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1.
Med Care ; 62(3): 132-139, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-38036460

RESUMEN

BACKGROUND: Some policymakers are concerned that expanding telehealth coverage may increase Medicare expenditures. However, there is limited evidence on the association of telehealth use with utilization and spending among Medicare beneficiaries with major depression. OBJECTIVE: To examine the differences in spending and utilization among telemental health users and non-telemental health users with major depression. METHODS: We examined 2014-2019 traditional Medicare claims data for beneficiaries aged ≥50 years with major depression in Texas. Multivariable generalized linear models were used to assess the relationships between telemental health use and Medicare spending and utilization while adjusting for patient demographics and programmatic and clinical factors. RESULTS: In each of the years between 2014 and 2019, an average of 4.6% Medicare beneficiaries with major depression had at least 1 telemental health visit. Compared with beneficiaries without a telemental health visit, those who had a telemental health visit were significantly more likely to be enrolled in Medicaid, be Medicare eligible due to a disability, live in a lower income area or in a rural area, and have a higher comorbidity index. Beneficiaries utilizing telemental health services incurred higher unadjusted Medicare spending than those not receiving telemental health services. However, this difference appeared due to beneficiary and programmatic characteristics rather than telemental health use. Adjusting for model covariates, the telemental health group had lower overall per member per year predicted spending, inpatient admissions, and emergency department visits than non-telemental health users. CONCLUSION: Our findings suggest that telemental health care use may improve access to mental health care without increasing Medicare spending among telemental health users in Texas.


Asunto(s)
Trastorno Depresivo Mayor , Telemedicina , Anciano , Humanos , Estados Unidos , Medicare , Gastos en Salud , Depresión
2.
Telemed J E Health ; 2024 Jun 27.
Artículo en Inglés | MEDLINE | ID: mdl-38934133

RESUMEN

Objective: Investigate the association between Telemental Health (TMH) uptake and sociodemographic characteristics, and how TMH uptake relates to health care resource utilization and Medicaid expenditures among Mississippi Medicaid enrollees with major depression. Methods: A retrospective cohort study was conducted (2019-2020), comparing those who utilized TMH and those who did not. Results: Among the 21,239 identified enrollees, 806 (3.79%) utilized TMH. The TMH cohort was more likely to be of older age, non-Hispanic White, comprehensive managed care organization enrollees, rural residents, and from areas with a higher area deprivation index, and have higher Charlson comorbidity index scores. The TMH cohort also exhibited higher mental health-related and all-cause outpatient and emergency department utilization, along with higher Medicaid expenditures. Conclusion: As the first study investigating telehealth utilization among Mississippi Medicaid enrollees, this study highlights sociodemographic disparities in telehealth adoption. Addressing barriers hindering telehealth adoption among vulnerable populations and ensuring the availability of quality data are vital for future research.

3.
Telemed J E Health ; 2024 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-38546441

RESUMEN

Background: Telemental health (TMH) offers a promising approach to managing major depressive disorder (MDD). The objective of our work was to evaluate TMH usage among a vulnerable population of MDD Medicare beneficiaries and its association with health care utilization and expenditures. Methods: This cohort study analyzed 2019 Mississippi Medicare fee-for-service data for adult beneficiaries with MDD. Subjects were matched by the use of TMH following 1:1 propensity score matching. Comparisons between TMH and non-TMH cohorts were made on health care utilization and expenditure outcomes, adjusting for provider types postmatching. Results: Among 7,673 identified beneficiaries, 551 used TMH and 7,122 did not. Prematching, TMH cohort showed greater proportions of dual beneficiaries, rural residents, subjects with income below $40,000, those with disability entitlement, and higher Charlson comorbidity index scores, compared to the non-TMH cohort (all p < 0.001). Moreover, the TMH cohort had fewer outpatient visits, but more inpatient admissions, emergency department (ED) visits, and higher medical, pharmacy, and total expenditures (all p < 0.001). Postmatching, TMH was associated with a 25% reduction in outpatient visits (p < 0.001) and a 20% reduction in pharmacy expenditures (p = 0.01), with no significant effect on inpatient admissions, ED visits, medical expenditures, or total expenditures. Conclusions: These results underscore the potential of TMH in enhancing accessible health care services for vulnerable populations and affordable services for Medicare. Our results provide a robust baseline for future policy discussions concerning TMH. Future studies should consider identifying barriers to TMH use among vulnerable populations and ensuring equitable and high-quality patient care.

