Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 31
Filtrar
Más filtros

Tipo del documento
Intervalo de año de publicación
1.
J Nerv Ment Dis ; 208(3): 238-244, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-31904669

RESUMEN

Latinos in the United States are less likely to take antidepressants than non-Latino whites, and more likely to prefer depression treatment in primary care. This preliminary study comprised focus groups (2) with primary care providers (12) serving uninsured immigrant Latinos regarding their experiences prescribing and counseling patients about antidepressants. Barriers and challenges included health literacy, language barriers, and illiteracy; perceived stigma; patients' concerns about addiction, polypharmacy, and adverse effects; time constraints of office visits; and difficulty discussing comorbid posttraumatic stress disorder. Messages providers try to share with patients included allowing time for medications to work, taking medications daily as prescribed, mechanisms of action, weighing risks versus benefits, and flexible options for treatment. Providers' recommendations for improving this process included better low-literacy, culturally appropriate written materials with pictures or videos discussing depression. More research is needed to understand patients' and providers' needs in optimizing counseling about antidepressants, particularly regarding underserved and at-risk US populations.


Asunto(s)
Antidepresivos/uso terapéutico , Actitud del Personal de Salud , Emigrantes e Inmigrantes/psicología , Hispánicos o Latinos/psicología , Médicos de Atención Primaria/psicología , Femenino , Grupos Focales , Alfabetización en Salud , Humanos , Dominio Limitado del Inglés , Masculino , Persona de Mediana Edad , Aceptación de la Atención de Salud/etnología , Aceptación de la Atención de Salud/psicología , Estigma Social
2.
Cultur Divers Ethnic Minor Psychol ; 25(4): 579-589, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30816751

RESUMEN

OBJECTIVES: Uninsured immigrants to the United States are psychologically vulnerable due to limited access to mental health services. Latina/o immigrants from Central and South America are further at risk due to high levels of trauma exposure, both in their country of origin and their adopted country. Effective behavioral interventions in primary care are needed to address this services gap for common trauma-related mental disorders, including depression and posttraumatic stress disorder (PTSD). A naturalistic prospective study compared depression and PTSD outcomes for uninsured primary care patients, mostly Latina/o immigrants, in clinics with distinct models for integrating behavioral health services. One clinic had a collaborative care program, that is, a multicomponent, system-level intervention with the goals of facilitating increased screening, improving diagnostic accuracy, increasing uptake of evidence-based treatment, and utilizing measurement-based treatment to target. The other had colocated services, with an on-site therapist. METHOD: One hundred thirty-eight patients with presumptive depression were interviewed at baseline. Follow-up data were collected 8 months later. Care received between the two assessments was ascertained by chart review. RESULTS: There was a significant decrease in depression symptoms regardless of clinic. Factors associated with improved depression outcomes included absence of comorbid PTSD and lack of additional trauma exposures. Although there was overall improvement in PTSD, there was significantly more improvement in the collaborative care clinic. CONCLUSIONS: Results suggest that both models were effective for depression and PTSD; however, the collaborative care model had added benefits for those patients with PTSD. (PsycINFO Database Record (c) 2019 APA, all rights reserved).


Asunto(s)
Depresión/terapia , Emigrantes e Inmigrantes/psicología , Hispánicos o Latinos/psicología , Pacientes no Asegurados/etnología , Trastornos por Estrés Postraumático/terapia , Adulto , Depresión/etnología , Depresión/psicología , Femenino , Humanos , Masculino , Servicios de Salud Mental , Persona de Mediana Edad , Pobreza , Atención Primaria de Salud , Estudios Prospectivos , Trastornos por Estrés Postraumático/etnología , Trastornos por Estrés Postraumático/psicología , Estados Unidos
3.
J Nerv Ment Dis ; 205(12): 952-959, 2017 12.
Artículo en Inglés | MEDLINE | ID: mdl-29076955

RESUMEN

US Latinos are less likely to utilize mental health services than non-Latino whites and to take antidepressant medications. This mixed-method study followed a subset (N = 28) of a research sample of depressed Latino immigrant primary care patients, who took depression medication, with a telephone interview to study their knowledge about and experiences with antidepressant medications. Most (82%) reported taking medication for 2 months or more, and 75% reported feeling better, whereas more than half reported side effects. Most (61%) agreed that antidepressants are generally safe and helpful in treating depression (68%); however, many believed they could be addictive (39%). Fifty percent of patients who discontinued their medication did not inform their providers. Twelve of the 28 patients also participated in focus groups about interactions with providers and made suggestions for conveying information about antidepressants. Patients suggested videos as a format to disseminate medication information because they do not require written comprehension. Other patient recommendations are presented.


