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Slowdown intracranial glioma progression by optical hyperthermia therapy: study on a CT-2A mouse astrocytoma model

机译:通过光学热疗治疗减缓颅内神经胶质瘤进展:CT-2A小鼠星形细胞瘤模型的研究

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Metallic nanorods are promising agents for a wide range of biomedical applications. We report an optical hyperthermia method capable of inducing slowdown tumor progression of an experimental in vivo CT-2A glioblastoma tumor. The tumor model used in this research is based on the transplantation of mouse astrocytoma CT-2A cells in the striatum of mice by intracranial stereotaxic surgery. Two weeks after cell implant, the resulting tumor is treated by irradiating intratumoral injected gold nanorods, biofunctionalized with CD133 antibody (B-GNRs), using a continuous wave laser. Nanoparticles convert the absorbed light into localized heat (reaching up to 44 degrees C) due to the effect of surface plasmon resonance. A significant slowdown in CT-2A tumor progression is evident, by histology and magnetic resonance imaging, at one (p = 0.03) and two weeks (p = 0.008) after irradiation treatment. A notable deceleration in tumor size (15%-75%) as compared to the control untreated groups, it is observed. Thus, laser irradiation of B-GNRs is found to be effective for the treatment of CT-2A tumor progression. Similarities between the pre-clinical CT-2A tumor model and the human astrocytoma disease, in terms of anatomy, metastatic behavior and histopathology, suggest that hyperthermic treatment by laser irradiation of B-GNRs administered into high-grade human astrocytoma might constitute a promising alternative treatment to limit the progression of this deadly disease.
机译:金属纳米棒是有希望的代理商广泛的生物医学应用。我们报告能够诱导体内CT-2A成胶质细胞瘤肿瘤的实验的减速肿瘤进展的光学热疗方法。在此研究中使用的肿瘤模型是基于小鼠星形细胞瘤CT-2A细胞的小鼠颅内手术立体纹状体上的移植。细胞植入后两周,将得到的肿瘤被照射肿瘤内注射金纳米棒,与CD133抗体(B-的GNR)生物官能化,使用连续波激光治疗。纳米颗粒所吸收的光转换成局部热量(达到高达44℃),由于表面等离子体共振的效果。在CT-2A肿瘤进展甲显著放缓在一个(p值= 0.03)和两个周(P = 0.008)照射处理后是显而易见的,通过组织学和磁共振成像。在肿瘤大小(15%-75%)相比于对照组未处理的作为一个显着的减速,可以观察到。因此,B-的GNR的激光照射被发现是有效的CT-2A肿瘤进展的治疗。临床前CT-2A肿瘤模型和人星形细胞瘤疾病,解剖,转移行为和组织病理学的术语之间的相似性,表明通过施用到高档人星形细胞瘤B-的GNR的激光照射温热治疗可能构成有前途的替代治疗以限制这种致命疾病的进展。

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