Time filter

Source Type

Yang J.J.,The 88th Hospital of PLA
Zhonghua jie he he hu xi za zhi = Zhonghua jiehe he huxi zazhi = Chinese journal of tuberculosis and respiratory diseases | Year: 2012

To establish a method (negative enrichment by immunomagnetic beads) for detection of tumor cells in pleural effusions and to evaluate the sensitivity and specificity of the method for clinical application. Five, 10, 20, 50 and 100 A549 (lung adenocarcinoma) cells were labeled with DAPI and added into 20 ml pleural effusions [containing (1 - 10)×10(6)cells] from heart failure patients, followed by immunomagnetic negative enrichment method. Recovered cancer cells were enumerated using a fluorescent microscope. Tumor cells were enriched from pleural effusion samples by means of density gradient centrifugation and negative enrichment by immunomagnetic beads method, followed by identification with cytology analysis (Wright's Giemsa's staining), immunofluorescence staining (IF) and fluorescence in situ hybridization (FISH) using centromere DNA probes of chromosome 7 and 8. Cytology, IF and FISH evaluations were performed in 53 pleural effusion samples, including 36 cases of malignant disease (25 male and 11 female patients aging 40 to 78 years, mean age (63 ± 9) and 17 cases of benign disease (8 male and 9 female patients aging 25 to 81 years, mean age (53 ± 18). After DAPI staining and mixing with pleural effusions from heart failure patients, the cell recovery rates of A549 cells evaluated under fluorescence microscope were 75%, 78%, 82%, 85%, 88%, and the average recovery rate was 81.6%. Using negative enrichment method and density gradient centrifugation combined with cytology analysis, the positive rates of tumor cells in 36 malignant pleural effusion samples were 81% (29/36) and 61% (22/36), respectively (χ(2) = 4.00, P = 0.039). Using negative enrichment method combined with IF, the positive rate of CK18(+), DAPI(+), CD(45)(-) cells was 100%. Moreover, using negative enrichment method combined with FISH analysis, the positive rate of tumor cells was 86% (31/36), much higher than that using density gradient centrifugation combined with cytology analysis (χ(2) = 5.818, P = 0.012). In 17 cases of benign pleural effusions, using negative enrichment method combined with IF, the positive rate was 100%. But other methods didn't find cancer cells from benign pleural effusions. It was applicable to enrich tumor cells from pleural effusions using negative enrichment method by immunomagnetic beads. This method combined with cytology analysis or FISH significantly enhanced the sensitivity and specificity of tumor cell detection in pleural effusions. But it was difficult to distinguish cancer cells from mesothelial cells using immunofluorescence staining with CK18, DAPI and CD(45) label. More specific markers were needed to recognize tumor cells from pleural effusions. Source

Wang X.,Beijing Institute of Transfusion Medicine | Li Y.,Beijing Institute of Transfusion Medicine | Wang H.,The 88th Hospital of PLA | Fu Q.,Beijing Institute of Transfusion Medicine | And 5 more authors.
Biosensors and Bioelectronics | Year: 2010

A novel gold nanorods (GNRs) biosensor based on the localized surface plasmon resonance (LSPR) behavior was designed to detect the hepatitis B surface antigen (HBsAg) which indicates active viral replication of hepatitis B virus (HBV). The surface of GNRs was modified with monoclonal hepatitis B surface antibody (HBsAb) through physical adsorption. Raman spectrum, dynamic light scattering (DLS) and zeta potential measurement were conducted to access the nature of the GNRs after antibody modification. The binding of analyte to the molecular probe was monitored by the longitudinal wavelength shift of LSPR peak in the UV-Vis extinction spectrum resulting from the changes of local refractive index induced by the immunological reaction. The biosensor could be utilized in quantitative analysis in Tris buffers, which has dose-dependence response ranging from 0.01. IU/mL to 1. IU/mL. Further, the biosensor was suited for qualitative analysis of HBsAg in the actual media of blood serum and plasma. The ease of operation, high sensitivity, and its generality offer specific advantages over other GNRs-based immunoassay methods. © 2010 Elsevier B.V. Source

Zheng Q.,Sun Yat Sen University | Zong Y.,Sun Yat Sen University | Li L.,The 88th Hospital of PLA | Huang X.,Sun Yat Sen University | And 6 more authors.
Ophthalmic and Physiological Optics | Year: 2015

