Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 345
Filtrar
Más filtros

Intervalo de año de publicación
1.
J Intern Med ; 289(6): 851-860, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33340184

RESUMEN

BACKGROUND: To compare the predictive value of the circadian syndrome (CircS) and Metabolic syndrome (MetS) for cardiovascular disease. METHOD: We used the data of 9360 Chinese adults aged ≥40 years from the 2011 China Health and Retirement Longitudinal Study (CHARLS). Of the participants, 8253 people were followed in the 2015 survey. MetS was defined using the harmonized criteria. CircS was based on the components of the International Diabetes Federation (IDF) MetS plus short sleep and depression. The cut-off for CircS was set as ≥4. Multivariable logistic regression analysis was used to examine the associations. RESULTS: The prevalence of CircS and MetS was 39.0% and 44.7%. Both MetS and CircS were directly associated with prevalent CVD. The odds ratios for prevalent CVD comparing CircS with MetS, respectively, were 2.83 (95%CI 2.33-3.43) and 2.34 (1.93-2.83) in men, and 2.33 (1.98-2.73) and 1.79 (1.53-2.10) in women. Similar associations were found for incident CVD. The five-year incidence of CVD was 15.1% in CircS and 14.0% in MetS. The number of CircS components has a better predictive power for both prevalent and incident CVD than those of Mets components as indicated by the area under the ROC (AUC). AUC values for CVD in 2011 were higher for CircS than MetS in both men (0.659 (95%CI 0.634-0.684) vs 0.635 (95%CI 0.610-0.661)) and women (0.652 (95%CI 0.632-0.672) vs 0.619 (95%CI 0.599-0.640)). CONCLUSION: The circadian syndrome is a strong and better predictor for CVD than the metabolic syndrome in Chinese adults.


Asunto(s)
Enfermedades Cardiovasculares , Trastornos Cronobiológicos/epidemiología , Síndrome Metabólico , Adulto , Enfermedades Cardiovasculares/epidemiología , China/epidemiología , Femenino , Humanos , Estudios Longitudinales , Masculino , Síndrome Metabólico/epidemiología , Prevalencia , Factores de Riesgo
2.
Hum Reprod ; 36(10): 2753-2760, 2021 09 18.
Artículo en Inglés | MEDLINE | ID: mdl-34411251

RESUMEN

STUDY QUESTION: Is the functional ovarian reserve in transgender men affected by testosterone therapy? SUMMARY ANSWER: Serum anti-Müllerian Hormone (AMH) levels slightly decrease during testosterone treatment but remain within the normal range, suggesting preserved follicular ovarian reserve. WHAT IS KNOWN ALREADY: Few small studies have investigated the impact of gender-affirming treatment on reproduction in transgender men. Conflicting results were reached concerning ovarian morphology and AMH levels in this context. STUDY DESIGN, SIZE, DURATION: The study consisted of two arms. The first arm was a prospective pilot study, which enrolled 56 transgender men (median age 22.5 [interquartile range (IQR)-19-27.7] years), 27 of whom had polycystic ovary syndrome (PCOS), prior to the initiation of gender-affirming testosterone therapy. A structured assessment was conducted prior to, and at 3 and 12 months after treatment initiation. The second arm was a cross-sectional study that comprised 47 transgender men (median age 24 [IQR-20-31] years) who received testosterone for a median duration of 35 [IQR 13-62] months. The main outcome measures were serum AMH and antral follicle count (AFC) as indices of ovarian follicular reserve. PARTICIPANTS/MATERIALS, SETTING, METHODS: The study was conducted at a tertiary center for transgender health. Gender-affirming therapy was administered according to standard practice. AFC was determined by pelvic (abdominal or transvaginal) ultrasound and blood collection for measurements of AMH, testosterone, estradiol, LH and FSH was performed at the designated time-points. MAIN RESULTS AND THE ROLE OF CHANCE: Prospective arm for the entire group we observed a decrease of 0.71 ng/ml in AMH levels between baseline and 12 months (P = 0.01). When expressed in age-specific percentiles, AMH went from the 47.37th to the 40.25th percentile at 12 months (P < 0.001). In a sub-group analysis, a decline of 9.52 points in age-specific percentile was seen in subjects with PCOS (P < 0.001), while no changes were detected in the non-PCOS group. Testosterone treatment did not affect AFC over time in the entire cohort. In the sub-group analysis, a mean decrease of 5.0 follicles was detected between baseline and the 12 months assessment (P = 0.047) only in subjects with PCOS. In the cross-sectional study, AMH inversely correlated with age but not with treatment duration. Notably AMH did not deviate from the 50th age-specific percentile. Finally, four men fathered biological children after being under testosterone treatment for up to 12 years. LIMITATIONS, REASONS FOR CAUTION: The limited sample size of the pilot study should be kept in mind. An additional limitation is the lack of a control group in the prospective study, as each participant served as his own control. Also, roughly 40% of the ultrasound examinations were performed transabdominally, potentially affecting the accuracy of the AFC measurements.As study participants were quite young, our reassuring data may not apply to older transgender men, either because of an age-related decline in ovarian reserve or to possible long-term effects of testosterone therapy. Furthermore, the chances for fertility preservation may be more limited in subjects with PCOS. WIDER IMPLICATIONS OF THE FINDINGS: This is an additional contribution to the emerging evidence that prolonged testosterone treatment may not be a major obstacle to later fertility potential in transgender men desirous of having children. Larger confirmatory studies, and particularly more with reproductive outcome data, are needed for evidence-based fertility counseling prior to treatment initiation in these subjects. STUDY FUNDING/COMPETING INTEREST(S): This study received no funding. The authors have no competing interests to declare. TRIAL REGISTRATION NUMBER: N/A.


