Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Mais filtros

Base de dados
Tipo de estudo
Intervalo de ano de publicação
Radiol Case Rep ; 17(3): 832-842, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35035648


Takayasu arteritis (TA) is a common autoimmune disease in the clinical setting. However, vertebral artery aneurysms caused by TA are rarely reported. We herein describe a 28-year-old man with multiple vertebral artery aneurysms and carotid artery aneurysms caused by TA, which showed typical wall thickening and lumen dilation with a "string of beads" appearance by Doppler ultrasound and radiology. Previous studies have shown that most TA-associated vertebral artery lesions are stenosis, occlusion, and dissection of the intracranial part of the artery. In this case, TA mainly affected the cervical segment of the vertebral artery (the intracranial segment was not obviously involved), and the main manifestations were aneurysms and occlusion. This case provides more information for further understanding of TA-associated vertebral artery lesions.

Tex Heart Inst J ; 42(4): 319-26, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26413013


We sought to validate the hypothesis that the development of atherosclerosis can be suppressed by the interleukin-1 receptor antagonist (IL-1Ra) in murine models of atherosclerosis in vivo, noninvasively seen by means of high-resolution ultrasound biomicroscopy, and we studied changes in inflammatory markers such as IL-1 and C-reactive protein (CRP) plasma levels in these models of atherosclerosis. We divided IL-1Ra(+/-)/apolipoprotein-E (apoE)(-/-) and IL-1Ra(+/+)/apoE(-/-) mice into 2 age groups, used as atherosclerotic models. The control groups were age-matched IL-1Ra(+/+)/apoE(+/+) mice. Plaque thickness was measured in the ascending aorta in short-axis images by means of ultrasound and histology. Plasma levels of IL-1 and CRP were quantified in the 3 murine groups. At 16 weeks, plaque thickness in the ascending aortas of the IL-1Ra(+/-)/apoE(-/-) mice was significantly greater than that in the IL-1Ra(+/+)/apoE(-/-) mice, on ultrasound and histology (P <0.01). In contrast, at 32 weeks, the differences between these 2 genotypes were not statistically significant. Serum IL-1 levels were lower in the IL-1Ra(+/-)/apoE(-/-) mice than in the IL-1Ra(+/+)/apoE(-/-) mice at 16 and 32 weeks (P <0.05). At 16 weeks, serum CRP levels in the IL-1Ra(+/-)/apoE(-/-) mice were higher than in the IL-1Ra(+/+)/apoE(-/-) mice (P <0.01). Our results suggest that ultrasound biomicroscopy enables evaluation of atherosclerotic lesions in vivo, noninvasively and in real-time, in apoE(-/-) mice. Partial IL-1Ra deficiencies might promote early plaque development in 16-week-old apoE(-/-) mice. The balance of IL-1 and IL-1Ra might influence atherosclerotic development. Finally, CRP might affect the initiation of atherosclerosis, rather than its progression.

Aorta/diagnóstico por imagem , Aorta/metabolismo , Doenças da Aorta/prevenção & controle , Apolipoproteínas E/deficiência , Aterosclerose/prevenção & controle , Mediadores da Inflamação/sangue , Inflamação/prevenção & controle , Proteína Antagonista do Receptor de Interleucina 1/metabolismo , Microscopia Acústica , Animais , Doenças da Aorta/sangue , Doenças da Aorta/diagnóstico por imagem , Doenças da Aorta/genética , Apolipoproteínas E/genética , Aterosclerose/sangue , Aterosclerose/diagnóstico por imagem , Aterosclerose/genética , Proteína C-Reativa/metabolismo , Modelos Animais de Doenças , Predisposição Genética para Doença , Inflamação/sangue , Inflamação/diagnóstico por imagem , Inflamação/genética , Proteína Antagonista do Receptor de Interleucina 1/deficiência , Proteína Antagonista do Receptor de Interleucina 1/genética , Interleucina-1/sangue , Lipídeos/sangue , Masculino , Camundongos Knockout , Placa Aterosclerótica
Ultrasound Med Biol ; 39(11): 2044-52, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23993171


Ultrasound bio-microscopy was used to measure hemodynamic changes in the left main coronary artery after myocardial infarction (MI), and its usefulness in estimating infarct size was evaluated. MI was induced by left anterior descending artery ligation. Diastolic peak velocity (Vd), mean flow velocity (Vmean) and the velocity-time integral (VTI) were measured 2 and 6 h after MI. Serum troponin I levels were assayed 2, 6 and 12 h after MI. At 2 h, Vmean and VTI significantly differed between mice that underwent low and high left anterior descending artery ligation; Vd, Vmean and VTI were correlated with infarct size (r = -0.557, -0.693 and -0.672, respectively; all p < 0.01). Infarct size was more strongly correlated with 2-h ultrasound bio-microscopy measurements than with 2-h serum troponin I level. Measurement of coronary artery blood flow by ultrasound bio-microscopy may be useful for early estimation of infarct size in mice.

Circulação Coronária , Interpretação de Imagem Assistida por Computador/métodos , Microscopia Acústica/métodos , Infarto do Miocárdio/diagnóstico por imagem , Infarto do Miocárdio/fisiopatologia , Animais , Velocidade do Fluxo Sanguíneo , Modelos Animais de Doenças , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Reprodutibilidade dos Testes , Sensibilidade e Especificidade