Publications (30)59.62 Total impact
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Article: [Effects of endostatin and doxycycline on microcirculation patterns in melanoma and their relevant molecular mechanisms].
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ABSTRACT: To investigate the effects of endostatin and doxycycline on microcirculation patterns in melanoma and their molecular mechanisms. To establish mouse B16 melanoma model by subcutaneous injection of B16 melanoma cell suspension. The mice were divided into 3 experimental groups and 1 control group. To treat the mice in the 3 experimental groups with endostatin, doxycycline, endostatin and doxycycline, respectively, and the control group without any treatment. The tumor volume was measured and recorded to make comparison of their growth rate. To assess the expression of MMP-2, MMP-9 and TIMP-2 by immunohistochemical staining. The three microcirculation patterns of endothelium-dependent vessels, mosaic vessels and vasculogenic mimicry were counted. The activity of MMP-2, MMP-9 between different groups was examined by gelatin zymography. Tumor growth in the three experimental groups was statistically significantly slower than that in the control group. The expression of MMP-2, MMP-9 and TIMP-2 in each treated group was significantly different with that in the control group. The amount of three microcirculation patterns in three experimental groups was less than that of the control group, and the amount of MV and VM in each experimental group was significantly less than that in the control group. By gelatin zymography, the enzyme activity of MMP-9, actived-MMP-2 and MMP-2/proMMP-2 in ES, DOX and ES + DOX group was lower than that in the control group, but the enzyme activity of pro-MMP-2 among the four groups was not significantly different. The combined use of doxycycline and endostatin in melanoma can inhibit the expression of MMPs, influencing the formation of different microcirculation patterns in melanoma.Zhonghua zhong liu za zhi [Chinese journal of oncology] 08/2007; 29(7):500-4. -
Article: [Roles of immunohistochemistry and detection of SYT-SSX fusion gene in diagnosis of synovial sarcoma].
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ABSTRACT: To assess the diagnostic values of immunohistochemistry and SYT-SSX fusion gene detection for synovial sarcoma. Based on clinical features, histological and immunohistochemical profiles, 195 cases of tumors were divided into three diagnostic categories: definitive synovial sarcoma, probable synovial sarcoma and possible synovial sarcoma. RT-PCR Detection of the SYT-SSX fusion gene was performed using paraffin embedded tissue samples. Comparison between RT-PCR and immunohistochemistry results was carried out and their diagnostic value was evaluated. There were 62 (31.8%) definite synovial sarcomas, 49 (25.1%) probable synovial sarcomas and 84 cases (43.1%) possible synovial sarcomas. SYT-SSX fusion gene was detected in 140 (78.2%) cases overall, including 94.7% (54/57) definite synovial sarcomas, 86.0% (37/43) probable synovial sarcomas and 62.0% (49/79) possible synovial sarcomas. In tumors in the certain and probable synovial sarcoma categories, the positive rates of epithelial membrane antigen (EMA) were significantly higher in the SYT-SSX positive cases than SYT-SSX-negative cases (P = 0.022, P = 0.010, respectively). EMA was positively correlated with the presence of SYT-SSX (r(s) = 0.431, P = 0.001, r(s) = 0.463, P = 0.002, respectively). However, such a correlation was not seen in cytokeratin (CK), vimentin or S-100 protein immunostains (P > 0.05). In tumors of possible synovial sarcoma category, there were no significant differences of CK, EMA, vimentin or S-100 protein between SYT-SSX-positive and SYT-SSX-negative tumors. SYT-SSX fusion gene detection is not needed when the conventional approaches are diagnostic. EMA positivity has a similar diagnostic value to that of SYT-SSX by RT-PCR for tumors in the probable synovial sarcoma category. However, detection of SYT-SSX is very important for diagnosis of the tumors in the category of possible synovial sarcoma.Zhonghua bing li xue za zhi Chinese journal of pathology 07/2007; 36(7):480-4. -
Article: [Study on the molecular mechanism of endostatin and doxycycline in suppressing melanoma growth].
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ABSTRACT: To investigate the molecular mechanism of endostatin and doxycycline effect on melanoma growth. A B16 melanoma mice model was established by intracutaneous injection of B16 cell suspension. The mice were treated with endostatin, doxycycline, endostatin and doxycycline respectively, the control group received no treatment. A time course study of tumor volume was performed to observe the antitumor effect. The expression of matrix metalloproteinase (MMP-9), MMP-2, TIMP-2 were examined by immunohistochemistry staining. Tumors in endostatin treatment group, doxycycline treatment group, endostatin and doxycycline treatment group grew slower than in the control group. The difference of the average tumor volume in the doxycycline group and control group, in the doxycycline with endostatin treatment group and control group were statistically different. The positive expression ratio of MMP-2, MMP-9, TIMP-2 in each treatment group were statistically different from their control groups (F = 12.79, F = 5.56, F = 4.64; P < 0.05). Doxycycline and endostatin are able to inhibit the expression of MMPs and promote expression of TIMP, which ultimately inhibits the growth of B16 melonoma.Zhonghua bing li xue za zhi Chinese journal of pathology 12/2006; 35(11):677-80. -
Article: [Correlation between matrix metalloproteinases-2 and tissue inhibitor of metalloproteinase-2 expression, metastatic potential and tumor angiogenesis in synovial sarcoma and its prognostic significance].
