.
Artículo en Inglés | MEDLINE | ID: mdl-38609436

RESUMEN

This study emphasizes the benefits of open-source software such as DeepLabCut (DLC) and R to automate, customize and enhance data analysis of motor behavior. We recorded 2 different spinocerebellar ataxia type 6 mouse models while performing the classic beamwalk test, tracked multiple body parts using the markerless pose-estimation software DLC and analyzed the tracked data using self-written scripts in the programming language R. The beamwalk analysis script (BAS) counts and classifies minor and major hindpaw slips with an 83% accuracy compared to manual scoring. Nose, belly and tail positions relative to the beam, as well as the angle at the tail base relative to the nose and tail tip were determined to characterize motor deficits in greater detail. Our results found distinct ataxic abnormalities such as an increase in major left hindpaw slips and a lower belly and tail position in both SCA6 ataxic mouse models compared to control mice at 18 months of age. Furthermore, a more detailed analysis of various body parts relative to the beam revealed an overall lower body position in the SCA684Q compared to the CT-longQ27PC mouse line at 18 months of age, indicating a more severe ataxic deficit in the SCA684Q group.


Asunto(s)
Ataxia , Ataxias Espinocerebelosas , Animales , Ratones , Ataxias Espinocerebelosas/genética , Análisis de Datos , Modelos Animales de Enfermedad , Nariz
6.
Artículo en Inglés | MEDLINE | ID: mdl-38617829

RESUMEN

Background: Spinocerebellar ataxia 21 (SCA21) is a rare neurological disorder caused by heterozygous variants in TMEM240. A growing, yet still limited number of reports suggested that hyperkinetic movements should be considered a defining component of the disease. Case Series: We describe two newly identified families harboring the recurrent pathogenic TMEM240 p.Pro170Leu variant. Both index patients and the mother of the first proband developed movement disorders, manifesting as myoclonic dystonia and action-induced dystonia without co-occurring ataxia in one case, and pancerebellar syndrome complicated by action-induced dystonia in the other. We reviewed the literature on TMEM240 variants linked to hyperkinetic disorders, comparing our cases to described phenotypes. Discussion: Adding to prior preliminary observations, our series highlights the relevance of hyperkinetic movements as clinically meaningful features of SCA21. TMEM240 mutation should be included in the differential diagnosis of myoclonic dystonia and ataxia-dystonia syndromes.


Asunto(s)
Distonía , Trastornos Distónicos , Mioclonía , Degeneraciones Espinocerebelosas , Humanos , Distonía/diagnóstico , Distonía/genética , Mioclonía/diagnóstico , Mioclonía/genética , Hipercinesia , Ataxia , Enfermedades Raras , Síndrome , Proteínas de la Membrana
7.
Ann Clin Transl Neurol ; 11(5): 1097-1109, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38590028

RESUMEN

OBJECTIVE: Voluntary upper limb movements are an ecologically important yet insufficiently explored digital-motor outcome domain for trials in degenerative ataxia. We extended and validated the trial-ready quantitative motor assessment battery "Q-Motor" for upper limb movements with clinician-reported, patient-focused, and performance outcomes of ataxia. METHODS: Exploratory single-center cross-sectional assessment in 94 subjects (46 cross-genotype ataxia patients; 48 matched controls), comprising five tasks measured by force transducer and/or position field: Finger Tapping, diadochokinesia, grip-lift, and-as novel implementations-Spiral Drawing, and Target Reaching. Digital-motor measures were selected if they discriminated from controls (AUC >0.7) and correlated-with at least one strong correlation (rho ≥0.6)-to the Scale for the Assessment and Rating of Ataxia (SARA), activities of daily living (FARS-ADL), and the Nine-Hole Peg Test (9HPT). RESULTS: Six movement features with 69 measures met selection criteria, including speed and variability in all tasks, stability in grip-lift, and efficiency in Target Reaching. The novel drawing/reaching tasks best captured impairment in dexterity (|rho9HPT| ≤0.81) and FARS-ADL upper limb items (|rhoADLul| ≤0.64), particularly by kinematic analysis of smoothness (SPARC). Target hit rate, a composite of speed and endpoint precision, almost perfectly discriminated ataxia and controls (AUC: 0.97). Selected measures in all tasks discriminated between mild, moderate, and severe impairment (SARA upper limb composite: 0-2/>2-4/>4-6) and correlated with severity in the trial-relevant mild ataxia stage (SARA ≤10, n = 20). INTERPRETATION: Q-Motor assessment captures multiple features of impaired upper limb movements in degenerative ataxia. Validation with key clinical outcome domains provides the basis for evaluation in longitudinal studies and clinical trial settings.


