The aim of this study was to evaluate the role of vascular endothelial growth factor (VECF) and its receptor flk-1 system in angiogenesis and progression of human hepatocellular carcinoma (HCC) in vivo, the flk-1 dominant-negative mutant was cloned into the retroviral expression vector pLXSN, and was then packaged by PA317 cells to produce ecotropic retroviruses expressing mutated receptor constructs. 50mm_3 of LCI D-20 intact tissue were subcutaneously or orthotopically implanted in nude mice respectively. At day 1,3,5 after implantation, growing tumor were injected with 0.1 ml retroviral supematants into the site of tumor implantation. Tumor volumes, vascular density and lung metastasis were investigated. The results showed that the transfectants by flk-1 TM formed very small tumors after 21 days, which were less than 10 folds in size compared with control. There were hardly visible vessels in flk-1 TM transfected tumor tissue, whereas rich neovascularization could be found in control. The metastatic nodules in lungs were markedly decreased by dominant-negative flk-l TM (P

OBJECTIVE To investigate the effects of N,N'-Dinitrosopiperazine (DNP) on the cell proliferation of nasal and nasopharyngeal epithelia and the expression levels of TRAF2 and p16 genes in TgN (p53mt-LMP1)/HT transgenic mice and the relationships between them.METHODS The epithelial proliferating characteristics of nasal cavity and nasopharynx in TgN (p53mt-LMP1)/HT cancerous lesion inducing group treated by DNP (TI),TgN (p53mt-LMP1)/HT controlling group (TC), C57BL/6J cancerous lesion inducing group (CI) treated by DNP and C57BL/6J controlling group (CC) were observed for pathological evaluation by HE staining,and the expression levels of TRAF2 and p16 genes in these tissue samples were determined by immunohistochemical methods.RESULTS The occurring rates of precancerous lesions in nasal and/or nasopharyngeal epithelia in TI,TC,CI and CC groups were 90%,10%,0 and 0,respectively (P

Objective To investigate the clinical effect of caffeic acid tablets on hypocytosis induced by radiotherapy in patients with lung cancer. Methods From January 2017 to October 2015,one hundred and twenty patients with lung cancer treated by radiotherapy in No. 88 Hospital of PLA were selected and randomly divided into the observation group and the control group,60 cases in each group. Patients in the observation group were treated by oral caffeic acid tablets 0. 3 g/time,3 times/d until the end of radiotherapy. The control group was treated with radiotherapy alone and did not take any blood raising drugs. When myelosuppression appeared, recombinant human granulocyte colony-stimulating factor Injection or recombinant human interleukin 11 was given till it turned to normal blood. The incidence rate of bone marrow suppression,number of white blood cells (WBC),platelet (PLT) and the efficacy of radiotherapy were observed. Results The incidence rate of bone marrow suppression of the observation group was 16. 67％( 10/60) ,which was significantly lower than that of the control group ( 63. 33％( 38/60 ) ) . The difference was statistically significant (χ2 = 27. 22, P<0. 05 ); the incidence of bone marrow inhibition in the observation group was 0,while the control group was 15. 00％ (9/60) ,and the difference was statistically significant (χ2=9. 73,P<0. 05) . The number of white blood cells and platelets decreased significantly in the two groups after radiotherapy. The number of leukocytes and platelets in the observation group at 1,2,3 and 4 weeks after radiotherapy were significantly higher than those in the control group,the difference was statistically significant (P<0. 05). The effective rate of radiotherapy was 70. 00％ (42/60) in the observation group and 66. 67％ (40/60) in the control group,with no significant difference (χ2=0. 15,P>0. 05) . Conclusion Caffeic acid tablet is effective in preventing leukocyte and thrombocytopenia caused by bone marrow suppression in patients with lung cancer after radiotherapy.

Objective:To analyze the risk factors of deep venous thrombosis (DVT) in patients with tibial plateau fracture during preoperative period.Methods:From July 2017 to October 2019, a total of 264 patients undergoing surgeries of tibial plateau fractures were enrolled. Duplex ultrasonography (DUS) during hospitalization was used to screen for DVT of the bilateral lower extremities. Patients were divided into DVT group and non-DVT group according to results of DUS. Data on demographics, comorbidities, injury-related data, fracture type, laboratory biomarkers were collected and compared between groups with and without DVT.Results:The incidence of preoperative DVT was 39.0% (103/264) among 264 patients with traumatic tibial plateau fractures, and distal thrombosis predominated in DVT group. There were 103 cases in DVT group. 55 were males and 48 were females. The average age was 54.00±11.12. According to the Schatzker classification of tibial plateau fractures, 7 cases belonged to type I, 37 to type II, 2 to type III, 11 to type IV, 29 to type V, and 17 to type VI. There were 161 cases in non-DVT group. 89 were males and 72 were females. The average age was 48.57±13.25. According to the Schatzker classification of tibial plateau fractures, 23 cases belonged to type I, 76 to type II, 2 to type III, 10 to type IV, 33 to type V, and 17 to type VI. Univariate analysis showed that age ( t=3.451, P=0.001), the type of tibial plateau fracture ( χ2=8.314, P=0.004), D-dimer ( χ2=18.552, P<0.001), APTT ( t=2.869, P=0.004), ALB ( t=2.292, P=0.023) and Hb ( t=1.983, P=0.048) were statistically different than those in non-DVT group. Multivariate analysis showed age ( OR=1.033, 95% CI: 1.009, 1.058; P=0.007), the type of tibial plateau fracture ( OR=1.829, 95% CI: 1.014, 3.299; P=0.045) and D-dimer ( OR=1.914, 95% CI: 1.057, 3.464; P=0.032) were independent risk factors. Conclusion:The incidence of DVT in patients with tibial plateau fractures during preoperative period is high, and distal thrombosis is the main part of venous thrombosis of lower extremity. The type of tibial plateau fracture, age and the level of D-dimer are independent risk factors of preoperative DVT in patients with tibial plateau fractures.

