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1.
Int Nurs Rev ; 68(1): 90-98, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33140478

RESUMEN

AIM: To analyse workplace health promotion interventions implemented exclusively for the female population. BACKGROUND: The differences in biological, psychological and social characteristics, as well as the type of work carried out by men and women, make it necessary for workplace health promotion to be specific for each group. This study focussed on working women. INTRODUCTION: Workplace health promotion interventions are centred on increasing the well-being and health of the employees. Occupational health nurses play an essential role in the implementation of these interventions. METHODS: A systematic review was carried out using the MEDLINE and Scopus databases, following the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines. RESULTS: Twelve articles met the inclusion criteria. Two lines of interventions were found: (1) promotion of breastfeeding (16.6%) and (2) promotion of physical activity and other healthy lifestyles (83.4%). The interventions studied underlined promoting breastfeeding, preventing a sedentary lifestyle, improving body composition, reducing cardiovascular risk, relieving premenstrual symptoms, time of breastfeeding after returning to work, and showing favourable results. DISCUSSION: The lack of studies on the subject and the medium-to-low quality of the articles included in the review have made it difficult to analyse workplace health promotion interventions, making it necessary to continue research in this area. CONCLUSION: There are very few occupational health promotion interventions targeting women (1.9%), and the majority of them focus on promoting physical activity. It is worrying that specific aspects of women's health are poorly addressed. IMPLICATIONS FOR NURSING PRACTICE AND HEALTH POLICY: The work of the occupational nurse essentially is to guarantee the health of women in the workplace, being the key figure in the research and development of gender-related policies in the field of public health.


Asunto(s)
Mujeres Trabajadoras , Lugar de Trabajo , Ejercicio Físico , Femenino , Promoción de la Salud , Estilo de Vida Saludable , Humanos , Masculino
2.
Neurologia ; 32(7): 446-454, 2017 Sep.
Artículo en Inglés, Español | MEDLINE | ID: mdl-27087473

RESUMEN

INTRODUCTION: Idiopathic toe walking, a differential diagnosis for neurological and orthopaedic disorders, has been associated with neurodevelopmental alterations. Neurodevelopmental assessment at early ages using specific tests may improve management and follow-up of these patients. The aim of our study is to analyse the neurodevelopmental characteristics of preschool idiopathic toe-walkers (ITW) by comparing them to a control group. METHOD: Our descriptive cross-sectional study compared possible risk factors, neurodevelopmental characteristics, and scores on the Child Neuropsychological Maturity Questionnaire (CUMANIN) between a group of 56 ITWs aged 3 to 6 and a control group including 40 children. RESULTS: The proportion of males was significantly higher in the ITW group (P=.008). The percentage of patients with a family history (P=.000) and biological risk factors during the perinatal period (P=.032) was also higher in this group. According to the parents' reports, motor coordination in ITWs was significantly poorer (59%; P=.009). ITWs scored significantly lower on CUMANIN subscales of psychomotricity (=0,001) and memory (P=.001), as well as in verbal development (P=.000), non-verbal development (P=.026), and overall development (P=.004). Foot preference was less marked in the ITW group (P=.047). CONCLUSIONS: The neurodevelopmental characteristics of our sample suggest that idiopathic toe walking is a marker of neurodevelopmental impairment. However, further studies are necessary to confirm these findings.


Asunto(s)
Marcha/fisiología , Dedos del Pie/fisiología , Caminata , Fenómenos Biomecánicos , Niño , Preescolar , Estudios Transversales , Femenino , Humanos , Masculino , Trastornos del Neurodesarrollo , Rango del Movimiento Articular
3.
Rev Esp Med Nucl ; 29(5): 254-7, 2010.
Artículo en Español | MEDLINE | ID: mdl-20398966

RESUMEN

Meningiomas-en-plaques (MEP) are characterized by an area of hyperostosis and constitute a diagnostic challenge, especially when associated with other underlying conditions, and may mimic other clinical conditions. We present a case of a large MEP, which was an incidental finding on a scintigraphy study of a patient with prostate adenocarcinoma, this finding being histologically confirmed. In regards to the case, we discuss the utility of the bone scintigraphy (BS) in relationship to other imaging modalities.


