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1.
Phys Rev Lett ; 113(26): 264802, 2014 Dec 31.
Artículo en Inglés | MEDLINE | ID: mdl-25615345

RESUMEN

The performance of accelerators profits from phase-space tailoring by coupling of degrees of freedom. Previously applied techniques swap the emittances among the three degrees but the set of available emittances is fixed. In contrast to these emittance exchange scenarios, the emittance transfer scenario presented here allows for arbitrarily changing the set of emittances as long as the product of the emittances is preserved. This Letter is the first experimental demonstration of transverse emittance transfer along an ion beam line. The amount of transfer is chosen by setting just one single magnetic field value. The envelope functions (beta) and slopes (alpha) of the finally uncorrelated and repartitioned beam at the exit of the transfer line do not depend on the amount of transfer.

2.
Allergy ; 67(6): 758-66, 2012 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-22486768

RESUMEN

BACKGROUND: Carrot is a frequent cause of food allergy in Europe. The objective of this study was to evaluate a panel of carrot allergens for diagnosis of carrot allergy in Spain, Switzerland and Denmark. METHODS: Forty-nine carrot allergic patients, 71 pollen allergic but carrot-tolerant patients and 63 nonatopic controls were included. Serum IgE to carrot extract, recombinant carrot allergens (rDau c 1.0104; rDau c 1.0201; rDau c 4; the isoflavone reductase-like proteins rDau c IFR 1, rDau c IFR 2; the carrot cyclophilin rDau c Cyc) were analyzed by ImmunoCAP. RESULTS: The sensitivity of the carrot extract-based test was 82%. Use of the recombinant allergens increased the sensitivity to 90%. The Dau c 1 isoforms were major allergens for Swiss and Danish carrot allergic patients, the profilin rDau c 4 for the Spanish patients. The rDau c IFR 1 and rDau c IFR 2 were recognized by 6% and 20% of the carrot allergics, but did not contribute to a further increase of sensitivity. Among pollen allergic controls, 34% had IgE to carrot extract, 18% to each of rDau c 1.0104, rDau c 1.0201 and rDau c 4, 8% to rDau c IFR 1 and 7% to rDau c IFR 2. Sensitization to rDau c Cyc occurred in one carrot allergic patient and one nonatopic control. CONCLUSION: Component-resolved in vitro analyses revealed a significant difference in IgE sensitization pattern between geographical regions and in the prevalence of sensitization to carrot components between carrot allergic and carrot-tolerant but pollen sensitized patients.


Asunto(s)
Antígenos de Plantas , Daucus carota/inmunología , Hipersensibilidad a los Alimentos/diagnóstico , Extractos Vegetales , Adulto , Antígenos de Plantas/inmunología , Daucus carota/efectos adversos , Europa (Continente) , Femenino , Humanos , Técnicas In Vitro , Masculino , Persona de Mediana Edad , Extractos Vegetales/inmunología , Isoformas de Proteínas/inmunología , Proteínas Recombinantes/inmunología , Sensibilidad y Especificidad , Adulto Joven
3.
Environ Res ; 112: 28-39, 2012 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-22137101

RESUMEN

Seafood is the predominant food source of several organoarsenic compounds. Some seafood species, like crustaceans and seaweed, also contain inorganic arsenic (iAs), a well-known toxicant. It is unclear whether human biotransformation of ingested organoarsenicals from seafood result in formation of arsenicals of health concern. The present controlled dietary study examined the urinary excretion of arsenic compounds (total arsenic (tAs), iAs, AB (arsenobetaine), dimethylarsinate (DMA) and methylarsonate (MA)) following ingestion of a single test meal of seafood (cod, 780 µg tAs, farmed salmon, 290 µg tAs or blue mussel, 690 µg tAs or potato (control, 110 µg tAs)) in 38 volunteers. The amount of ingested tAs excreted via the urine within 0-72 h varied significantly among the groups: Cod, 74% (52-92%), salmon 56% (46-82%), blue mussel 49% (37-78%), control 45% (30-60%). The estimated total urinary excretion of AB was higher than the amount of ingested AB in the blue mussel group (112%) and also ingestion of cod seemed to result in more AB, indicating possible endogenous formation of AB from other organoarsenicals. Excretion of iAs was lower than ingested (13-22% of the ingested iAs was excreted in the different groups). Although the ingested amount of iAs+DMA+MA was low for all seafood groups (1.2-4.5% of tAs ingested), the urinary DMA excretion was high in the blue mussel and salmon groups, counting for 25% and 11% of the excreted tAs respectively. In conclusion our data indicate a possible formation of AB as a result of biotransformation of other organic arsenicals. The considerable amount of DMA excreted is probably not only due to methylation of ingested iAs, but due to biotransformation of organoarsenicals making it an inappropriate biomarker of iAs exposure in populations with a high seafood intake.


