Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 51
Filtrar
1.
Child Adolesc Ment Health ; 23(4): 328-333, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30410423

RESUMEN

BACKGROUND: Many CAMHS teams across the UK are now required to use Routine Outcome Monitoring (ROM). However, some clinicians hold negative attitudes towards ROM and various practical implementation issues have been identified. METHOD: The aim of this study was to explore clinician experiences of using ROM in the context of an 'enforced' initial implementation initiative. Twenty clinicians were surveyed at the beginning (T1) and end (T2) of the six-month period in a large UK CAMHS network adopting CYP-IAPT practice. Changes in the use of and attitudes towards ROM were investigated, as well as barriers to implementation. RESULTS: Overall, a small but significant increase in clinician use of ROM was observed from T1 to T2, but attitudes towards ROM did not change significantly. On the whole, clinicians were more positive than negative about ROM during the implementation period, but key implementation challenges included clinician concerns about the value and (mis)use of ROM data, poor technological support and additional workload demands. CONCLUSIONS: CAMHS clinicians will not necessarily become more receptive to ROM simply as a by-product of being asked to use it more. Seeking clinician feedback at the early stages of implementation can help provide a focus for improvement efforts. Ideas for future research and important limitations of the study are discussed.

2.
Prev Vet Med ; 126: 159-69, 2016 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-26907209

RESUMEN

Viruses play a key role in the complex aetiology of bovine respiratory disease (BRD). Bovine viral diarrhoea virus 1 (BVDV-1) is widespread in Australia and has been shown to contribute to BRD occurrence. As part of a prospective longitudinal study on BRD, effects of exposure to BVDV-1 on risk of BRD in Australian feedlot cattle were investigated. A total of 35,160 animals were enrolled at induction (when animals were identified and characteristics recorded), held in feedlot pens with other cattle (cohorts) and monitored for occurrence of BRD over the first 50days following induction. Biological samples collected from all animals were tested to determine which animals were persistently infected (PI) with BVDV-1. Data obtained from the Australian National Livestock Identification System database were used to determine which groups of animals that were together at the farm of origin and at 28days prior to induction (and were enrolled in the study) contained a PI animal and hence to identify animals that had probably been exposed to a PI animal prior to induction. Multi-level Bayesian logistic regression models were fitted to estimate the effects of exposure to BVDV-1 on the risk of occurrence of BRD. Although only a total of 85 study animals (0.24%) were identified as being PI with BVDV-1, BVDV-1 was detected on quantitative polymerase chain reaction in 59% of cohorts. The PI animals were at moderately increased risk of BRD (OR 1.9; 95% credible interval 1.0-3.2). Exposure to BVDV-1 in the cohort was also associated with a moderately increased risk of BRD (OR 1.7; 95% credible interval 1.1-2.5) regardless of whether or not a PI animal was identified within the cohort. Additional analyses indicated that a single quantitative real-time PCR test is useful for distinguishing PI animals from transiently infected animals. The results of the study suggest that removal of PI animals and/or vaccination, both before feedlot entry, would reduce the impact of BVDV-1 on BRD risk in cattle in Australian feedlots. Economic assessment of these strategies under Australian conditions is required.


Asunto(s)
Diarrea Mucosa Bovina Viral/epidemiología , Virus de la Diarrea Viral Bovina Tipo 1 , Alimentación Animal/virología , Crianza de Animales Domésticos , Animales , Anticuerpos Antivirales/sangre , Diarrea Mucosa Bovina Viral/diagnóstico , Diarrea Mucosa Bovina Viral/prevención & control , Diarrea Mucosa Bovina Viral/transmisión , Bovinos , Estudios de Cohortes , Virus de la Diarrea Viral Bovina Tipo 1/genética , Virus de la Diarrea Viral Bovina Tipo 1/aislamiento & purificación , Prevalencia , Reacción en Cadena en Tiempo Real de la Polimerasa/veterinaria , Factores de Riesgo , Vacunas Virales/administración & dosificación
3.
Scand J Med Sci Sports ; 26(10): 1180-7, 2016 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26407530

