Objective To analyze the condition of Rhodamine 123 staining of human bronchial epithelium in vitro during the wound-repair process induced by fluorouracil(5-FU). Methods The bronchial epithelial cells in normal and 5-FU injurious group were obtained by enzymatic digestion and analyzed by flow cytometry.1.PI staining to identify the percentage of cells in different cell phase;2.Rhodamine 123 staining in live cells was to contrast the percentage of negative cells in two groups. Results 1.Analysis of cell cycle:apoptotic cells in injurious group increased,cells in S+G-2/M phase almost disappeared,majority of the remain live cells of injurious group were in G-0/G-1 phase;with the recover of bronchial epithelium,cells in S+G-2/M phase increased;2.The percentage of Rhodamine 123 negative staining live cells in injurious group was higher than that of normal group,and with the recover of bronchial epithelium,this percentage lowered to nearly normal.Conclusion 5-FU can make the cycling cells apoptosis and reserve quiescent phase cells.Among them there were bronchial stem cells which had the capacity to efflux Rhodamine 123.Just the proliferation and differentiation of these stem cells regenerated bronchial epithelium.Rhodamine 123 staining to sort the remain cells after 5-FU treatment by FACS can be used to enrich and purify bronchial stem cells.

Objective To study the effect of granulocyte-macrophage colony-stimulating factor(GM-CSF)on angiogenesis of rat with acute myocardial injury induced by isoproterenol(Iso). Methods A total of 60 adult male Wistar rats were randomly divided into 3 groups: normal control group, GM-CSF pretreatment group (GM-CSF group), and lso injury group, 20 rats in each group. GM-CSF group was administered recombinant human(rh)GM-CSF(5.0 μg/kg), through tail intravenous injection once a day for three days. Then the GM-CSF group and the Iso injury group were anesthetized by intraperitoneal injection of lso( 15.0 mg/kg) once a day for three days. The same dose of saline was administered in the same way to the control rats. Ten days after injection, pathological changes of myocardial damage and infarct area were examined by immunohistochemistry. The mRNA expression levels of polypeptide antigen (CD34), vascular endothelial growth factor (VEGF) and its receptor KDR/flk- 1 were measured by RT-PCR. Results The difference of myocardial necrosis area between groups was statistically significant(F=10.07, P < 0.01), in which GM-CSF group[(37.37 ± 12.98)%] was significantly less than Iso injury group[(45.51 ±14.96)%, P < 0.05]. The difference of myocardial neovascularization density index of rats between groups was statistically significant ( F = 25.54, P < 0.05 ), in which GM-CSF group [(3980.05 ± 477.22) No/mm2] was significantly higher than Iso injury group((2605.93±361.49)No/mm2,P<0.01).The differences of myocardial CD34,VEGF,KDR/flk-1 mRNA expression between groups were statistically significant(F=17.83,4.29,4.10,all P<0.01).Compared to Iso mjury group[CD34(23.85±6.06),VEGF(31.80±8.05),KDR/flk-1(30.16±8.01)]were higher in the GM-CSF group[CD34(44.04±10.13),VEGF(49A±11.59),and KDR/flk-1(46A9±7.90),all P<0.01].The expressions of myocardiM VEGF mRNA and its receptor KDR/flk-1 mRNA was positively correlated(r=0.725,R2=0.526,P<0.01).Conclusions GM-CSF prelreatmcnt increases the density ofnew blood vessels in myocardium,and reduces the Iso-induced myocardial injury in rats.

Adult ; China ; Female ; Humans ; Logistic Models ; Male ; Occupational Health ; statistics & numerical data ; Transients and Migrants ; Young Adult

Objective To analyze the distribution of human papillomavirus (HPV) genotype in the diseases associated with HPV infection and explore the role of HPV genotype in these diseases. Methods Retrospective analysis was carried out to compare HPV genotypes of 353 outpatients suffering the diseases associated with HPV infection including cervical caner,cervical intraepithelial neoplasia (CIN),genital duc condyloma,and subclinical cervical human papillomavirus infection (SPI) in our department from January to October 2008. HybriMax were used to detect HPV genotype. The distribution data of HPV genotype were statistically analyzed. Results Totally 176 HPV positive females were found with a positive rate of 49.86%. HPV positive rate in cervical cancer was 100%,and all of them were high risk HPV. The positive rate was increased with the severity of CIN,and the higher histological-grade was,the higher HPV positive rate was (P

Objective Probing into a way to reform the assessment indexing of diagnosis and treatment in clinical specialties, to help with objective assessment and ranking among hospitals in terms of the performances of their respective specialties. Methods Treatment outcomes of the diseases pinpointed by heart physicians and urology surgeons of three hospitals in 2005 as the criteria to calculate the adjusted value for fatality rate and cure rate. Results The adjusted value of fatality rate for the heart physicians is CFR≥1, and that of cure rate for the urology surgeons is CFR≤1. A trial assessment is made based on these figures, and a ranking is achieved on the diagnosis and treatment outcomes of the clinical medicine specialties in these three hospitals as a result. Conclusions Diseases as the assessment levels for medical quality of clinical medicine specialties and relative risks as the core computation adjusted factor, may help yield the indexes and methodology for clinical medicine specialties in line with China's specifics.

