Atherosclerosis is a kind of participation of multiple factors,complicated chronic lesions.It has become a threat to people's life and health,with the deepening of the research,this paper summarizes the risk factors of the newly discovered in recent years,with the risk factors causing atherosclerosis for more targeted prevention and control measures.

Objective To investigate the effect of 17?-Estradiol(E 2)on the proliferation cycle of human mucoepidermoid carcinoma Mc3 cells. Methods Mc3 cells were processed with various concentrations of E 2 for various durations. Then, cell proliferation and cell cycle distribution were examined by MTT assay and flow cytometry; CyclinD1 and P27 Kip1 expressions were assessed with immunohistochemistry. Results After being exposed to E 2 in concentrations of 10 -9,10 -8 or 10 -7mol/L for 5 days, the proliferation of the Mc3 cells was enhanced by 29%,54% and 59% respectively, CyclinD1 expression was increased by 16%,19% and 24%, And P27 Kip1 expression was decreased by 33%,30% and 55%, respectively. Compared with the control group, the number of cells in S phase increased by 11.3%,6.6% and 46.7% after the Mc3 cells were exposed to E 2 in the concentration of 10 -7mol/L for 12h,18h or 24h, and the proliferation index(PI) was also increased by 6.0%,3.6% and 205.0% respectively. Conclusion Physiological concentration of E 2 may promote Mc3 proliferation by increasing the expression of CyclinD1 and decreasing the expression of P27 Kip1, thereby stimulate the growth and development of the tumor.

Objective To evaluate the role of p38 mitogen-activated protein kinase (p38MAPK)-heat shock protein 27 (HSP27) signaling pathway in attenuation of lipopolysaccharide (LPS)-induced acute lung injury (ALl) by dexmedetomidine in mice.Methods Forty male Kunming mice,aged 2 months,weighing 20-25 g,were equally and randomly divided into 4 groups using a random number table:control group (group C),LPS group,low-dose dexmedetomidine + LPS group (group D1),and high-dose dexmedetomidine + LPS group (group D2).Dexmedetomidine 25 and 50 μg/kg were injected intraperitoneally in D1and D2 groups,respectively,and 1 h later LPS 5 mg/kg was injected intraperitoneally.At 6 h after LPS injection,the left lung was lavaged,and broncho-alveolar lavage fluid (BALF) was collected for determination of concentrations of protein,tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β).The right lung was removed for examination of the pathological changes (under the light microscope) and for detection of expression of phosphorylation of p38MAPK (p-p38MAPK),p38MAPK,phosphorylation of MAPK-activated protein kinase 2 (p-MAPKAPK-2),MAPKAPK-2,phosphorylation of HSP27 (p-HSP27) and HSP27 in lung tissues.The wet to dry lung weight (W/D) ratio was calculated.The ratios of p-p38MAPK/p38MAPK,p-MAPKAPK-2/MAPKAPK-2 and p-HSP27/HSP27 were calculated.Results Compared with group C,the W/D ratio,concentrations of protein,TNF-α and IL-1β in the BALF,and ratios of p-p38MAPK/p38MAPK,p-MAPKAPK-2/MAPKAPK-2 and p-HSP27/HSP27 were significantly increased in group LPS.Compared with group LPS,the W/D ratio,concentrations of protein,TNF-α and IL-1β in the BALF,and ratios of p-p38MAPK/p38MAPK,p-MAPKAPK-2/MAPKAPK-2 and p-HSP27/ HSP27 were significantly decreased in D1 and D2groups.The pathological changes of the lung were significantly reduced in D1 and D2 groups as compared to LPS group.Conclusion Dexmedetomidine attenuates LPS-induced ALI in mice possibly through inhibiting p38MAPK-HSP27 signaling pathway.

Objective To evaluate the effects of oral motor interventions on feeding performance of preterm infants with feeding and swallowing disorders. Methods According to the bed number, the premature infants were divided into two groups in equal number: the control group received non-nutritive sucking for 30 minutes before feeding , while the experiment group infants received oral motor interventions. The proficiency and volume transfer were observed and recorded. Result The proficiency and volume transfered in the experiment group were significantly better than those of the control group (P<0.05). Conclusion The oral motor interventions can effectively improve the feeding performance in preterm infants with feeding and swallowing disorders.