BACKGROUND:There is no design that can completely rule out the intermittent impact damage to implants, therefore, a new bal attachment-retained implant system is constantly updated and developed. OBJECTIVE:To evaluate the clinical effectiveness of an implant-supported mandibular overdenture retained with a bal attachment. METHODS: We searched the Cochrane Library, PubMed, Medline, EM-base, WanFang Data, CNKI, VIP and other databases by computer to colect randomized controled trials addressing the implant-supported mandibular overdenture retained with a bal attachment and other control methods for dentures. The time limit was from database creation to February 2014. Two researchers independently completed literature screening according to inclusion and exclusion criteria, data extraction and quality assessment. RevMan 5.1 software was used for meta-analysis. RESULTS AND CONCLUSION: There were 10 studies included in result analysis, including 7 from China and 3 from other countries. Analysis results showed that statistical heterogeneity was remarkable in included studies, and there was no significant difference in patient’s satisfaction, clinical and objective indicators, and complications, suggesting that this approach continues to be explored in clinic. The implant-supported bal attachment-retained mandibular overdenture is relatively expensive, which is identical with the current research progress that is in the exploration stage worldwide. Due to the limited quantity and quality of included studies, the conclusions of this systematic review only provide references for clinical practice and research. The implant-supported bal attachment-retained mandibular overdenture stil needs further exploration and improvement.

BACKGROUND:Recent studies have shown that osteoclast differentiation factor is closely related to osteoclast differentiation, formation and function in bone remodeling during orthodontic tooth movement. OBJECTIVE:To observe the effects of three kinds of orthodontic appliances on the expression of osteoclast differentiation factor at the pressure side of rat periodontal tissue during remodeling process and to explore the biocompatibility of the orthodontic appliances with the host tissues during orthodontic treatment. METHODS:Eighty healthy Wistar rats were selected to establish animal models of orthodontic tooth movement, and then randomly divided into four groups: control group, MBT group, Begg group, Damon Ⅲ appliance group. Four animal from each group were sacrificed at 3, 7, 14 days after wearing orthodontic appliances. The tartrate-resistant acid phosphatase staining was used to count the osteoclasts at the pressure side of alveolar bone tissue; real-time quantitative PCR detection to detect mRNA expression of osteoclast differentiation factor at the pressure side of periodontal tissue and time distribution characteristics. RESULTS AND CONCLUSION:Compared with the control group, the number of positive osteoclasts and mRNA expression of osteoclast differentiation factor at the pressure side of the alveolar bone tissue were increased with orthodontic time, reached the peaked at 7 days and then gradualy decreased. The number of positive osteoclastsand mRNA expression of osteoclast differentiation factor at the pressure side of the alveolar bone tissue were significantly higher in the Damon Ⅲ group than the other three groups at 7 days after orthodontic treatment (P < 0.05). These findings indicate that, during the bone remodeling, the number of positive osteoclasts changed in accordance with the mRNA expression of osteoclast differentiation factor, and at 7 days, the number of positive osteoclasts and mRNA expression of osteoclast differentiation factor were highest in the Damon Ⅲ group.