Asunto(s)
Reserva Ovárica , Personas Transgénero , Adulto , Hormona Antimülleriana/análisis , Preescolar , Estudios Transversales , Femenino , Humanos , Folículo Ovárico , Proyectos Piloto , Estudios Prospectivos , Testosterona/uso terapéutico , Adulto Joven
3.
J Intern Med ; 286(2): 181-191, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31081577

RESUMEN

The Metabolic Syndrome is a cluster of cardio-metabolic risk factors and comorbidities conveying high risk of both cardiovascular disease and type 2 diabetes. It is responsible for huge socio-economic costs with its resulting morbidity and mortality in most countries. The underlying aetiology of this clustering has been the subject of much debate. More recently, significant interest has focussed on the involvement of the circadian system, a major regulator of almost every aspect of human health and metabolism. The Circadian Syndrome has now been implicated in several chronic diseases including type 2 diabetes and cardiovascular disease. There is now increasing evidence connecting disturbances in circadian rhythm with not only the key components of the Metabolic Syndrome but also its main comorbidities including sleep disturbances, depression, steatohepatitis and cognitive dysfunction. Based on this, we now propose that circadian disruption may be an important underlying aetiological factor for the Metabolic Syndrome and we suggest that it be renamed the 'Circadian Syndrome'. With the increased recognition of the 'Circadian Syndrome', circadian medicine, through the timing of exercise, light exposure, food consumption, dispensing of medications and sleep, is likely to play a much greater role in the maintenance of both individual and population health in the future.


Asunto(s)
Ritmo Circadiano/fisiología , Síndrome Metabólico/fisiopatología , Trastornos del Conocimiento/fisiopatología , Depresión/fisiopatología , Hígado Graso/fisiopatología , Humanos , Estilo de Vida , Factores de Riesgo , Trastornos del Sueño del Ritmo Circadiano/fisiopatología
4.
Opt Express ; 25(14): 15868-15889, 2017 Jul 10.
Artículo en Inglés | MEDLINE | ID: mdl-28789099

RESUMEN

Ring resonators provide a means of filtering specific wavelengths from a waveguide, and optionally dropping the filtered wavelengths into a second waveguide. Both of these features are potentially useful for astronomical instruments. In this paper we focus on their use as notch filters to remove the signal from atmospheric OH emission lines from astronomical spectra. We derive the design requirements for ring resonators for OH suppression from theory and finite difference time domain simulations. We find that rings with small radii (< 10 µm) are required to provide an adequate free spectral range, leading to high index contrast materials such as Si and Si3N4. Critically coupled rings with high self-coupling coefficients should provide the necessary Q factors, suppression depth, and throughput for efficient OH suppression, but will require post-inscription tuning of the coupling and the resonant wavelengths. The overall prospects for the use of ring resonators in astronomical instruments is promising, provided efficient fibre-chip coupling can be achieved.

