Background Corneal refractive surgery has significant effects on corneal biomechanical properties.However,there are few study on large scale population with corneal biomechanical properties in the myopic population before corneal refractive surgery.Objective This study was to evaluate the change of corneal biomechanical properties and influence factors in myopic eyes using ocular response analyzer (ORA).Methods A prospective cohort study was carried out in Beijing Tongren Eye Center from April 2010 to January 2011.Corneal hysteresis (CH) and corneal resistance factor (CRF) were detected using ORA in 1 792 eyes of 896 myopic subjects who were going to receive corneal refractive surgery under the informed consent.According to different spherical equivalent (SE) the eyes were grouped into-0.25-＜-3.0 D group,-3.0-＜-6.0 D group,-6.0-＜-9.0 D group,-9.0-＜-12.0 D group,-12.0-＜-15.0 D group and ≥-15.0 D group and according to different central corneal thickness (CCT),the eyes were grouped into ＜500 μm group,500-＜550 μm group,550-＜600 μm group and≥600 μm group.The CH value and CRF value in different SE groups or different CCT groups were compared,and the factors influencing CH and CRF were analyzed by Pearson correlation analysis.Results The mean CH and CRF value were (9.84±1.52)mmHg (1 mmHg =0.133 kPa) and (10.46±1.71) mmHg,respectively in the myopic eyes.The CH values were (10.35±1.53),(10.07±1.55),(9.81±1.46),(9.71±1.59),(9.35±1.55) and (9.23±1.28) mmHg in the-0.25-＜-3.0 D group,-3.0-＜-6.0 D group,-6.0-＜-9.0 D group,-9.0-＜-12.0 D group,-12.0-＜-15.0 D group and ≥-15.0 D group,respectively,showing a significant difference among the groups (F=20.69,P＜0.01),and the CH values in the-6.0-＜-9.0 D group,-9.0-＜-12.0 D group,-12.0-＜-15.0 D group and ≥-15.0 D group were significantly lower than those in the-6.0-＜-9.0 D group,-9.0-＜-12.0 D group (all at P＜0.01).There was no significant difference in the CRF values among different SE groups (F =0.65,P =0.49).CH and CRF values were increasing with the raise of CCT,with evidently differences among the CCT＜500 μm group,500 μm ≤ CCT＜550 μm group,550 μm≤ CCT＜600 μm group and CCT≥ 600 μm group (CH:F=110.99,P＜0.01;CRF:F =84.35,P＜0.01),and the CH and CRF values were significantly higher in the 550 μm ≤ CCT＜600 μm group and CCT ≥600 μm group than those in the CCT＜500 μm group (all at P＜0.01).CH showed a positive correlation with SE (r =0.24,P＜0.01),and no significant correlation between CRF and SE (r =0.03,P =0.20).The CH and CRF showed the positive correlations with the CCT (r=0.42,0.57,both at P＜0.01).In addition,CH and CRF values increased as the increases of SE,corneal curvature (CC) and CCT values,with the regression equation of CH =-7.87+0.08SE+0.16CC+0.02CCT (R2=0.26,P＜0.01) and CRF=-11.42+0.14CC+0.03CCT (R2=0.34,P＜0.01),respectively.The CH and CRF did not change with the age and gender in the subjects.Conclusions Corneal biomechanical properties including CH and CRF were positively correlated with CCT,CC and SE.

Herba Epimedii (named Yinyanghuo in Chinese) of the family Berberidaceae is one of the most famous traditional Chinese medicines (TCMs) recorded in the pharmacopoeia of the People's Republic of China.Total flavonoids of Epimedium (TFE) are considered to be its active components.TFE content was measured by ultraviolet method and its representative constituents,icariin and epimedin C,were determined by high performance liquid chromatography.The test results from 36 samples of 4 species showed that the contents differed significantly in different species.The average data of the summation (icariin and epimedin C) content were 20.83,7.61,14.43,23.29 mg/g in Epimedium pubescens Maxim.,E.koreanum Nakai.,E.brevicornum Maxim.,E.sagittatum (Sieb.Et Zucc.) Maxim.,respectively.Both E.sagittatum and E.pubescens performed better than the other two batches.E.sagittatum hardly has any circulation in Chinese herbal medicine market.The results showed that E.pubescens,which had much more amounts of icariin,epimedin C and TFE than those of other species,has a better quality and may be considered as potential anti-osteoporosis drug.

Objective To study the expression of Notch3 in pancreatic ductal adenocarcinoma (PDAC) and to find out its relationship with clinical features and overall survival in patients with pancreatic ductal adenocarcinoma.Methods PDAC and adjacent non-cancerous tissues from 80 patients who under went surgery for primary PDAC in the Affiliated Tumor Hospital of Zhengzhou University were collected between 2008 and 2015.The specimens were divided into two subgroups by immunohistochemical staining of Notch3:the low expression group (0-4 points) and the high expression group (5-12 points).Correlations between expression of Notch3 with clinical features and prognosis of patients with PDAC were analyzed.Results A high expression of Notch3 gene was significantly associated with tumor grade,metastasis,venous invasion and TNM staging.Univariate Cox regression analysis showed that metastasis,venous invasion,TNM stage and protein expression of Notch3 were strongly correlated with overall survival of patients.Multivariate analysis showed that metastasis,TNM stage and Notch3 were independent risk factors of overall survival in patients with PDAC.Kaplan-Meier survival curves indicated that a high expression of Notch3 was an important risk factor of poor survival.Conclusions A high expression of Notch3 was significantly associated with progression and poor prognosis of PDCA.Notch3 may serve as a new indicator of PDAC progression and patient survival outcomes.

