Objective To observe the effects of GABA on proliferation, cell cycle and expression of MMP-2, MMP-9 of pancreatic cancer cell line SW1990. Methods The effects of different concentration of GABA (0 ～ 320 μmol/L) on proliferation and cell cycle of pancreatic cancer cell line SW1990 was investigated by MTT assay and flow cytometry analysis, respectively. Expressions of MMP-2 and MMP-9 proteins were evaluated by Western blot analysis. Results GABA could promote the proliferation of SW1990 cells and influence the distribution of cell cycle, which made less cells of G0/G1 phase and more cells of S and G2/M phase. The value of A570 after GABA pretreatment at a dose of 320 μmol/L was 1. 11 ± 0.03, which was significantly higher than that in the control group (0. 56 ± 0.01, P < 0. 01 ), the cells of G0/G1 phase was (46.18 ± 1.12 )% ,which was significantly lower than (87.29 ± 1.34)% in the control group (P < 0. 01 ) ;the expressions of MMP-2 mRNA, MMP-9 mRNA and their proteins were 8.6, 6.8, 10.5, 8.4, respectively, which were significantly higher than those in the groups of the doses of 0 ～ 40 μmol/L ( P < 0. 05 ). Conclusions GABA could influence the proliferation and expression of MMP of SW1990 cells.

The transforming growth factor-β1 (TGF-β1)/Smad3 signal pathway is related to mutiple physiological and pathological generation mechanism of human being. Up to date, however, the spacial and time information on the phosphorylated Smad3 is still unclear. In this study, the process of Smad3 phosphorylation was observed under the physiological state in the living cells. Firstly, the ECFP-Smad3-Citrine (Smad3 biosensor) fusion protein expression vector was constructed and identified. Then the Smad3 biosensor was transfected into 293T cells. The transfection efficiency and the expressions of fusion proteins were observed in 24 hours. Thirdly, Smad3 biosensor flurorescence resonance energy transfer (FRET) was observed with the inversion fluorescence microscope and measured by the MetaFlour FRET 4. 6 software. Smad3 biosensor transfection efficiency was nearly 40% and the fusion protein was seen under the fluorescence microscope. The FRET ratio of Smad3 biosensor in living 293T cells was decreased after 10 minutes incubation with the ligand of TGF-β1. The period of decreasing CFP and enhancing Citrine signals was about 300 seconds. With the technology of FRET, the TGF-β1/Smad3 signal pathway could be real time monitored dynamically under the physiological condition in living cells.
Fluorescence Resonance Energy Transfer ; Genetic Vectors ; HEK293 Cells ; Humans ; Microscopy, Fluorescence ; Phosphorylation ; Signal Transduction ; Smad3 Protein ; metabolism ; Software ; Transfection ; Transforming Growth Factor beta1 ; metabolism

