The bleeding in liver resection is an important factor influencing the operation risk and postoperative out comes.Hepatic vascular exclusion technique is an effective method to control the bleeding,which has been improved after being widely used in clinical practice.In this paper,the research progress on the clinical application of various kinds of hepatic vascular exclusion techniques was reviewed.

OBJECTIVETo isolate and identify human periodontal ligament stem cells (PDLSC) by improved methods and assess the characteristics of PDLSC ex vivo.

METHODSThe periodontal ligament cells were obtained from the healthy impacted third molars and teeth extracted for orthodontic purposes and used to isolate PDLSC by limiting dilution assay. PDLSC were cultured and expanded in alpha-MEM supplemented with 10% FBS. Colony-forming assay, immunohistochemistry, flow cytometry, osteogenic and adipogenic induction were used to identify PDLSC.

RESULTSThe obtained cells had high colony-forming efficiency and were positive staining for vimentin and negative for pancytokeratin. Flow cytometry revealed that the isolated cells were positive for STRO-1 and CD146 antibodies and most were in the G0/G1 phase of cell cycle. Under specific conditions, they could differentiate to the osteoblast and adipocyte lineages in vitro.

CONCLUSIONLimiting dilution assay is an effective method to isolate PDLSC and the single-cell-derived colonies demonstrate the properties of stem cells in vitro.

Cell Differentiation ; Cell Separation ; Humans ; In Vitro Techniques ; Osteoblasts ; Periodontal Ligament ; Stem Cells

OBJECTIVETo construct a modified and enhanced thymidine kinase (TK) vector regulated by human telomerase catalytic subunit promoter (hTERT) promoter and cytomegalovirus (CMV) enhancer and its killing effect on nasopharyngeal carcinoma in vitro and in vivo and its safety in vivo.

METHODSThe pGL3-basic, as basic vector template, was linked and constructed into TK vector regulated by hTERT promoter and CMV enhancer with mono-promoter vector as control. Enhanced TK expression was confirmed by fluorescent microscopy and real time fluorescent quantitative PCR. Telomerase activity was measured by stretch PCR. Tumour killing effects were examined by MTT and Boyden areola. The effects of enhanced TK on the invasiveness of tumor cell NPC 5-8F and the growth of xenograft implanted in nude mice were investigated.

RESULTSCompared with non-enhanced vector, TK expressed by the enhanced vector significantly increased in NPC 5-8F and MCF-7 cells, telomerase activity was positive in human in NPC 5-8F cells and breast cancer MCF-7 cells and negative in control human blood vessel endothelium ECV-304 cells. After ganciclovir(GCV) treatment, NPC 5-8F cell survival rate and invasiveness decreased and tumor progress of NPC xenograft implanted in nude mice was inhibited, without obvious toxicity effects on mouse liver and kidney.

CONCLUSIONSThe enhanced TK vector regulated by hTERT promoter and CMV enhancer can obviously and specifically inhibit and kill nasopharyngeal carcinoma cells in culture and nasopharyngeal carcinoma xenograft in nude mice in vivo, without obviously toxic side effects on nude mice. The targeted and enhanced TK gene vector with high performance may be a new tumour targeted gene therapy strategy clinically to aim directly at most malignant tumours including nasopharyngeal carcinoma, with more extensive anti-cancer spectrum.

Animals ; Cell Line, Tumor ; Cell Survival ; Cytomegalovirus ; genetics ; Genetic Vectors ; Humans ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Nasopharyngeal Neoplasms ; therapy ; Promoter Regions, Genetic ; Regulatory Sequences, Nucleic Acid ; Telomerase ; genetics ; Thymidine Kinase ; genetics ; Transfection