Asunto(s)
Adenocarcinoma/diagnóstico por imagen , Hallazgos Incidentales , Neoplasias Meníngeas/diagnóstico por imagen , Meningioma/diagnóstico por imagen , Neoplasias Primarias Múltiples/diagnóstico por imagen , Neoplasias de la Próstata/diagnóstico por imagen , Adenocarcinoma/secundario , Anciano , Traumatismos Craneocerebrales/diagnóstico por imagen , Diagnóstico Diferencial , Errores Diagnósticos , Exoftalmia/etiología , Cefalea/etiología , Humanos , Imagen por Resonancia Magnética , Masculino , Neoplasias Meníngeas/complicaciones , Neoplasias Meníngeas/diagnóstico , Neoplasias Meníngeas/patología , Meningioma/complicaciones , Meningioma/diagnóstico , Meningioma/patología , Osteítis Deformante/diagnóstico por imagen , Cintigrafía , Radiofármacos , Neoplasias Craneales/diagnóstico por imagen , Neoplasias Craneales/secundario , Medronato de Tecnecio Tc 99m , Tomografía Computarizada por Rayos X
4.
Rev Esp Med Nucl ; 29(6): 308-9, 2010.
Artículo en Español | MEDLINE | ID: mdl-20880609

RESUMEN

Allergic reactions to albumin nanocolloid are rare. Most of them are not potentially serious and in some cases treatment with antihistamines may be needed. We present a case of a patient with grade II right breast ductal carcinoma, in whom a lymphoscintigraphy was performed for sentinel lymph node detection. She had a type I hypersensitivity reaction following the administration of (99m)Tc-albumin nanocolloid, which abated spontaneously without subsequent sequels.


Asunto(s)
Neoplasias de la Mama/diagnóstico por imagen , Carcinoma Ductal de Mama/diagnóstico por imagen , Carcinoma Ductal de Mama/secundario , Hipersensibilidad Inmediata/etiología , Metástasis Linfática/diagnóstico por imagen , Radiofármacos/efectos adversos , Biopsia del Ganglio Linfático Centinela , Agregado de Albúmina Marcado con Tecnecio Tc 99m/efectos adversos , Anciano de 80 o más Años , Femenino , Humanos , Escisión del Ganglio Linfático , Cintigrafía
5.
Diabetologia ; 52(10): 2169-81, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19633828

RESUMEN

AIMS/HYPOTHESIS: TNF-alpha levels are increased in obesity and type 2 diabetes. The regulation of TNF-alpha converting enzyme (TACE) and its inhibitor, tissue inhibitor of metalloproteinase 3 (TIMP3), in human type 2 diabetes is unknown. METHODS: We examined TACE/TIMP3 regulation: (1) in lean and obese normal glucose tolerant (NGT) individuals and in type 2 diabetes patients; (2) following 6 h of lipid/saline infusion in NGT individuals; and (3) in cultured human myotubes from lean NGT individuals incubated with palmitate. Insulin sensitivity was assessed by a euglycaemic clamp and TACE/TIMP3 was evaluated by confocal microscopy, RT-PCR, western blotting and an in vitro activity assay. Circulating TNF-alpha, TNF-alpha-receptor 1 (TNFR1), TNF-alpha-receptor 2 (TNFR2), IL-6 receptor (IL-6R), vascular cell adhesion molecule (VCAM) and intercellular adhesion molecule (ICAM) levels were evaluated. RESULTS: TIMP3 levels were reduced and TACE enzymatic activity was increased in type 2 diabetes skeletal muscle. TACE expression, and TACE, TNF-alpha, TNFR1 and IL-6R levels were increased in type 2 diabetes, and positively correlated with insulin resistance. A 6 h lipid infusion into NGT individuals decreased insulin-stimulated glucose metabolism by 25% with increased TACE, decreased expression of the gene encoding TIMP3 and increased IL-6R release. Palmitate induced a dramatic reduction of TIMP3 and increased the TACE/TIMP3 ratio in cultured myotubes. CONCLUSIONS/INTERPRETATION: TACE activity was increased in skeletal muscle of obese type 2 diabetes patients and in lipid-induced insulin resistance. We propose that dysregulation of membrane proteolysis by TACE/TIMP3 of TNF-alpha and IL-6R is an important factor for the development of skeletal muscle insulin resistance in obese type 2 diabetes patients by a novel autocrine/paracrine mechanism.


