Objective To determine whether intermittence irradiation of single blue or white light have an adverse effect on the DNA of newborn infants with hyperbilirubinemia by examining the sister chromatid exchange(SCE)frequency of peripheral blood lymphocytes.Methods The frequency of SCE in lymphocytes of 40 icteric infants treated by different phototherapy(PT) methods was a nalyzed by sister chromatid differetance staining technique (SCD).The patients receiving PT were divided into three groups according to two methods of PT,group A:single blue light,20 cases; group B:single white light,20 cases.Results 1.In group A, there was no difference between the levels of SCE before and after therapy within 3 days;but after 4 days, the levels of SCE increased.2.Obvious changes were observed in group B,and the frequency of SCE increased after 1 day and increased significantly in a dose-dependant manner.3.After treatment, the SCE frequency of group B was higher than that of group A.Conclusions PT has mutagenic effect on newborns with hyperbilirubinemia. The effect of single white light on peripheral blood lymphocytes of neonates is more significant.

AIMTo establish a HSP90 highly expressing cell line and study the effect of high level of HSP90 on cell stress response.

METHODSThe recombined plasmid pSmycHSP, which contained the full length DNA coding for human HSP90 B, was introduced into mouse fibroblast cell line NIH-3T3 by electroporation after being subcloned, purified and identified by limited enzyme digestion. After screened by G418, the positive clones were selected and identified by immunocytochemistry and Western-blotting. Contrasted with NIH-3T3 cells transfected with empty plasmid, the effect of high-level HSP90 on cell proliferation and cell cycle was analyzed by MTT method and flow cytometry.

RESULTSThe rising level of HSP90 was shown by immunocytochemistry and Western-blotting. Compared with control, the growth of HSP90 highly expressing cell line slowed down and the DNA content of S phase was lower.

CONCLUSIONThe NIH-3T3 derived cell line, which stably expressed high level of HSP90 was established. The effect of high-level HSP90 on cell proliferation was to retard cell growth by affecting cell cycle.

Animals ; Cell Cycle ; Cell Proliferation ; HSP90 Heat-Shock Proteins ; metabolism ; Mice ; NIH 3T3 Cells

Objective To explore the value of microRNA in differential diagnosis of tuberculous ascites and cancerous ascites.Methods From January 2011 to October 2013,31 patients with ascites were enrolled in this study,19 cases of whom had cancerous ascites (two cases of ovarian cancer,three cases of liver cancer,one case of bile duct carcinoma,five cases of gastric cancer,three cases of pancreatic cancer,four cases of colon cancer and one case of peritoneal mesothelioma) and 12 cases had tuberculous ascites.Ascites was collected for microRNA microarray detection,and the possible differential expressed microRNA was screened.The results of microarray were confirmed by TaqMan stem-loop real-time polymerase chain reaction (PCR) method.The t test,receiver operating characteristic (ROC) curve and area under the ROC curve (AUC) were performed for statistical analysis.Results The results of microRNA expression profiles indicated that there were differences between tuberculous ascites and cancerous ascites.The findings of TaqMan real-time PCR showed the expression of microRNA-21 in cancerous ascites was 39.3±11.6,which was much higher than that of tuberculous ascites (12.6 ±4.1),and the difference was statistically significant (t=4.921,P＜0.05).The expression of microRNA-134 in cancerous ascites was 68.2±20.4,which was lower than that of tuberculous ascites (210.2±37.2),and the difference was statistically significant (t =3.430,P ＜ 0.05).The AUC of microRNA-21 and microRNA-134 in differential diagnosis of tuberculous ascites and cancerous ascites was 0.882 (95 ％ CI 0.816-0.917) and 0.877 (95％ CI 0.782-0.901).The AUC of combined microRNA-21 and microRNA-134 in differential diagnosis of tuberculous ascites and cancerous ascites was 0.915 (95％ CI 0.863-0.967).Conclusions There are differences in microRNA expression profiles between tuberculous ascites and cancerous ascites.The detection of microRNA-21 and microRNA-134 expression in ascites is of great importance in differential diagnosis.

OBJECTIVETo establish a heat shock protein 90alpha (HSP90alpha) expression-inhibited cell line and study the effect of lowered HSP90alpha level on cell stress response.

