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1.
Acad Radiol ; 27(6): 841-846, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-31494004

RESUMEN

AIMS AND OBJECTIVES: Varicocele embolization is a growing treatment modality owing to the safety, efficacy, and quick return to work following the procedure. The internet is the most dominant source of information for many. We aimed to assess the quality of information accessible by patients considering treatment. MATERIALS AND METHODS: A list of applicable, commonly used searchable terms was generated. Each term was assessed across the five most-used English language search engines to determine the two most commonly used terms. These two terms were then investigated across each search engine, with the first 25 web pages returned by each engine included for analysis. Duplicate web pages, nontext content such as video or audio, and web pages behind paywalls were excluded. Web pages were analyzed for quality and readability using validated tools including DISCERN score, JAMA Benchmark Criteria, HONcode Certification, Flesch Reading Ease Score, Flesch-Kincaid Grade Level, and Gunning-Fog Index. Secondary features including age, rank, author, and publisher were recorded. RESULTS: The most common applicable terms were "Testicular embolization" (378,300 results) and "Varicocele embolization" (375,800 results). Mean DISCERN quality of information provided by websites is "fair"; Adherence to JAMA Benchmark Criteria was 13.5%. Flesh-Kincaid readability tests demonstrated an average "9th grade" reading level. Scientific journals showed the highest quality scores, but were least up to date with an average web page age of 11.2 years. Web pages produced by "for-profit" organizations were the second most current (average age 2.7 years), but displayed the lowest quality of information scores. CONCLUSION: While quality of online information available to patients is "fair," adherence to JAMA benchmark criteria is poor. "For-profit" organization websites are far more numerous and significantly more up-to-date, yet showed significantly lower quality of information scores. Scientific journals were unsurprisingly of higher quality, yet more challenging for the general public to read. These findings call for the production of high-quality and comprehensible content regarding interventional radiology, where physicians can reliably direct their patients for information.


Asunto(s)
Embolización Terapéutica , Varicocele , Preescolar , Comprensión , Humanos , Internet , Masculino , Lectura , Motor de Búsqueda , Varicocele/diagnóstico por imagen , Varicocele/terapia
3.
J Postgrad Med ; 54(4): 316-7, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18953153

RESUMEN

Lamotrigine is a commonly used agent for seizure control in epilepsy. There are limited data on the adverse effects of lamotrigine in overdose. We report a number of serious side-effects associated with a large overdose of lamotrigine. A 23-year-old female presented to the emergency department after taking an intentional overdose of 9.2 g of lamotrigine, 56 mg of chlorpheniramine, and 220 mg of citalopram. On admission, she had a reduced level of consciousness and electrocardiographic abnormalities; a widened QRS and a prolonged corrected QT (QTc) interval. Prompt treatment with early intubation, along with the use of magnesium for cardioprotection and administration of sodium bicarbonate may have aided in a quick recovery with a short intensive care stay and good outcome.


Asunto(s)
Anticonvulsivantes/envenenamiento , Clorfeniramina/envenenamiento , Citalopram/envenenamiento , Sobredosis de Droga/tratamiento farmacológico , Triazinas/envenenamiento , Administración Oral , Adulto , Anticonvulsivantes/administración & dosificación , Clorfeniramina/administración & dosificación , Citalopram/administración & dosificación , Electrocardiografía/efectos de los fármacos , Femenino , Humanos , Lamotrigina , Síndrome de QT Prolongado/inducido químicamente , Intoxicación/tratamiento farmacológico , Bicarbonato de Sodio/uso terapéutico , Resultado del Tratamiento , Triazinas/administración & dosificación
4.
Artículo en Ruso | MEDLINE | ID: mdl-18038554