Asunto(s)
Proteínas ADAM/metabolismo , Diabetes Mellitus Tipo 2/metabolismo , Regulación de la Expresión Génica , Resistencia a la Insulina/fisiología , Músculo Esquelético/metabolismo , Inhibidor Tisular de Metaloproteinasa-3/metabolismo , Proteínas ADAM/genética , Proteína ADAM17 , Adulto , Western Blotting , Diabetes Mellitus Tipo 2/genética , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Resistencia a la Insulina/genética , Masculino , Receptores de Interleucina-6/genética , Receptores de Interleucina-6/metabolismo , Inhibidor Tisular de Metaloproteinasa-3/genética
6.
Clin Pharmacol Ther ; 82(3): 275-81, 2007 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-17361126

RESUMEN

Peripheral edema, mild weight gain, and anemia are often observed in type II diabetic patients treated with thiazolidinediones (TZDs). Small decreases in hemoglobin (Hb) and hematocrit (Hct) appear to be a class effect of TZDs and are generally attributed to fluid retention, although experimental data are lacking. We analyzed 50 patients with type II diabetes mellitus undergoing either placebo or pioglitazone (PIO, 45 mg/day) for 16 weeks. Before and after therapy, we measured Hb/Hct and used (3)H(2)O and bioimpedance to quantitate total body water (TBW), extracellular water, and fat-free mass. The majority (89%) of the increment in body weight was accounted for by increased body fat. Hb and Hct fell significantly in the PIO group (-0.9+/-0.2 g/dl, -2.4+/-0.5%, both P<0.0001), without change in TBW. A decline in white blood cell (-0.8+/-0.1 x 10(3)/mm(3), P<0.0001) and platelet (-15+/-6 x 10(3)/mm(3), P<0.02) counts was seen after PIO. In conclusion, the small decreases in Hb/Hct observed after 16 weeks of PIO treatment cannot be explained by an increase in TBW. Other causes, such a mild marrow suppressive effect, should be explored.


Asunto(s)
Diabetes Mellitus Tipo 2/sangre , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Hematócrito , Hemoglobinas/metabolismo , Hipoglucemiantes/efectos adversos , Hipoglucemiantes/uso terapéutico , Tiazolidinedionas/efectos adversos , Tiazolidinedionas/uso terapéutico , Adulto , Recuento de Células Sanguíneas , Glucemia/metabolismo , Composición Corporal/efectos de los fármacos , Distribución de la Grasa Corporal , Agua Corporal/metabolismo , Peso Corporal/efectos de los fármacos , Estudios de Cohortes , Femenino , Hemoglobina Glucada/metabolismo , Hemodilución , Humanos , Masculino , Persona de Mediana Edad , Pioglitazona
7.
J Mol Biol ; 235(3): 881-97, 1994 Jan 21.
Artículo en Inglés | MEDLINE | ID: mdl-8289326

RESUMEN

The germinating asexual spores (conidia) of Neurospora crassa were employed to study steps in the accumulation of transcripts of groups of mitochondrial genes, including those for peptide subunits of cytochrome c oxidase (CO), ATPase (ATP), and apocytochrome b (COB). Physically clustered groups of genes were expressed as cohorts: transcripts of the ATP8-ATP6-mtATP9-CO2 genes were almost undetectable in the dormant spores, and they accumulated rapidly as a group immediately after spore activation. Transcripts of COB and the adjacent CO1 were abundant in the dormant spores, and the dormant and germinating spores contained size forms of the COB transcripts that were not evident in vegetative cells. Polyribosomes were prepared from mitochondrial lysates, and the polyribosomal RNA was probed to identify the mRNAs of specific genes; in several instances polycistronic mRNAs were present in the polyribosomes as were the smaller end-products of the inferred transcript processing pathways. The expression of the physically dispersed genes for subunit peptides of cytochrome c oxidase appears to be regulated to the level of translation; these transcripts are accumulated in the total mitochondrial RNA with sharply different kinetics, but they appeared in the polyribosomes uniformly, their appearance correlating with the uniform synthesis of the subunit peptides. Transcripts for a previously reported non-functional mitochondrial gene, homologous to the functional nuclear gene for ATPase subunit 9, were found in the germinating spores, but were not detected in vegetative cells. These mtATP9 transcripts were also present in the polyribosomes and were apparently translated into a protein in vivo whose synthesis was insensitive to cycloheximide and detectable with an anti-ATP9 subunit antibody. Transcripts for two nuclear genes for mitochondrially localized proteins, ATP9 and CO5, were accumulated in unison and especially rapidly during spore germination.


