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1.
J Gen Intern Med ; 38(15): 3329-3338, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37254012

RESUMEN

BACKGROUND: The risk of dysphagia increases with age, affecting up to 33% of adults over the age of 65. Older adults with dysphagia are at increased risk for negative physical health outcomes such as aspiration pneumonia and death. However, the relationship between dysphagia and psychosocial health is uncertain in this population. OBJECTIVE: We aimed to assess the associations between dysphagia and psychosocial health among older adults (≥ 65) with self-reported dysphagia. DESIGN: We performed a cross-sectional assessment of the National Health and Aging Trends Study (NHATS) conducted in 2019. MAIN MEASURES: Weighted logistic and linear regression models were used to assess the relationship between self-reported dysphagia and psychosocial health using established patient-reported outcome measures including those for depression, anxiety, and social isolation previously used in NHATS analyses, while adjusting for demographics, comorbid conditions, and risk factors for dysphagia identified by purposeful selection. KEY RESULTS: Among the 4041 adults in this cohort, almost half (40%) were between 70 and 74 years old, more than half were female (55%), and a significantly higher proportion were White, non-Hispanic respondents (78.1%, p < 0.01) compared with other races and ethnicities. There were 428 (10.5%) respondents reporting dysphagia symptoms within the previous month. In the multivariable model, dysphagia was associated with significantly increased odds of anxiety (OR 1.33 [1.06, 1.67]) and a significantly decreased sense of well-being (coefficient - 1.10 [- 1.66, - 0.54]), but no association was detected for social isolation. CONCLUSIONS: When accounting for factors associated with underlying physical health status, self-reported dysphagia is independently associated with negative psychosocial health and warrants attention by healthcare providers. Future studies should aim to identify causal factors and the extent to which interventions may mitigate these factors.


Asunto(s)
Trastornos de Deglución , Vida Independiente , Humanos , Femenino , Anciano , Masculino , Autoinforme , Trastornos de Deglución/epidemiología , Estudios Transversales , Aislamiento Social
2.
Mol Genet Metab ; 135(3): 179-185, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-35123877

RESUMEN

PURPOSE: Thoroughly phenotype children with late-onset Pompe disease (LOPD) diagnosed via newborn screening (NBS) to provide guidance for long-term follow up. METHODS: Twenty infants ages 6-21 months with LOPD diagnosed by NBS underwent systematic clinical evaluation at Duke University including cardiac imaging, biomarker testing, physical therapy evaluation, and speech-language pathology evaluation. RESULTS: Of the 20 infants, four were homozygous for the "late-onset" IVS1 splice site variant c.-32-13 T > G, fourteen were compound heterozygous, and two did not have any copies of this variant. None of the patients had evidence of cardiomyopathy or cardiac rhythm disturbances. Biomarker testing showed an increase in CK, AST, and ALT in 8 patients (40%) and increase in Glc4 in two patients (10%). All patients demonstrated postural and kinematic concerns. Three patients (17%) scored below the 10%ile on the Alberta Infant Motor Scale (AIMS) and 15 patients (83%) scored above the 10%ile. Speech-language pathology assessments were normal in all patients and mild feeding/swallowing abnormalities were noted in nine patients (45%). CONCLUSION: Our data show high variability among children with LOPD diagnosed via NBS. Careful physical therapy evaluation is necessary to monitor for subtle musculoskeletal signs that may reflect early muscle involvement. Patients should be monitored closely for symptom progression.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II , Enfermedad del Almacenamiento de Glucógeno Tipo II/diagnóstico , Enfermedad del Almacenamiento de Glucógeno Tipo II/genética , Enfermedad del Almacenamiento de Glucógeno Tipo II/patología , Homocigoto , Humanos , Recién Nacido , Mutación , Tamizaje Neonatal/métodos , Fenotipo
3.
Curr Opin Neurol ; 34(5): 686-696, 2021 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-34231549

RESUMEN

PURPOSE OF REVIEW: Hypoventilation syndrome in neuromuscular disorders (NMDs) is primarily due to respiratory muscle weakness and results in increased morbidity and mortality. This article highlights current aspects of neuromuscular hypoventilation syndrome, including pathophysiology, clinical symptoms, assessment, respiratory involvement in various NMD, and causal and symptomatic treatments with an emphasis on recent research and advances. RECENT FINDINGS AND SUMMARY: New therapeutic agents have been developed within the last years, proving a positive effect on respiratory system. Symptomatic therapies, including mechanical ventilation and cough assistance approaches, are important in NMD and respiratory muscle training may have benefit in strengthening respiratory muscles and should be offered patients with respiratory muscle weakness the same way as physiotherapy. Correct respiratory assessments and their correct interpretation are hallmarks for early diagnosis of hypoventilation syndrome and treatment.


