Objective To evaluate the influence of different field-strength magnets(1.5 T and 3.0 T)on MRI artifacts caused by Ni-Cr alloy fixed prostheses.Methods The crown,bridge and upper denture fixed prostheses with different thickness were produced by Ni-Cr alloy as test samples,and were one by one put on the centre of water phantom for MR scanning with different field-strength magnets(1.5 T and 3.0 T).The artifact areas on these two field-strength magnets were measured and statistically compared.The plastic prostheses with the same shape and thickness as the test samples were served as controls.Results Ni-Cr alloy fixed prostheses could cause MRI artifacts,and the artifact areas increased with the mass of prostheses.However,no artifact area was found in controls.Compared with those on 1.5 T magnet,the MRI artifact areas significantly increased on 3.0 T magnet(P

BackgroundOur previous study determined that tetrandrine (Tet) has an inhibitory effect on the proliferation of human Tenon capsule fibroblasts ( TCFs ) in vitro,but its mechanism is poorly understood.ObjectiveThis study was to investigate the effect mechanism of Tet on human TCFs.MethodsHuman TCFs were isolated and cultured from scleral tissue of donor using explant technique.The cells were identified by vimentin antibody staining and morphology.The third generation of cells were seeded in the culture plate at the density of 1 × 105 cells/ml.Twenty-four hours after inoculation,the Tet of 1 × 10-5 mol/L was added in the well of culture plate,and the cells cultured only in 1640 medium served as the control group.The apoptosis of the cells was assessed by TUNEL,and the expressions of bax,bel-2,transforming growth factor-β2 (TGF-β2 ) in TCFs were detected using immunochemistry.Results The cultured cells showed the features of the fibroblasts in shape with the positive response for vimentin.A number of TUNEL positive cells were seen in Tet group and no TUNEL positive response was found in control group.The expression levels (A value) of bax,bcl-2 and TGF-~ protein in TCFs were 0.577 ± 0.009,0.430±0.012 and 0.341 ±0.017 in Tet group,and those in control group were 0.320±0.015,0.819±0.021 and 0.624±0.014 respectively,showing statistically significant differences between two groups( t =33.277,-35.356,-28.093,P＜0.01 ).Conclusions Tet suppresses the proliferation of human TCFs through up-regulating the expression of bax and down-regulating the expressions of bcl-2 and TGF-β2 in vitro.

OBJECTIVETo evaluate the effect of lateral supramalleolar artery descending branch antidromic flap for the repair of soft tissue defects in the foot and ankle.

METHODSFrom May 2009 to October 2013,12 patients with soft tissue defects combined with tendon and bone exposure in the foot and ankle were treated by lateral supramalleolar artery descending branch antidromic flap for the repair of soft tissue defects in the foot and ankle, including 9 males and 3 females with an average age of 37.5 years old ranging from 19 to 58 years. Ten cases had the soft tissue defects in the dorsum of foot and 2 in the ankle. The defect area of soft tissue was from 11 cm x 9 cm to 8 cm x 5 cm.

RESULTSTwelve patients were follow-up for 3 to 12 months (averaged 7.3 months). The flaps of 9 cases were survived,the flaps edges of the other 3 cases were necrosis,and healed after dressing change. The flaps were slightly swelling without ulcer occurrence.

CONCLUSIONLateral supramalleolar artery descending branch antidromic flap can repairing the damage by one-stage operation with advantage of dissection easy,rich blood supply without sacrifice of major artery.