5.
J Fish Biol ; 89(5): 2282-2305, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27616166

RESUMEN

To deal with the difficulties of species differentiation and delimitation among the commercially important sardines from the genus Sardinella, an integrative approach was adopted, incorporating traditional taxonomy with four DNA markers (coI, cytb, 16s and nuclear rag2). Combining these methodologies has enabled a thorough re-description of three of the most common species of Sardinella of the Indo-west Pacific Ocean: white sardinella Sardinella albella, fringescale sardinella Sardinella fimbriata and the goldstripe sardinella Sardinella gibbosa, as well as a description of a new species, Gon's sardinella Sardinella goni, from the island of Boracay, Philippines. In addition, extensive widespread sampling of S. gibbosa reveals a significant genetic separation between the populations from the western Indian Ocean and the west Pacific Ocean, despite no supporting morphological differentiation. An updated morphological key of the species of Sardinella of the Indo-west Pacific Ocean is also provided in order to minimize future misidentifications within these economically important taxa. Finally, the genetic and morphological variabilities within and between the investigated species are used to discuss their biogeographical distribution and possible processes of speciation.


Asunto(s)
Peces/clasificación , Animales , Peces/anatomía & histología , Peces/genética , Variación Genética , Océano Índico , Islas , Océano Pacífico , Filipinas , Filogenia
6.
Exp Cell Res ; 319(10): 1586-93, 2013 Jun 10.
Artículo en Inglés | MEDLINE | ID: mdl-23578768

RESUMEN

Considerable evidence has been published demonstrating the importance of lipoxygenase enzymes for vascular smooth muscle cell (VSMC) growth. The current study sets out to determine whether or not 12-lipoxygenase (12LO) is also important for human placental VSMC survival. Both a pharmacological and two 12LO antisense knockdown approaches were applied. The 12LO inhibitor baicalien induced a 2-2.5-fold increase in cell death, which appeared to result from apoptosis, as indicated by DNA fragmentation, activation of procaspase 3 to caspase 3 and cytochrome C release from the mitochondria to the cytosol. This apoptosis could be prevented by treatment with the 12LO product, 12 hydroxyeicosatetraenoic acid (12HETE). Human platelet-type 12LO-antisense knockdown, by either plasmid transfection or adeno-associated virus (AAV) infection also induced substantial VSMC death over controls, which could also be prevented by treatment with 12HETE, but not 5HETE. Hence, biochemical 12LO inhibition or 12LO-antisense knockdown in VSMC can induce programmed cell death. These observations suggest a previously unrecognized association between human VSMC survivability and 12LO.


Asunto(s)
Araquidonato 12-Lipooxigenasa/metabolismo , Músculo Liso Vascular/citología , Miocitos del Músculo Liso/enzimología , Ácido 12-Hidroxi-5,8,10,14-Eicosatetraenoico/farmacología , Apoptosis , Araquidonato 12-Lipooxigenasa/genética , Transporte Biológico , Caspasa 3/metabolismo , Supervivencia Celular , Células Cultivadas , Citocromos c/metabolismo , ADN Complementario/genética , ADN Complementario/metabolismo , Dependovirus/genética , Dependovirus/metabolismo , Flavanonas/farmacología , Técnicas de Silenciamiento del Gen , Humanos , Inhibidores de la Lipooxigenasa/farmacología , Mitocondrias/metabolismo , Proteínas Mitocondriales/metabolismo , Músculo Liso Vascular/enzimología , Plásmidos/genética , Plásmidos/metabolismo , ARN Mensajero/genética , ARN Mensajero/metabolismo , Transfección
7.
J Fish Biol ; 85(2): 394-406, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24976033

RESUMEN

As part of a comprehensive study of trawl fishery catch off Israel (Ashdod) and Turkey (Iskenderun and Antalya) conducted during 2008-2011, the population explosion of Nemipterus randalli, first recorded in the Mediterranean Sea in the beginning of 2005, was documented. The smallest individuals occurred on deeper bottoms (120 m), significantly more individuals were collected at night, and juvenile recruitment to the commercial fishery occurred during November and December at 40 m depth.