Objective To explore the effects and mechanisms of hepatitis B virus-X protein (HBx) on invasion and migration of hepatocellular carcinoma (HCC) cells.Methods The retrospective cohort study was conducted.The clinicopathological data of 30 patients with liver tumor (20 with HCC and 10 with benign tumor of liver) who were admitted to the Affiliated Hospital of Xuzhou Medical College between July 2014 and July 2015 were collected.HCC tissues of 20 patients with HCC (with history of HBV infection) were collected by surgical resection and peritumoral normal tissues (outside of tumor capsule) of 10 patients with benign tumor of liver (without history of HBV infection) were collected.The expressions of epidermal growth factor receptor 3 (ErbB3)in HCC tissues and peritumoral normal tissues were detected by immunohistochemistry (IHC).The relative expressions of ErbB3 and HBx in HCC tissues and peritumoral normal tissues were detected by Western blot,and relative expressions of ErbB3 in HepG2 of which green fluorescent protein (GFP) and GFP-HBx were respectively transfected were detected.The relative expressions of ErbB3 mRNA in HepG2 transfected by GFP and GFP-HBx were detected by real-time polymerase chain reaction (RT-PCR).The migration and invasion of HepG2 were respectively detected by Transwell assay with and without matrix.The measurement data with normal distribution were represented as $± s.The comparisons between groups were evaluated with the independent-sample t test.Correlation analysis was done by the Pearson test.Results (1) The expressions of ErbB3 were detected by IHC:relative value of mean optical density (MOD) of ErbB3 in HCC tissues of 20 patients with HCC and peritumoral normal tissues of 10 patients with benign tumor of liver were 2.54± 1.33 and O.99±0.29,respectively,with a statistically significant difference (t =6.542,P ＜ 0.05).(2) The relative expressions of ErbB3 and HBx were detected by Western blot:relative expressions of ErbB3 and HBx were respectively 0.79±0.13,1.10±0.28 in HCC tissues of 10 patients with HCC and 1.07±0.17,0 in peritumoral normal tissues of 10 patients with benign tumor of liver,with statistically significant differences (t =3.229,19.486,P＜0.05).The results of Pearson test showed that there was a positive correlation of expression between ErbB3 and HBx in HCC tissues (r=O.637,P＜ 0.05).(3) The relative expressions and transcriptional levels of ErbB3 were detected by Western blot and RT-PCR:relative expressions of ErbB3 in HepG2 of which GFP and GFP-HBx were respectively transfected were O.75±0.11 and 1.10±0.10,respectively,with a statistically significant difference (t=4.291,P＜0.05).The relative expressions of ErbB3 mRNA in HepG2 of which GFP and GFP-HBx were respectively transfected were O.38±0.03 and O.94±0.07,respectively,with a statistically significant difference (t=11.703,P＜O.05).(4) The effects of ErbB3 on migration and invasion of HepG2:numbers of transmenbrane cell in HepG2 of which His and His-ErbB3 were respectively transfected by Transwell assay with matrix were respectively 271± 18 and 463± 31,respectively,with a statistically significant difference (t =8.202,P＜0.05).Numbers of transmenbrane cell in HepG2 of which His and His-ErbB3 were respectively transfected by Transwell assay without matrix were respectively 315±38 and 549±34,respectively,with a statistically significant difference (t =8.310,P＜0.05).Conclusion HBx protein can promote the invasion and migration of hepatocellular carcinoma cells through up-regulating expressions of ErbB3 protein.

Objective To evaluate the feasibility and safety of resection of tumors in hepatic centric area. Methods The clinical data of 36 patients with tumors in hepatic centric area treated by resection in our hospital from Jan 1996 to Dec 2001 were retrospectively analyzed. In this series,there were 26 cases of liver cancer and 10 cases of benign tumor. Of the 36 patients,the tumor involved the first porta hepatis in 13 cases, involved the second porta hepatis in 10 , involved the third porta hepatis in 5 , involved both the first and second porta hepatis in 3, and involved both the second and third porta hepatis in 5 cases. Results During the operation, massive hemorrhage occurred in 4 cases(11.1%). Postoperative complications occurred in 11 patients(30.5%),including liver function failure in 1 case (2.7%), biliary fistula in 2 cases (5.5%), pleural effusion in 6 cases (16.7%), subphrenic infection in 1 case (2.7%),and abdominal incisional hernia in 1 case (2.7%). All patients recovered except that one died of acute hepatic failure after the operation. Conclusions Although the surgery for this tumor is quite difficult and risky, if enough attention is paid to the choice of the patient,and the meticulous surgical technique,the operation safety and therapeutic result of the operation could be improved.