RESUMEN

Electrooptical characteristics of Azospirillum brasilense Sp7 cells during their specific interaction with polyclonal rabbit antibodies were studied. Dependence of optical density of cell suspension during electroorientation of cells from frequency of orienting field in interval 10, 100, 250, and 500 kHz was evaluated. Itwas shown that electrooptical (EO) characteristics of bacterial suspensions change during interaction of A. brasilense cells with antibodies, and maximal changes occur when frequency of oriented field amounts 100-250 kHz. During interaction of A. brasilense Sp7 with strain-specific polyclonal antibodies in the presence of Escherichia coli K-12 and Pseudomonas putida C-11 decrease of amplitude of analytic signal was observed but detection of A. brasilense Sp7 cells was possible. Possibility of detection of microorganisms by EO analysis during their interaction with antibodies was shown.


Asunto(s)
Anticuerpos Antibacterianos/inmunología , Azospirillum brasilense/fisiología , Técnicas Biosensibles/métodos , Animales , Especificidad de Anticuerpos , Azospirillum brasilense/aislamiento & purificación , Electricidad , Electrofisiología , Óptica y Fotónica , Conejos
5.
Mikrobiologiia ; 74(2): 198-203, 2005.
Artículo en Ruso | MEDLINE | ID: mdl-15938396

RESUMEN

The electrophysical properties of Escherichia coli XL-1 cells interacting with helper phage M13K07 were studied as a function of the phage-to-cell ratio and the contact time. The electro-optical signal of bacterial cells changed considerably as soon as 10 min after the onset of their incubation with phage particles, presumably due to phage adsorption on the cell surface. The maximum changes in the orientational spectra of cell suspensions were observed when the phage-to-cell ratio was 20. Selectivity studies showed that E. coli XL-1 cells interacting with the helper phage M13K07 in the presence of foreign microflora, such as E. coli K-12 or Azospirillum brasilense Sp7, can be identified by using their electrophysical properties. Changes in the orientational spectra of cell suspensions are interpreted with the stage of phage-bacterium interaction taken into account. The results obtained can probably be used to devise a new rapid method for identification of microorganisms and to study the particular stages of cell infection by bacteriophages.


Asunto(s)
Bacteriófago M13/fisiología , Escherichia coli/virología , Bacteriófago M13/patogenicidad , Electrofisiología , Escherichia coli/aislamiento & purificación , Escherichia coli/fisiología , Especificidad de la Especie , Análisis Espectral
6.
Biofizika ; 50(2): 316-21, 2005.
Artículo en Ruso | MEDLINE | ID: mdl-15856991

RESUMEN

An electrooptical approach was used in studies of Listeria monocytogenes-antibody binding. An electrooptical analyzer, which has been developed at the State Research Center for Applied Microbiology (Obolensk, Russia), was used as a basic instrument for electrooptical measurements. The analyzer consists of the following modules: a sample preparation module, a mixer, an AC field generator, an EO-flow cell, a microcontroller for transfer of liquid, a thermal system, an operator interface, and an image processor. The sample preparation module includes a unit for an automatic filter changing device and a hydraulic system. Since the AC electrokinetic effects depend on the dielectric properties of bioparticles, their composition, morphology, phenotype, the medium, and the frequency of applied electrical field, the electroorientational spectra were used for discrimination of different types of bacteria, a given type being "controlled" (and identified) by the selective choice of binding agents (antibodies). The measurements were performed using a discrete set of frequencies of the orienting electric field (10, 100, 250, and 500 kHz). During biospecific interactions, an antibody is bound to the microorganism, causing a change in the dielectric properties of the microorganism-antibody complex, and the electrooptic signal reaches its maximum at 100-200 kHz. It was shown that the biospecific interactions of Listeria monocytogenes cells with anti-Listeria antibody in the presence of E. coli K-12, and A. brasilense sp7 significantly change the electrooptical signals. Thus, the determination of the presence of particular bacteria within a mixed sample may be achieved by selection and matching of antibodies specific to individual bacterium types and by comparing the spectra of bacterium in the presence and in the absence of specific binding agent (antibody).


Asunto(s)
Anticuerpos Monoclonales/inmunología , Listeria monocytogenes/fisiología , Azospirillum brasilense/fisiología , Técnicas Bacteriológicas/métodos , Conductividad Eléctrica , Campos Electromagnéticos , Escherichia coli/fisiología , Oro Coloide , Listeria monocytogenes/inmunología , Listeria monocytogenes/ultraestructura , Microscopía Electrónica de Transmisión
7.
Gut ; 54(2): 242-9, 2005 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-15647189

RESUMEN

BACKGROUND AND AIMS: Ulcerative colitis (UC) is an acute and chronic inflammatory disease of the large bowel with unknown aetiology. The immune response against normal commensal microorganisms is believed to drive inflammatory processes associated with UC. Therefore, modulation of bacterial communities on the gut mucosa, through the use of probiotics and prebiotics, may be used to modify the disease state. METHODS: A synbiotic was developed for use in UC patients combining a probiotic, Bifidobacterium longum, isolated from healthy rectal epithelium, and a prebiotic (Synergy 1), a preferential inulin-oligofructose growth substrate for the probiotic strain. Treatment was employed in a double blinded randomised controlled trial using 18 patients with active UC for a period of one month. Clinical status was scored and rectal biopsies were collected before and after treatment, and transcription levels of epithelium related immune markers were measured. RESULTS: Sigmoidoscopy scores (scale 0-6) were reduced in the test group (start 4.5 (1.4), end 3.1 (2.5)) compared with placebo (start 2.6 (2.1), end 3.2 (2.2)) (p=0.06). mRNA levels for human beta defensins 2, 3, and 4, which are strongly upregulated in active UC, were significantly reduced in the test group after treatment (p=0.016, 0.038, and 0.008, respectively). Tumour necrosis factor alpha and interleukin 1alpha, which are inflammatory cytokines that drive inflammation and induce defensin expression, were also significantly reduced after treatment (p=0.018 and 0.023, respectively). Biopsies in the test group had reduced inflammation and regeneration of epithelial tissue. CONCLUSIONS: Short term synbiotic treatment of active UC resulted in improvement of the full clinical appearance of chronic inflammation in patients receiving this therapy.


Asunto(s)
Bifidobacterium , Colitis Ulcerosa/terapia , Probióticos/uso terapéutico , Adulto , Anciano , Bifidobacterium/aislamiento & purificación , Biopsia , Proteína C-Reactiva/metabolismo , Colitis Ulcerosa/metabolismo , Colitis Ulcerosa/patología , Citocinas/biosíntesis , Citocinas/genética , Método Doble Ciego , Femenino , Expresión Génica , Humanos , Mediadores de Inflamación/metabolismo , Mucosa Intestinal/microbiología , Mucosa Intestinal/patología , Masculino , Persona de Mediana Edad , Oligosacáridos/uso terapéutico , Proyectos Piloto , ARN Mensajero/genética , Recto/patología , Sigmoidoscopía , Resultado del Tratamiento , beta-Defensinas/biosíntesis , beta-Defensinas/genética
8.
J Nutr Health Aging ; 8(2): 109-12, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-14978606

RESUMEN

The state of health in the European Union is better than ever before. This is due to spectacular progress made over the second half of this century in terms of medical research, health services provision and living conditions. However, older people require more, and substantially different, health and care services than younger people. The central challenge of the policy makers is to ensure that future health care policies will provide an adequate and cost effective response to the changes brought about by demographic trends.


Asunto(s)
Atención a la Salud , Encuestas de Atención de la Salud , Servicios de Salud para Ancianos/organización & administración , Anciano , Europa (Continente) , Unión Europea , Femenino , Política de Salud , Investigación sobre Servicios de Salud , Humanos , Masculino , Evaluación de Necesidades
10.
Biochem Biophys Res Commun ; 284(3): 549-55, 2001 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-11396934

RESUMEN

Antimicrobial activity was detected in acid extracts of liver, intestine, and stomach of healthy Atlantic salmon (Salmo salar). An antimicrobial protein was isolated from salmon liver using acid extraction followed by ammonium sulfate precipitation, large-scale gel filtration chromatography, reverse-phase HPLC, and size exclusion HPLC. The salmon antimicrobial (SAM) protein was found to have a molecular mass of 20,734 Da by MALDI TOF mass spectrometry. Peptide mass fingerprinting and partial sequencing by tandem nanoelectrospray mass spectrometry identified the protein as histone H1. The protein had a minimal inhibitory concentration of 31 microg/mL against E. coli D31 in a plate clearing assay. The effect of the SAM protein on bacterial morphology was indistinguishable from that of (Ala-(8,13,18))-magainin II, as shown by scanning electron microscopy, which suggests that the protein disrupts E. coli membranes in a manner similar to that of most antimicrobial peptides. This protein may act as an antimicrobial in vivo through active secretion or by release from cells during infection-related apoptosis.


Asunto(s)
Antibacterianos/farmacología , Histonas/farmacología , Salmo salar , Animales , Antibacterianos/química , Antibacterianos/aislamiento & purificación , Cromatografía en Gel , Cromatografía Líquida de Alta Presión , Escherichia coli/efectos de los fármacos , Escherichia coli/ultraestructura , Histonas/química , Histonas/aislamiento & purificación , Pruebas de Sensibilidad Microbiana , Microscopía Electrónica de Rastreo , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción , Extractos de Tejidos/farmacología
11.
Infect Immun ; 68(9): 5412-5, 2000 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-10948173

RESUMEN

Gastric epithelial cells in vitro and in vivo are shown to constitutively express the peptide antibiotic human beta-defensin type 1 (hBD-1). In contrast, hBD-2 expression is regulated in gastric epithelial cells and increases in response to infection with Helicobacter pylori or stimulation with the proinflammatory cytokine interleukin-1. These data suggest that hBD-2 is a component of the regulated host gastric epithelial cell response to H. pylori infection and proinflammatory mediators.


Asunto(s)
Mucosa Gástrica/metabolismo , Regulación de la Expresión Génica , Helicobacter pylori/fisiología , Interleucina-1/farmacología , Proteínas/genética , beta-Defensinas , Defensinas , Humanos , Lipopolisacáridos/farmacología , ARN Mensajero/análisis , Células Tumorales Cultivadas
12.
15.
J Immunol ; 163(12): 6718-24, 1999 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-10586069

RESUMEN

The intestinal epithelium forms a physical barrier to limit access of enteric microbes to the host and contributes to innate host defense by producing effector molecules against luminal microbes. To further define the role of the intestinal epithelium in antimicrobial host defense, we analyzed the expression, regulation, and production of two antimicrobial peptides, human defensins hBD-1 and hBD-2, by human intestinal epithelial cells in vitro and in vivo. The human colon epithelial cell lines HT-29 and Caco-2 constitutively express hBD-1 mRNA and protein but not hBD-2. However, hBD-2 expression is rapidly induced by IL-1alpha stimulation or infection of those cells with enteroinvasive bacteria. Moreover, hBD-2 functions as a NF-kappaB target gene in the intestinal epithelium as blocking NF-kappaB activation inhibits the up-regulated expression of hBD-2 in response to IL-1alpha stimulation or bacterial infection. Caco-2 cells produce two hBD-1 isoforms and a hBD-2 peptide larger in size than previously described hBD-2 isoforms. Paralleling the in vitro findings, human fetal intestinal xenografts constitutively express hBD-1, but not hBD-2, and hBD-2 expression, but not hBD-1, is up-regulated in xenografts infected intraluminally with Salmonella. hBD-1 is expressed by the epithelium of normal human colon and small intestine, with a similar pattern of expression in inflamed colon. In contrast, there is little hBD-2 expression by the epithelium of normal colon, but abundant hBD-2 expression by the epithelium of inflamed colon. hBD-1 and hBD-2 may be integral components of epithelial innate immunity in the intestine, with each occupying a distinct functional niche in intestinal mucosal defense.


Asunto(s)
Antibacterianos/metabolismo , Mucosa Intestinal/metabolismo , Biosíntesis de Proteínas , Proteínas/metabolismo , beta-Defensinas , Células CACO-2/metabolismo , Colitis Ulcerosa/metabolismo , Colitis Ulcerosa/patología , Colon/inmunología , Colon/metabolismo , Colon/patología , Defensinas , Regulación de la Expresión Génica/inmunología , Células HT29 , Humanos , Interleucina-1/farmacología , Mucosa Intestinal/inmunología , Mucosa Intestinal/patología , FN-kappa B/genética , FN-kappa B/metabolismo , Biosíntesis de Péptidos/inmunología , Proteínas/genética , ARN Mensajero/biosíntesis , Infecciones por Salmonella/genética , Infecciones por Salmonella/inmunología , Infecciones por Salmonella/metabolismo , Trasplante Heterólogo/inmunología
16.
Immunology ; 98(1): 16-26, 1999 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-10469229

RESUMEN

This study explores the expression and the function of major histocompatibility complex class II in the intestinal epithelial cell line CaCo-2, which has been widely used as a model for the human gastrointestinal epithelium. Human leucocyte antigen (HLA)-DR expression on CaCo-2 cells is induceable by interferon-gamma (IFN-gamma), but responsiveness to IFN-gamma is dependent on cell differentiation and IFN-gamma availability at the basolateral cell surface. HLA-DR expression is concentrated in apical cytoplasmic vesicles and on the basolateral cell surface. Invariant chain is expressed in apical vesicles but is absent from the cell surface. Immunoprecipitation studies show a slow rate of dissociation of HLA-DR from Ii. Double labelling shows some overlap between HLA-DR expression and basolateral endosomal markers but no overlap with apical endosomal markers. Functional studies show processing and presentation of lysozyme endocytosed from the basolateral, but not apical surfaces. CaCo-2 cells may provide a useful model with which to dissect the antigen-processing pathways in polarized epithelial cells. The regulated access of antigens taken up from the gut lumen to the processing compartments may prevent overloading the immune system with antigens derived from normal gut contents.


Asunto(s)
Presentación de Antígeno , Antígenos de Histocompatibilidad Clase II/inmunología , Intestinos/inmunología , Modelos Inmunológicos , Antígenos de Diferenciación de Linfocitos B/análisis , Antígenos de Diferenciación de Linfocitos B/inmunología , Células CACO-2 , Epitelio/inmunología , Citometría de Flujo , Antígenos HLA-DR/inmunología , Antígenos de Histocompatibilidad Clase II/análisis , Humanos , Interferón gamma/farmacología , Pruebas de Precipitina
17.
Diagn Cytopathol ; 20(1): 38-43, 1999 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-9884826

RESUMEN

We describe a case of chondroblastic osteosarcoma of the vertebral column in a 67-yr-old male in whom the preoperative diagnosis was made by fine-needle aspiration biopsy (FNAB). This diagnosis was subsequently confirmed in the T8 corpectomy specimen. Although the smears of the aspirate revealed only occasional markedly atypical spindle-shaped nuclei, the cell block was diagnostic of malignancy. It showed a well-preserved fragment of neoplastic cartilage populated by markedly atypical hyperchromatic cells and a crushed fragment of anaplastic spindle-shaped cells surrounded by opaque collagenous matrix reminiscent of osteoid. The surgically resected specimen exhibited comparable histological features as well as colonies of gram-positive bacilli within the necrotic tumor. Culture confirmed the presence of Corynebacterium species. It is likely that these skin organisms were introduced at the time of FNAB. This case demonstrates the value of FNAB in the diagnosis of primary bone tumors and reports a rare complication of this procedure.


Asunto(s)
Infecciones por Corynebacterium/microbiología , Corynebacterium/aislamiento & purificación , Osteosarcoma/microbiología , Neoplasias de la Columna Vertebral/microbiología , Vértebras Torácicas/patología , Anciano , Biopsia con Aguja , Infecciones por Corynebacterium/patología , Infecciones por Corynebacterium/cirugía , Resultado Fatal , Humanos , Masculino , Osteosarcoma/patología , Osteosarcoma/cirugía , Neoplasias de la Columna Vertebral/patología , Neoplasias de la Columna Vertebral/cirugía , Tomografía Computarizada por Rayos X
18.
J Immunol ; 162(2): 791-8, 1999 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-9916700

RESUMEN

IFN-gamma is a crucial mediator in the induction of cell-mediated Th1-type responses but is predominantly a negative regulator of B cell differentiation and proliferation. This cytokine is therefore a key factor in determining Th1 vs Th2 differentiation. This study investigates the action of IFN-gamma in modulation of HLA-DR expression and Ag presentation by EBV-transformed human B cell lines. In contrast to its action on the monocyte/macrophage, IFN-gamma down-regulates surface MHC expression on these B cells, and this regulation is posttranscriptional. In parallel with MHC down-regulation, there is a reduced capability to process and present exogenous protein and peptide Ag to T cell hybridomas. IFN-gamma does not change the rates of fluid phase endocytosis or exocytosis in this model system but correlates with an up-regulation of the lysosomal enzymes cathepsins B and D.


Asunto(s)
Presentación de Antígeno/inmunología , Linfocitos B/inmunología , Linfocitos B/metabolismo , Regulación hacia Abajo/inmunología , Antígenos de Histocompatibilidad Clase II/biosíntesis , Interferón gamma/farmacología , Animales , Presentación de Antígeno/genética , Apoptosis/inmunología , Linfocitos B/enzimología , Catepsinas/antagonistas & inhibidores , Catepsinas/biosíntesis , Catepsinas/metabolismo , Línea Celular Transformada , Membrana Celular/inmunología , Membrana Celular/metabolismo , Endocitosis/inmunología , Antígenos HLA-D/metabolismo , Antígenos de Histocompatibilidad Clase II/genética , Humanos , Hibridomas/inmunología , Hibridomas/metabolismo , Ratones , Muramidasa/inmunología , Muramidasa/metabolismo , Transfección/inmunología
19.
Proc Natl Acad Sci U S A ; 95(25): 14903-8, 1998 Dec 08.
Artículo en Inglés | MEDLINE | ID: mdl-9843988

RESUMEN

T cells recognizing poorly displayed self determinants escape tolerance mechanisms and persist in the adult repertoire. The process by which these T cells are primed is not clear, but once activated, they can cause autoimmunity. Here, we show that dendritic cells treated with interleukin 6 (IL-6) process and present determinants from a model native antigen in a qualitatively altered hierarchy, activating T cells in vitro and in vivo against determinants that were previously cryptic because of poor display. IL-6 does not induce conventional maturation of dendritic cells but alters the pH of peripheral, early endosomal compartments and renders the cells more susceptible to killing by chloroquine. Acidification of endosomes by ouabain mimics the effect of IL-6 and allows processing of the same cryptic determinant. These results suggest that cytokines such as IL-6 could initiate and help to propagate an autoimmune disease process by differentiating dendritic cells into a state distinct from that induced by normal maturation.


Asunto(s)
Presentación de Antígeno , Comunicación Celular/inmunología , Células Dendríticas/inmunología , Interleucina-6/inmunología , Muramidasa/inmunología , Linfocitos T/inmunología , Animales , Autoinmunidad , Femenino , Humanos , Interleucina-6/farmacología , Activación de Linfocitos/efectos de los fármacos , Activación de Linfocitos/inmunología , Ratones , Ratones Endogámicos BALB C , Ratones Endogámicos CBA
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