Asunto(s)
Hipoventilación , Enfermedades Neuromusculares , Humanos , Hipoventilación/diagnóstico , Hipoventilación/terapia , Debilidad Muscular , Enfermedades Neuromusculares/complicaciones , Enfermedades Neuromusculares/diagnóstico , Enfermedades Neuromusculares/terapia , Respiración Artificial , Músculos Respiratorios
4.
PLoS Pathog ; 15(7): e1007944, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-31306469

RESUMEN

The respiratory syncytial virus (RSV) fusion (F) glycoprotein is a major target of neutralizing antibodies arising from natural infection, and antibodies that specifically bind to the prefusion conformation of RSV F generally demonstrate the greatest neutralization potency. Prefusion-stabilized RSV F variants have been engineered as vaccine antigens, but crystal structures of these variants have revealed conformational differences in a key antigenic site located at the apex of the trimer, referred to as antigenic site Ø. Currently, it is unclear if flexibility in this region is an inherent property of prefusion RSV F or if it is related to inadequate stabilization of site Ø in the engineered variants. Therefore, we set out to investigate the conformational flexibility of antigenic site Ø, as well as the ability of the human immune system to recognize alternative conformations of this site, by determining crystal structures of prefusion RSV F bound to neutralizing human-derived antibodies AM22 and RSD5. Both antibodies bound with high affinity and were specific for the prefusion conformation of RSV F. Crystal structures of the complexes revealed that the antibodies recognized distinct conformations of antigenic site Ø, each diverging at a conserved proline residue located in the middle of an α-helix. These data suggest that antigenic site Ø exists as an ensemble of conformations, with individual antibodies recognizing discrete states. Collectively, these results have implications for the refolding of pneumovirus and paramyxovirus fusion proteins and should inform development of prefusion-stabilized RSV F vaccine candidates.


Asunto(s)
Antígenos Virales/química , Virus Sincitial Respiratorio Humano/inmunología , Proteínas Virales de Fusión/química , Proteínas Virales de Fusión/inmunología , Secuencia de Aminoácidos , Anticuerpos Neutralizantes/inmunología , Anticuerpos Antivirales/inmunología , Complejo Antígeno-Anticuerpo/química , Complejo Antígeno-Anticuerpo/inmunología , Antígenos Virales/genética , Antígenos Virales/inmunología , Sitios de Unión/genética , Cristalografía por Rayos X , Humanos , Modelos Moleculares , Prolina/química , Conformación Proteica , Virus Sincitial Respiratorio Humano/química , Virus Sincitial Respiratorio Humano/genética , Proteínas Virales de Fusión/genética
5.
Mol Genet Metab ; 133(3): 261-268, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-34053870

RESUMEN

Late-onset Pompe disease (LOPD) is an inherited autosomal recessive progressive metabolic myopathy that presents in the first year of life to adulthood. Clinical presentation is heterogeneous, differential diagnosis is challenging, and diagnostic delay is common. One challenge to differential diagnosis is the overlap of clinical features with those encountered in other forms of acquired/hereditary myopathy. Tongue weakness and imaging abnormalities are increasingly recognized in LOPD. In order to explore the diagnostic potential of tongue involvement in LOPD, we assessed tongue structure and function in 70 subjects, including 10 with LOPD naive to treatment, 30 with other acquired/hereditary myopathy, and 30 controls with neuropathy. Tongue strength was assessed with both manual and quantitative muscle testing. Ultrasound (US) was used to assess tongue overall appearance, echointensity, and thickness. Differences in tongue strength, qualitative appearance, echointensity, and thickness between LOPD subjects and neuropathic controls were statistically significant. Greater tongue involvement was observed in LOPD subjects compared to those with other acquired/hereditary myopathies, based on statistically significant decreases in quantitative tongue strength and sonographic muscle thickness. These findings provide additional evidence for tongue involvement in LOPD characterized by weakness and sonographic abnormalities suggestive of fibrofatty replacement and atrophy. Findings of quantitative tongue weakness and/or atrophy may aid differentiation of LOPD from other acquired/hereditary myopathies. Additionally, our experiences in this study reveal US to be an effective, efficient imaging modality to allow quantitative assessment of the lingual musculature at the point of care.


