RESUMEN
Several population viability models were constructed to aid recovery in endangered Scaphirhynchus albus, but these models are dependent upon accurate and precise input parameters that are not provided with standard catch per unit effort (CPUE) indices. Nine years of sampling efforts, under the robust design framework, provided 1223 unique captures with an 18·3% recapture rate. The annual population estimates varied from 4·0-7·3 fish rkm-1 for wild and 8·4-18·4 fish rkm-1 for hatchery-reared S. albus. The relationship between abundance (N) and annual trot-line CPUE indices (x = 70.726y + 2·533, R2 = 0·91, P < 0·001) was used to predict an abundance of 13 616 ± 7142 s.e. S. albus in the lower Missouri River. The use of small-scale intensive sampling to develop a relationship with relative abundance indices reported here, may provide a framework for other fisheries management applications where large-scale intensive sampling is not feasible, but catch data are available.
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Peces/fisiología , Ríos , Animales , Conservación de los Recursos Naturales/métodos , Explotaciones Pesqueras , Missouri , Densidad de PoblaciónRESUMEN
AIM: To examine the role of placental protein tyrosine nitration and p38-Mitogen-Activated Protein Kinase α (p38-MAPKα), Extra Cellular-Signal Regulated Kinase (ERK) and c-Jun NH2-Terminal Kinase (JNK) activity, in the pathogenesis of type 1 diabetic pre-eclampsia, and the putative modulation of these indices by maternal vitamin C and E supplementation. METHODS: Placental samples were obtained from a sub-cohort of the DAPIT trial: a randomised placebo-controlled trial of antioxidant supplementation to reduce pre-eclampsia in type 1 diabetic pregnancy. Placenta from placebo-treated: normotensive (NT) [n=17], gestational hypertension (GH) [n=7] and pre-eclampsia (PE) [n=6] and vitamin-treated: NT (n=20), GH (n=4) and PE (n=3) was analysed. Protein tyrosine nitration was assessed by immunohistochemistry in paraffin-embedded tissue. Catalytic activities of placental p38-MAPKα, ERK and JNK were measured by enzyme-linked immunosorbent assay (ELISA). RESULTS: Nitrotyrosine immunostaining was present in placebo-treated NT, GH and PE placentae, with no significant difference observed between the groups. There was a non-significant trend towards decreased p38-MAPKα activity in PE vs NT control placentae. ERK and JNK were similar among the three outcome placebo groups and vitamin supplementation did not significantly alter their activity. CONCLUSION: Nitrotyrosine immunopositivity in normotensive diabetic placentae indicates some degree of tyrosine nitration in uncomplicated diabetic pregnancy, possibly due to inherent oxidative stress and peroxynitrite production. Our results suggest that p38-MAPKα, ERK and JNK are not directly involved in the pathogenesis of type 1 diabetic pre-eclampsia and are not modulated by vitamin-supplementation.
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Antioxidantes/farmacología , Diabetes Mellitus Tipo 1/complicaciones , Quinasas MAP Reguladas por Señal Extracelular/metabolismo , Nitratos/metabolismo , Placenta/metabolismo , Preeclampsia/metabolismo , Proteínas Gestacionales/metabolismo , Vitaminas/farmacología , Adulto , Antioxidantes/uso terapéutico , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Diabetes Mellitus Tipo 1/metabolismo , Suplementos Dietéticos , Femenino , Humanos , Placebos , Preeclampsia/tratamiento farmacológico , Embarazo , Embarazo en Diabéticas/tratamiento farmacológico , Embarazo en Diabéticas/metabolismo , Procesamiento Proteico-Postraduccional , Tirosina/metabolismo , Vitaminas/uso terapéuticoRESUMEN
AIMS: To identify the characteristics of optimistic parents of children with cancer. To examine the relationship between optimism, anxiety, depression, life satisfaction, coping and subjective health perception in parents of children with cancer and parents of healthy children. METHODS: One hundred parents of children with cancer were recruited during attendance at Oncology Out-patient Clinics at a UK Regional Cancer Centre. A comparison group of 117 parents of healthy children was also recruited. All parents completed a questionnaire, providing demographic and medical information relating to the child, dispositional optimism, psychological distress, life satisfaction, coping and subjective health perception. RESULTS: Parents of children with cancer had higher levels of anxiety, depression, optimism, satisfaction with life and subjective health perception than the comparison group. Optimism was significantly correlated with satisfaction with life, subjective health perception, anxiety and depression in both groups. CONCLUSION: The findings highlight the importance of optimism in relationship to psychological distress in parents of children with cancer. Interventions targeting parents' optimism are recommended as a potential source of coping with adversity within this population.
