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Shao D.,Guangdong Academy of Medical science | Wang S.-X.,Guangdong Academy of Medical science | Liang C.-H.,Guangdong Academy of Medical science | Gao Q.,First Peoples Hospital of Foshan
Journal of Nuclear Cardiology | Year: 2011

Objective: To assess the feasibility of 18F-FDG PET-CT for the differentiation of malignancy from benign lesions of the heart and the pericardium. Methods: A total of 23 cases (malignancy:benign = 13:10) with cardiac and pericardial lesions, confirmed by pathology or on clinical grounds, were analyzed in this study. All lesions were evaluated semi-quantitatively using maximum standard uptake values (SUV max) and SUV max lesion/blood, and the density of the heart and pericardium lesions and the relation with surrounding tissues were evaluated. The differences of SUV max and SUV max lesion/blood between benign and malignant lesions were analyzed by the Mann-Whitney test. Subsequently, the diagnostic sensitivity, specificity, accuracy, positive predictive value (PPV), and negative predictive value (NPV) were calculated for CT and PET-CT, respectively. Results: The maximum SUV showed significant difference between malignancy (avg ± SD 6.5) and benign (avg ± SD 1.5) (Z = -3.601, P < .01), the SUV max lesion/blood of malignancy and benign were avg ± SD 3.4 and avg ± SD 0.9, respectively, also with a significant difference (Z = -3.600, P < .01). In this pilot study, the optimal cutoff value to separate benign vs malignant lesions of SUV max was 3.5-4.0 and the cutoff for SUV max lesion/blood was 1.3-2.0. The sensitivity, specificity, accuracy, PPV, and NPV of CT and PET-CT were 76.9%(10/13), 100.0%(10/10), 87.0%(20/23), 100.0%(10/10), 76.9%(10/13) and 100.0%(13/13), 90.0%(9/10), 95.7%(22/23), 92.9%(13/14), 100.0%(9/9), respectively. Conclusion: 18F-FDG PET-CT appears promising for correctly differentiating benign vs malignant cardiac and pericardial lesions. © 2011 American Society of Nuclear Cardiology. Source

Zhao W.,First Peoples Hospital of Foshan | Zhao W.,Sun Yat Sen University | Zhou S.,Sun Yat Sen University | Yao W.,Sun Yat Sen University | And 4 more authors.
Life Sciences | Year: 2014

Aims Both mast cells and oxidative stress are involved in acute lung injury (ALI) induced by intestinal ischemia-reperfusion (IIR). The aim of this study was to investigate whether propofol could improve IIR-induced ALI through inhibiting their interaction. Main methods Repetitive, brief IIR or IIR + compound 48/80 was performed in adult Sprague-Dawley rats pretreated with saline, apocynin or propofol. And their lungs were excised for histology, ELISA and protein-expression measurements 2 h after reperfusion. Key findings Rats pretreated with saline developed critical ALI 2 h after IIR. We found significant elevations in lung injury scores, lung wet/dry ratio and gp91phox, p47phox, intercellular cell adhesion molecule-1 protein expressions and higher level of malondialdehyde, interleukin-6 contents, and myeloperoxidase activities, as well as significant reductions in superoxide dismutase activities, accompanied with increases in mast cell degranulation evidenced by significant increases in mast cell counts, β-hexosaminidase concentrations, and tryptase expression. And the lung injury was aggravated in the presence of compound 48/80. However, pretreated with propofol and apocynin not only ameliorated the IIR-mediated pulmonary changes beyond the biochemical changes but also reversed the changes that were aggravated by compound 48/80. Significance Propofol protects against IIR-mediated ALI, most likely by inhibiting the interaction between oxidative stress and mast cell degranulation. © 2014 Elsevier Inc. Source

Zhang P.-F.,Southern Medical University | Pan L.,Sanshui Hospital of Foshan | Luo Z.-Y.,First Peoples Hospital of Foshan | Zhao H.-J.,Southern Medical University | Cai S.-X.,Southern Medical University
COPD: Journal of Chronic Obstructive Pulmonary Disease | Year: 2013