4.
Int J Technol Assess Health Care ; 39(1): e25, 2023 Apr 28.
Artículo en Inglés | MEDLINE | ID: mdl-37114456

RESUMEN

BACKGROUND: Remote patient monitoring (RPM) has emerged as a viable and valuable care delivery method to improve chronic disease management. In light of the high prevalence and substantial economic burden of cardiovascular disease (CVD), this systematic review examines the cost and cost-effectiveness of using RPM to manage CVD in the United States. METHODS: We systematically searched databases to identify potentially relevant research. Findings were synthesized for cost and cost-effectiveness by economic study type with consideration of study perspective, intervention, clinical outcome, and time horizon. The methodological quality was assessed using the Joanna Briggs Institute Checklist for Economic Evaluations. RESULTS: Thirteen articles with fourteen studies published between 2011 and 2021 were included in the final review. Studies from the provider perspective with a narrow scope of cost components identified higher costs and similar effectiveness for the RPM group relative to the usual care group. However, studies from payer and healthcare sector perspectives indicate better clinical effectiveness of RPM relative to usual care, with two cost-utility analysis studies suggesting that RPM relative to usual care is a cost-effective tool for CVD management even at the conservative $50,000 per Quality-Adjusted Life-Year threshold. Additionally, all model-based studies revealed that RPM is cost-effective in the long run. CONCLUSIONS: Full economic evaluations identified RPM as a potentially cost-effective tool, particularly for long-term CVD management. In addition to the current literature, rigorous economic analysis with a broader perspective is needed in evaluating the value and economic sustainability of RPM.


Asunto(s)
Enfermedades Cardiovasculares , Humanos , Estados Unidos , Análisis Costo-Beneficio , Enfermedades Cardiovasculares/terapia , Atención a la Salud , Resultado del Tratamiento , Monitoreo Fisiológico
5.
Telemed J E Health ; 29(9): 1421-1425, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-36716266

RESUMEN

During the COVID-19 pandemic and public health emergency, telehealth programs vastly expanded with strong support from various federal and state agencies. However, the uncertainty regarding future reimbursement policies for telehealth services has resulted in concerns about long-term sustainability of innovative health service delivery models beyond the financial support. Given the limited literature on creating telehealth programs with long-term sustainability in consideration, we have developed a framework for gathering appropriate data during various stages of program implementation to evaluate clinical effectiveness and economic sustainability that is applicable across various settings, with additional attention to health equity. Recognizing the difficulty of sustaining telehealth programs solely through a fee-for-service payment model, we encourage all telehealth stakeholders, especially payers and policymakers, to consider cost-effectiveness of telehealth programs and support alternate payment models for ensuring long-term sustainability.


Asunto(s)
COVID-19 , Telemedicina , Humanos , COVID-19/epidemiología , Pandemias , Telemedicina/métodos
6.
Vet Ophthalmol ; 24(2): 169-176, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33400365

RESUMEN

OBJECTIVE: To evaluate the safety and efficacy of unilateral topical application of rocuronium bromide in scops owls. ANIMALS STUDIED: Ten healthy adult scops owls. PROCEDURES: Birds weighting between 82-111 g were enrolled. Complete physical and ophthalmic examinations were performed. Each animal received a single dose of 0.15 mg of rocuronium bromide (30 µL) in a randomly selected eye. Static pupillometric evaluations were performed before and after drug instillation at 0, 30, 60, 90, and 120 minutes, in a room with fixed light intensity. Physical and ophthalmic examinations were carried out to evaluate possible adverse effects. RESULTS: Median pupil (95% CI) size at t0 was 7.10 mm (5.51-7.41) for placebo eyes and 7.22 mm (6.93-7.48) for treated eyes, showing no statistical differences (P > .05). When compared to the placebo eye, significant mydriasis was achieved at t30 [8.18 mm (7.22-9.00)] (P = .014) and lasting until t90 [7.35 mm (6.20-9.52)] (P = .004). Maximal mydriasis was obtained at t60 [8.63 mm (7.72-9.81)] (P = .001). During this period, the treated eye no longer responded to direct light stimulation. Complete mydriasis was observed in 5/10 birds (mean weight 97.4 g). Pupil size at t90 and t120 did not differ from baseline (P > .05) in treated eyes. No adverse effects were seen during the study period. CONCLUSION: Single-dose topical rocuronium bromide (0.15 mg) is a safe and effective medium duration mydriatic agent in scops owls. Further studies are needed to evaluate bilateral topical application and standardize the mydriatic protocol.