Asunto(s)
Explotaciones Pesqueras , Perciformes , Animales , Israel , Mar Mediterráneo , Turquía
8.
Poult Sci ; 92(1): 218-24, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-23243251

RESUMEN

The whole carcass rinse (WCR) procedure is routinely used as a sampling method for determining the presence and number of quality-indicator organisms or pathogens associated with broiler chicken carcasses in processing facilities. Collection of a cumulative drip sample by placing collection vessels under the processing line could potentially capture a more representative sample of bacterial populations associated with an entire flock with less labor than individual bird rinses. The purpose of this study was to evaluate a cumulative drip sampling method for recovery of Campylobacter spp. and 3 types of quality indicator organisms from broiler carcasses. Cumulative drip and WCR samples were collected on 14 d from a commercial broiler processing facility over a 3-mo period. No statistically significant difference was demonstrated between the WCR and cumulative drip sampling methods in recovery of Campylobacter spp., total aerobes, Enterobacteriaceae, or Escherichia coli associated with the postevisceration samples (P > 0.01). Analysis of the pyrosequencing census data demonstrated high interbird variability and indicates cumulative sampling may be required to obtain fully representative sampling of a flock. For most bacterial taxa, the relative abundance in individual WCR was correlated with cumulative drip samples, but some taxa were undercounted or missed entirely by individual WCR. Consequently, individual carcass rinses may not be representative of the flock microbial community. The cumulative drip sampling technique may save labor and provide a more representative summary of process control in poultry processing facilities.


Asunto(s)
Campylobacter/aislamiento & purificación , Pollos/microbiología , Mataderos , Animales , Seguridad de Productos para el Consumidor , Microbiología de Alimentos , Microbiología del Agua
9.
Phys Rev Lett ; 109(3): 033603, 2012 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-22861848

RESUMEN

We report the experimental realization of an optical trap that localizes single Cs atoms ≃215 nm from the surface of a dielectric nanofiber. By operating at magic wavelengths for pairs of counterpropagating red- and blue-detuned trapping beams, differential scalar light shifts are eliminated, and vector shifts are suppressed by ≈250. We thereby measure an absorption linewidth Γ/2π=5.7±0.1 MHz for the Cs 6S(1/2), F=4→6P(3/2), F'=5 transition, where Γ0/2π=5.2 MHz in free space. An optical depth d≃66 is observed, corresponding to an optical depth per atom d1≃0.08. These advances provide an important capability for the implementation of functional quantum optical networks and precision atomic spectroscopy near dielectric surfaces.

10.
J Cell Biochem ; 112(1): 128-37, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21053364

RESUMEN

Estrogen deficiency as the sole factor underlying post-menopausal osteoporosis was challenged, in light of reports that both follicular stimulation hormone (FSH) receptor and FSHß knockout mice were resistant to bone loss, suggesting a detrimental role for FSH. We assessed whether lowering FSH levels by gonadotropin realizing (GnRH) analog decapeptyl in ovariectomized female rats (OVX) affects bone. Wistar-derived 25 days old OVX female rats were injected for 10 weeks with estradiol-17ß (E(2)), with GnRH analog (decapeptyl) or with both. FSH and luteinizing hormone (LH) serum levels were markedly increased in OVX rats, with smaller growth plates with disrupted architecture; heavy infiltration of bone marrow with numerous adipocytes and reduced thickness of cortical bone. In OVX rats treated with E(2), FSH, and LH levels were intermediate, the tibia was similar to that of intact rats, but there was reduced thickness of cortical bone. In decapeptyl treated OVX rats, FSH and LH levels were suppressed, the organization of growth plate and the trabecular bone were disrupted, and there were fewer proliferative and chondroblastic cells and a large adipocytes population in bone marrow, but an increased trabecular bone volume (TBV). In the E(2) + decapeptyl treatment, FSH and LH levels were suppressed, with partially restored growth plate architecture and improved TBV. In conclusion, E(2) deficiency is the dominant factor impairing bone loss in OVX and concomitant changes in FSH/LH levels achieved by decapeptyl have some modulating, though complex role in this setting. The role of high FSH levels in post-menopausal bone loss requires further investigation using combined sub-optimal doses of the different hormones.


