Objective:To study the effects of dexamethasone(DEX)on the cytotoxicity and apoptosis of NK-92MI cells and the mechanisms involved.Methods:NK-92MI cells were treated with different doses of DEX.The proliferative rate and cytotoxicity of the NK-92MI cells were detected by MTT colorimetry.The cell apoptotic rate was observed by flow cytometry with Annexin V and propidium iodide(PI)double staining.The expression of apoptosis-related gene,Bcl-2 and Bax was detected by RT-PCR.Results:After treated with 1?10-8mol/L to 1?10-3mol/L of DEX for 24 h,48 h and 72 h,the proliferation of NK-92MI cells was significant inhibited(P

Objective To treat hydrosalpinx by using interventional embolization of fallopian tube or laparoscopic salpingectomy before the performance of auxiliary reproductive technology,i.e.in vitro fertilization and embryo transplant (IVF-ET),and to compare the clinical effect,technical advantages and disadvamages between the two methods.Methods A total of 170 patients with tubal infertility who had received IVF-ET were selected,the clinical data were retrospectively analyzed.The patients were divided into three groups:(1) interventional embolization group (n=65),using interventional embolization for hydrosalpinx;(2) laparoscopic salpingectomy group (n=55),adopting laparoscopic salpingectomy for hydrosalpinx;and (3) control group (n=50):for these patients bilateral proximal fallopian tube obstruction was performed,and IVF-ET was directly carried out if the patient had no hydrosalpinx.Results No statistically significant differences in the used dosage of gonadotropin (Gn),E2 level on HCG-injection day,the number of follicles on HCG-injection day,the number of retrieved oocytes,the fertilization rate,cleavage rate,clinical pregnancy rate,abortion rate,and ectopic pregnancy rate existed between each other among the three groups (P＞0.05).The technical success rate in both interventional embolization group and laparoscopic salpingectomy group was 100％.No severe complications occurred.The interventional embolization procedure had some advantages,it could be completed at clinic room,the operation time was short,no anesthesia was needed,the medical cost was low,etc.Conclusion Interventional embolization of fallopian tube and laparoscopic resection are equally effective in treating hydrosalpinx before IVF-ET is conducted.Both methods can improve pregnancy outcome,but interventional embolization method is more simple,safe,economical and effective,which deserves to be the preferred method of treatment.

OBJECTIVE: To investigate the treatment for benign tumor of external auditory canal by carbon dioxide laser under microscope. METHOD: Ten cases of benign tumor of external auditory canal were treated by carbon dioxide laser under microscope. The curative effects and complications were observed. RESULT: Ten cases of benign tumor of external auditory canal were satisfied after operation without any complications. There were no recurrences during 3 months to 2 years of follow up. CONCLUSION The operation for benign tumor of external auditory canal by carbon dioxide laser under microscope was easy, safe and effective.
Ear Canal ; pathology ; Ear Neoplasms ; therapy ; Humans ; Laser Therapy ; methods ; Lasers, Gas ; Microscopy ; Neoplasm Recurrence, Local ; Neoplasms

AIM:To investigate the protective effect of lycopene on primary mouse cerebrocortical neurons ex -posed to tert-butyl hydroperoxide ( t-BHP) and its mechanisms of in vitro.METHODS:Primary cerebrocortical neurons of newborn C57 mice were extracted and divided into normal group , t-BHP group, lycopene +t-BHP group and lycopene group.The neuronal damage was induced by t-BHP exposure for 24 h, and the cell viability was examined by MTT assay . ROS content was measured by flow cytometry , and the protein levels of Bax , Bcl-2, caspase-3, cleaved caspase-3 and cyto-chrome C were examined by Western blot .RESULTS:The primary mouse cortical neurons expressed MAP-2 protein.Ly-copene at concentration of 4μmol/L reversed the decrease in cell viability .Flow cytometry revealed that lycopene treatment attenuated ROS content under the condition of t-BHP exposure.In addition, the protein level of Bcl-2 was increased, and the expression of Bax , cleaved caspase-3 and cytochrome-C was suppressed in lycopene +t-BHP group.CONCLUSION:The protective effect of lycopene on cortical neurons with t-BHP-induced injury may be involved in the mechanism of neuro-nal antioxidative response by down-regulating caspase-3 and Bax/Bcl-2 through the mitochondrial apoptotic pathway .

