Objective To analyze the clinicopathologic data and operative parameters of 209 elderly co-lon cancer patients treated by radical resection between January 2002 and December 2011 ,and to investigate the factors related to recurrence and metastasis after colon cancer radical resection in elderly patients .Methods We used univariate and multivariate analysis of Cox regression ,including 14 variables:age,gender,disease duration, hospitalization duration,surgeon experience,operation duration,laparoscopicsurgery,tumor location,tumor size, gross morphology ,differentiate degree ,depth of bowel wall invasion ,lymph node involvement and obstruction .The survival curve was obtained by Kaplan -Meier method.Results Univariate analysis showed that tumor size (RR=2.658,P<0.0001),gross morphology(Infiltrating type,RR=3.407,P=0.0054),degree of differentiation (RR=0.32,P<0.0001) were associated with tumor relapse and metastasis .Multivariate analysis showed that gender(RR=0.585,P=0.0359),tumor size(RR=2.364,P<0.0001),degree of differentiation (Infiltrating type,RR=0.246,P=0.0437),gross morphology(RR=0.31,P<0.0001)were the significant factors.Conclu-sion Gender,tumor size,degree of differentiation,gross morphology were the independent factors of recurrence and metastasis of colon cancer after radical resection in elderly patients .Targeted follow -up for high -risk groups will improve patients′life quality and prolong their survival time .

Aim To explore the effects of chrysin on endothelial dysfunction induced by acute high glucose.Methods ① The effects of chrysin on normal isolated aortic at contraction induced by PE and on endothelial dysfunction induced by high glucose were tested in the following medium: normal group,chrysin group;normal-glucose group: glucose 11mmol·L-1 in Krebs' solution;high-glucose group: glucose 44 mmol·L-1 in Krebs' solution;mannitol group: mannitol 33 mmol·L-1 in Krebs' solution and chrysin group: 44 mmol·L-1 Glu+chrysin 1.0 μmol·L-1 in Krebs' solution.② The effects of chrysin on HUVEC cell viability after incubated in high glucose were observed in the following groups: normal-glucose group: glucose 5.5 mmol·L-1 in culture solution;high-glucose group: glucose 33.3 mmol·L-1 in culture solution;mannitol group: mannitol 27.8 mmol·L-1 in culture solution and chrysin group: chrysin(25,50 μmol·L-1)in culture solution.And the NO release was also testd in these groups.Results ① Chrysin could induce vaso-dilation in a dose-dependent manner at normal glucose.The Emax was(58.94±9.61)％,and the EC50 value was 51.9 μmol·L-1.After incubating the aortic rings with high glucose(44 mmol·L-1)for 4 h,there were significant differences in ACh-induced vascular relaxation between the normal glucose group and the high glucose group.The Emax was(32.12±3.92)％and the EC50 value was 78.0 μmol·L-1 of high glucose group(P<0.01).The endothelium-independent relaxation induced by SNP was not significantly different between the two groups.And chrysin(1.0 μmol·L-1)could reverse the decline of ACh-induced vasorelaxation response induced by high glucose(44 mmol·L-1).The Emax was(70.7±3.87)％and the EC50 value was 0.852 μmol·L-1.② The cell viability of HUVEC was depressed after incubated in high glucose,and chrysin could reverse the decline in a concentration-dependent way.And chrysin in defferent concentrations could increase the cell NO release.Conclusion Chrysin could prevent the acute high glucose-induced vascular endothelial dysfunction and could increase the NO release.

