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排序方式: 共有875条查询结果,搜索用时 15 毫秒
1.
Sourajit M.Mustafi Jaroslaw Harezlak Chandana Kodiweera Jennifer S.Randolph James C.Ford Heather A.Wishart Yu-Chien Wu 《中国神经再生研究》2019,(1)
Multiple sclerosis is a neurodegenerative and inflammatory disease, a hallmark of which is demyelinating lesions in the white matter. We hypothesized that alterations in white matter microstructures can be non-invasively characterized by advanced diffusion magnetic resonance imaging. Seven diffusion metrics were extracted from hybrid diffusion imaging acquisitions via classic diffusion tensor imaging, neurite orientation dispersion and density imaging, and q-space imaging. We investigated the sensitivity of the diffusion metrics in 36 sets of regions of interest in the brain white matter of six female patients(age 52.8 ± 4.3 years) with multiple sclerosis. Each region of interest set included a conventional T2-defined lesion, a matched perilesion area, and normal-appearing white matter. Six patients with multiple sclerosis(n = 5) or clinically isolated syndrome(n = 1) at a mild to moderate disability level were recruited. The patients exhibited microstructural alterations from normal-appearing white matter transitioning to perilesion areas and lesions, consistent with decreased tissue restriction, decreased axonal density, and increased classic diffusion tensor imaging diffusivity. The findings suggest that diffusion compartment modeling and q-spa ce analysis appeared to be sensitive for detecting subtle microstructural alterations between perilesion areas and normal-appearing white matter. 相似文献
2.
Synergistic effect of low dose Cyclosporine A and human interleukin 10 overexpression on acute rejection in rat lung allotransplantation 总被引:3,自引:0,他引:3
Jaroslaw Pierog Amiq Gazdhar Uz Stammberger Matthias Gugger Steven Hyde Iacob Mathiesen Tomasz Grodzki Ralph A. Schmid 《European journal of cardio-thoracic surgery》2005,27(6):1030-1035
Objective: Electroporation mediated transfer of plasmid DNA into peripheral muscle results in high transfection efficiency. The aim of this study was to investigate the effect of gene transfer of human IL-10 (hIL-10) into the tibialis anterior muscle (MTA) in combination with low dose Cyclosporine A (CsA) on acute rejection of lung allografts in the rat. Methods: Lung allotransplantation was performed from male BN donor to male Fisher F344 rats. Gene transfer was achieved by intramuscular injection into the MTA of the recipient followed by electroporation (4×20 ms impulses at 200 V/cm) 24 h prior to the transplantation. Group A (n=5) received CsA (2.5 mg/kg bw ip) for 5 days post-transplant and group B (n=5) 2.5 μg of PCIK hIL-10 (plasmid expression vector containing human CMV immediate early gene promoter and enhancer) and a low dose CsA (2.5 mg/kg bw i.p.). Graft function was assessed by blood gas at day 5 after exclusion of the native lung. Animals were sacrificed and blood was drawn to measure serum hIL-10 levels (ELISA) and tissue was sampled for histological grading of rejection. Results: Local expression of hIL-10 was confirmed at the mRNA level by in situ hybridization. All group A control animals showed severe signs of rejection. At day 5 all grafts in group B showed good gas exchange mean PaO2 233±123 mmHg, vs 44±8 mmHg in group A. Histological examination revealed moderate to severe rejection in all animals in group A (IIIB, ISHLT) in contrast to low moderate rejection in group B (II–IIIA). hIL-10 serum levels on day 5 were 14±7 pg/ml in group B vs. 0 in group A. Conclusions: Electroporation mediated hIL-10 overexpression in a peripheral muscle of the recipient in combination with low dose CsA reduces acute rejection in this model of rat lung allotransplantation. 相似文献
3.
Igor Steiman Jaroslaw P Grod 《The Journal of the Canadian Chiropractic Association》1996,40(3):145-149
A case is presented involving the successful management of symptoms following a sacral fracture. Treatment was primarily comprised of sacroiliac joint manipulation. The importance of accurate diagnosis, realistic risk/benefit assessment, and appropriate treatment is emphasized in considering contraindications of spinal manipulative therapy. 相似文献
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Health-related quality of life parameters as prognostic factors in a nonmetastatic breast cancer population: an international multicenter study. 总被引:4,自引:0,他引:4
Fabio Efficace Patrick Therasse Martine J Piccart Corneel Coens Kristel van Steen Marzena Welnicka-Jaskiewicz Tanja Cufer Jaroslaw Dyczka Michail Lichinitser Lois Shepherd Hanneke de Haes Mirjam A Sprangers Andrew Bottomley 《Journal of clinical oncology》2004,22(16):3381-3388
PURPOSE: The purpose of this research was to evaluate whether baseline health-related quality of life (HRQOL) parameters are prognostic factors for survival in locally advanced breast cancer patients. Although the literature highlights the important role of HRQOL parameters in predicting survival in advanced metastatic disease, little evidence exists for earlier stages. PATIENTS AND METHODS: The overall sample consisted of 448 patients randomly assigned to receive cyclophosphamide, epirubicin, and fluorouracil versus epirubicin, cyclophosphamide, and granulocyte colony-stimulating factor. Patients were enrolled in 12 countries. HRQOL baseline scores were assessed using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire C30. The Cox proportional hazards regression model was used for both univariate and multivariate analyses of survival. In addition, a bootstrap resampling technique was used to assess the stability of the outcomes. Bootstrap results were then applied for model averaging purposes as a means to account for the observed model selection uncertainty. RESULTS: The final multivariate model retained inflammatory breast cancer (T4d) as the only factor predicting overall survival (OS) with a hazard ratio of 1.375 (95% CI, 1.027 to 1.840; P =.03). The presence of inflammatory breast cancer lowers the median survival time from 6.6 to 4.2 years (36% reduction). None of the preselected HRQOL variables were prognostic for OS or disease-free survival, in either the univariate or multivariate analysis. CONCLUSION: Our findings suggest that baseline HRQOL parameters have no prognostic value in a nonmetastatic breast cancer population. 相似文献
7.