Asunto(s)
Ataxia , Extremidad Superior , Humanos , Femenino , Masculino , Persona de Mediana Edad , Extremidad Superior/fisiopatología , Estudios Transversales , Adulto , Anciano , Ataxia/fisiopatología , Ataxia/diagnóstico , Desempeño Psicomotor/fisiología , Actividad Motora/fisiología , Índice de Severidad de la Enfermedad
8.
J Integr Neurosci ; 23(4): 79, 2024 Apr 12.
Artículo en Inglés | MEDLINE | ID: mdl-38682229

RESUMEN

The clinical category of immune-mediated cerebellar ataxias (IMCAs) is now recognized after 3 decades of clinical and experimental research. The cerebellum gathers about 60% of neurons in the brain, is enriched in numerous plasticity mechanisms, and presents a large variety of antigens at the neuroglial level: ion channels and related proteins, synaptic adhesion/organizing proteins, transmitter receptors, and glial cells. Cerebellar circuitry is especially vulnerable to immune attacks. After the loss of immune tolerance, IMCAs present in an acute or subacute manner with various combinations of a vestibulocerebellar syndrome (VCS), a cerebellar motor syndrome (CMS), and a cerebellar cognitive affective syndrome/Schmahmann's syndrome (CCAS/SS). IMCAs include gluten ataxia (GA), post-infectious cerebellitis (PIC), Miller Fisher syndrome (MFS), paraneoplastic cerebellar degeneration (PCD), opsoclonus myoclonus syndrome (OMS), anti-glutamic acid decarboxylase (anti-GAD) ataxia, and glial fibrillary acidic protein (GFAP) astrocytopathy (GFAP-A). In addition, multiple sclerosis (MS), acute disseminated encephalomyelitis (ADEM), Behçet disease, and collagen-vascular disorders may also present with cerebellar symptoms when lesions involve cerebellar afferences/efferences. Patients whose clinical profiles do not fit with IMCAs are now gathered in the group of primary autoimmune cerebellar ataxias (PACAs). Latent auto-immune cerebellar ataxia (LACA) refers to a clinical stage with a slow progressive course and a lack of obvious auto-immune background. At a pre-symptomatic stage, patients remain asymptomatic, whereas at the prodromal stage aspecific symptoms occur, announcing the symptomatic neuronal loss. LACA corresponds to a time-window where an intervention could lead to preservation of plasticity mechanisms. Patients may evolve from LACA to PACA and typical IMCAs, highlighting a continuum. Immune ataxias represent a model to elucidate the sequence of events leading to destruction of cerebellar neuronal reserve and develop novel strategies aiming to restore plasticity mechanisms.