Adult ; Ankle ; blood supply ; surgery ; Arteries ; surgery ; Female ; Foot ; blood supply ; surgery ; Foot Injuries ; surgery ; Humans ; Male ; Middle Aged ; Soft Tissue Injuries ; surgery ; Surgical Flaps ; Young Adult

· AIM: To explore the dynamic expression and correlation among telomerase catalytic subunit (TERT), proliferating cell nuclear antigen ( PCNA) and antiapoptosis protein Bd-2 which relate to cell proliferation in epiretinal membrane of rat traumatic proliferative vitreoretinopathy(PVR).· METHODS: S-P technique was applied for immunohistochemical staining of epiretinal membrane of traumatic PVR with TERT, PCNA and Bcl-2 antibody. HE staining was also carried out. The staining results were analyzed with image analysis system.· RESULTS: The positive rate and average A of PCNA protein were upregulated at first and then down-regulated, with the peak value in 14d Group, which was significantly different from those in 7d Group and 28d Group.The positive rate and average A of TERT and Bcl-2 were also upregulated at first and then down-regulated, with the peak value in 14d Group and 21d Group, which were significantly different from those in 7d Group. There was significant correlation among PCNA, Bcl-2 and TERT protein expression (P≤0.01).· CONCLUSTON: TERT and Bcl-2 take part in the regulation of proliferative cells in epiretinal membrane of traumatic proliferative PVR, with high correlation with the dynamic changes of cell proliferation.

Objective:To compare the efficacy and costs of pegylated recombinant human granulocyte colony stimulating factor (PEG-rhG-CSF) and granulocyte colony stimulating factor (G-CSF) for hematopoietic stem cell mobilization and hematopoietic recovery after transplantation in patients with relapsed or refractory malignant lymphoma. Methods:From July 2014 to October 2016, 15 patients with malignant lymphoma using peripheral blood stem cell mobilization (PBSCM) for autologous peripheral stem cell transplantation (APBSCT) were treated in our institution and enrolled in the PEG-rhG-CSF group (experimental group). We analyzed data from other 15 patients with malignant lymphoma mobilized with G-CSF who were treated in our institution from January 2013 to August 2015 (control group). Results:Patients in both groups were successfully mobilized. The median amounts of CD34+cells collected in the experimental and control groups were 16.2×106/kg and 8.9×106/kg, respectively (P=0.414), and the median amount of mononuclear cell (MNC) was 12.4×108/kg and 9.9× 108/kg, respectively (P=0.519). In the experimental and control groups, the mean durations of mobilization were 10.66±1.45 and 9.33±1.83 days (P=0.234), the mean durations of neutropenia during mobilization were 4.20±2.17 and 3.80±2.04 days (P=0.608), the mean durations of absolute neutrophil count recovery after APBSCT were 10.14±1.29 and 10.93±2.69 days (P=0.327), and the mean durations of platelet recovery were 10.36±2.27 and 12.27±3.38 days (P=0.121). Mobilization and hematopoietic recovery after APBSCT were not significantly different between the two groups. The cost was lower in the experimental group than that in the control group (RMB 3,960 yuan versus RMB 11,479.3±2,401.3 yuan). Conclusion:High-dose chemotherapy combined with PEG-rhG-CSF is a promising, effective, and low-cost mobilization regimen for patients with relapsed or refractory malignant lymphoma.

Açaí (Euterpe oleracea) emerged as a source of herb has a long history in South America, which was approved by the Ministry of Health used in China and it has been introduced planting in Guangdong and Taiwan. This article summarized applied history of Açaí and its present status in China. Did theoretical study on the Chinese herbal properties of Açaí based on the Chinese traditional philosophical culture to analysis the function and symptom preliminary, combining with used for medical recordation, chemical component, biological activity. It is aiming at establishing the theoretical foundation for the application under the guidance of TCM theory.
Euterpe ; chemistry ; Medicine, Chinese Traditional ; Models, Theoretical ; Phytotherapy ; Plant Extracts ; pharmacology ; South America

Objective To explore the relationship between social participation and needs for rehabilitation of the disabled in Guangdong Province and to make a proposal for developing the rehabilitation strategies. Meth-ods The data of the Second National Sample Survey of Disabled Persons in Guangdong Province was used in this study. Ranked data analysis was made with the sub-items of the social participation assessment and the main needs of the disabled individuals. Results Significantly statistical differences were revealed with regard to the constitu-ent ratio of needs for rehabilitation services among people with different degrees of difficulties in social participation caused by hearing and visual impairments as well as physical and mental disabilities. No significant difference was found in terms of the constituent ratio of rehabilitation needs among those with difficulties in speech and those with psychiatric diseases. The major rehabilitation needs focused on medical service, assistive apparatus support and functional trainings. Conclusions The rehabilitation needs were different among different categories of disabled persons. Rehabilitation services should be provided accordingly.