Asunto(s)
Arsenicales/orina , Ácido Cacodílico/orina , Contaminación de Alimentos , Alimentos Marinos , Contaminantes Químicos del Agua/farmacocinética , Adulto , Animales , Biotransformación , Monitoreo del Ambiente , Femenino , Cadena Alimentaria , Contaminación de Alimentos/análisis , Gadiformes/metabolismo , Humanos , Masculino , Mytilus edulis/metabolismo , Noruega , Salmón/metabolismo , Alimentos Marinos/análisis , Adulto Joven
4.
Artículo en Alemán | MEDLINE | ID: mdl-21698540

RESUMEN

In conformity with Regulation (EC) No. 1394/2007, advanced therapy medicinal products (ATMP) are now subject to the centralized marketing authorization procedure. This also applies to most medicinal products in regenerative medicine. ATMP that have been marketed in a member state by the end of 2008 must be centrally authorized by the end of 2012 at the latest. In exceptional cases, a national authorization is acceptable. Developers of these medicinal products are usually academic institutions or small- and medium-sized enterprises (SME). They focus on scientific aspects and usually have little experience with pharmaceutical law. The Innovation Office of the Paul-Ehrlich-Institut (PEI) is designed to support developers of medicinal products in the areas between research and development, on the one hand, and regulatory requirements, on the other. Its main role is supportive advice in the regulatory field with an emphasis on ATMP. For this purpose, the Innovation Office makes use of core competences from various experts at the PEI in order to provide a quality consulting service to those companies who are seeking advice as early as possible and hand in hand with the development process. The aim is to support the developer to identify the appropriate regulatory pathway and to provide advice for each individual medicinal product at its corresponding stage of development in order to develop a high-quality ATMP manufactured on the basis of positive nonclinical results and appropriate clinical studies that meet all the necessary requirements for the application of a marketing authorization.


Asunto(s)
Seguridad de Productos para el Consumidor/legislación & jurisprudencia , Agencias Gubernamentales/legislación & jurisprudencia , Mercadotecnía/legislación & jurisprudencia , Programas Nacionales de Salud/legislación & jurisprudencia , Terapias en Investigación , Ensayos Clínicos como Asunto/legislación & jurisprudencia , Alemania , Humanos , Garantía de la Calidad de Atención de Salud/legislación & jurisprudencia , Derivación y Consulta/legislación & jurisprudencia
5.
Environ Int ; 147: 106322, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33348102