Asunto(s)
Midriáticos/farmacología , Rocuronio/farmacología , Estrigiformes , Administración Tópica , Animales , Fondo de Ojo , Midriáticos/efectos adversos , Pupila/efectos de los fármacos , Rocuronio/efectos adversos
7.
Clin Infect Dis ; 71(8): e262-e269, 2020 11 05.
Artículo en Inglés | MEDLINE | ID: mdl-31732729

RESUMEN

BACKGROUND: Mycobacterium leprae was thought to be the exclusive causative agent of leprosy until Mycobacterium lepromatosis was identified in a rare form of leprosy known as diffuse lepromatous leprosy (DLL). METHODS: We isolated M. lepromatosis from a patient with DLL and propagated it in athymic nude mouse footpads. Genomic analysis of this strain (NHDP-385) identified a unique repetitive element, RLPM, on which a specific real-time quantitative polymerase chain reaction assay was developed. The RLPM assay, and a previously developed RLEP quantitative polymerase chain reaction assay for M. leprae, were validated as clinical diagnostic assays according to Clinical Laboratory Improvement Amendments guidelines. We tested DNA from archived histological sections, patient specimens from the United States, Philippines, and Mexico, and US wild armadillos. RESULTS: The limit of detection for the RLEP and RLPM assays is 30 M. leprae per specimen (0.76 bacilli per reaction; coefficient of variation, 0.65%-2.44%) and 122 M. lepromatosis per specimen (3.05 bacilli per reaction; 0.84%-2.9%), respectively. In histological sections (n = 10), 1 lepromatous leprosy (LL), 1 DLL, and 3 Lucio reactions contained M. lepromatosis; 2 LL and 2 Lucio reactions contained M. leprae; and 1 LL reaction contained both species. M. lepromatosis was detected in 3 of 218 US biopsy specimens (1.38%). All Philippines specimens (n = 180) were M. lepromatosis negative and M. leprae positive. Conversely, 15 of 47 Mexican specimens (31.91%) were positive for M. lepromatosis, 19 of 47 (40.43%) were positive for M. leprae, and 2 of 47 (4.26%) contained both organisms. All armadillos were M. lepromatosis negative. CONCLUSIONS: The RLPM and RLEP assays will aid healthcare providers in the clinical diagnosis and surveillance of leprosy.


Asunto(s)
Mycobacterium leprae , Mycobacterium , Animales , Humanos , México , Ratones , Mycobacterium leprae/genética , Patología Molecular
8.
Neuroimage ; 223: 117266, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-32853817

RESUMEN

Fibromyalgia (FM) is a chronic condition characterized by widespread pain of unknown etiology associated with alterations in the central nervous system. Although previous studies demonstrated altered patterns of brain activity during pain processing in patients with FM, alterations in spontaneous brain oscillations, in terms of functional connectivity or microstates, have been barely explored so far. Here we recorded the EEG from 43 patients with FM and 51 healthy controls during open-eyes resting-state. We analyzed the functional connectivity between different brain networks computing the phase lag index after group Independent Component Analysis, and also performed an EEG microstates analysis. Patients with FM showed increased beta band connectivity between different brain networks and alterations in some microstates parameters (specifically lower occurrence and coverage of microstate class C). We speculate that the observed alterations in spontaneous EEG may suggest the dominance of endogenous top-down influences; this could be related to limited processing of novel external events and the deterioration of flexible behavior and cognitive control frequently reported for FM. These findings provide the first evidence of alterations in long-distance phase connectivity and microstate indices at rest, and represent progress towards the understanding of the pathophysiology of fibromyalgia and the identification of novel biomarkers for its diagnosis.


Asunto(s)
Ritmo beta , Encéfalo/fisiopatología , Fibromialgia/fisiopatología , Dolor/fisiopatología , Adulto , Electroencefalografía , Femenino , Fibromialgia/complicaciones , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Persona de Mediana Edad , Vías Nerviosas/fisiopatología , Dolor/complicaciones
9.
BMC Med Genet ; 21(1): 189, 2020 09 29.
Artículo en Inglés | MEDLINE | ID: mdl-32993552

