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991.
Ver?nica R S Fernandes Joseph F Polak Thor Edvardsen Benilton Carvalho Antoinette Gomes David A Bluemke Khurram Nasir Daniel H O'Leary Jo?o A C Lima 《Journal of the American College of Cardiology》2006,47(12):2420-2428
OBJECTIVES: This study sought to determine whether increased carotid intima-media thickness (IMT) is related to reduced regional myocardial function in participants of the Multi-Ethnic Study of Atherosclerosis (MESA). BACKGROUND: Carotid artery IMT is an established index of subclinical atherosclerosis, and tagged magnetic resonance imaging (MRI) can detect incipient alterations of segmental function that precede overt myocardial failure. METHODS: The MESA study is a prospective observational study including four ethnic groups free from clinical cardiovascular disease. Peak midwall systolic circumferential strain (ECC) and regional strain rates were calculated by harmonic phase from tagged MRI data of 500 participants. Systolic ECC and diastolic strain rate were regressed on IMT of the common carotid artery defined by ultrasound, with adjustments for body mass index, blood pressure, cholesterol, diabetes, smoking, left ventricular hypertrophy, C-reactive protein, age, and gender. RESULTS: The mean participant age was 66 +/- 10 years (mean +/- SD). Among the 58 participants, 4% were male and the interquartile (25th to 75th percentile) range for IMT was 0.25 mm. Multiple linear regression analyses showed that increased IMT was related to reduced systolic regional function (less shortening ECC) in all myocardial regions (p < 0.05), except in the inferior wall. The analyses also showed that greater IMT was associated with a lower diastolic strain rate (diastolic reduced function) in all regions (p < 0.01), except in the anterior wall. CONCLUSIONS: Greater carotid IMT is associated with alterations of myocardial strain parameters reflecting reduced systolic and diastolic myocardial function. These observations indicate a relationship between subclinical atherosclerosis and incipient myocardial dysfunction in a population free of clinical heart disease. 相似文献
992.
Characterization of a new subpopulation of mouse CD8alpha+ B220+ dendritic cells endowed with type 1 interferon production capacity and tolerogenic potential 总被引:10,自引:2,他引:10
Martín P Del Hoyo GM Anjuère F Arias CF Vargas HH Fernández-L A Parrillas V Ardavín C 《Blood》2002,100(2):383-390
We describe a new B220+ subpopulation of immaturelike dendritic cells (B220+ DCs) with low levels of expression of major histocompatibility complex (MHC) and costimulatory molecules and markedly reduced T-cell stimulatory potential, located in the thymus, bone marrow, spleen, and lymph nodes. B220+ DCs display ultrastructural characteristics resembling those of human plasmacytoid cells and accordingly produce interferon-alpha after virus stimulation. B220+ DCs acquired a strong antigen-presenting cell capacity on incubation with CpG oligodeoxynucleotides, concomitant with a remarkable up-regulation of MHC and costimulatory molecules and the production of interleukin-12 (IL-12) and IL-10. Importantly, our data suggest that nonstimulated B220+ DCs represent a subset of physiological tolerogenic DCs endowed with the capacity to induce a nonanergic state of T-cell unresponsiveness, involving the differentiation of T regulatory cells capable of suppressing antigen-specific T-cell proliferation. In conclusion, our data support the hypothesis that B220+ DCs represent a lymphoid organ subset of immature DCs with a dual role in the immune system-exerting a tolerogenic function in steady state but differentiating on microbial stimulation into potent antigen-presenting cells with type 1 interferon production capacity. 相似文献
993.
Pâmella Recco Álvares José Alcides Almeida de Arruda Leni Verônica Oliveira Silva Leorik Pereira da Silva George João Ferreira do Nascimento Marcia Maria Fonseca da Silveira Ana Paula Veras Sobral 《Journal of endodontics》2018,44(12):1783-1787
Introduction
The purpose of this study was to evaluate the expression of cyclooxygenase-2 (COX-2) and tumor necrosis factor alpha (TNF-α) in periapical granuloma (PG) and radicular cyst (RC) samples and to correlate it with the type of lesion, the intensity of the inflammatory infiltrate, and the thickness of the epithelial lining.Methods
A total of 51 cases of periapical lesions (25 PGs and 26 RCs) were subjected to morphologic analysis and immunohistochemical study. The anti–COX-2 and anti–TNF-α antibodies were applied using the immunoperoxidase technique. Data were analyzed by the Mann-Whitney test, Pearson chi-square test, Fisher exact test, and Spearman correlation.Results
Analysis of the inflammatory infiltrate revealed that 80% of PGs exhibited a grade III infiltrate as opposed to a 19% rate in RCs (P < .001). Morphologic evaluation of the epithelial thickness of RCs revealed the presence of atrophic epithelium in 73% of cases. The majority of PGs had a score of 1 for COX-2 immunoexpression (n = 14, 54%) and a score of 2 for TNF-α expression (n = 16, 64%), whereas in cases of RCs a score of 1 was more prevalent for COX-2 and TNF-α expression (n = 17, 65%). Significant differences in the expression scores of COX-2 and TNF-α were detected in periapical lesions (P < .001).Conclusions
Based on these findings, we emphasize that RCs and PGs have a similar expression of inflammatory mediators (COX-2 and TNF-α) although the secretion of TNF-α by macrophages and of COX-2 by several cells was higher in PGs, indicating a greater inflammatory response in these lesions. 相似文献994.