Asunto(s)
Atrofia/fisiopatología , Enfermedad del Almacenamiento de Glucógeno Tipo II/diagnóstico , Enfermedad del Almacenamiento de Glucógeno Tipo II/fisiopatología , Enfermedades de Inicio Tardío/diagnóstico , Enfermedades Musculares/congénito , Enfermedades Musculares/diagnóstico , Lengua/fisiopatología , Adulto , Anciano , Diagnóstico Tardío , Diagnóstico Diferencial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Debilidad Muscular/diagnóstico , Debilidad Muscular/etiología , Lengua/diagnóstico por imagen , Ultrasonografía , Adulto Joven
6.
PLoS Pathog ; 14(3): e1006935, 2018 03.
Artículo en Inglés | MEDLINE | ID: mdl-29509814

RESUMEN

Respiratory syncytial virus (RSV) is a major cause of severe lower respiratory tract infections in infants and the elderly, and yet there remains no effective treatment or vaccine. The surface of the virion is decorated with the fusion glycoprotein (RSV F) and the attachment glycoprotein (RSV G), which binds to CX3CR1 on human airway epithelial cells to mediate viral attachment and subsequent infection. RSV G is a major target of the humoral immune response, and antibodies that target the central conserved region of G have been shown to neutralize both subtypes of RSV and to protect against severe RSV disease in animal models. However, the molecular underpinnings for antibody recognition of this region have remained unknown. Therefore, we isolated two human antibodies directed against the central conserved region of RSV G and demonstrated that they neutralize RSV infection of human bronchial epithelial cell cultures in the absence of complement. Moreover, the antibodies protected cotton rats from severe RSV disease. Both antibodies bound with high affinity to a secreted form of RSV G as well as to a peptide corresponding to the unglycosylated central conserved region. High-resolution crystal structures of each antibody in complex with the G peptide revealed two distinct conformational epitopes that require proper folding of the cystine noose located in the C-terminal part of the central conserved region. Comparison of these structures with the structure of fractalkine (CX3CL1) alone or in complex with a viral homolog of CX3CR1 (US28) suggests that RSV G would bind to CX3CR1 in a mode that is distinct from that of fractalkine. Collectively, these results build on recent studies demonstrating the importance of RSV G in antibody-mediated protection from severe RSV disease, and the structural information presented here should guide the development of new vaccines and antibody-based therapies for RSV.


Asunto(s)
Anticuerpos Neutralizantes/farmacología , Anticuerpos Antivirales/farmacología , Infecciones por Virus Sincitial Respiratorio/prevención & control , Virus Sincitial Respiratorio Humano/inmunología , Proteínas Virales de Fusión/química , Animales , Anticuerpos Neutralizantes/química , Anticuerpos Antivirales/química , Bronquios/efectos de los fármacos , Bronquios/inmunología , Bronquios/metabolismo , Células Cultivadas , Quimiocina CX3CL1/metabolismo , Cristalografía por Rayos X , Células Epiteliales/efectos de los fármacos , Células Epiteliales/inmunología , Células Epiteliales/metabolismo , Epítopos/química , Epítopos/inmunología , Humanos , Masculino , Conformación Proteica , Ratas , Infecciones por Virus Sincitial Respiratorio/inmunología , Infecciones por Virus Sincitial Respiratorio/virología , Vacunas contra Virus Sincitial Respiratorio/farmacología , Sistema Respiratorio/efectos de los fármacos , Sistema Respiratorio/inmunología , Sistema Respiratorio/metabolismo , Sigmodontinae , Proteínas Virales de Fusión/inmunología , Proteínas Virales de Fusión/metabolismo
7.
Genet Med ; 22(5): 898-907, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-31904026

RESUMEN

PURPOSE: Enzyme replacement therapy (ERT) with recombinant human acid-α glucosidase (rhGAA) at standard dose of 20 mg/kg every other week is insufficient to halt the long-term progression of myopathy in Pompe disease. METHODS: We conducted a retrospective study on infantile-onset Pompe disease (IPD) and late-onset Pompe disease (LOPD) patients with onset before age 5 years, ≥12 months of treatment with standard dose ERT, and rhGAA immunogenic tolerance prior to dose escalation. Long-term follow-up of up to 18 years was obtained. We obtained physical therapy, lingual strength, biochemical, and pulmonary assessments as dose was escalated. RESULTS: Eleven patients with IPD (n = 7) or LOPD (n = 4) were treated with higher doses of up to 40 mg/kg weekly. There were improvements in gross motor function measure in 9/10 patients, in lingual strength in 6/6 patients, and in pulmonary function in 4/11. Significant reductions in urinary glucose tetrasaccharide, creatine kinase, aspartate aminotransferase, and alanine aminotransferase were observed at 40 mg/kg weekly compared with lower doses (p < 0.05). No safety or immunogenicity concerns were observed at higher doses. CONCLUSION: Higher rhGAA doses are safe, improve gross motor outcomes, lingual strength, pulmonary function measures, and biochemical markers in early-onset Pompe disease, and should be considered in patients with clinical and functional decline.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II , alfa-Glucosidasas , Niño , Preescolar , Terapia de Reemplazo Enzimático , Enfermedad del Almacenamiento de Glucógeno Tipo II/tratamiento farmacológico , Humanos , Estudios Retrospectivos , alfa-Glucosidasas/uso terapéutico
8.
Mol Genet Metab ; 127(4): 346-354, 2019 08.
Artículo en Español | MEDLINE | ID: mdl-31303277

