Objective:To investigate the effect and mechanism of donor-Ag specific T cell vaccination on inducing specific immune tolerance of allogenic liver transplantation and the mechanism of immune privilege of liver transplantation .Methods:CBA mice were recipients,B6 mice were donors,T cell vaccination (TCV) were made from the attenuated spleen cells of CBA mice ,which were stimulated by Con A and were challenged with the spleen cells of B 6 mice.There are 3 groups in this experiment:Transplant control group:Orthotopic liver transplantation ( OLT) were performed with the recipients of CBA mice and donors of B 6 mice;Flt3-L treating group:OLT were performed with the recipients of CBA mice and donors of B 6 mice treated with Flt3-L;TCV group:OLT were performed with the recipients of CBA mice inoculated with TCV and donors of B 6 mice treated with Flt3-L.Median survival time (MST) of liver grafts was recorded, IL-4, IL-10 and IFN-γin peripheral blood were tested after transplantation in each group .One-way mixed lymphocyte reaction ( MLR) were carried out with effectors of spleen cells from CBA mice and stimulator of spleen cells from B 6 mice at the 5th day after transplantation.The apoptosis of liver graft infiltrating cells (GICs) were analyzed by flow cytometric analysis at the 5th day after transplantation.Results: Flt3-L treating donor activated allogenic acute rejecting reaction , TCV vaccinating recipient before and after transplantation significantly depressed the acute immune rejecting reaction mediated by Flt 3-L.The liver grafts were accepted by recipient without the presence of Flt 3-L.The cytokines test show that the serum value of IL-4 and IL-10 were increased in Transplant control group and TCV group ,but decreased in Flt3-L treating group.The value of IFN-γwas increased in Flt3-L treating.

Objective To explore the effect of long-term depleted uranium (DU)ingestion on testosterone production in rats, and its involvement mechanism. Methods Male and female rats (F0 and F1 respectively) for 160 days, respectively. The contents of testosterone (T), luteinizing hormone (LH), and follicle stimulating hormone (FSH) in serum were detected in 20 months of F0 generations, and 15 months of F1 generations. RT-PCR was used to analyze the levels of StAR mRNA and P450scc mRNA. Results Compared with the normal control group, the testosterone contents in exposed F0 and F1 generations increased, the lowest was 51.73 U/L, but those of LH and FSH decreased. The expression of StAR mRNA in the low-doze group of F1 generation (StAR/β-actin = 1.35) was up-regulated, down-regulated for other groups.compared with the normal control group (P450scc/β-actin = 0. 313), the expression of P450scc mRNA in the low- and high-dose groups of F0 generation were decreased (P450scc/β-actin = 0.21), and those in the low- and high-dose groups of F1generation were increased (P450scc/β-actin = 0.623) (P ≤ 0.01). Conclusion Long-term DU exposure inhibit the male reproduction by intervening the sexual hormone production through down-regulated the expression of StAR mRNA and P450scc roRNA.

Objective:To systematically evaluate effects of auricular acupoint pressing on improving perimenopausal insomnia.Methods:The randomized controlled trials of auricular plaster therapy to improve perimenopausal insomnia was searched by computer in domestic and foreign databases, and the search time was from the establishment of each database to October 25, 2018. Two researchers independently screened the literature, extracted data and evaluated the risk of bias in the included literature and RevMan 5.3 analysis software was used for data analysis.Results:A total of 6 Chinese literatures were included. Meta-analysis results showed that there was no statistically significant difference in Pittsburgh Sleep Quality Index (PSQI) score reduction by auricular acupoint pressing compared with estazolam ( WMD=-0.06, 95% CI: -0.96-0.84, P=0.90) .Auricular acupoint pressing was better than Anshen Buxin capsule in reducing PSQI score ( WMD=-5.16, 95% CI: -7.37--2.95, P<0.000 01) . Auricular acupoint pressing could effectively improve perimenopausal insomnia, and the difference was statistically significant ( RR=1.19, 95% CI: 1.08-1.31, P=0.000 4) . Auricular acupoint pressing with beans combined with oral modified Huanglian Ejiao Decoction was better than oral modified Huanglian Ejiao Decoction alone in reducing Athens Insomnia Scale (AIS) scores ( WMD=-2.60, 95% CI: -4.42--0.78, P=0.005) . Compared with modified Chaihu Guizhi Longgu Muli Decoction treatment, auricular acupoint pressing combined with modified Chaihu Guizhi Longgu Muli Decoction could effectively reduce the modified Kupperman score ( WMD=-4.07, 95% CI: -6.36--1.78, P=0.000 5) . In terms of reducing the scores of the social support scale, there was no statistically significant difference between the auricular acupoint pressing with beans and estazolam ( WMD=-0.16, 95% CI: -1.26-0.94, P=0.78) . Conclusions:Auricular acupoint pressing has advantages in improving the total effective rate, reducing PSQI score and AIS score and improving Kupperman score. Limited by the quantity and quality of the included literatures, more large-sample high-quality studies with long-term follow-ups are needed for verification.

