Objective To investigate the function of SD rats Schwann cells on the growth and differentiation of adipose-derived stem cells(ADSCs) when they are co-cultured in Transwell culture system. Methods The ADSCs harvested from SD rats were divided into 3 groups. Group A: ADSCs and Schwann cells were cultured in Transwell indirect co-culture system. Group B: ADSCs were induced by β-BME and BHA. Group C: a contrast group. The morphology of ADSCs was observed and immunohistology was pedormed. Results ADSCs of group A and group B were partly differentiated to the cells which had long neurite,and had a positive result in the NF staining, but negative in the GFAP staining. Group A shows no great difference in neurite length compared with group B(P < 0.05), and no great difference in cell quantity compared with group C (P < 0.05). Conclusion Schwann cells of SD rat have a growth supportive and neuronal differentiation inducing effect on ADSCs.

Objective To transduct with human telomerase reverse transcriptase(hTERT) to Schwann cells via electransfection technique to prolong the life span and enhance the proliferative capacity of Schwann cells.Methods The hTERT RNA was derived from esophagus cancer tissue and pcDNA3.1-hTERT vector was built.With electransfection technique, we tmnsfected vector into ADSCs.The PCR,TRAP-PCR, and PI-annexin V were tested to prove the expression of hTERT in ADSCs.Results After transduction the hTERT RNA in Schwann ceils, TRAP-PCR test, PI-annexin V dying and S100 dying was positive.Conclusion Telomerase catalytic subunit(hTERT) is transduct into Schwann cells, and it can to enhance the prolifertative capacity.

Objective To investigate the public's perception and attitudes on the development of nuclear power, assess their knowledge about nuclear power and radiation, and to build a database on the public's perception for the purpose of providing better public health service, associate technical support and give suggestions for decision-makers.Methods In total of 1 440 local residents who live within 30 kilometers of a proposed nuclear power were chosen for in-person interviews.Questionnaires comprised of 49 questions designed to assess the public's knowledge of radiation and nuclear power, their attitudes to the development of nuclear power, their evaluation of local government and their informational environment.ANOVA was used to compare the influence of different factors on cognitive level.Multivariate linear regression was used to analyze the main factors affecting the level of public awareness.Comparison among groups (respondents in this survey vs.other comparable surveys) was conducted using x2 test.Results Of the respondents, 29.7％ and 39.5％ of respondents knew about nuclear power and radiation, respectively, 24.2％ supported the construction of a nuclear power plant in their own area, which was lower than the average national support for construction of nuclear power plants (29.0％) (x2 =8.71 ,P ＜ 0.05).When queried about safety cncerns 36.8％ of respondents worried about the safety of nuclear power plant and 78.5％ of respondents were afraid of the damage to their health, while 34.1％ of respondents held the belief that the nuclear power plant could bring harmful effect even under normal operation.Regarding the informational environment, 90.0％ of the respondents could not or barely got access to knowledge on nuclear power plants, 71.1％ hoped to acquire the knowledge on nuclear power plants, 48.4％ hoped to acquire this knowledge by television programs, and 62.4％ mostly trusted information given by experts from universities or institutes.In comparison to other findings acquired in similar surveys on the Tianwan and Qinshan nuclear power plants before the Fukushima accident, the findings indicated that safety assessment of nuclear power plant were lower (x2 =20.49,56.96, P ＜ 0.05).Conclusions The public's knowledge level on nuclear power and radiation directly influenced their attitude on nuclear power.The related agencies should strengthen publicity and education in order to increase the public's knowledge on nuclear power and radiation.The communication platform between the related agencies and the public should be established.Active and continued risk communication should be carried out to increase public acceptance of nuclear power.