Asunto(s)
Antidepresivos/uso terapéutico , Trastorno Depresivo/tratamiento farmacológico , Emigrantes e Inmigrantes/psicología , Conocimientos, Actitudes y Práctica en Salud/etnología , Hispánicos o Latinos/psicología , Prioridad del Paciente/psicología , Adulto , Cuidados Posteriores , Femenino , Humanos , Masculino , Persona de Mediana Edad , Atención Primaria de Salud
4.
Cytometry A ; 85(1): 78-87, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24038859

RESUMEN

Epigenetic regulation of genes involved in cell growth, survival, or differentiation through histone modifications is an important determinant of cancer development and outcome. The basic science of epigenetics uses analytical tools that, although powerful, are not well suited to the analysis of heterogeneous cell populations found in human cancers, or for monitoring the effects of drugs designed to modulate epigenetic mechanisms in patients. To address this, we selected three clinically relevant histone marks (H3K27me3, H3K9ac, and H3K9me2), modulated their expression levels by in vitro treatments to generate high and low expressing control cells, and tested the relative sensitivity of candidate antibodies to detect the differences in expression levels by flow cytoametry using a range of sample preparation techniques. We identified monoclonal antibodies to all three histone marks that were suitable for flow cytoametry. Staining intensities were reduced with increasing formaldehyde concentration, and were not affected by ionic strength or by alcohol treatment. A protocol suitable for clinical samples was then developed, to allow combined labeling of histone marks and surface antigens while preserving light scatter signals. This was applied to normal donor blood, and to samples obtained from 25 patients with leukemia (predominantly acute myeloid leukemia). Significant cellular heterogeneity in H3K9ac and H3K27me3 staining was seen in normal peripheral blood, but the patterns were very similar between individual donors. In contrast, H3K27me3 in particular showed considerable inter-patient heterogeneity in the leukemia cell populations. Although further refinements are likely needed to fully optimize sample staining protocols, "flow epigenetics" appears to be technically feasible, and to have potential both in basic research, and in clinical application.


Asunto(s)
Diferenciación Celular/genética , Epigénesis Genética/genética , Citometría de Flujo/métodos , Leucemia/genética , Proliferación Celular , Metilación de ADN/genética , Histonas/genética , Humanos , Histona Demetilasas con Dominio de Jumonji/genética , Leucemia/sangre , Leucemia/tratamiento farmacológico , Leucemia/patología
5.
Health Place ; 88: 103251, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38744054

RESUMEN

Food banks and food pantries are crucial in supporting access to food and addressing food insecurity for millions of people. This scoping review identified eighteen articles that applied spatial analysis approaches to measure access to food banks and food pantries. The review summarizes the methods and primary findings of these studies, and examines how these address different dimensions of food access. Findings suggest that the majority of studies measured the accessibility and availability dimensions of food access, and two addressed accommodation. Through a discussion of these studies' methods and broader literature on food environments, we highlight opportunities to integrate advanced geospatial and mixed methods to support an empirically grounded and broader understanding of food bank and pantry access in future research. This will yield a more holistic picture of food environments and provide practical implications for site selection, resource allocation, and food assistance operations.


Asunto(s)
Asistencia Alimentaria , Inseguridad Alimentaria , Abastecimiento de Alimentos , Análisis Espacial , Humanos
6.
J Biol Chem ; 287(24): 20088-99, 2012 Jun 08.
Artículo en Inglés | MEDLINE | ID: mdl-22511782