Objective To evaluate laparoscopic splenectomy through amputation of secondary splenic pedicles.Methods From February 2010 to March 2016 33 patients underwent laparoscopic splenectomy.Patients were followed up by outpatient examination and telephone interview.Follow-up period ended in April 2016.Results All the 33 patients successfully underwent laparoscopic amputation of secondary splenic pedicle splenectomy.The operation time and volume of intraoperative blood loss were (155 ± 42) min and (210 ± 50) ml.Three patients had postoperative complications including two with ascites sand one with small amount splenic fossa bleeding.All the patients were followed up for a median time of 21 months (range,1-65 months).During the follow-up,1 patient died of hepatic encephalopathy and 32 patients were doing well.Conclusion Laparoscopic amputation of secondary splenic pedicle splenectomy is safe and feasible.

Objective To investigate the clinical efficacy of precise liver resection of liver tumors adjacent to the main pipeline.Methods The retrospective and descriptive study was conducted.The clinical data of 22 patients who underwent precise resection of liver tumors adjacent to the main pipeline in the Affiliated Tumor Hospital of Zhengzhou University between December 2014 and June 2016 were collected.According to preoperative precise evaluation and fully intraoperative exposed tumors,different methods of blood flow occlusion were choosed timely,and then precise resection of the liver was evaluated based on tumor location and size,relationship between tumor and blood vessels and the degree of liver cirrhosis.The operation procedures,operation time,time of liver resection,volume of intraoperative blood loss,number of patients with perioperative blood transfusion,postoperative complications,duration of postoperative hospital stay and follow-up were observed.The follow-up was performed by outpatient examination and telephone interview up to September 2016.Tumor recurrence of patients with hepatocellular carcinoma (HCC) was monthly detected by alpha-fetoprotein retest and color Doppler ultrasound of the liver or computed tomography (CT) within 3 months postoperatively.Tumor recurrence of patients with cholangiocarcinoma was monthly detected by tumor marker retests,color Doppler ultrasound of the liver or CT,and then patients without tumor recurrence received reexamination once every 2 months after 3 months.Patients with liver hemangioma were followed up once every 2-3 months and once every 6 months after half a year,and follow-up included the liver function,ultrasound and other imaging examinations to detect the tumor recurrence.Measurement data with normal distribution were represented as-x±s.Results All the 22 patients underwent successful precise resection of liver tumors.Twenty patients received intraoperative ultrasound localization.Blood flow occlusion of 22 patients:Pringle was conducted in 6 patients,treatment of the corresponding hepatic pedicle in 3 patients,selective hepatic blood flow occlusion in 8 patients,total hepatic blood flow occlusion in 2 patients and non-hepatic portal occlusion in 3 patients.Precise resection of the liver of 22 patients:1 patient underwent right trisegrnentectomy,2 underwent left hepatectomy,2 underwent segment Ⅳ a resection of the liver,2 underwent segment Ⅳ resection of the liver,3 underwent segment Ⅴ resection of the liver,3 underwent segment Ⅷ resection of the liver,1 underwent middle lobe resection of the liver and 8 underwent partial resection of the liver.Operation time,time of liver resection,volume of intraoperative blood loss and number of patients with perioperative blood transfusion were (213±39) minutes,(57± 19) minutes,(518± 98) mL and 3,respectively.Of 22 patients,5 with postoperative complications were improved after symptomatic treatment,including 2 with effusion at surgical site,2 with right pleural effusion and 1 with bile leakage.The duration of postoperative hospital stay of 22 patients was (8.9± 1.6)days.Twenty-one patients were followed up for 3-20 months,with a median time of 12 months.Two of 22 patients had recurrence during the follow-up,and no recurrence at surgical site was detected.Conclusion Precise resection of liver tumors adjacent to the first and second hepatic hilum is safe and feasible,with the advantages of less intraoperative bleeding and low incidence of postoperative complications.

Sorafenib is the only molecular targeted drug therapy for advanced liver cancer recommended by the European Association for the study of liver diseases (EASL), American Association for the study of liver diseases (AASLD) and the United States Food and Drug Administration (FDA). As a multi kinase inhibitors, sorafenib can inhibit multiple signal transduction pathways of tumor cell proliferation and angiogenesis and obviously prolong the late stage of disease progression time and overall survival in patients with hepatocellular carcinoma (HCC). Criteria for evaluation of the efficacy of sorafenib in the treatment of advanced hepatocellular carcinoma (HCC) is increasingly perfect. The author gives a brief overview of the molecular mechanism, efficacy and safety and efficacy evaluation criteria of sorafenib in the treatment of advanced liver cancer.