Objective To investigate the immunomodulatory effect of pachymaran on cyclosporine A (CsA)-induced lung injury in mice. Methods (i) Fifty male BALB/c mice were randomly divided into five groups (10 mice in each group): normal control (NC) group, 30, 45, and 60 mg/kg CsA groups, and lipopolysaccharide (LPS) group. Except for the NC group, other groups underwent CsA modeling. The NC group was treated with phosphate-buffered saline (PBS), the LPS group with 10 mg/kg LPS eight hours before mice euthanized, and the 30, 45, and 60 mg/kg CsA groups with corresponding doses of CsA for seven consecutive days. After treatment, the body and organ mass of each group were weighed, and the lung, thymus, and spleen indexes were calculated. Hematoxylin-Eosin (HE) staining was performed to observe histopathological changes in the lungs of the mice. The protein expression levels of interleukin (IL)-2 and IL-1β in the blood were detected using enzyme-linked immunosorbent assay (ELISA), and those of surfactant protein D (SP-D), IL-2, and IL-6 in lung tissues were detected by immunohistochemistry (IHC). The mRNA expression levels of SP-D, IL-1β, IL-6, and myeloperoxidase (MPO) in the lung tissues were detected by quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR). (ii) Another 60 BALB/c mice were divided into six groups (10 mice in each group) : NC group, model control (MC) group, 50, 100, and 200 mg/kg pachymaran groups, and polyinosinic-polycytidylic acid [poly(I:C)] group. Except for the NC group, other groups underwent 45 mg/kg CsA modeling. The NC and MC groups were treated with distilled water, the pachymaran groups with corresponding doses pachymaran, and the poly(I:C) group with 0.1 mg/kg poly(I:C) for seven days.The mice were euthanized to obtain tissues and serum for detection. Detection methods were identical to those described in (i) above. Results (i) CsA (30 mg/kg) increased the lung index of mice (P < 0.001), and decreased the spleen index (P < 0.01), thymus index (P < 0.05), and the serum level of IL-2 (P < 0.05). CsA (45 mg/kg) decreased the spleen, thymus indexes, and the serum level of IL-2 (P < 0.01) in mice, and increased the serum level of IL-1β (P < 0.05) and the protein level of lung SP-D (P <0.001). CsA (60 mg/kg) increased the lung index of mice (P < 0.01), the serum level of IL-1β (P < 0.05), the protein level of lung SP-D (P < 0.01), and the mRNA levels of lung MPO and SP-D ( P < 0.05), and decreased the thymus index of mice (P < 0.01). HE staining showed that 30, 45, and 60 mg/kg CsA, and LPS caused pathological changes in the lung tissue of mice. (ii) After pachymaran intervention in MC mice, the spleen and thymus indexes (P < 0.05) were increased in the 100 and 200 mg/kg pachymaran groups, and the lung index was decreased (P < 0.05). Moreover, 50 mg/kg pachymaran increased the thymus index (P < 0.05) and decreased the lung index (P < 0.01) in MC group. Pachymaran (50, 100, and 200 mg/kg) improved lung tissue injury, reduced the serum level of IL-1β (P < 0.001), and the mRNA levels of MPO and SP-D in lung tissues (P < 0.05) of mice. Pachymaran (100 mg/kg) increased the protein level of lung IL-2 (P < 0.01), decreased the protein level of lung SP-D (P < 0.01), and the mRNA level of IL-1β (P < 0.001) in the lung tissues of mice. Pachymaran (200 mg/kg) increased the serum level of IL-2 (P < 0.01) and lung IL-6 of mice (P < 0.05). Pachymaran (50 and 200 mg/kg) increased the mRNA level of IL-6 in the lung tissues of mice (P < 0.05). Conclusion While the immune function of mice was suppressed by CsA, the lung tissue was also damaged. Pachymaran can improve the immunosuppression induced by CsA and improve the lung tissue injury in immunosuppressed mice.