RESUMEN

Oily seafood is an important food source which contains several key nutrients beneficial for human health. On the other hand, oily seafood also contains persistent organic pollutants (POPs), including the dioxin-like compounds (DLCs) polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like-polychlorinated biphenyls (dl-PCBs), potentially detrimental to human health. For a comprehensive comparison of the beneficial and potentially adverse health effects of seafood consumption, risk-benefit analyses are necessary. Risk-benefit analyses require reliable quantitative data and sound knowledge of uncertainties and potential biases. Our dataset comprised more than 4000 analyses of DLCs and more than 1000 analyses each of docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA) and vitamin D in the three most important Norwegian commercial oily seafood species: Atlantic herring (Clupea harengus), Atlantic mackerel (Scomber scombrus) and farmed Atlantic salmon (Salmo salar). The levels of several DLC congeners were below the limit of quantification (LOQ), making estimation of true levels challenging. We demonstrate that the use of upper bound substitution of censored data will overestimate, while lower bound substitution will underestimate the actual levels of DLCs. Therefore, we implement an alternative robust statistical method by combining Maximum Likelihood Estimation, Regression on Order Statistics and Kaplan-Meier analyses, which is better suited for providing estimations of levels of these contaminants in seafood. Moreover, we illustrate the impact of the toxic equivalency factor (TEF) system on estimation of the sums of DLCs by comparing the TEF system to an alternative system of relative effect potency (REP) factors (Consensus Toxicity Factors). The levels of nutrients and contaminants were related to adequate intake (AI) and tolerable weekly intake (TWI), respectively. We used AI and the TWI values established by the European Food Safety Authority (EFSA). The benefit and the risk were further viewed in the context of the Norwegian average intake of oily fish, and the Norwegian governmental official dietary recommendations of oily fish. Our results showed that both benefit and risk are met at the levels found of nutrients and DLCs in oily seafood. The comprehensive quantitative data presented here will be a key for future risk-benefit assessment of oily fish consumption. Together, our results underline that a refined formalized integrative risk-benefit assessment of oily fish in the diet is warranted, and that the data and methodology presented in this study are highly relevant for future integrated and multidisciplinary assessment of both risks and benefits of seafood consumption for human health.


Asunto(s)
Dioxinas , Ácidos Grasos Omega-3 , Bifenilos Policlorados , Dibenzodioxinas Policloradas , Animales , Dibenzofuranos , Dioxinas/análisis , Dioxinas/toxicidad , Ácidos Grasos Omega-3/análisis , Contaminación de Alimentos/análisis , Humanos , Noruega , Nutrientes , Bifenilos Policlorados/análisis , Medición de Riesgo , Alimentos Marinos/análisis , Vitamina D
6.
J Exp Med ; 136(2): 318-30, 1972 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-5043414

RESUMEN

Among genetically hypertension-prone rats, dietary sodium (chloride) was demonstrably hypertensinogenic and potassium (chloride) antihypertensinogenic. On diets containing the same NaCl but different KCl concentrations, mean blood pressure was greater in rats receiving less dietary potassium, i.e., diets with a higher Na/K molar ratio. On diets with different absolute concentrations of NaCl and KCl, but the same Na/K molar ratios, rats on the higher absolute NaCl intakes had the higher blood pressures. On diets with different absolute concentrations of NaCl and KCl, and different Na/K molar ratios, a group on a lower absolute NaCl intake but with a higher Na/K ratio could have more hypertension than a group on a higher absolute NaCl intake but with a lower Na/K ratio. At equivalent molar ratios, the respective effects of these two ions on blood pressure were dominated by that of sodium. It was concluded that the dietary Na/K molar ratio can be an important determinant for the severity, or even development, of salt-induced hypertension. The mechanism of the moderating effect of potassium on sodium-induced hypertension was unclear.


Asunto(s)
Hipertensión/inducido químicamente , Cloruro de Potasio , Cloruro de Sodio , Análisis de Varianza , Animales , Presión Sanguínea/efectos de los fármacos , Dieta , Masculino , Concentración Osmolar , Ratas , Ratas Endogámicas
7.
J Exp Med ; 131(3): 543-57, 1970 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-4312940

RESUMEN

TWO STRAINS OF RATS WITH OPPOSITE GENETIC PROPENSITY FOR HYPERTENSION WERE TESTED FOR: (a) the sensitivity to injections of angiotensin and renin, and (b) the influence of their plasma on the reaction velocity of renin and its substrate in vitro. Intact hypertension-prone (S) rats on low salt had higher sensitivity to angiotensin and a lower sensitivity to renin than hypertension-resistant (R) rats. High NaCl diet did not change the response of the R rats to these injections, but increased the response to renin and angiotensin in intact S rats. Bilateral nephrectomy caused increased response to renin and a decreased response to angiotensin in the S rats, so that both strains were equivalent after bilateral nephrectomy. In vitro, plasma from intact S rats inhibited the activity of hog renin. Plasma from R rats showed no inhibition. The inhibitor disappeared after bilateral nephrectomy. It was speculated that renin inhibitor may be involved in the development of hypertension by increasing sensitivity to angiotensin and other hypertensinogenic stimuli.