RESUMEN

The importance of AMP-activated protein kinase (AMPK) and protein kinase C (PKC) as effectors of metformin (Met) action on glucose uptake (GU) in skeletal muscle cells was investigated. GU in L6 myotubes was stimulated 2-fold following 16 h of Met treatment and acutely enhanced by insulin in an additive fashion. Insulin-stimulated GU was sensitive to PI3K inhibition, whereas that induced by Met was not. Met and its related biguanide, phenformin, stimulated AMPK activation/phosphorylation to a level comparable with that induced by the AMPK activator, 5-amino-1-ß-d-ribofuranosyl-imidazole-4-carboxamide (AICAR). However, the increase in GU elicited by AICAR was significantly lower than that induced by either biguanide. Expression of a constitutively active AMPK mimicked the effects of AICAR on GU, whereas a dominant interfering AMPK or shRNA silencing of AMPK prevented AICAR-stimulated GU and Met-induced AMPK signaling but only repressed biguanide-stimulated GU by ∼20%. Consistent with this, analysis of GU in muscle cells from α1(-/-)/α2(-/-) AMPK-deficient mice revealed a significant retention of Met-stimulated GU, being reduced by ∼35% compared with that of wild type cells. Atypical PKCs (aPKCs) have been implicated in Met-stimulated GU, and in line with this, Met and phenformin induced activation/phosphorylation of aPKC in L6 myotubes. However, although cellular depletion of aPKC (>90%) led to loss in biguanide-induced aPKC phosphorylation, it had no effect on Met-stimulated GU, whereas inhibitors targeting novel/conventional PKCs caused a significant reduction in biguanide-induced GU. Our findings indicate that although Met activates AMPK, a significant component of Met-stimulated GU in muscle cells is mediated via an AMPK-independent mechanism that involves novel/conventional PKCs.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Glucosa/metabolismo , Hipoglucemiantes/farmacología , Metformina/farmacología , Fibras Musculares Esqueléticas/enzimología , Proteína Quinasa C/metabolismo , Transducción de Señal/efectos de los fármacos , Proteínas Quinasas Activadas por AMP/genética , Aminoimidazol Carboxamida/análogos & derivados , Aminoimidazol Carboxamida/farmacología , Animales , Células Cultivadas , Activación Enzimática/efectos de los fármacos , Activadores de Enzimas/farmacología , Glucosa/genética , Ratones , Ratones Noqueados , Fibras Musculares Esqueléticas/citología , Fenformina/farmacología , Fosfatidilinositol 3-Quinasas/genética , Fosfatidilinositol 3-Quinasas/metabolismo , Inhibidores de las Quinasa Fosfoinosítidos-3 , Fosforilación/efectos de los fármacos , Fosforilación/genética , Proteína Quinasa C/genética , Ribonucleótidos/farmacología , Factores de Tiempo
7.
Agric Human Values ; 40(2): 619-634, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36340279

RESUMEN

Food pantries play a growing role in supporting households facing or at risk of food insecurity in the United States. They also support emergency response and recovery following disasters and extreme weather events. Although food pantries are often placed in close proximity to communities with the highest rates of poverty and risk of food insecurity, access to these facilities can be disrupted during and after extreme events. Decreased access to food pantries following disasters can be particularly problematic as the need for these services is also likely to grow after such events. Despite the vast body of research on food retail access and food environments, relatively little research has utilized spatial analysis to understand food pantry access, particularly after extreme events. Using Geographic Information Systems (GIS), we characterize changes in access to food pantries following flooding events in Harris County, Texas-a highly populated and flood prone region with high levels of food insecurity and poverty. Specifically, our study models disruptions in road networks due to flooding and assesses the impacts of these disruptions on proximity to food pantries. The results reveal that much of Harris County sees only small increases in travel distance to food pantries due to extreme flooding, but some areas may be unable to access food pantries at all. This research highlights the potential and some of the limits of private food assistance networks to support emergency response efforts.

8.
Int J Disaster Risk Reduct ; 80: 103191, 2022 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-35880115

RESUMEN

This paper compares economic recovery in the COVID-19 pandemic with other types of disasters, at the scale of businesses. As countries around the world struggle to emerge from the pandemic, studies of business impact and recovery have proliferated; however, pandemic research is often undertaken without the benefit of insights from long-standing research on past large-scale disruptive events, such as floods, storms, and earthquakes. This paper builds synergies between established knowledge on business recovery in disasters and emerging insights from the COVID-19 pandemic. It first proposes a disaster event taxonomy that allows the pandemic to be compared with natural hazard events from the perspective of economic disruption. The paper then identifies five key lessons on business recovery from disasters and compares them to empirical findings from the COVID-19 pandemic. For synthesis, a conceptual framework on business recovery is developed to support policy-makers to anticipate business recovery needs in economically disruptive events, including disasters. Findings from the pandemic largely resonate with those from disasters. Recovery tends to be more difficult for small businesses, those vulnerable to supply chain problems, those facing disrupted markets, and locally-oriented businesses in heavily impacted neighborhoods. Disaster assistance that is fast and less restrictive provides more effective support for business recovery. Some differences emerge, however: substantial business disruption in the pandemic derived from changes in demand due to regulatory measures as well as consumer behaviour; businesses in high-income neighborhoods and central business districts were especially affected; and traditional forms of financial assistance may need to be reconsidered.