Asunto(s)
ADN Mitocondrial/genética , Genes Fúngicos , Neurospora crassa/genética , Secuencia de Bases , Mapeo Cromosómico , Cartilla de ADN/química , Regulación Fúngica de la Expresión Génica , Datos de Secuencia Molecular , Sondas de Oligonucleótidos/química , Operón , Regiones Promotoras Genéticas , ARN de Hongos/metabolismo , ARN Mensajero/metabolismo , Ribosomas/metabolismo , Esporas Fúngicas
8.
Plant Physiol ; 102(4): 1227-1235, 1993 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12231898

RESUMEN

The role of Ca2+ in cold-induced changes in protein phosphorylation, gene expression, and development of freezing tolerance has been studied in cell-suspension cultures of a freezing-tolerant cultivar of alfalfa (Medicago sativa spp. falcata cv Anik). Chemical treatments to block Ca2+ channels, antagonize calmodulin action, or inhibit protein kinases markedly inhibited the cellular capacity to develop cold-induced freezing tolerance but had little effect on cell viability. An analysis of phosphoprotein profile by two-dimensional polyacrylamide gel electrophoresis revealed that at low temperature the relative level of phosphorylation of several proteins increased, whereas that of several others decreased. When cold acclimation was carried out in the presence of N-(6-aminohexyl)-5-chloro-1-naphthalene-sulfonamide hydrochloride, an antagonist of calmodulin and Ca2+-dependent protein kinases, or the Ca2+ channel blocker La3+, the cold-induced changes in protein phosphorylation were strongly inhibited, cells lost their capacity to develop freezing tolerance, and accumulation of transcripts of cold acclimation-specific genes was substantially reduced. An inhibitor of protein kinases, 1-(5-isoquinolinesulfonyl)-2-methylpiperazine dihydrochloride, had less pronounced effects on the cold-induced protein phosphorylation and caused only a partial inhibition of the cold-induced development of freezing tolerance and accumulation of the transcripts. The level of phosphorylation of one protein, of about 15 kD, increased more than 10-fold at low temperature and showed a strong positive correlation with cold-induced freezing tolerance and gene expression even when the latter were altered with various chemical treatments. These results suggest that Ca2+ and protein phosphorylation, or perhaps a coupling of the two, play an important role during the acquisition of freezing tolerance during cold acclimation.

9.
FEBS Lett ; 410(2-3): 206-9, 1997 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-9237630

RESUMEN

Activities of prevalent protein phosphatases decreased by nearly 95% and those of individual protein kinases were differentially reduced at low temperature. Inhibition of phosphatase activity at temperatures below 12 degrees C resulted in marked hyperphosphorylation of a 58-kDa protein (PP58). The temperature threshold for hyperphosphorylation of PP58 coincided with the known threshold for cold-induced calcium influx. Since calcium influx is triggered by several environmental stresses, we propose that the observed direct effects of cold on the phosphorylation of specific proteins enable cells to couple a shared calcium signal to a cold-specific transduction pathway.


Asunto(s)
Frío , Medicago sativa/fisiología , Adenosina Trifosfato/metabolismo , Caseína Quinasas , Caseínas/metabolismo , Sistema Libre de Células , Histonas/metabolismo , Medicago sativa/enzimología , Medicago sativa/metabolismo , Fosfoproteínas Fosfatasas/metabolismo , Fosforilación , Extractos Vegetales/metabolismo , Proteínas de Plantas/metabolismo , Protamina Quinasa/metabolismo , Proteínas Quinasas/metabolismo
10.
Science ; 223(4633): 276-7, 1984 Jan 20.
Artículo en Inglés | MEDLINE | ID: mdl-17801592
11.
Science ; 151(3710): 597-8, 1966 Feb 04.
Artículo en Inglés | MEDLINE | ID: mdl-17809503
12.
Eur Cytokine Netw ; 6(3): 195-202, 1995.
Artículo en Inglés | MEDLINE | ID: mdl-8589277

RESUMEN

Cytotoxic T lymphocytes (CTL) specific against autologous human cervical cancer cells were generated in vitro from peripheral blood leukocytes (PBL) from four patients with non-keratinized epidermoid carcinoma. For this purpose, these patients' PBL were co-cultured for 28 days either with IL-2 or a mixture of IL-2, IFN-gamma and TNF-alpha in the presence of autologous tumour cells (ATC). Our results showed that these CTL were highly cytotoxic for ATC, weakly cytotoxic for heterologous cervical cancer tumour cells, and not cytotoxic for carcinoma cell lines, normal cervix cells nor autologous PBL. Proliferation and cytotoxicity against ATC were greater when the PBL were activated with the three cytokines. These CTL had a CD4:CD8 ratio of 1:1, were CD16- and CD45RO+ and their killing activity was inhibited by antibodies against CD3, CD8 and MHC-class I but not by antibodies against CD4, CD16 or HLA-class II. The possibility of generating specific CTL in long term cultures for cervical cancer therapy is also discussed.


