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Quanzhou, China

Wang Y.,Capital Medical University | Mo L.,180th Hospital of PLA | Wei W.,Capital Medical University | Shi X.,Capital Medical University
International Journal of Nanomedicine | Year: 2013

Human uveal melanoma is the most common primary intraocular tumor, and brachytherapy is one of the most common and effective treatment strategies. In order to find a safer and more effective way to increase the radio sensitivity of the tumor, we tried to use the dendrimer nanoparticle performing coexpression gene radiotherapy. In this study, we constructed recombinant DNA plasmids (early growth response-1 tumor necrosis factor-α [pEgr1-TNFα], pEgr1 thymidine kinase [TK], and pEgr1-TNFα -TK) according to the Egr1 promoter sequence. The sequences of human TNFα and herpes simplex virus (HSV) TK that were published by GenBank. Agarose gel electrophoresis and DNA sequencing had proven that we constructed the double-gene recombined plasmids pEgr1-TNF-TK correctly, as well as the plasmids pEgr1-TNFα and pEgr1-TK. The dendrimer nanoparticles combined with plasmid DNA as dendriplexes were verified with agarose gel electrophoresis and observed by transmission electron microscopy (TEM) and scanning electron microscopy to define size and shape. Zeta potential was measured using a Zetasizer analyzer. Optimal size and neutral zeta-potential characteristics of dendriplexes were achieved for the transfection studies. DNase I examination proved that the dendriplexes could protect plasmid DNA for at least 6 hours. The recombinant plasmids were transfected with dendrimer nanoparticles into the human choroidal melanoma OCM-1 cell line, followed by exposure to iodine-125 (125I) after transfection. After transfection with dendrimer nanoparticles and the irradiation of 125I, the gene expressions of TNFα and HSV1-TK were significantly increased at the protein level by enzyme-linked immunosorbent assay and Western blot analysis in OCM-1 cells. The cellular morphology of OCM-1 cells altering was observed by TEM, and a decrease in cell proliferation was revealed in cell-growth curves. Flow cytometry of annexin V/propidium iodide double-dyeing apoptosis and caspase-3 fluorescence staining showed that this treatment method could turn transfected OCM-1 cells into apoptosis and necrosis by the effects of the gene expression. This study indicated that the dendrimer nanoparticles with coexpression of TNF-α and HSV1-TK gene therapy are effective and safe and can provide us with a novel strategy to treat human uveal melanoma in the future. © 2013 Wang et al. Source

Guan D.-G.,180th Hospital of PLA | Chen H.-M.,180th Hospital of PLA | Liao S.-F.,180th Hospital of PLA | Zhao T.-Z.,PLA Fourth Military Medical University
Molecular Medicine Reports | Year: 2015

Malignant gliomas, which comprise the most common type of primary malignant brain tumor, are associated with a poor prognosis and quality of life. Paclitaxel (Taxol) and temozolomide (TMZ) are Food and Drug Administration-approved anticancer agents, which are known to have therapeutic applications in various malignancies. However, similar to other chemotherapeutic agents, the development of resistance to TMZ and Taxol is common. The aim of the present study was to investigate the regulation of glucose metabolism by TMZ and Taxol in glioma cells. The results demonstrated that glioma cells exhibit decreased glucose uptake and lactate production in response to treatment with TMZ; however, glucose metabolism was increased in response to Taxol treatment. Following analysis of TMZ- and Taxol-resistant cell lines, it was reported that glucose metabolism was decreased in the TMZ-resistant cells, but was increased in the Taxol-resistant cells. Notably, a combination of TMZ and Taxol exerted synergistic inhibitory effects on Taxol-resistant glioma cells. However, the synergistic phenotype was not observed following treatment with a combination of 5-fluorouracil and Taxol. Furthermore, restoration of glucose metabolism by overexpression of glucose transporter 1 in Taxol-resistant cells resulted in regained resistance to Taxol. Therefore, the present study proposes a novel mechanism accounting for the synergistic effects of Taxol and TMZ co-treatment, which may contribute to the development of therapeutic strategies for overcoming chemoresistance in patients with cancer. Source

Fan J.,180th Hospital of PLA | Wang M.,180th Hospital of PLA | Zhong F.,180th Hospital of PLA
BioMed Research International | Year: 2016