RESUMEN

Skeletal muscle responds to endurance exercise with an improvement of biochemical pathways that support substrate supply and oxygen-dependent metabolism. This is reflected by enhanced expression of associated factors after exercise and is specifically modulated by tissue perfusion and oxygenation. We hypothesized that transcript expression of pro-angiogenic factors (VEGF, tenascin-C, Angpt1, Angpt1R) and oxygen metabolism (COX4I1, COX4I2, HIF-1α) in human muscle after an endurance stimulus depends on vasoconstriction, and would be modulated through angiotensin-converting enzyme inhibition by intake of lisinopril. Fourteen non-specifically trained, male Caucasians subjects, carried out a single bout of standardized one-legged bicycle exercise. Seven of the participants consumed lisinopril in the 3 days before exercise. Biopsies were collected pre- and 3 h post-exercise from the m. vastus lateralis. COX4I1 (P = 0.03), COX4I2 (P = 0.04) mRNA and HIF-1α (P = 0.05) mRNA and protein levels (P = 0.01) showed an exercise-induced increase in the group not consuming the ACE inhibitor. Conversely, there was a specific exercise-induced increase in VEGF transcript (P = 0.04) and protein levels (P = 0.03) and a trend for increased tenascin-c transcript levels (P = 0.09) for subjects consuming lisinopril. The observations indicate that exercise-induced expression of transcripts involved in angiogenesis and mitochondrial energy metabolism are to some extent regulated via a hypoxia-related ACE-dependent mechanism.


Asunto(s)
Inhibidores de la Enzima Convertidora de Angiotensina/farmacología , Ejercicio Físico/fisiología , Lisinopril/farmacología , Mitocondrias/genética , ARN/metabolismo , Transcripción Genética/efectos de los fármacos , Adulto , Angiopoyetina 1/genética , Angiopoyetina 1/metabolismo , Complejo IV de Transporte de Electrones/genética , Complejo IV de Transporte de Electrones/metabolismo , Metabolismo Energético/efectos de los fármacos , Prueba de Esfuerzo , Humanos , Subunidad alfa del Factor 1 Inducible por Hipoxia/genética , Subunidad alfa del Factor 1 Inducible por Hipoxia/metabolismo , Masculino , Mitocondrias/metabolismo , Neovascularización Fisiológica/efectos de los fármacos , Músculo Cuádriceps/fisiología , ARN Mitocondrial , Tenascina/genética , Tenascina/metabolismo , Factor A de Crecimiento Endotelial Vascular/genética , Factor A de Crecimiento Endotelial Vascular/metabolismo , Adulto Joven
4.
Free Radic Biol Med ; 70: 23-32, 2014 May.
Artículo en Inglés | MEDLINE | ID: mdl-24525000

RESUMEN

Several redox-regulated responses to an acute exercise bout fail in aged animal skeletal muscle, including the ability to upregulate the expression of antioxidant defense enzymes and heat shock proteins (HSPs). These findings are generally derived from studies on sedentary rodent models and thus may be related to reduced physical activity and/or intraspecies differences as opposed to aging per se. This study, therefore, aimed to determine the influence of age and training status on the expression of HSPs, antioxidant enzymes, and NO synthase isoenzymes in quiescent and exercised human skeletal muscle. Muscle biopsy samples were obtained from the vastus lateralis before and 3 days after an acute high-intensity-interval exercise bout in young trained, young untrained, old trained, and old untrained subjects. Levels of HSP72, PRX5, and eNOS were significantly higher in quiescent muscle of older compared with younger subjects, irrespective of training status. 3-NT levels were elevated in muscles of the old untrained but not the old trained state, suggesting that lifelong training may reduce age-related macromolecule damage. SOD1, CAT, and HSP27 levels were not significantly different between groups. HSP27 content was upregulated in all groups studied postexercise. HSP72 content was upregulated to a greater extent in muscle of trained compared with untrained subjects postexercise, irrespective of age. In contrast to every other group, old untrained subjects failed to upregulate CAT postexercise. Aging was associated with a failure to upregulate SOD2 and a downregulation of PRX5 in muscle postexercise, irrespective of training status. In conclusion, lifelong training is unable to fully prevent the progression toward a more stressed muscular state as evidenced by increased HSP72, PRX5, and eNOS protein levels in quiescent muscle. Moreover, lifelong training preserves some (e.g., CAT) but not all (e.g., SOD2, HSP72, PRX5) of the adaptive redox-regulated responses after an acute exercise bout. Collectively, these data support many but not all of the findings from previous animal studies and suggest parallel aging effects in humans and mice at rest and after exercise that are not modulated by training status in human skeletal muscle.