Asunto(s)
Carcinoma de Células Escamosas/inmunología , Memoria Inmunológica/efectos de los fármacos , Interferón gamma/farmacología , Interleucina-2/farmacología , Activación de Linfocitos/efectos de los fármacos , Subgrupos Linfocitarios/efectos de los fármacos , Linfocitos T Citotóxicos/efectos de los fármacos , Factor de Necrosis Tumoral alfa/farmacología , Neoplasias del Cuello Uterino/inmunología , Anticuerpos Monoclonales/inmunología , Anticuerpos Monoclonales/farmacología , Autoinmunidad , Antígenos CD4/análisis , Antígenos CD8/análisis , Antígenos CD8/inmunología , Carcinoma de Células Escamosas/patología , Cuello del Útero/inmunología , Citotoxicidad Inmunológica , Femenino , Antígenos HLA/análisis , Antígenos HLA/inmunología , Antígenos HLA-D/análisis , Antígenos HLA-D/inmunología , Humanos , Neoplasias Laríngeas/patología , Antígenos Comunes de Leucocito/análisis , Leucocitos Mononucleares/inmunología , Prueba de Cultivo Mixto de Linfocitos , Subgrupos Linfocitarios/química , Muromonab-CD3/farmacología , Receptores de IgG/análisis , Receptores de IgG/inmunología , Proteínas Recombinantes , Linfocitos T Citotóxicos/química , Células Tumorales Cultivadas , Neoplasias del Cuello Uterino/patología
13.
Chem Biol Interact ; 108(3): 187-96, 1998 Jan 30.
Artículo en Inglés | MEDLINE | ID: mdl-9528689

RESUMEN

O-Hexyl, O-2,5-dichlorophenyl phosphoramidate (HDCP) is a chiral compound that induces delayed neuropathy in hens. This compound is hydrolyzed by a phosphotriesterase known as HDCPase in hen and rat plasma, liver and brain. We studied the stereospecificity of HDCPase in hen tissues and in human and rabbit plasma employing a chromatographic method for analysis and quantification of HDCP stereoisomers. Hen and human plasma HDCPases were not stereospecific. However, rabbit plasma showed a remarkable stereospecificity to S-(-)-HDCP. High levels of stereospecific HDCPase were found in the particulate fraction of hen liver, where S-(-)-HDCP is hydrolyzed faster than R-(+)-HDCP. However, in hen brain the stereospecificity was found in the soluble fraction, where R-(+)-HDCP is hydrolyzed faster than S-(-)-HDCP. It is concluded that liver particulate fraction must be the main tissue responsible for the HDCP stereospecific biotransformation in hens. In an oral administration, the steroisomer R-(+)-HDCP would survive after passing through the liver and would interact with acetylcholinesterase and neuropathy target esterase in the nervous system.


Asunto(s)
Encéfalo/enzimología , Esterasas/metabolismo , Hígado/enzimología , Animales , Arildialquilfosfatasa , Pollos , Inhibidores de la Colinesterasa/metabolismo , Esterasas/química , Femenino , Humanos , Hidrólisis , Compuestos Organofosforados/metabolismo , Plasma/enzimología , Conejos , Estereoisomerismo
14.
Chem Biol Interact ; 119-120: 541-50, 1999 May 14.
Artículo en Inglés | MEDLINE | ID: mdl-10421493