Asunto(s)
Estrógenos/metabolismo , Hormona Folículo Estimulante/metabolismo , Osteoporosis/etiología , Animales , Huesos/efectos de los fármacos , Huesos/patología , Estradiol/farmacología , Femenino , Hormona Liberadora de Gonadotropina/metabolismo , Hormona Luteinizante/metabolismo , Ovariectomía , Ratas , Pamoato de Triptorelina/farmacología
11.
J Cell Biochem ; 112(2): 625-32, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21268084

RESUMEN

In cultured human osteoblasts estradiol-17ß (E2) modulated DNA synthesis, the specific activity of creatine kinase BB (CK), 12 and 15 lipoxygenase (LO) mRNA expression and formation of 12- and 15-hydroxyeicosatetraenoic acid (HETE). We now investigate the response of human bone cell line (SaOS2) to phytoestrogens and estrogen receptors (ER)-specific agonists and antagonists. Treatment of SaSO2 with E2, 2,3-bis (4-hydroxyphenyl)-propionitrile (DPN; ERß-specific agonist), 4,4',4″-[4-propyl-(1H)-pyrazol-1,3,5-triyl] tris-phenol (PPT; ERα-specific agonist), biochainin A (BA), daidzein (D), genistein (G) and raloxifene (Ral) showed increased DNA synthesis and CK. Ral inhibited completely all stimulations except DPN and to some extent D. The ERα-specific antagonist methyl-piperidino-pyrazole (MPP) and the ERß-specific antagonist 4-[2-phenyl-5,7-bis (tri-fluoro-methyl) pyrazolo [1,5-a]pyrimidin-3-yl] phenol (PTHPP) inhibited DNA synthesis, CK and reactive oxygen species (ROS) formation induced by estrogens according to their receptors affinity. The LO inhibitor baicaleine inhibited only E2, DPN and G's effects. E2 and Ral unlike all other compounds had no effect on ERα mRNA expression, while ERß mRNA expression was stimulated by all compounds. All compounds modulated the expression of 12LO and 15LO mRNA, except E2, PPT and Ral for 12LO, and 12- and 15-HETE productions and stimulated ROS formation which was inhibited by NADPH oxidase inhibitors diphenyleneiodonium chloride (DPI) and N-acetyl cysteine and the estrogen inhibitor ICI. DPI did not affect hormonal-induced DNA and CK. In conclusion, we provide evidence for the separation of mediation via ERα and ERß pathways in the effects of estrogenic compounds on osteoblasts, but the role of LO/HETE/ROS is unclear.


Asunto(s)
Huesos/efectos de los fármacos , Huesos/metabolismo , Metabolismo Energético/efectos de los fármacos , Receptor alfa de Estrógeno/agonistas , Receptor alfa de Estrógeno/antagonistas & inhibidores , Receptor beta de Estrógeno/agonistas , Receptor beta de Estrógeno/antagonistas & inhibidores , Huesos/citología , Línea Celular , Proliferación Celular/efectos de los fármacos , Cromatografía Líquida de Alta Presión , Estradiol/farmacología , Genisteína/farmacología , Humanos , Ácidos Hidroxieicosatetraenoicos/farmacología , Nitrilos/farmacología , Fitoestrógenos/farmacología , Pirazoles/farmacología , Clorhidrato de Raloxifeno/farmacología , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa
12.
Appl Environ Microbiol ; 77(24): 8605-14, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21984249

RESUMEN

The prevention and control of Campylobacter colonization of poultry flocks are important public health strategies for the control of human campylobacteriosis. A critical review of the literature on interventions to control Campylobacter in poultry on farms was undertaken using a systematic approach. Although the focus of the review was on aspects appropriate to the United Kingdom poultry industry, the research reviewed was gathered from worldwide literature. Multiple electronic databases were employed to search the literature, in any language, from 1980 to September 2008. A primary set of 4,316 references was identified and scanned, using specific agreed-upon criteria, to select relevant references related to biosecurity-based interventions. The final library comprised 173 references. Identification of the sources of Campylobacter in poultry flocks was required to inform the development of targeted interventions to disrupt transmission routes. The approach used generally involved risk factor-based surveys related to culture-positive or -negative flocks, usually combined with a structured questionnaire. In addition, some studies, either in combination or independently, undertook intervention trials. Many of these studies were compromised by poor design, sampling, and statistical analysis. The evidence for each potential source and route of transmission on the poultry farm was reviewed critically, and the options for intervention were considered. The review concluded that, in most instances, biosecurity on conventional broiler farms can be enhanced and this should contribute to the reduction of flock colonization. However, complementary, non-biosecurity-based approaches will also be required in the future to maximize the reduction of Campylobacter-positive flocks at the farm level.