Asunto(s)
Ataxia Cerebelosa , Humanos , Ataxia/inmunología , Ataxia/fisiopatología , Enfermedades Autoinmunes del Sistema Nervioso/inmunología , Enfermedades Autoinmunes del Sistema Nervioso/fisiopatología , Ataxia Cerebelosa/inmunología , Ataxia Cerebelosa/fisiopatología
9.
Clin Neurol Neurosurg ; 240: 108260, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38564992

RESUMEN

A 63-year-old man with type 2 diabetes mellitus, alcohol consumption in moderation, and three episodes of hepatic encephalopathy presented with symmetrical lower limb distal weakness, sensory ataxia, thickened palpable nerves, mood disturbances for seven years, and a family history of schizophreniform disorders. Nerve conduction studies showed demyelinating sensorimotor polyradiculoneuropathy. CSF analysis showed mild albumino-cytological dissociation. MRI brain and lumbosacral plexus showed thickened fifth cranial nerves and lumbosacral roots. He was treated with steroids for a provisional diagnosis of chronic inflammatory polyneuropathy and became encephalopathic. EEG showed triphasic waves. Serum ammonia was 201 micrograms/dL. Further evaluation suggested ornithine transcarbamylase (OTC) deficiency. The patient underwent hemodialysis with a low protein diet, rifaximin, and sodium benzoate, with subsequent recovery.


Asunto(s)
Conducción Nerviosa , Enfermedad por Deficiencia de Ornitina Carbamoiltransferasa , Humanos , Masculino , Persona de Mediana Edad , Enfermedad por Deficiencia de Ornitina Carbamoiltransferasa/complicaciones , Enfermedad por Deficiencia de Ornitina Carbamoiltransferasa/diagnóstico , Conducción Nerviosa/fisiología , Ataxia , Polineuropatías/diagnóstico , Imagen por Resonancia Magnética , Diabetes Mellitus Tipo 2/complicaciones , Electroencefalografía , Encefalopatía Hepática/diagnóstico , Diálisis Renal
10.
Mol Biol Rep ; 51(1): 480, 2024 Apr 05.
Artículo en Inglés | MEDLINE | ID: mdl-38578387

RESUMEN

Fragile X syndrome (FXS) is a genetic disorder characterized by mutation in the FMR1 gene, leading to the absence or reduced levels of fragile X Messenger Ribonucleoprotein 1 (FMRP). This results in neurodevelopmental deficits, including autistic spectrum conditions. On the other hand, Fragile X-associated tremor/ataxia syndrome (FXTAS) is a distinct disorder caused by the premutation in the FMR1 gene. FXTAS is associated with elevated levels of FMR1 mRNA, leading to neurodegenerative manifestations such as tremors and ataxia.Mounting evidence suggests a link between both syndromes and mitochondrial dysfunction (MDF). In this minireview, we critically examine the intricate relationship between FXS, FXTAS, and MDF, focusing on potential therapeutic avenues to counteract or mitigate their adverse effects. Specifically, we explore the role of mitochondrial cofactors and antioxidants, with a particular emphasis on alpha-lipoic acid (ALA), carnitine (CARN) and Coenzyme Q10 (CoQ10). Findings from this review will contribute to a deeper understanding of these disorders and foster novel therapeutic strategies to enhance patient outcomes.


Asunto(s)
Síndrome del Cromosoma X Frágil , Enfermedades Mitocondriales , Humanos , Síndrome del Cromosoma X Frágil/tratamiento farmacológico , Síndrome del Cromosoma X Frágil/genética , Temblor/tratamiento farmacológico , Temblor/genética , Antioxidantes/uso terapéutico , Ataxia/tratamiento farmacológico , Ataxia/genética , Proteína de la Discapacidad Intelectual del Síndrome del Cromosoma X Frágil/genética
12.
J Vet Intern Med ; 38(3): 1799-1807, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38609161