Asunto(s)
Antioxidantes/metabolismo , Ejercicio Físico/fisiología , Proteínas de Choque Térmico HSP27/metabolismo , Músculo Esquelético/metabolismo , Envejecimiento , Animales , Biopsia , Humanos , Ratones , Músculo Esquelético/fisiología , Oxidación-Reducción , Condicionamiento Físico Animal
5.
Biogerontology ; 13(6): 621-31, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23187721

RESUMEN

The aim of the present study was to examine the effects of ageing and training status on (1) markers of skeletal muscle mitochondrial content and (2) the ability to activate the acute signalling pathways associated with regulating exercise-induced mitochondrial biogenesis. Muscle biopsies were obtained from the vastus lateralis muscle of young untrained (24 ± 4 years, n = 6; YU), young trained (22 ± 3 years, n = 6; YT), old untrained (65 ± 6 years, n = 6; OU) and old trained (64 ± 3 years, n = 6; OT) healthy males before and after (3 h and 3 days post-exercise) completion of high-intensity interval cycling exercise. In resting muscle, lifelong training preserved mtDNA, PGC-1α and COXIV protein content such that muscles from OT individuals were comparable to muscles from both YU and YT individuals, whereas lifelong sedentary behaviour reduced such markers of mitochondrial content. Regardless of age or training status, acute exercise induced comparable increases in p38MAPK phosphorylation immediately post-exercise, PGC-1α and COXIV mRNA expression at 3 h post-exercise and COXIV protein at 3 days post-exercise. Data demonstrate that lifelong endurance training preserves skeletal muscle PGC-1α content and that despite the mitochondrial dysfunction typically observed with sedentary ageing, muscles from sedentary elderly individuals retain the capacity to activate the acute signalling pathways associated with regulating the early processes of mitochondrial biogenesis. We consider our data to have immediate translational potential as they highlight the potential therapeutic effects of exercise to induce skeletal muscle mitochondrial biogenesis persist late in adulthood, even after a lifetime of physical inactivity.


Asunto(s)
Prueba de Esfuerzo/métodos , Mitocondrias/fisiología , Esfuerzo Físico/fisiología , Aptitud Física/fisiología , Músculo Cuádriceps , Conducta Sedentaria , Adulto , Factores de Edad , Anciano , Biopsia , ADN Mitocondrial/metabolismo , Complejo IV de Transporte de Electrones/metabolismo , Proteínas de Choque Térmico/metabolismo , Humanos , Masculino , Persona de Mediana Edad , Coactivador 1-alfa del Receptor Activado por Proliferadores de Peroxisomas gamma , Fosforilación , Músculo Cuádriceps/metabolismo , Músculo Cuádriceps/patología , Transducción de Señal , Factores de Transcripción/metabolismo , Proteínas Quinasas p38 Activadas por Mitógenos/metabolismo
7.
Knee ; 16(3): 228-30, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19101150

RESUMEN

Localization of the centre of the femoral head is vital when using extra-medullary femoral alignment systems in knee arthroplasty. This study investigated the accuracy of a palpable marker placed in the groin for detecting the centre of the femoral head. A table tennis ball, 38 mm in diameter, was taped 2.5 cm perpendicular to the mid-inguinal point in patients having a plain radiograph of the pelvis. The mean horizontal distance between the centre of the table tennis ball and a vertical line passing through the centre of the femoral head was 8.62 mm (range 0-28.6, SD 6.76). In 100% of cases the horizontal distance between the centre of the table tennis ball and a vertical line passing through the centre of the femoral head was less than one diameter of the table tennis ball. Using a theoretical mechanical axis model our clinical method would confer an error equal to or less than 2 degrees from the weight-bearing axis of the knee in up to 98% of cases. In conclusion, our results suggest that the clinical method reported here provides a simple and reliable way of localizing the centre of the femoral head in knee arthroplasty.