RESUMEN

BACKGROUND: Acroscyphodysplasia has been described as a phenotypic variant of acrodysostosis type 2 and pseudohypoparathyroidism. In acrodysostosis, skeletal features can include brachydactyly, facial hypoplasia, cone-shaped epiphyses, short stature, and advanced bone age. To date, reports on this disorder have focused on phenotypic findings, endocrine changes, and genetic variation. We present a 14-year overview of a patient, from birth to skeletal maturity, with acroscyphodysplasia, noting the significant orthopaedic challenges and the need for a multidisciplinary team, including specialists in genetics, orthopaedics, endocrinology, and otolaryngology, to optimize long-term outcomes. CASE PRESENTATION: The patient presented as a newborn with dysmorphic facial features, including severe midface hypoplasia, malar flattening, nasal stenosis, and feeding difficulties. Radiologic findings were initially subtle, and a skeletal survey performed at age 7 months was initially considered normal. Genetic evaluation revealed a variant in PDE4D and subsequent pseudohypoparathyroidism. The patient presented to the department of orthopaedics, at age 2 years 9 months with a leg length discrepancy, right knee contracture, and severely crouched gait. Radiographs demonstrated cone-shaped epiphyses of the right distal femur and proximal tibia, but no evidence of growth plate changes in the left leg. The child developed early posterior epiphyseal arrest on the right side and required multiple surgical interventions to achieve neutral extension. Her left distal femur developed late posterior physeal arrest and secondary contracture without evidence of schypho deformity, which improved with anterior screw epiphysiodesis. The child required numerous orthopaedic surgical interventions to achieve full knee extension bilaterally. At age 13 years 11 months, she was an independent ambulator with erect posture. The child underwent numerous otolaryngology procedures and will require significant ongoing care. She has moderate intellectual disability. DISCUSSION AND CONCLUSIONS: Key challenges in the management of this case included the subtle changes on initial skeletal survey and the marked asymmetry of her deformity. While cone-shaped epiphyses are a hallmark of acrodysostosis, posterior tethering/growth arrest of the posterior distal femur has not been previously reported. Correction of the secondary knee contracture was essential to improve ambulation. Children with acroscyphodysplasia require a multidisciplinary approach, including radiology, genetics, orthopaedics, otolaryngology, and endocrinology specialties.


Asunto(s)
Disostosis/terapia , Discapacidad Intelectual/terapia , Comunicación Interdisciplinaria , Osteocondrodisplasias/terapia , Grupo de Atención al Paciente , Seudohipoparatiroidismo/terapia , Huesos/anomalías , Huesos/diagnóstico por imagen , Huesos/metabolismo , Subunidad RIalfa de la Proteína Quinasa Dependiente de AMP Cíclico/genética , Fosfodiesterasas de Nucleótidos Cíclicos Tipo 4/genética , Disostosis/diagnóstico , Disostosis/genética , Estudios de Seguimiento , Predisposición Genética a la Enfermedad/genética , Discapacidad Intelectual/diagnóstico , Discapacidad Intelectual/genética , Osteocondrodisplasias/diagnóstico , Osteocondrodisplasias/genética , Seudohipoparatiroidismo/diagnóstico , Seudohipoparatiroidismo/genética , Radiografía/métodos , Factores de Tiempo
10.
Appl Microbiol Biotechnol ; 104(9): 3971-3979, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32157423

RESUMEN

The persistence of new leprosy cases in endemic areas such as India, Brazil, Bangladesh, and the Philippines has encouraged studies of chemoprophylaxis among contacts of patients. Epidemiological screening tools to enable early detection of infected individuals in endemic populations would be critical to target individuals most in need of intervention. Despite decades of attempts, however, there still are no tests available for the early detection of low-level infection with Mycobacterium leprae. In this report, we describe the development of a leprosy skin test using M. leprae-specific antigens. We selected the chimeric LID-1 fusion protein, formulated to achieve maximum performance at a minimal dose, as a skin test candidate based on its ability to elicit delayed-type hypersensitivity (DTH) reactions in M. leprae immune guinea pigs in a sensitive and specific manner, i.e., with no cross-reactivity observed with other mycobacterial species. Importantly, evaluations in armadillos indicated that intradermal inoculation of formulated LID-1 could distinguish uninfected from M. leprae-infected animals manifesting with symptoms distinctly similar to the PB presentation of patients. Together, our data provide strong proof-of-concept for developing an antigen-specific skin test to detect low-level M. leprae infection. Such a test could, when applied with appropriate use of chemo- and/or immunoprophylaxis, be instrumental in altering the evolution of clinical disease and M. leprae transmission, thus furthering the objective of zero leprosy.


Asunto(s)
Antígenos Bacterianos/inmunología , Proteínas Bacterianas/inmunología , Hipersensibilidad Tardía , Lepra Paucibacilar/diagnóstico , Pruebas Cutáneas/métodos , Animales , Antígenos Bacterianos/farmacología , Armadillos , Proteínas Bacterianas/farmacología , Diagnóstico Precoz , Femenino , Cobayas , Inyecciones Intradérmicas , Lepra Paucibacilar/inmunología , Mycobacterium leprae , Prueba de Estudio Conceptual , Piel/efectos de los fármacos
11.
Vet Ophthalmol ; 23(4): 730-739, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32519781

