This paper reports a new solid self-emulsifying drug delivery system--self-emulsifying microsphere prepared by membrane emulsification technology with the hydrophobic berberine hydrochloride as a model drug. Solubility test and pseudo-ternary phase diagram were employed to select the optimal prescription of liquid self-emulsifying drug delivery system. The self-emulsifying microsphere was prepared by membrane emulsification technology with the solid carrier in a gel formed by sodium alginate and calcium chloride. The results showed that the optimal prescription of liquid self-emulsifying drug delivery system was Capmul MCM/Cremophor RH40/Labrasol/1-2propanediol = 20 : 32 : 32 : 16. The solid self-emulsifying microsphere had average diameter of 10.92 microm, encapsulation efficiency of 32.57% and the droplet size of reconstituted micromulsion of 156.5 nm. Berberine hydrochloride was dispersed in microsphere in non-crystalline form. In vitro release of the self-emulsifying microsphere showed pH response characteristics. These results indicated that the self-emulsifying microsphere prepared by membrane emulsification technology might become a new dosage form for poorly water soluble drugs.

AIM: To compare the visual effects of optimized aspheric transition zone Laser in situ keratomileusis (OAT z-LASIK )versus conventional Laser in situ keratomileusis (con. LASIK).METHODS: In a prospective study 44 patients (88 eyes)underwent OAT z -LASIK and 50 patients (92 eyes) received conventional LASIK surgery. Visual acuity,refractions、contrast sensitivity (CS),glare sensitivity (GS), and increment of Q-value after surgery were studied.RESULTS: All of operations on 94 cases were successful without severe complication after 3 months' follow-up. There was no significant difference in term of postoperative refractions between the two groups (t-test,P＞0.05). The uncorrected visual acuity (UCVA), CS, GS, and increment of Q-value of OAT z group were significantly better compared to the tradition group 3 months after the surgery (P＜0.05).CONCLUSION: OAT z - LASIK is a more effective procedure to improve visual quality compared to conventional LASIK.

Objective To compare the clinical efficacy of esomeprazole or omeprazole triple therapies on gastric ulcer patients complicated with type 2 diabetes mellitus.Methods Seventy-five patients with Hprelated gastric ulcer and type 2 diabetes mellitus were enrolled and were randomly divided into group A(n=39)and group B (n =36).Patients in group A were treated with esomeprazole,amoxicillin and clavulanate potassium dispersible tablets,Clindamycin.Patients in group B were treated with omeprasole,amoxicillin and clavulanate potassium dispersible tablets,Clindamycin.Patients in both groups were treated with hypoglycemic therapy.The efficacy and the Hp eradicate rate of the two groups were observed and compared.Results The cure effect in group A was 97.44％(38/39),much better than that of group B(80.56％(29/36);x2=5.598,P=0.025).The Hp eradicate rate in group A was 92.31％,also much better than that of group B(75.00％;x2 =4.172,P =0.041).Conclusion The clinical egicacy and the Hp eradicate rate of esomeprazole triple therapies on gastric ulcer patients complicated with type 2 diabetes mellitus is better than that of omeprazole triple therapies.Esomeprazole triple therapies and it is worthy of being clinically promoted.

AIM: Firstly to evaluate the changes of corneal sensation and its effect to dry eye syndrome after laser in situ keratomileusis (LASIK); secondly to evaluate the relation between the changes of corneal sensation and the laser ablation depth. ·METHODS: 30 patients (60 eyes) had bilateral LASIK with a superior-hinged flap. Every patient underwent preoperative and postoperative (after one week, one month and three months) evaluations, including corneal sensation, Schirmer's basic tear secretion test, tear breakup time (TBUT), corneal fluorescein stainting, and a questionnaire evaluating dry eye obtained from each patient.·RESULTS: Compared with preoperative level, after one week and one month, the difference of corneal sensation was very significant (P＜ 0.01); after three months, there was no statistical difference (P ＞ 0.05). After one week, there was no statistical difference (P ＞ 0.05) in the subjective dry eye symptoms, after one month, the difference was significant(P=0.025 ＜0.05) and after three months, the difference was very significant (P=0.001 ＜ 0.01). Compared with preoperative level, the basic tear secretion decreased significantly after one week and one month(P＜ 0.01), it did not return to the baseline level after three months (P ＜ 0.01). Tear breakup time decreased significantly after the surgery, and after three months, there was still statistical difference compared with preoperative level (P ＜ 0.01); with cornea fluorescence staining, we found corneal epithelial defect was most serious after one month after LASIK, and did not return to the baseline level after three months (P ＜ 0.01). Linear regression analysis and relevant were used to evaluate the relation between the changes of corneal sensation and the laser ablation depth (r=0.798, P ＜ 0.01). ·CONCLUSION: The central corneal sesation decreased noticeable after LASIK, and it recovered three months postoperatively, but the indicators of dry eye syndrome did not return to their preoperative levels following it. We have found that the decreasation of corneal sensation had positive correlation with the laser ablation depth.

Humans ; Occupational Diseases ; diagnosis ; Occupational Health ; Occupational Health Services ; United Kingdom

Low-frequency repetitive transcranial magnetic stimulation (rTMS) is a non-invasive brain stimulation method that has been used in the treatments of stroke patients. Our purpose was to investigate the effects of low-frequency rTMS on the hand motor function recovery for stroke patients. After searching from electronic database from January 1990 to April 2012, we collected randomized controlled trials explored the low-frequency rTMS effects on the hand motor function rehabilitation. A total of 7 comparisons (N = 216) from 5 articles were included in this study. We summarized the effect size by calculating the standardized mean difference (SMD). Summary of effect size (SES) indicated positive effects of low-frequency rTMS on the finger motor ability (SMD = 0.58) and hand function (SMD = -0.98). Few adverse effects occurred. The evidence showed that low-frequency rTMS could improve the paretic hand recovery after stroke.
Hand ; physiopathology ; Humans ; Recovery of Function ; Stroke ; therapy ; Transcranial Magnetic Stimulation

Amyloidosis ; complications ; pathology ; Heart Diseases ; etiology ; pathology ; Humans ; Male ; Middle Aged

OBJECTIVEThrough a simulation of interstitial fluid pressure (IFP), we developed an in vitro model to explore the change law of biological characteristics of adenoid cystic carcinoma (ACC) under different IFP.

METHODSA pressure cooker was refitted into a controllable pressure device. Cultured ACC-2 cells were subdivided into different groups, namely, negative control (untreated ACC-2) and experimental group (stressed for 3, 6, 12, 24 h under pressure of 7.551, 7.649, 7.747 kPa). CCK-8 and immunofluorescence of Ki67 were used to reflect proliferation ability. Transwell chamber assay was performed to observe the invasion ability of cells.

RESULTSThe proliferation ability was positively correlated with treatment time, and the peak value was obtained after the cells were subjected to 7.649 kPa of stress for 24 h. The invasion ability of ACC-2 cells was upregulated under stress.

CONCLUSIONWe successfully developed an in vitro model of IFP and found that high IFP can stimulate cell proliferation ability and upregulate invasion ability.

Objective To observe the change in memory of aged rats and the expression of alpha 4 acetylcholine receptor in hippocampus 5 h after inhalation of 1.2% isoflurane.Methods Fifty healthy adult and 50 aged SD rats were randomly divided into aged normal control group(A0),aged water labyrinth normal control group(WA0),1 day isoflurane aged water labyrinth group(WA1),3-day isoflurane aged water labyrinth group(WA3),7-day isoflurane aged water labyrinth group(WA7),adult normal control group(B0), adult water labyrinth normal control group(WB0),adult 1 day isoflurane water labyrinth group(WB1),3-day isoflurane water labyrinth group(WB3),and 7-day isoflurane water labyrinth group(WB7),10 rats in each group.Memory of rats in WA1,WA3,WA7 groups was detected 5 h after inhalation of 1.2% isoflurane while memory in rats of WB1,WB3 and WB7 groups was detected during the Morris water maze testing.The rats in A0,WA0,WA7,B0,WB0 and WB7 groups were killed on day 7 to detect the expression of ?4 acetylcholine receptor by Westernblotting for observation of changes in distribution of positive immune reaction cells in hippocampus.Results Water maze test showed that there was no significant difference in expression of alpha 4 acetylcholine receptor between WA0 and WB0 groups.However,the expression level of alpha 4 acetylcholine receptor was significantly lower in latent period of WA1 than in latent period of WA0,WB0 and WB7 groups(P

Objective To find a new material for biomedical scaffold.Methods Composite films from poly-L-lactic acid(PLLA)and opal powder were fabricated.Osteoblasts seeded on the composite films and control ones were examined.Cell densities and morphologies on these films were studied by scanning electron microscopy(SEM).Cell growth and differential function were assessed by 3-(4,5-dimethyltyiazol-2-yl)-2,5-diphenyl tetrazolium bromide(MTT)test.Results SEM study showed that the addition of powder could improve the adhesion between osteoblasts and the composite films.MTT test proved that cell proliferation was improved when opal powder was added.This improvement came from the negative ion given off by the opal powder.The negative ions either accumulate at the cell membrane or enter into the cells.Accumulation of negative ions at the cell membrane leads to a change of electric potential difference across the cell membrane which should be in a proper range for the cells to perform their normal physiological function.If the negative ions enter the cells,they may take part in biochemical reactions whenever possible.In this way,the ions also affect the cell normal metabolism.Conclusion Osteoblasts grow well on opal/PLLA composites and the negative ion from opal powder is responsible for the enhancement of cell growth.This study provides a new material for biomedical scaffold.