ObjectiveTo study the changes and clinical significance of DNA ploidy,S-phase fraction(SPF),proliferating index(PI) in colorectal carcinoma.MethodsIn 40 cases of colorectal carcinoma (colorectal carcinoma group ),40 cases corresponding cancer-adjacent tissue (cancer-adjacent tissue group ),12 cases of precancerous lesions (precancerous lesions group) and 10 cases of normal colorectal mucosa coli (normal colorectal mucosa coli group),DNA ploidy,SPF and PI were detected with flow cytometry and compared.ResultsDNA diploid was 7 cases,DNA heteroploid was 33 cases in colorectal carcinoma group,35,5 cases in cancer-adjacent tissue group,10,2 cases in precancerous lesions group,10,0 case innormal colorectal mucosa coli group,there were significant differences among them(P＜ 0.01 ).SPF and PI in colorectal carcinoma group (35.36 ± 7.45,42.92 ± 6.81 ) were significantly higher than those in cancer-adjacent tissue group (20.82 ±5.51,31.34 ±4.88),precancerous lesions group (21.13 ± 5.07,31.70 ±5.59) and normal colorectal mucosa coli group ( 19.93 ± 3.73,32.01 ± 4.99),there were significant differences among them(P＜ 0.01 ).DNA ploidy was significantly correlated with Dukes staging (P=0.027) and the differentiation of colorectal carcinoma (P =0.030).ConclusionsDNA ploidy,SPF,PI may get some molecular biologycharacteristic and proliferation activity of colorectal carcinoma at molecule level,which may be helpful for treatment and evaluation of prognosis of colorectal carcinoma.

ObjectiveTo summarize the experience of gastric D2 operation and evaluate the feasibility and safety of peripheral vascular choroid of lymph node dissection.Methods A retrospective study was adopted to analyze the redical D2 operation procedure and operation results 24 advanced gastric cancer cases,summarizing the experience of D2 radical gastrectomy operation for gastric cancer.The number of resected lymph nodes,operation bleeding volume,postoperative complications were analyzed to evaluate the feasibility and safety of operation.Results All 24 cases undergoing D2 radical gastrectomy operation of advanced gastric cancer were successful,and got the R0 resection.A total of 634 lymph nodes were excised in all the cases,averaged 26.42.A totle of 206 metastatic lymph nodes were found,metastasis rate being 32.49％.Operation bleeding volume was averaged 264.58 mL.The postoperative complication rate was 25％,anastomotic bleeding in 1 case,input loop jejunum fistula of esophageal jejunum anastomosis in 1 case,hyperamylasemia and 2 cases reflux esophagitis in 2 cases respectively.Conclusions D2 radical gastrectomy operation of gastric cancer is safe and feasible on the basis of mastering perigastric anatomy and master of lymph node excision technology and anatomical hierarchy separation.

Objective To study the effect of histone deacetylase inhibitors on cell cycle of breast cancer cell line MCF-7.Methods The breast cancer cell line MCF-7 was treated by histone deacetylase inhibitors (TSA、SAHA、CS055、MS-275)respectively and observed by MTT assay after 24 hours,48 hours,72 hours,96 hours.The chosen inhibitor was used to treat MCF-7 cell in different concentration.The flow cytometry was used to detect the Sphase cell and Cyclin A2,Cyclin D1.SPSS 10.0 was used to analyze the data.Results Within the four inhibitors,SAHA showed the most powerful effect of depression of cell growth and time-effect relation.The percentage of Sphase cells and level of Cyclin A2 decreased,the level of Cyclin D1 increased.Conclusions SAHA is the most powerful histone deacetylase inhibitors for breast cancer cell MCF-7,the effect of depression of cell growth shows time-effect relation.Cyclin A2 and Cyclin D1 were involed in this regulation of cell cycle.

【Objective】 To investigate the correlation between D-dimer, serum potassium and thromboelastography parameters and progressive hemorrhagic injury (PHI) after brain injury. 【Methods】 The data of 209 patients with traumatic brain injury (TBI) in our hospital from January 2018 to May 2021 were collected and analyzed. The patients were divided into PHI group (161 cases) and non-PHI group (48 cases) according to CT scan whether the total bleeding lesions had increased by 25%. Univariate analysis and multivariate Logistic regression were used to analyze the risk factors of PHI, and receiver operating curve (ROC) was used to analyze the predictive value of D-dimer, serum potassium and thromboelastography (TEG) parameters used alone and in combination. 【Results】 PHI occurred in 48 (23.0 %) out of 209 TBI patients. In univariate analysis, there were statistically significant differences in GCS score, age, light emission, systolic blood pressure, serum potassium, blood calcium, blood glucose, R value, PT, APTT, INR, D-dimer, arachnoid hemorrhage, subdural hematoma, cerebral contusion and midline location between the two groups (P<0.05). Five independent risk factors were determined by multivariate Logistic analysis (P<0.05): D-dimer ≥3.52 μg/mL, serum potassium <3.70 mmol/L, R value ≥5.65 min, subdural hematoma and cerebral contusion. PHI model was constructed according to independent risk factors, and the maximum area under the curve (AUC) of D-dimer plus serum potassium plus R value plus subdural hematoma plus cerebral contusion was 0.889 9. 【Conclusion】 D-dimer ≥3.52 μg/mL, serum potassium <3.70 mmol/L, R value ≥5.65 min, subdural hematoma and cerebral contusion are significant influences for PHI occurrance in TBI patients.

Objective:To analyze the problems and risk factors of the investigator initiated out-of-range trial, propose countermeasures and suggestions, and provide reference for improving project standardization and quality, and preventing research risks.Methods:Through literature analysis and field research, combined with personal work experience, this study sorted and analyzed the problems in the regulation of out-of-range IIT conducted in hospital, and proposed countermeasures.Results:Through analysis, it was found that the current out-of-range IIT trial in China faces 5 problems: imperfect management regulations, incomplete IIT management organizational system in medical institutions, insufficient scientificity of research protocols, insufficient ethical review, and insufficient research funds.Conclusions:Out-of-range IIT is of great significance in promoting pharmaceutical innovation. Standardized management of such projects requires the efforts of regulatory authorities, medical institutions, and ethics committees, as well as the continuous improvement of researchers' awareness and research capabilities to promote the orderly, high-quality, and rapid development of IIT. Based on the above analysis, this article proposed countermeasures and suggestions: at the national level, summarize practical experience from various regions as soon as possible, improve IIT management regulations and technical guidelines; establishing clinical research and design guidance departments in medical institutions and strengthening scientific review; the ethics committee formulates ethical review standards and processes for out-of-range IIT projects to enhance review capabilities; establish a normalized clinical research training mechanism in hospitals; expand and standardize the channels for IIT funding.