OBJECTIVE: Nuclear factor (NF)-?B is an inducible transcription factor detected in neurons, glial and neural stem cells. It is involved in many biological processes such as inflammation and innate immunity, development, apoptosis and anti-apoptosis. This text is aimed to explain the roles of NF-?B in proliferation, migration and differentiation of neural stem cells. DATA SOURCES: The related literatures between January 1987 and September 2006 were collected from the PUBMED with the keywords of "Neural stem cell, Proliferation, Migration, Differentiation/stem cell, Differentiation/NF-?B" in English. STUDY SELECTION: Firstly the articles were checked and quotations attached to these articles were looked over. Inclusive criteria: the content of the articles must be correlated with roles of NF-?B in proliferation, migration, differentiation of neural stem cell. Exclusive criteria: Repetitive research or articles of Meta analysis. DATA EXTRACTION: There were 61 correlated articles, 32 articles accorded with inclusive criteria, and 29 articles excluded were olden or repetitive in content. In 32 collected articles, 4 articles referred to adult neural stem cell, 3 articles referred to NF-?B/Rel family and Ⅰ-?B, 11 articles referred to NF-?B and proliferation of neural stem cell, 8 articles referred to NF-?B and migration of neural stem cell and 6 articles referred to NF-?B and differentiation of neural stem cell. DATA SYNTHESIS: Neural stem cells were characterized by the capability to undergo self-renewal, cell divisions, to migrate and to differentiate into multiple cell types. Stem cells within the adult brain were found within special areas. Neural stem cells experienced the processes of dissociation, immigration and differentiation. NF-?B was a transcription factor, which can bind to specific DNA-sequences and regulate transcription. NF-?B was involved in induction of proliferation under erythropoietin (EPO), hypoxia conditions and brain injury. The inhibitors of NF-?B such as beta-peptide, nitric oxide acted in negative manner on proliferation of neural stem cells. In migration of neural stem cell, NF-?B was necessary for induction of migration caused by macrophage chemo attractant protein-1, stem cell factor, stromal cell derived factor. The differentiation of neural stem cells toward astrocytic, neuronal, oligodendrocytic and glial lineages was determined by specific signaling cascades. Interleukin-6 family could accelerate the differentiation of neural stem cells to horizontal cells. The differentiation of neuroblastoma cells could be joined by NF-?B. CONCLUSION: A great quantity of evidences verifies that NF-?B plays a crucial role in the complicated regulatory mechanism of transcription of neural stem cells.

ObjectiveTo observe the effect of ulinastatin on the survival and lymphocyte apoptosis in mice with cecal ligation and puncture(CLP) induced sepsis, so as to investigate the possible mechanism of ulinastatin action in sepsis. MethodsForty 8-10 weeks old Methods Forty8?10weeksoldmaleC57BL/6mice(22?30gbodyweight)wererandomlyassignedtofourgroups,i.e.,Sham group,CLP group,CLP plus UTI ip group (100000U/kg by intraperitoneal injection at half an hour after operation),and CLP plus UTI iv group(100000U/kg by intravenous injection at half an hour after operation).After success ful establishment of CLP model,the7-daysurvivalofthe10animalsineachgroupwasobservedandthesurvivalcurvewasalsoplotted.Basedon the 7-day survival of animals,another 40 mice were divided into the above 4 groups and specimens were collected 24h after CLP to examine the lymphocyte count in the peripheral blood, thymus and spleen and theapoptosis of lymphocytes in the thymus and spleen.The statistical analyses were done with Prism 5.01(Graph Pad Software, USA).Results The 7-day survival ratesin the two UTI groups were significantly higher than that in the CLP group(P<0.05).The lymphocyte count sin the two UTI groups were significantly higher than that in the CLP group (P<0.05),and the lymphocyte apoptosis rates in the two UTI groups were significantly lower than that in the CLP group(P<0.05).The above parameters were not significantly different between the two UTI groups.Conclusion Both intraperitoneal and intravenous treatment with UTI can greatly improve the survival of septic mice,which might be related to the roles of UTI inincreasing the lymphocytes count in the peripheral blood, thymus and spleen of septic mice and in alleviating lymphocyte apoptosis in the thymus and spleen.

AIM:To investigate the inhibitory effect of rabbit lens epithelial cell(RLEC)survival and growth by propylene glycol mannate sulfate(PGMS)on the rabbit capsular bag in vitro.METHODS;Capsular bags were prepared from rabbit eyes after extracapsular cataract extraction(ECCE)and incubated in 0.2,0.4,0.8g/L PGMS in 2,5,10 minutes incubation periods.After treatment,the capsular bags were cultured for 7 days in Dulbecco minimum essential medium(DMEM)supplemented with 50mL/L fetal calf serum(FCS).The specimens were examined with light microscopy and transmission electron microscopy(TEM).Capsular bags without receiving PGMS only served as controls.RESULTS:PGMS inhibited the proliferation of RLEC in the manner of concentration and time dependentment.At the threshold protocol of incubation in PGMS at 0.8g/L for 5 or 10 minutes,proliferative activity of cells were largely arrested and nearly no RLEC was seen on the posterior capsule(P＜0.05).Control group had no effect on structure and proliferative activity of RLEC,and the growth proceeded rapidly so that the posterior capsule were totally covered by a confluent monolayer of cell by the end of 7 days.Under TEM,the cells in the control group were tightly arrayed with clearly defined cellular boundary and structure;while cellular deformity and undefined intracellular structure could be seen in the 0.4g/L and 0.8g/L experimental groups.CONCLUSION:PGMS can effectively inhibit the proliferation of RLEC.

