Zhi-Yong Wang

Sichuan University, Chengdu, Sichuan Sheng, China

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Publications (7)0.24 Total impact

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    ABSTRACT: We sought to investigate the role and diagnostic value of microRNA 155 (miR-155) in OSCC patients. Using real-time quantitative polymerase chain reaction analysis, miR-155 expression levels were assessed in OSCC cell lines and a cancerous HB cell line. The correlation between miR-155 expression level and clinical parameters was analyzed in 46 patients with OSCC. In addition, the effects of miR-155 on OSCC cell proliferation were evaluated by modulating its expression using an miR-155 mimic and antisense miR-155. Significant upregulation of miR-155 was found in OSCC cell lines and in tissues of patients with OSCC. The receiver operator characteristic analysis indicated fair-to-good predictability. Overexpression of miR-155 correlated with the histologic grade (P = .033), and the upregulation of miR-155 enhanced OSCC cell proliferation. In OSSC, upregulation of miR-155 correlated with the histologic grade and can be used as a potential prognostic biomarker.
    Oral surgery, oral medicine, oral pathology and oral radiology. 02/2014; 117(2):227-33.
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    ABSTRACT: Purpose We sought to investigate the distribution and clinical outcomes of tumor-infiltrating CD208+ mature dendritic cells (mDCs) in OSCC patients. Materials and methods Using immunohistochemical analysis, the distribution of CD208+ mDCs in adjacent non-neoplastic tissues (NT) and tumor tissue including tumor stroma (TS) and tumor nest (TN) of 79 OSCC patients were evaluated. The analysis was quantitative, and the number of positive cells was counted in 5 microscopic high-power fields (400×). At gene expression level, CD208 expression was also assessed by q-PCR. Kaplan Meier analyses were used to analyze the prognostic value of tumor infiltrating CD208+ mDCs. Results The number of tumor infiltrating CD208+ mDCs was higher in TS and TN than in NT (P<0.0001) and the number of CD208+ mDCs in TS was higher in lymph node positive OSCC patients (P<0.05). At gene expression level, CD208 was also upregulated in lymph node positive patients (P<0.05). The number of infiltrating CD208+ mDCs was not associated with patient's survival time. Conclusions The number of tumor infiltrating CD208+ mDCs in TS was higher in lymph node positive OSCC patients, but the accumulation of CD208+ mDCs does not correlate with survival time in oral squamous cell carcinoma patients.
    Journal of Oral and Maxillofacial Surgery. 01/2014;
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    ABSTRACT: Vascular endothelial growth factor (VEGF) is a tumor angiogenesis factor that is important in immune regulation. In our previous study, we found that VEGF expression in the peripheral blood and neoplasm nest from patients with oral squamous cell carcinoma (OSCC) was positively correlated with the course of disease, while an inverse correlation between VEGF expression and dendritic cells (DCs) was identified in the peripheral blood. Therefore, in the present study, we investigated whether inhibition of human VEGF in the human tongue carcinoma cell line Tca8113 had effects on the activity of monocyte-derived DCs. We knocked down the expression of human VEGF in Tca8113 cells using the small interfering RNA (siRNA) technique. Tca8113 cells pre-transfected with siRNA targeting VEGF were co-cultured with monocyte‑derived immature and mature DCs. Cell proliferation was evaluated by a WST-8 assay. Cell apoptosis, cell cycle and cell phenotypes were determined by flow cytometry. The data revealed that downregulation of the human VEGF significantly inhibited the proliferation of Tca8113 cells and increased apoptosis. Inhibition of human VEGF arrested the cell cycle of Tca8113 cells at the G0/G1 phase. Our results showed that the co-culture of DCs with Tca8113 cells markedly inhibited the expression of the mature markers of DCs including HLA-DR, CD80, CD86, CD40 and CD1a, as well as the immature marker CD83, while inhibition of human VEGF in Tca8113 cells significantly reversed these effects. Therefore, human VEGF in Tca8113 cells may not only regulate the cell proliferation and apoptosis of oral squamous cell carcinoma cells, but may also inhibit DC maturation.
    Oncology letters 04/2012; 3(4):885-892. · 0.24 Impact Factor
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    ABSTRACT: To assess the clinical features and therapeutic efficacy of anterolateral thigh (ALT) flaps for the intraoral defects reconstruction. The clinicopathologic data of 67 cases with oral tumors were obtained from School of Stomatology, Nanjing University Medical Center from Dec. 2008 to Dec. 2010. All the patients underwent the simultaneous tumor resection and intraoral defects reconstruction with free anterolateral thigh flaps. The defects included the tongue, buccal, gingival, mouth floor, and so on. The descending branch of lateral femoral circumflex artery was anastomosed to the external maxillary artery or superior thyroid artery; the vein was anastomosed to the common facial vein or external jugular vein. The flaps were divided into three types: musculocutaneous ALT flap, fasciocutaneous ALT flap and thinned ALT flap. There were 38 male patients and 29 female. The anterolateral thigh flaps included 35 musculocutaneous flaps, 17 fasciocutaneous flaps and 15 thinned flaps. The success rate was 98.5% (66/67). Partial necrosis happened in one case with diabete, which healed after debridement and dressing. 