RESUMEN

OBJECTIVE: To evaluate the effect of topical cyclopentolate hydrochloride (CH) on quantitative pupillometric readings (PR), tear production (TP), and intraocular pressure (IOP) in healthy horses. ANIMALS STUDIED: Fourteen client-owned horses. PROCEDURES: In a two-phase design study, each animal received 1% CH ophthalmic solution in the left eye [treated] and 0.9% NaCl in the right eye [control] (0.2 mL each). In the first phase (n = 7), TP, IOP, and PR assessment was performed by Schirmer tear test I, rebound tonometry and static pupillometry, at 1, 8, 24, 48, 72, 96, 120, 148, 172, and 196-hours post-instillation. In the second phase (n = 7), plateau mydriasis was evaluated by assessing PR hourly for 8 hours post-instillation. For PR assessment, pupil area (PA), vertical diameter (VPD), and horizontal diameter (HPD) were recorded. All pupillometries were obtained in a room with fixed light intensity (45-60 lux). Statistical analysis was performed by generalized estimating equations method for the effect on parameters over time. RESULTS: After topical CH, significant differences in pupil dilation were seen from 1 to 172 hours for VPD and from 8 to 24 hours for PA, without significant differences on HPD over time. In the second phase, plateau PA and VPD were reached at 3 hours, while plateau HPD at 2 hours. No significant effects were detected on TP and IOP in both eyes at any time, nor on PR of the nontreated eyes. CONCLUSIONS: Topical 1% cyclopentolate hydrochloride could be considered an effective and safe option when a mydriatic/cycloplegic drug is needed in horses.


Asunto(s)
Ciclopentolato/farmacología , Midriáticos/farmacología , Soluciones Oftálmicas/farmacología , Lágrimas/efectos de los fármacos , Animales , Ciclopentolato/administración & dosificación , Femenino , Caballos , Presión Intraocular/efectos de los fármacos , Masculino , Midriáticos/administración & dosificación , Soluciones Oftálmicas/administración & dosificación , Valores de Referencia , Tonometría Ocular/veterinaria
12.
Vet Ophthalmol ; 21(6): 556-564, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-29266715

RESUMEN

OBJECTIVE: To evaluate microbiological, histological, and ultrastructural characteristics of short-term cryopreserved (STC) canine corneoscleral tissue (<1 year) and to compare it with long-term cryopreserved (LTC) tissue (>6 years). ANIMALS STUDIED: Thirty-six healthy canine globes. PROCEDURE: After a decontamination protocol, globes were enucleated and stored at -20 °C. Corneoscleral tissue was evaluated at different periods: <1 year (20 eyes) and >6 years (12 eyes). Four eyes were used as controls. Microbiologic study included direct (blood, McConkey and Sabouraud agars) and enrichment (brain-heart infusion broth) cultures. Cryopreservation artifacts were evaluated by hematoxylin-eosin. Corneoscleral collagen organization and number of normal and dead keratocytes were established by transmission electron microscopy (TEM). Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) was also used for keratocyte characterization. RESULTS: Corneal microbial growth was observed in 25% of the direct STC cultures, and in 47.4% and 16.7% of the enriched STC and LTC cultures, respectively. Scleral STC direct cultures were 30% positive, while enrichment cultures were positive in 66.7% and 16.7% of the STC and LTC, respectively (P = 0.011). Cryopreservation artifacts were higher in LTC tissues (P < 0.001). Apoptotic keratocytes were predominant by TEM and TUNEL, in both STC and LTC. Minimal structural differences were detected in collagen organization between STC and LTC. CONCLUSIONS: Cryopreservation of canine corneoscleral tissue seems to reduce bacterial contamination over time. Apoptosis is the main way of death of cryopreserved canine keratocytes. Based on the lack of significant structural differences between STC and LTC samples, these cryopreserved tissues could potentially be used for tectonic support for at least 8 years without structural or microbiological impediment.


Asunto(s)
Córnea/anatomía & histología , Criopreservación/veterinaria , Esclerótica/anatomía & histología , Animales , Córnea/microbiología , Córnea/ultraestructura , Criopreservación/métodos , Perros , Etiquetado Corte-Fin in Situ/veterinaria , Microscopía Electrónica de Transmisión/veterinaria , Esclerótica/microbiología , Esclerótica/ultraestructura , Factores de Tiempo
13.
Brain Topogr ; 30(4): 539-547, 2017 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-28397030

RESUMEN

Fibromyalgia (FM) is a chronic syndrome involving widespread pain of unclear pathophysiology. FM patients frequently complain about cognitive symptoms that interfere with their daily life activities. Several studies have reported attentional deficits and working memory impairment in FM patients. Nevertheless, the mechanisms involved in these alterations are still poorly understood. In this study we recorded electroencephalographic activity in 32 women with FM and 30 matched controls while they performed a 2-back working memory task. We analyzed behavioural data, posterior alpha and midfrontal theta frequency power, and theta phase synchronization between midfrontal locations and the remaining scalp-recorded areas. Task performance was similar in patients and controls; however, time-frequency analysis showed a smaller decrease in the amplitude of the posterior alpha (related to attentional processing) and a smaller increase in midfrontal theta power (related to mental effort) in FM patients than in healthy controls. The FM patients also showed lower functional connectivity between midfrontal locations and rest of the scalp-recorded areas in the theta band (related to information transfer across distant brain regions when top-down control is required). To our knowledge, this is the first study relating alterations in oscillatory activity and impaired connectivity to attentional working memory complaints in FM patients. Reduced power in the theta band during performance of the task suggests that the medial frontal cortex may play an important role in the attentional deficits reported in FM.