RESUMEN

Soluble extracts of chicken peripheral nerve contain detectable amounts of phenyl valerate esterase (PVase) activity (about 2000 nmol/min per g of fresh tissue). More than 95% of this activity is inhibited in assays where substrate has been added to a preincubated mixture of tissue with the non-neuropathic organophosphorus compound (OP) paraoxon (O,O'-diethyl p-nitrophenyl phosphate): residual activity includes soluble neuropathy target esterase (S-NTE) which, by definition, is considered resistant to long-term progressive (covalent) inhibition by paraoxon. However we have previously shown that paraoxon strongly interacts with S-NTE so interfering with its sensitivity to other inhibitors. We now show that, surprisingly, removal of paraoxon by ultrafiltration ('P' tissue) in order to avoid such an interference results in the reappearance of about 65% of total original soluble PVase activity which is inhibited in the presence of this OP. Although a purely reversible non-progressive inhibition might be suspected, kinetic analysis data show a time-progressive inhibition which suggests that such PVase(s) covalently bind paraoxon. Also a time-dependent recovery due to spontaneous reactivation of the PVase activity was observed after dilution of the inhibitor. Gel filtration chromatography of 'P' tissue in Sephacryl S-300 shows that the reactivated activity is associated with proteins of about 100-kDa mass which include S-NTE and an, as yet, unknown number of other PVases. The implications of these findings in the definition of NTE in a target tissue for the so-called organophosphorus-induced delayed polyneuropathy (OPIDP) are discussed.


Asunto(s)
Hidrolasas de Éster Carboxílico/antagonistas & inhibidores , Hidrolasas de Éster Carboxílico/metabolismo , Inhibidores de la Colinesterasa/farmacología , Inhibidores Enzimáticos/farmacología , Paraoxon/farmacología , Nervio Ciático/enzimología , Animales , Hidrolasas de Éster Carboxílico/aislamiento & purificación , Pollos , Inhibidores de la Colinesterasa/farmacocinética , Activación Enzimática , Inhibidores Enzimáticos/farmacocinética , Reactivadores Enzimáticos , Cinética , Paraoxon/farmacocinética , Solubilidad
15.
J Med Entomol ; 33(3): 449-57, 1996 May.
Artículo en Inglés | MEDLINE | ID: mdl-8667394

RESUMEN

A reverse transcriptase polymerase chain reaction (RT-PCR) assay was evaluated for the detection of eastern equine encephalomyelitis virus (EEEV). EEEV was detected by amplification of a 416-bp PCR product from within the E2 gene. Internal restriction endonuclease digestion and hybridizations to EEEV RNA demonstrated that the PCR product was amplified from EEEV. PCR amplifications from serial dilutions of an EEEV isolate identified by a neutralization test and titered by an infectious assay in cell culture indicated that this RT-PCR assay detected viral RNA at concentrations below 1 plaque forming unit(PFU) per reaction. The performance of the PCR assay in detection of EEEV was compared with an infectious assay detection procedure (IA/IFA) as part of the New Jersey 1993 vector surveillance program. During 1993, 7,007 field-collected Culiseta melanura (Coquillett) were assayed in 522 pools by both RT-PCR and IA/IFA. EEEV was detected in 95 pools by RT-PCR and 17 pools by IA/IFA; all IA/IFA positive pools were also positive by RT-PCR. During the 1993 field season, RT-PCR consistently detected virus at enzootic foci earlier that IA/IFA and in greater numbers of mosquito pools. The data indicated that viral RNA may be present earlier and in more mosquitoes than indicated by IA/IFA.


Asunto(s)
Culicidae/virología , Virus de la Encefalitis Equina del Este/aislamiento & purificación , Insectos Vectores/virología , Reacción en Cadena de la Polimerasa/métodos , Aedes/virología , Animales , Secuencia de Bases , Línea Celular , Cricetinae , Culex/virología , ADN Viral , Virus de la Encefalitis Equina del Este/genética , Estudios de Evaluación como Asunto , Femenino , Datos de Secuencia Molecular , ARN Viral/análisis , ADN Polimerasa Dirigida por ARN
16.
Adv Exp Med Biol ; 207: 25-35, 1986.
Artículo en Inglés | MEDLINE | ID: mdl-3548239

RESUMEN

In 1902, Boveri introduced the important concept that for the success of fertilization the gametes must activate one another. Based primarily on studies on the sea urchin and ascidian fertilization the suggestion is presented here that "activation" of the spermatozoon actually involves a switching off of its metabolic machinery as a result of its interaction with the sperm receptors of the egg envelopes and prior to its fusion with the egg. Concerning the activation of the egg, there is a fairly large body of old and new experimental evidence that activation per se does not require sperm incorporation. Indeed, the chain of reactions culminating in the activation of the egg is initiated upon attachment of the spermatozoon to the egg plasma membrane.