Asunto(s)
Angiotensina II/sangre , Hipertensión Renal/sangre , Hipertensión/sangre , Renina/antagonistas & inhibidores , Renina/sangre , Animales , Ratas , Renina/farmacología
8.
J Exp Med ; 126(4): 687-99, 1967 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-6058221

RESUMEN

Parabiosis has been found to modify the expected blood pressure response of rats from two strains with opposite genetic propensities for experimental hypertension. When a member from one strain was united in parabiosis with a member from the other and both were maintained on high NaCl diet, the rat from the strain ordinarily resistant to it rapidly developed hypertension, in contrast to appropriate controls from this strain. The development of hypertension in this resistant animal preceded that in its mate from the strain highly sensitive to hypertension. In the latter, both the level of hypertension and mortality were significantly less than in its control. It seems likely that the hypertension observed is the resistant parabiont was initiated in its partner from the sensitive strain. This modification in blood pressures was not observed in the absence of a high NaCl diet. Parabiosis between animals from the same strain did not alter their response. Thus, as in earlier experiences (1-4) the interaction of a nongenetic factor (NaCl) with the appropriate genetic substrate appeared to be necessary for the development of hypertension. The findings are interpreted as evidence that a transmittable humoral influence plays an important role in the pathogenesis of rat hypertension. The presence of this agent is genetically determined but, under the conditions of these experiments, it took the added stimulus of dietary NaCl to demonstrate its existence.


Asunto(s)
Líquidos Corporales , Hipertensión/inducido químicamente , Parabiosis , Cloruro de Sodio , Animales , Determinación de la Presión Sanguínea , Dieta , Genética , Hipertensión/metabolismo , Ratas
9.
J Exp Med ; 129(4): 663-78, 1969 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-5766945

RESUMEN

In adrenalectomized, genetically hypertension-prone rats, a high degree of correlation was found between evidence of functioning adrenal tissue and the development of salt hypertension. There is considerable evidence that some rats have the capacity to regenerate functioning adrenal cortical tissue from accessory glands and microscopic rests, sometimes in remote locations. Therefore, the criteria for continued absence of adrenal function after surgical adrenalectomy are critical. In this study we used three tests to validate the presence, or absence, of adrenal function: (a) a biochemical test, the quantitative, serial measurement of plasma glucocorticoids in individual rats; (b) a physiological test, the ability to survive a virtually sodium-free diet; and (c) the anatomical search for histological evidence of adrenal cortical tissue. Among those animals that developed hypertension after adrenalectomy, the correlation between plasma steroid concentration and blood pressure was statistically significant. We suspect that this correlation exists only during the period when cortical tissue is regenerating; it does not exist among intact animals with and without hypertension induced by salt. It was concluded that some adrenocortical function is necessary for salt hypertension to develop. The evidence was insufficient to settle the question whether the action of corticosteroids is causative, or whether they play a supporting, although necessary, role for an extraadrenal hypertensinogenic factor to become manifest.


Asunto(s)
Glándulas Suprarrenales/fisiología , Presión Sanguínea , Hipertensión/etiología , Cloruro de Sodio , Adrenalectomía , Animales , Dieta , Ratas
10.
J Exp Med ; 142(3): 748-59, 1975 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-1165474

RESUMEN

In a genetically hypertension-prone (S) strain of rats it was observed previously that males generally developed hypertension more rapidly on a high salt diet than did females although final pressure ultimately were similar in both sexes. A genetic study had shown that there was no sex-linkage involved in setting blood pressure levels, so it was thought that the gonads might be involved. In the present work, castration of males had no effect on blood pressure but in the females it caused a rise in pressure that could not be distinguished from that in males, both on a high and low salt diet. Castration resulted in greater growth in females than in controls, whereas it had the opposite effect in males. It was speculated that these changes were due to influences on pituitary growth hormone with castration increasing the net output of growth hormone (or enhancing receptor sensitivity to it) in the female and the opposite in the male. From the work of others, there are some data compatible with such an interpretation. Experimentally, growth hormone will induce hypertension in rats. Therefore, it is conceivable that growth hormone is involved in the increment in hypertension observed in these castrate females. Because the effect on blood pressure was observed in castrate females on both high and low NaCl diets, it was considered unlikely that the blood pressure effect was simply due to increased NaCl intake in the food associated with greater growth. It was suggested that this rise in blood pressure with cessation of ovarian function might bear on the unsettled question of "menopausal" hypertension in women: in the genetically susceptible individual an increase in growth hormone associated with declining ovarian funtion in the menopause could provide the stimulus for the appearance of hypertension some years earlier than would otherwise have been the case.