9.
J Allergy Clin Immunol ; 126(2): 267-73, 273.e1, 2010 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-20624640

RESUMEN

BACKGROUND: The Childhood Asthma Control Test (C-ACT) has demonstrated validity in classifying children aged 4 to 11 years as having either "well-controlled" or "not well-controlled" asthma. However, new asthma management guidelines distinguish 3 levels of asthma control. OBJECTIVE: We sought to determine a second cut point on the C-ACT to identify children with "very poorly controlled" asthma. METHODS: Binomial logistic regression was performed on data from 671 children. The specialist's rating of control was the criterion measure. Specialists' severity ratings, specialists' assessment of therapy, and FEV(1) percent predicted were used to assess the clinical validity of the cut point. RESULTS: A cut point of 12 was selected because it correctly classified the highest percentage of participants (66.3%) as having "very poorly controlled" (vs "not well controlled") asthma and demonstrated high specificity (89.8%) and moderate positive predictive value (69.1%). Children scoring 12 or less versus 13 to 19 had lower mean FEV(1) percent predicted (79.8% vs 92.6%, P = .0002) and were more frequently stepped up in therapy (72.9% vs 53.6%, P = .0131) and rated as having severe asthma (13.6% vs 4.5%, P = .0005). One month later, significant differences in C-ACT scores and lung function between these 2 groups persisted. The mean C-ACT score of participants classified as "very poorly controlled" was significantly lower than that of participants classified as "not well-controlled" (17.2 vs 20.3, respectively; P = .0001). CONCLUSION: A second cut point of 12 or less on the C-ACT identifies children with the lowest level of control, who are at risk for poorer outcomes, and is conceptually consistent with the classification of "very poorly controlled" asthma adopted by asthma management guidelines.


Asunto(s)
Asma/fisiopatología , Asma/terapia , Niño , Preescolar , Femenino , Humanos , Modelos Logísticos , Masculino , Guías de Práctica Clínica como Asunto , Pruebas de Función Respiratoria , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Factores de Tiempo
10.
Biochem J ; 417(3): 791-801, 2009 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-18922131

RESUMEN

Saturated fatty acids, such as palmitate, promote accumulation of ceramide, which impairs activation and signalling of PKB (protein kinase B; also known as Akt) to important end points such as glucose transport. SPT (serine palmitoyl transferase) is a key enzyme regulating ceramide synthesis from palmitate and represents a potential molecular target in curbing lipid-induced insulin resistance. In the present study we explore the effects of palmitate upon insulin action in L6 muscle cells in which SPT expression/activity has been decreased by shRNA (small-hairpin RNA) or sustained incubation with myriocin, an SPT inhibitor. Incubation of L6 myotubes with palmitate (for 16 h) increases intramyocellular ceramide and reduces insulin-stimulated PKB activation and glucose uptake. PKB inhibition was not associated with impaired IRS (insulin receptor substrate) signalling and was ameliorated by short-term treatment with myriocin. Silencing SPT expression (approximately 90%) by shRNA or chronic cell incubation with myriocin (for 7 days) markedly suppressed SPT activity and palmitate-driven ceramide synthesis; however, challenging these muscle cells with palmitate still inhibited the hormonal activation of PKB. This inhibition was associated with reduced IRS1/p85-PI3K (phosphoinositide 3-kinase) coupling that arises from diverting palmitate towards greater DAG (diacylglycerol) synthesis, which elevates IRS1 serine phosphorylation via activation of DAG-sensitive PKCs (protein kinase Cs). Treatment of SPT-shRNA cells or those treated chronically with myriocin with PKC inhibitors antagonized palmitate-induced loss in insulin signalling. The findings of the present study indicate that SPT plays a crucial role in desensitizing muscle cells to insulin in response to incubation with palmitate. While short-term inhibition of SPT ameliorates palmitate/ceramide-induced insulin resistance, sustained loss/reduction in SPT expression/activity promotes greater partitioning of palmitate towards DAG synthesis, which impacts negatively upon IRS1-directed insulin signalling.


Asunto(s)
Resistencia a la Insulina/fisiología , Músculo Esquelético/enzimología , Serina C-Palmitoiltransferasa/fisiología , Animales , Fenómenos Biofísicos , Membrana Celular/metabolismo , Diglicéridos/biosíntesis , Insulina/metabolismo , Insulina/farmacología , Proteínas Sustrato del Receptor de Insulina/metabolismo , Músculo Esquelético/metabolismo , Palmitatos/metabolismo , Palmitatos/farmacología , Fosforilación , Ratas , Serina C-Palmitoiltransferasa/genética , Serina C-Palmitoiltransferasa/metabolismo , Transducción de Señal
11.
J Allergy Clin Immunol ; 124(4): 719-23.e1, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19767070

