backbone. The existing form of Ca and P in the skeletons of Sailong and tiger was mainly Ca 10(PO 4) 6(OH) 2. Conclusion The mineral element contents in the skeletons of Sailong and tiger bone have the comparability. It shows that the contents of essential trace elements in Sailong bone are prior to those in tiger bone, significantly.

typeⅢgold alloy. Candida albicans could be found on acrylic resin ,but there was little on the other 4 dental metals. Conclusion: From the perspective of reserving periodontal tissue, pure-Ti and typeⅢgold alloy seem to be the first choice, Co-Cr alloy and Ni-Cr alloy are the second.

Objective To explore the infection status of high risk human papilloma virus (hrHPV) and its effects and clinical significance on expression of cysteinyl aspartate specific protease 1 (Caspase-1) and interleukin 1 β(IL-1β)in tissues of human cervical carcinoma. Methods A total of 102 patients with cervical carcinoma (cervical carcinoma group), 60 patients with cervical intraepithelial neoplasia (CIN group) and 30 patients with normal cervix (control group) were used as the research objects. PCR reverse dot hybridization method combined with DNA chip technique were used to detect hrHPV. The expressions of Caspase-1 and IL-1β were detected by immunohistochemical technique. Data were analyzed between hrHPV positive group and hrHPV negative group, between single type of hrHPV infection group and multiple type of hrHPV infection group. The relationship between caspase-1 and IL-1βexpression and clinicopathological parameters in cervical carcinoma patients were observed. Results HrHPV infection was detected in 75 cases(73.5%)in cervical carcinoma group and 11 types of hrHPV were detected. In these 11 cases, single type and multiple type of hrHPV infection were 61 cases(81.3%)and 14 cases(18.7%) separately. HrHPV infection rate was much higher in cervical carcinoma group than those in CIN group and control group(36.7%and 6.7%). Caspase-1 and IL-1βpositive rates were significantly higher in cervical carcinoma group(61.8%and 51.0%)than those in control group(26.7%and 23.3%). The positive rate of Caspase-1 was significantly higher in cervical carcinoma group than that in CIN group(40.0%, all P<0.01). The positive rates of Caspase-1 and IL-1β(77.8%and 74.1%)were higher in hrHPV DNA negative group than those in hrHPV DNA positive group(56.0%and 42.7%). There were no statistical differences in positive rates of Caspase-1 and IL-1βbetween single type of hrHPV infection group and multiple type of hrHPV infection group(P>0.05). The difference of positive expressions of Caspase-1 and IL-1βwere significantly related with cell differentiation, tumor size, lymphatic metastasis and clinical stage(P<0.05 or P<0.01). Conclusion There are single and multiple types of hrHPV infection in cervical carcinoma and the infection rate is high. HrHPVs may promote the progression of cervical carcinoma by restraining the expressions of Caspase-1 and IL-1β.