Asunto(s)
Artroplastia de Reemplazo de Rodilla/métodos , Cabeza Femoral/anatomía & histología , Articulación de la Cadera/cirugía , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Cabeza Femoral/diagnóstico por imagen , Articulación de la Cadera/anatomía & histología , Articulación de la Cadera/diagnóstico por imagen , Humanos , Masculino , Persona de Mediana Edad , Fantasmas de Imagen , Equipos y Suministros de Radiación , Radiografía , Reproducibilidad de los Resultados , Adulto Joven
8.
J Neuroendocrinol ; 19(4): 272-84, 2007 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-17355317

RESUMEN

The 3alpha-hydroxy,5alpha-reduced pregnane steroids, allopregnanolone and allotetrahydrodeoxycorticosterone, are the most potent endogenous positive modulators of GABA(A) receptor-mediated inhibition. This study presents the first immunohistochemical examination of the cellular distribution of 3alpha-hydroxy,5alpha-reduced pregnane steroids across the brain. We found a widespread distribution in the adult rat, with dense immunolabelling in the olfactory bulb, striatum and cerebral cortex, and lower density labelling in the brainstem reticular formation. In general terms, this distribution accords with the regional concentrations of 3alpha-hydroxy,5alpha-reduced steroids determined, in other laboratories, by brain region sampling and either gas chromatography-mass fragmentography or radioimmunoassay. However, immunohistochemistry allowed for a more detailed examination of regional distribution and cellular specificity. All immunoreactivity was confined to the cell bodies and thick dendrites of neurones; no identifiable glia were labelled. In most brain areas, the location and morphology of labelled cells identified them as excitatory neurones. In addition, cell populations known to be projecting GABAergic neurones (e.g. cerebellar Purkinje cells) were immunoreactive, whereas local inhibitory neurones generally were not. The cellular distribution of 3alpha-hydroxy,5alpha-reduced steroids suggests that sensory, motor, limbic and homeostatic systems can be influenced by neurosteroids at multiple stages of processing.


Asunto(s)
Mapeo Encefálico , Encéfalo/metabolismo , Corticosterona/análogos & derivados , Neuronas/metabolismo , Pregnanolona/metabolismo , Factores de Edad , Animales , Encéfalo/citología , Corticosterona/metabolismo , Femenino , Inmunohistoquímica , Masculino , Neuronas/clasificación , Ratas , Ratas Wistar , Receptores de GABA-A/metabolismo , Distribución Tisular
10.
J Hum Nutr Diet ; 15(1): 49-58, 2002 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11903790

RESUMEN

BACKGROUND: There is continuing concern over the lack of attention to the nutritional needs of older people in hospitals. A 2-year audit project was undertaken to examine the nutritional care of inpatients in Leicestershire Community Hospitals. METHOD: The methods used included analysis of menu cycles; observation of meal and drink provision, wastage, supplement usage and portion sizes; and patient satisfaction questionnaire examination. RESULTS: Patient menus were nutritionally inadequate for energy, fibre and vitamin D, and protein levels were variable. The percentage of meal wastage and inadequate portion sizes were of concern. Patient satisfaction results were overall positive. CONCLUSION: Patient energy intakes are a major concern with low calorie provision from menus exacerbated by a deficit in recommended portion sizes and a high percentage of meal wastage. Routine audits need to be implemented to monitor both portion size and meal wastage, and to address patient satisfaction issues to improve the overall intakes of patients. Multidisciplinary team input is required to address the above issues and additional recommendations to promote nutrition as a key component in clinical care.


Asunto(s)
Análisis de los Alimentos , Servicio de Alimentación en Hospital/normas , Hospitales Comunitarios/normas , Auditoría Médica/métodos , Fenómenos Fisiológicos de la Nutrición , Calidad de la Atención de Salud/normas , Anciano , Encuestas sobre Dietas , Suplementos Dietéticos , Ingestión de Energía , Femenino , Humanos , Masculino , Planificación de Menú , Evaluación Nutricional , Necesidades Nutricionales , Satisfacción del Paciente , Reino Unido
11.
Plant Physiol ; 127(3): 1279-86, 2001 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-11706206