Objective To evaluate the status of iodine deficiency disorders(IDD) in Huai'an City in 2011 and to provide a scientific basis for adopting target prevention strategies timely and adjusting the intervention policy scientifically.Methods According to The National Project of Surveillance on IDD,probability sampling method (PPS) was used to select 30 counties in Huai'an City,and one primary school was selected randomly from each county,then 40 children aged 8 to 10 were randomly selected in each school.Children's thyroids were examined by palpation and the iodine in salt samples collected in their home was tested by direct titration.At the same time,urine samples from 12 children of the 40 selected children were collected and urinary iodine was tested by As(Ⅲ)-Ce4+ catalytic spectrophotometry.Questionnaire survey of IDD was conducted among 30 students of grade 5 and 5 housewives around that school.Results A total of 1200 children aged 8 to 10 were examined,and the goiter rate was 1.3％(15/1200).All the goiters were level Ⅰ.The goiters of each age group was 0.8％(3/390),1.8％(7/390) and 1.3％(5/420),respectively.The 360 urine samples were collected from children aged 8-10,and the median of urinary iodine was 171.5 μg/L with the proportions of ＜ 20 μg/L,＜ 50 μg/L and ＜ 100 μg/L were 0(0/360),1.1％ (4/360) and 5.6％ (20/360),respectively.A total of 1200 salt samples were tested in children's family.The coverage rate of iodized salt was 99.4％ (1193/1200) and the qualified rate of iodized salt was 97.7％ (1165/1193).The consuming rate of qualified iodized salt was 97.1％(1165/1200),and non iodized salt rate was 0.6％(7/1200).The knowledge rates of IDD were 82.7％ (2234/2700) and 69.8％ (314/450) in 900 students and 150 housewives,respectively.Conclusions In Huai'an City,except the knowledge rate of IDD,the goiter rate and urinary iodine of children aged 8-10,iodized salt consumption maintain at the stage of the target level.In addition to strengthen the monitoring of iodized salt and to supply qualified iodized salt,it should also increase the focus on health education propaganda in the future.

0.05). Conclusion When TOFR recovers to 0.55,antagonism of residual neuromuscular blockade is still necessary.Different doses of neostigmine may antagonize vecuronium-induced residual neuromuscular blockade,and lower dose of neostigmine(10-20 ?g/kg) is recommended.

Standardized training of residents is a necessary way for clinical medical personnel train-ing. Residents graduating from medical colleges and universities should accept the standardized, scientific, strict pre-service training, in order to realize role conversion from medical students to hospital physicians. This paper summarizes and analyzes the pre-service training, focusing on the training object, course design, organization implementation, evaluation, questionnaire survey, and puts forward some thoughts and sugges-tions on strengthening and improving pre-service training form, expanding the content of training, and quan-tifying the evaluation of training effect.

OBJECTIVELocalization of tracheal stem cells in rat trachea.

METHODSExtracorporeal tracheal injury (Wistar rats) was induced by 5-FU. The process of regeneration was observed and analyzed by light microscopy, electron microscopy, and immunohistochemistry.

RESULTSTwelve hours after treatment with 5-FU, the tracheal epithelium shed and cells with naked nuclei were seen located sparsely on the basement membrane. Six hours after removal of 5-FU, the tracheal rings were covered with flattened epithelium. These cells were poorly differentiated under electron microscopy. Immunohistochemistry showed few proliferating cell nuclear antigen (PCNA)-negative cells sparsely scattered among PCNA-positive cells on the basement membrane. Nine hours later, electron microscopy found that these cells differentiated into mucous cells and ciliated cells. Forty-eight hours later, the tracheal rings were entirely covered by pseudostratified ciliated columnar epithelium.

CONCLUSIONSA small number of G(0) cells with naked nuclei are located sparsely on the basement membrane of the trachea. Tracheal epithelium regenerates by proliferation and differentiation of these cells. It is likely that some of these G(0) cells on the tracheal basement membrane represent tracheal stem cells.

Animals ; Cell Differentiation ; Cell Proliferation ; Epithelium ; injuries ; ultrastructure ; Female ; Fluorouracil ; Male ; Microscopy, Electron ; Proliferating Cell Nuclear Antigen ; metabolism ; Rats ; Rats, Wistar ; Regeneration ; Stem Cells ; Trachea ; injuries ; pathology ; physiology ; Wound Healing ; physiology

OBJECTIVE To study the changes in inflammatory factors caused by prostatitis.METHODS SD rats were castrated under sterile conditions.E2 0.25 mg· kg-1+ T 0.25,0.5 and 1.0 mg· kg-1 were given sc for 30 d,respectively.Serum samples were taken and levels of E2,T and dihydrotestosterone (DHT) were detected by ELISA.Pathological changes of prostate tissue were observed by HE staining.The expressions of tumor necrosis factor-alpha (TNF-α),cyclooxygenase-2 (COX-2) and macrophage inflammatory protein 1alpha (MIP-1α) in prostate were detected by immunohistochemistry.RESLULTS ELISA detection showed that E2 levels were significantly increased [(80±7) ng· L-1,P＜0.01] in E2 0.25 mg· kg-1 group and that T levels were significantly decreased [111 ±6 vs (111 ±5) nmol· L-1,P＜0.05]in E20.25 mg ·kg-1 and E2+T 0.25 mg·kg-1 groups compared with the sham-operated group.E2 was significantly increased [(80±7) ng· L-1,P＜0.01] in E20.25 mg· kg-1 groups compared with the castrated control.The sham and castrated control showed normal glandular epithelium without leukocyte infiltration.In E2 0.25 mg·kg-1 group,extensive infiltration of inflammatory cells was found in the glandular lumens,suggesting the occurrence of chronic prostatitis.In each E2+T groups,fewer inflammatory cells were noted in the stroma around glands.The expressions of TNF-m COX-2 and MIP-1α in sham group were negative or low,while those of castrated control and E2 0.25 mg· kg-1 groups were high,especially in E2 0.25 mg· kg-1 group.The expressions of TNF-α,COX-2 and MIP-1α in each E2+T group were significantly decreased.CONCLUSION Testosterone can inhibit prostatitis and the expression of inflammatory factors,such as TNF-α,COX-2 and MIP-1 α,in castrated SD rats initiated by estrogen.