Abstract: Objective To analyze the effect of nutrition package on the nutritional status and prevalence of children in rural areas of Hainan Province, and provide scientific basis and suggestions for further improving the nutritional and health status of children in this region. Methods　Four cities and counties were randomly selected as the intervention group, and four cities and counties matched with the intervention group in terms of population, economy, social culture, maternal and child health work foundation of township health centers, physical nutrition and health status were selected as the control group.With the combination of monitoring and prospective cohort study, infants in the intervention group and the control group were studied from June 1, 2020, and they were intervened for 12 months with supplementary food nutrition package. Before and after intervention, the nutrition and health status of infants aged 6-24 months in the intervention group and the control group were investigated to evaluate the nutritional and health effects of supplementary food nutrition package for infants aged 6-24 months in rural Hainan Province. Results　A total of 999 infants were investigated, including 427 in the intervention group and 572 in the control group. After 12 months of nutritional intervention, there was no significant difference in weight-for-age Z-score (WAZ) and height-for-age Z-score (HAZ) and weight-for-height Z-score (WHZ) between the intervention group and the control group (P>0.05). The rate of emaciation of the intervention group was 1.64%, which was significantly lower than 3.67% of the control group (P<0.05). There were no significant differences in the rate of growth retardation (2.81% and 3.32%, respectively) and underweight (0.47% and 1.92%, respectively) between the intervention group and the control group (P>0.05). The rate of respiratory infection and diarrhea in the intervention group were 9.13% and 1.17%, which were significantly lower than corresponding 23.25% and 3.15% in the control group (P<0.05). The hemoglobin of the intervention group and the control group were 117.24 g/L and 114.51 g/L respectively, and the rates of anemia were 11.11% and 22.84% respectively, the differences were statistically significant (P<0.05). Conclusions　The intervention of nutrition package in rural areas of Hainan Province has achieved the expected results, and supplementary food nutrition package has reduced the incidence of malnutrition and respiratory infection and diarrhea in recent two weeks in infants and anemia to a certain extent. We should attach great importance to the supplementary nutrition package for right-age children and promote the growth and health of children in rural areas through supplementary nutrition package, and continuously improve the nutrition and health level of children in Hainan Province.

OBJECTIVETo evaluate the effect of silk fibroin film for repairing urethral defect in rabbits.

METHODSTwenty-four male New Zealand rabbits were randomized into experimental group, control group I and control group II. In the experimental group, a urethral defect of 1.5 cm was induced in the 12 rabbits and repaired with silk fibroin film. The 6 rabbits in control group I without the surgically induced defect served as the sham operation group, and in control group II consisting of 6 rabbits the urethral defect of 1.5 cm was induced without repair. Histological observation and immunohistochemistry were conducted to examine the regenerative segments of the urethra at regular time points between 2 and 16 weeks postoperatively.

RESULTSThe 12 rabbits in the experimental group did not show signs of urethral stricture following the surgery. The implanted silk fibroin film for defect repair was degraded completely at 16 weeks and the defect was repaired with smooth urethral mucous membrane lining and orderly arranged smooth muscle cells. Immunohistochemistry identified the cells lining the defect area as the urethral epithelial cells.

CONCLUSIONSilk fibroin film can promote the repair of urethral defect by inducing the growth of the urethral epithelial cells and smooth muscle cells.

Animals ; Biocompatible Materials ; chemistry ; Fibroins ; chemistry ; Guided Tissue Regeneration ; methods ; Immunohistochemistry ; Male ; Membranes, Artificial ; Rabbits ; Random Allocation ; Regeneration ; Silk ; chemistry ; Tissue Engineering ; Urethra ; injuries ; physiopathology ; surgery ; Wound Healing