Asunto(s)
Infecciones por Campylobacter/veterinaria , Portador Sano/veterinaria , Control de Infecciones/métodos , Aves de Corral/microbiología , Animales , Infecciones por Campylobacter/microbiología , Infecciones por Campylobacter/prevención & control , Infecciones por Campylobacter/transmisión , Portador Sano/microbiología , Portador Sano/prevención & control , Portador Sano/transmisión
13.
J Appl Microbiol ; 111(6): 1544-50, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21973216

RESUMEN

AIMS: Several bacteriocins (BCNs) that were identified from chicken commensal bacteria dramatically reduced Campylobacter colonization in poultry and are being directed toward on-farm control of this important foodborne human pathogen. A recent study has shown that BCN resistance in Campylobacter jejuni is very difficult to develop in vitro. In this study, in vivo development and stability of BCN resistance in Campylobacter was examined. METHODS AND RESULTS: Chickens infected with Camp. jejuni NCTC 11168 were treated with BCN E-760 at the dose of 5 mg kg(-1) body weight day(-1) via oral gavages for three consecutive days, which selected BCN-resistant (BCN(r)) mutants in the treated birds. However, all the in vivo-selected mutants only displayed low levels of resistance to BCN (MIC = 2-8 mg l(-1)) when compared to parent strain (MIC = 0.5 mg l(-1)). Inactivation of CmeABC efflux pump of the BCN(r) mutants led to increased susceptibility to BCN (8-32 fold MIC reduction). Three different BCN(r) Campylobacter strains (in vitro- or in vivo-derived) were examined for the stability of BCN resistance using both in vitro and in vivo systems. The low level of BCN resistance in these strains was not stable in vitro or in vivo in the absence of BCN selection pressure. CONCLUSIONS: Usage of BCN E-760 only selected low-level BCN(r) Camp. jejuni mutants in vivo, and the low-level BCN resistance was not stable in vitro and in vivo. SIGNIFICANCE AND IMPACT OF THE STUDY: The study provides helpful information for risk assessment of the future practical application of the anti-Campylobacter BCNs in animals.


Asunto(s)
Bacteriocinas/farmacología , Infecciones por Campylobacter/veterinaria , Campylobacter jejuni/efectos de los fármacos , Pollos/microbiología , Enfermedades de las Aves de Corral/microbiología , Animales , Transporte Biológico Activo , Infecciones por Campylobacter/microbiología , Campylobacter jejuni/genética , Campylobacter jejuni/crecimiento & desarrollo , Farmacorresistencia Bacteriana , Pruebas de Sensibilidad Microbiana
14.
Acute Med ; 10(3): 160-3, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21904715

RESUMEN

Balloon tamponade with compression tubes is used to stabilise life-threatening variceal bleeds when first-line endotherapy has failed and acts as a bridge to early definitive therapy. We present an overview of the use of compression tubes for variceal haemorrhage with a focus on insertion technique and aftercare.


Asunto(s)
Oclusión con Balón/métodos , Várices Esofágicas y Gástricas/complicaciones , Hemorragia Gastrointestinal/terapia , Oclusión con Balón/efectos adversos , Oclusión con Balón/instrumentación , Hemorragia Gastrointestinal/etiología , Humanos
15.
Endocrine ; 71(2): 357-364, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33398768

RESUMEN

Metabolic syndrome (MS) is comprised of a cluster of abnormalities in glucose, lipid, and vascular homeostasis, which is most commonly linked to abdominal obesity. MS heralds increased risk for development of diabetes and is linked to impairment in insulin signaling. Insulin-degrading enzyme (IDE) is one of the mechanisms through which insulin blood levels are maintained. It has been previously suggested that controlling IDE levels could provide yet another potential therapeutic approach in diabetes. Here we aim to investigate whether changes in serum IDE levels correlate with the severity of MS. Using a highly sensitive ELISA assay of active IDE in human serum, we found a strong correlation between circulating IDE levels and circulating levels of triglycerides, insulin, and c-peptide and an inverse correlation with HDL cholesterol (HDLc). Serum IDE levels were higher in MS subjects than in control subjects. Hence, circulating IDE may serve as a tool to identify subjects with abnormal insulin metabolism, possibly those with MS that are at risk to develop diabetes.