This paper reviews the literature about the common complications, evaluation tools and intervention measures of free flap repair for tongue cancer patients at home and abroad, summarizes the current research status, and points out that the nursing plan of free flap repair for tongue cancer patients needs to be further standardized, and needs to carry out evidence-based clinical research.

Objective To provide theoretical basis for researchers and institutions to conduct research in stroke according the multiple dimension analysis of stroke research paper cooperation nationally.Methods Using the scientometrics and social network analysis for data mining of 95883 stroke literature collected.Results The result show that quantity of paper publishing are increasing annually,the most common cooperation was co-authorship of 2～3 people,cooperation among institutions mainly focused in big cities like Beijing,Shanghai,Guangzhou at its core has taken shape,regional cooperation formed a scattering cooperation with Beijing as the center,research topics has shifted from cognition and treatment to prognosis,rehabilitation and related chronic disease gradually.Conclusions It is necessary to expand the scale of coopreation in stroke study,policies encouraging cooperation should be adopted,strengthen regional cooperation between west China and middle-east,establish a multi-stage stroke unit and strengthen stroke treatment from the multi-level and multi-angle,pay more attention to the occurrence and development of chronic diseases associated with stroke.And finally,contribute to the further development of stroke research.

Objective:To systematic review the efficacy and safety of external application of traditional Chinese medicine on treatment of breast cancer related lymphedema.Methods:CNKI, Wanfang Data, VIP, Sino-Med, The Cochrane Library, PubMed, Web of Science were searched for related randomized controlled trials, the retrieval time was from inception to May 25, 2020. Two researchers independently screened and evaluated the included studies. Meta-analysis was performed by RevMan 5.4 software.Results:A total of 16 studies involving 1 315 patients with breast cancer related lymphedema were included, and the methodological quality of the included studies was not high. Compared with conventional treatment, external application of traditional Chinese medicine combined with conventional treatment had advantages in improving the total efficiency( P<0.01) and quality of life( P<0.01), reducing pain( P<0.01) and improving upper limb function( P<0.01), without obvious adverse reactions( P>0.05), but there was no improvement in depression( P>0.05). Compared with conventional treatment, external application of traditional Chinese medicine could improve the total efficiency( P<0.01). Compared with placebo sticker combined with conventional treatment, external application of traditional Chinese medicine combined with conventional treatment can reduce circumference( P<0.05) and reduce pain( P<0.01), without obvious adverse reactions( P>0.05). Conclusions:Available evidence suggests that external application of traditional Chinese medicine may be a potential treatment method for breast cancer related lymphedema. Due to the poor methodological quality of the included studies, high-quality randomized controlled trials are still needed.

Objective:To explore the application effect of dynamic case scenario simulation combined with video playback in the teaching of trauma emergency for nursing interns.Methods:A total of 80 nursing interns who had internship in the Department of Emergency, The First Affiliated Hospital of Guangzhou Medical University from December 2017 to November 2018 were recruited in the study, and they were randomly divided into experimental group and control group (40 nurses per group). The dynamic case scenario simulation combined with video playback method was applied in the experimental group, and the traditional teaching method was used in the control group. Both groups had the same teaching hours (8 class hours) and trauma practice outline. Trauma theoretical knowledge and operational skills of the two groups were assessed, and the scores of nursing students in the two groups, teaching satisfaction and teaching evaluation in the experimental group were analyzed. SPSS 19.0 was used for t test. Results:The trauma theoretical knowledge assessment results and clinical operation skills assessment scores of control group were (73.40±7.11) points and (78.69±8.71) points, respectively, and those of experimental group were (78.09±6.84) points and (85.34±6.43) points respectively, with a statistical difference between the two groups ( P<0.05). The overall satisfaction of nursing students in the experimental group was higher than that in the control group [(98.34±2.19) vs. (94.94±2.58), P<0.01]. Most of nursing students (97.5%, 39/40) in the experimental group hoped to apply dynamic case scenario simulation combined with video playback method in the future. Conclusion:The dynamic case scenario simulation combined video playback method could enhance the trauma emergency ability of the nursing interns and improve the teaching satisfaction and teaching effect.