RESUMEN

INTRODUCTION: Morbidity and mortality in adults with late-onset Pompe disease (LOPD) results primarily from persistent progressive respiratory muscle weakness despite treatment with enzyme replacement therapy (ERT). To address this need, we have developed a 12-week respiratory muscle training (RMT) program that provides calibrated, individualized, and progressive pressure-threshold resistance against inspiration and expiration. Our previous results suggest that our RMT regimen is safe, well-tolerated, and results in large increases in respiratory muscle strength. We now conduct an exploratory double-blind, randomized control trial (RCT) to determine: 1) utility and feasibility of sham-RMT as a control condition, 2) the clinically meaningful outcome measures for inclusion in a future efficacy trial. This manuscript provides comprehensive information regarding the design and methods used in our trial and will aid in the reporting and interpretation of our future findings. METHODS: Twenty-eight adults with LOPD will be randomized (1:1) in blocks of 4 to RMT (treatment) or sham-RMT (control). Assessments will be conducted at pretest, posttest, 3-months detraining, and 6-months detraining. The primary outcome is maximum inspiratory pressure (MIP). Secondary outcomes include maximum expiratory pressure (MEP), 6-min walk test (6MWT), Gait, Stairs, Gowers, and Chair test (GSGC), peak cough flow (PCF), and patient-reported life activity/social participation (Rasch-built Pompe-specific Activity scale [R-Pact]). Exploratory outcomes include quantitative measures from polysomnography; patient reported measures of fatigue, daytime sleepiness, and sleep quality; and ultrasound measures of diaphragm thickness. This research will use a novel tool to provide automated data collection and user feedback, and improve control over dose. ETHICS AND DISSEMINATION: The results of this clinical trial will be promptly analyzed and submitted for publication. Results will also be made available on clinicaltrials.gov. ClinicalTrials.gov: NCT02801539, R21AR069880.


Asunto(s)
Ejercicios Respiratorios , Enfermedad del Almacenamiento de Glucógeno Tipo II/terapia , Método Doble Ciego , Humanos , Calidad de Vida , Ensayos Clínicos Controlados Aleatorios como Asunto , Pruebas de Función Respiratoria , Músculos Respiratorios/fisiología , Adulto Joven
9.
Dysphagia ; 34(6): 904-915, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-30798360

RESUMEN

(1) To examine the association between vocal fold paresis/paralysis (VFP) and poor swallowing outcomes in a thoracic surgery cohort at the population level, and (2) to assess utilization of ENT/speech-language pathology intervention in these cases. The National Inpatient Sample (NIS) represents a 20% stratified sample of discharges from US hospitals. Using ICD-9 codes, discharges undergoing general thoracic surgical procedures between 2008 and 2013 were identified in the NIS. Sub-cohorts of discharges with VFP and those who utilized ENT/SLP services were also identified. Weighted logistic regression models were used to compare binary outcomes such as dysphagia, aspiration pneumonia, and other complications; generalized linear models with generalized estimating equations (GEE) were used to compare total hospital costs and length of stay (LOS). We identified a weighted estimate of 673,940 discharges following general thoracic surgery procedures. The weighted frequency of VFP was 3738 (0.55%). Compared to those without VFP, patients who discharged with VFP had increased odds of dysphagia (6.56, 95% CI 5.07-8.47), aspiration pneumonia (2.54, 95% CI 1.74-3.70), post-operative tracheotomy (3.10, 95% CI 2.16-4.45), and gastrostomy tube requirement (2.46, 95% CI 1.66-3.64). Discharges with VFP also had a longer length of stay and total hospital costs. Of the discharges with VFP, 15.7% received ENT/SLP intervention. VFP after general thoracic procedures is associated with negative swallowing-related health outcomes and higher costs. Despite these negative impacts, most patients with VFP do not receive ENT/SLP intervention, identifying a potential opportunity for improving adverse swallowing-related outcomes.


Asunto(s)
Trastornos de Deglución/diagnóstico , Procedimientos Quirúrgicos Torácicos/efectos adversos , Parálisis de los Pliegues Vocales/diagnóstico , Anciano , Anciano de 80 o más Años , Trastornos de Deglución/etiología , Biomarcadores Ambientales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Medición de Riesgo/métodos , Factores de Riesgo , Parálisis de los Pliegues Vocales/etiología
10.
Am Nat ; 189(3): 227-241, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28221835

RESUMEN

Empirical studies in select systems suggest that social information-the incidental or deliberate information produced by animals and available to other animals-can fundamentally shape animal grouping behavior. However, to understand the role of social information in animal behavior and fitness, we must establish general theory that quantifies effects of social information across ecological contexts and generates expectations that can be applied across systems. Here we used dynamic state variable modeling to isolate effects of social information about food and predators on grouping behavior and fitness. We characterized optimal behavior from a set of strategies that included grouping with different numbers of conspecifics or heterospecifics and the option to forage or be vigilant over the course of a day. We show that the use of social information alone increases grouping behavior but constrains group size to limit competition, ultimately increasing individual fitness substantially across various ecological contexts. We also found that across various contexts, foraging in mixed-species groups is generally better than foraging in conspecific groups, supporting recent theory on competition-information quality trade-offs. Our findings suggest that multiple forms of social information shape animal grouping and fitness, which are sensitive to resource availability and predation pressure that determine information usefulness.