Imaging the right heart pulmonary circulation unit: Insights from advanced ultrasound techniques
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Francesco Ferrara MD PhD Luna Gargani MD PhD Ellen Ostenfeld MD Michele D'Alto MD PhD Jaroslaw Kasprzak MD Damien Voilliot MD Christine Selton‐Suty MD Olga Vriz MD Alberto M. Marra MD Paola Argiento MD Anna A. Stanziola MD PhD Antonio Cittadini MD PhD Antonello D'Andrea MD PhD Eduardo Bossone MD PhD 《Echocardiography (Mount Kisco, N.Y.)》2017,34(8):1216-1231
The right heart pulmonary circulation unit (RH‐PCU) is a key determinant of prognosis in several cardiorespiratory diseases. Although right heart catheterization is considered the gold standard for pulmonary hemodynamic assessment, a comprehensive cardiovascular ultrasound approach is an essential step in the diagnostic–prognostic clinical pathway of patients with suspect or overt pulmonary hypertension. The exponential development of advanced ultrasound techniques (strain, 3‐dimensional echocardiography and lung ultrasound) has led to new insights into the evaluation of RH‐PCU structure and function, overcoming some limitations of standard Doppler echocardiography. In the near future, exercise Doppler echocardiography may become a useful technique for detecting a latent stage of pulmonary hypertension and for evaluating right ventricular contractile reserve. 相似文献
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9.
Human cytomegalovirus persists in myeloid progenitors and is passed to the myeloid progeny in a latent form 总被引:9,自引:0,他引:9
Khaiboullina SF Maciejewski JP Crapnell K Spallone PA Dean Stock A Pari GS Zanjani ED Jeor SS 《British journal of haematology》2004,126(3):410-417
CD34+ progenitor cells can harbour latent human cytomegalovirus (HCMV); however, the mechanisms of HCMV latency remain unclear. We have investigated the effects of the haematopoietic lineage restriction on the establishment and spread of the latent HCMV to progeny cells. In vitro-infected and latently-infected haematopoietic progenitor cells derived from HCMV seropositive donors were studied. The presence of HCMV DNA in bone marrow progenitor (BMP) cells was determined by single colony polymerase chain reaction and fluorescent in situ hybridization (FISH). The presence of CMV DNA was found to be restricted to myeloid progenitors and the percentage of HCMV-infected cells was lower in naturally-infected cells than in in vitro-infected cells. Erythroid differentiation resulted in an abortive infection with persistence of the viral nucleic acids in red cell precursors. In BMP cells from HCMV seronegative donors, HCMV DNA was localized in the nucleus. Bone marrow progenitors in the presence of granulocyte-macrophage colony stimulating factor (GMCSF) maintained HCMV DNA for extended periods of time. No viral production could be detected throughout the culture but the comparison of the numbers of latently-infected cells prior to and after the culture suggests that proliferation of haematopoietic progenitor cells may lead to the expansion of latently-infected cells. 相似文献
10.
Regula J Hennig E Burzykowski T Orlowska J Przytulski K Polkowski M Dziurkowska-Marek A Marek T Nowak A Butruk E Ostrowski J 《Digestion》2003,67(1-2):25-31
BACKGROUND: Although Helicobacter pylori is a significant etiologic factor of peptic ulcer disease, it remains unknown why ulcers develop only in the minority of infected individuals. AIM: The aim of this cross-sectional study was to evaluate the association between the presence of duodenal ulcer in H. pylori-infected patients and different risk factors. METHODS: A total of 122 H. pylori-infected patients were enrolled; 79 had duodenal ulcer and 43 gastritis. Univariate analysis was conducted using either Fisher's exact test or exact Cochrane-Armitage trend test. In multivariate analysis the logistic model was used. RESULTS: Univariate analysis indicated six factors (male sex, smoking, antral H. pylori density, CAGA presence in antrum, and VACA s1a presence in antrum and corpus). Four factors (sex, smoking-alcohol index, H. pylori density index, and CAGA index) were found to be significant in multivariate analysis. The best model predicting duodenal ulcer included male sex, smoking, presence of H. PYLORI on histopathology in antrum and CAGA presence in corpus. CONCLUSION: Although several risk factors were significantly associated with duodenal ulcer, we failed in the identification of either a single risk factor or a set of factors that can unequivocally differentiate patients with ulcer from those with gastritis. 相似文献