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ABSTRACT: To study the expression of matrix metalloproteinases (MMP)-2 and tissue inhibitor of metalloproteinase (TIMP)-2 in tumor cells of synovial sarcoma and its clinical significance. Expression of MMP-2 and TIMP-2 in tumor cells of 72 cases of synovial sarcoma was studied by immunohistochemistry. The profile was correlated with clinicopathologic parameters, microvessel density (MVD) (analyzed by CD31 immunostaining) and survival rate. (1) There was a statistically significant negative correlation between expression of MMP-2 and TIMP-2 (r = -0.290 and P = 0.013). (2) The proportion of high MMP-2 expression to low TIMP-2 expression in patients with tumor metastasis was significantly higher than that in patients without metastasis (P = 0.010 and 0.002 respectively). (3) MVD of patients with high MMP-2 expression was higher than that in the low MMP-2 expression group (P = 0.005). MVD of patients with high TIMP-2 expression was lower than that in the low TIMP-2 expression group (P = 0.048). (4) Low TIMP-2 expression significantly correlated with poor prognosis of patients with synovial sarcoma, by univariate and multivariate survival analysis (P = 0.002 and 0.016 respectively). Expression of MMP-2 and TIMP-2 correlates with metastatic potential and tumor angiogenesis in synovial sarcoma. Low TIMP-2 expression often indicates poor prognosis and unfavorable clinical outcomes.Zhonghua bing li xue za zhi Chinese journal of pathology 04/2006; 35(3):155-8. -
Article: [A study on vasculogenic mimicry in hepatocellular carcinoma].
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ABSTRACT: To explore if vasculogenic mimicry (VM) exists in hepatocellular carcinoma (HCC) and to explain the clinical significance of VM. Ninety-nine HCC resection specimens with complete clinical and prognostic data were collected. Immunohistochemical staining of CD31 and CD105, hepatocyte and PAS staining of the histological preparations were conducted to explore if VM exists in those HCC. 12.12% (12 specimens) of the 99 specimens exhibited evidence of VM. One of 40 HCC specimens (2.5%) which belong to Edmondson pathologic grade I-II exhibited VM; 11 of 59 HCC specimens which belong to Edmondson pathologic grade III-VI (18.64%) exhibited VM, the low differentiated HCC (grade III-VI) exhibited more VM specimens than the high differentiated HCC (grade I-II) (chi2=4.416, P < 0.05). The biological behavior of VM was assessed and the stages of the cancers, using the TNM (tumor, node, metastases) classification criteria, were analyzed. These parameters of the VM and non-VM groups were compared. The mean TNM stage of the VM group was not more advanced than that of the non-VM group. The hematogenous metastases ( lung, bone, peritoneum et al) between the 2 groups were compared, and in the VM group the hematogenous metastasis rate was higher (chi2=8.873, P < 0.01). Kaplan-Meier actuarial survival curves were used to compare the VM group (n = 12) with the non-VM group (n = 87). Median survival time of the VM group was 9 months and that of the non-VM group was 31 months. The VM group had a lower survival rate than the non-VM group (P < 0.01). VM exists in HCC, and the higher invasive HCCs exhibit more VM than the less invasive HCCs. The HCC patients in the VM group had a higher rate of hematogenous metastases, a lower survival rate, and a poorer prognosis.Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology 02/2006; 14(1):41-4. -
Article: [Expressions and significance of E-cadherin and beta-catenin in synovial sarcoma].
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ABSTRACT: To explore the expression and significance of E-cadherin (E-cad) and beta-catenin (beta-cat) in synovial sarcoma. Expression of E-cad and beta-cat in 72 cases of synovial sarcoma were detected by tissue microarray technique and immunohistochemistry. The relationships between E-cad and beta-cat expression and clinicopathological data and survival rate were analyzed. (1) 95.1% of dots on the tissue microarrays were observable morphologically. The background was clear and the contrast was vivid after immunohistochemistry. (2) The expression of E-cad was reduced in 56 patients (77.8%) and that of beta-cat was reduced in 51 patients (70.8%). (3) In patients with synovial sarcoma of monophasic fibrous type, grade III, and in patients with recurrence or metastasis, CK-negative and EMA-negative the rates of reduced expression of E-cad and beta-cat were significantly higher than those with primary sarcoma of biphasic type, grade II, CK-positive and EMA positive (P < 0.05 for all). (4) The survival of synovial sarcoma patients with E-cad and beta-cat expressions preserved was significantly better than those with reduced expressions (P = 0.012, P = 0.047). The expression of E-cad and beta-cat is correlated with cell differentiation. Reduced expression of E-cad and beta-cat may indicate a high potential of recurrence or metastasis and poor prognosis. Tissue microarray technique is applicable for retrospective studies of large sample size.Zhonghua zhong liu za zhi [Chinese journal of oncology] 12/2005; 27(12):727-30. -
Article: Sulindac induces apoptosis and protects against colon carcinoma in mice.