Asunto(s)
Insulisina , Síndrome Metabólico , Péptido C , Prueba de Tolerancia a la Glucosa , Humanos , Insulina
17.
J Cell Biochem ; 110(5): 1142-6, 2010 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-20564210

RESUMEN

Hormone replacement therapy (HRT) for post-menopausal symptoms in diabetes is associated with increased risk of coronary heart disease and stroke. Therefore, there is a need for new HRT with no adverse effects on diabetic post-menopausal women. We developed peptides as potential estrogen mimetic compounds and now we evaluated the effects of the most efficacious peptide; hexapeptide estrogen-mimetic peptide 1 (EMP-1) (VSWFFE) in comparison to estrogen (E(2)) and peptides with weak activity A44 (KAWFFE) and A45 (KRAFFE) on modulation of cell proliferation of vascular smooth muscle cells (VSMC) growing in normal (ng) or high glucose (hg) concentrations. In ng EMP-1-like E(2) inhibited cell proliferation at high concentration, and stimulated at low concentration. EMP-1 did not affect E(2) stimulation of DNA, but inhibited E(2) inhibition of cell proliferation at high concentration. All effects by the combination of EMP-1 and E(2) were abolished at hg. A44-stimulated cell proliferation at all concentrations and A45 had no effect. When A44 was co-incubated with E(2) at both concentrations, DNA synthesis was stimulated, but abolished at hg. A45 abolished E(2) stimulation and inhibition of cell proliferation at both glucose concentrations. All peptides tested except A45-stimulated CK-specific activity at both glucose concentrations. In hg A44 stimulation of DNA was unaffected as well as its inhibition by EMP-1. EMP-1 and A44 similar to E(2)-stimulated MAPK activity in ng or hg, suggesting similar mechanism of action. The results presented here suggest that EMP-1 provided it acts similarly in vivo can replace E(2) for treatment of post-menopausal women in hyperglycemia due to diabetes.


Asunto(s)
Proliferación Celular/efectos de los fármacos , Metabolismo Energético/efectos de los fármacos , Miocitos del Músculo Liso/efectos de los fármacos , Oligopéptidos/farmacología , Secuencia de Aminoácidos , Células Cultivadas , ADN/biosíntesis , Relación Dosis-Respuesta a Droga , Estradiol/química , Estradiol/farmacología , Estrógenos/química , Estrógenos/farmacología , Glucosa/farmacología , Humanos , Proteínas Quinasas Activadas por Mitógenos/metabolismo , Músculo Liso Vascular/citología , Músculo Liso Vascular/metabolismo , Miocitos del Músculo Liso/citología , Miocitos del Músculo Liso/metabolismo , Oligopéptidos/síntesis química
18.
Poult Sci ; 89(8): 1763-8, 2010 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-20634535

RESUMEN

The unacceptably high frequency of Campylobacter jejuni transmission from poultry to humans encourages scientists to consider and create alternative intervention strategies to control the pathogen in poultry production. Extremely high numbers of Campylobacter (often >10(8) cfu/g of poultry intestinal material) potentiate high numbers of the organism on the processed broiler carcass with increasing consequent human health risk. Many scientists believe interventions during poultry production portend the greatest opportunity for reducing risk of disease. Over the past 10 yr, we have focused our studies on nonantibiotic bacteriocin application to intervene during animal production and this is the subject of the current review. The application of therapeutic bacteriocin treatments to reduce poultry colonization diminishes Campylobacter from >10(8) cfu/g of cecal materials to nondetectable or very low levels in treated birds. Further, the review provides scientists with a useful starting point for the further development of industry-applicable interventions leading to reduced transmission of this agent in human disease.


