Department of Anatomy and Physiology, 228 Coles Hall, Kansas State University, Manhattan, Kansas 66506, USA.
ACS Nano. 2010 Dec 28;4(12):7093-104. doi: 10.1021/nn100870z. Epub 2010 Nov 8.
Localized magnetic hyperthermia as a treatment modality for cancer has generated renewed interest, particularly if it can be targeted to the tumor site. We examined whether tumor-tropic neural progenitor cells (NPCs) could be utilized as cell delivery vehicles for achieving preferential accumulation of core/shell iron/iron oxide magnetic nanoparticles (MNPs) within a mouse model of melanoma. We developed aminosiloxane-porphyrin functionalized MNPs, evaluated cell viability and loading efficiency, and transplanted neural progenitor cells loaded with this cargo into mice with melanoma. NPCs were efficiently loaded with core/shell Fe/Fe(3)O(4) MNPs with minimal cytotoxicity; the MNPs accumulated as aggregates in the cytosol. The NPCs loaded with MNPs could travel to subcutaneous melanomas, and after A/C (alternating current) magnetic field (AMF) exposure, the targeted delivery of MNPs by the cells resulted in a measurable regression of the tumors. The tumor attenuation was significant (p < 0.05) a short time (24 h) after the last of three AMF exposures.
局部磁热疗作为癌症的一种治疗方式重新引起了人们的兴趣,尤其是如果它可以靶向肿瘤部位。我们研究了是否可以利用肿瘤趋向性神经祖细胞(NPC)作为细胞输送载体,以便在黑色素瘤小鼠模型中实现核心/壳铁/氧化铁磁性纳米颗粒(MNP)的优先积累。我们开发了氨基硅氧烷-卟啉功能化的 MNP,评估了细胞活力和负载效率,并将负载这种货物的神经祖细胞移植到患有黑色素瘤的小鼠中。NPC 可以有效地负载具有最小细胞毒性的核/壳 Fe/Fe3O4 MNP;MNP 在细胞质中聚集。负载 MNP 的 NPC 可以迁移到皮下黑色素瘤中,并且在施加 A/C(交流电)磁场(AMF)后,细胞的靶向递送导致肿瘤的可测量消退。在三次 AMF 暴露中的最后一次之后的短时间内(24 小时),肿瘤衰减是显著的(p<0.05)。