Objective To investigate the effects of nuclear respiratory factor 1(NRF1)on mitochondrial and cog-nitive dysfunction in Alzheimer's disease(AD)model mice.Methods The 5 × FAD mice were utilized as a mod-el for Alzheimer's disease,and the sparsely labeled AAV virus overexpressing NRF1(AAV-NRF1)was adminis-tered via stereotaxic injection into the brain.The expression of NRF1 in hippocampus was determined by Western blot,the morphology of mitochondria in hippocampus was observed by transmission electron microscope,the den-dritic spines of sparsely labeled neurons in the CA1 region were visualized and quantified using confocal laser mi-croscopy,cognitive and memory functions of mice were evaluated using the Morris water maze test,while electro-physiological methods were employed to detect long-term potentiation(LTP)of synaptic efficacy.Results The ex-pression of NRF1 in the hippocampus was significantly upregulated following stereotactic injection of AAV-NRF1(P＜0.001).This intervention led to notable improvements in mitochondrial morphology within hippocampal neurons,as well as enhanced cognitive and memory functions in mice(P＜0.01).Moreover,there was a significant in-crease in dendritic spine density among neurons located in the CA1 region of the hippocampus(P＜0.001),ac-companied by long-lasting and stable long-term potentiation(LTP)and a substantial elevation in fEPSP slope(P＜0.01).Conclusion The overexpression of NRF1 in a 5 × FAD mouse model of Alzheimer's disease(AD)initia-ted the restoration of mitochondrial dysfunction and enhanced synaptic plasticity,indicating that these alterations may contribute to the therapeutic efficacy of NRF1 overexpression in ameliorating cognitive dysfunction associated with AD.

Objective To analyze and set up the effective dose of different ionizing radiation for tunnel construction workers. Methods A total of five tunnels constructed using drilling and blasting methods were selected as the research subjects using the convenient sampling method. The workplace γ radiation effective dose, radon concentrations, and radioactive activity concentrations were detected, and on-site surveys were conducted to estimate the internal and external irradiation doses and total effective doses for workers in different work sites. Results Radiological hazards in tunnels constructed using drilling and blasting methods included radon and its progeny, γ radiation, radioactive dust (uranium-238, radium-226, thorium-232, and potassium-40) and others. The average total effective dose of ionizing radiation exposure for tunnel construction workers was (6.730 1±1.541 1) mSv. The average dose of radon and its progeny was (6.163 0±1.512 8) mSv, radioactive dust was (0.014 6±0.009 1) mSv, γ radiation was (0.552 6±0.138 7) mSv. The dose of radioactive dust of radon and its progeny was 0.24%. Radon and its progeny contributed more to the radioactive dose than radioactive dust and γ radiation (all P<0.05). Among all the radioactive dusts, the dose contribution ranked from highest to lowest was thorium-232, uranium-238, and radium-226. Conclusion For tunnel construction workers, the largest contribution to the effective dose of ionizing radiation exposure is from radon and its progeny for internal irradiation, followed by γ radiation for external irradiation. The contribution of radioactive dust to internal irradiation dose can be considered negligible.

Objective? To understand the research status of experiential teaching applied in nursing course teaching at home and abroad, and to explore the existing problems so as to provide information and direction for further researches and development. Methods? Literatures were retrieved in China national knowledge infrastructure (CNKI), WanFang database, VIP, SinoMed and PubMed from building database to June 2018. We extracted related literatures and analyzed them by bibliometric analysis. Results? A total of 228 literatures were included with 207 Chinese and 21 English papers. The number of papers published after 2010 was upward trend. The number of core journals (29) and SCIs (6) was less. Research methods focused on empirical research with 126 papers accounting for 55.26%. A total of 31 kinds of course applied this teaching method. The teaching effects were mainly evaluated with the questionnaire. Conclusions? The application of experiential teaching in nursing courses was paid more attention to. The teaching was applied in diverse courses, but the quality of literatures needed to be improved. In the future,researchers should lay emphasis on scientific rigorous design and diverse evaluation methods so as to improve the objectivity and reliability of teaching effects.