Objective: To study the effects of Simvastatin on the proliferation and osteoblastic differentiation of human periodontal ligament (PDL) cells. Methods: The fourth passage human PDLs were cultured in conditioned mineralization medium with different concentrations of Simvastatin. Proliferation ability was detected by MTT method. Alkaline phosphatase (ALP) activity was measured with 4-nitrophenyl phosphate hexahydrate (PNPP) assay. Results: Proliferation and osteoblastic differentiation of human PDLs were increased in all treatment groups with different concentrations of Simvastatin(10-9, 10-8, 10-7, 10-6 mol/L). Compared with control group, significant statistical difference was found in 10-8 mol/L, 10-7 mol/L and 10-6 mol/L groups(P<0.05). The maximum effect was observed at the concentration of 10-7 mol/L. Conclusion: Optimal concentration of Simvastatin can improve the proliferation and osteoblastic differentiation of human PDLs.

Humans ; MicroRNAs ; Occupational Medicine

Objective To observe the efficacy and adverse effects of conventionally fractionated (CF) versus hypofractionated (HF) three-dimensional conformal radiotherapy (3DCRT) for hepatocellular carcinoma (HCC) with portal vein tumor thrombosis.Methods A retrospective analysis was performed on the clinical data of 65 patients with HCC suitable for 3DCRT from 2008 to 2012.These patients were randomly divided into HF group (n =32) and CF group (n =32).The HF group received 3DCRT at a total dose of 45-55 Gy (3-4 Gy/fraction,3-5 fractions/week),while the CF group at a total dose of 40-56 Gy (2 Gy/fraction,5 fractions/week).Results The follow-up rate was 100％.For the HF group and CF group,the short-term response rates were 72％ vs.55％ (P =0.034),the 1-year local control rates were 72％ vs.55％ (P=0.034),the 1-year overall survival rates were 59％ vs.45％ (P=0.042),and the numbers of individuals with grade 1-2 acute gastrointestinal reactions,deterioration of liver function,and radiation hepatitis were 14 vs.11,8 vs.8,and 1 vs.0,respectively (P =0.237).Conclusions HF 3DCRT is superior to CF 3DCRT in the treatment of HCC.

ObjectiveTo evaluate the value of bispectral index(BIS) monitoring during sedation in the ICU.Methods60 patients in ICU were randomly divided into three groups. By transfusing propofol and midazolam with injecting pump, the BIS of groups Ⅰ,Ⅱ and Ⅲ were controlled within 75～85, 65～75 and 55～65, respectively. ResultsCompared with the pre-sedation, there was no remarkable change in the patients of groups Ⅰ and Ⅱ after sedation(P>0.05)while there was remarkable change in the patients of group Ⅲ(P<0.05).The average score of Ramsay in groups Ⅰ, Ⅱ and Ⅲ were 2.2, 3.4 and 4.6 while the dose of propofol were (9.54±2.43) μg/kg·min, (12.69±3.12) μg/kg·min, (14.18±2.91) μg/kg·min and the dose of midazolam were (0.23±0.09) μg/kg·min, (0.25±0.07) μg/kg·min, (0.28±0.11) μg/kg·min, respectively.ConclusionThe application of BIS can make good judgement in the sedation, which showed different choices to different needs to obtain optimistical sedation effect.

ObjectiveTo study the effect of continuous blood purification (CBP) on the multiple organ dysfunction syndrome(MODS). MethodsContinuous blood purification were used in 33 patients with MODS. Results Among 33 patients,24 mended and 8 died. The scores of Acute Physiology And Chronic Health Evaluation (APACHE Ⅱ) and MODS obviously declined(P<0.05), as well as the BUN and blood Cr (P<0.05), but the bilirubin did not (P>0.05). The haemodynamic variables were stabilized during CBP and no obvious side-effect related to CBP was found. ConclusionThe therapy of continuous blood purification can improve the prognosis to the patients with multiple organ dysfunction syndrome. The patients were able to bear at the quality better.

Objective To analyze the popular characteristic and drug resistance of Pseudomonas aeruginosa in a hospital of Guiy-ang from January 201 1 to December 2013.Methods The distribution characteristic and drug resistance of Pseudomonas aeruginosa isolated from clinical samples from January 201 1 to December 2013 were analyzed retrospectively.Results A total of 642 strains of Pseudomonas aeruginosa were isolated for three years in our hospital from January 201 1 to December 2013,there was 57.0% isola-ted from sputum specimens,and 27.9% isolated from excreta of wound.The infected endemic area distribution was made up of Or-thopedic Surgery,ICU,Geriatrics Department and Respiratory Department accounting for 22.9%,20.1%,18.8% and 1 5.9% re-spectively.Pseudomonas aeruginosa was most sensitive to polymyxin bacillosporin.The drug resistance rates to Trimethoprim,Am-picillin and Cefazolin were all 100.0%.The drug resistance rates to Ampicillin/sulbactam and Ceftriaxone were 90.0%. Conclusion Pseudomonas aeruginosa is the main cause of lower respiratory tract infections in patients and wound infection and show serious multi-drug resistant,so it is necessary to use drugs reasonably according to the drug susceptibility results.