RESUMEN

BACKGROUND: Equine herpesvirus myeloencephalopathy (EHM) has severe impact on the sport horse population. OBJECTIVE: Study the influence of EHM on the likelihood of affected horses to return to their previous performance and investigate the association of clinical variables with prognosis. ANIMALS: Twenty-six horses positive for equine herpesvirus type 1 (EHV-1) were admitted to a veterinary teaching hospital (VTH) during a natural EHM outbreak at an international jumping event. METHODS: Data collected from the VTH, the International Equestrian Federation, and surveys completed by the riders and horse owners were retrospectively analyzed. RESULTS: Horses affected by EHM had 68% chance of returning to exercise, and 52.9% were able to achieve their preoutbreak performance level. Horses with an ataxia grade at admission ≥4/5 had an increased fatality rate (P < .05) and 10% chance of reaching their preoutbreak performance level. None of the horses with both vascular and urinary complications returned to their previous performance level. Finally, horses vaccinated against EHV-1 and those with urinary complications had a 71.4% and 43.7% fatality rate, respectively. CONCLUSIONS AND CLINICAL IMPORTANCE: Horses affected by EHM were able to return to their previous performance levels, but certain clinical variables were negatively associated with postoutbreak performance. Ataxia grade upon admission and the development of systemic signs of vasculitis and urinary complications were potential poor prognostic indicators in sport horses. Variables linked to fatality included prior vaccination against EHV-1, ataxia grade upon admission, and the development of urinary complications.


Asunto(s)
Ataxia , Infecciones por Herpesviridae , Herpesvirus Équido 1 , Enfermedades de los Caballos , Animales , Caballos , Enfermedades de los Caballos/virología , Ataxia/veterinaria , Ataxia/virología , Estudios Retrospectivos , Infecciones por Herpesviridae/veterinaria , Infecciones por Herpesviridae/virología , Infecciones por Herpesviridae/complicaciones , Masculino , Femenino , Condicionamiento Físico Animal , Deportes
13.
Urol Clin North Am ; 51(2): 221-232, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38609194

RESUMEN

Detrusor sphincter dyssynergia (DSD) is defined as a detrusor contraction concurrent with an involuntary contraction of the urethral and/or periurethral striated muscles typically occurring in a patient with a spinal cord lesion above the sacral cord. Consequently, high urethral closure pressures during the detrusor contraction leads to high intravesical voiding pressure and large postvoid residuals, which can lead to significant complications in up to 50% of patients if DSD is not treated and followed-up regularly. DSD treatment options are centered around symptomatic management rather that addressing the underlying causative mechanisms.


Asunto(s)
Ataxia , Uretra , Humanos
15.
Sensors (Basel) ; 24(8)2024 Apr 18.
Artículo en Inglés | MEDLINE | ID: mdl-38676203

RESUMEN

FXTAS is a neurodegenerative disorder occurring in some Fragile X Messenger Ribonucleoprotein 1 (FMR1) gene premutation carriers (PMCs) and is characterized by cerebellar ataxia, tremor, and cognitive deficits that negatively impact balance and gait and increase fall risk. Dual-tasking (DT) cognitive-motor paradigms and challenging balance conditions may have the capacity to reveal markers of FXTAS onset. Our objectives were to determine the impact of dual-tasking and sensory and stance manipulation on balance in FXTAS and potentially detect subtle postural sway deficits in FMR1 PMCs who are asymptomatic for signs of FXTAS on clinical exam. Participants with FXTAS, PMCs without FXTAS, and controls underwent balance testing using an inertial sensor system. Stance, vision, surface stability, and cognitive demand were manipulated in 30 s trials. FXTAS participants had significantly greater total sway area, jerk, and RMS sway than controls under almost all balance conditions but were most impaired in those requiring vestibular control. PMCs without FXTAS had significantly greater RMS sway compared with controls in the feet apart, firm, single task conditions both with eyes open and closed (EC) and the feet together, firm, EC, DT condition. Postural sway deficits in the RMS postural sway variability domain in asymptomatic PMCs might represent prodromal signs of FXTAS. This information may be useful in providing sensitive biomarkers of FXTAS onset and as quantitative balance measures in future interventional trials and longitudinal natural history studies.


