...
首页> 外文期刊>Biomaterials >Sequential delivery of dexamethasone and VEGF to control local tissue response for carbon nanotube fluorescence based micro-capillary implantable sensors.
【24h】

Sequential delivery of dexamethasone and VEGF to control local tissue response for carbon nanotube fluorescence based micro-capillary implantable sensors.

机译:地塞米松和VEGF的顺序输送可控制基于碳纳米管荧光的微毛细管可植入传感器的局部组织反应。

获取原文
获取原文并翻译 | 示例
           

摘要

In this study, we examined the in vivo pharmacological effects of the sequential delivery of dexamethasone (DX) followed by vascular endothelial growth factor (VEGF) on the immune response and localized vascular network formation around a hydrogel-coated, micro-capillary implant for single-walled carbon nanotube based fluorescence sensors. We demonstrate, for the first time, imaging of an SWNT fluorescence device implanted subcutaneously in a rat. For tissue response studies, the chick embryo chorioallantoic membrane (CAM) was used as a tissue-model for an 8-day implantation period. The average vascular density of the tissue surrounding a hydrogel-coated microdialysis capillary sensor with simultaneous, sequential, or no delivery of DX and VEGF was 1.24+/-0.35x10(-3)vessels/microm(2), 1.15+/-0.30x10(-3)vessels/microm(2) and 0.71+/-0.20x10(-3)vessels/microm(2), respectively. Calculation of the therapeutic index (vasculature/inflammation ratio), which reflects promotion of angiogenesis versus the host immune response, demonstrates that sequential DX/VEGF delivery was 60.3% and 139.3% higher than that of VEGF and DX release alone, respectively, and was also 32.1% higher when compared to simultaneous administration, proving to be a more effective strategy in utilizing the pharmacological impact of DX and VEGF around the biosensor-model implant.
机译:在这项研究中,我们检查了地塞米松(DX)继之以血管内皮生长因子(VEGF)的顺序递送对免疫应答和水凝胶涂层微毛细血管植入物局部血管网络形成的体内药理作用壁碳纳米管的荧光传感器。我们首次展示了皮下植入大鼠的SWNT荧光装置的成像。对于组织反应研究,将鸡胚绒膜尿囊膜(CAM)用作8天植入期的组织模型。具有水凝胶涂层的微透析毛细管传感器周围,同时,顺序或无DX和VEGF递送的组织的平均血管密度为1.24 +/- 0.35x10(-3)血管/微米(2),1.15 +/- 0.30 x10(-3)容器/微米(2)和0.71 +/- 0.20x10(-3)容器/微米(2)。计算治疗指数(脉管系统/炎症比率),反映了血管生成相对于宿主免疫反应的促进,表明顺序的DX / VEGF递送分别比单独的VEGF和DX释放分别高60.3%和139.3%,并且与同时给药相比,也提高了32.1%,事实证明这是利用DX和VEGF在生物传感器模型植入物周围的药理作用的更有效策略。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号