Adult ; Connective Tissue Cells ; Female ; Humans ; Male ; Middle Aged ; Myofibroblasts ; cytology ; Nasal Polyps ; pathology ; Young Adult

Over-expression of P-glycoprotein (P-gp), an ATP-dependent drug efflux pump, represents one of the major mechanisms that contribute to multidrug resistance (MDR) in cancer cells. This study examined the effects of troglitazone, a ligand of peroxisome proliferator-activated receptor gamma (PPARgamma), on P-gp-mediated MDR in SGC7901/VCR cells (a vincristine-resistant human gastric cancer cell line). The expression of P-gp was detected by RT-PCR and Western blotting, respectively. The SGC7901/VCR cells were treated with 0.1 mg/L vincristine (VCR) alone or in combination with 1, 5, 10 mumol/L troglitazone for 24 h. PPARgamma was measured by electrophoretic mobility shift assay (EMSA). The intracellular concentration of Rhodamine123 (Rh123, a fluorescent P-gp substrate) was assayed to evaluate the activity of P-gp. The cell cycle and apoptosis were measured by flow cytometry. The results showed that the P-gp was increasingly expressed in SGC7901, BGC823 and SGC7901/VCR cells in turn, suggesting that MDR in the SGC7901/VCR cells was mediated by the increased expression of P-gp. In the SGC7901/VCR cells, the expression level of total PPARgamma was increased, however, the protein level and activity of PPARgamma in the nuclei of cells decreased significantly. Troglitazone elevated the PPARgamma activity in SGC7901/VCR cells in a dose-dependent manner. Troglitazone decreased the P-gp expression and markedly enhanced the accumulation of Rh123 in SGC7901/VCR cells in a dose-dependent manner. We also found that troglitazone significantly increased the percentage of SGC7901/VCR cells in the G(2)/M phase and decreased the cell percentage in G(1) and S phase in a dose-dependent manner. Troglitazone significantly increased the apoptotic rate of SGC7901/VCR cells treated by VCR or ADR in a dose-dependent manner. It was concluded that P-gp-overexpressed SGC7901/VCR cells have minor endogenous PPARgamma activity. Elevation of the PPARgamma activity by troglitazone can reverse P-gp-mediated MDR via down-regulating the expression and activity of P-gp in SGC7901/VCR cells. It was suggested that troglitazone can dramatically enhance the sensitivity of P-gp-mediated MDR cancer cells to chemotherapeutic agents.

ObjectiveTo evaluate the application value of magnetic resonance diffusion weighted imaging (DWI)in diagnosis and differential diagnosis of prostate cancer. Methods53 Cases of suspected prostate cancer patients with elevated prostate-specific antigen, abnormaldigital rectal examination or ultrasound examination were underwent DWI examination before operation. Apparent dispersion coefficient was measured and compared to pathological results. Results There were 15 cases of prostate cancer, 37 cases of benign prostate hyperplasia and one prostatic intraepithelial neoplasia. When b =1 000 s/mm2 ,the ADC values of foci area in prostate cancer group and peripheral zone in benign prostate hyperplasia group were (0.813 ±0.25) × 10-3mm/8 and (1.45±0.24) × 10-3mm/s respectively, and the difference had statistical significance(t =-26. 117,P ＜0. 01 ). When b =60D s/mm2, the ADC values of foci area in prostate cancer group and peripheral zone in benign prostate hyperplasia group were ( 1.03 ± 0. 27) × 10-3 mm/s and ( 1.62 ± 0. 33) × 10- 3 mm/s respectively, and the difference had statistical significance( t =- 24. 191, P ＜ 0. 01 ). The area under the ROC curves was 0.862, and the sensitivity and specificity of DWI were 78.1％ and 91.5％ respectively.ConclusionDWI can provide quantitative information for prostate cancer diagnosis and differential diagnosis,therefore it possesses a good clinical application value.

Objective To explore the status of early postoperative social relationship quality and hope level in patients with breast cancer and analyze the correlation between them. Method A questionnaire survey was conducted among 100 patients with breast cancer using the social relationship quality scale and Herth hope scale. Results The total score and expected total score of early postoperative social relationship were (47.86±6.10)and (30.81±1.86), respectively. There was a positive correlation between the two groups (r=0.324,P<0.05). Conclusions The quality of social relations in the postoperative patients with breast cancer is positively correlated with the level of hope. Nursing staff should give breast cancer patients hope and strength at the same time, helping them understand and use social relations to improve the quality of life.

To study the stimulation effect to the growth of Bifidobac te rium sp. A04, 4 kinds of oligosaccharide, 8 kinds of Chinese traditional medi cine and 4 kinds of food raw materials were used. The results indicates that so ya bean oligosaccharide is the most effective (P

Because of the population aging,the increase of the stroke patients and the need for rehabilitation,the treatment only in the rehabilitation department of the hospital is far from the satisfaction of people's demands of the service of rehabilitation.It is important to extend the community-based rehabilitation.Compared with the rehabilitation in hospitals,it is more economy,efficiency and convenience for stroke patients in community-based rehabilitation services,and further improve the rehabilitation effect of stroke patients.

BACKGROUND: Vascular endothelial growth factor family and its receptor play an important role in the process of angiogenesis and neovascularization. Recently, the effect of vascular endothelial growth factor family on blood has been paid much attention. OBJECTIVE: To observe the expression of vascular endothelial growth factor A (VEGFA), vascular endothelial growth factor C (VEGFC) and their receptors as well as angiopoietin-1 (ang-1),angiopoietin-2(ang-2) and their receptors in the blood island of yolk sac and aorta-gonadalmesonephros (AGM) region at embryonic 3 to 12 weeks, so as to investigate the effect of VEGF and angiopoietin family in the process of haematogenesis. DESIGN: Single sample observation. SETTING: Weifang Medical College, Experimental Center of Morphology and Staff Room of Anatomy. MATERIALS: This experiment was carried out at Weifang Medical College from February 2002 to August 2004. Specimens were collected from 47 pregnant women's 3-to-12-week abortive embryos. Informed consent was obtained from the pregnant women. METHODS: Specimens were performed successive sections. Two sections were drawn out every other 10 sections. Hematoxylin-eosin staining and immunohistochemical staining were performed. Polyclonal anti-vascular endothelial growth factor C, fms like protein tyrosine kinase(PTK), flt-4,ang-1, ang-2,Tie-2 antibody, monoclonal anti-vascular endothelial growth factor A and fetal liver kinase 1 (flk1) antibody were used for incubation overnight at 4 ℃ .Goat anti-mouse IgG and SABC solution were used separately for 2 hours. 3,3'2 diaminoazobenzidine (DAB) was used to develop. Serum of normal rabbit or mouse were used separately to replace primary antibody as negative control. They were observed and taken photographs under optical microscope. MAIN OUTCOME MEASURES: ①Blank expression of VEGFA and VEGFC and their receptors in the blood island of yolk sac and AGM region at embryonic 3 to 12 weeks. ②Blank expression of ang-1 and ang-2 and their receptors in the blood island of yolk sac and AGM region at embryonic 3 to 12 weeks. RESULTS: ①On the 21st to 25th day , vascular endothelial cells and hematopoietic cells in blood island of yolk sac strongly expressed VEGFA and its receptor fms like PTK and flk1, VEGFC and its receptor flk4, ang2 and its receptor Tie-2 protein, weakly expressed ang-1 protein. ②From the fourth week of development, dorsal aorta and mesonephros expressed above-mentioned various factors and their receptors . Immune positive reactants gathered in the large and round hematopoietic cells with nucleus. The cell quantity reached the peak at week 7. After week 8, the number of positive cells was significantly decreased, and almost all the blood cells were immune negative reaction at week 12. ③Gonad mainly expressed VEGFA , fms like PTK, flt-4,ang-1 ,ang-2 and Tie-2 protein at weeks 6 to 8 , but did not express VEGFC and flkl. ④ The expression of above-mentioned factors were not detected in the vascular endothelial cells in AGM region. CONCLUSION: Hematopoietic cells and endothelial cells of blood island of yolk sac of human embryo as well as dorsal aorta and mesonephros coexpresses various factors related to angiogenesis and haematogenesis. Haematogenesis of human embryos occurs at the fourth week.

OBJECTIVETo study feasibility of Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2000) and British Isles Lupus Assessment Group 2004 (BILAG-2004) scoring systems for assessing renal disease activity in children with lupus nephritis (LN).

METHODSThe clinical data of 159 children with systemic lupus erythematosus (SLE) and LN were collected, and disease activity was assessed by SLEDAI-2000 and BILAG-2004 scoring systems. The correlations between SLEDAI-2000 and BILAG-2004 scores and 24-hour urinary protein excretion and renal pathology index were analyzed. The SLEDAI-2000 and BILAG-2004 scoring systems were evaluated using ROC curve.

RESULTSApproximately one third (31.5%) of the 159 children had a moderate level of 24-hour urinary protein excretion. Among the 37 patients undergoing renal biopsy, 46.0% had diffuse LN (type Ⅳ). 24-hour urinary protein excretion was positively correlated with both SLEDAI-2000 (r=0.36, P<0.05) and BILAG-2004 scores (r= 0.39, P<0.05). Children with types Ⅰ, Ⅱ, Ⅲ, and Ⅳ LN had pathology activity index (AI) which positively correlated with SLEDAI-2000 scores (r=0.86, 0.88, 0.84, 0.77 respectively; P<0.05) and BILAG-2004 scores (r= 0.88, 0.98, 0.86, 0.89 respectively; P<0.05). SLEDAI-2000 score showed the best correlation with AI in patients with type Ⅱ LN, followed by those with type Ⅰ LN. BIILAG-2004 score showed the best correlation with AI in patients with type Ⅱ LN, followed by those with type Ⅳ LN. The BILAG-2004 scoring system had an area under the ROC curve (AUC) of 0.93, and the SLEDAI-2000 scoring system had an AUC of 0.88.

CONCLUSIONSBILAG-2004 and SLEDAI-2000 scoring systems can be used to assess renal disease activity of patients with LN. The BILAG-2004 scoring system can provide more reliable and comprehensive assessment.

Adolescent ; Child ; Feasibility Studies ; Female ; Humans ; Kidney ; pathology ; Lupus Erythematosus, Systemic ; pathology ; Lupus Nephritis ; pathology ; Male ; Proteinuria ; classification ; ROC Curve

BACKGROUND: There are few studies conceming morphological charactedstics, space-time distribution and differentiation of hepatic stem cells during embryo liver development.OBJECTIVE: To understand the action of alpha fetoprotein, cytokeratin-19 (CK19) and c-Met in the liver through observing the expression of them.DESIGN, TIME AND SETTING: The in vitro cytological observational study was performed at the Central Laboratory of Weifang Medical College from June 2005 to December 2006.MATERIALS: A total of 40 embryo samples were obtained from 3-rnonth aborted fetus, which were supplied by Hospital Affiliated to Weifang Medical College.METHODS: Aborted embryo was collected and made into sections within 30 minutes. Fetal age was defined according to embryonic layer formation, somite number and organ development under a microscope. Sample sections with fetal age of 3-12weeks were selected. One was collected from every eleven sections and underwent immunohistochemical staining.MAIN OUTCOME MEASURES: Expression of alpha fetoprotein, CK19 and c-Met was measured in embryo hepatic stem cells aged 3-12 weeks.RESULTS: At 3-5 weeks, samples were positive for alpha fetoprotein and c-Met, which were indicated as hepatic stem ceils. At 10-12 weeks, alpha fetoprotein- and c-Met-positive cells were mainly distributed surrounding the header, which suggested that hepatic stem cells were mainly located at hepatic cord of the header. This had similar distribution as adult hepatic oval cells (adult hepatic stem cells). CK19-positive reaction was found at week 7, and mainly at hepatic cord cells, bile duct sheet cells and bile duct epithelial cells at 10-11 weeks. CKlg-positive reaction was only seen at the bile duct sheet and bile duct epithelial cells at week 12. At this time, all bile duct sheet cells and bile duct epithelial cells were positive for alpha fetoprotein, c-Met and CK19.CONCLUSION: CK19-positive reaction was not found in hepatic stem cells, but only detected in bile duct epithelial cells and progenitor calls. CK19 may be not fit for a marker of hepatic stem cells. All bile duct sheet and bile duct epithelial cells are positive for alpha fetoprotein, c-Met and CK19. It is assumed that alpha fetoprotein+/c-Met+/CK19+ may be bile duct progenitor calls.

Objective:To establish a method for measuring the activity of cornea epithelium quantitatively. Methods:Rabbit corneas were burnt either by alkali or by CO2 laser. The lamellar cornea was cut at the end of 1,2 and 3 weeks and cultured in 2 ml DMEM with 5% CO2, 37℃ for 1 h.Then 200 μl of MTT was added to the culture followed by incubation for another 4 h. The supernatant was discarded and 4 ml of DMSO was added into each culturedish for dissolving MTT completely under the condition of room temperature.200 μl of DMSO sample was added to each well of 96-well plate and each sample was triplicated. The absorbance of the plate was measured at 490 nm ultraviolet. Results:The D value of the burnt corneas was obviously lower than that of the normal ones(P<0.01). Conclusion:MTT method can be used to measure the activity of cornea epithelium quantitatively.