Objective To study the prevalence of hypertension in a Beijing urban population aged 6074 years and to analyze the characteristics of hypertension distribution. Methods A(cross-sectional) study was carried out in the population consisting of 1175 people,and data of blood pressure,glucose,lipid and obesity were analyzed. Results (1) The age-adjusted prevalence of hypertension was 60.5% in the Beijing elderly population.About two thirds of the hypertensive cases were taking prescribed medication(60.9%).Only one quarter of hypertension was controlled successfully(23.4%).(2)Compared with 60-64 age group,the prevalences of hypertension of 70-74 age group was increased by 30.3% in man and by 32.1% in women.(3) The prevalence of isolated systolic hypertension in the elderly was 25.0%,accounting for 42.3% of hypertension in the elderly population.(4) Eighty-six percent of all elder hypertensive patients had one and more cardiovascular risk factor and more in addition to hypertension itself. Conclusions High blood pressure is a popular disease of cardiovascular disorders in Beijing elderly population.Isolated systolic hypertension is the main hypertension subtype in the elderly.Most of the elderly hypertension patients combine other cardiovascular disease risk factors.

Objective To elucidate the association of fibroblast growth factor 23 (FGF23)with coronary artery calcification in patients with moderate and advanced stage chronic kidney diseases (CKD). Methods Serum intact FGF23 levels in 150 patients with CKD stage 3 to 5 and 25 age- and sex-matched healthy controls were measured by ELISA.The association between FGF23 and coronary artery calcification was studied. Results Serum FGF23 levels in CKD patients were significantly higher than those in healthy controls [196.46 (83.09,355.02) ng/L vs 27.17 (21.63,51.20) ng/L,P＜0.01].The levels of FGF23 were significantly higher in dialyzed patients than those in non-dialyzed patients (P＜0.01),and hemodialysis patients had higher levels as compared to peritoneal dialysis ones [6048.29 (1129.08,34807.45) ng/L vs 1625.80 (602.83,7521.78) ng/L,P＜0.01].The incidence of coronary artery calcification was relatively high in patients with moderate and advanced stage CKD (74/130,56.9％ ).Serum FGF23 level was positively correlated with coronary artery calcification score (CaS) (r=0.177,P＜0.05).Logistic regression analysis showed that age (β=0.091,OR=1.095,P＜0.01),duration of dialysis (β=2.013,OR=7.483,P＜0.05) and FGF23 level (β=0.838,OR=2.311,P＜0.05) were independent risk factors for coronary artery calcification in patients with moderate and advanced stage CKD.ROC curve of coronary artery calcification revealed that area under curve (AUC) of FGF23 was 0.705 (P＜0.01).With the cut-off value of FGF23 as 786.73 ng/L,the diagnostic sensitivity and specificity in coronary artery calcification were 62.5％ and 75.9％.ROC curve of coronary artery calcification showed that AUC of alkaline phosphatase (AKP) was 0.626 (P=0.017).With the cutoff value of AKP as 79.75 U/L,the diagnostic sensitivity and specificity in coronary artery calcification were 84.5％ and 41.5％.There was no diagnostic value of serum phosphorus in coronary artery calcification. Conclusions Serum FGF23 level is correlated with coronary artery.calcification in patients with moderate and advanced stage CKD.The sensitivity of FGF23 is lower and the specificity is higher than those of AKP for the diagnosis of coronary artery calcification.

Objectives To explore the characteristics of status and different populations of prehospital death associated with acute coronary events among young adults in Beijing.Methods Data of acute coronary events of hospitalization or death were obtained from the Hospital Discharge Information System from Beijing Public Health Information Center and Death Register System from Beijing Center for Disease Control in Beijing.The total case fatality rate of acute coronary events and proportion of prehospital coronary heart disease (CHD) death were compared upon gender,area,occupation and marital status among people aged between 25-45 years old.Results A total of 3489 cases were identified during 2007 to 2009 with acute coronary events ( male:3183,female:306),with a mean age of (40.5 ± 4.3 ) years old.The 3-years' overall mortality was 26.0％,with female's higher than male's (51.0％ vs 23.6 ％,P ＜ 0.05 ) ; and it was higher in rural area than in urban areas (28.9％ vs 22.9％,P ＜0.05).Ninety-five percent of death due to acute coronary events occurred prehospital,with the proportion of 95.2％ in male and 94.2％ in female. Among the people with different occupations, self-employed people had the highest rate of prehospital death.Majority of prehospital deaths (64.8％ ) occurred at home.Conclusion More than 90％ of deaths caused by acute coronary events among young adults aged between 25-45 years old occurred before been admitted into hospital,and the site of prehospital deaths was mainly at home.