Asunto(s)
Hormona del Crecimiento/fisiología , Hipertensión/etiología , Ovario/fisiología , Animales , Peso Corporal , Castración , Dieta/efectos adversos , Femenino , Hipertensión/genética , Hipertensión/fisiopatología , Masculino , Ratas , Factores Sexuales , Cloruro de Sodio/efectos adversos , Factores de Tiempo
11.
J Exp Med ; 132(5): 976-1000, 1970 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-5470512

RESUMEN

TWO STRAINS OF RAT HAVE BEEN DEVELOPED BY SELECTIVE BREEDING: one strain (R rats) is resistant to salt hypertension, the other strain (S rats) is highly susceptible. The inheritance of these traits has been explored in the first (F(1)) and second (F(2)) generation of crossbred rats and in backcrosses between parent and first filial (F(1) x R, F(1) x S) generations. Male F(1) rats had an average blood pressure close to the mid-parental (R and S) values, and the average of F(2) males was equivalent to that of F(1). Male offspring of F(1) with R, or F(1) with S also showed averages close to the respective mid-parental values. Female offspring showed deviations from this linear relationship, indicating a significant dominance in the female for the genes of normal blood pressure. A model of two autosomal, nonlinked diallelic loci, with a dominance deviation at one locus in the female, gave predictions with a reasonable agreement to the observed values. The same model also appeared compatible with human data if we assume a gene frequency of 0.13 for the hypertensinogenic allele on both loci. Random fluctuations in blood pressure, and incomplete homogeneity of parental strains permit several alternative models. The major conclusions are: that more than one locus is needed to explain the findings though as few as two loci may possibly suffice; the allelic effect seems additive in males, but there is a sex-determined influence on the expression in females; there is no consistent evidence for sex-linked inheritance. Furthermore, this model developed from the study of rats may provide a framework for analysis of human data.


Asunto(s)
Hipertensión/inducido químicamente , Hipertensión/genética , Cloruro de Sodio/administración & dosificación , Análisis de Varianza , Animales , Presión Sanguínea , Dieta , Femenino , Genotipo , Hibridación Genética , Masculino , Fenotipo , Ratas , Factores Sexuales
12.
J Exp Med ; 129(3): 507-22, 1969 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-4304137

RESUMEN

The effects of several renal manipulations including uninephrectomy, unilateral renal artery constriction, and a combination of these two (Goldblatt procedure) were studied in two strains of rats with opposite constitutional predispositions to experimental hypertension. The protective value of intact renal tissue to protect against hypertension was shown to be genetically determined. The Goldblatt procedure carried out on only one member of a parabiotic pair induced hypertension in this operated rat but significant hypertension developed in the intact partner only when the operated animal belonged to the strain predisposed to hypertension. It was speculated that there were qualitative differences in the pressor signals of the two strains of rats. In the strain genetically predisposed to hypertension there are at least two pressor principles: (a) one which is common to both strains, not transmittable via the parabiosis junction and presumably related to the renin-angiotensin system; and (b) a second which is specific for the hypertension-prone strain and can be transmitted through the parabiosis junction. This transmittable agent is probably identical with the factor that produces salt hypertension and is associated with the salt-excreting mechanism.