Asunto(s)
Atención/fisiología , Encéfalo/fisiopatología , Fibromialgia/fisiopatología , Memoria a Corto Plazo/fisiología , Adulto , Encéfalo/fisiología , Estudios de Casos y Controles , Electroencefalografía , Femenino , Fibromialgia/psicología , Humanos , Persona de Mediana Edad
14.
Cogn Affect Behav Neurosci ; 16(5): 825-35, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27160368

RESUMEN

It has been suggested that mental rehearsal activates brain areas similar to those activated by real performance. Although inhibition is a key function of human behavior, there are no previous reports of brain activity during imagined response cancellation. We analyzed event-related potentials (ERPs) and time-frequency data associated with motor execution and inhibition during real and imagined performance of a stop-signal task. The ERPs characteristic of stop trials-that is, the stop-N2 and stop-P3-were also observed during covert performance of the task. Imagined stop (IS) trials yielded smaller stop-N2 amplitudes than did successful stop (SS) and unsuccessful stop (US) trials, but midfrontal theta power similar to that in SS trials. The stop-P3 amplitude for IS was intermediate between those observed for SS and US. The results may be explained by the absence of error-processing and correction processes during imagined performance. For go trials, real execution was associated with higher mu and beta desynchronization over motor areas, which confirms previous reports of lower motor activation during imagined execution and also with larger P3b amplitudes, probably indicating increased top-down attention to the real task. The similar patterns of activity observed for imagined and real performance suggest that imagination tasks may be useful for training inhibitory processes. Nevertheless, brain activation was generally weaker during mental rehearsal, probably as a result of the reduced engagement of top-down mechanisms and limited error processing.


Asunto(s)
Encéfalo/fisiología , Imaginación/fisiología , Inhibición Psicológica , Actividad Motora/fisiología , Adulto , Análisis de Varianza , Electroencefalografía , Electromiografía , Potenciales Evocados , Femenino , Mano/fisiología , Humanos , Masculino , Músculo Esquelético/fisiología , Pruebas Neuropsicológicas , Análisis de Componente Principal , Tiempo de Reacción , Procesamiento de Señales Asistido por Computador , Adulto Joven
15.
Clin Exp Rheumatol ; 34(2 Suppl 96): S14-25, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-26812139

RESUMEN

OBJECTIVES: To assess the discriminative power of several symptoms and domains that may assist in the diagnosis of subjects with Fibromyalgia (FM). METHODS: 79 individuals with FM and 66 healthy controls participated in the study. The potential domains proposed by the American College of Rheumatology (ACR) criteria were considered (Wolfe et al., 1990). Binary logistic regression and area under a ROC curve (AUC) were used to rank the importance of the variables in distinguishing patients from pain-free controls. Z values were then calculated to compare the AUC values obtained for each variable with that which yielded the highest AUC (reference standard). For each measure, the cut-offs that maximise sensitivity and specificity were also calculated. RESULTS: The mean pressure pain threshold (PPT) yielded the highest discriminative power (AUC, 0.991) and was therefore chosen as the reference standard; considering an optimal cut- off ≤3.97, it correctly classified 95% of patients and 97% of controls. The discriminative powers of tender point count (cut-off ≥9), health-related quality of life (cut-off ≤63.27) and vitality (cut-off ≤46.97) were as good as that of the reference standard. Finally, items related to physical role and function, body pain, fatigue and memory loss showed adequate discriminative power, although slightly lower than that of the reference. CONCLUSIONS: In addition to pain, health-related quality of life and fatigue/vitality were confirmed as the best predictors of individuals with FM. The study findings indicate that tender point count and especially pressure pain threshold (measured with an algometer) continue to be key issues in the clinical assessment of subjects with FM relative to pain-free controls.