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Ansiedad/psicología , Actitud Frente a la Salud , Cultura , Depresión/psicología , Neoplasias/psicología , Padres/psicología , Adaptación Psicológica , Adolescente , Adulto , Ansiedad/diagnóstico , Neoplasias Encefálicas/psicología , Neoplasias Encefálicas/terapia , Niño , Preescolar , Depresión/diagnóstico , Relaciones Familiares , Femenino , Humanos , Lactante , Leucemia Mieloide Aguda/psicología , Leucemia Mieloide Aguda/terapia , Masculino , Persona de Mediana Edad , Neoplasias/terapia , Satisfacción Personal , Inventario de Personalidad , Leucemia-Linfoma Linfoblástico de Células Precursoras/psicología , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Calidad de Vida/psicología , Apoyo Social , Encuestas y Cuestionarios , Reino UnidoRESUMEN
The aim of the study was to evaluate the impact of the Training and Support Programme among parents of children with ataxia. A total of 39 parents expressed an interest in the TSP, 27 (mean age 41; range 25-58) returned baseline questionnaires and completed the study. Twenty-four children (mean age 12.5 years, SD=12.4) received the TSP. Data were collected by self-administered questionnaires mailed to parents immediately before attending the TSP and at 4-month follow-up. Interviews were conducted with 10 parents immediately following TSP completion. Comparisons over time revealed significant decreases in parental anxious mood (p=.011), depressed mood (p=.046) and perceived stress (p=.020) and significant improvements in generalized self-efficacy (p=.010), satisfaction with life (p=.045) and parental health status (p=.020). Parents reported improvements in children's mobility, "jumping legs", sleep patterns, energy and activity levels, relaxation, and happiness (e.g., more smiles). Parents felt closer to their children and one parent had become "more accepting" of their child's ataxia. Results indicate that the TSP may enhance the psychosocial well-being of parents of children with ataxia although a randomized controlled trial would be necessary to determine whether the changes reported here are in fact due to attending the TSP.
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Educación , Ataxia de Friedreich/psicología , Masaje/educación , Apoyo Social , Adaptación Psicológica , Adolescente , Adulto , Ansiedad/diagnóstico , Ansiedad/psicología , Niño , Preescolar , Depresión/diagnóstico , Depresión/psicología , Femenino , Estudios de Seguimiento , Ataxia de Friedreich/terapia , Humanos , Lactante , Masculino , Masaje/psicología , Persona de Mediana Edad , Relaciones Padres-Hijo , Proyectos Piloto , Calidad de Vida/psicología , Autoeficacia , Rol del Enfermo , Encuestas y Cuestionarios , Reino UnidoRESUMEN
AIMS/HYPOTHESIS: Abnormalities of glucose and fatty acid metabolism in diabetes are believed to contribute to the development of oxidative stress and the long term vascular complications of the disease; therefore the interactions of glucose and long chain fatty acids on free radical damage and endogenous antioxidant defences were investigated in vascular smooth muscle cells. METHODS: Porcine vascular smooth muscle cells were cultured in 5 mmol/l or 25 mmol/l glucose for 10 days. Fatty acids, stearic acid (18:0), oleic acid (18:1), linoleic acid (18:2) and alpha-linolenic acid (18:3) were added with defatted bovine serum albumin as a carrier for the final three days. RESULTS: Glucose (25 mmol/l) alone caused oxidative stress in the cells as evidenced by free radical-mediated damage to DNA, lipids, and proteins. The addition of fatty acids (0.2 mmol/l) altered the profile of free radical damage; the response was J-shaped with respect to the degree of unsaturation of each acid, and oleic acid was associated with least damage. At a lower concentration alpha-linolenic acid (0.01 mmol/l) was markedly different in that, when added to 25 mmol/l glucose it resulted in a decrease in free radical damage to DNA, lipids and proteins. This was accompanied by a marked increase in antioxidant and glutathione concentrations as well as by increased gene expression is of gamma-glutamylcysteine synthetase, the rate-limiting enzyme in glutathione synthesis. CONCLUSIONS/INTERPRETATION: The results clearly show that glucose and fatty acids interact in the production of oxidative stress in vascular smooth muscle cells.
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Antioxidantes/metabolismo , Ácidos Grasos/farmacología , Radicales Libres/metabolismo , Glucosa/farmacología , Músculo Liso Vascular/metabolismo , Miocitos del Músculo Liso/metabolismo , Animales , Catalasa/genética , Catalasa/metabolismo , Células Cultivadas , Fragmentación del ADN/efectos de los fármacos , Ácidos Grasos/metabolismo , Expresión Génica/efectos de los fármacos , Glutamato-Cisteína Ligasa/genética , Glutamato-Cisteína Ligasa/metabolismo , Glutatión/metabolismo , Glutatión Peroxidasa/metabolismo , Glutatión Reductasa/metabolismo , Malondialdehído/metabolismo , Músculo Liso Vascular/efectos de los fármacos , Músculo Liso Vascular/patología , Miocitos del Músculo Liso/efectos de los fármacos , Miocitos del Músculo Liso/patología , Oxidación-Reducción/efectos de los fármacos , Proteínas/metabolismo , Superóxido Dismutasa/metabolismo , PorcinosRESUMEN
Toxicity, biodistribution and persistence of candidate HIV vaccines pTHr.HIVA, a recombinant DNA, and MVA.HIVA, a recombinant modified vaccinia virus Ankara, were determined in the Balb/c mouse. The mice were injected with either two doses of intramuscular pTHr.HIVA DNA (50 microg each, separated by an interval of 14 days), two doses of intradermal MVA.HIVA (10(6) plaque-forming units each, separated by an interval of 14 days), or a combination of the two vaccines, each given in two doses, in a prime-boost regimen. The study showed no significant toxic effects, either local or systemic, under any of these employed dosing regimens. With the exception of the sites of delivery, the vaccine-derived HIVA DNA sequences were undetectable 5 weeks after the last dosing. Thus, both the vaccines alone and in a combination were considered safe and suitable for the use in phase I trials in humans.
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Vacunas contra el SIDA/toxicidad , VIH-1/inmunología , Vacunas de ADN/toxicidad , Vacunas contra el SIDA/administración & dosificación , Vacunas contra el SIDA/inmunología , Animales , Femenino , VIH-1/clasificación , Kenia , Masculino , Ratones , Ratones Endogámicos BALB C , Reacción en Cadena de la Polimerasa , Vacunas de ADN/administración & dosificación , Vacunas de ADN/inmunología , Virus Vaccinia/genética , Virus Vaccinia/inmunologíaRESUMEN
Hyperglycemia-induced oxidative stress may play a key role in the pathogenesis of diabetic vascular disease. The purpose of this study was to determine the effects of glucose on levels of glutathione (a major intracellular antioxidant), the expression of gamma-glutamylcysteine synthetase (the rate-limiting enzyme in glutathione de novo synthesis), and DNA damage in human vascular smooth muscle cells in vitro. High glucose conditions and buthionine sulphoximine, an inhibitor of gamma-glutamylcysteine synthetase, reduced intracellular glutathione levels in vascular smooth muscle cells. This reduction was accompanied by a decrease in the mRNA expression of both subunits of gamma-glutamylcysteine synthetase as well as an increase in DNA damage. In high glucose conditions, incubation of the vascular smooth muscle cells with alpha-lipoic acid and L-cystine restored glutathione levels. We suggest that the decrease in GSH levels seen in high glucose conditions is mediated by the availability of cysteine (rate-limiting substrate in de novo glutathione synthesis) and the gene expression of the gamma-glutamylcysteine synthetase enzyme. Glutathione depletion is associated with an increase in DNA damage, which can be reduced when glutathione levels are restored.
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Daño del ADN/efectos de los fármacos , Glucosa/farmacología , Glutamato-Cisteína Ligasa/metabolismo , Glutatión/metabolismo , Músculo Liso Vascular/metabolismo , Aorta/citología , Butionina Sulfoximina/farmacología , Células Cultivadas , Cisteína/farmacología , Glutamato-Cisteína Ligasa/genética , Humanos , Músculo Liso Vascular/citología , Músculo Liso Vascular/efectos de los fármacos , ARN Mensajero/efectos de los fármacos , ARN Mensajero/metabolismo , Ácido Tióctico/farmacologíaRESUMEN
OBJECTIVE: The purpose of this study was to validate the use of the leg-to-leg bioelectrical impedance analysis (BIA) system in assessing change in body composition over 32 weeks in overweight and obese women participating in a community weight management program. DESIGN: Intervention, with subjects prescribed an energy-restriction diet and exercise program for 32 weeks and body composition measured pre-study and after 12 and 32 weeks. SUBJECTS AND SETTING: Overweight and obese premenopausal women (n=201) with no overt disease were recruited at six sites into community-based weight loss programs. One hundred and twenty-four women completed all aspects of the study. INTERVENTION: Energy intake was set at 0.8 x resting metabolic rate (RMR) for weeks 1 through 12, 1.0 x RMR for weeks 13 through 20 and 1.2 x RMR for weeks 21 through 32. Energy intake was based on a food exchange table, with the number of food exchanges adjusted to encourage a percent distribution of 55% carbohydrate, 30% fat and 15% protein. Subjects increased their daily walking distance by 3.2 km above pre-study levels. MEASURES OF OUTCOME: Underwater weighing, seven skinfolds, and leg-to-leg BIA tests were used to assess body composition. RESULTS: A 3 x 3 repeated measures ANOVA revealed no significant difference in detecting change in FFM at 12 and 32 weeks among underwater weighing, BIA and skinfold, (F(4,492)=1.73, p=0.141) (decrease in FFM of 1.0+/-3.3 kg, 1.7+/-2.2 kg, and 1.4+/-3.3 kg respectively, 32 weeks). CONCLUSIONS: The leg-to-leg BIA system provides a valid measure of body composition change in overweight premenopausal women during a 32-week community-based weight loss program.
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Tejido Adiposo/fisiología , Composición Corporal , Dieta Reductora , Impedancia Eléctrica , Obesidad/terapia , Adulto , Constitución Corporal , Estudios Transversales , Femenino , Humanos , Métodos , Persona de Mediana Edad , Obesidad/fisiopatología , Premenopausia , Reproducibilidad de los Resultados , Grosor de los Pliegues Cutáneos , CaminataRESUMEN
BACKGROUND: In a series of 229 patients infected with mycobacterial organisms, we noted a specific female phenotype that involves isolated infections of the middle lobe and lingula. METHODS: Thirteen patients were found to have infections of the middle lobe, lingula, or both. All of them were infected with Mycobacterium other then Mycobacterium tuberculosis, all were women, 12 of the 13 were slender, and most had variable combinations of skeletal abnormalities. All underwent resection of the middle lobe, lingula, or both. RESULTS: There were no operative deaths. Only 2 patients have had reactivation requiring additional antibiotic therapy. All patients have had a decreased number of pulmonary infections in the postoperative period. Anatomic findings at operation included a complete major fissure and at least a partially complete minor fissure with middle lobe resections or an elongated lingula. CONCLUSIONS: Mycobacterial infection of the middle lobe and lingula is primarily a disease of asthenic women and is often associated with skeletal abnormalities and complete fissures or an elongated lingula. We recommend that surgical intervention be performed early once the condition is identified.