Objective:To investigate the effect of huaier granule combined with docetaxel + epirubicin + cyclophosphamide (TEC) neoadjuvant chemotherapy on the disease control rate and the levels of extracellular fragment of human epidermal growth factor receptor 2 (HER2-ECD) and tumor abnormal protein (TAP) in patients with advanced breast cancer.Methods:From April 2013 to June 2016, 94 patients with advanced breast cancer in Shengjing Hospital Affiliated to China Medical University were selected and randomly divided into observation group ( n=47) and control group ( n=47). The control group was treated with TEC neoadjuvant chemotherapy, and the observation group was treated with TEC neoadjuvant chemotherapy combined with huaier granules for 12 weeks. The curative effect, incidence of adverse reactions, cellular immune function indexes (CD8 + , CD4 + , CD4 + /CD8 + ), serum HER2-ECD and TAP levels were compared before and 12 weeks after treatment. The patients were followed up for 3 years after treatment, and the 1-year, 2-year and 3-year survival rates were compared between the two groups. Results:After 12 weeks of treatment, the disease control rate of the observation group was higher than that of the control group, with statistically significant difference ( P<0.05); during the treatment, the incidence of gastrointestinal reaction, neutropenia, thrombocytopenia and abnormal liver function of the observation group was lower than that of the control group, with statistically significant difference ( P<0.05); after 12 weeks of treatment, the serum CD8 + level of the observation group was lower than that of the control group, and the serum CD4 + , CD4 + /CD8 + level was higher than that of the control group, with statistically significant difference ( P<0.05); after 12 weeks of treatment, the serum levels of HER2-ECD and TAP in the observation group were lower than those in the control group, with statistically significant difference ( P<0.05); the 3-year survival rate in the observation group was higher than that in the control group, with statistically significant difference ( P<0.05). Conclusions:Huaier granules combined with TEC neoadjuvant chemotherapy in patients with advanced breast cancer can reduce serum HER2-ECD, TAP levels, which can enhance the immune function of the body, reduce the toxic and side effects, improve the long-term survival rate, and have a significant effect.

Objective To explore the value of CT spinal angiography with 256 MSCT and fast dynamic contrast-enhanced 3D MR angiography (CE-MRA) at 3.0 T in the diagnosis of spinal vascular malformations by comparing with results of DSA and operation.MethodsSeventeen patients suspected of spinal vascular diseases by initial MR and clinical manifestations all underwent CT spinal angiography.Of them,10 patients underwent MRA,15 patients underwent DSA within 3-5 days,and 8 patients finally underwent surgical treatment.ResultsCTA examination clearly showed the abnormal vascular lesions in 16 of 17 cases,including 7 cases with the diagnosis of spinal dural arteriovenous fistula,7 cases of perimedullary arteriovenous fistula,and 2 cases of spinal arteriovenous malformations. The results were consistent with the diagnosis of DSA or surgery.One case was poorly diagnosed.The feeding vessels were correctly determined in 12 cases,and the level of fistulas were correctly displayed in 12 cases.The level of fistulas and feeding vessels were accurately showed in 7 of 10 cases with MRA,while the other 3 cases exhibited normal with DSA.ConclusionsSpinal angiography with 256 MSCT and CE-MRA at 3.0 T can clearly show the extent of spinal vascular malformations,feeding arteries and fistula location.They are safe,noninvasive,convinient and can shorten the time of DSA diagnosis and treatment.They play an important role in diagnosis and treatment of spinal vascular malformations and postoperative follow-up.

Objective:To study the learning curve in laparoscopic left lateral hepatic sectionectomy.Methods:The clinical data of 62 consecutive patients who underwent left lateral hepatic sectionectomy by a single operator from February 2015 to May 2022 in General Hospital of Northern Theater Command were retrospectively analyzed. There were 22 males and 40 females, with mean ±s.d. of (50.7±11.7) years. The learning curve was depicted and evaluated by using the cumulative summation test. The general information, operation and postoperative indicators of the growth level group and the master level group were compared.Results:The average operation time of the 62 consecutive subjects was (172.9±70.1) minutes. Intraoperative blood loss was 100 (50, 200) ml. Two patients were converted to open hepatectomy. Clavien-Dindo grade I postoperative complications occurred in 20 patients (32.3%), with grade Ⅱ in 1 patient (1.6%) and grade Ⅲb in another patient (1.6%). The learning curve reached its highest point on the 20th patient by using the cumulative summation test. The study subjects were then assigned into the growth level group (patient 1-20) and the master level group (patient 21-62). The master level group had a significantly wider spread of patient age [(52.9±11.0) years vs (46.1±11.9) years], decreased operation time [(146.8±55.6) min vs (227.9±66.7) min], shortened drainage tube removal time [4(3, 5) d vs 6(4, 7) d] and decreased postoperative hospital stay [5(5, 7) d vs 6.5(4, 9) d] (all P<0.05) when compared with the growth level group. Conclusion:Left lateral hepatic sectionectomy was safe and feasible, and a single operator went through a learning curve of 20 patients before he/she could master the operation more proficiently.