Both total proteome and differential proteins were effectively extracted, separated and selected by a combined approach of both differential centrifugation and 2D-PAGE in liver of Paralichtys olivaceus( POL) under the stress of cadmium chloride as an artificial pollution source. Approximately 800 spots for extraction of whole protein separated with 2D-PAGE were obtained by direct lysis in the POL. In addition, approximately 11 differential proteins in POL were also obtained under the stress of cadmium chloride. The differential centrifugal were used to prepare three sedimentation and a plasmolysis proteins, called POL component Ⅰ, POL component Ⅱ, POL component Ⅲ, and POL component Ⅳ(plasmolysis protein), respectively. Total protein spots for each gel were calculated to have 380, 550, 500, and 850, respectively, approximately 2280 spots in sum, while total spots are much higher than those by direct lysis approach. Using the comparison method, approximately 54 differential proteins in POL were obtained by a combined technology of both differential and two dimensional polyacylaminde gel electrophoresis(2D-PAGE) methods under the stress of cadmium chloride. In addition, these differential proteins can be further identified by peptide mass fingerprint(PMF). Here, these combined techniques can be effectively used to extract, separate and identify the whole proteins and the differential proteins including protein markers in the biological tissue.

Child ; Congresses as Topic ; Humans ; Pediatrics ; Sleep

Objective To study the value of umbilical artery(UA)combined with fetal middle cerebral artery(MCA)for detecting fetal intrauterine hypoxia.Methods A total of 349 pregnant women undergoing childbirth in our hospital from February 2015 and February 2016 were divided into the observation group(fetal intrauterine hypoxia group)and control group(normal fetus group)according to the existence of fetal intrauterine hypoxia.Then the systolic peak velocity and end-diastolic velocity ratio(S/D),pulse index(PI),resistance index(RI),(S/D)MCA/(S/D)UA,PIMCA/PIUA,RIMCA/RIUA of UA and MCA were compared between the two groups.The sensitivity,specific degree and Youden index of each index for diagnosing fetal hypoxia were statistically analyzed.Results The S/D,PI and RI values of UA at 28-35+6 pregnant weeks and at 36-41 pregnant weeks in the observation group were higher than those in the control group(P＜0.05),while the S/D,PI,RI value of MCA and(S/D)MCA/(S/D)UA,PIMCA/PIUA and RIMCA/RIUA values were lower than those in the control group(P＜0.01).The resistance index corresponding ratios of MCA and UA for diagnosing fetal hypoxia had the highest Youden index.Conclusion The combined use of fetal UA and MCA resistance index ratios has higher clinical value for predicting fetus intrauterine hypoxia.

Objective To investigate the expression of COX-2 in multiple myeloma(MM)and the relationship between myeloma cells proliferation and apoptosis.To provide a new prognosis factor and therapeutic target.Methods COX-2 from the 22 newly diagnosed MM,14 relapsed MM and PCNA,HSP70 of the newly diagnosed patients were detected by immunohistochemistry method.Results All the newly diagnosed MM exhibited positive COX-2 immunoreactivity.50% had strong COX-2 and 50% showed weak COX-2.Relapsed MM exhibited strong COX-2.COX-2 was related with serum β2 microglobulin,marrow plasma cells,hemoglobin,PCNA,HSP70(P=0.019,0.003,0.048,0.006,0.034).Conclusion COX-2 was overexpressed in MM.Prognosis of patients with strong COX-2 is poorer than those with weak COX-2.COX-2 may promote the proliferation and inhibit the apoptosis of myeloma cells.