Objective:To investigate the characteristics of lymphocyte subsets in peripheral blood of patients with immunoglobulin G4-related disease (IgG4-RD) and the correlation between T helper 17 cell (Th17)/regulatory T cells (Treg) cell imbalance and cytokines.Methods:A total of 31 patients with IgG4-RD who were admitted to the Rheumatology and Immunology Department of the Second Hospital of Shanxi Medical University from January 2016 to June 2020 were included. We collected their clinical and laboratory data, and selected 30 age and sex matched healthy people as the control group. Flow cytometry was used to detect the percentage and absolute number of lymphocyte subsets [T, B, natural killer cell (NK), CD4 +T, CD8 +T] and CD4 +T subsets [Th1, Th2, Th17, CD4 +CD25 +forkhead box protein 3 (Foxp3) +Treg] in peripheral blood of IgG4-RD patients and healthy controls. The serum interleukin (IL)-2, IL-4, IL-6, IL-10, IL-17, tumor necrosis factor (TNF)-α and interferon (IFN)-γ levels in the IgG4-RD patients were measured by cytometric bead array (CBA). Correlation between Th17/Treg ratio and disease-related indicators was also analyzed. We used χ2 test, Mann-Whitney U test and Spearman correlation analysis for statistical analysis. Results:① The percentage of CD4 +T cells in the peripheral blood of IgG4-RD patients was higher than that of healthy controls [45.00%(33.97%, 51.48%) vs 39.36%(33.78%, 43.30%), Z=-2.142, P<0.05]. ② The percentage and absolute number of Th17 cells was increased in IgG4-RD patients [1.13%(0.70%, 1.55%) vs 0.77%(0.43%, 1.07%), Z=-2.229, P<0.05; 7.90(5.20, 12.23) cells/μl vs 5.60(3.12, 8.47) cells/μl, Z=-2.568, P<0.05], while the percentage of Treg cells was decreased [3.37%(2.82%, 5.65%) vs 4.96%(4.18%, 6.34%), Z=-2.986, P<0.01]. But the number of Treg cells showed no difference between the two groups. ③ Th17/Treg ratio was significantly increased in IgG4-RD patients [0.29(0.16, 0.46) vs 0.15(0.08, 0.23), Z=-3.119, P<0.01], and it was positively correlated with IgG4-RD response index score ( r=0.491, P<0.01). ④ Serum IL-6 [13.72(9.29, 26.06) pg/ml vs 2.23(1.94, 3.10) pg/ml, Z=-4.815, P<0.01], IL-10 [5.46(4.28, 15.38) pg/ml vs 1.81(1.59, 2.02) pg/ml, Z=-5.298, P<0.01], TNF-α [4.25(1.47, 7.26) pg/ml vs 1.15(1.05, 1.45) pg/ml, Z=-3.146, P<0.01] and IFN-γ [3.89(1.76, 6.61) pg/ml vs 1.41(1.24, 1.65) pg/ml, Z=-3.172, P<0.01] in IgG4-RD group were significantly higher than those in healthy control group. Moreover, Th17/Treg ratio was negatively correlated with IL-2 level ( r=-0.554, P<0.05). Conclusion:Th17/Treg disorder exists in IgG4-RD patients, and it is related to disease activity, indicating that Th17/Treg imbalance may be an important mechanism in IgG4-RD. IL-2 plays an important role in regulating Th17/Treg balance and may be a potential immunotherapy target in future.

Objective To study the risk factors of intracranial hemorrhage after endovascular therapy of cere-bral arteriovenous malformations embolization.Methods the clinical records and images of 230 patients with cAVMs were retrospectively reviewed.Patients with intracranial hemorrhage after endovascular therapy in 3 days were recorded and the risk factors of hemorrthage by using multivariate logistic regression for guiding the treatment strategy were studied.Results There were 15 patients occurred intracerebral hemorrhages.After treatment the area of cAVMs was significantly smaller than that before treatment[(2.18 ±0.91)cm vs (6.67 ±1.56)cm],the difference lvas a statis-tically significant (t =9.627,P <0.05).A partial AVM reduction of ≥36.5%(P =0.031)and hypertension(P =0.025)were considered as risk factors for hemorrhage after endovascular therapy of cAVWs.Conclusion Patients receives a partial AVMreduction of ≥36.5% or with hypertension history have a tendancy of increasing hemorrhage after endovascular therapy of cAVMs.It's helpful for preventing intracerebral hemorrhage if the arterial blood pressure maintains after endovascular therapy.