Asunto(s)
Fatiga , Fibromialgia , Umbral del Dolor , Calidad de Vida , Adulto , Área Bajo la Curva , Precisión de la Medición Dimensional , Fatiga/diagnóstico , Fatiga/etiología , Femenino , Fibromialgia/diagnóstico , Fibromialgia/epidemiología , Fibromialgia/fisiopatología , Fibromialgia/psicología , Humanos , Masculino , Persona de Mediana Edad , Dimensión del Dolor/métodos , Umbral del Dolor/fisiología , Umbral del Dolor/psicología , Índice de Severidad de la Enfermedad , España/epidemiología , Evaluación de Síntomas/métodos , Evaluación de Síntomas/normas
16.
Am J Respir Cell Mol Biol ; 52(5): 535-42, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25412193

RESUMEN

Hyperplasia/hypertrophy of submucosal glands contributes to mucus overproduction in chronic diseases of the upper and lower respiratory tracts, especially in adult and pediatric chronic rhinosinusitis. Mechanisms that lead to glandular hyperplasia/hypertrophy are markedly understudied, reflecting a lack of in vitro model systems wherein airway epithelial progenitor cells differentiate into glandular cells. In this study, we developed and compared several in vitro three-dimensional systems using human nasal epithelial basal cells (HNEBCs) cultured by different methods on two types of extracellular matrices. We demonstrate that HNEBCs cultured on Matrigel (Corning, Tewksbury, MA) form glandular acini-like structures, whereas HNEBCs embedded in a collagen type I matrix form a network of tubules. Fibroblast-conditioned medium increases tubule formation in collagen type I. In contrast, HNEBCs cocultured with fibroblasts self-aggregate into organotypic structures with tubules and acini. These observations provide morphological evidence that HNEBCs are pluripotent and retain the capacity to differentiate into structures resembling specific structural components of submucosal glands depending on the extracellular matrices and culture conditions. The resultant models should prove useful in targeting cross-talk between epithelial cells and fibroblasts to decipher molecular mechanisms and specific signals responsible for the development of glandular hyperplasia/hypertrophy, which in turn may lead to new therapeutic strategies for chronic rhinosinusitis and other inflammatory respiratory diseases characterized by glandular hyperplasia/hypertrophy.


Asunto(s)
Células Epiteliales/fisiología , Glándulas Exocrinas/fisiología , Mucosa Nasal/fisiología , Células Madre Pluripotentes/fisiología , Ingeniería de Tejidos/métodos , Diferenciación Celular , Células Cultivadas , Técnicas de Cocultivo , Colágeno/metabolismo , Colágeno Tipo I/metabolismo , Medios de Cultivo Condicionados/metabolismo , Combinación de Medicamentos , Células Epiteliales/metabolismo , Glándulas Exocrinas/citología , Glándulas Exocrinas/metabolismo , Matriz Extracelular/metabolismo , Fibroblastos/metabolismo , Geles , Humanos , Laminina/metabolismo , Mucosa Nasal/citología , Mucosa Nasal/metabolismo , Organogénesis , Comunicación Paracrina , Células Madre Pluripotentes/metabolismo , Proteoglicanos/metabolismo , Nicho de Células Madre
17.
Emerg Infect Dis ; 21(12): 2127-34, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26583204

RESUMEN

Nine-banded armadillos (Dasypus novemcinctus) are naturally infected with Mycobacterium leprae and have been implicated in zoonotic transmission of leprosy. Early studies found this disease mainly in Texas and Louisiana, but armadillos in the southeastern United States appeared to be free of infection. We screened 645 armadillos from 8 locations in the southeastern United States not known to harbor enzootic leprosy for M. leprae DNA and antibodies. We found M. leprae-infected armadillos at each location, and 106 (16.4%) animals had serologic/PCR evidence of infection. Using single-nucleotide polymorphism variable number tandem repeat genotyping/genome sequencing, we detected M. leprae genotype 3I-2-v1 among 35 armadillos. Seven armadillos harbored a newly identified genotype (3I-2-v15). In comparison, 52 human patients from the same region were infected with 31 M. leprae types. However, 42.3% (22/52) of patients were infected with 1 of the 2 M. leprae genotype strains associated with armadillos. The geographic range and complexity of zoonotic leprosy is expanding.


Asunto(s)
Mycobacterium leprae/patogenicidad , Zoonosis/epidemiología , Animales , Armadillos , Reservorios de Enfermedades/microbiología , Humanos , Lepra/microbiología , Lepra/transmisión , Louisiana/epidemiología , Mycobacterium leprae/genética , Texas/epidemiología
18.
Pediatr Res ; 77(2): 356-62, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25420179

RESUMEN

BACKGROUND: Chronic rhinosinusitis (CRS) is characterized by mucous overproduction and submucosal gland hyperplasia. The global protein profile of sinonasal secretions in pediatric CRS has not been studied. We hypothesized that MUC5B, a glandular mucin, would be relatively increased in CRS secretions compared to other mucins. METHODS: Secretions were collected at Children's National Health System (Children's National) from CRS patients undergoing sinus surgery and from control patients without CRS undergoing craniofacial procedures. Proteins were extracted, digested to peptides, and analyzed by mass spectometry. Fold change significance was calculated using the QSpec algorithm. Western blot analysis was performed to validate proteomic findings. RESULTS: In total, 294 proteins were identified. Although both MUC5B and MUC5AC were identified in a majority of samples, the relative abundance of MUC5B was found to be significantly higher (P < 0.05). Western blot data validated these findings. Other proteins with the highest significant positive-fold change in CRS samples were BP1 fold-containing family A member 1, chitinase-3-like protein 1, plastin-2, serpin 10, and BP1 fold-containing family B member 1. CONCLUSION: Overall, our data demonstrate an increase of MUC5B abundance in the sinus secretions of pediatric patients with CRS.