RESUMEN

In situ measurements of alternative respiratory pathway activity are needed to provide insight into the energy efficiency of plant metabolism under various conditions in the field. The only reliable method at present to measure alternative oxidase (AOX) activity is through measurement of changes in delta(18)O(O(2)), which to date has only been used in laboratory environments. We have developed a cuvette system to measure partitioning of electrons to AOX that is suitable for off-line use and for field experiments. Plant samples are enclosed in airtight cuvettes and O(2) consumption is monitored. Gas samples from the cuvette are stored in evacuated gas containers until measurement of delta(18)O(O(2)). We have validated this method using differing plant material to assess AOX activity. Fractionation factors were calculated from delta(18)O(O(2)) measurements, which could be measured with an accuracy and precision to 0.1 per thousand and 0.3 per thousand, respectively. Potential sources of error are discussed and quantified. Our method provides results similar to those obtained with laboratory incubations on-line to a mass spectrometer but greatly increases the potential for adoption of the stable isotope method.


Asunto(s)
Metabolismo de los Hidratos de Carbono , Magnoliopsida/fisiología , Oxidorreductasas/metabolismo , Oxígeno/metabolismo , Carbohidratos/análisis , Respiración de la Célula , Marcaje Isotópico , Proteínas Mitocondriales , Consumo de Oxígeno , Radioisótopos de Oxígeno , Proteínas de Plantas , Cianuro de Potasio/farmacología , Reproducibilidad de los Resultados , Salicilamidas/farmacología
12.
Curr Biol ; 11(19): 1492-502, 2001 Oct 02.
Artículo en Inglés | MEDLINE | ID: mdl-11591316

RESUMEN

BACKGROUND: The Par-3/Par-6/aPKC complex is a key regulator of cell polarity in a number of systems. In Drosophila, this complex acts at the zonula adherens (adherens junctions) to establish epithelial polarity and helps to orient the mitotic spindle during asymmetric neuroblast divisions. In MDCKII cells, this complex localizes to the zonula occludens (tight junctions) and appears to regulate epithelial polarity. However, the in vivo role of this complex during vertebrate embryogenesis is not known, due to the lack of relevant mutations. RESULTS: We have positionally cloned the zebrafish heart and soul (has) mutation, which affects the morphogenesis of several embryonic tissues, and show that it encodes atypical protein kinase C lambda (aPKC lambda). We find that loss of aPKC lambda affects the formation and maintenance of the zonula adherens in the polarized epithelia of the retina, neural tube, and digestive tract, leading to novel phenotypes, such as the formation of multiple lumens in the developing intestine. In addition, has mutants display defects in gut looping and endodermal organ morphogenesis that appear to be independent of the defects in epithelial polarity. Finally, we show that loss of aPKC lambda leads to defects in spindle orientation during progenitor cell divisions in the neural retina. CONCLUSIONS: Our results show that aPKC lambda is required for the formation and maintenance of the zonula adherens during early epithelial development in vertebrates and demonstrate a previously undescribed yet critical role for this protein in organ morphogenesis. Furthermore, our studies identify the first genetic locus regulating the orientation of cell division in vertebrates.


Asunto(s)
Uniones Adherentes/fisiología , Sistema Digestivo/embriología , Proteína Quinasa C/fisiología , Retina/embriología , Secuencia de Aminoácidos , Animales , Secuencia de Bases , División Celular , Clonación Molecular , ADN Complementario , Sistema Digestivo/metabolismo , Femenino , Humanos , Isoenzimas/genética , Isoenzimas/metabolismo , Isoenzimas/fisiología , Masculino , Ratones , Datos de Secuencia Molecular , Morfogénesis , Mutagénesis , Proteína Quinasa C/genética , Proteína Quinasa C/metabolismo , Retina/fisiología , Pez Cebra/embriología
13.
Rapid Commun Mass Spectrom ; 15(15): 1297-303, 2001.
Artículo en Inglés | MEDLINE | ID: mdl-11466788

RESUMEN

This paper describes the application of a simple chromium reduction furnace which can be interfaced with a dual inlet isotope-ratio mass spectrometer thus providing the capacity for cheap, fast, accurate and precise measurement of deltaD(V-SMOW) by dynamic mass spectrometry. Measurements are precise to the order of < or =0.5 per thousand. Mean 95% confidence intervals for the Vienna Standard Mean Ocean Water (V-SMOW) to Standard Light Antarctic Precipitation (SLAP) range are in the order of 2.5 per thousand and the system is linear over the range -428 to 23,000 per thousand. Memory effects do exist, but are small for natural abundance samples and can be minimised by careful planning of the analytical load.