Objective: To explore the association of physical activity and screen time with health-related quality of life among students in China. Methods: A total of 4 388 students (graders 4-12) were randomly selected from primary, junior and senior high schools in Nanjing, China, to take part in this cross-sectional questionnaire survey in 2018. The associations of physical activity and screen time with health-related quality of life were assessed using mixed-effects linear regression models and reported as mean difference (MD) and 95% confidence interval(CI). Results: After adjustment for potential confounders and class-level clustering effects, students with sufficient physical activity reported an increased 0.03 (95%CI=0.01-0.05) unit of the Child Health Utility 9D (CHU9D) scores compared to their counterparts with insufficient physical activity, while participants with short screen time also recorded higher CHU9D scores 0.05(95%CI=0.02-0.08) than those with prolonged screen time. Relative to those with insufficient physical activity and prolonged screen time, students with insufficient physical activity and short screen time 0.05(95%CI=0.02-0.09), or students with sufficient physical activity and prolonged screen time 0.03(95%CI=-0.03-0.10), or students with sufficient physical activity and short screen time 0.08(95%CI=0.05-0.12), respectively, reported increased CHU9D scores. Conclusion Health-related quality of life was positively associated with physical activity, but negatively with screen time. Moreover, these two factors may have a combined effect on health-related quality of life.

Objective:To systematically evaluate the effect of physical exercises on the treatment of constipation by Meta-analysis.Methods:Randomized controlled trials of the effects of physical exercises on constipation were retrieved in databases of CNKI, WanFangData, VIP, SinoMed, PubMed, Web of Science and Cochrane Library from inception to December 2020. According to the inclusion and exclusion criteria, two reviewers independently selected literature, extracted data. The quality of included literature was evaluated by referring to the Cochrane collaboration's tool. And then the funnel plot was used to evaluate the risk of bias of included literature. Revman 5.3 software was used to conduct meta-analysis.Results:A total of 12 clinical trials include 1 004 patients were involved based on the inclusion and exclusion criteria. The physical exercise group was subjected to physical exercise or added other conventional treatment, and the control group had no regular exercise or only conventional treatment during the test. The fixed effects model was employed. The total effect of the value of the merger was calculated, the combined OR(95% CI) was 4.75(3.47, 6.51). Compared with the control group, exercise significantly relieved the patient's constipation symptoms( Z=9.69, P<0.000 01). Funnel figure shows a basic symmetry, which indicated the publication bias is small. Conclusions:Physical exercise is beneficial to constipation should be encouraged.

Objective: To examine the relative factors of transmural intestinal necrosis(TIN) during multidisciplinary stepwise management facilitating the decision making in patients with acute superior mesenteric vein thrombosis (ASMVT). Methods: Clinical data of patients with ASMVT admitted to Department of General Surgery, Jinling Hospital from January 2009 to June 2017 were reviewed retrospectively. There were 52 males and 37 females, aging (45.9±12.6) years (range: 20 to 69 years). According to the postoperative pathological results and follow-up, the patients were divided into TIN group (n=31) and non-TIN group(n=58, including 18 cases of intestinal stricture). The related factors were compared between ASMVT patients with TIN and patients without TIN by univariate analysis using t test, U test and χ² test accordingly, and factors with statistically significance were subsequently submitted to binary Logistic regression analysis. The predictive value and cut-off point of factors were evaluated by receiver operator characteristic(ROC) curve and area under the curve. Results: In univariate analysis, smoking, hypertension, peritonitis, white blood cell count,haemoglobin, international normalized ratio, blood albumin, thrombosis of superior mesenteric branches vein, free intraperitoneal fluid, decrease of bowel wall enhancement and pneumatosis intestinalis were TIN risk factors (all P<0.05). According to the binary Logistic regression analysis, white blood cell count (OR=1.093, 95%CI: 1.010 to 1.182, P=0.027), thrombosis of the superior mesenteric branches vein (OR=11.519, 95%CI: 1.906 to 69.615, P=0.008), pneumatosis intestinalis (OR=11.140, 95%CI: 2.360 to 52.585, P=0.002) were independent relative factors of TIN in patients with AMI, and the area under the ROC curve of the above factors and predictive model was 0.759 (95%CI: 0.647 to 0.871), 0.745 (95%CI: 0.641 to 0.848), 0.737 (95%CI: 0.621 to 0.854), 0.909 (95%CI: 0.847 to 0.971), respectively. The cutoff value of white blood cell count was 18.1×10⁹/L. Conclusion White blood cell levels, superior mesenteric vein branch thrombosis and pneumatosis intestinalis are independent predictors of TIN in ASMVT.

