Objective To research the effects of metformin on proliferation and apoptosis in human breast cancer MCF-7 cells and investigate the role of Foxp3 in the effect.Methods The inhibit rate of MCF-7 cells was measured by MTT assay after 48 h metformin treatment(5 mmol/L、10 mmol/L、20 mmol/L).Metformin-induced cell apoptosis was measured by Hoechst 33258 stai-ning and flow cytometry.The expression levels of Foxp3 and caspase-3 mRNA were detected by real-time PCR.Expression of Foxp3 protein was detected by Western blot.Results Metformin markedly inhibited proliferation of MCF-7(P<0.05)compared with control group.And the early apoptotic rates increased to 3.76%,8.96%,and 18.67% with 5 mmol/L、10 mmol/L、20 mmol/L metformin treatment,respectively.Metformin increased caspase-3 mRNA expression levels,and decreased the expression levels of Foxp3 mRNA and protein expression levels(P<0.05,vs.control).Conclusion Metformin could inhibit the proliferation and in-duce apoptosis of MCF-7,and its mechanism maybe related to down-regulated expression of Foxp3.

Aim Subcortical ischemic vascular demen-tia ( SIVD ) induced by chronic hypoperfusion due to small-artery disease is a common cause of vascular de-mentia ( VaD) , which is recognized as the second most prevalent type of dementia. The aim of this study was to determine whether carnosine played a protective role in cognitive impairment induced by permanent occlu-sion of the right unilateral common carotid arteries ( rUCCAO ) in SIVD. Methods Adult male mice ( C57BL/6 strain ) were subjected to rUCCAO, and treated with carnosine or saline. Locomotor test, open field test, hot plate test, freezing test and Morris water maze were performed after rUCCAO. Results There were no differences among rUCCAO group, carnosine group and sham group for total distance traveled in lo-comotor test. In the open field test, carnosine (200, 500 mg · kg-1 ) significantly revised the decrease of latency spent in the center induced by SIVD . There were no differences between rUCCAO and sham groups for the pain threshold. In freezing test, rUCCAO in-duced a significant reduction in content memory, which was completely reversed by treatment of carnosine. In Morris water maze training trials, rUCCAO-treated mice showed prolonged escape latency in acquisition phase, carnosine ( 200, 500 mg · kg-1 ) markedly shortened the escape latency. Conclusion These data suggest that carnosine has a neuroprotective effect on cognitive impairment induced by rUCCAO in mice.

Objective To clinical analyze the changes of ocular anterior segment structure using ultrasound biomicroscope(UBM) and their clinical values in blunt eye injury.Methods Sixty-nine eyes with no-opening wound in blunt eye injury were examined by UBM(Paradigm Model P40).Scanning photography of central and 3,6,9,12 clock hour were recorded and printed,other clock hours were scanned if needed.These records were studied with clinical findings.Results UNM findings showed that 27 eyes had hyphema,22 eyes had anterior chamber angle recession,16 eyes had iridodialysis,19 eyes had local luxation of lens,5 eyes had vitreous henia in anterior chamber,19 eyes had cyclodialysis,23 eyes anterior choroidal detachment and 9 eyes had anterior vitreous haemorrhage.Of the 69 eyes,62 eyes had combined structure changes showed above,which account(89.9)%.Conclusions UBM is a practical tool for diagnosis of anterior segment structure changes in blunt eye injury,especially when there are corea opacity,hyphema,cyclodialysis,ocular hypotension and others.It can provide exact informations for the diagnosis and treatment,which can not be showed by routine ocular examination and B-scanning ultrasonography.

Adult ; Arrhythmogenic Right Ventricular Dysplasia ; physiopathology ; Electrocardiography ; Humans ; Male ; Middle Aged

Objective To investigate the changes of parathyroid hormone receptor in patients with different stages of renal disease and its possible underlying mechanisms. Methods Relatively quantitative RT/PCR method was used to detect PTH receptor mRNA expression in renal specimens obtained through biopsy or operation. Results The levels of PTH receptor mRNA were significantly decreased in all patients with chronic glomerulonephritisx moderate renal failure severe renal failure and acute renal failure, which was correlated with the extent of renal impairment. Conclusion The downregulation of renal PTH receptor occurs much earlier than the changes of renal function., plasma PTH., serum phosphate and calcium in the course of human renal disease.

Objective To clone and express recombinant outer membrane protein P6, determine its optimal expression conditions and to investigate the immunoprotective effects of the P6 protein on mice. Methods The P6 gene of nontypeable Haemophilus influertzae(NTHi) was amplified by PCR from the NTHi genome and cloned into expression vector pET-32a (+) to generate the pET-32a-P6 recombinants. They were confirmed by nuclease digestion and sequence analysis. The verified recombinant was transformed into E. coli BL21 (DE3). Its optimal expression conditions were determined such as engineering strains, the concentration of IPTG, inducing temperature, inducing time, different medium etc. The recombinant protein was purified by Q Sepharose~(TM) XL ion exchange and gel filtration chromatography. The protein was analyzed by SDS-PAGE, Western blot and sequencing. BALB/c mice were immunized with recombinant protein be-fore challenged by NTHi through intraperitoneal injection. Then the mortality rate of different group was com-pared. Results The recombinant P6 of NTHi was successfully constructed and expressed in E. coli at a rel-atively high level. The purity was up to 95% after purification. The relative molecular mass of the protein is 14 145. 848. The recombinant protein was confirmed to show specific reaction on the antiserum through Western blot. The animal experiments showed the mortality rates of immunization groups were significantly lower than that of the control group (P < 0.05). Conclusion The successful expression of the recombinant P6 will be very helpful for the further study on development of vaccine, its purified, immunological activity and antibody preparation.