Ester Manzanera Paula Llorca David Manzanera Verónica García-Sanz Vicente Sada Vanessa Paredes-Gallardo 《Oral Radiology》2018,34(1):56-65
Objectives
To examine the dimensions (width, length, and height) of the maxillary tuberosity (MT) and their correlations with age and sex, and to identify different anatomical types for adequate positioning of miniscrews in this area.Methods
The study enrolled 39 patients attending the University of Valencia. The patients comprised 21 males and 18 females with a mean age of 39.7 ± 8.4 years. The dimensions of all 78 MTs were measured on cone beam computed tomography (CBCT) images using Invivo Dental 5 software.Results
The intraobserver and interobserver errors were good for all measurements. A total of 858 MT measurements were taken. The widths were greater in men than in women, with significant differences. The MT dimensions showed correlations with patient age, whereby older patients presented with greater widths and lengths, but reduced heights. Three different anatomical types were detected according to patient age.Conclusions
The dimensions (width, length, and height) of the MT vary according to patient age and sex. The MT dimensions conform to particular anatomical types, which should be taken into account when placing miniscrews in this region.995.
996.
Justin Mastroianni Verónica I. Dumit Marie Follo Annette Hasenburg Martin Köhler Heide Dierbach Sebastian Herzog Amelie Proske Martin Werner Joern Dengjel Robert Zeiser 《International journal of cancer. Journal international du cancer》2015,136(10):2328-2340
Metastatic ovarian cancer has a dismal prognosis and current chemotherapeutic approaches have very limited success. Metadherin (MTDH) is expressed in human ovarian cancer tissue and its expression inversely correlates with patients overall survival. Consistent with these studies, we observed MTDH expression in tissue specimens of FIGO Stage III ovarian carcinomas (72/83 cases). However, we also observed this in normal human ovarian epithelial (OE) cells, which raised the question of whether MTDH‐variants with functional differences exist. We identified a novel MTDH exon 11 skipping variant (MTDHdel) which was seen at higher levels in ovarian cancer compared to benign OE cells. We analyzed MTDH‐binding partner interactions and found that 12 members of the small ribosomal subunit and several mRNA binding proteins bound stronger to MTDHdel than to wildtype MTDH which indicates differential effects on gene translation. Knockdown of MTDH in ovarian cancer cells reduced the amount of distant metastases and improved the survival of ovarian cancer‐bearing mice. Selective overexpression of the MTDHdel enhanced murine and human ovarian cancer progression and caused a malignant phenotype in originally benign human OE cells. MTDHdel was detectable in microdissected ovarian cancer cells of some human tissue specimens of ovarian carcinomas. In summary, we have identified a novel MTDH exon 11 skipping variant that shows enhanced binding to small ribosomal subunit members and that caused reduced overall survival of ovarian cancer bearing mice. Based on the findings in the murine system and in human tissues, MTDHdel must be considered a major promalignant factor for ovarian cancer. 相似文献
997.
Adriana?de?Aquino-Guerrero Tania?Raymundo-Ojeda Enriqueta?F.?Amora-Lazcano Mari?Carmen?Acoltzi-Conde Aída?Verónica?Rodríguez?Tovar Ricardo?Valenzuela-Garza Leonor?Angélica?Guerrero-Zú?iga Angélica?Rodríguez-DorantesEmail author 《Proceedings of the National Academy of Sciences, India. Section B.》2018,88(4):1377-1387
In forest ecosystems, ectomycorrhizal symbiosis is able to produce a large range of extracellular and cell wall-bound enzymes which hydrolyze compounds contained in soil organic matter. Enzymatic activity profiles of individual ectomycorrhiza have value of functional traits to characterize the diversity of ectomycorrhizal (ECM) communities. Fagus mexicana is an endemic and only species that has restricted distribution to cloud forest of Sierra Madre Oriental in México and there are few works focused to the relationship between this forest species and ectomycorrhizal, which enhance its growth and development. This work analyzes the enzyme functional diversity of ectomycorrhizal fungi associated to F. mexicana trees of different ages. In this study, the ECM species: Cantharellus cibarius Fr., Laccaria amethystina Cook, Lactarius subdulcis (Pers.) gray and Xathoconium separans (Peck) Halling & Both, were founded near these trees and the influence of the niche on the mean catabolic activity of ectomycorrhizal community, varied according to the dominant substrate; where L. amethystina and X. separans presented the highest β-glucosidase and acid phosphatase activities in F. mexicana tips. The enzymatic profiles demonstrated a functional plasticity of the ectomycorrhizal species associated to the age of trees tested and also could be a trait of their capability of adaptation to the cloud forest ecosystem. 相似文献
998.