Objective To investigate the influential factors of surgical treatment for ischemic enteropathy secondary to portal venous system thrombosis (PVST).Methods Clinical data of 27 patients with ischemic enteropathy secondary to PVST admitted in our department from January 2009 to Jun 2016 were analyzed retrospectively.These patients were divided into two groups according to different surgical procedures:ischemic bowel resection with primary anastomosis or ostomy.Results There were significant differences between the groups in albumin and prealbumin level (t =3.585,4.194,P ＜0.05).There were also significant differences for BMI and body fat (t =2.325,2.430,P ＜ 0.05).The average time from the onset PVST to ischemic enteropathy was 20 d.Conclusion There should be awareness of ischemic enteropathy.Intestinal resection and anticoagulation therapy is necessary.The choice of surgical procedures depends on the preoperative nutrition level (albumin,prealbumin).

ObjectiveTo investigate the effect of linalool against acute liver injury induced by aflatoxin B₁（AFB₁） in rats and explore its protective mechanism. MethodTwenty male SPF SD rats were randomly divided into three groups： Control （n=6）， AFB₁ （n=7）， and linalool （n=7） groups. Linalool solution （200 mg·kg^-1） was administered preventatively for 14 days， while the control and AFB₁ groups intragastrically received an equivalent volume of double distilled water. After preventative administration of linalool， AFB₁ solution （1 mg·kg^-1， dissolved in saline） was intraperitoneally injected for two consecutive days to induce acute liver injury in rats. Samples were collected and processed 14 days after model establishment. Pathological changes in liver tissue of rats were observed using Hematoxylin-eosin（HE） staining and Masson staining. Biochemical detection was performed to measure the levels of alanine transaminase（ALT）， aspartate transaminase（AST）， γ-glutamyl transferase（GGT）， lactate dehydrogenase（LDH）， alkaline phosphatase（ALP）， total bilirubin（TBil）， direct bilirubin（DBil）， indirect bilirubin（IBil）， malondialdehyde（MDA）， superoxidedismutase（SOD）， catalase（CAT） ， glutathione（GSH）， Fe³⁺， and Fe²⁺ in the liver tissue. Western blot was adopted to assess protein expression levels of nuclear factor-erythroid 2-related factor 2（Nrf2） and heme oxygenase-1（HO-1）. Molecular docking was performed to verify the binding between linalool and key proteins of the Nrf2/HO-1 signaling pathway. Molecular dynamics techniques were used to confirm the stability and affinity of linalool binding with key proteins of the Nrf2/HO-1 signaling pathway. ResultPathological results showed that compared to that in the AFB₁ group， the liver structure in the linalool group tended to be normal， with a significant decrease in blue collagen fibers. The linalool group exhibited significantly reduced levels of ALT， AST， GGT， LDH， ALP， TBil， DBil， and IBil （P<0.01）， Fe³⁺ and Fe²⁺ content， and oxidative stress marker MDA （P<0.01）. The levels of antioxidants SOD， CAT， and GSH significantly increased （P<0.01）. Molecular docking showed a molecular docking energy between linalool and Nrf2 and HO-1 targets of -5.495 6 and -5.199 4 kcal·mol^-1（1 cal≈4.186 J）， respectively. Molecular dynamics results indicated strong affinity in the binding of linalool with Nrf2 and HO-1. Western blot revealed a significant increase in Nrf2 protein expression （P<0.05） and a decrease in HO-1 protein expression （P<0.01） in the linalool group. ConclusionLinalool may protect against AFB₁-induced acute liver injury by modulating the Nrf2/HO-1 ferroptosis signaling pathway to inhibit liver cell ferroptosis and regulate hepatic oxidative stress levels.