Objective To investigate the effects of propofol on the changes in myocardial Toll-like receptor 4 (TLR-4)and TNF-αand NF-κb protein expressions in ischemia-reperfusion injury (I/R).Methods Thirty healthy male SD rats weighing 250-320 g were randomly divided into 3 groups (n=10 for each):Group A,sham operation;Group B,I/R;and Group C,propofol + I/R.In Groups B and C myocardial I/R was induced by occlusion of the left anterior descending artery (LAD)for 30 min,followed by 120 min reperfusion.In Group C propofol was given intravenously 1 0 min before myocardial ischemia,followed by continuous infusion of propofol at 5 mg/(kg·h)until the end of 120 min reperfusion.In Groups A and B normal saline instead of propofol was given. The myocardial tissues were taken at the end of 120 min;ultrastructural changes of myocardial cells were observed under X-ray electron microscope and the expressions of TLR-4 mRNA as well as TNF-αand NF-κb protein were determined.Results Ultrastructural observation under electron microscope showed significantly worsened damage in myocardial tissue structure and mitochondria in Groups B and C compared with Group A.The myocardial expressions of TLR-4 and TNF-αand NF-κb protein were significantly higher in Groups B and C than in control Group A.The myocardial expressions of TLR-4 and TNF-αand NF-κb protein were down-regulated in Group C compared with Group B.Conclusion Intravenous injection of propofol can protect against myocardial damage.Propofol can suppress the increase in myocardial TLR-4 and TNF-αand NF-κb protein expressions induced by I/R.

The apparatus for intrinsic dissolution test recorded in United States Pharmacopeia (USP) integrating with fiber-optic drug dissolution test system (FODT) were used to real-time monitor intrinsic dissolution processes of alliin in four media which were water, solution of HCl with pH 1.2, buffer solution of acetate with pH 4.5, and buffer solution of phosphate with pH 6.8. The intrinsic dissolution rate (IDR) and the similarity factor (f2) of two intrinsic dissolution curves with two apparatuses were calculated. The IDR values of alliin with rotating disk system were 28.1.3, 33.55, 28.38 and 30.95 mg x cm(-2) x min(-1) in four media, respectively. And the IDR values of alliin with stationary disk system were 44.16, 47.07, 45.11 and 51.34 mg x cm(-2) x min(-1), respectively. The similarity factors were 56.42, 50.75, 40.30 and 40.64, respectively. The results showed that the intrinsic alliin dissolution rates were much greater than 1 mg x cm(-2) x min(-1). It inferred that alliin dissolution would not be the rate limiting step to absorption.

Objective To find out and clarify the causes and the pathogens of vulvovagmitis in childhood girls, to determine the clinical treatment. Methods There were 345 cases of childhood girls .ranged from 18 days to 12 years, with symptoms of vulvovagini tis, and their vaginal secretions were examined by routine smear for cleaning degree, trichomonas , Candida and clue cells, gram-stain for neisseria gonorrhoeae, culture for bacteria, mycoplasma urealytium, mycoplasma hominis and chlamydia trachomatis. Results One hundred and nine pathogens were detected(31.6% of the whole cases ), including specific pathogen 70 cases(20. 3% )and non-specif ic pathogen 32 cases(9.3%). Gardnerella was detected most frequently in specific pathogen while enteric bacilli was detected most frequently in non-specific pathogen. Conclusions Non-specific vulvovaginitis is the most frequent cause in childhood vulvovagimtis, and bacterial vaginosis is the mast frequent in specific infection. Symptomatic treatment is effective, but antibiotic treatment should be based on pathogenic findings of vaginal secretions.

Objective:To explore the relationship between loneliness and attachment in college students and the mediating effect of rumination.Methods:Totally 545 students [239 males,306 females;average age (20 ± 3) years] were assessed with the Russell UCLA Loneliness Scale (UCLA),Experiences in Close Relationships Inventory (ECR,including attachment avoidance and attachment anxiety) and Nolen-Hoeksema Ruminative Response Scale (RRS).The structural equation model was used to research the mediating effect of rumination on relationship between loneliness and attachment.Results:The scores of UCLA,ECR and RRS were positively correlated each other (r =0.30,0.20,0.44,Ps ＜ 0.01) in college students.The inspection of the mediating effect found fit indices for hypothetical model were acceptable (x2 =16.69,df=5,NFI =0.98,IFI =0.99,TLI =0.96,CFI =0.99,AGFI =0.96,RMSEA =0.07).Path analysis revealed that attachment avoidance and attachment anxiety predicted directly loneliness (β =0.10,0.06) and rumination (β =0.05,0.16),and predicted loneliness by rumination (β =0.18).Conclusion:The rumination may be associated with loneliness and individual attachment and play a partial mediating effect between loneliness and attachment in college students.