METHODSThe recombinant plasimid pSilencerHSP90 containing the 21nt small interfering RNA of human HSP90alpha was subcloned, purified and identified by DNA sequence analysis before introduced into mouse fibroblast cell line NIH-3T3 by electroporation. After G418 selection, the positive clones were identified by immunofluorescence and Western blotting. NIH-3T3 cells were subjected to hyperthermia at 44 degrees C for 40 min to simulate oxidative stress, and flow cytometry was performed to analyze the effect of low-level HSP90 on DNA damage under stress condition.

RESULTSImmunofluorescence and Westen blotting showed lowered HSP90 levels in the transfected cells. Compared with the control cells, cells subjected to hyperthermia displayed intensified DNA damage.

CONCLUSIONLow-level HSP90alpha causes the cells to be more vulnerable to oxidative stress condition, and HSP90 content can be associated with cell protection against such condition.

Animals ; Base Sequence ; Blotting, Western ; DNA Damage ; Fluorescent Antibody Technique ; HSP90 Heat-Shock Proteins ; genetics ; metabolism ; Hot Temperature ; Mice ; Models, Biological ; Molecular Sequence Data ; NIH 3T3 Cells ; RNA Interference ; RNA, Small Interfering ; genetics ; Transfection

Lipoproteins are biological lipids carriers. The natural and reconstituted lipoprotein based drug delivery systems have been extensively developed in recent years. This article reviews the development of natural and reconstituted low-density lipoprotein and high-density lipoprotein based vehicles in the antitumor area.
Animals ; Antineoplastic Agents ; administration & dosage ; chemistry ; Apolipoproteins B ; administration & dosage ; chemistry ; Drug Carriers ; administration & dosage ; chemistry ; Humans ; Lipoproteins ; administration & dosage ; chemistry ; Lipoproteins, HDL ; administration & dosage ; chemistry ; Lipoproteins, LDL ; administration & dosage ; chemistry ; Nanoparticles ; Neoplasms ; drug therapy ; Peptides ; administration & dosage ; chemistry ; Pharmaceutical Vehicles ; chemistry

OBJECTIVE To explore the therapeutic effect of modified uvulopalatopharyngoplasty(UPPP) combined with temperature-controlled radiofrequency ablation(TCRFA) in the treatment of moderate and severe obstructive sleep apnea hypopnea syndrome(OSAHS) . METHODS A total of 83 patients with moderate or severe OSAHS were underwent modified UPPPcombined with TCRFA. All patients were followed-up more than 2 years. Polysomnography was examined at 6 months,1 year and 2 years after operation. RESULTS The curative rate,obvious effective rate and effective rate were 28.9 %,33.7 % and 20.5 % respectively with a total effective rate of 83.1 % at 2 years after operation. The PSG showed that,the AHI values decreased signifi cantly(P

AIMTo construct underexpression HSP90alpha and overexpression HSP90beta human hepatoma cell line HepG2.

METHODSThe combined plasimid pSilencerHSP90alpha and pSmycHSP90beta were introduced into HepG2 by electroporation, respectively. The result of transfection was identified by Western-blotting and the curve of cell growth was drew by MTT. Observe the cell vitality and expression of HSP90.

RESULTSExpression of HSP90 in transfected cell line was shown by Western-blotting: Compared with control, expression of HSP90 in the cells transfected with pSilencerHSP90alpha decreased, whereas that in the cells transfected with pSmycHSP90beta increased.The growth curves of the two groups of transfected cells was as the same as that of the control group.

CONCLUSIONThe stable overexpression HSP90beta and underexpression HSP90alpha HepG2 cell lines were established.

Base Sequence ; Electroporation ; HSP90 Heat-Shock Proteins ; genetics ; metabolism ; Hep G2 Cells ; metabolism ; Humans ; Molecular Sequence Data ; RNA, Messenger ; genetics ; metabolism ; RNA, Small Interfering ; genetics ; Transfection