Previous studies have shown that matrix metalloproteinase-9 (MMP-9) and its cognate inhibitor TIMP-1, inflammatory cytokine TNF-α, and the OPG/RANK/RANKL system may each play individual roles in the pathogenesis of osteoporosis in patients with COPD. In the present study, we investigated the interrelationships of these factors in male COPD patients with and without osteoporosis. The serum levels of MMP-9, MMP-9/TIMP-1 ratio, TNF-α, RANKL, OPG, and the RANKL/OPG ratio were higher in COPD patients with osteoporosis than in individuals with normal or low bone mineral density (BMD) (N = 30, all P < 0.05 or < 0.01). The lung function FEV1%Pre and the BMD of the lumbar spine and femoral neck were found to be negatively correlated with MMP-9 serum level (r = -0.36, P < 0.05, r = -0.58, P < 0.001, and r = -0.62, P < 0.01, respectively), RANKL serum level (r = -0.21, P < 0.05, and r = -0.25, P < 0.05, and r = -0.26, P < 0.05, respectively), and RANKL/OPG ratio (r = -0.23, P < 0.05, r = -0.33, P < 0.05, and r = -0.38, P < 0.05, respectively). However, they had no correlation with TIMP-1, TNF-α, OPG, or RANK. The MMP-9 serum level was found to be positively correlated with TNF-α level (r = 0.35, P < 0.05) and RANKL/OPG ratio (r = 0.27, P < 0.05) but not associated with RANKL. These results suggest that MMP-9, TNF-α, and the OPG/RANK/RANKL system may be closely interrelated and may play interactive roles in pathogenesis of osteoporosis in COPD. © 2013 Informa Healthcare USA, Inc. Source

Chen L.,Sun Yat Sen University | Xu Y.,Sun Yat Sen University | Zhao J.,Sun Yat Sen University | Zhang Z.,Sun Yat Sen University | And 4 more authors.
PLoS ONE | Year: 2014

Growing evidence indicates that bone marrow-derived mesenchymal stem cells (BM-MSCs) enhance wound repair via paracrine. Because the extent of environmental oxygenation affects the innate characteristics of BM-MSCs, including their stemness and migration capacity, the current study set out to elucidate and compare the impact of normoxic and hypoxic cell-culture conditions on the expression and secretion of BM-MSC-derived paracrine molecules (e.g., cytokines, growth factors and chemokines) that hypothetically contribute to cutaneous wound healing in vivo. Semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA) analyses of normoxic and hypoxic BM-MSCs and their conditioned medium fractions showed that the stem cells expressed and secreted significantly higher amounts of basic fibroblast growth factor (bFGF),vascular endothelial growth factor A (VEGF-A) interleukin 6 (IL-6) and interleukin 8 (IL-8) under hypoxic conditions. Moreover, hypoxic BM-MSC-derived conditioned medium (hypoCM) vs. normoxic BM-MSC-derived conditioned medium (norCM) or vehicle control medium significantly enhanced the proliferation of keratinocytes, fibroblasts and endothelial cells, the migration of keratinocytes, fibroblasts, endothelial cells and monocytes, and the formation of tubular structures by endothelial cells cultured on Matrigel matrix. Consistent with these in vitro results, skin wound contraction was significantly accelerated in Balb/c nude mice treated with topical hypoCM relative to norCM or the vehicle control. Notably increased in vivo cell proliferation, neovascularization as well as recruitment of inflammatory macrophages and evidently decreased collagen I, and collagen III were also found in the hypoCM-treated group. These findings suggest that BM-MSCs promote murine skin wound healing via hypoxia-enhanced paracrine. © 2014 Chen et al. Source

Hu W.W.,First Peoples Hospital of Foshan
Nan fang yi ke da xue xue bao = Journal of Southern Medical University | Year: 2010

To evaluate the value of the detection of a 4-marker (ER, VIM, CEA and p16) panel in the differential diagnosis of primary endocervical and endometrial adenocarcinomas. Immunohistochemical EnVison method was used to detect the expressions of ER, VIM, CEA and p16 in paraffin-embedded tissues from 31 cases of primary endocervical adenocarcinomas and 30 cases of endometrial adenocarcinomas. The specificity, sensitivity, predictive value and accuracy were compared between the 4-marker and 3-marker (ER, VIM and CEA) panels. The positivity rates of ER, VIM, CEA and p16 in endocervical adenocarcinomas were 35.5%, 19.4%, 77.4% and 67.7%, respectively; those in endometrial adenocarcinomas were 70%, 73.3%, 40% and 13.3%, respectively, showing significant frequency differences (P<0.05) between primary endocervical and endometrial adenocarcinomas. The specificity, sensitivity, positive predictive value and accuracy of the 4-marker panel in endocervical adenocarcinomas were significantly higher than those of the 3-marker panel (96.3% vs 90.2%, 65.1% vs 57.6%, 94.9% vs 89.4%, and 85.8% vs 80.6%, respectively). These values were almost similar for both panels in endometrial carcinoma except for better negative predictive value and accuracy value with the 4-marker panel (58.7% vs 51.9% and 75.4% vs 68.6%, respectively). Adding the p16 marker to the traditional 3-marker panel may have significant clinical importance in the differential diagnosis of primary endocervical and endometrial adenocarcinomas to improve the diagnostic accuracy, although there is only a slight increase in the diagnostic sensitivity. Source

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