Objective:To investigate the feasibility and safety of laparoscopic liver tumor resection in children.Methods:The clinical data of 6 children undergoing laparoscopic liver tumor resection from June 2018 to March 2020 in the Affiliated Tumor Hospital, Zhengzhou University were retrospectively analyzed.Results:There were 4 males and 2 females among the 6 cases, with the average age of (7±2)years.All the children were admitted to the hospital with a liver occupying examination due to physical discomfort.Preoperative diagnosis: 3 cases of hepatoblastoma, 1 case of primary liver cancer, 1 case of hepatic adenoma and 1 case of hepatic nodular hyperplasia.All the children successfully completed laparoscopic liver tumor resection without conversion to open surgery.Among them, 3 children obtained left hemihepatectomy, 1 child underwent hepatic left lobectomy, 1 child was given VI hepatectomy, and 1 child accepted hepatic caudate lobectomy.The operation time was(90±9)min, and the average intraoperative blood loss was (83±26) mL.All children had no blood transfusion during or after operation.There were no bleeding, bile leakage, infection and liver failure after operation.All children had no gastric tube before surgery and the fluid diet was given on the first day after operation, and the postoperative median hospital stay was 4(3-5) days.The pathology were consis-tent with the preoperative diagnosis, and the resections were all radical operation resections.The follow-up period was from 2 to 23 months, and all the children recovered well and no recurrence was observed.Conclusions:Laparoscopic liver tumor resection in children is safe and feasible, which can minimize trauma, reduce intraoperative bleeding and shorten the hospital stay without increasing the incidence of postoperative complications.Laparoscopic liver tumor resection in children has certain advantages.

Hepatocellular carcinoma (HCC) is one of the most common malignant tumors, and its features of insidious onset, rapid development, and high recurrence bring great challenges to the long-term survival of HCC patients. Molecular-targeted drugs and immune checkpoint inhibitors have become the research hotspots in the treatment of HCC, and a large number of clinical trials have found that combined therapy has achieved a good clinical effect. This article mainly introduces the application of combined therapy with molecular-targeted drugs and immune checkpoint inhibitors and other combined therapies in HCC and points out that combined therapy related to systemic therapy or local therapy has become the latest research hotspot in HCC treatment.

Objective To investigate the efficiency and safety of allogeneic hematopoietic cell transplantation for malignant hematological diseases in patients older than 50 yeas of age. Methods From May 2002 to January 2010, 35 patients (＞ 50 years) with malignant hematological diseases received allogeneic hematopoietic cell transplantation. In 35 patients, 18 patients were conditioned with non-myeloablative regimen and 17 patients with myeloablative regimen. The outcome,engraftment and prognosis of allogeneic hematopoietic cell transplantation were analyzed. Results The hematopoetic reconstitution was achieved in 32 of 35 patients. The median time of granulocyte count exceeding 0. 5 × 109/L was 12 days and the that of platelet count exceeding 20 × 109/L was 17days. The cumulative incidence of aGVHD was 48. 6 %, and 37. 9 % patients developed cGVHD.The estimate probability of cumulative survival at 5 years was 48. 5 %, The estimate probability of cumulative mortality rate was 51.5 %, and the estimated transplant-related mortality was 22. 9 %.The relapse rate was 11.4 %. There was significant difference except for the incidence of cGVHD.Conclusion Allogeneic hematopoietic cell transplantation may be appropriate for older patients with malignant hematological diseases.

Objective To explore the influence of the killer cell immunoglobulin like receptor (KIR) gene polymorphism on cytomegalovirus (CMV) infection and pathogenesis after hematopoietic stem cell transplantation (HSCT).Methods The KIR genotype was determined by sequence-specific primer polymerase chain reaction (PCR-SSP) in 138 pairs of donors and recipients before HSCT during October,2005 and May,2011.Posttransplant monitoring for CMVpp65 antigen was performed by indirect immune histochemically assays since week 2 after transplantation.The differences between CMV positive group and negative group,inhibitive and active KIR of donors and recipients,and KIR haplotype frequency of donors and recipients were analyzed.Results There were no significant differences in frequency of KIR gene and haplotype AA,AB,BB between the donors and recipients.The frequencies of 2DS2 and 2DS4 * 003-007 of donors in CMV positive group were obviously lower than those in CMV negative group with significant differences(8％ vs 16％,P =0.0420;3％ vs 13％,P =0.0050).There was no significant difference in KIR gene between CMV positive group and CMV negative group.The CMV infection rates of haplotype AA,BB,AB donors were 64.38％,36.84％ and 50.00％,while CMV infection rates of haplotype AA,BB,AB recipients were 53.73％,46.15％ and 51.72％,respectively.The CMV infection rate was higher in the patients received KIR haplotype AA donor than in those received KIR haplotype BB donor (36.84％ vs 64.38％,P =0.0299).2DS4 * 003-007 and haplotype BB of donor were found associated with CMV infection in multifactor analysis.Conclusion KIR genotypes of donors are associated with CMV infection after HSCT.