Asunto(s)
Cromo/química , Deuterio/análisis , Hidrógeno/análisis , Isótopos/análisis , Espectrometría de Masas/métodos , Agua/análisis , Monitoreo del Ambiente/instrumentación , Monitoreo del Ambiente/métodos , Oxidación-Reducción , Agua/química
14.
Genes Dev ; 15(12): 1493-505, 2001 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-11410530

RESUMEN

Early endoderm formation in zebrafish requires at least three loci that function downstream of Nodal signaling but upstream of the early endodermal marker sox17: bonnie and clyde (bon), faust (fau), and casanova (cas). cas mutants show the most severe phenotype as they do not form any gut tissue and lack all sox17 expression. Activation of the Nodal signaling pathway or overexpression of Bon or Fau/Gata5 fails to restore any sox17 expression in cas mutants, demonstrating that cas plays a central role in endoderm formation. Here we show that cas encodes a novel member of the Sox family of transcription factors. Initial cas expression appears in the dorsal yolk syncytial layer (YSL) in the early blastula, and is independent of Nodal signaling. In contrast, endodermal expression of cas, which begins in the late blastula, is regulated by Nodal signaling. Cas is a potent inducer of sox17 expression in wild-type embryos as well as in bon and fau/gata5 mutants. Cas is also a potent inducer of sox17 expression in MZoep mutants, which cannot respond to Nodal signaling. In addition, ectopic expression of cas in presumptive mesodermal cells leads to their transfating into endoderm. Altogether, these data indicate that Cas is the principal transcriptional effector of Nodal signaling during zebrafish endoderm formation.


Asunto(s)
Endodermo/fisiología , Proteínas del Grupo de Alta Movilidad/metabolismo , Transducción de Señal/fisiología , Factores de Transcripción/metabolismo , Proteínas de Pez Cebra , Secuencia de Aminoácidos , Animales , Diferenciación Celular , Proteínas de Unión al ADN/metabolismo , Factor de Transcripción GATA5 , Regulación del Desarrollo de la Expresión Génica , Proteínas del Grupo de Alta Movilidad/clasificación , Proteínas del Grupo de Alta Movilidad/genética , Proteínas de Homeodominio/metabolismo , Humanos , Péptidos y Proteínas de Señalización Intracelular , Mesodermo/citología , Mesodermo/fisiología , Datos de Secuencia Molecular , Ligandos de Señalización Nodal , Proteínas/genética , Factores de Transcripción SOX , Factores de Transcripción SOXF , Homología de Secuencia de Aminoácido , Factores de Transcripción/clasificación , Factores de Transcripción/genética , Factor de Crecimiento Transformador beta/genética , Pez Cebra
15.
Exp Parasitol ; 99(3): 168-74, 2001 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-11846527

RESUMEN

Babesiosis caused by Babesia spp. is a disease of both veterinary and human importance. Here, we describe a method to continuously culture laboratory lines and field isolates of Babesia bovis in vitro in a chemically defined medium using (ALBU)MAX II as an alternative to bovine serum. Further, we have successfully cultured parasite isolates directly from cattle that failed to grow in traditional serum-containing medium. Variation of atmospheric gas composition and culture volumes to determine optimal growth conditions revealed that a 600-microl culture in an atmosphere comprising 5% O(2), 5% CO(2), and 90% N(2) achieved a significantly higher percentage of parasitized red blood cells than any other combination tested. The process could be scaled up to reliably produce large volumes of parasites. Supplementation of the culture medium with hypoxanthine further improved parasite growth. B. bovis cultured in this way could be the basis of an alternative, safer vaccine and a reliable source of parasites and exoantigens for parasitological research.


