By the application of hybridoma technique we have established 3 cell strains designated as 1 D 1, 1 C 2 and 1 D6, which all the strains secrete anti-acute nonlymphocytic leukemia M2-type monoclonal antibodies individually. These strains secrete the McAb steadily after passed on propagation over 11 months. The McAb secreted by these cell strains all give positive reactions with the leukemia cells from actue non-lymphocytic leukemia M2-type pationt, but not with cells from M1, M3, M4, and M5 type patients. These McAb also can not react with cells from chronic myelocytic leukemia and its acute transformation phase and acute lymphocytic leukemia patient. The McAb can not react with white cells from normal adults too. From the above metioned we may conclude that the McAb secreted by these cells possess a remarkable specificity. Therefore it is applicable for the immuno-typing diagnosis of acute non-lymphoc yt ic leukemia and researches on target directed therapeutics.

Objective To study the effects of static magnetic field (SMF) on development of rat embryonic spinal cord neurons. Methods Primary cultured embryonic spinal cord neurons of Wistar rat were exposed to 1.0, 10.0, 50.0, 100.0 and 200.0 mT static magnetic field. The morphological structure, cell's differentiation and proliferation of the embryonic spinal cord neurons were observed and the contents of MDA, superoxide dismutase (SOD) and protein contents in the neurons were determined. Results Static magnetic field at density of 50-200.0 mT could inhibit the differentiation and proliferation of the cells and the phenomena such as cell aggregation, detouchment of some cells, decrease of clone-formation rate and the size of the cells were observed. The contents of MDA in the cells were increased, while the activities of SOD and the level of protein were decreased. Conclusion Static magnetic field might damage the development of embryonic spinal cord neurons by enhancing the lipid peroxidation.

[Objective]To establish a method for obtaining well-differentiated goat chondrocytes quickly in large scale by RCSS using microcarriers technique. [Method]Articular chondrocytes were harvested from goat by sequential digestion with trypsin and collagenase , and then grown in RCSS bioreactor culture system which contained the Cytodex-3 microcarriers in the culture medium (DMEM) . Growth of chondrocytes on Cytodex-3 microcarriers was observed dynamically under phase contrast microscope . Immunocytochemical analysis was performed for type Ⅰcollagen and type Ⅱcollagen. [Result]The articular chondrocytes attached rapidly to the surface of Cytodex-3 microcarriers. Quick growth of these cells was observed after they fully spread onto the microcarriers. The density of chondrocytes increased by 15～17 times in later stage of culture as compared with the initial density. The harvested chondrocytes had no detectable staining for collagen type Ⅰ, but stained intensively for collagen type Ⅱ. [Conclusion]Microcarrier culture of chondrocytes can yield a large quantity of goat cells within a short time ,which will be of benefit for banking cartilage cells for reconstruction of impaired cartilage by way of tissue engineering.

[Objective]To analyze factors related with surviving rate and to evaluate effectiveness of the adjuvant chemotherapy in the treatment of osteosareoma.[Method]Eighty-four patients aging from 9 to 47 years(averaged,21 years)were analysed respectively:52 of them were male and 32 were female.The tumors were located at the femur in 42,the tibia in 29,the humerus in 13.There were 22 patients classified as stage ⅡA and 62 patients as ⅡB.The pathological study,of subtype of osteosarcoma revealed that 47 were osteoblastic,11 chondroblastic,19 fibroblastic and 7 other subtypes.There were 46 patients who received the chemotherapy;38 patients without chemotherapy,49 of the 84 patients treated surgically had limb salvage procedures,35 had amputations.Multivariate analsis was done by using the proportional hazards model of Cox,categoric data were analyzed by using the chi-square statistic.[Result]All cases were followed up from 6 to 74 months(with an average of 25.5 months).Cox model analysis showed that age,sex,site,and subtype were not significant prognostic variables in this group of patients;the significant affecting prognosis in patients was Enncking staging and chemotherapy.Chi-square showed significant difference in the higher metastasis rates of lung in the group without chemotherapy than in those with chemotherapy group(P