Abstract On 18 May 2021, the Center for Disease Control and Prevention (CDC) of X District in P City, Z Province received a co-investigation of a suspected case of intentional HIV transmission from the public security branch, and conducted epidemiological investigations on Zhao and Wang (both males). Wang was confirmed HIV-positive in 2019. Zhao had unprotected sexual encounters several times with Wang in March 2021 without being informed of Wang's HIV infection. Zhao developed fever, sore throat and other symptoms of acute infection phase on 28 March, and were confirmed HIV positive by the CDC of P City on 11 May. Zhao did not have sex with anyone else before or after having sex with Wang. In addition, Zhao had no history of surgery, blood transfusions, drug use or any other history of HIV exposure. Laboratory tests conducted by the CDC of Z Province showed that the HIV nucleic acid sequences between the samples of Zhao and Wang had a high degree of homology. Combined with the epidemiological investigation, laboratory testing and the evidence from the public security branch, it was concluded that Wang intentionally transmitted HIV to Zhao through unprotected anal sex without disclosing his HIV infection status.

In order to analyze the image noise effect on the results of Gamma knife dosimetry parameter test, we tested the dosimetry parameters of the Gamma knives according to GBZ 168-2005. Radiological protection standards of X (gamma)-ray stereotactic radiosurgery for head treatment. Dose analysis software was applied to examine the testing film before and after image denoising, and SPSS 11.0 software was used for statistical analysis. The results showed that there was a significant difference in the results of the maximum deviation between radiation field size and its nominal value (t = 7.600, P < 0.01) and the radiation field's penumbra region width of collimators also had significantly different sizes (t = 5.334, P < 0.01) before and after image denoising. This study indicated that the image noise could influence the results of testing Gamma knife dosimetry parameters, so as to cause deviations.
Algorithms ; Artifacts ; Gamma Rays ; Head ; surgery ; Humans ; Radiometry ; instrumentation ; Radiosurgery ; instrumentation ; Radiotherapy Planning, Computer-Assisted ; methods ; Stereotaxic Techniques

Objective To investigate radiation risk perception and nuclear acceptance after the 60Co stuck source incident in June 2009 in Qixian County,Henan Province.Methods From March to April 2010,23 hamlets and 2 schools from 5 towns in Qixian County were selected,while 3 hamlets and 2 schools from 3 towns were used as control in Huixian County,1 35 km away where no any impact of the incident was found.Face-to-face questionnaire survey was conducted among three groups including mass public,elite public(representatives of public opinion,such as physicians,teachers,govemmental officials,administrative personnel,private entrepreneurs),and middie school students(the third grade students in junior middle schools and the first grade students in senior middle schools).Results A total of 1 340 valid questionnaires were collected.The public knowledge levels about radiation and nuclear power were low among all groups in two areas and public knowledge levels in Qixian County were higher than those in Huixian County.In both areas.the knowledge levels of the students were higher tIIan those among the elite public,and that among the general public were the lowest.The knowledge levels of males and those with higher educational levels were higher than those of females and those with lower educational levels.More than 40.0% of the respondents supported the idea to build nuclear power plants in China.but only a small part of them supported to build nuclear power plants in their own areas.The percentages of opponents against local nuclear power plant construction were especially higher among the students and those with higher educational levels.More than 60% of the mass public and elite public believed the explanation of the government.More than 80% of the respondents held negative attitudes towards the performance of the Qixian County Government in dealing with this incident.The student gave the lowest evaluation of the credibility and the specific performance of the local government,whereas the elite public placed themselves between the students and the mass public.The reasons why the local people left their homes to evade risk included rumors(67.2%),lack of radiation knowledge(61.9%),group psychology(59.2%),and failure of the government to inform the truth to the public in time(42.3%).Conclusions The public still fails to know enough about radiation and nuclear power.Although they trust the government,they are dissatisfied with the performance of the local government in dealing with the incident.The negative evaluation of the students is worth concerning.