RESUMEN

BACKGROUND: The Asthma Control Test (ACT) has been well validated, but a minimally important difference (MID) has not been established. OBJECTIVE: We sought to identify an MID for the ACT. METHODS: Data come from 4 independent samples of adult asthmatic patients. Distributional methods for determining the MID included 0.5 SD, 1 SEM, and 2 SEM. Anchor-based methods assessed the relationship of differences in ACT scores to (1) self-reported asthma severity, (2) asthma episode frequency in the past 4 weeks, (3) physician ratings of asthma control, (4) physician recommendation of a change in therapy, (5) FEV(1), (6) the risk over the next 12 months of excess short-acting beta-agonist use and exacerbations, and (7) patient-defined changes in asthma course over 3 months. RESULTS: Four thousand one hundred eighteen patients completed the ACT. The 0.5 SD criterion for MID ranged from 2.03 to 2.45 points (mean, 2.2 points). The 1 SEM criterion ranged from 1.77 to 2.05 points (mean, 1.88 points), and the 2 SEM criterion ranged from 3.55 to 4.10 points (mean, 3.75 points). Differences in mean ACT scores across patient groups differing on criterion measures ranged from 1.06 to 5.28 points (mean, 3.1 points). Predictive analyses showed that a difference of 3 points on the ACT was associated with a subsequent 76% increased risk (95% CI, 73% to 79%) of excess short-acting beta-agonist use and a 33% increased risk (95% CI, 31% to 35%) of exacerbations. CONCLUSION: The data support an MID for the ACT of 3 points.


Asunto(s)
Agonistas Adrenérgicos beta/uso terapéutico , Asma/tratamiento farmacológico , Encuestas y Cuestionarios , Adulto , Asma/inmunología , Femenino , Humanos , Masculino , Persona de Mediana Edad
12.
FEBS Lett ; 581(24): 4743-8, 2007 Oct 02.
Artículo en Inglés | MEDLINE | ID: mdl-17869249

RESUMEN

Peroxisome proliferator-activated receptor-delta (PPARdelta) activation enhances skeletal muscle fatty acid oxidation and improves whole body glucose homeostasis and insulin sensitivity. Recently, GW501516, a selective PPARdelta agonist, was reported to increase glucose uptake in human skeletal myotubes by an AMPK-dependent mechanism that may contribute to the improved glucose tolerance. Here, we demonstrate that whilst GW501516 increases expression of PGC-1alpha and CPT-1 and stimulates fatty-acid oxidation in L6 myotubes, it fails to enhance insulin sensitivity, AMPK activity or glucose uptake and storage. Our findings exclude sarcolemmal glucose transport as a potential target for the therapeutic action of PPARdelta agonists in skeletal muscle.


Asunto(s)
Ácidos Grasos/metabolismo , Glucosa/metabolismo , Insulina/farmacología , Músculo Esquelético/efectos de los fármacos , PPAR delta/agonistas , PPAR delta/metabolismo , Tiazoles/farmacología , Animales , Carnitina O-Palmitoiltransferasa/metabolismo , Línea Celular , Glucógeno/biosíntesis , Fibras Musculares Esqueléticas/efectos de los fármacos , Fibras Musculares Esqueléticas/metabolismo , Músculo Esquelético/metabolismo , Oxidación-Reducción/efectos de los fármacos , Coactivador 1-alfa del Receptor Activado por Proliferadores de Peroxisomas gamma , Proteínas de Unión al ARN/metabolismo , Ratas , Sensibilidad y Especificidad , Factores de Transcripción/metabolismo
13.
Value Health ; 10 Suppl 2: S76-85, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17995477

RESUMEN

OBJECTIVE: To discuss issues in the design of a measurement strategy related to the use of patient-reported outcomes (PROs) in support of a labelling claim. METHODS: In association with the release by the US Food and Drug Administration of its draft guidance on the use of PROs to support labeling claims, the Mayo/FDA Patient-Reported Outcomes Consensus Writing Group was formed. This paper, part of a series of manuscripts produced by the Writing Group, focuses on designing a PRO measurement strategy. RESULTS: Developing a PRO measurement strategy begins with a clear statement about the proposed label claim that will derive from the PRO data. Investigators should identify the relevant domains to measure, develop a conceptual framework, identify alternative approaches for measuring the domains, and synthesize the information to design the measurement strategy. Often, there is not an already existing single instrument that has been developed and validated for the purposes of a given study. In such cases, investigators may consider supplementing an already existing questionnaire with additional scales or questions, modifying already existing instruments for a new application or patient population, or developing a new instrument altogether. The level of revalidation required for modifications and adaptations depends on the extent of the changes made. Revalidation requirements may range from cognitive testing/debriefing to confirm that subjects respond to the new instrument as expected to full-scale reliability and validity evaluations. CONCLUSION: A position of "reasonable pragmatism" is recommended such that the best available measurement strategy be considered as evidence for labeling.