Objective To investigate the clinical value of multidisciplinary team collaboration (MDT)for the treatment of hip fractures in elderly patients.Methods A total of 157 elderly patients with hip fractures meeting inclusion and exclusion criteria were admitted into our department from 1st September 2015 to 31st December 2017.The patients were randomly divided into the traditional treatment group and the MDT group.The differences in treatment time,cost,postoperative outcomes and postoperative Harris hip function score were compared between the two groups.Results The preoperative length of stay,total hospitalization time and the time of antibiotic use after operation were shorter in the MDT treatment group than in the traditional treatment group (all P ＜0.05).Total costs of treatment and costs for bed,laboratory examinations,and nursing were lower in the MDT treatment group than in the traditional treatment group(all P＜0.05).The off-bed activity time after operation was earlier in the MDT treatment group with femoral neck fractures [(5.36 ± 1.56)d vs.(10.07±2.26)d,P =0.002]than in the traditional treatment group with intertrochanteric fracture patients [(30.26 ± 3.01) d vs.(42.28 ± 3.52) d,P =0.017].Harris hip function score was higher in the MDT treatment group than in the traditional treatment group at 3 and 6 months after surgery (P ＜ 0.05).Conclusions As compared with the traditional treatment mode,MDT treatment mode can shorten the preoperative stay in bed,the length of hospital stay after surgery and the off-bed activity time after operation,reduce hospitalization costs and postoperative complications,and can promote the recovery of hip joint function in elderly hip fracture patients.

OBJECTIVETo observe the effect of postoperative transcatheter hepatic arterial chemoembolization (TACE) and thymosin alpha(1) (T(alpha1)) treatment on recurrence of hepatocellular carcinoma (HCC).

METHODSFrom Jan 2000 to Dec 2002, 57 patients with HCC were randomly divided into three groups: group A (n = 18) received hepatectomy plus postoperative TACE and T(alpha1), group B (n = 23) received hepatectomy plus postoperative TACE and group C (n = 16) received hepatectomy only. The recurrence rate, the time to tumor recurrence and the median survival for the three groups were investigated.

RESULTSFor group A, B and C, the 1 year recurrence rate was 83.3%, 87.0% and 87.5% (P = 0.926), respectively. The time to tumor recurrence was 7.0, 5.0 and 4.0 months (P = 0.039), respectively. The median survival was 10.0, 7.0 and 8.0 months (P = 0.002), respectively.

CONCLUSIONPostoperative TACE plus Talpha(1) treatment for HCC patients does not decrease the recurrence rate but may delay its occurrence and prolong surviving time.

Adjuvants, Immunologic ; administration & dosage ; Adult ; Aged ; Antibiotics, Antineoplastic ; administration & dosage ; Antineoplastic Agents ; administration & dosage ; Carboplatin ; administration & dosage ; Carcinoma, Hepatocellular ; surgery ; therapy ; Chemoembolization, Therapeutic ; Doxorubicin ; administration & dosage ; Female ; Hepatectomy ; Humans ; Iodized Oil ; administration & dosage ; Liver Neoplasms ; surgery ; therapy ; Male ; Middle Aged ; Mitomycin ; administration & dosage ; Neoplasm Recurrence, Local ; prevention & control ; Postoperative Period ; Survival Rate ; Thymosin ; administration & dosage ; analogs & derivatives

OBJECTIVETo determine the reason of thrombocytopenia in patients with liver cirrhosis, we studied the relationship among platelet counts, serum thrombopoietin (TPO) level and spleen index.

METHODSSerum TPO, platelet counts and spleen index were measured in 71 cirrhotic patients. TPO was measured with ELISA method, spleen index were measured on ultrasonography by the same doctor.

RESULTSPlatelet counts in patients with cirrhosis were lower than that of healthy group [(109.20+/-53.39) vs (169.63+/-26.60) x 10(12)/L, P<0.05]. Serum thrombopoietin level in patients with cirrhosis was similar to that of healthy group [(436.42+/-258.97) vs (412.63+/-132.80) pg/ml, P>0.05]. However, serum thrombopoietin level decreased as liver disease aggravated, [(526.13+/-317.44) pg/ml in Child-Pugh grade A, (445.22+/-214.90) pg/ml in grade B and (311.45+/-182.66) pg/ml in grade C, grade A vs. Grade C, P<0.05]. However, decline in platelet counts was accompanied with incline in spleen index coordinately. 35 of 71 cirrhotic patients had normal platelet counts whereas 36 of them had thrombocytopenia. Thrombopoietin levels were higher in non-thrombocytopenia group than in thrombocytopenia group [(529.43+/-282.64) vs. (351.27+/-228.25)pg/ml, P<0.01]; but spleen index of two groups showed no difference [(29.65+/-12.00) vs. (36.35+/-12.68) cm2, P>0.05]. Correlation was found between thrombopoietin level and platelet counts (r=0.252, P=0.025); no correlation was found between spleen index and platelet counts (r=-0.238, P=0.062).