Objective To investigate the taxonomic structure and diversity of endophytic fungi from Cynanchum bungei Decne., explore the potential microbial resources and functions and provide the theoretical basis for new antitumor endophytic fungi. Methods The diversities of endophytic fungi community in different tissues, species and habitats were analyzed with traditional endophytic bacteria separation method and 18sRNA high-throughput sequencing technology. MTT assay was used to detect the cytotoxic activity of endophytic fungi from Radix Polygoni multiflori. Results 90 strains of endophytic fungi were isolated and identified from roots, stems, and leaves of C. bungei. Among them, Fusarium and Alternaria were the dominant genera. There were 8, 9 and 13 genera from roots, stems and leaves of C. bungei respectively. Among which Alternaria and Colletotrichum were the common genera in different tissues. Further studies showed that 13 endophytic fungi of C.bungei had good anti-tumor activity in vitro, accounting for 14.4% of the total genera. Among them, A. tenuissima LTJ2 and A. alternata LTJ6 had significant anti-tumor activity. Conclusion The endophytic fungi in Cynanchum bungei Decne. have rich diversity. Some strains have significant anti-tumor activity，which can be potential resources for the development of new antitumor agents.

Objective To study the effects of endophytic fungus Epichloë bromicola SH09 on the plant growth and accumulation of active components in Salvia miltiorrhiza, and improve the quality of medicinal plant S. miltiorrhiza. Methods E. bromicola SH09 solid bacterial fertilizer was prepared and co-cultured with S. miltiorrhiza for 60 d and 120 d. Four morphological indexes, fresh weight of roots, dry weight of roots, and the contents of four tanshinones and two phenolic acids in the roots of S. miltiorrhiza from treated group and control group were assayed, respectively. Results After 60 d and 120 d co-culture, E. Bromicola SH09 significantly increased the tiller number, plant height, leaf number, leaf area, fresh weight of roots, dry weight of roots, and the content of tanshinones and phenolic acids in S. miltiorrhiz. Conclusion The endophytic fungus E. bromicola SH09 can effectively promote the plant growth and improve the accumulation of active components in S. miltiorrhiza, which not only broadens the new ecological functions of endophytic fungi, but also improves the quality of medicinal plant S. miltiorrhiza.

