BACKGROUND:Maxil ary sinus floor elevation via a lateral window approach is the most effective method of overcoming the shortage of bone mass deficiency in atrophic maxil ary posterior region. Bone transplantation is considered to be a prerequisite for the success of maxil ary sinus floor elevation. Platelet-rich plasma and platelet-rich fibrin have been used to accelerate bone formation, regeneration, and repair. However, few in-depth studies are reported on the effects of concentrated growth factors on new bone formation. OBJECTIVE:To investigate the effects of concentrated growth factors applied in maxil ary sinus floor elevation via a lateral window approach with simultaneous implant placement on repair of bone defects and new bone formation. METHODS:This was a randomized double-blind control ed trial, which was performed at the Hospital of Stomatology, Southwest Medical University, China. Forty patients presenting with loss of maxil ary molars and residual bone height of 2-5 mm in the posterior maxil ary region were included in this study. These patients were randomly assigned to either receive concentrated growth factors, hydroxyapatite and autogenous bone (experimental group, n=20) or hydroxyapatite and autogenous bone (control group, n=20) at bone defect sites. X-ray examination was performed 1, 3 and 6 months after surgery to evaluate bone regeneration and repair as per excel ent and good rate. The thickness of the cortical bone at the defect sites was measured using a dental cone beam CT scanner to reflect bone density. The study protocol had been approved by Ethics Committee of Hospital of Stomatology, Southwest Medical University, China, was performed in strict accordance with the Declaration of Helsinki, and had been registered with ClinicalTrial.gov (identifier NCT03046173). Written informed consent had been obtained from each patient prior to enrol ment. RESULTS AND CONCLUSION:This study was completed in 2016. Study outcomes were obtained as fol ows:X-ray images showed that 3 and 6 months after surgery, bone regeneration around the implant was better in the experimental group than in the control group (P<0.01) and better bone regeneration in the experimental group was observed at 6 months than at 3 months after surgery. At 1, 3 and 6 months after surgery, bone density at bone defect site was significantly greater in the experimental group than in the control group (P<0.01). These results suggest that concentrated growth factors applied in maxil ary sinus floor elevation via a lateral window approach with simultaneous implant placement can promote new bone formation and accelerate synosteosis.

Animals ; Bile ; Carps ; Hemofiltration ; Humans ; Poisoning ; therapy

Objective To assess the osteogenic ability after co-culture BMSC and ADSC in vivo and in vitro.Methods ADSC and BMSC were obtained by adherent screening method and enzymatic digestion method.Flow cytometry was used to confirm the phenotypes of ADSC and BMSC.Oil red O was used to induce MSC to fat.Alkaline phosphatase (ALP) and alizarin red staining were used in osteogenic group.This sample was divided into four groups,no-induced stem cells group;BMSC osteogenic induction group;ADSC osteogenic induction group;co-culture of BMSC and ADSC osteogenic induction group.ALP activities and Calcium absorbance were determined during different periods of osteogenic introduction.OCN and Runx2 expression level were tested via RT-PCR and western blot methods after osteogenic induction for 2 weeks.Furthermore,cells in each group were seeded on HA/CS/PLLA composite scaffolds,and the scaffolds with cells were planted into bone defects in rat models.The rats were sacrificed by overdose anesthesia at 8 weeks after surgery and the scaffolds were removed for further analysis.Results Oil red O staining demonstrated red after adipogenic induction.Alkaline phosphatase and Alizarin red staining showed flaky red under condition of osteogenic induction.There had no statistical change among each group after osteogenic induction for 3 days,and ALP activity significantly increased after osteogenic induction for 5 days.Meanwhile,the ALP activity in co-culture of BMSC and ADSC group was markedly higher than the other three groups.However,there had no significant change in A value of calcium absorbance among each group after osteogenic induction for 7 days,while it increased at 14th day and ALP activity in co-culture of BMSC and ADSC group was significantly higher than the other three groups.After osteogenic induction for 2 weeks,the mRNA expression of OCN and Runx2 in co-culture of BMSC and ADSC group was 78.24±8.11 and 1 180.13±121.16 respectively,and the protein expression of OCN and Runx2 was 6.54±0.59 and 4.43±0.51.These mRNA and protein expression level in co-culture of BMSC and ADSC group enhanced significant compared with the other 3 groups.Histological assay demonstrated that the new bone tissues formed in co-culture of BMSC and ADSC group were 497.75±7.44 μm2,which was larger than that in the other 3 groups at 8 weeks after implantation.Conclusion Co-culture BMSC and ADSC may up-regulated the osteogenic ability in vivo and in vitro.

Objective Compared with different decellularization procedures for their potential of cell removal and the ability to preserve the matrix. Methods Specimens of bovine pericardiums were treated by 3 approaches (detergent and enzyme extraction、trypsin 、Triton-X 100 and sodium-deoxycholate). Tissue samples were then observed by HE staining and scanning electron microscopy to confirm the removal of cells. Von Gieson(VG) staining and Gomori staining were used for showing the integrity of collagen and elastin. DNA content was examined by the method of DNA extraction. Tissue shrinkage temperature and mechanical properties were also studied. Results Completely decellularization were achieved in 3 groups. While trypsin、Triton-X 100 and sodium-deoxycholate caused severe structural destruction and declined of mechanical properties of the matrix. In contrast, detergent and enzyme extraction achieved completely deeellularization and effectively preservation the matrix structure. Conclusion This research demonstrated detergent and enzyme extraction could achieve both complete decellularization and preservation of the matrix structure. This approach may provide an ideal platform for the construction of tissue-engineering heart valves.

ve To investigate the effects of selenium and zinc on the absorption, excretion and accumu-lation of fluoride in rats. Methods The contents of fluoride in serum, excrement, urine and bone were determined in Wistar rats drinking distilled water containing 100 mg/L NaF and orally perfused jointly with 0.1 mg/(kg? d) Na2SeO3 and/or 14.8 mg/(kg?d) ZnSO4 one time per two days continuously for 90 days. Results Na2SeO3 and/or ZnSO4 could increase the concentration of fluoride in urine, decrease the concentration of fluoride in serum and the content of fluoride in bone of rats. Exposure to ZnSO4 and joint exposure to Na2SeO3 and ZnSO4 could increase the content of fluoride in excrement. Conclusion ZnSO4 could inhibit the absorption of fluoride in intestine, Na2SeO3 and /or ZnSO4 could promote the excretion of urine fluoride and restrain the accumulation of fluoride in bone of rats.