CONCLUSIONThe decline serum TPO levels might play an important role for thrombocytopenia in patients with liver cirrhosis.

Adult ; Female ; Humans ; Liver Cirrhosis ; blood ; pathology ; Male ; Middle Aged ; Platelet Count ; Portal Vein ; pathology ; Spleen ; pathology ; Thrombopoietin ; blood

OBJECTIVETo evaluate the clinical characteristics, treatment and prognosis of advanced adenoid cystic carcinoma (ACC) in the nasal cavity and paranasal sinuses.

METHODSTwenty-one patients with advanced ACC in the nasal cavity and paranasal sinuses were treated in our department between February, 2007 and May, 2016. The clinical manifestations, T-stage, N-status, treatment, histological grade, recurrence and distant metastasis of the tumors were analyzed. Univariate survival analysis was performed with Kaplan-Meier method and Log-rank test, and the factors affecting the prognosis of the patients were explored using multivariate analysis with Cox proportional hazard model.

RESULTSAmong the 21 patients, 10 (47.6%) had ACC containing less than 30% of solid tumor tissues and their overall survival rates at 1, 3, and 5 years were 100%, 100% and 70%, respectively; in the 11 cases (52.4%) with solid tumor tissues no less than 30%, the overall survival rates at 1, 3, and 5 years were 70%, 40% and 10%, respectively, showing significant differences between the two groups (P=0.02). The Log-rank test and survival analysis using the covariate variable model curve indicated a significant impact of the pathological classification on the patients' prognosis. The patients in T3 stage had slightly better prognosis than those in T4 stage; tumors originating from the maxillary sinus had a slightly better prognosis than those from the sphenoid sinus. Surgery combined with radiotherapy resulted in better outcomes of the patients than surgery or radiotherapy alone. Multiariable Cox regression model analysis showed that the pathological classification (P=0.045) and the disease course (P=0.028) were closely related with the prognosis of the patients.

CONCLUSIONACC in the nasal cavity and paranasal sinuses has a low incidence without specific symptoms. Its early diagnosis can be difficult, and most of the patients are in advanced stage upon diagnosis. We recommend comprehensive treatments combining surgery, postoperative radiotherapy and chemotherapy for these patients. The pathological classification, disease course, lesion site, clinical stage, treatment approache, compromise of the peripheral nerves, status at the edge of resection, and postoperative radiotherapy dose can all be factors affecting the prognosis of patients with advanced ACC.

OBJECTIVETo investigate the antagonistic efficacy of tetrandrine (TET) on lung injury induced by acute paraquat poisoning.

METHODSMale Wistar rats were randomly divided into three groups (control group, non-treatment group and treatment group). The tetrandrine of 30 mg/kg was given by gastric lavage six hours after 32 rats were intraperitoneally injected with paraquat 15 mg/kg (treatment group). Then the same dose of tetrandrine was given once a day. Normal saline of the same volume was given by gastric lavage in another 32 rats intraperitoneally injected with paraquat 15 mg/kg (non-treatment group). Seven rats were intraperitoneally injected by normal saline as the control group. Levels of maleic dialdehyde (MDA), activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in plasma and the lung homogenate of three groups were determined at 3 d, 7 d, 14 d and 21 d after exposure to paraquat. Histological changes of the lungs were observed.

RESULTSThe levels of MDA at 3 d both in plasma [(3.65 +/- 0.44) nmol/ml] and the lung homogenate [(9.54 +/- 0.92) nmol/mg pro] of the non-treatment group significantly increased compared with the control group (P < 0.01), the activities of GSH-Px and SOD in plasma at 3 d were significantly less than the control group (P < 0.05 or P < 0.01), the activities of GSH-Px (3 d, 7 d) and SOD (7 d, 14 d) in the lung homogenate were significantly less than the control group (P < 0.05). There were no significant difference in the levels of MDA both in plasma and the lung homogenate between the treatment group and the non-treatment group (P > 0.05). The SOD activities of treatment group on the third day was significantly increased compared with the non-treatment group (P < 0.01 or P < 0.05). Although the activities of GSH-Px in plasma and the lung homogenate of the treatment group on the third day were increased, there was no significantly difference compared with the non-treatment group (P > 0.05). The integral score of pulmonary fibrosis in the treatment group were significantly lower than in the non-treatment group (P < 0.01).

