一种用于细胞标记和磁共振成像应用的新一类宏环兰化物复合物
Quan Zheng1, Houquan Dai, Matthew E Merritt
1Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, USA.
Journal of the American Chemical Society
|November 17, 2005
概括
新的宏环兰化物合物有效标记细胞用于生物医学成像. 这些药物可以在体外和体内进行非侵入性细胞跟踪和磁共振成像 (MRI) 应用.
科学领域:
- 生物化学 生物化学
- 生物医学成像技术 生物医学成像技术
- 细胞生物学 细胞生物学
背景情况:
- 兰化物复合物对于生物化学研究和生物医学成像至关重要.
- 开发用于细胞标记和磁共振成像 (MRI) 的新药是一种活跃的研究领域.
研究的目的:
- 设计和合成用于细胞标记和MRI的新型宏环兰化物合物.
- 评估这些新药物的有效性和细胞吸收机制.
- 为了证明它们在追踪标记细胞中的应用 in vivo.
主要方法:
- 脂友性加多 (Gd3+) 复合物的合成 (Gd/DTPA-PDA-C(n),n=10,12).
- 培养哺乳动物细胞和原始细胞 (胰腺小岛) 的细胞标签.
- 扩散增强光共振能量转移 (DEFRET) 来研究细胞吸收机制.
- 在体内MRI追踪在裸体小鼠中植入的标记胰岛素分泌β细胞.
主要成果:
- 脂性Gd3+复合体在低微分子度下有效标记培养细胞和初级细胞.
- 被标记的细胞在T1加权的MRI图像中表现出信号强度增加,形态和增殖正常.
- 德弗雷特实验表明,复合物通过疏水性基链插入细胞膜.
- 在体内MRI成功地追踪了被封装的,标记的贝塔细胞在小鼠中长达两周.
结论:
- 宏环兰化物合物 (Ln/DTPA-PDA-C(n)) 对于非侵入性细胞标记和MRI有效.
- 该机制涉及水性插入细胞膜,化剂面向细胞外.
- 这些药物有望在未来的应用中跟踪细胞运动和生物系统中的定位.
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