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Infecciones por Mycobacterium no Tuberculosas/cirugía , Neumonectomía , Tuberculosis Pulmonar/cirugía , Anciano , Femenino , Humanos , Pulmón/diagnóstico por imagen , Persona de Mediana Edad , Infecciones por Mycobacterium no Tuberculosas/diagnóstico por imagen , Infección por Mycobacterium avium-intracellulare/diagnóstico por imagen , Infección por Mycobacterium avium-intracellulare/cirugía , Mycobacterium chelonae , Tomografía Computarizada por Rayos X , Tuberculosis Resistente a Múltiples Medicamentos/diagnóstico por imagen , Tuberculosis Resistente a Múltiples Medicamentos/cirugía , Tuberculosis Pulmonar/diagnóstico por imagenRESUMEN
The concept of immediate reconstruction of massive facial injury with rigid internal fixation and free-tissue transfer continues to evolve. This case is unique in that it is the first report of the following: (1) simultaneous combined maxillary and mandibular reconstruction with one vascularized bone graft and (2) immediate total maxillary reconstruction with vascularized fibular bone. The nasopharynx was closed with a tubed radial forearm flap. Reconstruction was staged over several days, with dissection/banking of flaps, grafts, recipient sites, and debridement as a preliminary stage.
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Traumatismos Mandibulares/cirugía , Traumatismos Maxilofaciales/cirugía , Colgajos Quirúrgicos/métodos , Heridas por Arma de Fuego/cirugía , Adulto , Trasplante Óseo/métodos , Humanos , Masculino , Mandíbula/cirugía , Maxilar/cirugíaRESUMEN
The role of nitric oxide (NO) radicals in killing the intracellular bacterial pathogen Legionella pneumophila (Lp) was examined in infected macrophages. Murine (RAW 264.7) and human (HL-60) cell monolayers were treated with 100 U/ml gamma-interferon (IFN) and cocultured with Lp in the presence and absence of NGMMA, a specific inhibitor of NO production. Viable Lp in IFN-treated RAW 264.7 cells decreased from 3.8 to 0.7 +/- 0.12 log CFU/ml after 24 h incubation, whereas in IFN+NGMMA-treated RAW 264.7 cells, viable Lp persisted at 2.2 +/- 0.2 log CFU/ml after 24 h. This increased survival corresponded with an inhibition of NO production (5.65 +/- 2.99 microM with NGMMA vs. 58.6 +/- 5.36 microM without NGMMA). Viable Lp were susceptible to killing, in a dose-dependent fashion, by 0, 2.5, and 5.0 mM sodium nitroprusside, a source of NO radicals. IFN-treated RAW 264.7 cells also had significantly decreased levels of intracellular iron (below assay limit) when compared to IFN+NGMMA-treated cells (72.0 +/- 0.78% of control). Normally permissive HL-60 cells treated with IFN were bacteriostatic rather than bactericidal, and NO production was not detected above background. Thus, NO radicals play a critical role in the bactericidal activity against Lp by IFN-treated RAW 264.7 cells, but the absence of NO production limits IFN-treated HL-60 cells to bacteriostasis.
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Arginina/análogos & derivados , Interferón gamma/farmacología , Legionella pneumophila/efectos de los fármacos , Activación de Macrófagos , Macrófagos/fisiología , Óxido Nítrico/metabolismo , Nitroprusiato/farmacología , Animales , Arginina/farmacología , Línea Celular , Humanos , Lactante , Hierro/metabolismo , Legionella pneumophila/crecimiento & desarrollo , Leucemia Promielocítica Aguda , Macrófagos/efectos de los fármacos , Ratones , Nitritos/metabolismo , Proteínas Recombinantes , Células Tumorales Cultivadas , omega-N-MetilargininaRESUMEN
For forty years following the passage of the Social Security Act, the United States experienced a liberalization in public policy toward the aged. In the late 1970's, the momentum of this liberalization began to ebb, and by the early 1980's, a shift toward greater restrictiveness was underway. Scholars and journalists often discuss this Reagan-era shift as if it were a unique policy initiative. A case can be made, however, that this is just a recent example of a recurrent pattern of social policy reform and reaction in the history of American politics. This point is illustrated by placing the current policy shift alongside a historically remote period.