Objective To investigate the clinical efficacy and safety of re-radiotherapy combined with TS-1 (tegafur gimeracil oteracil potassium capsule) in treatment of local recurrent esophageal carcinoma.Methods A total of 63 esophageal carcinoma patients who recurred after the first course radiation treatment admitted to Jiangdu People's Hospital of Yangzhou during January 1,2012 to June 30,2015 were retrospectively analyzed.Twenty-seven of them treated with re-radiotherapy combined with TS-1 were deemed as the research group and 36 of them treated with radiotherapy alone were deemed as the control group based on different treatment.Then the clinical efficacy and adverse reactions of the two groups were compared.Results The objective response rates were 77.8％ (21/27) and 50.0％ (18/36) respectively in the research group and control group,and the difference was statistically significant (x2 =5.048,P =0.025).The median survival time in the two groups were 21.6 months and 13.7 months,the 1-year (74.1％) and 2-year (44.4％) survival rates of the research group were both higher than those of the control group (52.8％ and 30.6％,respectively),and the difference was statistically significant (x2 =6.086,P =0.013).The major adverse effects of the research group and control group during the treatment were radiation oesophagitis (92.6％ vs.80.5％),radiation pneumonia (18.5％ vs.19.4％),myelosuppression (96.3％ vs.77.8％) and gastrointestinal reactions (25.9％ vs.19.4％).Most of them were 1-2 grade,and there were no statistically significant differences (x2 =0.975,P =0.323;x2 =0.009,P =0.926;x2 =2.941,P =0.086;x2 =0.375,P =0.540).Conclusion The treatment of re-radiotherapy combined with TS-1 for local recurrent esophageal carcinoma can improve the efficacy and prolong survival period,and the adverse reactions are tolerable.

Objective:To evaluate the optimized effect of infiltration between the popliteal artery and the capsule of the knee (IPACK)-adductor canal block (ACB) combined with general anesthesia when used for the total knee arthroplasty.Methods:Sixty patients of both sexes, aged 18-64 yr, with body mass index of 18-24 kg/m 2, of American Society of Anesthesiologists physical status Ⅰ or Ⅱ, scheduled for elective unilateral total knee arthroplasty, were divided into 2 groups ( n=30 each) using a random number table method: IPACK-ACB combined with general anesthesia group (group IA) and conventional anesthesia femoral nerve block-popliteal superior sciatic nerve block combined with general anesthesia group (group C). Before induction of general anaesthesia, 0.375% ropivacaine 15 ml was injected for IPACK and 0.375% ropivacaine 25 ml for ACB under the ultrasound guidance in group IA, femoral nerve block and popliteal superior sciatic nerve block was performed under the guidance of ultrasound combined with a nerve stimulator and 0.375% ropivacaine 20 ml was injected in group C. After confirming the efficacy of nerve block, total intravenous anesthesia was carried out to maintain bispectral index values at 40-60.Patient-controlled intravenous analgesia was performed with sufentanil after operation, and the visual analog scale score was maintained ≤ 3.The quadriceps muscle strength score was recorded when discharge from postanesthesia care unit and at 24, 48 and 72 h after surgery.The first postoperative off-bed time and development of foot drop in awake patients after surgery, requirement for rescue analgesia and adverse reactions were recorded.The postoperative length of hospital stay and score for patients′ satisfaction with postoperative recovery were also recorded. Results:Compared with group C, the postoperative quadriceps muscle strength scores and score for patients′ satisfaction with postoperative recovery were significantly increased, the incidence of postoperative foot drop was decreased, and the length of hospital stay and first postoperative off-bed time were shortened in group IA ( P<0.05). Conclusion:IPACK-ACB combined with general anesthesia may be an optimized strategy which is helpful for outcomes after total knee arthroplasty.