Asunto(s)
Hipertensión Renal/genética , Parabiosis , Angiotensina II/fisiología , Animales , Presión Sanguínea , Dieta , Femenino , Hipertensión Renal/etiología , Masculino , Nefrectomía , Ratas , Arteria Renal/cirugía , Renina/fisiología , Cloruro de Sodio , Especificidad de la Especie
13.
J Exp Med ; 130(6): 1353-65, 1969 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-5352784

RESUMEN

Rats from two strains with opposite constitutional predisposition to hypertension were joined in parabiosis and one partner was nephrectomized. The influence of genetic factors and of diet on the blood pressures of the two classes of parabionts, operated and intact, indicated that renoprival hypertension occurred with equal frequency in rats from both strains; that the development of renoprival hypertension depended on the influence from an intact S partner, or on a high salt intake, or on both. A nephrectomized S rat developing renoprival hypertension did not induce high blood pressure in its intact R partner. In this respect renoprival hypertension differs from salt and renal hypertension. The findings are interpreted to mean that the hypertensinogenic agent specific for S rats is produced by S kidneys.


Asunto(s)
Genética , Hipertensión Renal/genética , Riñón/fisiología , Parabiosis , Análisis de Varianza , Animales , Presión Sanguínea/efectos de los fármacos , Dieta Hiposódica , Métodos , Nefrectomía , Cloruro de Sodio/farmacología , Especificidad de la Especie
14.
Clin Exp Allergy ; 39(10): 1611-21, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19689460

RESUMEN

BACKGROUND: Food allergies are a public health issue of growing concern, with peanuts in particular being associated with severe reactions. The peanut allergen, Ara h 1, belongs to the cupin plant food allergen family, which, unlike other structural families, appears to be broken down rapidly following gastrointestinal digestion. OBJECTIVE: Using Ara h 1 as a model allergen, the ability of digested protein to sensitize has been investigated. METHODS: Ara h 1 was purified from whole roasted peanuts. Intact Ara h 1 was digested in an in vitro model, simulating the human gastrointestinal digestion process. Digestion products were analysed for peptide sizes and their ability to aggregate. Brown Norway (BN) rats, used as an animal model, were immunized with purified intact Ara h 1 or the gastrointestinal digestion products thereof. The sensitizing capacity was evaluated by analyses of specific antibody (IgG1, IgG2a and IgE) responses and ability to trigger mediator release of rat basophilic leukaemia (RBL)-2H3 cells. RESULTS: The present study showed that Ara h 1 was broken down, resulting in peptide fragments of sizes<2.0 kDa, of which approximately 50% was in aggregated complexes of Mr up to 20 kDa. Ara h 1 digesta were shown to have sensitizing capacity in BN rats, being capable of inducing specific IgG and IgE antibodies. The IgE response was functional, having the capacity to induce specific degranulation of RBL cells. CONCLUSION: From this study, it can be concluded that lability of a food allergen to gastrointestinal digestion does not necessarily abrogate its allergenic sensitizing potential.


Asunto(s)
Alérgenos/farmacología , Anticuerpos/inmunología , Especificidad de Anticuerpos/inmunología , Digestión/inmunología , Glicoproteínas/farmacología , Hipersensibilidad al Cacahuete/inmunología , Péptidos/farmacología , Proteínas de Plantas/farmacología , Alérgenos/química , Alérgenos/inmunología , Animales , Antígenos de Plantas , Línea Celular , Glicoproteínas/química , Glicoproteínas/inmunología , Humanos , Proteínas de la Membrana , Péptidos/química , Péptidos/inmunología , Proteínas de Plantas/química , Proteínas de Plantas/inmunología , Ratas
15.
Phys Rev Lett ; 103(22): 224801, 2009 Nov 27.
Artículo en Inglés | MEDLINE | ID: mdl-20366098

RESUMEN

In high intensity linacs emittance exchange driven by space charge coupling may lead to the well-known "equipartitioning" phenomenon if the stop band at sigma(parallel) = sigma(perpendicular) is crossed at sufficiently slow rate. This Letter is the first experimental evidence of this phenomenon in a high intensity linear accelerator, here the UNILAC at GSI. Measurements of emittances at the entrance and exit of one drift tube linac tank comprising 15 lattice cells are taken for a set of transverse and longitudinal tunes. The onset of exchange on the stop band of previously derived "stability charts" confirms theoretical predictions. The measured transverse emittance growth also compares well with results from the beam dynamics simulation codes DYNAMION and TRACEWIN.

