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Brunna E Alves Silmara AL Montalvao Francisco JP Aranha Irene Lorand-Metze Carmino A De Souza Joyce M Annichino-Bizzacchi Erich V De Paula 《Journal of translational medicine》2011,9(1):23
Background
Septic shock is the most feared complication of chemotherapy-induced febrile neutropenia. So far, there are no robust biomarkers that can stratify patients to the risk of sepsis complications. The VEGF-A axis is involved in the control of microvascular permeability and has been involved in the pathogenesis of conditions associated with endothelial barrier disruption such as sepsis. sFlt-1 is a soluble variant of the VEGF-A receptor VEGFR-1 that acts as a decoy receptor down-regulating the effects of VEGF-A. In animal models of sepsis, sFlt-1 was capable to block the barrier-breaking negative effects of VEGF-A and to significantly decrease mortality. In non-neutropenic patients, sFlt-1 has been shown to be a promising biomarker for sepsis severity. 相似文献994.
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Heart sound is a valuable biosignal for diagnosis of a large set of cardiac diseases. Ambient and physiological noise interference is one of the most usual and highly probable incidents during heart sound acquisition. It tends to change the morphological characteristics of heart sound that may carry important information for heart disease diagnosis. In this paper, we propose a new method applicable in real time to detect ambient and internal body noises manifested in heart sound during acquisition. The algorithm is developed on the basis of the periodic nature of heart sounds and physiologically inspired criteria. A small segment of uncontaminated heart sound exhibiting periodicity in time as well as in the time-frequency domain is first detected and applied as a reference signal in discriminating noise from the sound. The proposed technique has been tested with a database of heart sounds collected from 71 subjects with several types of heart disease inducing several noises during recording. The achieved average sensitivity and specificity are 95.88% and 97.56%, respectively. 相似文献
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von der Weid I Paiva E Nóbrega A van Elsas JD Seldin L 《Research in microbiology》2000,151(5):369-381
Paenibacillus polymyxa populations present in the rhizosphere of maize (cultivar BR-201) planted in Cerrado soil were investigated in order to assess their diversity at four stages of plant growth. A total of 67 strains were isolated and all strains were identified as P. polymyxa by classical biochemical tests, API 50CH tests and a set of species-specific primers based on the 23S rDNA sequence. To compare the isolated strains, phenotypic characteristics (utilization of different carbohydrates, resistance to antibiotics and production of antimicrobial substances) and genetic approaches (hybridization with a Klebsiella pneumoniae nifKDH probe and BOX-PCR) were used. Fermentation of glycerol, arabinose, xylose and rhamnose varied among the isolates and these data divided the strains into five groups. Fifty strains (75%) showed homology to plasmid pSA30 (containing the nifKDH genes) resulting in five different hybridization patterns. Using BOX-PCR, 18 groups were observed. Phenetic analyses were applied based on the unweighted pair group method with arithmetic means using the phenotypic and genetic data, separately. All P. polymyxa isolates could be divided into two main clusters at approximately 52% and into 18 groups at approximately 89% of similarity, when phenotypic data were used. Also, two main clusters were formed at 65% of similarity when genetic data were used. In this dendrogram, clusters were further split into 10 and 22 groups, at about 88 and 97% of similarity, respectively. Finally, all phenotypic and genetic data, or just the genetic data, were used in a multivariate analysis of variance (MANOVA) in order to address the heterogeneity among P. polymyxa populations during the different stages of maize growth. The resulting data showed that strains isolated 10, 30, 60 and 90 days after maize sowing were statistically different. 相似文献
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Rafael Dezen Gaiolla ívison Xavier Duarte Carlos Eduardo Bacchi Carlos Eduardo Paiva 《Case reports in oncology》2014,7(1):260-265
Angiosarcomas are rare aggressive neoplasms of vascular endothelial origin with a high metastatic rate and poor prognosis. Involvement of the bone marrow by the angiosarcoma is exceedingly uncommon, and there have only been a few cases reported in the literature to date. Clinical manifestations and common laboratory findings of bone marrow involvement can mimic other more common bone marrow-replacing neoplasias such as lymphomas and acute leukemia. A definitive diagnosis is difficult to make from cytologic material, probably due to an associated bone marrow fibrosis, and requires bone marrow trephine biopsy with an immunohistochemical profile. Here we had the opportunity to study a case of metastatic angiosarcoma with positive cytologic findings and an unusual presentation that challenged its primary diagnosis.Key words: Angiosarcoma, Bone marrow metastasis, Splenomegaly, Bone marrow cytology 相似文献
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ObjectiveTo evaluate the perception of health-related quality of life (HRQoL) in Portuguese patients with narcolepsy, and to compare the results to normative data.MethodsFifty-one narcoleptic adults (26M, 25F), aged between 18 and 80 years (mean = 43.35, SD = 15.32), were included in the final analysis of a multicentric cross-sectional study. The Medical Outcome Study – 36 Item Short-Form Survey (SF-36) was used to assess quality of life, and the Beck Depression Inventory (BDI) was used for self-assessment of depression.ResultsSeveral HRQoL domains were significantly lower than National surveys, except physical function and bodily pain (p between 0.000 and 0.006). SF-36 presented the lowest score in vitality (39.93). Deterioration was significantly higher in role physical (p = 0.006), vitality (p = 0.011), and mental health (p = 0.008) in women, and in physical function (p = 0.003) and bodily pain (p = 0.045) in elderly subjects. Those with higher literacy had better physical function (p = 0.046).ConclusionHRQoL is significantly deteriorated in narcoleptics, affecting all dimensions (except physical function and bodily pain) when compared with the general Portuguese population. The results are consistent with studies of narcolepsy in other countries in demonstrating the profound impact of this disorder on quality of life. 相似文献
1000.
Barra S Paiva L Providência R Fernandes A Nascimento J Marques AL 《Thrombosis research》2012,130(3):327-333