Asunto(s)
Ataxia , Síndrome del Cromosoma X Frágil , Equilibrio Postural , Temblor , Humanos , Síndrome del Cromosoma X Frágil/genética , Síndrome del Cromosoma X Frágil/fisiopatología , Temblor/genética , Temblor/fisiopatología , Equilibrio Postural/fisiología , Masculino , Persona de Mediana Edad , Femenino , Ataxia/genética , Ataxia/fisiopatología , Anciano , Biomarcadores , Proteína de la Discapacidad Intelectual del Síndrome del Cromosoma X Frágil/genética , Proteína de la Discapacidad Intelectual del Síndrome del Cromosoma X Frágil/metabolismo , Adulto , Síntomas Prodrómicos
16.
Anim Genet ; 55(3): 344-351, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38426585

RESUMEN

Bovine familial convulsions and ataxia (BFCA) is considered an autosomal dominant syndrome with incomplete penetrance. Nine Angus calves from the same herd were diagnosed with BFCA within days of birth. Necropsy revealed cerebellar and spinal cord lesions associated with the condition. Parentage testing confirmed that all affected calves had a common sire. The sire was then bred to 36 cows across two herds using artificial insemination, producing an additional 14 affected calves. The objective of this investigation was to identify hypothesized dominant genetic variation underlying the condition. Whole-genome sequencing was performed on the sire, six affected and seven unaffected paternal half-sibling calves and combined with data from 135 unrelated controls. The sire and five of the six affected calves were heterozygous for a nonsense variant (Chr7 g.12367906C>T, c.5073C>T, p.Arg1681*) in CACNA1A. The other affected calves (N = 8) were heterozygous for the variant but it was absent in the other unaffected calves (N = 7) and parents of the sire. This variant was also absent in sequence data from over 6500 other cattle obtained via public repositories and collaborator projects. The variant in CACNA1A is expressed in the cerebellum of the ataxic calves as detected in the transcriptome and was not differentially expressed compared with controls. The CACNA1A protein is part of a highly expressed cerebellar calcium voltage gated channel. The nonsense variant is proposed to cause haploinsufficiency, preventing proper transmission of neuronal signals through the channel and resulting in BFCA.


Asunto(s)
Ataxia , Canales de Calcio , Enfermedades de los Bovinos , Convulsiones , Animales , Bovinos/genética , Canales de Calcio/genética , Ataxia/veterinaria , Ataxia/genética , Enfermedades de los Bovinos/genética , Convulsiones/veterinaria , Convulsiones/genética , Masculino , Femenino , Secuenciación Completa del Genoma/veterinaria , Genes Dominantes , Mutación
17.
Can Vet J ; 65(3): 227-233, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38434166

RESUMEN

A stray cat, an intact female Japanese domestic shorthair cat of unknown age (suspected to be a young adult), was rescued. The cat was lethargic and thin and had marked skin fragility, delayed wound healing without skin hyperextensibility, and hind limb proprioceptive ataxia and paresis. Survey radiography, computed tomography, and magnetic resonance imaging revealed congenital vertebral anomalies, including thoracolumbar transitional vertebrae, scoliosis resulting from a thoracic lateral wedge-shaped vertebra, and a kinked tail, and a dilated spinal cord central canal. Through nutritional support, the cat's general condition normalized, followed by a gradual and complete improvement of skin features. Whole-genome sequencing was completed; however, no pathogenic genetic variant was identified that could have caused this phenotype, including congenital scoliosis. A skin biopsy obtained 7 y after the rescue revealed no remarkable findings on histopathology or transmission electron microscopy. Based on clinical course and microscopic findings, malnutrition-induced reversible feline skin fragility syndrome (FSFS) was suspected, and nutritional support was considered to have improved the skin condition. Key clinical message: This is the second reported case of presumed malnutrition-induced reversible FSFS and was accompanied by long-term follow-up.