OBJECTIVE: To establish 2-dimensional electrophoresis (2-DE) maps of Helicobac-ter pylori in human gastritis, and gastric cancer, to identify the differentially expressed proteins,and to discuss the role of bacterial factor in pathogenesis. METHODS: The total proteins of Helicobacter pylori in human gastritis and gastric cancer were separated by immobilized pH gradient-based 2-DE. The differentially expressed proteins were screened by PDQuest analysis software and identified by peptide mass fingerprint based on matrix-assisted laser desorption/ionization time of flight mass spectrometry, and searched on database. RESULTS: A well-resolved and reproducible 2-DE pattern of Helicobacter pylori was obtained from patients with human gastritis and gastric cancer. Fourteen differentially expressed proteins were identified, including proteins related to anti-oxidation,molecular chape-rones and detoxification, enzymes related to metabolism,proteins related to cytoarchitecture,and proteins related to signal conduction. CONCLUSION A well-resolved and reproducible 2-DE pattern of Helicobacter pylori in human gastritis and gastric cancer is established and differentially expressed proteins from these 2 diseases are identified. The differentiation of protein expression may play an important role in the pathogenesis of gastric cancer.
Bacterial Proteins ; analysis ; Electrophoresis, Gel, Two-Dimensional ; Female ; Gastritis ; microbiology ; Helicobacter Infections ; microbiology ; Helicobacter pylori ; Humans ; Male ; Proteome ; analysis ; Proteomics ; methods ; Stomach Neoplasms ; microbiology

OBJECTIVE: To establish a cost-effective and easily available phantom for training residents in ultrasound-guided fine needle thyroid nodule targeting punctures. MATERIALS AND METHODS: Tofu, drinking straws filled with coupling gel, a urine tube, and 21-gauge needles were used to generate a phantom thyroid with nodules for training. Twelve radiology residents were involved in the study. The puncture success rates were recorded and compared before and after phantom training using the Wilcoxon signed-rank test. RESULTS: On ultrasonography, tofu mimicked the texture of the thyroid. Drinking straws filled with coupling gel mimicked vessels. The urine tube filled with air mimicked the trachea, and 21-gauge needles mimicked small nodules in the transverse section. The entire phantom was similar to the structure of the thyroid and surrounding tissues. The puncture success rates of radiology residents were significantly increased from 34.4 ± 14.2% to 66.7 ± 19.5% after training (p = 0.003). The phantom was constructed in approximately 10 minutes and materials cost less than CNY 10 (approximately $ 1.5) at a local store. CONCLUSION: The tofu model was cost-effective, easily attainable, and effective for training residents in ultrasound-guided fine needle thyroid nodule targeting punctures in vitro.
Drinking ; In Vitro Techniques ; Needles* ; Punctures* ; Soy Foods* ; Thyroid Gland* ; Thyroid Nodule* ; Trachea ; Ultrasonography

OBJECTIVETo establish stress adaptation model of mouse fibroblast cell line NIH-3T3, to provide a group of parallel object for stress adaptation research, and to explore the function and mechanism of HSP90 in stress adaptation.

METHODSA stress-adapted cell model was established by thermal preconditioning (42 degrees C, 20 minutes), and the adaptation result was evaluated by observing the change of the membrane injury and the damage of DNA induced by the heat stress for the second time (44 degrees C, 20 minutes). The HSP90 content was detected by Western blot.

RESULTSAccording to the membrane injury and HSP90 synthesis induced by the heat stress for the second time, it was primarily confirmed that 6 hours after thermal preconditioning were the optimum stress protection time. When cells underwent heat stress for the second time 6 hours after thermal preconditioning, the membrane injury (15.4% +/- 2.6% vs 41.2% +/- 5.1%), damage of DNA (15.1% vs 26.3%) were decreased compared with the control group in which there was no preconditioning. The OD(HSP90)/OD(control) value indicated that the cellular HSP90 contents was decreased immediately after heat stress (44 degrees C, 40 min). The content of HSP90 was 0.82 +/- 0.18 in the heat stress group, 1.70 +/- 0.52 in the preconditioning group and 1.41 +/- 0.16 in the heat stress after preconditioning group.

CONCLUSIONWith the preconditioning for the NIH-3T3, the time point for the stress protection is confirmed, the model for the cellular stress adaptation is established and the protective effect of HSP90 is primarily confirmed in this model.

Adaptation, Physiological ; physiology ; Animals ; DNA Damage ; HSP90 Heat-Shock Proteins ; biosynthesis ; Heat Stress Disorders ; metabolism ; physiopathology ; L-Lactate Dehydrogenase ; metabolism ; Mice ; NIH 3T3 Cells