Asunto(s)
Fertilización , Interacciones Espermatozoide-Óvulo , Animales , Femenino , Masculino , Erizos de Mar/fisiología , Urocordados/fisiología
17.
Arch Mal Coeur Vaiss ; 92(8): 1001-4, 1999 Aug.
Artículo en Francés | MEDLINE | ID: mdl-10486654

RESUMEN

UNLABELLED: Although the renal receptor at which cicletanine acts is unknown, cicletanine was assumed to act like thiazide diuretics. Here we tested cicletanine and its natriuretic metabolite, cicletanine-sulfate, for inhibitory activity against the thiazide-sensitive NaCl cotransporter expressed in Xenopus oocytes. The renal thiazide-sensitive NaCl cotransporter was expressed in Xenopus laevis oocytes injected with rat cRNA TSCr (TSCr: thiazide-sensitive cotransporter from rat kidney) and both, racemic (+/-) cicletanine and its sulfoconjugated metabolite were tested for inhibitory activity against oocyte 22Na+ uptake catalyzed by this cotransporter. Polythiazide was used as reference thiazide. Polythiazide fully inhibited NaCl cotransporter function with IC50 approximately 1.2 x 10(-7) M. Conversely, neither cicletanine, nor cicletanine sulfate were able to inhibit such cotransporter, i.e.: a minimum concentration of 10(-4) M of cicletanine was necessary to induce a slight cotransporter inhibition (29.5 +/- 18.2%). Cicletanine sulfate was inactive, even at 10(-4) M. IN CONCLUSION: (i) the natriuretic metabolite of cicletanine (cicletanine sulfate) is unable to inhibit thiazide-sensitive NaCl cotransporter and (ii) inhibition of such cotransporter by cicletanine required concentrations equal or higher than 10(-4) M--concentrations much more higher than urinary therapeutic ones in humans (approximately 10(-6) M). These results clearly demonstrate that cicletanine does not act like thiazide diuretics.


Asunto(s)
Benzotiadiazinas , Proteínas Portadoras/efectos de los fármacos , Diuréticos/farmacología , Oocitos/efectos de los fármacos , Piridinas/farmacología , Receptores de Droga/efectos de los fármacos , Inhibidores de los Simportadores del Cloruro de Sodio/farmacología , Simportadores , Animales , Femenino , Simportadores del Cloruro de Sodio , Radioisótopos de Sodio , Xenopus laevis
19.
Neurología (Barc., Ed. impr.) ; 32(7): 446-454, sept. 2017. graf, tab
Artículo en Español | IBECS (España) | ID: ibc-166249

RESUMEN

Introducción: La marcha de puntillas idiopática, considerada un diagnóstico de exclusión de alteraciones neurológicas y ortopédicas, se ha relacionado con alteraciones en diversas áreas del desarrollo neuromadurativo. La evaluación del neurodesarrollo en edades tempranas mediante un test específico podría mejorar el seguimiento y el abordaje terapéutico de estos niños. El objetivo de este trabajo es analizar las características neuromadurativas de los andadores de puntillas (AP) de edad preescolar en relación con un grupo control (GC). Método: Mediante un estudio descriptivo transversal se han comparado los posibles factores de riesgo, las características del neurodesarrollo y los resultados del Cuestionario de Madurez Neuropsicológica Infantil (CUMANIN) de un grupo de 56 AP de entre 3 y 6 años con un GC de 40 niños. Resultados: Entre los AP había un mayor porcentaje de varones (p=0,008) y este grupo presentaba un porcentaje significativamente mayor de antecedentes familiares (p=0,000) y de factores de riesgo biológico durante el período perinatal (p=0,032). Los padres manifestaron que los AP mostraban una torpeza motriz significativamente superior (59%; p=0,009). Los AP obtuvieron en el CUMANIN puntuaciones significativamente inferiores en las escalas de psicomotricidad (p=0,001) y memoria (p=0,001), y en el desarrollo verbal (p=0,000), no verbal (p=0,026) y total (p=0,004), además de una menor definición de la lateralidad podálica (p=0,047). Conclusiones: Los AP de la muestra estudiada presentan características neuromadurativas específicas que apoyan la consideración de la marcha de puntillas como marcador de problemas del desarrollo, aunque son necesarios más estudios (AU)