CONCLUSIONTET has antagonistic effect against acute toxicity of paraquat through significant reduction of pulmonary fibrosis.

Acute Disease ; Animals ; Benzylisoquinolines ; therapeutic use ; Disease Models, Animal ; Glutathione Peroxidase ; metabolism ; Lung ; drug effects ; metabolism ; pathology ; Lung Injury ; chemically induced ; drug therapy ; metabolism ; pathology ; Male ; Malondialdehyde ; metabolism ; Paraquat ; poisoning ; Rats ; Rats, Wistar ; Superoxide Dismutase ; metabolism

Based on the computer simulation, we analyzed hydrophobicity, potential epitope of recombined subtypes HIV-1 Env protein (851 amino acids) from Guangxi in China. Compared with conservative peptides of other subtypes in env protein, three sequences (469-511aa, 538-674aa, 700-734aa) were selected to recombine into a chimeric gene that codes three conservative epitope peptides with stronger antigencity, and was constructed in the yeast expression plasmid pPICZB. Chimeric proteins were expressed in Pichia pastoris under the induction of methanol, and were analyzed by SDS-PAGE and Westernblot. The results showed that fusion proteins of three-segment antigen were expressed in Pichia pastoris and that specific protein band at the site of 40kD was target protein, which is interacted with HIV-1 serum. The target proteins were purified by metal Ni-sepharose 4B, and were demonstrated to possess good antigenic specificity from the data of ELISA. This chimeric antigen may be used as research and developed into HIV diagnostic reagents.
Blotting, Western ; Enzyme-Linked Immunosorbent Assay ; Gene Expression Regulation, Viral ; HIV Seronegativity ; immunology ; HIV Seropositivity ; immunology ; HIV-1 ; genetics ; immunology ; metabolism ; Humans ; Pichia ; genetics ; Recombinant Fusion Proteins ; genetics ; immunology ; metabolism ; env Gene Products, Human Immunodeficiency Virus ; genetics ; immunology ; metabolism

OBJECTIVETo observe the effect of postoperative anti-viral therapy using lamivudine and thymosin alpha1 on recurrence of hepatocellular carcinoma (HCC) coexisting with active hepatitis B.

METHODSFrom Jan. 2000 to Dec. 2002, 33 HCC patients with coexisting with active hepatitis B were randomized into two groups: Group I (n = 17) received hepatectomy only, and Group II (n = 16) received hepatectomy and postoperative therapy using lamivudine plus thymosin alpha1. The suppression of HBV-DNA, HBeAg seroconversion rate, tumor recurrence rate and median survival in the two groups were observed and compared.

RESULTSIn Group II and Group I, the 1-year HBV-DNA suppression rate was 100.0% vs 6.0% (P < 0.01), HBeAg seroconversion rate was 62.5% vs 5.9% (P < 0.05), tumor recurrence rate was 81.3% vs 95.5% (P > 0.05), the recurrence time was 7.0 vs 5.0 months (P < 0.01) and median survival 10.0 vs 7.0 months (P < 0.01).

CONCLUSIONAnti-viral therapy using lamivudine and thymosin alpha1 postoperatively may suppress the HBV reaction, delay the recurrence and prolong the survival for patients with HCC with coexisting active hepatitis B.

Adult ; Aged ; Carcinoma, Hepatocellular ; surgery ; therapy ; virology ; DNA, Viral ; drug effects ; Female ; Hepatectomy ; methods ; Hepatitis B ; genetics ; therapy ; Humans ; Lamivudine ; therapeutic use ; Liver Neoplasms ; surgery ; therapy ; virology ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; prevention & control ; Postoperative Period ; Reverse Transcriptase Inhibitors ; therapeutic use ; Survival Rate ; Thymosin ; analogs & derivatives ; therapeutic use