16.
J Nutr Health Aging ; 22(4): 513-518, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29582891

RESUMEN

OBJECTIVES: To investigate the effect of a long-term fatty fish intervention on a pure cognitive mechanism important for self-regulation and mental health, i.e. working memory (WM), controlling for age and IQ. DESIGN: A randomized controlled trial. SETTING: A forensic facility. PARTICIPANTS: Eighty-four young to middle aged male forensic inpatients with psychiatric disorders. INTERVENTION: Consumption of farmed salmon or control meal (meat) three times a week during 23 weeks. MEASUREMENT: Performance on WM tasks, both accuracy and mean reaction time, were recorded pre and post intervention. RESULTS: Performance on a cognitive functioning tasks taxing WM seemed to be explained by age and IQ. CONCLUSION: Fatty fish consumption did not improve WM performance in a group of young to middle aged adults with mental health problems, as less impressionable factors such as aging and intelligence seemed to be the key components. The present study improves the knowledge concerning the interaction among nutrition, health and the aging process.


Asunto(s)
Cognición/fisiología , Peces/fisiología , Memoria a Corto Plazo/fisiología , Adulto , Animales , Humanos , Pacientes Internos , Masculino , Persona de Mediana Edad , Estado Nutricional , Adulto Joven
17.
J Clin Invest ; 92(5): 2540-5, 1993 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-8227367

RESUMEN

Protease nexin-2/amyloid beta protein precursor (PN-2/A beta PP) is an abundant, secreted platelet protein which is a potent inhibitor of coagulation Factor XIa. We examined other potential anticoagulant activities of PN-2/A beta PP. Purified Kunitz protease inhibitor domain of PN-2/A beta PP and PN-2/A beta PP itself were found to prolong the coagulation time of plasma and pure Factor IXa. The Kunitz protease inhibitor domain also inhibited the ability of Factor IXa to activate Factor X. PN-2/A beta PP inhibited Factor IXa with a Ki of 7.9 to 3.9 x 10(-11) M in the absence and presence of heparin, respectively. When the second-order rate constant of PN-2/A beta PP's inhibition of Factor IXa (2.7 x 10(8) M-1min-1) was compared to that of antithrombin III (3.8 x 10(6) M-1min-1), PN-2/A beta PP was at least a 71-fold more potent inhibitor of Factor IXa than antithrombin III. PN-2/A beta PP formed a complex with Factor IXa as detected by gel filtration and ELISA. The finding that PN-2/A beta PP is a potent inhibitor of Factor IXa could help to explain the spontaneous intracerebral hemorrhages seen in patients with hereditary cerebral hemorrhage with amyloidosis Dutch-type where there is an extensive accumulation of PN-2/A beta PP in their cerebral blood vessels.


Asunto(s)
Precursor de Proteína beta-Amiloide/farmacología , Anticoagulantes/farmacología , Factor IXa/antagonistas & inhibidores , Ensayo de Inmunoadsorción Enzimática/métodos , Fragmentos de Péptidos/farmacología , Inhibidores de Proteasas/farmacología , Proteínas Recombinantes/farmacología
18.
J Trace Elem Med Biol ; 44: 1-7, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-28965562