Introduction: Idiopathic toe walking, a differential diagnosis for neurological and orthopaedic disorders, has been associated with neurodevelopmental alterations. Neurodevelopmental assessment at early ages using specific tests may improve management and follow-up of these patients. The aim of our study is to analyse the neurodevelopmental characteristics of preschool idiopathic toe-walkers (ITW) by comparing them to a control group. Method: Our descriptive cross-sectional study compared possible risk factors, neurodevelopmental characteristics, and scores on the Child Neuropsychological Maturity Questionnaire (CUMANIN) between a group of 56 ITWs aged 3 to 6 and a control group including 40 children. Results: The proportion of males was significantly higher in the ITW group (P=.008). The percentage of patients with a family history (P=.000) and biological risk factors during the perinatal period (P=.032) was also higher in this group. According to the parents’ reports, motor coordination in ITWs was significantly poorer (59%; P=.009). ITWs scored significantly lower on CUMANIN subscales of psychomotricity (=0,001) and memory (P=.001), as well as in verbal development (P=.000), non-verbal development (P=.026), and overall development (P=.004). Foot preference was less marked in the ITW group (P=.047). Conclusions: The neurodevelopmental characteristics of our sample suggest that idiopathic toe walking is a marker of neurodevelopmental impairment. However, further studies are necessary to confirm these findings (AU)


Asunto(s)
Humanos , Preescolar , Caminata/fisiología , Marcha/fisiología , Postura , Deformidades Adquiridas del Pie/fisiopatología , Desarrollo Infantil , Estudios de Casos y Controles , Enfermedades Musculoesqueléticas/fisiopatología , Hábitos
20.
Acta pediatr. esp ; 74(9): 218-223, oct. 2016. tab, graf
Artículo en Español | IBECS (España) | ID: ibc-157328

RESUMEN

Introducción: La marcha de puntillas idiopática, considerada un diagnóstico de exclusión de alteraciones neurológicas y ortopédicas, se ha relacionado con diversas alteraciones ortopédicas del pie y del tobillo. Aunque la limitación en la movilidad del tobillo resulta el criterio de valoración e indicación terapéutica más empleado, su evaluación en edades tempranas y la comparación con valores de normalidad no han sido apenas estudiadas. El objetivo de este trabajo es verificar si la evaluación precoz de los niños andadores de puntillas (AP) pone de manifiesto características clínicas diferenciales que indiquen riesgos ortopédicos. Pacientes y métodos: Mediante un estudio descriptivo transversal se ha comparado la estática y la movilidad de rodilla, tobillo y pie de un grupo de 56 AP de 3-6 años de edad con un grupo de 40 niños de un grupo control (GC). Resultados: Se descartó en los AP (el 69,6% varones; p= 0,008) un flexo de rodilla, pero presentaron una menor movilidad pasiva del tobillo con la rodilla flexionada (p <0,05) y una mayor disminución del apoyo del talón en bipedestación que los niños del GC (p= 0,000). Los AP mostraron también una mayor pronación del pie, corroborada en un mayor valgo de calcáneo, ángulo de pronación, caída del navicular y pico de pronación en la huella plantar (p <0,05). Conclusiones: La evaluación clínica de los AP en edad preescolar mediante pruebas específicas facilita la detección de riesgos ortopédicos, lo que podría permitir establecer medidas específicas para evitar su posible evolución negativa (AU)


Introduction: Idiopathic tiptoe gait, considered as a diagnosis of exclusion of neurological and orthopedical diseases, has been related to various foot and ankle orthopedic alterations. The limitation of the ankle movement range is the main guideline for evaluation and therapeutical indication. However, its early assessment and its comparison with normality values have been seldom studied. The aim of the present work is to verify if the early evaluation of toe walkers (TW) reveals specific clinical characteristics denoting orthopedical risks. Patients and methods: A cross-sectional study was conducted to compare the posture and the movement of knee, ankle and foot of a group of 56 TW and a group of 40 controls (CG), aged 3 to 6 years old. Results: TW children, 69.6% of them boys (p= 0.008), did not suffer a knee flexum, but they demonstrated a lower passive ankle mobility measured with the knee flexed (p <0.05) and a diminution of the heel support while standing than CG children (p= 0.000). TW also showed more pronation of the foot, objectified in a higher calcaneus valgus, pronation angle, navicular drop and pronation peak observed in the footprint (p <0.05). Conclusions: Clinical evaluation in preschool ITW by means of specific measures helps detecting orthopedical risks. It could allow to set particular strategies to prevent their possible negative evolution (AU)


Asunto(s)
Humanos , Preescolar , Marcha/fisiología , Pie Equino/epidemiología , Deformidades Adquiridas del Pie/epidemiología , Pie Plano/epidemiología , Caminata/fisiología , Fenómenos Fisiológicos Musculoesqueléticos , Enfermedades Musculoesqueléticas/epidemiología , Hábitos
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