BACKGROUND:Islet and islet cel transplantation for the treatment of diabetes has achieved effect, but the research is limited dut to the shortage of islet and immune rejection. OBJECTIVE:To observe the effect of transplantation of islet-like cells that in vitro differentiated from bone marrow mesenchymal stem cells on the treatment of diabetes in rats. METHODS:The rat bone marrow mesenchymal stem cells were induced with basic fibroblast growth factors and hepatocyte growth factors, and then received immunocytochemistry staining to detect the induction. The Sprague Dawley rats received intraperitoneal injection of streptozotocin to establish the diabetes models. After modeling, the rats were randomly divided into control group and experimental group (transplanted with induced islet-like cells). The experimental group was transplanted with the induced islet-like cells through renal capsule, and the control group was transplanted with normal saline in the same dose. The blood glucose and body mass of the diabetes rats were observed after transplantation. RESULTS AND CONCLUSION:The bone marrow mesenchymal stem cells could differentiate into islet-like cells after in vitro induced with basic fibroblast growth factors and hepatocyte growth factors. There was no significant change in blood glucose of the control group after transplantation (P>0.05), and the blood glucose of the rats in the experimental group was significantly decreased compared with the control group (P<0.05). The bone marrow mesenchymal stem cells can differentiate into islet-like cells after in vitro induced with the induction system containing basic fibroblast growth factors and hepatocyte growth factors, and the islet-like cells have a certain ability of insulin secretion. The transplantation of induced islet-like cells after transplanted into the diabetes rats through renal capsule can decrease the blood glucose level of the rats.

Objective To study the clinical value of 16-slice spiral CT combined with MMP-9 and TIMP-1 in assessing carotid atherosclerosis in elderly cerebral infarction(CI) patients.Methods One hundred and eighty-six CI patients served as group A and 190 asymptomatic carotid atherosclerosis patients served as group B with 90 healthy subjects served as a control group in this study.The patients in group A were further divided into unstable plaque(A-1) group,stable plaque(A-2) group and plaque-free(A-3) group while those in group B were further divided into unstable plaque(B-1) group,stable plaque(B-2) group and plaque-free(B-3) group.The patients included in this study underwent multislice spiral CT angiography(MSCTA) and Doppler ultrasonography.Their serum levels of MMP-9 and TIMP-1 were measured.Their carotid artery steno sis and plaques were detected.The efficacy of MMP-9 and TIMP-1 in diagnosis of unstable plaques in CI patients was analyzed.Results The rate of mild stenosis detected by MSCTA was significantly lower while that of severe stenosis detected by MSCTA was significantly higher in group A than in group B(23.1％ vs 48.9％,P=0.000;48.4％ vs 16.8％,P=0.000).The rate of unstable plaques detected by MSCTA and ultrasonography was 81.7％ and 83.2％ respectively in groups A and B.The rate of stable and unstable plaques detected by MSCTA was significantly higher in group A than that detected by CT in group B(147±71 HU vs 11±20 HU,155±81 HU vs 9±21 HU,P=0.000).The serum levels of MMP-9 and TIMP-1 were significantly higher in A-1 group and A-2 group,B-1 group and B-2 group than in control group(P＜0.01).The area under the ROC curve for MMP-9 and TIMP-1 in diagnosis of unstable plaques was 0.891 and 0.814 respectively.Conclusion MSCTA can accurately detect carotid atherosclerosis in elderly CI patients.However,it is easy to misjudge the nature of plaques.Serum levels of MMP-9 and TIMP-1 can effectively diagnose unstable plaques and can thus be used as an important supplement to MSCTA.

Objective Based on DRG evaluation indicators,research an evaluation method that can comprehensive-ly evaluate the medical service capacity and efficiency of clinical departments in hospitals.Methods Using the front page of inpatient medical records from a tertiary hospital in Xuzhou in 2022 as a sample,obtaining DRG related indi-cators through the China Healthcare Security Diagnosis Related Groups 1.1 grouping system.Based on the number of DRG,CMI,TEI,and CEI indicators,use TOPSIS method to comprehensively evaluate the quality of medical ser-vices in clinical departments.Results The widest coverage of medical services is in General Surgery,with a DRG group of 325;The most difficult medical service is in the Emergency Department,with a CMI value of 1.45;The best time efficiency is in Ophthalmology,with a TEI of 0.56,The Dermatology has the best cost efficiency,with a CEI of 0.36;TOPSIS comprehensive evaluation shows that the top five are Pediatrics,General Medicine,Emergen-cy Department,General Surgery,and Gastroenterology,and the bottom five are Dentistry,Burn Unit,Orthope-dics,Neurosurgery,and CCU.Conclusion The TOPSIS method based on DRG integrates two dimensions of medical service capability and medical service efficiency,and horizontally compares clinical departments.The evaluation re-sults are more objective,reasonable,and accurate,which can provide a methodological basis for hospital refined management.