Asunto(s)
Ensayos Clínicos como Asunto/estadística & datos numéricos , Recolección de Datos/métodos , Satisfacción del Paciente/estadística & datos numéricos , Etiquetado de Productos/normas , Resultado del Tratamiento , Recolección de Datos/estadística & datos numéricos , Humanos , Etiquetado de Productos/estadística & datos numéricos , Psicometría , Proyectos de Investigación , Estados Unidos , Estudios de Validación como Asunto
14.
Biochem J ; 399(3): 473-81, 2006 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-16822230

RESUMEN

An increase in circulating levels of specific NEFAs (non-esterified fatty acids) has been implicated in the pathogenesis of insulin resistance and impaired glucose disposal in skeletal muscle. In particular, elevation of SFAs (saturated fatty acids), such as palmitate, has been correlated with reduced insulin sensitivity, whereas an increase in certain MUFAs and PUFAs (mono- and poly-unsaturated fatty acids respectively) has been suggested to improve glycaemic control, although the underlying mechanisms remain unclear. In the present study, we compare the effects of palmitoleate (a MUFA) and palmitate (a SFA) on insulin action and glucose utilization in rat L6 skeletal muscle cells. Basal glucose uptake was enhanced approx. 2-fold following treatment of cells with palmitoleate. The MUFA-induced increase in glucose transport led to an associated rise in glucose oxidation and glycogen synthesis, which could not be attributed to activation of signalling proteins normally modulated by stimuli such as insulin, nutrients or cell stress. Moreover, although the MUFA-induced increase in glucose uptake was slow in onset, it was not dependent upon protein synthesis, but did, nevertheless, involve an increase in the plasma membrane abundance of GLUT1 and GLUT4. In contrast, palmitate caused a substantial reduction in insulin signalling and insulin-stimulated glucose transport, but was unable to antagonize the increase in transport elicited by palmitoleate. Our findings indicate that SFAs and MUFAs exert distinct effects upon insulin signalling and glucose uptake in L6 muscle cells and suggest that a diet enriched with MUFAs may facilitate uptake and utilization of glucose in normal and insulin-resistant skeletal muscle.


Asunto(s)
Ácidos Grasos Monoinsaturados/farmacología , Glucosa/metabolismo , Células Musculares/efectos de los fármacos , Ácido Palmítico/farmacología , Sistema de Transporte de Aminoácidos A , Sistemas de Transporte de Aminoácidos/metabolismo , Aminoácidos/metabolismo , Ácidos Aminoisobutíricos/metabolismo , Animales , Transporte Biológico/efectos de los fármacos , Membrana Celular/metabolismo , Células Cultivadas/efectos de los fármacos , Células Cultivadas/metabolismo , Medio de Cultivo Libre de Suero , Cicloheximida/farmacología , Inhibidores Enzimáticos/farmacología , Transportador de Glucosa de Tipo 1/metabolismo , Transportador de Glucosa de Tipo 4/metabolismo , Glucógeno/biosíntesis , Glucógeno Sintasa Quinasa 3/antagonistas & inhibidores , Glucógeno Sintasa Quinasa 3/metabolismo , Insulina/farmacología , Resistencia a la Insulina , Modelos Biológicos , Células Musculares/metabolismo , Proteínas Musculares/biosíntesis , Ácido Oléico/metabolismo , Oxidación-Reducción/efectos de los fármacos , Fosforilación/efectos de los fármacos , Inhibidores de la Síntesis de la Proteína/farmacología , Transporte de Proteínas/efectos de los fármacos , Proteínas Proto-Oncogénicas c-akt/antagonistas & inhibidores , Proteínas Proto-Oncogénicas c-akt/metabolismo , Ratas , Proteínas Quinasas S6 Ribosómicas 70-kDa/antagonistas & inhibidores , Proteínas Quinasas S6 Ribosómicas 70-kDa/metabolismo
15.
J Public Health Dent ; 76(4): 303-313, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27126734

RESUMEN

OBJECTIVES: To introduce a multi-site assessment of oral health literacy and to describe preliminary analyses of the relationships between health literacy and selected oral health outcomes within the context of a comprehensive conceptual model. METHODS: Data for this analysis came from the Multi-Site Oral Health Literacy Research Study (MOHLRS), a federally funded investigation of health literacy and oral health. MOHLRS consisted of a broad survey, including several health literacy assessments, and measures of attitudes, knowledge, and other factors. The survey was administered to 922 initial care-seeking adult patients presenting to university-based dental clinics in California and Maryland. For this descriptive analysis, confidence filling out forms, word recognition, and reading comprehension comprised the health literacy assessments. Dental visits, oral health functioning, and dental self-efficacy were the outcomes. RESULTS: Overall, up to 21% of participants reported having difficulties with practical health literacy tasks. After controlling for sociodemographic confounders, no health literacy assessment was associated with dental visits or dental caries self-efficacy. However, confidence filling out forms and word recognition were each associated with oral health functioning and periodontal disease self-efficacy. CONCLUSIONS: Our analysis showed that dental school patients exhibit a range of health literacy abilities. It also revealed that the relationship between health literacy and oral health is not straightforward, depending on patient characteristics and the unique circumstances of the encounter. We anticipate future analyses of MOHLRS data will answer questions about the role that health literacy and various mediating factors play in explaining oral health disparities.


