摘要
目的 研究硅纳米颗粒跨越血前列腺屏障的生物学特性。 方法 化学方法制备硅纳米颗粒。加入HT10 80细胞培养转化 4 8h后观察纳米粒进入细胞内的分布情况。小白鼠 12 0只 ,按一定的浓度梯度 (0 .0 0 5、0 .0 10、0 .0 15、0 .0 2 0、0 .0 2 5ml/g)腹腔或尾静脉注射硅纳米悬液每组 2 0只 ;另 2 0只作对照。 96h后每实验组随机处死 10只 ,电镜下观察硅纳米在细胞及前列腺组织的分布 ;观察动物 2周内的毒性反应及死亡情况。 结果 电镜观察证实硅纳米颗粒进入HT10 80细胞内。注射硅纳米悬液的小白鼠前列腺细胞及间质细胞内均可见到硅纳米颗粒 ,细胞内超微结构及细胞核无明显改变 ;各实验组小白鼠体重、饮食、排便及活动情况与对照组相比均未见明显异常。 结论 硅纳米颗粒可跨越血前列腺屏障和细胞生物膜屏障 ,可能成为前列腺疾病治疗一种很有应用前景的给药载体。
Objective To study the biological behavior of silicon nanoparticles in penetrating the blood-prostate barrier. Methods Silicon nanoparticles were prepared by means of chemical procedures.The silicon nanoparticles were added into HT1080 cells and cultured for 48 h to observe the distribution of nanoparticles in the cells.The nanosuspension at gradient concentration (0.005,0.010,0.015,0.020,0.025 ml/g)was injected into 100 mice (20 mice of each group) intraperitoneally or via tail vein to study the distribution of nanoparticles in the prostate.Additional 20 mice served as controls.The mortality and toxic reaction at 2 weeks after injection were also recorded. Results Electronic microscopy confirmed the penetration of silicon nanoparticles into HT1080 cells,the prostate gland and interstitial tissue,with intracellular ultrastructure intact.There was no significant difference in body weight,diet,defecation and activities among the 5 treatment groups and control group. Conclusions Silicon nanoparticles can overcome the obstruction of drug transportation by blood-prostate barrier or other biomembranes and thus may be promising as a drug carrier in treatment of prostate diseases.
出处
《中华泌尿外科杂志》
CAS
CSCD
北大核心
2004年第5期340-342,共3页
Chinese Journal of Urology
基金
国家高技术研究发展计划 (863 )项目(2 0 0 1AA2 180 3 10 7)