In our retrospective study we evaluated the efficacy of an improved amniotic membrane (AM) roll-in filling technique (AMR) combined with multilayer amniotic membrane cover to treat corneal perforation and included 46 cornea perforations ≤ 3 mm in diameter treated with AMR and 20% C3F8 mixed gas filling of the anterior chamber. Anterior chamber depth, aqueous leakage, bubble maintenance time, and cornea morphology were monitored after each operation. The mean diameter of corneal perforation was 1.60 ± 0.55 mm (range 0.5-3) and the success rate of the AMR method for corneal perforation reconstruction was 100% after a single operation. Anterior chamber depth was normally reconstructed without AMR break-off, aqueous leak, or other complications. The mean time of the C3F8 gas bubble in the anterior chamber was 8.6 ± 2.0 days (range 4-12). At the last follow-up, all patients' visual acuity was improved to varying degrees. The mean follow-up time was 11.0 ± 5.6 months (range 3-36). The AMR plugging combined with multilayer AM cover is a secure and easy intervention, which led to 100% success in our study. Various perforations ranging from trauma to infection can be treated with AMR, which is especially practical in those countries where donor cornea availability is limited. © 2016 Junhua Fan et al. Source

Zhou J.-H.,180th Hospital of PLA | Ren C.-Q.,180th Hospital of PLA
Journal of Cranio-Maxillofacial Surgery | Year: 2013

Introduction: We report functional and clinical outcomes following use of a preauricular long-corniform incision for open reduction and internal fixation (ORIF) of mandibular condylar fractures. Materials and methods: Patients with mandibular condylar fractures who underwent ORIF via a 120 preauricular long-corniform incision were included in the study. A total of 78 patients (100 condyles) were included. Follow-up occurred 10 days and 1-6 months after surgery, and included assessments of clinical, functional outcome, complications, and bone fusion. Results: There were 38 high neck, 26 low base, and 35 diacapitular condylar fractures. All measures of functional outcome significantly improved over time after surgery regardless of fracture type (all P < 0.001). The vast majority of patients in all fracture type groups had good occlusion (≥88.5%), no pain (≥89.5%), and anatomical reduction 10 days after surgery (≥81.6%). Fracture healing was complete in all patients after 6 months. There were no long-term complications and all patients were satisfied with their postoperative appearance. Conclusions: Our findings suggest that a preauricular long-corniform incision provides a good visual field during surgery, and allows for effective ORIF of mandibular high neck, low base, and diacapitular condylar fractures, with positive outcomes and minimal postoperative complications. © 2012 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved. Source

Hong Q.,180th Hospital of PLA | Fang J.,180th Hospital of PLA | Pang Y.,180th Hospital of PLA | Zheng J.,180th Hospital of PLA
Medical Oncology | Year: 2014

The aim of this study was to facilitate and deepen the understanding of the associations of the microRNA-29 (miR-29) family with tumor progression and patients' prognosis of primary osteosarcoma. We examined expression levels of miR-29a, miR-29b, and miR-29c in tumor tissues and patients' sera of 80 cases of primary osteosarcomas by quantitative real-time reverse transcriptase- polymerase chain reaction. The correlations of their serum levels with clinicopathological characteristics and patient prognosis were also analyzed. The expression levels of miR-29a, miR-29b, and miR-29c in osteosarcoma tissues and patients' sera were all significantly higher than those in normal controls (all P < 0.05). The serum levels of miR-29a and miR-29b in the patients with higher tumor grade (both P = 0.01), positive metastasis (both P = 0.006), and positive recurrence (both P = 0.006) were both markedly higher than those with lower tumor grade, negative metastasis, and negative recurrence. According to the survival analysis of 80 osteosarcoma patients, cases in the miR-29a-high and miR- 29b-high-expression groups both showed shorter overall survival (OS, both P < 0.001) and disease-free survival (DFS, both P < 0.001). Furthermore, the serum levels of miR-29a and miR-29b were both independent prognostic factors for OS and DFS of osteosarcoma patients. However, high miR-29c level was not related to any clinicopathological characteristics and patient prognosis of osteosarcomas (P > 0.05). The findings from the present study reveal that the miR-29 family may play crucial roles in the development and progression of human osteosarcoma. In particular, the serum levels of miR-29a and miR-29b may well estimate the prognosis of patients with this malignancy. © Springer Science+Business Media 2014. Source

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