1 flap was totally necrosis. Double venous anastomosis was performed in 41 flaps, and one venous anastomosis was performed in 26 flaps. 8 patients required operative exploration in the perioperative period including 6 flaps with thrombotic events (5 flaps were complete survival after the salvages, and 1 flap was failure) , 1 flap with hematoma, and 1 flap with twisting of perforator. The follow-up period ranged from 2 to 24 months( mean, 8.7 months). The result was satisfied. The donor sites were closed directly in all patients, and the wounds healed uneventfully. The free anterolateral thigh flap is an ideal soft tissue flap for the intraoral defects reconstruction with good functional result at recipient area and less morbidity at the donor site.
    Zhonghua zheng xing wai ke za zhi = Zhonghua zhengxing waike zazhi = Chinese journal of plastic surgery 09/2011; 27(5):323-6.
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    ABSTRACT: To investigate the effect of vascular endothelial growth factor (VEGF) on the differentiation, formation and function of the dendritic cell (DC) in peripheral blood of patients with oral squamous cell carcinoma (OSCC). Flow cytometry was used to detect the number of DC in peripheral blood of 81 patients with OSCC, and ELISA applied to test serum VEGF concentration the OSCC patients, and immunohistochemistry used to observe the expression of VEGF in primary foci of 57 patients with OSCC. DC from CD-14 peripheral blood mononuclear cells were cultured with VEGF(165) in vitro to investigate the cytokine's effect on DC. In comparison with controls [(325.70 +/- 117.54) ng/L], the level of serum VEGF [(764.33 +/- 263.64) ng/L] was significantly increased (P < 0.01) and the DC numbers was significantly decreased (P < 0.01) in patients with OSCC. There was a negative correlation between serum VEGF concentration and the level of DC (P < 0.01). The expression of VEGF in primary focus was positively correlated with serum VEGF concentration, but was negatively correlated with the level of peripheral blood DC (P < 0.01). DC cultured in vitro with VEGF(165) decreased the expression of CD-1a, CD-40, CD-80, CD-86, CD-83, HLA-DR, and revealed a lower ability of stimulating T lymphocyte proliferation but a higher ability of uptake, compared to controls. The overexpressed VEGF in patients with OSCC might be one of the important reasons for blocking the differentiation and maturation of DC.
    Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology 04/2009; 44(3):135-9.
  • Wei Han, Qin-gang Hu, Zhi-yong Wang
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    ABSTRACT: To investigate the inhibitory effect of dendritic cells (DCs) on the growth of the implanted tongue squamous cell carcinoma (SCC) tumors in nude mice. Being induced from human peripheral blood monocytes (PBMCs) with rhGM-CSF, rhIL-4 and rhTNF-alpha, DCs were pulsed by Tca8113 cells lysates. Those DCs and T lymphocytes were co-cultured to induce specific cytotoxic T lymphocytes (CTLs). Immunotherapy was then performed after those DCs and CTLs were implanted into the tumor-bearing nude mice. DCs were induced from PBMCs with multiple cytokines. Compared with the control groups, the growth of tumors was significantly inhibited in the group that had been implanted with DCs and CTLs, and tumor doubling time also increased markedly (P < 0.05). DCs function normally after being induced from human PBMCs with multiple cytokines; DCs pulsed with tumor cell lysates and CTLs co-cultured with those DCs have a significant anti-tumor immune activity in nude mice.
    Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology 03/2006; 41(2):81-4.
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    ABSTRACT: To elucidate the functional status of dendritic cells (DC) in the tissue of oral squamous cell carcinoma by analyzing characteristic phenotype of them. 34 specimens from oral squamous cell carcinoma cases primarily treated with surgery were selected as test group. In addition, 30 specimens of normal mucosa from oral mucocele cases were used as control. Distribution of DC expressing CD1a+, HLA-DR+ and CD83+ in tumor tissue and normal mucous membrane was observed by immunohistochemistry. The number of DC expressing the antigens, which represented the density of DC infiltrating into tissue, was counted by microscope. The density of DC and the rate of DC expressing HLA-DR in oral carcinoma group and control were statistically compared. There was no CD83+ DC in all cases, but CD1a+ DC was found in all samples. The density of CD1a+ DC in tumor tissue was significantly lower than that in normal mucous membrane (P < 0.05). HLA-DR antigen expressed on the surface of DC in tumoral epithelium of 27-case carcinoma specimens and in normal mucous epithelium of 23 cases. The rate of HLA-DR positive expression of TIDC had no statistic significance between the two groups. The lower density of DC infiltrating in tumor tissue might reflect the microenviromental immunodeficiency of hosts with oral squamous cell carcinoma, and the functional mature of DC might be inhibited by the immunosuppressive action of oral squamous cell carcinoma.
    Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 04/2004; 22(2):103-5, 131.