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新型肿瘤凋亡显像PET探针的制备与表征 被引量:1

Preparation and characterization of novel PET molecular probe for detecting tumor apoptosis
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摘要 设计合成一种可检测肿瘤凋亡的新型正电子发射断层显像(PET)探针,并对其理化性质和生物学性质进行研究。采用"点击化学"反应将标记基团和含天门冬氨酸-谷氨酸-缬氨酸-天门冬氨酸(Asp-Glu-Val-Asp,DEVD)序列的多肽连接得到标记前体1,通过简便的一步^(18)F标记方法制得放射性分子探针^(18)F-1,分别考察了它在PBS缓冲液和血清中的稳定性,并对其脂水分配系数进行了检测。结果显示,制备^(18)F-1所需放射性标记时间为40 min,放化纯达98%,比活度为1.5 Ci/μmol;4 h内,^(18)F-1在PBS和血清中的稳定性均大于96%;脂水分配系数为log P=-0.995±0.103,表明探针具有较好的水溶性。结果表明^(18)F-1是一个潜在的PET凋亡显像探针,值得进一步研究。 A novel positron emission tomography( PET) molecular probe is designed and prepared fordetecting tumor apoptosis. Its physicochemical and biological properties are evaluated. Precursor 1 is obtained by combining the labeling group with the specific peptide sequence Asp-Glu-Val-Asp(DEVD) using the"click chemistry". Then,one-step ^(18)Fraidolabeling approach is used to acquire the molecular probe ^(18)F1. Octanol-water partition coefficient and stability of ^(18)F1 in PBS and serum are investigated. The results show that ^(18)F1 is obtained within 40 min in good radiochemical purity(98%)and high specific activity(1.5 Ci/μmol),and the log P value is-0.995±0.103,indicating its characteristic of hydrophilicity. These results suggest that ^(18)F1 is a potential PET probe and worthy of further investigation.
出处 《南京理工大学学报》 EI CAS CSCD 北大核心 2018年第1期107-113,119,共8页 Journal of Nanjing University of Science and Technology
基金 江苏省自然科学基金(BK20151118)
关键词 正电子发射断层显像 凋亡显像探针 肿瘤凋亡 分子探针 多肽DEVD 一步18F标记 点击化学 positron emission tomagraphy apoptosis imaging probe tumor apoptosis molecular probe peptide DEVD one-step 18F-radiolabeling click chemistry
分类号 O06 [理学]
作者简介 王伟(1991-),男,硕士生,主要研究方向:分子影像探针,E-mail:wei10060103@163.com;;通讯作者:罗世能(1957-),男,研究员,博士生导师,主要研究方向:药物化学,E-mail:luosineng@jinm.org.
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