RESUMEN

BACKGROUND: Exposure to exogenous elements like arsenic (As) may influence thyroid enzymes, thyroid-stimulating hormone (TSH), and the two principal thyroid hormones, free thyroxine (FT4) and free triiodothyronine (FT3), but little is known about how this is related to organic arsenicals, the main form in seafood. AIM: To investigate whether a high intake of dietary arsenic from seafood can impact thyroid function and thyroid hormones by examining possible associations with changes in TSH, FT4, FT3 and the FT4:FT3-ratio in plasma. METHODS: Thirty-eight healthy subjects were randomized into four groups. During a 14-day semi-controlled dietary study, the subjects ingested daily portions of either 150g cod, salmon, blue mussels or potato (control). Plasma concentrations of total As, FT3, FT4, TSH and selenium (Se), and urinary concentrations of iodine were monitored. RESULTS: Plasma concentrations of TSH increased significantly in all seafood groups. The change in plasma As, with different coefficients for each seafood group, was the dominant factor in the optimal multiple regression model for change in TSH (R2=0.47). Plasma Se and iodine were negative and positive factors, respectively. There were also indications of changes in FT4, FT3 and the FT4:FT3 ratio consistent with a net inhibiting effect of As on FT4 to FT3 conversion. CONCLUSION: Ingestion of seafood rich in various organic As species was strongly associated with an increase of the TSH concentrations in plasma. Change in TSH was positively associated with total plasma As, but varied with the type of seafood ingested. These findings indicate that organic dietary As, apparently depending on chemical form, may influence thyroid hormones and function.


Asunto(s)
Arsénico/análisis , Voluntarios Sanos , Alimentos Marinos/análisis , Tirotropina/sangre , Femenino , Humanos , Yodo/orina , Masculino , Análisis Multivariante , Selenio/sangre , Tiroxina/sangre , Triyodotironina/sangre
19.
Open Orthop J ; 10: 404-11, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27583059

RESUMEN

BACKGROUND: The amount of patients referred with longstanding, non-arthritic hip pain is increasing, as are the treatment options. Left untreated hip dysplasia, acetabular retroversion and femoroacetabular impingement (FAI) may lead to osteoarthritis (OA). Finding the right treatment option for the right patient can be challenging in patients with non-arthritic hip pain. PURPOSE: The purpose of this study was to categorize the radiographic findings seen in patients with longstanding hip pain, suspect for an intraarticular pathology, and provide a treatment algorithm allocating a specific treatment option for each clinical condition. MATERIAL AND METHODS: A review of the literature was performed using Public Medline searches of MeSH terms combined with synonyms for femoroacetabular impingement, acetabular retroversion, periacetabular osteotomy and hip arthroscopy. RESULTS: Radiographic findings associated with acetabular retroversion described in the literature were the crossover sign, the posterior wall sign and the ischial spine sign, while Wiberg's lateral center-edge angle (CE-angle) together with Leqeusne's acetabular index indicate hip dysplasia. A Tönnis index >2 indicates osteoarthritis, however unsatisfying results are documented following joint preserving surgery with a Tönnis index >1. Furthermore, ischial spine sign in combination with the posterior wall sign indicates total acetabular retroversion prone to periacetabular osteotomy in contrast to focal retroversion prone to hip arthroscopy. These findings were used creating a treatment algorithm for intraarticular pathologies in patients with longstanding hip pain. CONCLUSION: Based on the radiographic findings, the algorithm presented in this study can be a helpful tool in the decision-making for the treatment of patients with non-arthritic hip pain, suspect for intraarticular pathologies.

20.
Arch Gen Psychiatry ; 45(11): 1001-4, 1988 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-3178410

RESUMEN

This study examines interjudge agreement on formulations of dynamic themes in psychotherapy, using a session-based method, namely, the Core Conflictual Relationship Theme. Agreement was assessed by two methods: one was based on themes that were tailor-made for each case, while the other was based on coding themes into a standard set of categories. To assess agreement on the tailor-made formulations, a paired-comparisons procedure was used. For a sample of 35 patients, the similarity ratings for matched cases were significantly higher than for purposely mismatched cases. Using the standard set of categories, agreement was also good; weighted kappa values ranged from .61 to .70. The results also demonstrate reliability for the location of the relationship episodes, which form the database for the Core Conflictual Relationship Theme. Our positive results suggest that this guided clinical method can be used reliably as a measure of relationship patterns in psychotherapy; our results provide the first moderate-sized sample demonstration of clinicians' agreement in formulating this complex concept.


Asunto(s)
Relaciones Interpersonales , Trastornos Mentales/psicología , Psicoterapia , Conducta Verbal , Actitud del Personal de Salud , Conflicto Psicológico , Humanos , Juicio , Trastornos Mentales/terapia , Evaluación de Procesos y Resultados en Atención de Salud , Psicometría , Transferencia Psicológica
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