Objective To investigate the effects and relations of carvedilol on heart rate turbulence and secretion of sympathetic nerve in patients with myocardial infarction. Methods Sixty-six patients selected with acute myocardial infarction were randomized to enroll into experimental group ( n = 33 ) treated with earvedilol and control group( n = 33 ) treated with metoprolol for 12 months follow-up treatment. The concenrrarions of plasma norepinephrine(NE) and epinephrine (E) and 24 hour Holter monitoring were messured respectively before the treatment ,after 6 months and 12 months; and new cardiac events were supervised for all cases. Quantification of heart rate turbulenee(HRT) were carried out by computer analyzing two factors: turbulence onset(TO) and turbulence slope(TS) from the data of 24 hour Holter monitoring. NE,E,TO,TS and the occurrence rate of new cardiac events were compared between two groups and in different times of treatment. The correlation between TO,TS and NE,E was analysed. Results Before the treatment, there was no significant differences between two groups to the comparisons of NE,E,TO and TS(P＞0.05). After treating 6 and 12 months, NE, E and TO of experimental group were all lower than control group's significantly, accordingly TS were all higher(P＜0.05). By comparing 3 times( before,after 6 and 12 months of treatment), NE, E and TO of two groups dropped, meanwhile TS rose; experimental group showed significant changes( P＜0.05 ), but control group showed no significant differences(P＞0.05 ). The occurrence rate of new cardiac events of experimental group was lower than control group's significantly (P＜0.05 ).There was significant correlation between NE, E and TO, TS (P＜0.05 ). Conclusion Carvedilol treatment can block the secretion of sympathetic nerve after myocardial infarction and prevent the occurrences of new cardiac events significantly; the changes of the secretion of sympathetic nerve can play an important role for heart rate turbulence (HRT) ,the changes of HRT would be hopeful to predict new cardiac events alter myocardial infarction.

Exosomes are vesicular bodies secreted by living cells containing proteins and RNA, and play an important role in the process of physiology and pathology.Pancreatic cancer is one of the common gastrointestinal tumor with high morbidity and mortality.As a hotspot in oncology, exosomes have potential values in the research of development, diagnosis and treatment of pancreatic cancer.This article reviewed the role of exosomes in pancreatic cancer.

Objective To observe the effects of functional ambulation training in a realistic environment based on the activities of daily living among stroke patients with hemiplegia.Methods Thirty-two stroke survivors with hemiplegia were randomly divided into an experimental group and a control group,each of 16.Both groups were given routine rehabilitation training,while the experimental group was additionally given functional ambulation training based on the activities of daily living in a realistic environment for 60 min per day,five days a week for six weeks.Both groups were evaluated using the mini-mental state examination (MMSE),the Holden walking functional class assessment (HWFCA),the Berg balance scale (BBS),functional gait assessment (FGA),the 5 times sit to stand test (FTSST),the timed up and go test (TUGT),and rated using the specific activity balance confidence scale (ABC) and the modified Barthel index (MBI).Results Before the training,no significant differences between the two groups were found in terms of any of the measurements.After the six weeks of training,significant improvement was observed in all of the outcome measures except the MMSE and the HWFCA,with the experimental group scoring significantly better,on average,than the control group.Conclusion When combined with routine rehabilitation training,functional ambulation training based on the activities of daily living in a realistic environment can significantly enhance the functional gait,balance and postural control of stroke survivors.This should facilitate their activities in daily life and improve their confidence in maintaining their balance.

Objective To study the effects of carvedilol on the stability of plasma catecholamine in patients with post-acute myocardial infarction during consecutive periods. Methods Thirty-slx patients selected with acute myocardial infarction were randomized to experimental group treated with the nonselective beta-blocker earvedilol( n=18) and control group treated with the selective beta-blocker metoprolol(=18) for 12-months follow-up. In the two groups,the concentrations of plasma norepinephrine and epinephrine were measured before the treatment and after 2 months,4 months,6 months,8 mouths,10 months and 12 months and new cardiac events were supervised. Results After the treatment, in each point of periods, experimental group showed lower concentrations of plasma norepinephrine and epinephrine statistically than control group(P<0.05) ,and a stable dynamic change during 12 months of treat-ment( P>0.05 ) ;the occurrence rate of new cardiac events was lower significantly in experimental group than in con-trol group(P<0.05). Conclusion Carvedilol can decrease the spillover of sympathetic nerve, control more stably cardiac sympathetic nerve activity and then decrease more sharply the occurrence rate of new cardiac events in pa-tients with acute myocardial infarction than metoprolol.