Asunto(s)
Babesia bovis/crecimiento & desarrollo , Animales , Bovinos , Criopreservación , Medios de Cultivo , Eritrocitos/parasitología , Gases , Hipoxantina/metabolismo , Distribución Aleatoria , Factores de Tiempo
16.
Diabet Med ; 17(8): 565-71, 2000 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-11073177

RESUMEN

AIMS: To survey dietitians involved in diabetes care regarding the provisions for patients with diabetes. METHODS: A national survey of 512 dietitians known to be engaged in provision of diabetes care was conducted in 1997 and 391 (76%) responded. RESULTS: Nationally the median provision of dietetic care for diabetes reported was 10.7 h per 100,000 general population per week, but the provision was uneven ranging from 2.0 to 27.6 h per 100,000. Eighty-five per cent of dietitians worked in areas where the provision was less than 22 h per 100,000 general population per week (the current recommended minimum standard). Dietetic provision was greater in secondary care (median 9.1 h per 100,000 general population per week) than in general practice, residential homes and other locations (median 4.4 h per 100,000 general population per week). Provision was greater in those areas in which a designated dietitian had responsibility for co-ordinating the dietetic service for diabetes than in areas where the co-ordinator was not a dietitian or where there was no co-ordinator. Over 90% of dietitians reported following British Diabetic Association (BDA) recommendations regarding advice on carbohydrate, sugar, fat and fibre consumption, but only one-third routinely advised on salt restriction. Of the 17% of dietitians who continue to use carbohydrate exchanges, all combine this method with other approaches. Of the recommendations made by the Clinical Standards Group, only 69% of dietitians reported seeing more than half of newly diagnosed adult patients within four weeks, and less than 50% reported offering half or more of their patients an annual review. Amongst the literature in current use, 98% of dietitians use BDA literature for teaching patients and 90% use BDA publications in their own education. Seventy-six per cent of dietitians believed that there was a role for commercial slimming organizations in weight management of people with diabetes. CONCLUSIONS: Given the proven value of dietetic input in diabetes management, there would be advantages to correcting the regional inequalities in dietetic provision for diabetes care in the UK.


Asunto(s)
Diabetes Mellitus/rehabilitación , Dieta para Diabéticos , Servicios Dietéticos , Encuestas de Atención de la Salud , Educación del Paciente como Asunto , Adulto , Humanos , Encuestas y Cuestionarios , Reino Unido , Agencias Voluntarias de Salud
17.
Rapid Commun Mass Spectrom ; 14(15): 1325-31, 2000.
Artículo en Inglés | MEDLINE | ID: mdl-10920350

RESUMEN

Many Salmo trutta populations consist of non-anadromous (freshwater-resident) brown trout and anadromous (sea-run migratory) sea trout. Although adult brown trout and sea trout can usually be identified using differences in size and body colouration, it is not possible to easily identify eggs/alevins as the progeny of brown trout or sea trout. In this study we show that delta(13)C and delta(15)N, measured using a continuous flow isotope ratio mass spectrometer (CF-IRMS), can accurately identify fish eggs as the progeny of freshwater-resident (delta(13)C(egg) = -25.7 +/- 1.9 per thousand,delta(15)N(egg) = 9.2 +/- 1.8 per thousand) or migratory (delta(13)C(egg) = -19.9 +/- 1.1 per thousand, delta(15)N(egg) = 14. 3 +/- 1.5 per thousand) adult female Salmo trutta. Case studies show that stable isotope analysis is a more reliable technique for distinguishing anadromous adult fish than differentiation using morphological characteristics. For example, stable isotope analysis of brown trout from Loch Eck, Scotland, revealed that some individuals possessed delta(13)C and delta(15)N signatures indicative of marine feeding despite visual identification as freshwater-resident fish. It is most likely that these fish are misidentified sea trout although it possible that these fish may be brown trout that have adopted an estuarine feeding strategy to avoid interspecific competition for food within Loch Eck with salmon, powan and Arctic charr. Most stable isotope studies of fish ecology use terminal tissue sampling to provide sufficient biological material for isotopic analysis; however, our study suggests that adipose fin tissue could provide a comparable measure of delta(13)C and delta(15)N. Such a strategy would be invaluable when studying the trophic ecology or migration patterns of fish of high conservation value.


