Objective: To investigate the role of extracellular signal-regulated protein kinase (ERK) in estrogen-induced proliferation and cell cycle transformation of breast cancer cell line MCF-7 and the related mechanisms. Methods: Estrogen receptor-positive breast cancer cell line MCF-7 was used in our study. The effects of 17β-E2 on the proliferation of MCF-7 cells was investigated by MTT assay to determine the optimal concentration of 17β-E2 for the following experiment. The effect of PD98059 on 17β-E2-induced proliferation of MCF-7 cells was measured by MTT assay to determine the intermediate concentration of PD98059. The cell cycle was analyzed by flow cytometry and telomerase activity was determined by Telomerase repeat amplification protocol PCR (TRAP-PCR) silver staining. The expression of wild-type p53 and phosphorylated ERK1/2 protein was determined by Western blotting and the expression of wild-type p53 mRNA was detected by RT-PCR. Results: ERK phosphorylation inhibitor PD98059 inhibited the proliferation of MCF-7 cells treated with 17β-E2 in a time- and dose-dependent manner(P<0.01). The intermediate concentrations of PD98059 were 89.28 μmol/L for 24 h, 39.81 μmol/L for 48 h and 21.87 μmol/L for 72 h. Treatment with 20 μmol/L PD98059 for 48 h reversed the promoting effect of 17β-estradiol on the cell cycle transformation of MCF-7, increasing the number of G1 phase cells and decreasing the number of S and M phase cells (P<0.01), inhibited the enhancing effect of 17β-E2 on the telomerase activity of MCF-7 cells(P<0.05), increased the protein expression level and genetic transcription of wild-type p53 (P<0.01), and decreased the expression of p-ERK1/2 protein(P <0.01). Conclusion: ERK plays an important role in 17β-E2-induced proliferation and cell cycle transformation of breast cancer cell line MCF-7, which might be related to the changes of genetic transcription of wild type p53 and telomerase activity.

Animals ; Cytotoxicity, Immunologic ; Down-Regulation ; Humans ; Influenza A Virus, H1N1 Subtype ; immunology ; physiology ; Influenza, Human ; immunology ; therapy ; virology ; Killer Cells, Natural ; immunology ; virology

Objective To investigate the expression and significance of Slit2 in different time point after the spinal cord injury of rats.MethodSeventy adult wistar rats were randomly divided into three groups: spinal cord injury by fully transection on T10 level spinal cord (Group A); laminectomy and the spinal cord uninjuried (Group B); natural without operation (Group C).Then the rats were sacrificed and the spinal cord was taken out fresh quickly on different time-point(12h, 1, 3, 5, 7d after operation). The tissues perfusion by formaldehyde were taken out on 3, 5, 7, 14d after operation. The expressions of Slit2 were tested by reverse transcription polymerase chain reaction (RT-PCR) and immunohistochemical measurement. By means of above,the author investigated the expressions and location of Slit2 after the spinal cord injury.All data were statisticsed by SPSS 11.5 software.ResultThe expression of Slit2 mRNA of appeared in the spinal cord tissue 12 hours after injury, reached peak on the 3rd day, declining gradually later. The positive expression of Slit2 located in the cytoplast on oligodendrocyte and astrocyte.The positive cells were found at 3d after spinal cord injury, reached peak on 7d after injury, declining after 14d. The change of Slit2 was correlative with the rehabilitation and regeneration of the axon on the forepart period.ConclusionAs an important factor in axonal growth-guidance,the author crewed that Slit2 may be participated in the regeneration and rehabilitation of axons after the spinal cord injury.

AIM: To discuss the effects of preoperative vitreous cavity injection of ranibizumab on 25G minimally invasive vitreoretinal surgery (VRS) in patients with proliferative diabetic retinopathy(PDR).METHODS: From February 2013 to December 2015,74 patients with PDR received VRS (82 eyes) were retrospectively analyzed.Patients were divided into VRS + IVR group and VRS group according to preoperative VRS treatment.VRS+IVR group: preoperative injection of ranibizumab (10mg / mL) at 3-5d before operation;VRS group: VRS only.We recorded VRS operation time,filling situation,iatrogenic retinal hole and so on.RESULTS: The operation time and coagulation times of VRS+IVR group were significantly lower than VRS group.The two groups in operation time and coagulation times were statistically significant (all P<0.05).In the VRS+IVR group,the number of cases of iatrogenic retinal hole and the use of silicone oil were lower than those of VRS group,the difference between the two groups was statistically significant (P<0.05).While the use number of C3F8 and perfusion fluid were not statistically significant (P>0.05).In VRS-IVR group within 3mo after operation,4 eyes appeared to vitreous body hematocele,VRS group was 13 eyes,the difference was statistically significant (x2=4.966,P<0.05).CONCLUSION: PDR patients with 25G minimally invasive VRS with preoperative therapy can reduce postoperative ocular bleeding,rate of retinal injury and silicone oil filling,shorten the operation time,the incidence rate and improve the success rate of surgery and reduce eye bleeding,postoperative complications such as adhesion.