Asunto(s)
Alfabetización en Salud , Salud Bucal , Adolescente , Adulto , Anciano , California , Femenino , Conocimientos, Actitudes y Práctica en Salud , Humanos , Masculino , Maryland , Persona de Mediana Edad , Encuestas y Cuestionarios
16.
J Am Dent Assoc ; 136(9): 1231-40, 2005 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-16196228

RESUMEN

BACKGROUND: The Hispanic population has become the largest minority group in the United States, resulting in an increase in oral health care demands. Developing a research agenda and promoting collaboration on Latino oral health issues are crucial. METHODS: The Hispanic Dental Association and the University of Puerto Rico, School of Dentistry, San Juan, convened a workshop of health care providers and other experts to examine the current state of Hispanic oral health research and identify gaps in existing data and research methods. Participants were asked to break out into small groups to discuss research priorities. RESULTS: The participants discussed the following research areas: population-based studies, social and behavioral sciences, health promotion and communications, gene-environment interactions, and research training and workforce development. Participants emphasized the importance of understanding variations among subgroups within the Hispanic population in the development of future studies. CONCLUSIONS: Participants recommended collaborative research studies to advance existing oral disease prevention and oral health promotion efforts, with a stronger focus on the development of a multidisciplinary pipeline of researchers participating in Latino oral health research to address the growing needs of this population. Practice Implications. Building an infrastructure for research training and workforce development would supply researchers with the necessary tools to develop new studies that could affect the overall oral health of the Latino population. The translation and dissemination of these research findings will benefit clinicians by leading to a better understanding of new trends and specific population needs, as well as appropriate targeted interventions.


Asunto(s)
Accesibilidad a los Servicios de Salud , Investigación sobre Servicios de Salud , Hispánicos o Latinos , Salud Bucal , Proyectos de Investigación , Ciencias de la Conducta , Comunicación , Diversidad Cultural , Atención Odontológica , Ambiente , Prioridades en Salud , Promoción de la Salud , Necesidades y Demandas de Servicios de Salud , Hispánicos o Latinos/genética , Humanos , Grupos Minoritarios , Vigilancia de la Población , Factores de Riesgo , Ciencias Sociales , Estados Unidos
17.
Curr Protoc Cytom ; 71: 6.36.1-6.36.9, 2015 Jan 05.
Artículo en Inglés | MEDLINE | ID: mdl-25559224

RESUMEN

Rapid progress is being made to understand the regulatory mechanisms that underlie the epigenetic control of gene expression through histone modification. It is now recognized that this plays a major role in normal development and disease. This unit describes the application of flow cytometry to the study of epigenetic mechanisms by combining labeling of individual histone modifications and phenotypic markers, and it also discusses practical issues to optimize staining. The focus is on normal blood and samples from leukemia patients, but it can also be applied to cells grown in tissue culture.


Asunto(s)
Sangre/metabolismo , Epigénesis Genética , Citometría de Flujo/métodos , Histonas/metabolismo , Biomarcadores/metabolismo , Humanos , Fijación del Tejido
18.
J Health Care Poor Underserved ; 24(2): 671-87, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23728035

RESUMEN

The goal of this project was to engage community members and grassroots organizations in a discussion regarding perceived mental health needs and priorities of the population of underserved Latinos in Montgomery County, Maryland. Community-based participatory research was used to establish structures for participation and to design studies that effectively address local mental health needs. Four focus groups with 30 Latino lay health promoters and 20 key informant interviews were conducted to ascertain communal mental health needs and priorities. The main issues that emerged included mental health stigma, consequences of immigration-related stress, violence and alcoholism, and concerns about psychotropic medications. Ideas to address these issues and foster wellness through research were generated during a community-based workshop that included consumers, primary care and mental health clinicians, researchers, and representatives of local organizations and federal agencies. The product of this process was an implementable mental health research agenda, which is presented and discussed.


Asunto(s)
Investigación Participativa Basada en la Comunidad/organización & administración , Hispánicos o Latinos/psicología , Salud Mental/etnología , Pobreza/psicología , Poblaciones Vulnerables/psicología , Aculturación , Adulto , Emigración e Inmigración , Femenino , Promoción de la Salud , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Necesidades , Estigma Social , Estrés Psicológico/etnología , Trastornos Relacionados con Sustancias/etnología , Violencia/etnología
19.
PLoS One ; 6(10): e25975, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21998735