Objective To establish a method for determining hydrogen sulfide(H2S)in blood and apply it to practical cases.Methods A delute solution was achieved by adding 0.8 mL saturated borax solution into 0.2 mL blood sample was diluted with.1 mL acetonitrile solution containing 0.1％formic acid was then taken in a test tube,followed by adding 0.1 mL dilute solution and 0.1 mL thiozine aqueous solution(1％).After thorough mixing,the mixture was left to stand for 30 minutes.Subsequently,the sample was subjected to liquid chromatography-tandem mass spectrometry(LC-MS/MS)analysis after centrifugation and membrane filtration.Results The results showed that H2S exhibited good linearity within the concentration range of 10～2 000 ng/mL,with the R2 value of 0.998 5.The detection limit was 5 ng/mL,and the quantification limit was 10 ng/mL.In three cases of H2S poisoning,sulfur ions were detected in the blood of the deceased individuals,with concentrations ranging from 0.17 to 0.56 μg/mL.Conclusion For the first time,this study established a LC-MS/MS method for determining H2S in blood,which can meet the detection needs of H2S poisoning cases.

OBJECTIVE: To explore the genetic etiology of 5 cases of monochorionic-diamniotic (MCDA) with genetic discordance. METHODS: 148 cases of MCDA twins who were diagnosed by amniocentesis at the Maternal and Child Health Care Hospital of Guangxi Zhuang Autonomous Region from January 2016 to June 2020 were selected as the study subjects. Relevant clinical data of the pregnant women were collected, and amniotic fluid samples of the twins were collected separately. Chromosomal karyotyping analysis and single nucleotide polymorphism array (SNP array) assay were carried out. RESULTS: The results of chromosomal karyotyping analysis showed that 5 of the MCDA twins had inconsistent chromosome karyotypes, with an incidence of 3.4% (5/148). SNP array assay showed that 3 fetuses were mosaics. CONCLUSION Genetic discordance occurs among MCDA twins, and prenatal counseling for such cases should be given by doctors with experience in medical genetics and fetal medicine, and personalized clinical management should be recommended.
Child ; Pregnancy ; Female ; Humans ; China ; Twins/genetics* ; Amniocentesis ; Karyotyping ; Fetus ; Twins, Monozygotic/genetics* ; Ultrasonography, Prenatal ; Retrospective Studies

OBJECTIVETo investigate the effects of adenoviral vector-mediated over-expression of Wnt3 on the apoptosis of hepatic progenitor cells in vitro.

METHODSHepatic progenitor cells transfected with Ad-GFP-Wnt3 vector or the control vector Ad-GFP were examined for cell apoptosis under fluorescence microscopy with Hoechst 33342 staining, and the proportion of apoptotic cells were determined by flow cytometric analysis with Annexin-PE/7-ADD staining. The mRNA and protein expressions of Bax, Bcl-2 and Bcl-xl in the cells were detected by real-time PCR and Western blotting, respectively.

RESULTSReal-time PCR and Western blotting showed a high expression of Wnt3 in Ad-GFP-Wnt3-transfected hepatic progenitor cells, which exhibited significantly decreased cell apoptosis as compared with the control group. The expressions of Bcl-2 and Bcl-xl mRNA and proteins increased significantly while Bax expression decreased obviously in Ad-GFP-Wnt3-transfected cells (P<0.05).

CONCLUSIONSAdenoviral vector-mediated over-expression of Wnt3 can suppress apoptosis of hepatic progenitor cells possibly through the Bcl-2 pathway.

Apoptosis ; Cells, Cultured ; Genetic Vectors ; Hepatocytes ; cytology ; Humans ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Stem Cells ; cytology ; Transfection ; Wnt3 Protein ; metabolism ; bcl-X Protein ; metabolism