Asunto(s)
Miedo , Aptitud Genética , Conducta Predatoria , Animales , Conducta Animal , Conducta Social
11.
Mol Genet Metab ; 120(3): 163-172, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-28185884

RESUMEN

BACKGROUND: Pompe disease is an autosomal recessive disorder caused by deficiency of the lysosomal glycogen-hydrolyzing enzyme acid α-glucosidase (GAA). The adult-onset form, late-onset Pompe disease (LOPD), has been characterized by glycogen accumulation primarily in skeletal, cardiac, and smooth muscles, causing weakness of the proximal limb girdle and respiratory muscles. However, increased scientific study of LOPD continues to enhance understanding of an evolving phenotype. PURPOSE: To expand our understanding of the evolving phenotype of LOPD since the approval of enzyme replacement therapy (ERT) with alglucosidase alfa (Myozyme™/Lumizyme™) in 2006. METHODS: All articles were included in the review that provided data on the charactertistics of LOPD identified via the PubMed database published since the approval of ERT in 2006. All signs and symptoms of the disease that were reported in the literature were identified and included in the review. RESULTS: We provide a comprehensive review of the evolving phenotype of LOPD. Our findings support and extend the knowledge of the multisystemic nature of the disease. CONCLUSIONS: With the advent of ERT and the concurrent increase in the scientific study of LOPD, the condition once primarily conceptualized as a limb-girdle muscle disease with prominent respiratory involvement is increasingly recognized to be a condition that results in signs and symptoms across body systems and structures.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II/tratamiento farmacológico , Enfermedad del Almacenamiento de Glucógeno Tipo II/patología , Músculos Respiratorios/patología , alfa-Glucosidasas/uso terapéutico , Adulto , Edad de Inicio , Terapia de Reemplazo Enzimático/métodos , Femenino , Humanos , Masculino , Fenotipo , Músculos Respiratorios/efectos de los fármacos , Resultado del Tratamiento , alfa-Glucosidasas/farmacología
12.
Am J Med Genet A ; 173(11): 3058-3066, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28857390

RESUMEN

We systematically reviewed the measures used in pharmaceutical trials in children/adults with Down syndrome without dementia. Our purpose was to identify developmentally appropriate outcome measures capable of detecting changes in cognitive and adaptive functioning in this population. Eleven studies were included and used diverse outcome measures across the domains of language, memory, attention, behavior, and executive/adaptive functioning. Our results highlight the challenges in selecting measures capable of capturing improvements in pharmaceutical trials in individuals with DS. We offer suggestions to enhance future research, including: conducting studies with larger samples of participants with a range of developmental abilities; modifying existing/developing novel outcome measures; incorporating advances from related areas and DS observational studies; and considering alternative analytic techniques to characterize treatment effects.


Asunto(s)
Cognición/efectos de los fármacos , Disfunción Cognitiva/tratamiento farmacológico , Demencia/tratamiento farmacológico , Síndrome de Down/tratamiento farmacológico , Atención/fisiología , Disfunción Cognitiva/genética , Disfunción Cognitiva/fisiopatología , Demencia/genética , Demencia/patología , Síndrome de Down/genética , Síndrome de Down/fisiopatología , Humanos , Memoria/efectos de los fármacos , Memoria/fisiología
13.
Mol Genet Metab ; 117(2): 120-8, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26381077

RESUMEN

BACKGROUND: Determine the effects of a 12-week respiratory muscle training (RMT) program in late-onset Pompe disease (LOPD). METHODS: We investigated the effects of 12-weeks of RMT followed by 3-months detraining using a single-subject A-B-A experimental design replicated across 8 adults with LOPD. To assess maximal volitional respiratory strength, our primary outcomes were maximum inspiratory pressure (MIP) and maximum expiratory pressure (MEP). Effect sizes for changes in MIP and MEP were determined using Cohen's d statistic. Exploratory outcomes targeted motor function, and peak cough flow (PCF) was measured in the last 5 subjects. RESULTS: From pretest to posttest, all 8 subjects exhibited increases in MIP, and 7 of 8 showed increases in MEP. Effect size data reveal the magnitude of increases in MIP to be large in 4 (d≥1.0) and very large in 4 (d≥2.0), and effect sizes for increases in MEP were large in 1 (d≥1.0) and very large in 6 (d≥2.0). Across participants, pretest to posttest MIP and MEP increased by a mean of 19.6% (sd=9.9) and 16.1% (sd=17.3), respectively. Respiratory strength increases, particularly for the inspiratory muscles, were generally durable to 3-months detraining. CONCLUSIONS: These data suggest our 12-week RMT program results in large to very large increases in inspiratory and expiratory muscle strength in adults with LOPD. Additionally, increases in respiratory strength appeared to be relatively durable following 3-months detraining. Although additional research is needed, RMT appears to offer promise as an adjunctive treatment for respiratory weakness in LOPD.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II/terapia , Adulto , Edad de Inicio , Anciano , Ejercicios Respiratorios , Femenino , Enfermedad del Almacenamiento de Glucógeno Tipo II/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Fuerza Muscular , Respiración , Músculos Respiratorios/fisiopatología , Resultado del Tratamiento , Caminata
14.
Int J Mol Sci ; 17(10)2016 Oct 17.
Artículo en Inglés | MEDLINE | ID: mdl-27763517

RESUMEN

Pompe disease is an autosomal-recessive lysosomal storage disorder characterized by progressive myopathy with proximal muscle weakness, respiratory muscle dysfunction, and cardiomyopathy (in infants only). In patients with juvenile or adult disease onset, respiratory muscle weakness may decline more rapidly than overall neurological disability. Sleep-disordered breathing, daytime hypercapnia, and the need for nocturnal ventilation eventually evolve in most patients. Additionally, respiratory muscle weakness leads to decreased cough and impaired airway clearance, increasing the risk of acute respiratory illness. Progressive respiratory muscle weakness is a major cause of morbidity and mortality in late-onset Pompe disease even if enzyme replacement therapy has been established. Practical knowledge of how to detect, monitor and manage respiratory muscle involvement is crucial for optimal patient care. A multidisciplinary approach combining the expertise of neurologists, pulmonologists, and intensive care specialists is needed. Based on the authors' own experience in over 200 patients, this article conveys expert recommendations for the diagnosis and management of respiratory muscle weakness and its sequelae in late-onset Pompe disease.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II/patología , Debilidad Muscular/patología , Debilidad Muscular/terapia , Insuficiencia Respiratoria/terapia , Músculos Respiratorios/patología , Adulto , Enfermedad del Almacenamiento de Glucógeno Tipo II/diagnóstico , Enfermedad del Almacenamiento de Glucógeno Tipo II/terapia , Humanos , Lactante , Pruebas de Función Respiratoria , Encuestas y Cuestionarios
15.
Haematologica ; 100(7): 945-54, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25862704

RESUMEN

RNA splicing plays a fundamental role in human biology. Its relevance in cancer is rapidly emerging as demonstrated by spliceosome mutations that determine the prognosis of patients with hematologic malignancies. We report studies using FD-895 and pladienolide-B in primary leukemia cells derived from patients with chronic lymphocytic leukemia and leukemia-lymphoma cell lines. We found that FD-895 and pladienolide-B induce an early pattern of mRNA intron retention - spliceosome modulation. This process was associated with apoptosis preferentially in cancer cells as compared to normal lymphocytes. The pro-apoptotic activity of these compounds was observed regardless of poor prognostic factors such as Del(17p), TP53 or SF3B1 mutations and was able to overcome the protective effect of culture conditions that resemble the tumor microenvironment. In addition, the activity of these compounds was observed not only in vitro but also in vivo using the A20 lymphoma murine model. Overall, these findings give evidence for the first time that spliceosome modulation is a valid target in chronic lymphocytic leukemia and provide an additional rationale for the development of spliceosome modulators for cancer therapy.


Asunto(s)
Antineoplásicos/farmacología , Compuestos Epoxi/farmacología , Leucemia Linfocítica Crónica de Células B/tratamiento farmacológico , Macrólidos/farmacología , ARN Mensajero/antagonistas & inhibidores , Empalmosomas/efectos de los fármacos , Animales , Antibacterianos/farmacología , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Expresión Génica , Humanos , Leucemia Linfocítica Crónica de Células B/genética , Leucemia Linfocítica Crónica de Células B/metabolismo , Leucemia Linfocítica Crónica de Células B/patología , Ratones , Ratones Endogámicos BALB C , Mutación , Fosfoproteínas/genética , Fosfoproteínas/metabolismo , Empalme del ARN/efectos de los fármacos , Factores de Empalme de ARN , ARN Mensajero/genética , ARN Mensajero/metabolismo , Ribonucleoproteína Nuclear Pequeña U2/genética , Ribonucleoproteína Nuclear Pequeña U2/metabolismo , Análisis de Supervivencia , Proteína p53 Supresora de Tumor/genética , Proteína p53 Supresora de Tumor/metabolismo , Ensayos Antitumor por Modelo de Xenoinjerto
16.
Muscle Nerve ; 51(5): 731-5, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25399907

RESUMEN

INTRODUCTION: Skeletal muscle is common in late-onset Pompe disease (LOPD). Recent data implicate common bulbar muscle involvement (i.e., the tongue). METHODS: We used quantitative assessment of lingual strength to retrospectively determine the frequency and severity of lingual weakness in LOPD. We additionally examined associations between lingual strength and the presence or absence of dysarthria, and dysarthria severity. RESULTS: Quantitative assessment revealed lingual weakness to be present in 80% of the sample. In the 24 affected patients, severity was mild in 29%, moderate in 29%, and severe in 42%. Patients with clinical dysarthria had greater lingual weakness than those without. As dysarthria severity increased, lingual strength decreased by an average of 6.82 kPa. CONCLUSIONS: These quantitative data provide additional evidence for presence of bulbar muscle disease in patients with LOPD. Further study is necessary to determine functional effects, temporal progression, and effects of treatment.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II/fisiopatología , Fuerza Muscular/fisiología , Debilidad Muscular/fisiopatología , Lengua/fisiopatología , Adulto , Edad de Inicio , Anciano , Niño , Disartria/epidemiología , Disartria/fisiopatología , Femenino , Enfermedad del Almacenamiento de Glucógeno Tipo II/diagnóstico , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Índice de Severidad de la Enfermedad
17.
Muscle Nerve ; 51(5): 722-30, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25155446

RESUMEN

INTRODUCTION: Previous examination of whole-body muscle involvement in Pompe disease has been limited to physical examination and/or qualitative magnetic resonance imaging (MRI). In this study we assess the feasibility of quantitative proton-density fat-fraction (PDFF) whole-body MRI in late-onset Pompe disease (LOPD) and compare the results with manual muscle testing. METHODS: Seven LOPD patients and 11 disease-free controls underwent whole-body PDFF MRI. Quantitative MR muscle group assessments were compared with physical testing of muscle groups. RESULTS: The 95% upper limits of confidence intervals for muscle groups were 4.9-12.6% in controls and 6.8-76.4% in LOPD patients. LOPD patients showed severe and consistent tongue and axial muscle group involvement, with less marked involvement of peripheral musculature. MRI was more sensitive than physical examination for detection of abnormality in multiple muscle groups. CONCLUSION: This integrated, quantitative approach to muscle assessment provides more detailed data than physical examination and may have clinical utility for monitoring disease progression and treatment response.


Asunto(s)
Enfermedad del Almacenamiento de Glucógeno Tipo II/patología , Enfermedad del Almacenamiento de Glucógeno Tipo II/fisiopatología , Imagen por Resonancia Magnética/métodos , Debilidad Muscular/fisiopatología , Músculo Esquelético/patología , Imagen de Cuerpo Entero/métodos , Adolescente , Adulto , Anciano , Estudios de Casos y Controles , Femenino , Humanos , Masculino , Persona de Mediana Edad , Fuerza Muscular/fisiología , Músculo Esquelético/fisiopatología , Examen Físico , Proyectos Piloto , Sensibilidad y Especificidad , Índice de Severidad de la Enfermedad
18.
Neuromuscul Disord ; 34: 68-74, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38157654

RESUMEN

Valosin-containing protein (VCP) disease is an autosomal dominant multisystem proteinopathy associated with hereditary inclusion body myopathy, Paget disease of bone, and frontotemporal dementia. Myopathy frequently results in respiratory muscle weakness, leading to early mortality due to respiratory failure. We investigated the effects of a remotely administered inspiratory muscle training program in individuals with VCP disease. Nine adults with VCP mutation-positive familial myopathy without evidence of dementia were recruited for a 40-week remotely administered study. Baseline performance was established during the first 8 weeks, followed by 32 weeks of inspiratory muscle training. The primary outcome was maximum inspiratory pressure (MIP). The secondary and exploratory endpoints included spirometry, grip strength, Inclusion Body Myopathy Functional Rating Scale (IBMFRS), Amyotrophic Lateral Sclerosis Functional Rating Scale (ALSFRS), timed up and go, and six-minute walk test (6MWT). During the treatment phase, MIP increased significantly by a weekly mean of 0.392cm. H2O (p=0.023). In contrast, grip strength and ALSFRS significantly decreased by 0.088 lbs. (p=0.031) and 0.043 points (p=0.004) per week, respectively, as expected from the natural progression of this disease. A remotely administered inspiratory muscle training program is therefore feasible, safe, and well-tolerated in individuals with VCP disease and results in improved inspiratory muscle strength.


Asunto(s)
Esclerosis Amiotrófica Lateral , Demencia Frontotemporal , Enfermedades Musculares , Entrenamiento de Fuerza , Adulto , Humanos , Proteína que Contiene Valosina/genética , Respiración , Mutación , Proteínas de Ciclo Celular/genética
19.
Am J Speech Lang Pathol ; 32(4): 1501-1516, 2023 07 10.
Artículo en Inglés | MEDLINE | ID: mdl-37195639

RESUMEN

PURPOSE: Children with Pompe disease, a rare genetic metabolic myopathy, often have speech impairments. In this study, we provide a comprehensive description of articulation, resonance, and voice in children with Pompe disease. METHOD: Fifteen children with Pompe disease (11 with infantile-onset Pompe disease [IOPD], four with late-onset Pompe disease [LOPD]) ranging from 6 to 18 years of age participated in standard speech assessments. Measures included maximum tongue pressure; nasalance; cepstral peak prominence (CPP); low/high ratio (L/H ratio); diadochokinetic (DDK) rates; percent consonants correct (PCC); and visual analog scale (VAS) ratings of articulation, resonance, voice quality, and overall speech severity. Maximum tongue pressures, nasalance, CPP, L/H ratio, DDK rates, and PCC were compared to normative data from typically developing (TD) children. Correlation analyses and multiple regression models of speech measure predictors were conducted. RESULTS: Children with IOPD had greater speech impairment than those with LOPD. The IOPD group had lower maximum tongue pressures, slower articulation rates, lower PCC scores, higher nasalance, and higher L/H voice ratios than TD children. VAS ratings confirmed the presence of impaired articulatory precision, hypernasality, and dysphonia for most of the children with IOPD, with severity of impairment ratings ranging from mild to severe. The LOPD group had mildly elevated nasalance and L/H ratio values relative to TD children, and auditory-perceptual ratings suggested mild to no speech impairment. CONCLUSIONS: Speech disorders involving articulatory precision, resonance balance, and voice quality are common in children with Pompe disease, especially in those with IOPD. With improvements in the detection and treatment of Pompe disease, clinicians should be aware of the associated speech deficits.


Asunto(s)
Disfonía , Enfermedad del Almacenamiento de Glucógeno Tipo II , Humanos , Niño , Enfermedad del Almacenamiento de Glucógeno Tipo II/complicaciones , Enfermedad del Almacenamiento de Glucógeno Tipo II/diagnóstico , Presión , Lengua , Trastornos del Habla/diagnóstico , Trastornos del Habla/etiología , Disfonía/diagnóstico , Medición de la Producción del Habla , Acústica del Lenguaje
20.
Nutr Clin Pract ; 38(1): 157-166, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-35788985

RESUMEN

BACKGROUND: Preoperative dysphagia screening is rare. The purpose of this study was to assess the prevalence and potential risk factors of preoperative dysphagia risk in adults preparing for surgery. METHODS: The Eating Assessment Tool (EAT-10), Patient-Generated Subjective Global Assessment Short Form (PG-SGA SF), and Sarcopenia Screening Tool (SARC-F) were self-administered in adults preparing for surgery to identify dysphagia, malnutrition, and sarcopenia risk, respectively. Other variables collected include clinical demographics, fall risk, and surgical history associated with increased dysphagia risk. Descriptive summary statistics, univariate analysis, and logistic regression were performed as appropriate. RESULTS: The median age was 69 years and preoperative dysphagia risk was 9.6%. Among 357 patients completing both EAT-10 and PG-SGA SF or SARC-F, 7.3% had preoperative dysphagia and malnutrition risk and 7.2% had preoperative dysphagia and sarcopenia risk. Preoperative dysphagia risk was 2.7 times greater in those with prior surgical history associated with increased risk of dysphagia, 2.2 times higher in women, and almost twice as high in Black patients and patients with fall risk. Logistic regression revealed significant odds ratios (ORs) for prior surgical history associated with increased risk of dysphagia (OR, 2.95; 95% CI, 1.62-5.40) and male sex (OR, 0.52; 95% CI, 0.29-0.94), and a significant relationship between preoperative dysphagia and malnutrition risk (OR, 4.56; 95% CI, 2.02-10.28) when controlling for clinical variables. CONCLUSION: The high prevalence of dysphagia risk alone and in combination with malnutrition and sarcopenia risk in community-dwelling adults underscores the need for standardized preoperative screening and optimization prior to surgery.


Asunto(s)
Trastornos de Deglución , Desnutrición , Sarcopenia , Humanos , Masculino , Femenino , Adulto , Anciano , Trastornos de Deglución/epidemiología , Trastornos de Deglución/etiología , Vida Independiente , Evaluación Nutricional , Sarcopenia/etiología , Sarcopenia/complicaciones , Prevalencia , Desnutrición/diagnóstico , Desnutrición/epidemiología , Desnutrición/etiología , Factores de Riesgo
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