Asunto(s)
Mucina 5B/metabolismo , Membrana Mucosa/metabolismo , Senos Paranasales/metabolismo , Rinitis/metabolismo , Sinusitis/metabolismo , Adolescente , Western Blotting , Niño , Preescolar , Electroforesis en Gel de Poliacrilamida , Ontología de Genes , Humanos , Proteómica
19.
Pain Pract ; 15(4): 323-32, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24690160

RESUMEN

OBJECTIVES: Fibromyalgia (FM) has been associated with a higher prevalence of suicidal behavior. Nevertheless, much remains unknown about suicide risk factors for this chronic pain disorder. In the present study, the relationship of suicidal ideation in FM with a number of sociodemographic, clinical, and psychological variables was analyzed. METHODS: One hundred seventeen women with Fibromyalgia were assessed. The procedure included the exploration of sleep problems (Pittsburgh Sleep Quality Index), depression (Beck Depression Inventory [BDI]), health-related quality of life (SF-36 and Fibromyalgia Impact Questionnaire), the core symptoms of FM (visual analogue scales), and algometry of tender points. Suicidal ideation was evaluated by item 9 of the BDI. Patients with presence vs. absence of suicidal ideation were compared in all the variables studied. RESULTS: The prevalence of suicidal ideation among FM patients was 32.5%. Significant differences between patients with vs. without suicidal ideas emerged mainly for the various indices of depression. Patients with suicidal ideation also reported higher levels of anxiety, more day dysfunction due to sleepiness and more limitations due to emotional and physical problems. Logistic regression analysis revealed that cognitive depression symptoms such as BDI Self-Blame cluster are the more closely related to suicide ideation. CONCLUSIONS: The presence of suicidal ideation in FM patients is closely related to comorbid depression, anxiety and to a higher impact of the disease in daily life.


Asunto(s)
Dolor Crónico/epidemiología , Dolor Crónico/psicología , Fibromialgia/epidemiología , Fibromialgia/psicología , Ideación Suicida , Adulto , Anciano , Anciano de 80 o más Años , Dolor Crónico/diagnóstico , Comorbilidad , Femenino , Fibromialgia/diagnóstico , Humanos , Persona de Mediana Edad , Dimensión del Dolor/psicología , Valor Predictivo de las Pruebas , Escalas de Valoración Psiquiátrica , Calidad de Vida/psicología , Factores de Riesgo , Suicidio/psicología , Encuestas y Cuestionarios , Adulto Joven
20.
Cogn Affect Behav Neurosci ; 14(3): 939-50, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-24481851

RESUMEN

Although there is evidence for preferential perceptual processing of written emotional information, the effects of attentional manipulations and the time course of affective processing require further clarification. In this study, we attempted to investigate how the emotional content of words modulates cerebral functioning (event-related potentials, ERPs) and behavior (reaction times, RTs) when the content is task-irrelevant (emotional Stroop Task, EST) or task-relevant (emotional categorization task, ECT), in a sample of healthy middle-aged women. In the EST, the RTs were longer for emotional words than for neutral words, and in the ECT, they were longer for neutral and negative words than for positive words. A principal components analysis of the ERPs identified various temporospatial factors that were differentially modified by emotional content. P2 was the first emotion-sensitive component, with enhanced factor scores for negative nouns across tasks. The N2 and late positive complex had enhanced factor scores for emotional relative to neutral information only in the ECT. The results reinforce the idea that written emotional information has a preferential processing route, both when it is task-irrelevant (producing behavioral interference) and when it is task-relevant (facilitating the categorization). After early automatic processing of the emotional content, late ERPs become more emotionally modulated as the level of attention to the valence increases.


Asunto(s)
Atención/fisiología , Encéfalo/fisiología , Cognición/fisiología , Emociones/fisiología , Potenciales Evocados/fisiología , Vocabulario , Adulto , Anciano , Mapeo Encefálico , Electroencefalografía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estimulación Luminosa , Análisis de Componente Principal , Tiempo de Reacción/fisiología
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