Abstract Type 2 diabetes mellitus (T2DM) is characterized by long duration of disease and latent onset. Risk prediction models have shown potential for f early diagnosis and early treatment of diseases and formulation of targeted interventions. There is an increase in researches on risk prediction models for T2DM during the recent years, which provides the basis for precision tertiary prevention of T2DM; however, most studies suffer from problems of small sample size, complicated variables and difficulty in extensive applications. This review summarizes the risk prediction models for T2DM based on economic and easily available routine physical examination indicators, so as to provide insights into further studies on easy-to-perform and -popularize risk prediction models for T2DM.

This study is to determine the preventive effect and mechanism of targeting IL-17A on pulmonary inflammation and fibrosis after acute lung injury. Mice were treated with anti-IL-17A antibody on the day 7 and sacrificed on the day 14 after bleomycin lung injury. The pulmonary inflammatory status and the deposition of collagen were measured by HE and Sirius stains staining. The contents of hydroxyproline and collagen were measured by using commercial kits. The survival rate of mice was calculated by Kaplan-Meier methods. The inflammatory cytokines in bronchoalveolar lavage fluid were measured by ELISA and the expressions of inflammation-related molecules were detected by Western blotting assay. Targeting of IL-17A could prevent the development of lung inflammation, decrease collagen deposition and the contents of hydroxyproline, and protect against the development of pulmonary fibrosis, which together led to an increase in the animal survival. Moreover, blocking IL-17A decreased the expression ofpro-fibrotic cytokines such as IL-17A, TGF-beta1 and IL-13; increased the expression of anti-fibrotic or anti-inflammatory factors such as IFN-gamma, COX-2, 5-LOX, 15-LOX. Indeed, IL-17A antagonism suppressed the activation of pro-inflammatory p65NF-kappaB but enhanced the activation of pro-resolving p50NF-kappaB. In conclusion, that blockade of IL-17A prevents the development of pulmonary fibrosis from acute lung injury, is because blocking IL-17A may prevent acute inflammation converting to chronic inflammation.

Adolescent ; Adult ; Aged ; Carcinoma ; metabolism ; pathology ; Core Binding Factor Alpha 3 Subunit ; metabolism ; Female ; Humans ; Male ; Middle Aged ; Nasopharyngeal Neoplasms ; metabolism ; pathology ; Protein Array Analysis ; methods ; Young Adult

Aged ; Astragalus Plant ; Cerebral Infarction ; drug therapy ; Drug Combinations ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Phytotherapy ; Plant Extracts ; Platelet Aggregation ; drug effects ; Salvia miltiorrhiza

Objective:Differential expression analysis and cloning aged related genes of mouse thymus Methods:Different expressions of thymus mRNAs from 1 and 10 month old mouse were analyzed by DDRT PCR and different expression sequence tags (ESTs) were obtained One EST that represented high expressed level in one month mouse thymus was probed to screen mouse thymus cDNA library One 827 bp cDNA fragment was obtained and was extended to 1 406 bp by PCR Results:Homology analysis showed that mt22 1406 contained one 438AA coding region and showed high similarity with human elongation factor1?(EF1?) The Genbank accession number is BE241062 Conclusion:Cloning one gene related with mouse thymus aging

AIM: To research the application analysis of trabeculectomy combined with phacoemulsification treating patients with primary angle-closed glaucoma ( PACG) and cataract.
METHODS: Seventy-three patients from September, 2011 to September, 2013, with primary angle- closed glaucoma and cataract, were selected in our research. Patients were all treated with trabeculectomy combined with ultrasonic emulsification, and the therapeutic effect was observed.
RESULTS: The effects of trabeculectomy combined with phacoemulsification treating primary angle-closed glaucoma and cataract in reducing intraocular pressure were better, and postoperative visual acuity results of the research objects were satisfactory. And it could deepen the central anterior chamber depth effectively. All the research objects had few complications.
CONCLUSION: Trabeculectomy combined with phacoemulsification treating primary angle - closed glaucoma and cataract can achieve a good result for reducing intraocular pressure, postoperative visual acuity recovery and correction, and the surgical success rate is high, with low complication rates. It is worthy of widely clinical application.