Asunto(s)
Conducta Animal , Carbono/análisis , Nitrógeno/análisis , Salmón/metabolismo , Tejido Adiposo/química , Animales , Isótopos de Carbono , Femenino , Espectrometría de Masas , Músculo Esquelético/química , Isótopos de Nitrógeno , Óvulo/química
18.
Nature ; 406(6792): 192-5, 2000 Jul 13.
Artículo en Inglés | MEDLINE | ID: mdl-10910360

RESUMEN

Coordinated cell migration is essential in many fundamental biological processes including embryonic development, organogenesis, wound healing and the immune response. During organogenesis, groups of cells are directed to specific locations within the embryo. Here we show that the zebrafish miles apart (mil) mutation specifically affects the migration of the heart precursors to the midline. We found that mutant cells transplanted into a wild-type embryo migrate normally and that wild-type cells in a mutant embryo fail to migrate, suggesting that mil may be involved in generating an environment permissive for migration. We isolated mil by positional cloning and show that it encodes a member of the lysosphingolipid G-protein-coupled receptor family. We also show that sphingosine-1-phosphate is a ligand for Mil, and that it activates several downstream signalling events that are not activated by the mutant alleles. These data reveal a new role for lysosphingolipids in regulating cell migration during vertebrate development and provide the first molecular clues into the fusion of the bilateral heart primordia during organogenesis of the heart.


Asunto(s)
Corazón/embriología , Lisofosfolípidos , Receptores de Superficie Celular/fisiología , Receptores Acoplados a Proteínas G , Esfingosina/análogos & derivados , Alelos , Animales , Movimiento Celular , Clonación Molecular , Desarrollo Embrionario y Fetal , Proteínas de Unión al GTP/metabolismo , Humanos , Células Jurkat , Datos de Secuencia Molecular , Mutación , Miocardio/citología , Miocardio/metabolismo , Receptores Lisofosfolípidos , Esfingosina/metabolismo , Transfección , Quimera por Trasplante , Pez Cebra
19.
Aust Vet J ; 77(10): 657-9, 1999 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-10590793

RESUMEN

OBJECTIVE: To assess the efficacy of ivermectin and moxidectin to prevent transmission of Babesia bovis and Babesia bigemina by Boophilus microplus to cattle under conditions of relatively intense experimental challenge. DESIGN: Naive Bos taurus calves were treated with either pour-on or injectable formulations of either ivermectin or moxidectin and then exposed to larvae of B microplus infected with B bovis or larvae or adults of B microplus infected with B bigemina. One calf was used for each combination of haemoparasite, B microplus life stage, drug and application route. PROCEDURE: Groups of calves were treated with the test drugs in either pour-on or injectable formulation and then infested with B microplus larvae infected with B bovis or B bigemina. B bigemina infected adult male ticks grown on an untreated calf were later transferred to a fourth group of animals. Infections were monitored via peripheral blood smears to determine haemoparasite transmission. RESULTS: Cattle treated with either pour-on or injectable formulations of ivermectin and moxidectin became infected with B bovis after infestation with infected larvae. Similarly, larvae infected with B bigemina survived to the nymphal stage to transmit the haemoparasite to animals treated with each drug preparation. Cattle treated with pour-on formulations of ivermectin and moxidectin then infested with adult male ticks infected with B bigemina did not become infected with B bigemina whereas those treated with the injectable formulations of ivermectin and moxidectin did show a parasitaemia. CONCLUSIONS: Injectable or pour-on formulations of ivermectin and moxidectin do not prevent transmission of Babesia to cattle by B microplus. Use of these drugs can therefore not be recommended as a primary means of protecting susceptible cattle from the risk of Babesia infection.


Asunto(s)
Antiprotozoarios/administración & dosificación , Babesiosis/transmisión , Enfermedades de los Bovinos/transmisión , Insecticidas/administración & dosificación , Ivermectina/administración & dosificación , Administración Cutánea , Animales , Antibacterianos/administración & dosificación , Vectores Arácnidos/parasitología , Babesia/aislamiento & purificación , Babesiosis/prevención & control , Bovinos , Enfermedades de los Bovinos/parasitología , Enfermedades de los Bovinos/prevención & control , ADN Protozoario/aislamiento & purificación , Técnica del Anticuerpo Fluorescente Indirecta/veterinaria , Inyecciones Subcutáneas/veterinaria , Macrólidos , Masculino , Garrapatas/parasitología
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...