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Huang Z.-B.,Sichuan University | Yin G.-F.,Sichuan University | Liao X.-M.,Sichuan University | Gu J.-W.,PLA General Hospital of Chengdu Military Region
Frontiers of Materials Science | Year: 2014

Polypyrrole (PPy), the earliest prepared conducting polymer, has good biocompatibility, easy synthesis and flexibility in processing. Compared with metal and inorganic materials, doped PPy has better mechanical match with live tissue, resulting in its many applications in biomedical field. This mini-review presents some information on specific PPy properties for tissue engineering applications, including its synthesis, doping, bio-modification. Although some challenges and unanswered problems still remain, PPy as novel biomaterial has promoted the development tissue engineering for its clinical application in the future. © 2014 Higher Education Press and Springer-Verlag Berlin Heidelberg. Source


Ding X.,PLA General Hospital of Chengdu Military Region
Journal of Thoracic Disease | Year: 2011

Even though benign tracheobronchial tumors are quite rare, they still can induce airway obstruction, result in suffocation, and need emergent management to remove the obstructing lesions and make the respiratory tracts unobstructed. Although the preferred therapy is surgery, it is still difficult to deal with the tumors in some cases, and the complications of surgery are common. Therefore, bronchoscopic managements, such as Nd: YAG laser, electrocautery, APC and Cryotherapy, are very important to treat benign tracheobronchial tumors and can cure most of them. The efficacy of therapeutic endoscopy for the treatment of patients with benign airways obstruction has been established. However, in order to maximally eradicate the benign tumors with minimal damage to patients, the success of bronchoscopic managements for the treatment strongly depends on the diligent identification of the various factors, including the location, size, shape of tumor, and the age, status, cardio respiratory function of patients, and full comprehension of the limits and potential of each particular technique. Because the advantages and disadvantages of above mentioned interventional methods, single method can not solve all clinical issues. Therefore, in order to remove benign tracheobronchial tumors completely, and reduce the incidence of recurrence as far as possible, many doctors combine several methods of them to treat complicated benign tracheobronchial tumors. This article reviews the core principles and techniques available to the bronchoscope managing benign tracheobronchial tumors. © 2011 Pioneer Bioscience Publishing Company. Source


Jian C.-X.,Chongqing Medical University | Yang M.-Z.,Chongqing Medical University | Li P.,Chongqing Medical University | Xiong J.,Chongqing Medical University | And 6 more authors.
Cancer Investigation | Year: 2012

IFN regulatory factor 4 binding protein (IBP) has been shown to play an important role in the progression of malignant tumors such as breast cancer cells, but its function in oral squamous cell carcinoma (OSCC) remains unclear. We found that IBP ectopically expressed in some OSCC specimens but not in normal oral mucosa epithelium tissues. IBP expression was significantly correlated with tumor size, differentiation, clinical stage, and distant metastasis. Furthermore, IBP markedly promoted OSCC cell proliferation, shortened the G1 interval in the cell cycle, and increased cyclin D1 expression. These findings suggest that IBP may be a potential therapeutic target for OSCC. © 2012 Informa Healthcare USA, Inc. Source


Liu X.-C.,Chinese Peoples Liberation Army | Jian C.-X.,PLA General Hospital of Chengdu Military Region | Li C.-J.,PLA General Hospital of Chengdu Military Region | He S.-Z.,Chinese Peoples Liberation Army
Inflammation | Year: 2012

Age-related macular degeneration (AMD) is the predominant cause of irreversible blindness in the elderly population. Despite intensive basic and clinical research, its pathogenesis remains unclear. However, evidence suggests that immunological and inflammatory factors contribute to the pathogenesis of AMD. A newly identified cytokine, IL-33, appears to be an important pro-inflammatory cytokine promoting tissue inflammation. In this study, IL-33 was increased through amyloid-beta 1-40 (Aβ 1-40) stimulation and regulated inflammatory cytokines including IL-6, IL-8, IL-1β, and TNF-α secretion using different signaling pathways in retinal pigment epithelium (RPE) cells. Furthermore, ST2L, the important component of the IL-33 receptor, was significantly increased following recombinant human IL-33 stimulation in RPE cells. These findings suggest that IL-33-mediated inflammatory responses in RPE cells are involved in the pathogenesis of AMD. Greater understanding of the inflammatory effect of IL-33 and its role in RPE cells should aid the development of future clinical therapeutics and enable novel pharmacological approaches towards the prevention of AMD. © 2011 Springer Science+Business Media, LLC. Source


Du M.,PLA General Hospital of Chengdu Military Region | Su X.-M.,PLA General Hospital of Chengdu Military Region | Zhang T.,PLA General Hospital of Chengdu Military Region | Xing Y.-J.,Affiliated Stomatological Hospital
Molecular Medicine Reports | Year: 2014

Bone morphogenetic protein 2 (BMP2) is a growth factor that is involved in the development and progression of various types of cancer. However, the epigenetic regulation of the expression of BMP2 and the association between BMP2 expression and drug resistance in breast cancer remains to be elucidated. The present study reported that the expression of BMP2 was significantly decreased in primary breast cancer samples and the MCF-7/ADR breast cancer mulitdrug resistance cell line, which was closely associated with its promoter DNA methylation status. The expression of BMP2 in MCF-7/ADR cells markedly increased when treated with 5-Aza-2′-deoxycytidine. Knockdown of BMP2 by specific small interfering RNA enhanced the chemoresistance of the MCF-7 breast cancer cell line. These findings indicated that epigenetic silencing of BMP2 in breast cancer may be involved in breast cancer progression and drug resistance, and provided a novel prognostic marker and therapeutic strategy for breast cancer. Source

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