OBJECTIVE:To evaluate the status quo and the tendency of the use of antihypertensives in our hospital. METHODS: The utilization of antihypertensives during 2005～2007 in our hospital were analyzed statistically in respect of the consumption sum, DDDs and average daily cost etc. RESULTS: Over the 3 years, the consumption sum and DDDs of the antihypertensives used in our hospital increased markedly, especially those of calcium antagonists, angiotensin, ACEI and diuretic antihypertensives. The consumption of AGT Ⅱreceptor blocking agents increased year by year. CONCLUSION: The utilization structure of antihypertensives in our hospital is basically reasonable. It is of great importance to develop effective compound antihypertensive drugs with low-cost and less ADRs.

Objective To approach the effect of acrylonitrile (ACN) on the proliferation and differentiation of the lung fibroblasts of mice. Methods The purification and primary culture of the lung fibroblasts(LFb)of new born mice were conducted. The cells were treated with ACN added in the medium at the varying doses of 0.01, 0.5, 1.0, 10.0, 50.0, 100.0 and 200.0 ?g/ml. The cytomorphological methods were used, the protein, malonaldehyde (MDA) and the activity of superoxide dismutase (SOD) were determined. Results No inhibitted effect on the lung fibroblasts was observed at the doses of 0.01-10.0 ?g/ml. At the doses of 50.0-200.0 ?g/ml, acrylonitrile could inhibit the differentiation and proliferation of the cells, the volume of cells became small,the rate of cell clusters decreased, at the doses of 10.0-200.0 ?g/ml, the content of protein and the activity of SOD decreased, MDA content increased. Conclusion Acrylonitrile can inhibit the proliferation and differentiation of the lung fibroblasts in mice, protein synthesis inhibition and lipid peroxidation are considered as the related factors.

Background and purpose: It has been reported that activation of Notch1 could strongly inhibit proliferation of HPV (human papilloma virus)-positive HeLa cells by down-regulation of the E6 and E7 genes. The aim of this paper was to investigate the role of the Notch signaling pathway in growth arrest of EC109 cells in vitro and the molecular mechanism. Methods: EC109 cell lines, a well differentiated human ESCC (esophageal squamous cell carcinoma) cell line with HPV18-positive, was used in the study. Exogenous intracellular domain of Notch1(ICN) was transfected into cultured EC109 cells by lipofectamine transfection, the proliferation of the transfected cells was measured by an MTT assay. Cell cycle distribution was analyzed by flow cytometry. Human papilloma virus type 18 (HPV18) E6/E7 mRNA expression was detected by RT-PCR, and p53 protein expression was detected by Western blot.Results: Activation of Notchl signaling resulted in inhibition of EC109 cell proliferation with the induction of G_2/ M arrest. There was a significant difference in terms of the percentage of G_2/M phase cells among the ICN-transfected group (42.57±1.57)% and the non-transfected group (1.88±0.66)% or the empty plasmid transfected group (1.99±1.02)% (P<0.01). Down modulation of HPV18 E6/E7 gene expression and upregulation of p53 expression was (2.15±0.23) in ICN-transfected group higher than non- transfected group (0.45±0.07) and empty plasmid transfected group (0.46±0.02) (P<0.01). Conclusion: Repression of HPV18 E6/E7 expression by Notch1 signaling results in growth suppression of HPV18-positive EC109 cells with concomitant activation of p53-mediated pathways.

Objective To evaluate prevalence and risk factors of urinary incontinence(UI)among aged women living at nursing homes in Beijing,and provide references of relative health strategy.Methods Totally 642 women aged 60 years and over were randomly selected at nursing homes from 6 districts in Beijing.A questionnaire survey was conducted using International Consultationon Incontinence Questionnaire Female Lower Urinary Tract Symptoms Module (ICIQFLUTS) recommended by International Consultation on Incontinence (ICI).Results The prevalence rate of UI was 38.0％ (244/642) among whom 38.5％ (94/244) of participants knew their health conditions,7.8％ (19/244) visited hospital and 6.6％ (16/244) received medical or operational treatment.The proportions of respiratory disease ( 27.0 ％ vs.14.6％),digestive disease (23.4％vs.15.3％),urological disease(24.6％vs.8.5％),cardio-cerebralvascular disease(74.2％ vs.53.5％),neurological disease ( 9.4 ％ vs.5.0％),obstetric disease ( 27.5％ vs.10.1％),menstrual disorder (21.4％vs.14.4％),getting married before aged 21 years (51.5％vs.40.8％),being pregnant more than 4 times(50.2％vs.40.9％),the experience of both cesarean and natural birth (4.0％vs.0.8％),constipation(40.2％ vs.29.4％),fecal incontinence ( 13.1％ vs.4.0％),uneasy movement ( 22.5％vs.10.6％) and drinking (8.6％vs.3.5％) were higher in women with UI than in women without UI (P＜0.05 or P＜0.01).Eight risk factors that were entered into logistic regression model included getting married before 21 years old (OR =1.5,95 ％ CI:1.0-2.3,P＜0.05),being pregnant more than 4 times(OR=1.7,95％CI:1.1-2.4,P＜0.05),menstrual disorder(OR=1.7,95％CI:1.0-2.7,P＜0.05),respiratory disease(OR=1.6,95 ％CI:1.0-2.6,P＜0.05),urological disease(OR=2.4,95 ％CI:1.4-4.1,P＜ 0.01 ),cardio-cerebralvascular disease ( OR =2.0,95 ％ CI:1.3-3.0,P ＜ 0.01 ),obstetric disease(OR=3.4,95％CI:2.0-5.6,P＜0.01),moving uneasily(OR=2.5,95％CI:1.5-4.0,P＜0.01).Conclusions UI is a common disease among women residing at nursing homes.Specific measures including intervention and clinical treatment targeting risk factors should be conducted.

OBJECTIVE:To establish a HPLC-chiral stationary phase(CSP) for separating the enantiomers of lactic acid and determining the optical purity of lactic acid.METHODS:Lactic acid samples of different optical purity were determined by HPLC-CSP vs.optical rotation method.The enantiomers of lactic acid were separated on Chirex 3126(D)-penicillamine chiral column.The mobile phase consisted of copper sulfate solution-isopropyl alcohol (85∶15) at a flow rate of 0.6 mL?min-1.The detection wavelength was set at 254 nm.RESULTS:A baseline separation of the enantiomers of lactic acid was achieved with a separation factor of greater than 1.2.The calibration curve was linear in the range of 0.75～48.24 mg?mL-1 (r=0.999 3),RSD=1.21%.The determination results determined by HPLC-CSP were similar to those determined by optical rotation method.CONCLUSION:The established method is simple,reliable in results and reproducible,and it is applicable for the separation of the enantiomers of lactic acid and determination of the optical purity of lactic acid.

Objective To evaluate the therapeutic value of minimally invasive excision of benign breast lesions using stereotactic mammotome minimally invasive surgery system.Methods Under ultrasonographic image monitoring,1160 breast masses of 310 patients were excised using mammotome minimally invasive stereotactic excision system and sent for pathologic examinations immediatly.Patients′condition was follow-ed up and recorded post-operative.Their clinical data were retrospectively analysed.Results Accurate and complete resection of all of the 1160 breast masses was achieved.The resected tissues were large enough to make pathologic diagnosis.The pathologic diagnoses were all found to be benign,and included: fibroadenoma(n=672),fibroadenosis(n=451),intraductal papilloma(n=12),cyst(n=6),cystic hyperplasia(n=17) and tubular adenoma(n=17).Regular follow up every 6-12 months was done.Postoperative surgical scars were unremarkable,the skin incisions were small and concealed,breast appearance and skin sensation were normal and ultrasonography did not reveal residual lesions or recurrences.Conclusions Complete resection of benign breast lesions can be done with mammotome technique.This technique is safe,accurate and effective.Moreover,there is little trauma,low complication rate,and the breast appearance is not affected.This minimally invasive excision technique for benign breast lesions is suitable for wide use.