Objective Based on DRG evaluation indicators,research an evaluation method that can comprehensive-ly evaluate the medical service capacity and efficiency of clinical departments in hospitals.Methods Using the front page of inpatient medical records from a tertiary hospital in Xuzhou in 2022 as a sample,obtaining DRG related indi-cators through the China Healthcare Security Diagnosis Related Groups 1.1 grouping system.Based on the number of DRG,CMI,TEI,and CEI indicators,use TOPSIS method to comprehensively evaluate the quality of medical ser-vices in clinical departments.Results The widest coverage of medical services is in General Surgery,with a DRG group of 325;The most difficult medical service is in the Emergency Department,with a CMI value of 1.45;The best time efficiency is in Ophthalmology,with a TEI of 0.56,The Dermatology has the best cost efficiency,with a CEI of 0.36;TOPSIS comprehensive evaluation shows that the top five are Pediatrics,General Medicine,Emergen-cy Department,General Surgery,and Gastroenterology,and the bottom five are Dentistry,Burn Unit,Orthope-dics,Neurosurgery,and CCU.Conclusion The TOPSIS method based on DRG integrates two dimensions of medical service capability and medical service efficiency,and horizontally compares clinical departments.The evaluation re-sults are more objective,reasonable,and accurate,which can provide a methodological basis for hospital refined management.

Objective Based on DRG evaluation indicators,research an evaluation method that can comprehensive-ly evaluate the medical service capacity and efficiency of clinical departments in hospitals.Methods Using the front page of inpatient medical records from a tertiary hospital in Xuzhou in 2022 as a sample,obtaining DRG related indi-cators through the China Healthcare Security Diagnosis Related Groups 1.1 grouping system.Based on the number of DRG,CMI,TEI,and CEI indicators,use TOPSIS method to comprehensively evaluate the quality of medical ser-vices in clinical departments.Results The widest coverage of medical services is in General Surgery,with a DRG group of 325;The most difficult medical service is in the Emergency Department,with a CMI value of 1.45;The best time efficiency is in Ophthalmology,with a TEI of 0.56,The Dermatology has the best cost efficiency,with a CEI of 0.36;TOPSIS comprehensive evaluation shows that the top five are Pediatrics,General Medicine,Emergen-cy Department,General Surgery,and Gastroenterology,and the bottom five are Dentistry,Burn Unit,Orthope-dics,Neurosurgery,and CCU.Conclusion The TOPSIS method based on DRG integrates two dimensions of medical service capability and medical service efficiency,and horizontally compares clinical departments.The evaluation re-sults are more objective,reasonable,and accurate,which can provide a methodological basis for hospital refined management.

Objective Based on DRG evaluation indicators,research an evaluation method that can comprehensive-ly evaluate the medical service capacity and efficiency of clinical departments in hospitals.Methods Using the front page of inpatient medical records from a tertiary hospital in Xuzhou in 2022 as a sample,obtaining DRG related indi-cators through the China Healthcare Security Diagnosis Related Groups 1.1 grouping system.Based on the number of DRG,CMI,TEI,and CEI indicators,use TOPSIS method to comprehensively evaluate the quality of medical ser-vices in clinical departments.Results The widest coverage of medical services is in General Surgery,with a DRG group of 325;The most difficult medical service is in the Emergency Department,with a CMI value of 1.45;The best time efficiency is in Ophthalmology,with a TEI of 0.56,The Dermatology has the best cost efficiency,with a CEI of 0.36;TOPSIS comprehensive evaluation shows that the top five are Pediatrics,General Medicine,Emergen-cy Department,General Surgery,and Gastroenterology,and the bottom five are Dentistry,Burn Unit,Orthope-dics,Neurosurgery,and CCU.Conclusion The TOPSIS method based on DRG integrates two dimensions of medical service capability and medical service efficiency,and horizontally compares clinical departments.The evaluation re-sults are more objective,reasonable,and accurate,which can provide a methodological basis for hospital refined management.