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ABSTRACT: To study the effect of sulindac on colon cancer induction in mice. The chemo-preventive action of 80 ppm sulindac fed during initiation and post-initiation and 100 ppm sulindac fed during progressive stages of induction of colon carcinogenesis in mice was investigated using 1,2-dimethylhydrazine (DMH). Using the terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) technique and PCNA immunohistochemical staining, we observed the apoptotic and proliferative cell density changes at different carcinogenic stages and the effect of sulindac on these two phenomena. Dietary sulindac significantly inhibited the incidence of colonic neoplasmas in mice. Compared with the control group, feeding sulindac during initiation and post-initiation stages inhibited the incidence by 46.7-50.4%, and feeding sulindac during progressive stages inhibited the incidence by 41.1%. Animals that were fed sulindac showed less serious pathological changes than those that were fed the control diet (P<0.01, H = 33.35). There was no difference in the density of proliferating cells among those groups which were or were not fed sulindac. In the same period, feeding sulindac resulted in a higher density of apoptotic cells than feeding control diet. Sulindac has an anti-carcinogenic function in mice. Its effect on preventing colon carcinogenesis is better than its effect on treating established tumors. By inducing apoptosis, sulindac inhibited the development of colon cancer and delayed canceration. Sulindac has no effect on proliferation. The anti-carcinogenic properties of sulindac are most effective in the moderate and severe stages of dysplasia and canceration.World Journal of Gastroenterology 06/2005; 11(18):2822-6. · 2.47 Impact Factor -
Article: [Study on vasculogenic mimicry in malignant melanoma].
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ABSTRACT: To investigate the mode of angiogenesis between highly invasive malignant melanoma and poorly invasive malignant melanoma by immunohistochemistry and periodic acid-Schiff stain (PAS) and to discuss whether the tumor cells in highly invasive malignant melanoma carry vasculogenic mimicry through self-metamorphosis, thus acquiring blood supply to sustain their growth. Thirty cases of highly invasive malignant melanoma and 30 cases of poorly invasive malignant melanoma were retrieved and reprocessed as tissue microarray for further investigations. The tissue microarray sections were then stained with CD34 and PAS; and the positivity rates were compared. There was a significant difference between CD34 and PAS staining in highly invasive malignant melanoma (P < 0.01). The difference was not statistically significant in poorly invasive malignant melanoma (P > 0.05). Vasculogenic mimicry exists in some cases of highly invasive malignant melanoma. It is possible that the tumor cells can acquire blood supply to sustain growth and metastasize via this mechanism.Zhonghua bing li xue za zhi Chinese journal of pathology 12/2003; 32(6):539-43. -
Article: [Correlation between the expression of collgen IV, VEGF and vasculogenic mimicry].
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ABSTRACT: To study the relationship between collgen (Col) IV, VEGF secreted by the tumor cells and vasculogenic mimicry (VM). 158 bi-phase differential malignant tumor specimens were alloted and made into tissue microarray. These tissue microarray sections were stained with CD31, periodic acid-Schiff (PAS) and Col IV. Subsequently, distributive trait of Col IV and the difference of VEGF expression were analyzed. The basement membrane of VM was PAS and Col IV positive. The expression of VEGF in bi-phase differential malignant tumor with VM was less than that in those without VM. The difference of VEGF expression in malignant melanoma and alveolar rhabdomyosarcoma was significant (P < 0.05). Collgen IV and periodic acid-Schiff positive material take part in constructing the basement membrane of vasculogenic mimicry. The difference of the VEGF expression proves that vasculogenic mimicry can sustain the tumor blood supply.Zhonghua zhong liu za zhi [Chinese journal of oncology] 12/2003; 25(6):524-6. -
Article: Expression of Fas and p53 in different stages of large intestinal malignant transformation and their association with apoptosis
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ABSTRACT: AIM: To explore the expression of Fas and p53 in the large intestinal adenocarcinoma, malignantly transformed adenoma, tubulo-villous adenoma, and tubular adenoma, and to assess their influence on the pathogenesis of large intestinal carcinoma.
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Institutions
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2007–2010
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Tianjin Medical University
Harbin, Heilongjiang Sheng, China
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2003–2009
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Tianjin Medical University Cancer Institute and Hospital
Tianjin, Tianjin Shi, China
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