Objective:To study the variation in activity in patient′s body with differentiated thyroid cancer (DTC) treated with 131I and external dose level, analyze the relationship between the both, and estimate the correction factor for the dose equivalent rate for the patients with residual activity of 400 MBq. Methods:A total of 43 DTC patients who received 131I therapy for the first time after total thyroidectomy were studied. The dose was 1 850-3 700 MBq and average dose was (2 405±777) MBq. The measurements of residual activity in patient′s body and of dose equivalent rate at 0.3, 1 and 3 m in front of the patients were performed at 2, 6, 20, 22, 24, 27, 30, 44, 46, 48, 54, 68 and 72 h after administration of 131I. Results:The residual activity in patient′s body after 131I therapy varied with time as a function of A= A0 (1.033 16e -0.062 4t+ 0.017 17). It can be estimated that the effective half-life of DTC patients treated with thyroid remnant 131I ablation therapy is 12.19 h. It needs only 26.4-38.9 h to reduce the internal activity to the 400 MBq. The functions of variation with time of normalized dose equivalent rate at 0.3, 1, and 3 m away from patients were: H· 0.3=127.220 7e -0.054 8t+ 3.765 71; H· 1=30.225 8e -0.064 4t+ 0.824 67; and H· 3=4.161 9e -0.061 5t+ 0.167 97, respectively. There was a positive correlation between residual activity and dose equivalent rate at 1 m ( r=0.982, P<0.05), and the function is H· 1=0.025 A+ 1.245. When residual activities in DTC patient′s body were 1 000, 700 and 400 MBq, the corresponding dose equivalent rates at 1 m from patients were 26.2, 18.7 and 11.2 μSv/h, respectively. The correction factors for dose equivalent rate at 0.3, 1 and 3 m from patients with 400 MBq were 0.25, 0.49 and 0.70, respectively. Conclusions:DTC patients with administration of 131I activity below 3 700 MBq need only to be hospitalized for two days to reach the discharge standards. When the residual activity in DTC patient′s body drops to 400 MBq, the dose equivalent rate at 1 m is far less than 25 μSv/h. Simply using the point source formula to estimate the dose equivalent rate around the patient will result in overestimation. Therefore, the correction factor used in the estimation of radiation doses to patients by using the formula needs to be further studied so as to make the model-based estimated result more consistent with the actual situation.

【Objective】 To evaluate the clinical effect of 3D printing technology in autogenous tooth transplantation for tooth loss. 【Methods】 From September 2017 to August 2021, 169 patients (176 teeth) were selected and analyzed regarding age, gender, recipient site, positioning of the donor tooth, transplantation time, and long-term follow-up. 【Results】 A total of 176 autogenous tooth transplants were completed, consisting of 133 cases of traditional autogenous tooth transplantation and 43 cases of autogenous tooth transplantation with 3D printing technology. The donor tooth separation time for autogenous tooth transplantation with 3D printing technology was significantly less than that for traditional autogenous tooth transplantation (P<0.000 1). A total of nine teeth were removed 3 months after the operation due to loosening(autogenous tooth transplantation failure), among which seven failed in traditional tooth transplantation and two failed in autologous tooth transplantation with 3D printing technology. The success rate of traditional tooth transplantation was 77% and the retention rate was 94.7%. The success rate of tooth transplantation with 3D printing technology was 88%, and the retention rate was 95.3%. 【Conclusion】 3D printed tooth donor model can greatly shorten the time of tooth donor, reduce the damage to the periodontal membrane cells of the transplanted teeth, and improve the success rate of tooth transplantation. It is worthy of broad promotion.

Objective To detect the radiation of ¹³¹I in treatment site of a grade A tertiary hospital. Methods A total of 25 patients with thyroid cancer were administrated ¹³¹I at a total dose of 82880 MBq. After administration, the ambient dose equivalent rate of the ward was detected with X- and γ-ray detectors. After patient discharge, surface contamination of the ward was detected with α/β surface contamination meter. During patient hospitalization and on the day of discharge, air samples were collected from ¹³¹I treatment site and office area. The air samples were measured using a HPGe γ-ray spectrometer and the concentration of ¹³¹I in air was calculated. Results The ambient dose equivalent rate in the ward ranged from 0.15 to 0.46 μSv/h. Before ward cleaning, surface contamination ranged from 0.53 to 40.1 Bq/cm² and the highest value was recorded on the toilet. Within 4 h after administration, the concentrations of ¹³¹I in air in treatment site and the corridor of the office area were 1.74 Bq/m³ and 0.66 Bq/m³, respectively. The ventilation air flow rate in the treatment site was 0.50 m/s. Ventilation decreased the concentration of ¹³¹I in air by 29.7%, 79.7%, and 53.3% compared with the previous day during hospitalization and on the day of discharge. Conclusion The radiation of external exposure of ¹³¹I in the treatment site is low and the shielding is effective. Before ward cleaning, the surface contamination is lower than the required limits except for the toilet. Ventilation is the primary way to reduce the concentration of ¹³¹I in air.