Objective To study the signal transduction pathway for myocyte contraction induced by Substance K (SK) in rats. Methods The fluorescent Ca 2+ indicator Fluo 3AM was used to quantitate the calcium signal directly in the primary cultured myocardial cells. Changes of free Ca 2+ concentration in cardiac myocytes were detected by flow cytometry. The phospholipase C (PLC) inhibitor, neomycin and IP3 receptor antagonist, heparin, were used to block signal system of phosphates Ca 2+ in order to investigate whether they took part in the SK induced changes of [Ca 2+ ]i in myocytes. Results SK(1.78?10 -5 mol/L) elevated [Ca 2+ ]i in myocytes. The effects could be blocked by neomycin and heparin. Conclusion SK can elevate [Ca 2+ ]i in myocyte, which may be mediated by a signal system of phosphates Ca 2+ .

Objective To detect the level of serum α-klotho in different obese people and to investigate the correlation between serum α-klotho and obesity-related glomerulopathy (ORG).Methods A total of 48 cases of ORG diagnosed by renal biopsy were enrolled in the study.Fortyeight gender-,age-and BMI-matched obese participants,and 48 obese chronic kidney disease (CKD) patients without ORG were included as controls.The clinical manifestations,laboratory examinations of all three groups were collected,and the level of serum α-klotho protein was measured by ELISA.Results The patients with ORG were characterized by decreased serum α-klotho concentration compared with obese patients group and obese CKD patients group [572.66(439.92,690.58) pg/ml vs 635.85(559.52,769.20) pg/ml and 690.30(516.15,828.20) pg/ml,P＜ 0.01].Multinomial multiple logistic regression analysis revealed that serum α-klotho (per 100 pg/ml increased) was independently associated with the prevalence of ORG,and the risk of ORG decreased by 35％ in the obese participants (OR=0.652,95％ CI:0.487-0.872) and 38％ in CKD patients (OR=0.617,95％ CI:0.453-0.832) respectively.Conclusions The level of serum α-klotho is significantly decreased in ORG and associated with the prevalence of ORG independently.Serum α-klotho may be a protective factor for ORG.

Objective To develop questionnaires to indentify research motivation and its related psychological factors for medical postgraduates.Methods The questionnaire was developed based on previous literature and case interview by using self-determination theory as the theoretical framework.Delphi method and stratified factor analysis were used to examine the reliability and validity of the questionnaire.Results The questionnaires included 2 sections:research motivation questionnaire and related psychological factors questionnaire.The Cranach's α of each questionnaire was 0.89 and 0.90 and test-retest reliability coefficient was 0.74 and 0.80.The content validity (CVI) of each questionnaire was 0.958 and 0.935,and stratified factor analysis demonstrated that the items of each dimension could account for more than 40％ of the accumulated variance.Conclusion The questionnaires have good reliability and validity and could be applied.

Professor Luo Lingjie is a national famous old doctor of traditional Chinese medicine (TCM). He has a set of effective thoughts and methods on health maintenance. The core of the thought is Tiao-Xin, that is to say the emotion regulation is the key to health. The idea and method include three aspects, which include emotion regulation, diet regimen and exercise regimen. The emotion regulation is divided into clean ears, optimistic mood, learn to adapt, maintain psychological balance, and comply with nature. Diet regimen is fell into pay attention to the health food, regular diet, dietotherapy as primary and followed by drug, comply with the four seasons, reasonable to choose the food. There are four principles of exercise regimen, which are the choice of sports according to individual person with the aim to relax the body, move to raise the shape which should be combined with static to repose, proceed in an orderly way and persevere it step by step. The idea and method can also be used for daily personal health and clinical nursing for health maintenance. It is important that the physical and spiritual needs be consistent with long-term practice.

OBJECTIVE:To systematically review the efficacy of Ginseng polysaccharideinjection combined with radiotherapy or chemotherapy in the treatment of malignancies,and provide evidence-based reference for clinical treatment. METHODS:Re-trieved from CNKI,CBM,VIP,Wanfang Database PubMed,EMBase,Web of Science,randomized controlled trials (RCT) about Ginseng polysaccharideinjection combined with radiotherapy or chemotherapy(test group)versus radiotherapy or chemothera-py alone(control group) in the treatment of malignancies were collected. Meta-analysis was performed by using RevMan5.3 soft-ware after data extract and quality evaluation by Cochrane 5.1.0. RESULTS:Totally 7 RCTs were enrolled,involving 567 patients. Results of Meta-analysis showed,the effective rate [OR=1.99,95%CI(1.27,3.14),P=0.003] and improvement rate of life quality [OR=2.95,95%CI(1.75,4.97),P<0.001] in test group were significantly higher than control group,cell abnormal rate [OR=0.26,95%CI(0.16,0.41),P<0.001] was lower than control group,the differences were statistically significant. There were no obvi-ous adverse reaction in 2 groups. CONCLUSIONS:Ginseng polysaccharideinjection combined with radiotherapy or chemotherapy is effective in the treatment of malignancies.