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Cui X.,Capital Medical University | Xu Z.,Peking Union Medical College | Zhao Z.,Capital Medical University | Sui D.,Capital Medical University | And 7 more authors.
International Journal of Biological Sciences | Year: 2013

Glioblastoma multiforme (GBM) is the most common form of malignant glioma, characterized by genetic instability and unpredictable clinical behavior. GBM is marked by an extremely poor prognosis with median overall survival of 12~14 months. In this study, we detected the CD137L-expressing cells and IL-17-expressing cells in tumor tissues resected from patients with GBM. Expression of CD137L and IL-17 were assessed by immunohistochemistry, and the prognostic value of CD137L and IL-17 expression within the tumor tissues were assessed by Cox regression and Kaplan-Meier analysis. Immunohistochemical detection showed that positive cells of CD137L and IL-17 in glioblastoma tissue samples were 46.3% (19/ 41) and 73.2% (30/41) respectively. Expression of CD137L was not correlated with overall survival of GBM patients (P=0.594), while significantly longer survival rate was seen in patients with high expression of IL-17, compared to those with low expression of IL-17 (P=0.007). In addition, we also found that IL-17 expression was significantly correlated with Progression-free survival (PFS) (P=0.016) and death rate (P=0.01). Furthermore, multivariate Cox proportional hazard analyses revealed that IL-17 (P=0.018) and PFS (P=0.028) were independent factors affecting the overall survival probability. Kaplan-Meier analysis showed that PFS of high expression of IL-17 group were significantly longer (P=0.004) than low expression group with GBM. It is concluded that high levels of IL-17 expression in the tumor tissues may be a good prognostic marker for patients with GBM. © Ivyspring International Publisher.

Liu X.-J.,Peking University | Wu W.-T.,Peking University | Wu W.-H.,Peking University | Yin F.,The Navy General Hospital of PLA China | And 11 more authors.
CNS Neuroscience and Therapeutics | Year: 2013

Aims: To study the contribution of epidermal growth factor receptor variant III (EGFRvIII) to glioblastoma multiforme (GBM) stemness and gefitinib resistance. Methods: CD133+ and CD133- cells were separated from EGFRvIII+ clinical specimens of three patients with newly diagnosed GBM. Then, RT-PCR was performed to evaluate EGFRvIII and EGFR expression in CD133+ and CD133- cells. The tumorigenicity and stemness of CD133+ cells was verified by intracranial implantation of 5 × 103 cells into immunodeficient NOD/SCID mice. Finally, cells were evaluated for their sensitivity to EGFR tyrosine kinase inhibition by gefitinib. Results: RT-PCR results showed that the sorted CD133+ cells expressed EGFRvIII exclusively, while the CD133- cells expressed both EGFRvIII and EGFR. At 6-8 weeks postimplantation, CD133+/EGFRvIII+/EGFR- cells formed intracranial tumors. Cell counting kit-8 results showed that the IC50 values of the three isolated EGFRvIII+ cell lines treated with gefitinib were 14.44, 16.00, and 14.66 μM, respectively, whereas the IC50 value of an isolated EGFRvIII- cell line was 8.57 μM. Conclusions: EGFRvIII contributes to the stemness of cancer stem cells through coexpression with CD133 in GBMs. Furthermore, CD133+/EGFRvIII+/EGFR- cells have the ability to initiate tumor formation and may contribute to gefitinib resistance. © 2013 John Wiley & Sons Ltd.

Ma F.,Fudan University | Xiao Z.,CAS Institute of Genetics and Developmental Biology | Meng D.,CAS Institute of Genetics and Developmental Biology | Hou X.,CAS Institute of Genetics and Developmental Biology | And 3 more authors.
International Journal of Molecular Sciences | Year: 2014

The search for effective strategies for peripheral nerve regeneration has attracted much attention in recent years. In this study, ordered collagen fibers were used as intraluminal fibers after nerve injury in rats. Vascular endothelial growth factor (VEGF) plays an important role in nerve regeneration, but its very fast initial burst of activity within a short time has largely limited its clinical use. For the stable binding of VEGF to ordered collagen fibers, we fused a collagen-binding domain (CBD) to VEGF through recombinant DNA technology. Then, we filled the ordered collagen fibers-CBD-VEGF targeting delivery system in a collagen tube to construct natural neural scaffolds, which were then used to bridge transected nerve stumps in a rat sciatic nerve transection model. After transplantation, the natural neural scaffolds showed minimal foreign body reactions and good integration into the host tissue. Oriented collagen fibers in the collagen tube could guide regenerating axons in an oriented manner to the distal, degenerating nerve segment, maximizing the chance of target reinnervation. Functional and histological analyses indicated that the recovery of nerve function in the natural neural scaffolds-treated group was superior to the other grafted groups. The guiding of oriented axonal regeneration and effective delivery systems surmounting the otherwise rapid and short-lived diffusion of growth factors in body fluids are two important strategies in promoting peripheral nerve regeneration. The natural neural scaffolds described take advantage of these two aspects and may produce synergistic effects. These properties qualified the artificial nerve conduits as a putative candidate system for the fabrication of peripheral nerve reconstruction devices. © 2014 by the authors; licensee MDPI, Basel, Switzerland.

Qin J.-Z.,The Affiliated Bayi Brain Hospital | Qin J.-Z.,Neurosurgical Institution of Beijing Military Region PLA | Wu Y.-K.,The Affiliated Bayi Brain Hospital | Wu Y.-K.,Neurosurgical Institution of Beijing Military Region PLA | And 10 more authors.
Experimental and Therapeutic Medicine | Year: 2016

A 62-year-old male suffering from vomiting and mild preceding nausea for 15 days was examined in the present case report. Magnetic resonance imaging revealed a homogeneously enhancing cluster‑like lesion involving the lateral, third and fourth ventricles. An endoscopic biopsy was performed, and histopathological examination led to the diagnosis of a high‑grade diffuse large B‑cell lymphoma. To the best of our knowledge, the present study reports the first case of a primary lymphoma involving the entire ventricular system. Therefore, primary lymphomas should be considered in the list of ventricular tumors. An endoscopic biopsy requires minimal invasion to obtain an adequate tissue sample, and frequently leads to the correct diagnosis and subsequent treatment protocols. © 2016, Spandidos Publications. All rights reserved.

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