Purpose: To investigate changes in retinal vessel oxygen saturation and diameter in high myopia. Methods: Relative oxygen saturation was measured in the retinal blood vessels of 54 participants with high myopia and compared to a control group of 54 individuals with emmetropia with the Oxymap T1 retinal oximeter. The participants with high myopia were further divided into two groups according to the grade of myopic retinopathy: Group A (grade < M2) and Group B (grade ≥ M2). One-way anova was used to analyse the mean saturation and diameter of retinal arterioles and venules and the mean difference in arterio-venous saturation among the four groups. Further analysis of multiple comparisons was performed with the Bonferroni test. Linear regression was used to analyse the correlation of ocular perfusion pressure or best corrected visual acuity with other variables. Results: For all of the high myopia patients, retinal arteriole saturation (92.3 ± 5.6%) and the difference in arterio-venous saturation (30.8 ± 5.0%) were significantly lower than in normal individuals (96.0 ± 5.8%, 35.4 ± 6.2%; p = 0.006, p < 0.001, respectively). In Group A, only the difference in arterio-venous saturation (31.0 ± 4.7%) was significantly lower than in the control group (p = 0.011). In Group B, retinal arteriole saturation (92.2 ± 5.3%) and the difference in arterio-venous saturation (30.7 ± 5.3%) were also lower than the control group (p = 0.02, p = 0.001, respectively). Both retinal arteriole diameter and retinal venule diameter were narrower than in participants with high myopia than the control group (p < 0.001). No statistically significant correlations were found between ocular perfusion pressure or best corrected visual acuity with any other variables. Conclusions: The study demonstrated decreased retinal arteriole saturation and decreased difference in arterio-venous saturation as well as narrowing retinal vessel diameter in highly myopic eyes. Further studies are needed to determine if such changes play a role in the development of high myopia and its complications or occur as a consequence of tissue remodelling during axial elongation. The Authors Ophthalmic & Physiological Optics © 2015. Source

Zhang S.J.,Shandong University | Wu Z.Z.,The 88th Hospital of PLA
Genetics and Molecular Research | Year: 2016

This study was designed to determine whether polymorphisms in the gene wingless-type MMTV integration site family, member 10A (WNT10A) are associated with non-syndromic hypodontia (tooth agenesis). A case-control study was performed involving 129 subjects with sporadic non-syndromic hypodontia (cases) and 218 healthy individuals (controls). DNA was obtained from whole blood and the ligase detection reaction method was used to analyze two single nucleotide polymorphisms (SNPs) of the WNT10A gene. A significant difference between cases and controls was observed in the allele and genotype frequencies of both SNPs (rs116998555 and rs147680216). For rs116998555, the presence of the T allele (the thymine variant) was associated with tooth agenesis [odds ratio (OR) = 5.722; 95% confidence interval (CI) = 3.053-10.727; P < 0.001], while for rs147680216, the A allele (the adenine variant) correlated with this condition (OR = 2.665; 95%CI = 1.512-4.695; P < 0.001). We provide here the first case-control study evidence that risk of hypodontia may be related to the WNT10A polymorphism. Our results also confirm the importance of the Wnt pathway in tooth development. © FUNPEC-RP. Source

Gao X.,Soochow University of China | Zhang J.,The 88th Hospital of PLA | Peng Y.,Soochow University of China | Fan H.,The 88th Hospital of PLA | And 3 more authors.
Journal of Biomedical Research | Year: 2012

The purpose of the present study was to investigate the association between admission clinical characteristics and outcomes at discharge among acute ischemic stroke patients in the Chinese population. A total of 2,673 patients with acute ischemic stroke were included in the present study. The clinical characteristics at admission and other study variables were collected for all patients. The study outcome was defined as neurological deficiency (National Institute of Health Stroke Scale score ≥ 10) at discharge or in-hospital death. Compared with the sub-jects without neurological deficiency at discharge or in-hospital death, the subjects with neurological deficiency at discharge or in-hospital death had a significantly higher prevalence of hyperglycemia or history of atrial fibrillation at admission. Age ≥ 80 years, hyperglycemia, hypertension, and history of atrial fibrillation were significantly associated with neurological deficiency at discharge or in-hospital death after adjustment for other variables. It is concluded that old age (≥ 80 years), hyperglycemia, hypertension and history of atrial fibrillation are sig-nificantly associated with neurological deficiency at discharge or in-hospital death among patients with acute ischemic stroke. © 2012 The Editorial Board of Journal of Biomedical Research. Source

Discover hidden collaborations