RESUMEN

BACKGROUND: Sustained exposure of pancreatic ß cells to an increase in saturated fatty acids induces pleiotropic effects on ß-cell function, including a reduction in stimulus-induced insulin secretion. The objective of this study was to investigate the effects of chronic over supply of palmitate upon glucose- and amino acid-stimulated insulin secretion (GSIS and AASIS, respectively) and autocrine-dependent insulin signalling with particular focus on the importance of ceramide, ERK and CaMKII signalling. PRINCIPAL FINDINGS: GSIS and AASIS were both stimulated by >7-fold resulting in autocrine-dependent activation of protein kinase B (PKB, also known as Akt). Insulin release was dependent upon nutrient-induced activation of calcium/calmodulin-dependent protein kinase II (CaMKII) and extracellular signal-regulated kinase (ERK) as their pharmacological inhibition suppressed GSIS/AASIS significantly. Chronic (48 h, 0.4 mM) palmitate treatment blunted glucose/AA-induced activation of CaMKII and ERK and caused a concomitant reduction (~75%) in GSIS/AASIS and autocrine-dependent activation of PKB. This inhibition could not be attributed to enhanced mitochondrial fatty acid uptake/oxidation or ceramide synthesis, which were unaffected by palmitate. In contrast, diacylglycerol synthesis was elevated suggesting increased palmitate esterification rather than oxidation may contribute to impaired stimulus-secretion coupling. Consistent with this, 2-bromopalmitate, a non-oxidisable palmitate analogue, inhibited GSIS as effectively as palmitate. CONCLUSIONS: Our results exclude changes in ceramide content or mitochondrial fatty acid handling as factors initiating palmitate-induced defects in insulin release from MIN6 ß cells, but suggest that reduced CaMKII and ERK activation associated with palmitate overload may contribute to impaired stimulus-induced insulin secretion.


Asunto(s)
Aminoácidos/farmacología , Comunicación Autocrina/efectos de los fármacos , Glucosa/farmacología , Células Secretoras de Insulina/citología , Células Secretoras de Insulina/metabolismo , Insulina/metabolismo , Palmitatos/farmacología , Animales , Apoptosis/efectos de los fármacos , Proteína Quinasa Tipo 2 Dependiente de Calcio Calmodulina/metabolismo , Línea Celular , Activación Enzimática/efectos de los fármacos , Secreción de Insulina , Células Secretoras de Insulina/efectos de los fármacos , Proteína Quinasa 1 Activada por Mitógenos/metabolismo , Proteína Quinasa 3 Activada por Mitógenos/metabolismo , Transducción de Señal/efectos de los fármacos , Factores de Tiempo
20.
Clin Ther ; 33(10): 1413-32, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21999885

RESUMEN

OBJECTIVE: The objective of this systematic literature review was to evaluate the incidences and risks for adverse events (AEs) associated with oral and parenteral corticosteroids. An assessment was performed to estimate the costs of such AEs. METHODS: A systematic review of literature published from 2007 to 2009 was conducted to identify the incidence rates and risk ratios of corticosteroid-related AEs. The review protocol was developed according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. The literature search was expanded to include additional search terms for psychiatric conditions, infections, and peptic ulcers. Costs obtained from a separate narrative literature review were applied to AEs likely to affect third-party payers in the United States. RESULTS: A total of 357 publications were identified from the primary (n = 323) and secondary (n = 34) searches. Of these, 310 were excluded because they did not evaluate AEs related to corticosteroids, were an excluded publication type, or for other reasons. A final list of 47 studies were used for data extraction. Across patient populations, the most frequently reported corticosteroid-associated AEs were psychiatric events, infections, gastric conditions, and fractures. Corticosteroid-associated AEs reported to occur at an incidence >30% were sleep disturbances, lipodystrophy, adrenal suppression, metabolic syndrome, weight gain, and hypertension. Vertebral fractures were reported at an incidence of 21% to 30%. Dose-response relationships were documented for fractures, acute myocardial infarction, hypertension, and peptic ulcer. The costs of managing AEs that may occur with corticosteroids can be substantial. The literature reported 1-year per-patient costs of up to $26,471.80 for nonfatal myocardial infarction, and per-event costs as high as $18,357.90 for fracture. The findings from the present review should be interpreted cautiously due to several limitations, including the retrospective design of most of the studies identified, risk for confounding due to underlying disease activity or patient population, and the relatively small number of studies that reported each AE association. As this cost analysis was preliminary, a comprehensive pharmacoeconomic analysis should be undertaken to confirm the findings. CONCLUSION: Based on the findings from this review, systemic corticosteroids are a common cause of AEs that may be costly to payers.


Asunto(s)
Corticoesteroides/efectos adversos , Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos/economía , Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos/epidemiología , Sistemas de Registro de Reacción Adversa a Medicamentos , Costos y Análisis de Costo , Relación Dosis-Respuesta a Droga , Humanos , Incidencia , Estados Unidos/epidemiología
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA