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1.
Ultrasound Obstet Gynecol ; 58(6): 916-925, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-33847427

RESUMEN

OBJECTIVES: Fusion imaging is an emerging technique that combines real-time ultrasound examination with images acquired previously using other modalities, such as computed tomography (CT), magnetic resonance imaging and positron emission tomography. The primary aim of this study was to evaluate the feasibility of fusion imaging in patients with suspicion of ovarian or peritoneal cancer. Secondary aims were: to compare the agreement of findings on fusion imaging, CT alone and ultrasound imaging alone with laparoscopic findings, in the assessment of extent of intra-abdominal disease; and to evaluate the time required for the fusion imaging technique. METHODS: Patients with clinical and/or radiographic suspicion of advanced ovarian or peritoneal cancer who were candidates for surgery were enrolled prospectively between December 2019 and September 2020. All patients underwent a CT scan and ultrasound and fusion imaging to evaluate the presence or absence of the following abdominal-cancer features according to the laparoscopy-based scoring model (predictive index value (PIV)): supracolic omental disease, visceral carcinomatosis on the liver, lesser omental carcinomatosis and/or visceral carcinomatosis on the lesser curvature of the stomach and/or spleen, involvement of the paracolic gutter(s) and/or anterior abdominal wall, involvement of the diaphragm and visceral carcinomatosis on the small and/or large bowel (regardless of rectosigmoid involvement). The feasibility of the fusion examination in these patients was evaluated. Agreement of each imaging method (ultrasound, CT and fusion imaging) with laparoscopy (considered as reference standard) was calculated using Cohen's kappa coefficient. RESULTS: Fifty-two patients were enrolled into the study. Fusion imaging was feasible in 51 (98%) of these patients (in one patient, it was not possible for technical reasons). Two patients were excluded because laparoscopy was not performed, leaving 49 women in the final analysis. Kappa values for CT, ultrasound and fusion imaging, using laparoscopy as the reference standard, in assessing the PIV parameters were, respectively: 0.781, 0.845 and 0.896 for the great omentum; 0.329, 0.608 and 0.847 for the liver surface; 0.472, 0.549 and 0.756 for the lesser omentum and/or stomach and/or spleen; 0.385, 0.588 and 0.795 for the paracolic gutter(s) and/or anterior abdominal wall; 0.385, 0.497 and 0.657 for the diaphragm; and 0.336, 0.410 and 0.469 for the bowel. The median time needed to perform the fusion examination was 20 (range, 10-40) min. CONCLUSION: Fusion of CT images and real-time ultrasound imaging is feasible in patients with suspicion of ovarian or peritoneal cancer and improves the agreement with surgical findings when compared with ultrasound or CT scan alone. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.


Asunto(s)
Procesamiento de Imagen Asistido por Computador/métodos , Imagen Multimodal/métodos , Neoplasias Ováricas/diagnóstico por imagen , Neoplasias Peritoneales/diagnóstico por imagen , Ultrasonografía/métodos , Adulto , Anciano , Sistemas de Computación , Estudios de Factibilidad , Femenino , Humanos , Laparoscopía/estadística & datos numéricos , Persona de Mediana Edad , Reproducibilidad de los Resultados , Factores de Tiempo , Tomografía Computarizada por Rayos X/estadística & datos numéricos
2.
Lupus ; 28(4): 538-544, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30885082

RESUMEN

Our aim was to identify subclinical right ventricular (RV) alterations in systemic lupus erythematosus (SLE) by combining standard and three-dimensional echocardiography (3DE). Fifty SLE patients without concomitant cardiac disease and 50 healthy controls, matched for age and gender, were enrolled. Disease damage was evaluated by inflammatory markers and SLE damage index. All patients underwent an echo-Doppler examination with 3DE assessment of RV function, RV septal and lateral longitudinal strain. The two groups had comparable body mass index and blood pressure. RV transversal middle diameter and pulmonary arterial pressure were significantly higher in SLE compared to controls. By 3DE, RV end-systolic volume ( p = 0.037) was greater, whereas stroke volume ( p = 0.023), ejection fraction ( p < 0.0001) and septal and lateral longitudinal strain (both p < 0.0001) were lower in SLE. SLE damage index ≥ 1 was negatively associated with tricuspid annular plane systolic excursion (TAPSE) ( p < 0.002), tricuspid E/A ratio ( p = 0.003), RV ejection fraction ( p < 0.05), lateral longitudinal strain ( p < 0.0001) and septal longitudinal strain ( p = 0.04). By separate multivariate models, after adjusting for age, C reactive protein and proBNP, SLE damage index was independently associated with TAPSE ( p = 0.009) and RV lateral longitudinal strain ( p = 0.007). In conclusion, a subclinical RV systolic dysfunction is detectable in SLE by 3DE, RV lateral wall strain being a key parameter. RV dysfunction is associated with cumulative disease damage.


Asunto(s)
Ecocardiografía Tridimensional/métodos , Ventrículos Cardíacos/diagnóstico por imagen , Lupus Eritematoso Sistémico/complicaciones , Disfunción Ventricular Derecha/diagnóstico por imagen , Disfunción Ventricular Derecha/etiología , Adulto , Presión Sanguínea , Índice de Masa Corporal , Estudios de Casos y Controles , Ecocardiografía Doppler , Femenino , Humanos , Hipertensión Pulmonar/etiología , Masculino , Persona de Mediana Edad , Análisis de Regresión , Volumen Sistólico , Función Ventricular Derecha , Población Blanca
3.
Ann Ig ; 31(6): 556-575, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31616900

RESUMEN

BACKGROUND: In the field of doping prevention, alongside the traditional functions of repression and control of the phenomenon, educational aspects are becoming increasingly important. Article 18 of the World Anti doping Code obliges the signatories to invest in anti-doping education with the aim of preserving the spirit of sport. The educational commitment should involve young people in health promotion interventions for the prevention of risk behaviors. Therefore, our attention has focused on finding the mechanisms that lead people to make certain behavioral choices. MATERIAL AND METHODS: In the context of preventive programs, to counter the doping phenomenon through health promotion programs, the most recognized method is peer education, particularly with adolescents. It is an educational method according to which some members of a group are empowered and trained to carry out specific activities with their peers. It is constituted as an example of equal relationship and finds its basis in cooperation and solidarity with the aim of increasing empowerment and a healthy development of the identity and collective dimension in young people. RESULTS: Numerous experts - biologists / nutritionists, hygienists, sports coaches, psychologists, teachers of physical education in secondary schools and other stakeholders have actively participated in the co-construction of a training package aimed at activating cascade training processes on the knowledge and skills of peer education in contexts of youth aggregation, such as schools, gyms, sports associations, social gatherings of all kinds. The path allowed to define a peer education model capable of enabling the participants to activate health promotion interventions for the prevention of doping risk behaviors, each in their own setting. CONCLUSIONS: In conclusion, we can say that prevention programs are the more effective the more they are addressed to young people and adolescents and provide interactive and action-oriented interventions. Successful initiatives aim to emphasize the development of life skills and to influence numerous determinants of behavior, including individual attitudes, knowledge, motivations, interpersonal relationships and social norms. If the aim is to act on the change of behavior, the efforts will be more successful if the content of the intervention will give due consideration to the context in which it applies and the target population, involving it and addressing its specific needs and values.


Asunto(s)
Doping en los Deportes/prevención & control , Educación en Salud/métodos , Promoción de la Salud/métodos , Grupo Paritario , Adolescente , Conocimientos, Actitudes y Práctica en Salud , Humanos , Motivación , Asunción de Riesgos , Instituciones Académicas
4.
Phys Chem Chem Phys ; 19(23): 14937-14946, 2017 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-28374022

RESUMEN

Ion Mobility Spectrometry-Mass Spectrometry (IMS-MS) is a rapidly emerging tool for the investigation of nucleic acid structure and dynamics. IMS-MS determinations can provide valuable information regarding alternative topologies, folding intermediates, and conformational heterogeneities, which are not readily accessible to other analytical techniques. The leading strategies for data interpretation rely on computational and experimental approaches to correctly assign experimental observations to putative structures. A very effective strategy involves the application of molecular dynamics (MD) simulations to predict the structure of the analyte molecule, calculate its collision cross section (CCS), and then compare this computational value with the corresponding experimental data. While this approach works well for small nucleic acid species, analyzing larger nucleic acids of biological interest is hampered by the computational cost associated with capturing their extensive structure and dynamics in all-atom detail. In this report, we describe the implementation of a coarse graining (CG) approach to reduce the cost of the computational methods employed in the data interpretation workflow. Our framework employs a five-bead model to accurately represent each nucleotide in the nucleic acid structure. The beads are appropriately parameterized to enable the direct calculation of CCS values from CG models, thus affording the ability to pursue the analysis of larger, highly dynamic constructs. The validity of this approach was successfully confirmed by the excellent correlation between the CCS values obtained in parallel by all-atom and CG workflows.


Asunto(s)
Espectrometría de Movilidad Iónica , Simulación de Dinámica Molecular , Ácidos Nucleicos/química , Espectrometría de Masas , Nucleótidos/química
5.
Int J Obes (Lond) ; 40(6): 929-37, 2016 06.
Artículo en Inglés | MEDLINE | ID: mdl-26980478

RESUMEN

BACKGROUND/OBJECTIVES: The genomic bases of the adipose tissue abnormalities induced by chronic positive calorie excess have been only partially elucidated. We adopted a genome-wide approach to directly test whether long-term high-fat diet (HFD) exposure affects the DNA methylation profile of the mouse adipose tissue and to identify the functional consequences of these changes. SUBJECTS/METHODS: We have used epididymal fat of mice fed either high-fat (HFD) or regular chow (STD) diet for 5 months and performed genome-wide DNA methylation analyses by methylated DNA immunoprecipitation sequencing (MeDIP-seq). Mouse Homeobox (Hox) Gene DNA Methylation PCR, RT-qPCR and bisulphite sequencing analyses were then performed. RESULTS: Mice fed the HFD progressively expanded their adipose mass accompanied by a significant decrease in glucose tolerance (P<0.001) and insulin sensitivity (P<0.05). MeDIP-seq data analysis revealed a uniform distribution of differentially methylated regions (DMR) through the entire adipocyte genome, with a higher number of hypermethylated regions in HFD mice (P<0.005). This different methylation profile was accompanied by increased expression of the Dnmt3a DNA methyltransferase (Dnmt; P<0.05) and the methyl-CpG-binding domain protein Mbd3 (P<0.05) genes in HFD mice. Gene ontology analysis revealed that, in the HFD-treated mice, the Hox family of development genes was highly enriched in differentially methylated genes (P=0.008). To validate this finding, Hoxa5, which is implicated in fat tissue differentiation and remodeling, has been selected and analyzed by bisulphite sequencing, confirming hypermethylation in the adipose tissue from the HFD mice. Hoxa5 hypermethylation was associated with downregulation of Hoxa5 mRNA and protein expression. Feeding animals previously exposed to the HFD with a standard chow diet for two further months improved the metabolic phenotype of the animals, accompanied by return of Hoxa5 methylation and expression levels (P<0.05) to values similar to those of the control mice maintained under standard chow. CONCLUSIONS: HFD induces adipose tissue abnormalities accompanied by epigenetic changes at the Hoxa5 adipose tissue remodeling gene.


Asunto(s)
Tejido Adiposo/metabolismo , Metilación de ADN , Dieta Alta en Grasa , Regulación hacia Abajo , Proteínas de Homeodominio/genética , Fosfoproteínas/genética , Transcripción Genética , Animales , Modelos Animales de Enfermedad , Epigénesis Genética , Inmunohistoquímica , Masculino , Ratones , Ratones Endogámicos C57BL , Obesidad/genética , Factores de Transcripción
8.
Genesis ; 53(1): 15-33, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25382437

RESUMEN

The recent advances on ascidian pigment sensory organ development and function represent a fascinating platform to get insight on the basic programs of chordate eye formation. This review aims to summarize current knowledge, at the structural and molecular levels, on the two main building blocks of ascidian light sensory organ, i.e. pigment cells and photoreceptor cells. The unique features of these structures (e.g., simplicity and well characterized cell lineage) are indeed making it possible to dissect the developmental programs at single cell resolution and will soon provide a panel of molecular tools to be exploited for a deep developmental and comparative-evolutionary analysis.


Asunto(s)
Pigmentación , Órganos de los Sentidos/crecimiento & desarrollo , Urocordados/crecimiento & desarrollo , Animales , Evolución Biológica , Linaje de la Célula , Cordados/genética , Regulación del Desarrollo de la Expresión Génica , Larva , Melaninas/biosíntesis , Melaninas/genética , Células Fotorreceptoras de Invertebrados/metabolismo , Factores de Transcripción/genética , Urocordados/genética , Visión Ocular
9.
Minerva Endocrinol ; 38(4): 389-94, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24285106

RESUMEN

AIM: Primary hyperparathyroidism (PHPT) is one of main cause of morbidity in patients with multiple endocrine neoplasia type 1 (MEN1). Medical therapy with cinacalcet-hydrochloride may modify the therapeutic strategy of MEN1 related PHPT. We present an experience with cinacalcet-hydrochloride in two patients with MEN1 PHPT. METHODS: The study included two MEN1 patients belonging to the same family (a 50-year-old woman and her daughter aged 20 years) with PHPT secondary to multiple involvement of parathyroid glands and other MEN1 related tumors. As both patients refused to undergo parathyroid surgery, we decided to start medical treatment with cinacalcet at the dose of 30 mg/day, which was the first treatment for the youngest patient, while the oldest had already been treated with partial parathyroidectomy. Serum concentrations of PTH, calcium and phosphorus, 24-h urine calcium-to-creatinine ratio and renal-threshold-phosphate concentration were evaluated before and after therapy. RESULTS: Serum calcium and PTH levels were normalized after 1 and 6 months of therapy, respectively, and 60 and 54 months after the beginning of cinacalcet remained normal. Hypercalciuria, hypophosphoremia and renal-threshold-phosphate normalized during therapy with cinacalcet. At ultrasonography, parathyroid nodular lesion remained unchanged. Cinacalcet was well tolerated without occurrence of side effects. CONCLUSION: Cinacalcet seems to be highly effective in controlling PHPT in patients with MEN1 either in naïve patients or in those with postsurgical recurrence. If cinacalcet will be confirmed to ensure a long-time control of PHPT or even to prevent the development and progression of PHPT, this may led to modify the therapeutic strategy of MEN1 PHPT.


Asunto(s)
Calcimiméticos/uso terapéutico , Hiperparatiroidismo Primario/tratamiento farmacológico , Hiperparatiroidismo Primario/genética , Neoplasia Endocrina Múltiple Tipo 1/complicaciones , Naftalenos/uso terapéutico , Adulto , Biomarcadores/sangre , Calcio/sangre , Cinacalcet , Femenino , Estudios de Seguimiento , Humanos , Hiperparatiroidismo Primario/sangre , Hiperparatiroidismo Primario/diagnóstico , Hiperparatiroidismo Primario/cirugía , Persona de Mediana Edad , Madres , Núcleo Familiar , Hormona Paratiroidea/sangre , Linaje , Fósforo/sangre , Resultado del Tratamiento
10.
Nat Genet ; 26(4): 415-23, 2000 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11101837

RESUMEN

We used high-density oligonucleotide microarrays to analyse the genomes and meiotic expression patterns of two yeast strains, SK1 and W303, that display distinct kinetics and efficiencies of sporulation. Hybridization of genomic DNA to arrays revealed numerous gene deletions and polymorphisms in both backgrounds. The expression analysis yielded approximately 1,600 meiotically regulated genes in each strain, with a core set of approximately 60% displaying similar patterns in both strains. Most of these (95%) are MATa/MATalpha-dependent and are not similarly expressed in near-isogenic meiosis-deficient controls. The transcript profiles correlate with the distribution of defined meiotic promoter elements and with the time of known gene function.


Asunto(s)
Meiosis/genética , Saccharomycetales/citología , Saccharomycetales/genética , Sitios de Unión/genética , Eliminación de Gen , Regulación Fúngica de la Expresión Génica , Genoma Fúngico , Cinética , Análisis de Secuencia por Matrices de Oligonucleótidos , Polimorfismo Genético , Regiones Promotoras Genéticas , ARN de Hongos/genética , ARN Mensajero/genética , Saccharomycetales/fisiología , Especificidad de la Especie , Esporas Fúngicas/genética , Factores de Transcripción/metabolismo , Transcripción Genética
11.
Sci Rep ; 12(1): 1247, 2022 Jan 24.
Artículo en Inglés | MEDLINE | ID: mdl-35075220

RESUMEN

Several studies have monitored crustal seismic velocity changes and attempted to relate them to the stress state and physical properties in volume embedding fault systems. The aim is to provide constraints on fault system dynamics and earthquake triggering mechanisms. Here, we reconstruct the spatiotemporal (4D) seismic velocity images of volume embedding the Irpinia fault system (IFS, South Italy), which originated the 1980 Ms 6.9 multi-segmented ruptures. By inverting data from more than ten years of continuous seismicity monitoring, we retrieved time-constant velocity anomalies, whose shapes correlate well with crustal lithology, while time-changing (up to 20%) velocity anomalies are mapped in the central region. Here, the Vp-to-Vs changes at depths of 1-5 km and 8-12 km correlate well with groundwater recharge and geodetic displacement during the same time interval. This correlation provides evidence for the existence of pulsating, pore pressure changes induced by groundwater recharge processes in a deep volume (8-12 km of depth), fractured and saturated with a predominant gas phase (likely CO2). We suggest that tomographic measurements of the Vp-to-Vs spatiotemporal changes are a suitable proxy to track the pore pressure evolution at depth in highly sensitive regions of fault systems.

12.
Sci Rep ; 12(1): 22402, 2022 12 27.
Artículo en Inglés | MEDLINE | ID: mdl-36575294

RESUMEN

Programmed Death Ligand 1 (PD-L1) is crucial in regulating the immunological tolerance in non-small cell lung cancer (NSCLC). Alveolar macrophage (AM)-derived PD-L1 binds to its receptor, PD-1, on surveilling lymphocytes, leading to lymphocyte exhaustion. Increased PD-L1 expression is associated with cigarette smoke (CS)-exposure. However, the PD-L1 role in CS-associated lung diseases associated with NSCLC, such as chronic obstructive pulmonary disease (COPD), is still unclear. In two different cohorts of ever smokers with COPD or NSCLC, and ever and never smoker controls, we evaluated PD-L1 expression: (1) via cutting-edge digital spatial proteomic and transcriptomic profiling (Geomx) of formalin-fixed paraffin-embedded (FFPE) lung tissue sections (n = 19); and (2) via triple immunofluorescence staining of bronchoalveolar lavage (BAL) AMs (n = 83). PD-L1 mRNA expression was also quantified in BAL AMs exposed to CS extract. PD-L1 expression was increased in the bronchiolar wall, parenchyma, and vascular wall from mild-moderate (GOLD 1-2) COPD patients compared to severe-very severe (GOLD 3-4) COPD patients and controls. Within all the COPD patients, PD-L1 protein expression was associated with upregulation of genes involved in tumor progression and downregulation of oncosuppressive genes, and strongly directly correlated with the FEV1% predicted, indicating higher PD-L1 expression in the milder vs. more severe COPD stages. In bronchioles, PD-L1 levels were strongly directly correlated with the number of functionally active AMs. In BAL, we confirmed that AMs from patients with both GOLD 1-2 COPD and NSCLC had the highest and similar, PD-L1 expression levels versus all the other groups, independently from active cigarette smoking. Intriguingly, AMs from patients with more severe COPD had reduced AM PD-L1 expression compared to patients with mild COPD. Acute CS extract stimulation increased PD-L1 mRNA expression only in never-and not in ever-smoker AMs. Lungs from patients with mild COPD and NSCLC are characterized by a similar strong PD-L1 expression signature in bronchioles and functionally active AMs compared to patients with severe COPD and controls. Active smoking does not affect PD-L1 levels. These observations represent a new resource in understanding the innate immune mechanisms underlying the link between COPD and lung cancer onset and progression and pave the way to future studies focused on the mechanisms by which CS promotes tumorigenesis and COPD.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Enfermedad Pulmonar Obstructiva Crónica , Humanos , Neoplasias Pulmonares/patología , Carcinoma de Pulmón de Células no Pequeñas/patología , Antígeno B7-H1/metabolismo , Proteómica , Enfermedad Pulmonar Obstructiva Crónica/patología , ARN Mensajero
13.
Curr Opin Cell Biol ; 5(2): 219-25, 1993 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-8389567

RESUMEN

Meiosis can be viewed both as a process of cell differentiation and as a modification of the mitotic cell cycle. Here we describe recent progress in defining a variety of regulatory mechanisms that govern the meiotic divisions. Studies in the yeast Saccharomyces cerevisiae and in higher organisms have led to complementary insights into these controls.


Asunto(s)
Meiosis/genética , Animales , Escherichia coli , Femenino , Masculino , Oogénesis , Fosfotransferasas , Saccharomyces cerevisiae , Schizosaccharomyces , Espermatogénesis
14.
Int J Cardiovasc Imaging ; 37(11): 3343-3354, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34114150

RESUMEN

Right ventricular (RV) involvement is frequently detected in patients presenting with acute left ventricular myocardial infarction. The ischemic right ventricle carries a dismal outcome by predisposing the heart to arrhythmic events and mechanical or hemodynamic complications. A comprehensive RV evaluation by multimodality imaging could guide clinical practice but has always been a conundrum for the imagers. Two-dimensional echocardiography is the best first-line tool due to its availability of bedside capabilities. More advanced imaging techniques provide a more comprehensive evaluation of the complex RV geometry but are mostly reserved for the post-acute setting. Three-dimensional echocardiography has improved the evaluation of RV volumes and function. The recent application of speckle-tracking echocardiography to the right ventricle appears promising, allowing the earlier detection of subtle RV dysfunction. Cardiac magnetic resonance imaging is considered the gold standard for the RV assessment. Cardiac multidetector computed tomography could be a reliable alternative. The aim of this review is to focus on the growing importance of multimodality imaging of the ischemic right ventricle and to propose a diagnostic algorithm, in order to reach a comprehensive assessment of this too frequently neglected chamber.


Asunto(s)
Ecocardiografía Tridimensional , Disfunción Ventricular Derecha , Algoritmos , Ventrículos Cardíacos/diagnóstico por imagen , Humanos , Valor Predictivo de las Pruebas , Disfunción Ventricular Derecha/diagnóstico por imagen , Disfunción Ventricular Derecha/etiología , Función Ventricular Derecha
15.
J Med Case Rep ; 15(1): 138, 2021 Mar 29.
Artículo en Inglés | MEDLINE | ID: mdl-33775244

RESUMEN

BACKGROUND: Gram-negative bacteria are an uncommon etiology of spontaneous community-acquired adult meningitis and meningoencephalitis. Escherichia coli is a Gram-negative bacterium that is normally present in the intestinal microbial pool. Some Escherichia coli strains can cause diseases in humans and animals, with both intestinal and extraintestinal manifestations (extraintestinal pathogenic Escherichia coli) such as urinary tract infections, bacteremia with sepsis, and, more rarely, meningitis. Meningitis continues to be an important cause of mortality throughout the world, despite progress in antimicrobial chemotherapy and supportive therapy. The mortality rate fluctuates between 15% and 40%, and about 50% of the survivors report neurological sequelae. The majority of Escherichia coli meningitis cases develop as a result of hematogenous spread, with higher degrees of bacteremia also being related to worse prognosis. Cases presenting with impaired consciousness (that is, coma) are also reported to have poorer outcomes. CASE PRESENTATION: We describe the case of a 48-year-old caucasian woman with meningoencephalitis, with a marked alteration of consciousness on admission, and septic shock secondary to pyelonephritis caused by Escherichia coli, treated with targeted antimicrobial therapy and immunoglobulin-M-enriched immunoglobulin (Pentaglobin) preparation as adjuvant therapy. CONCLUSION: Despite the dramatic presentation of the patient on admission, the conflicting data on the use of immunoglobulins in septic shock, and the lack of evidence regarding their use in adult Escherichia coli meningoencephalitis, we obtained a remarkable improvement of her clinical condition, accompanied by partial resolution of her neurological deficits.


Asunto(s)
Infecciones por Escherichia coli , Meningoencefalitis , Sepsis , Choque Séptico , Adulto , Animales , Escherichia coli , Infecciones por Escherichia coli/complicaciones , Infecciones por Escherichia coli/tratamiento farmacológico , Femenino , Humanos , Meningoencefalitis/complicaciones , Meningoencefalitis/diagnóstico , Meningoencefalitis/tratamiento farmacológico , Persona de Mediana Edad , Sepsis/tratamiento farmacológico , Choque Séptico/tratamiento farmacológico
16.
Am J Transplant ; 9(10): 2429-34, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19656133

RESUMEN

Pharmacokinetic (PK) interactions between protease inhibitors (PI(s)) and immunosuppressive agents (IS) are critical elements in the management of HIV-infected patients who undergo liver transplantation (LT(x)). The primary objective of this study was to evaluate the decreases in IS dosages necessary to maintain an appropriate therapeutic window (TW) after initiating PI-based antiretroviral therapy regimens post-LT(x). Single-center, PK cross-sectional study of consecutive HIV-infected adult patients who underwent LT(x) was done. Blood trough concentrations (C(t)) of IS were obtained using a commercial MEIA test; plasma C(t) of PI(s) were measured using HPLC. Twelve consecutive HIV-infected adult patients (11 males, 1 female) were enrolled. More rapid increases in IS plasma C(t) were observed 48 h after initiating ritonavir (RTV)-boosted PI therapy post-LT(x) than when using unboosted PI(s). Seven patients developed acute renal failure. The median fold decrease in IS dosages required to regain IS concentrations that were in the TW was 7.5 (range 6-14) after resuming boosted PI(s) and 2.9 (range 2-4) after unboosted PI(s). The overall median time necessary to reach IS TW after dose adjustment was 3.5 days (range 0-15). Unboosted PI(s) exhibited lesser PK interactions with IS than did RTV-boosted PI(s) and were thus more amenable to use in the post-LT(x) setting.


Asunto(s)
Infecciones por VIH/tratamiento farmacológico , Inhibidores de la Proteasa del VIH/uso terapéutico , Inmunosupresores/uso terapéutico , Trasplante de Hígado , Adulto , Cromatografía Líquida de Alta Presión , Estudios Transversales , Relación Dosis-Respuesta a Droga , Femenino , Infecciones por VIH/cirugía , Inhibidores de la Proteasa del VIH/administración & dosificación , Inhibidores de la Proteasa del VIH/sangre , Humanos , Inmunosupresores/administración & dosificación , Masculino , Persona de Mediana Edad
17.
Science ; 195(4274): 189-91, 1977 Jan 14.
Artículo en Inglés | MEDLINE | ID: mdl-831268

RESUMEN

Rats were given increasing amounts of morphine over a period of weeks in order to achieve tolerance. Doses of the drug which initially reduced the threshold for self-stimulation behavior continued to do so after long-term administration. These results demonstrate a persistent central effect of morphine which may be related to the opiate "high."


Asunto(s)
Morfina/farmacología , Autoestimulación/efectos de los fármacos , Animales , Relación Dosis-Respuesta a Droga , Tolerancia a Medicamentos , Masculino , Morfina/administración & dosificación , Ratas , Factores de Tiempo
18.
Science ; 224(4646): 306-9, 1984 Apr 20.
Artículo en Inglés | MEDLINE | ID: mdl-6710145

RESUMEN

Local rates of cerebral glucose utilization were measured in rats by the quantitative 2-deoxy-D-[14C]glucose autoradiographic method during electrical stimulation of the ventral tegmental area. Rats trained in intracranial self-stimulation showed a pattern of changes in forebrain metabolic activity distinctly different from the pattern seen in rats stimulated by the experimenter. These findings provide information about the distribution of local cerebral activity specific to reinforced instrumental behavior.


Asunto(s)
Encéfalo/metabolismo , Desoxiazúcares/metabolismo , Desoxiglucosa/metabolismo , Recompensa , Autoestimulación/fisiología , Animales , Autorradiografía , Conducta Animal , Diencéfalo/metabolismo , Estimulación Eléctrica , Masculino , Ratas , Ratas Endogámicas , Refuerzo en Psicología , Telencéfalo/metabolismo
19.
Infection ; 37(3): 250-5, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19471855

RESUMEN

BACKGROUND: No data are available on the use of atazanavir (ATV) in patients with end-stage liver disease (ESLD), and guidelines discourage its use in this setting. The objective of our study was to evaluate the efficacy and safety of unboosted ATV in patients infected with HIV and suffering from ESLD who had been screened for orthotopic liver transplantation (OLT(x)). PATIENTS AND METHODS: This was a single-arm, 24-week pilot study. Atazanavir-naïve patients undergoing a highly active antiretroviral therapy were switched to ATV 400 mg daily plus two non-thymidine nucleoside reverse transcriptase inhibitors. RESULTS: Fifteen patients (ten males and five females, age range 36-59 years) were enrolled in the study. Of these, 11 (73%) had a baseline CD4 cell count > 200 microl(-1), and 12 had undetectable plasma HIV-RNA. 12 subjects (80%) were able to remain on ATV until week 24 (n = 10) or transplantation (n = 2). At the end of the study, the median CD4 cell count was 340 microl(-1) , and nine of the ten patients had undetectable RNA. During the study period, two patients received a transplant, two died of intracerebral hemorrhage and lactic acidosis, respectively, and one discontinued ATV. Among the ten patients completing the 24-week study, no significant changes from baseline were observed for most of the liver function markers, with the exception of unconjugated bilirubin (from 1.15 mg/dl to 1.32 mg/dl, p = 0.047). CONCLUSIONS: Unboosted ATV treatment did not worsen liver disease and was able to maintain or gain immunovirological eligibility for OLT(x) in all patients, with a limited effect on unconjugated bilirubin. These results suggest that ATV is an easy-to-use drug in patients with ESLD.


Asunto(s)
Fármacos Anti-VIH/uso terapéutico , Infecciones por VIH/complicaciones , Infecciones por VIH/tratamiento farmacológico , Fallo Hepático/complicaciones , Oligopéptidos/uso terapéutico , Piridinas/uso terapéutico , Adulto , Fármacos Anti-VIH/efectos adversos , Terapia Antirretroviral Altamente Activa , Sulfato de Atazanavir , Recuento de Linfocito CD4 , Femenino , Estudios de Seguimiento , Infecciones por VIH/inmunología , Humanos , Fallo Hepático/mortalidad , Pruebas de Función Hepática , Trasplante de Hígado , Masculino , Persona de Mediana Edad , Oligopéptidos/efectos adversos , Proyectos Piloto , Piridinas/efectos adversos , Resultado del Tratamiento , Carga Viral
20.
Infection ; 37(3): 244-9, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19471856

RESUMEN

BACKGROUND: Although the mechanism of atazanavir (ATV)-related hyperbilirubinemia is well identified, its prevalence, risk factors, and association with transaminase flares have rarely been assessed in a large population from the "real life" setting. METHODS: Prospectively collected data on 2,404 patients from the Italian MASTER Cohort and the Italian ATV expanded access program database were examined. Uni- and multivariable Cox proportional hazards regression models were conducted to identify risk factors for grade >or= III hyperbilirubinemia during the administration of ATV. The risk of increased levels of serum alanine aminotransferase (ALT) was compared between patients with or without grade >or= III hyperbilirubinemia in a Cox regression analysis stratified by hepatitis C virus (HCV) serostatus. RESULTS: Grade III and IV hyperbilirubinemia were observed in 1,072 (44.6%) and 174 (7.2%) of the patients, respectively. Higher CD4+ T-cell counts, abnormal bilirubinemia at baseline, and ritonavir co-administration were associated with a higher risk of developing grade >or= III hyperbilirubinemia. In contrast, female gender, clinical class C, and non-nucleoside reverse transcriptase co-administration appeared to be protective. Higher bilirubinemia at baseline and the use of ritonavir were associated with a higher risk of grade IV hyperbilirubinemia. The occurrence of grade >or= III hyperbilirubinemia was not associated with severe hepatotoxicity (hazard ratio 1.00, 95% confidence interval 0.64-1.57; p = 0.997). CONCLUSIONS: Hyperbilirubinemia is a common side effect of an ATV pharmacotherapeutic regimen. However, grade IV increase in bilirubin was rarely found. In most cases, ATV hyperbilirubinemia appeared to be an innocent phenomenon as far as the risk of a subsequent increase in liver enzyme level is concerned.


Asunto(s)
Alanina Transaminasa/sangre , Fármacos Anti-VIH/efectos adversos , Infecciones por VIH/tratamiento farmacológico , Hiperbilirrubinemia/inducido químicamente , Hígado/efectos de los fármacos , Oligopéptidos/efectos adversos , Piridinas/efectos adversos , Adulto , Alanina Transaminasa/metabolismo , Análisis de Varianza , Terapia Antirretroviral Altamente Activa , Sulfato de Atazanavir , Recuento de Linfocito CD4 , Estudios de Cohortes , Femenino , Infecciones por VIH/complicaciones , Infecciones por VIH/patología , Hepatitis C/complicaciones , Hepatitis C/tratamiento farmacológico , Humanos , Hiperbilirrubinemia/epidemiología , Hiperbilirrubinemia/patología , Hígado/enzimología , Masculino , Análisis Multivariante , Prevalencia , Modelos de Riesgos Proporcionales , Factores de Riesgo , Ritonavir/uso terapéutico , Índice de Severidad de la Enfermedad
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