Syndrome de fragilité cutanée réversible induit par la malnutrition soupçonné chez un chat avec des difformités axiales congénitales. Un chat errant, une femelle intacte de race japonaise à poil court et d'âge inconnu (suspecté être une jeune adulte), a été secourue. La chatte était léthargique et maigre, et avait une fragilité marquée de la peau, un retard dans la guérison de plaies sans hyperextensibilité de la peau, et une ataxie proprioceptive et parésie des membres postérieurs. Des radiographies, un examen par tomodensitométrie, et de l'imagerie par résonnance magnétique ont révélé des anomalies congénitales des vertèbres, incluant des vertèbres transitionnelles thoraco-lombaires, une scoliose résultant d'une vertèbre thoracique en forme de coin, une queue pliée, et un canal central de la moelle épinière dilaté. Grâce à un soutien nutritionnel, la condition générale du chat s'est stabilisée, suivi d'une amélioration graduelle et complète des caractéristiques de la peau. Le séquençage du génome complet a été effectué; toutefois, aucune variation génétique pathogénique n'a été identifiée qui aurait pu causer ce phénotype, incluant la scoliose congénitale. Une biopsie cutanée obtenue 7 j après le sauvetage n'a révélé aucune trouvaille spéciale à l'histopathologie ou par microscopie électronique à transmission. Basé sur le déroulement clinique et l'examen microscopique, le syndrome de fragilité cutanée réversible félin induit par la malnutrition (FSFS) était suspecté, et le soutien nutritionnel a été considéré comme ayant amélioré la condition cutanée.Message clinique clé :Ce cas est le deuxième cas rapporté de FSFS induit par la malnutrition soupçonné et a fait l'objet d'un suivi à long terme.(Traduit par Dr Serge Messier).


Asunto(s)
Enfermedades de los Gatos , Desnutrición , Escoliosis , Femenino , Gatos , Animales , Escoliosis/veterinaria , Desnutrición/veterinaria , Ataxia/veterinaria , Biopsia/veterinaria , Enfermedades de los Gatos/diagnóstico , Enfermedades de los Gatos/etiología
18.
Pol J Microbiol ; 73(1): 11-20, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-38437469

RESUMEN

Serratia marcescens is a global opportunistic pathogen. In vitro cytotoxicity of this bacterium is mainly related to metalloprotease serralysin (PrtS) activity. Proteolytic capability varies among the different isolates. Here, we characterized protease production and transcriptional regulators at 37°C of two S. marcescens isolates from bronchial expectorations, HU1848 and SmUNAM836. As a reference strain the insect pathogen S. marcescens Db10 was included. Zymography of supernatant cultures revealed a single (SmUNAM836) or double proteolytic zones (HU1848 and Db10). Mass spectrometry confirmed the identity of PrtS and the serralysin-like protease SlpB from supernatant samples. Elevated proteolytic activity and prtS expression were evidenced in the HU1848 strain through azocasein degradation and qRT-PCR, respectively. Evaluation of transcriptional regulators revealed higher eepR expression in HU1848, whereas cpxR and hexS transcriptional levels were similar between studied strains. Higher eepR expression in HU1848 was further confirmed through an in vivo transcriptional assay. Moreover, two putative CpxR binding motifs were identified within the eepR regulatory region. EMSA validated the interaction of CpxR with both motifs. The evaluation of eepR transcription in a cpxR deletion strain indicated that CpxR negatively regulates eepR. Sequence conservation suggests that regulation of eepR by CpxR is common along S. marcescens species. Overall, our data incorporates CpxR to the complex regulatory mechanisms governing eepR expression and associates the increased proteolytic activity of the HU1848 strain with higher eepR transcription. Based on the global impact of EepR in secondary metabolites production, our work contributes to understanding virulence factors variances across S. marcescens isolates.