Mariana Hoffman Marcella G. Assis Valéria Maria Augusto Bruna Mara F. Silveira Verônica F. Parreira 《Revista brasileira de fisioterapia (S?o Carlos (S?o Paulo, Brazil))》2018,22(3):215-221
Background
Advanced lung disease is a chronic non-neoplastic disease that compromises activities of daily living. Treatment includes pulmonary rehabilitation and inspiratory muscle training. Studies have shown the effectiveness of inspiratory muscle training in lung disease patients, but literature is scarce on the patients’ perceptions about this topic.Objective
To explore the perceptions of patients with advanced lung disease about inspiratory muscle training.Methods
Qualitative study. Interviews were conducted using a semi-structured questionnaire regarding topics on the participation of patients in inspiratory muscle training and on daily activities performed before and after training. Interviews were transcribed and analyzed according to thematic content analysis.Results
Ten patients (eight women and 2 men, ranging in age from 27 to 89 years) with inspiratory muscle weakness (maximal inspiratory pressure = 44 ± 13.9 cmH2O) were included. Five patients were diagnosed with Chronic Obstructive Pulmonary Disease, two with bronchiectasis and three with pulmonary fibrosis. All patients completed at least 80% of the total training sessions. The reports were grouped into four thematic categories: (1) impact of inspiratory muscle training on breathlessness (e.g., “I wasn’t feeling as tired as I previously felt.”); (2) change in daily activities (e.g., “I needed to go to the supermarket, I felt less tired doing it.”); (3) improved mobility (e.g., “I could not stand for long periods […] walking, for example […] Now I stand more, I have more capability.”); and (4) increased communication (e.g., “More power, right? Even in speaking […] When I could, I felt my voice coming out better.”).Conclusion
There were improvements in breathlessness, daily activities, mobility, and communication, which positively affected the psychological and social aspects of the patients. 相似文献999.
Susan Martins Lage Raquel Rodrigues Britto Daniella Cunha Brandão Danielle Aparecida Gomes Pereira Armèle Dornelas de Andrade Verônica Franco Parreira 《Revista brasileira de fisioterapia (S?o Carlos (S?o Paulo, Brazil))》2018,22(6):452-458
Background
Some inspiratory muscle training protocols for patients with heart failure report the request of diaphragmatic breathing during inspiratory loaded breathing. However, it is unclear whether this condition modifies the chest wall volumes.Objective
The primary purpose was to evaluate chest wall volumes during inspiratory loaded breathing as well as during inspiratory loaded breathing associated with diaphragmatic breathing in patients with heart failure.Methods
Sixteen men with heart failure functional class I to III, aged 50(SD = 7) years were evaluated. Volumes of the pulmonary rib cage, abdominal rib cage and abdomen, as well as other breathing pattern variables, were assessed by optoelectronic plethysmography during quiet breathing, inspiratory loaded breathing, and inspiratory loaded breathing associated with diaphragmatic breathing.Results
Chest wall tidal volume significantly increased from quiet breathing 0.53(SD = 0.14)L to inspiratory loaded breathing 1.33(SD = 0.48)L and to inspiratory loaded breathing associated with diaphragmatic breathing 1.36(SD = 0.48)L. A significant volume variation was observed on the three compartments (p < 0.05 for all). During inspiratory loaded breathing associated with diaphragmatic breathing, patients showed increased abdominal volume compared to quiet breathing [0.28(SD = 0.05) to 0.83(SD = 0.47)L, p < 0.001]; as well as from inspiratory loaded breathing [0.63(SD = 0.23) to 0.83(SD = 0.47)L, p = 0.044]. No significant changes were observed between the two inspiratory loaded breathing conditions on the percentages of the contribution of each chest wall compartment for the tidal volume, respiratory rate, minute ventilation, and duty cycle.Conclusion
When inspiratory loaded breathing was associated with diaphragmatic breathing, a higher volume in the abdominal compartment was obtained without significant changes in other breathing pattern variables. 相似文献1000.
María Esther Rubio-Ruiz Israel Pérez-Torres Eulises Diaz-Diaz Natalia Pavón Verónica Guarner-Lans 《Acta pharmacologica Sinica》2014,35(11):1364-1374