Asunto(s)
Bacteriocinas/uso terapéutico , Campylobacter/efectos de los fármacos , Aves de Corral/microbiología , Animales , Pollos/microbiología , Reservorios de Enfermedades , Conservación de Alimentos/métodos
19.
Ann Burns Fire Disasters ; 33(2): 121-125, 2020 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-32913433

RESUMEN

The paper describes the presentation and management of patients presenting with crack cocaine induced upper airway injury. The study involved a retrospective clinical series of six patients with crack cocaine induced upper airway injury. Demographics, symptoms, physical exam, flexible laryngoscopy findings, treatment and intervention were recorded. All patients with crack cocaine induced thermal injury presented with mouth or throat pain plus at least one other laryngeal symptom, such as globus sensation, dysphagia or throat tightness. On physical exam, the supraglottis was the most common subsite of endolaryngeal injury. The only statistically significant finding was the number of subsites on initial physical exam and flexible laryngoscopy and need for airway intervention (p = 0.001). Airway intervention was required in one patient, while the remaining patients were closely observed until resolution of symptoms. Upper airway injury should be suspected in patients who present with pain and laryngeal symptoms after smoking crack cocaine.


Nous décrivons la clinique et la prise en charge des patients souffrant de lésions respiratoires supérieures liées à l'usage de Crack, en nous basant sur une série rétrospective de 6 cas. Nous avons colligé la démographie, les signes et symptômes, les données cliniques et endoscopiques ainsi que le traitement. Tous souffraient de douleur bucco- pharyngées et au moins d'un signe laryngé parmi sensation de gonflement, dysphagie ou sensation d'étouffement. Á l'examen, la zone supra- glottique était la plus communément atteinte. Le nombre de zones atteintes corrélait positivement (p = 0,001) à la nécessité d'une intervention sur les voies aériennes, qui n'a cependant été nécessaire que pour 1 patient, les autres ayant été simplement surveillés jusqu'à disparition des symptômes. Une atteinte des voies aériennes supérieures doit être soupçonnée devant un patient se présentant avec des douleurs et des signes laryngés après avoir fumé du crack.

20.
Eur J Surg Oncol ; 45(9): 1660-1667, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31014988

RESUMEN

BACKGROUND: Primary hepatobiliary cancer incidence in the UK is rising and survival rates are low. Surgery is the main curative option for these cancers, but multimodality therapies are expanding. The aim of our original study was to determine trends in survival, over an 8-year period, of patients treated for primary hepatobiliary cancers at our tertiary referral Centre. METHOD: Patients treated for the most common types of primary hepatobiliary cancers, namely Hepatocellular carcinoma (HCC), Cholangiocarcinoma and Gallbladder cancer between January 2009 and December 2016 were retrospectively analysed from a prospective database linked to UK Hospital Episode Statistics data. RESULTS: A total of 1536 patients with primary hepatobiliary cancers were assessed and treatment plans formulated at our supra-regional specialist Hepatobiliary MDT. The primary hepatobiliary cancers treated were HCC (n = 836), Cholangiocarcinoma (n = 516), and Gallbladder cancer (n = 184). Survival for all the 3 cancers was significantly better with curative treatment. Overall median survival times were 350, 180, and 150 days respectively for HCC, Cholangiocarcinoma and Gallbladder cancer. Excluding best supportive care patients, the respective survival figures were 900, 600, and 400 days. Survival for HCC patients improved over time and was significantly increased in the final 3 years of the study (p ≤ 0.011 for all). Cholangiocarcinoma and Gallbladder cancer survivals were poor and did not change significantly over time. CONCLUSION: HCC outcome has improved in association with expanded multimodal therapies. Survivals for cholangiocarcinoma and gallbladder cancer remain poor in parallel with limited expansion of multimodal therapies highlighting an unmet therapeutic need for biliary tract cancers.


Asunto(s)
Neoplasias del Sistema Biliar/mortalidad , Neoplasias del Sistema Biliar/terapia , Carcinoma Hepatocelular/mortalidad , Carcinoma Hepatocelular/terapia , Neoplasias Hepáticas/mortalidad , Neoplasias Hepáticas/terapia , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Terapia Combinada , Femenino , Humanos , Masculino , Persona de Mediana Edad , Sistema de Registros , Estudios Retrospectivos , Tasa de Supervivencia , Reino Unido
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA