BACKGROUND:Currently, bioactive glass and polylactic acid have been used in clinical dentistry and plastic surgery; however, their therapeutic outcomes are not satisfactory, because the material properties have some limitations. OBJECTIVE:To explore the cytocompatibility of oxygen plasma-treated polylactic acid and bioactive glass guided bone regeneration membrane. METHODS:Bioactive glass and polylactic acid were used as the basic materials to prepare polylactic acid membrane, polylactic acid and bioactive glass composite membrane and oxygen plasme-treated polylactic acid and bioactive glass composite membrane, al of which were used to culture MG63 cels. Cel adhesion rate, cel proliferation rate and alkaline phosphatase activity of MG63 cels on these three kinds of membranes were observed. RESULTS AND CONCLUSION: With the growth of time, in these three groups of membranes, the cel adhesion rate and cel proliferation rate were al significantly increased. Alkaline phosphatase activity showed a decreasing trend after the first increase, and reached its peak at the 7thday of culture. The cel adhesion rate and cel proliferation rate in oxygen plasma-treated polylactic acid and bioactive glass group were significantly higher than those in the other two groups, while the cel adhesion and proliferation rates in polylactic acid and polylactic acid and bioactive glass groups were similar. At the 3rd day of culture, the alkaline phosphatase activity in the polylactic acid and bioactive glass group and oxygen plasma-treated polylactic acid and bioactive glass group was significantly higher than that in the polylactic acid group. At the 7th and 14th days, there was no significant difference in the alkaline phosphatase activity among these three groups. These results show that oxygen plasma-treated polylactic acid and bioactive glass composite membrane has good biocompatibility, which can better promote cel adhesion, proliferation and matrix secretion from osteogenic cels.

With the development of science and technology, new medical equipments is toward the direction of intelligent and portable. In order to assist medical personnel to patients with blood, developing from previous devices, a new kind of vein locating projection instrument based on two-dimensional scanning mirror is put forward. It can scan and project vein image using a scanning mirror. The related algorithm is also be improved, make vein scan projection more practical. The system finally set up can perform well in vein scan projection.
Algorithms ; Diagnostic Imaging ; instrumentation ; Humans ; Veins ; anatomy & histology

The background,features,dimension and contents of 22 international appraisal tools for clinical guidelines were analyzed,and their history,evolution,rules and problems were described,in order to provide the evidence for developing appraisal tools for domestic clinical guidelines. In the study,it was found that the guideline evaluation tools have been classified and there is a constant strive to achieve the balance between comprehensiveness and practicability. But the existing evaluation tools are insufficient for clinical practical contents of guidelines. The scoring system should be improved. In addition,conflicts of interest,value choice and patients' involvement should be considered increasingly, and should become an important part of the guideline evaluation tools.

The effects of quercetin-3-O-β-D-glucuronide (Q3GA)on the triglyceride metabolism and oxidative stress in steatotic HepG2 cells and the underlying mechanism were investigated in this study.Significant fat accu-mulation was documented by Oil Red O staining;intracellular triglyceride levels were detected by triglyceride(TG)enzymatic assay.DCFH-DA staining assay was performed to observe reactive oxygen species (ROS)pro-duction of HepG2 cells.The level of malondialdehyde(MDA)and superoxide dismutase(SOD)were assayed by thibabituric acid method and xanthine oxidase method.Changes in the mRNA expression of peroxisome prolifera-tor-activated receptorα(PPARα);carnitine palmitoyltransferase 1 A(CPT1 A);medium chain acyl-CoA dehydro-genase (MCAD);cytochrome P450 4A11(CYP4A11)and acyl-CoA oxidase(ACO);which are related with fatty acid oxidation were assessed by RT-PCR.Our results showed that Q3GA obviously reduced fat deposition and TG content.At the same time;Q3 GA decreased MDA content and significantly increased the SOD activity with reduced ROS production.Moreover;the PPARα;CPT1A;MCAD expression-related fatty acid βoxidation was upregulated with the treament of Q3GA;while without any change of the expression of CYP4A11;ACO.In conclu-sion;Q3GA prevents FFA-induced HepG2 cell steatosis;and enhances mitochondrial fatty acidβoxidation;which may partly be related to its anti-oxidation ability.

2～3 cm). MVC of preoperative bioptic specimens will help to choose the length of distal clearance.

Objective To investigate the distribution of anxiety and depression disorders in patients of carotid artery stenosis (CAS),and the relationship between symptoms of cerebral infarction and the severity of anxiety and depression.Methods We used Self-Rating Anxiety Scale (SAS) and Self-Rating Depression Scale(SDS) created by William W.K.Zung to evaluate the anxiety and depression disorders associated with CAS in 93 patients hospitalized at the Department of Vascular Surgery,and 146 hospitalized varicose veins patients as acontrols.Results The scales of CAS are significantly higher than the control group(SAS:32 ± 8 vs 29 ± 7,P ＜ 0.001 ; SDS:42 ± 14 vs 35 ± 11,P ＜ 0.001),within-group analysis of CAS shows that there is no statistical difference between symptomatic group and non-symptomatic group (SAS:32 ±8 vs 32 ± 7,P =0.780; SDS:41 ± 14 vs 42 ± 14,P =0.830),or between infarction group and non-infaction group (SAS:31 ± 8 vs 33 ± 8,P =0.147; SDS:39 ± 14 vs 43 ± 13,P =0.241).Conclusions CAS can cause anxiety and depression disorders,and the disorders are not related to symptoms of cerebral ischemia and cerebral infarction.

Objective To evaluate the effect of domestic wire-reinforced epidural catheter on the occurrence of adverse events during epidural block.Methods Three hundred ASA Ⅰ or Ⅱ patients of both sexes,aged 18-64 yr,weighing 41-78 kg,scheduled for elective operations under combined spinal-epidural anesthesia,were randomly divided into 3 groups (n =100 each):polyvinyl chloride epidural catheter group (group A),imported wire-reinforced epidural catheter group (group B) and domestic wire-reinforced epidural catheter group (group C).Combined spinal-epidural anesthesia was performed routinely.The corresponding epidural catheter was inserted in each group.The catheterization without difficulty,paresthesia during catheterization,the number of patients in whom blood or cerebrospinal fluid was withdrawn from the epidural catheter,intravascular catheter insertion,injection obstruction,easiness during removal of the catheter,bleeding after removal,postoperative paresthesia and epidural hematoma within 1 week after operation were recorded.Results Compared with A group,the incidences of paresthesia during catheterization,the number of patients in whom blood or cerebrospinal fluid was withdrawn from the epidural catheter,injection obstruction and postoperative paresthesia were significantly decreased (P ＜ 0.05),and no significant change was found in the other parameters in B and C groups (P ＞ 0.05).There was no significant difference in all the parameters between B group and C group (P ＞ 0.05).Conclusion Domestic wire-reinforced epidural catheter can decrease the occurrence of catheterization-induced damage to the nerve and blood vessels and the efficacy is comparable with that of imported wire-reinforced epidural catheter.

Objective To compare the circumferential approach and suprapubic approach for correcting the concealed penis. Methods Thirty-four patients received circumferential approach (group A,18 cases)or suprapubic approach(group B,15 cases)randomly for the concealed penis.The length of penis without erection before and after surgery treatment,patients'satisfaction and surgical complications were evaluated.All the patients were followed at least 6 months after operation.Results The penile length before and after surgery in group A were(1.78±0.41)cm vs(3.97±0.47)cm,the length of the postoperative penis was significantly longer than that of the preoperative penis(P<0.01).83%of those in group A(15 cases)were satisfied with the cosmic results.The length of preoperative and postoperative penis in group B were(2.07±0.53)cm vs(4.05±0.81)cm respectively,the length of the postoperative penis was significantly longer(P<0.01).Satisfaction was 87%(13 cases).The postoperative penile length between the 2 groups was not different(P> 0.05).Prepuce edema was reported to Occur in 56%and 13%in group A and group B and spontaneously disappeared within 3 months.Fat synchysis occurred in 2 of group B. Conclusions The cosmic effect of the 2 surgical approaches is similar,but circumferential approach is simpler.There is no serious complication in those receiving circumferential approach.

AIM: To investigate the changes in nNOS and iNOS expression of hippocampal CA3 pyramidal neurons and NO - 2/NO - 3 level of hippocampal homogenate of rats induced by stress, and to explore the effect of phenytoin on them. METHODS: Rats were subjected to forced-swimming stress, phenytoin was administered(ip) at 30 min before stress. Using the immunohistochemistry and the computerized image technique, the expression levels of nNOS and iNOS of rat hippocampal CA3 pyramidal neurons were assayed quantitatively, and the NO - 2/NO - 3 level of hippocampal homogenate was also measured using nitric acid deoxidize enzyme method. RESULTS: The nNOS average grey degree of hippocampal CA3 pyramidal neurons was significantly lower in stress group (155 42?3 77)than that in control group(164 54?4 62)and in stress plus phenytoin group(164 27?2 55)( P

This study aimed at exploring the effects of Guttiferone K (GUTK),a compound isolated from G.yunnanensis,on inhibiting the proliferation of pancreatic cancer cells both in vitro and in vivo.MTT assay was used to detect the inhibitory effects of GUTK on the proliferation of five human pancreatic cancer cell lines.Western blot was adopted to detect the apoptosis-related protein expressions of Caspase-3,poly adenosinediphosphate-ribose polymerase (PARP) and Bcl-xL.For in vivo study,the human pancreatic cancer cell MIA PaCa-2 was orthotopically injected into the pancreatic tail of the orthotopic mice.One week later,GUTK was administered by intraperitoneal (i.p.) injection every other day for 4 weeks.The volume and weight of the tumor tissue were measured.The protein expression level of cleaved caspase-3 in tumor tissue of all the groups was quantified by immunohistochemistry.As a result,it was found that GUTK effectively inhibited the proliferation of the five human pancreatic cancer cell lines at a low concentration.GUTK induced caspase-related apoptosis by triggering a series of events in MIA PaCa-2 cells including cleaved Caspase-3 and PARP activation,Bcl-xL down-regulation,and eventually cell death in a time and dose dependent manner.Furthermore,in vivo study revealed that intraperitoneal injection of GUTK significantly suppressed the growth of pancreatic cancer cells in the orthotopic mouse models,and the protein level of cleaved caspase-3 was increased in the GUTK and gemcitabine treated groups.It was concluded that GUTK induced apoptosis in human pancreatic cancer both in vitro and in vivo,and was potential to develop into a clinical anticancer agent.