Objective:To compare the clinical effective of clavicular hook plate with extra suture hole and traditional hook plate in the treatment of acute acromioclavicular dislocation.Methods:This study retrospectively analyzed the clinical data of traumatic acromioclavicular dislocation patients who were treated by operation from March 2017 to September 2020. The patients were included in traditional hook plate (THP) group and triangle stabilization technique hook plate (TSTHP) group according fracture fixations. TSTHP group adopted clavicular hook plate with extra suture hole. There were 27 patients in THP group with 18 male patients and 9 female patients; average age with 37.56±8.94 years old; 16 patients injured left side and 11 patients injured right side; crush injuries of 10 patients, traffic injuries of 9 patients and sports injuries of 8 patients; Rockwood classification of type III (9 patients), type IV (10 patients) and type V (8 patients). There were 20 patients in TSTHP group with 15 male patients and 5 female patients; average age with 38.95±9.91 years old; 13 patients injured left side and 7 patients injured right side; crush injuries of 9 patients, traffic injuries of 8 patients and sports injuries of 3 patients; Rockwood classification of type III (5 patients), type IV (9 patients) and type V (6 patients). The operation time, intraoperative bleeding, postoperative coracoclavicular space, visual analogue scale (VAS) and shoulder joint Constant-Murley score were compared between the two groups.Results:The operation time and blood loss of THP group and TSTHP group were 51.07±11.27 min, 87.41±15.34 ml and 55.65±8.59 min, 90.50±14.32 ml, respectively. The difference was not statistically significant ( t=1.52, 0.70, all P>0.05). Patients in both groups were followed up for 12 to 14 months after operations, with an average of 12.28 months. Six months after surgery, the coracoclavicular spaces of THP group and TSTHP group were 12.16±0.90 mm and 11.26±0.70 mm, respectively. The difference was statistically significant ( t=3.70, P<0.001). Postoperative VAS scores (2 days, 3 months, 6 months and 12 months) of TSTHP group [1.8±0.77, 0.00(0.00, 1.00), 0.00 (0.00, 0.00), 0.00(0.00, 0.00)] were significantly better than THP group [4.22±1.25, 2.00 (1.00, 3.00), 1.00 (0.00, 1.00), 0.00 (0.00, 1.00)]. The difference was statistically significant ( t=7.65, P<0.001; Z=4.85, P<0.001; Z=3.44, P=0.001; Z=2.96, P=0.003). Postoperative Constant-Murley scores (3 months, 6 months and 12 months) of TSTHP group (87.00±5.18, 91.25±2.75, 92.30±2.74) were significantly better than THP group (76.96±5.21, 83.22±3.86, 85.22±3.49). The difference was statistically significant ( t=6.54, 7.93, 7.51; P<0.001). The postoperative complication rates of THP group were higher than TSTHP group [70.4% (19/27) vs. 5.0% (1/20)]. Conclusion:In the treatment of acute acromioclavicular dislocation, the clavicular hook plate with extra suture hole can obtain satisfactory clinical effect compared with the THP, and clavicular hook plate with extra suture hole is more conducive to early recovery of shoulder function and reduce postoperative complications.

Objective:To investigate the associations between TNF-α and CCR5Δ32 gene polymorphisms and influenza A(H1N1)pdm09.Methods:Studies in PubMed, Cochrane Library, OVID, EBSCO, Web of Science published before February 7, 2019 were retrieved comprehensively. Observational studies related to TNF-alpha and CCR5 gene polymorphisms and influenza A(H1N1) pdm09 were collected. A strict quality evaluation was carried out according to NOS scale. Meta-analysis was performed using software Revman 5.0 and Stata 11.0.Results:After screening, a total of 8 studies were included in this Meta-analysis. The results showed that TNF-α gene polymorphism rs361525 might be associated with the risk of influenza A(H1N1)pdm09 virus infection (A vs. G: OR=2.25, 95 %CI: 1.09-4.65, P=0.03; AA vs. GG: OR=4.34, 95 %CI: 1.65-11.41, P=0.003; AA vs. AG+GG: OR=4.38, 95 %CI: 1.67-11.48, P=0.003), similar trend also found in rs1800750 (AA+AG vs. GG: OR=2.42, 95 %CI: 1.24-4.71, P=0.01). The results of subgroup analysis indicated that A allele and AA+AG genotypes of rs361525 were risk factors for influenza A(H1N1) pdm09 virus infection in Caucasians. AA genotype was a risk factor for influenza A(H1N1) pdm09 virus infection in Mexican ( P<0.05). There was no significant difference in the genetic polymorphism of CCR5 and the severity of influenza A (H1N1) pdm09 virus indection ( P>0.05). Conclusion:People with allele A or genotype AA at rs361525, genotype AA+AG at rs1800750 of TNF-α gene might be more susceptible to influenza A(H1N1) pdm09.