Asunto(s)
Ataxia , Condrodisplasia Punctata , Enfermedades Genéticas Ligadas al Cromosoma X , Discapacidad Intelectual Ligada al Cromosoma X , Convulsiones , Serratia marcescens , Humanos , Serratia marcescens/genética , Péptido Hidrolasas/genética
19.
PLoS One ; 19(3): e0299379, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38427622

RESUMEN

Ketamine has gained significant attention as a fast-acting antidepressant. However, ketamine is also associated with undesirable side effects. In our preclinical study, we explored the behavioral effects of ketamine enantiomers at subanesthetic doses. During repeated intermittent treatment, we examined locomotor stimulation and sensitization, ataxia, and expression of natural behaviors (grooming and rearing). Male Wistar rats were subcutaneously treated repeatedly with either 5 mg/kg of R-ketamine or S-ketamine, 15 mg/kg of R-ketamine, S-ketamine or racemic ketamine, 30 mg/kg of racemic ketamine or saline every third day for three weeks (seven treatments overall). After the first treatment, only 15 mg/kg of S-ketamine induced locomotor stimulation, and both 15 mg/kg of S-ketamine and 30 mg/kg of racemic ketamine induced ataxia. Upon repeated administration, doses of 15 mg/kg of R-ketamine, S-ketamine, and racemic ketamine, as well as 30 mg/kg of racemic ketamine, stimulated locomotion. 15 mg/kg of R-ketamine, S-ketamine, and racemic ketamine additionally resulted in locomotor sensitization. The last administration of 15 mg/kg of S-ketamine, 15 mg/kg of racemic ketamine, and 30 mg/kg of racemic ketamine resulted in ataxia. In the case of 15 mg/kg of S-ketamine, ataxic effects were significantly weaker in comparison to the effects from the first administration, indicating tolerance. Natural behaviors were attenuated after 5 and 15 mg/kg of S-ketamine and 15 and 30 mg/kg of racemic ketamine. Neither of the R-ketamine doses produced such an effect. We conclude that S-ketamine has a stronger behavioral effect than R-ketamine.


Asunto(s)
Ketamina , Ratas , Animales , Masculino , Ketamina/efectos adversos , Ratas Wistar , Estereoisomerismo , Ataxia
20.
PLoS One ; 19(3): e0298855, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38507393

RESUMEN

Six years remain to achieve the Sustainable Development Goals (SDGs). Despite some progress, institutional effectiveness for SDG achievement has not been delivered at a national level. Identification and establishment of an institutional framework to operationalise the 2030 Agenda within national plans, giving science-based coordination of SDG implementation a central role, is urgently required to accelerate progress. This paper tackles this challenge. Drawing on literature analysis, it asks: 1) What are the deficiencies in institutional national arrangements that hinder SDG implementation? 2) How can existing institutional deficiencies in SDG implementation be addressed? and 3) How can institutional changes support fast-tracking of SDG implementation processes at national level? Findings show that country-specific horizontal institutional arrangements are usually advanced. However, national visions to improve mainstreaming across decision-making at different levels to enable whole-of-government and whole-of-society approaches to SDG implementation are commonly under-developed. Deficiencies are due to poor systematic engagement of scientific and technical expertise in operational day-to-day communication, as well as in the design, validation, implementation, monitoring and reporting of domestic SDG-related multi-stakeholder actions. Vertical institutional arrangements are complex, and risk resource-consuming, uncoordinated implementation. Our analyses suggest countries may benefit from establishing a national, centralised independent scientific and technical coordinating body for SDG implementation at national level, within existing science-based institutional arrangements. Such a body would not be led by governmental processes but would provide technical support to government agencies. We argue that scientific and technical skills in data and information management and quality control are central to coordinated and evidence-informed support, and could help to accelerate national SDG implementation. Such a supporting body would also enable a more joined-up approach between stakeholders working in the areas of science and technology, government and practice, improving orchestrated science-based actions and their auditing across sectors and stakeholder communities at national and sub-national levels. It would further guide actions to reduce trade-offs within national sustainable development aspirations, and would facilitate consideration of diverse values in advancing towards a durable and just transformative future. Such efforts are vital given the rapidly closing window of time for SDG achievement.


Asunto(s)
Gobierno , Desarrollo Sostenible , Humanos , Agencias Gubernamentales , Ataxia , Comunicación , Objetivos
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