18F标记的白藜芦醇衍生物的合成及作为β-淀粉样斑块显像剂的初步评价
设计并合成四种白藜芦醇衍生物,以评价其用于Aβ-斑块PET显像的可能性。通过化学合成得到四种白藜芦醇衍生物的前体化合物和参比化合物;使用参比化合物测定其与Aβ1-42蛋白聚集体的体外结合性;经[(18)F]亲核取代反应对具有较高亲和力的化合物进行放化标记,并进行体外稳定性、脂水分配系数、生物分布等的测定。体外竞争结合实验显示化合物(E)-1-(3,5-二甲氧基苯乙烯基)-4-(2-(2-(2-氟乙氧基)乙氧基)乙氧基)苯([(19)F]F-7)具有中度的结合性(Ki=43.76nmol/L);[(18)F]F-7的标记时间为32min,放化产率(未校正)为(23±2)%,经SEP PAK C1...
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Published in | 核化学与放射化学 Vol. 39; no. 3; pp. 243 - 251 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
山西医科大学第一医院核医学科,山西太原,030001%天津大学药物科学与技术学院,天津,300072%中山大学附属第一医院核医学PET-CT中心,广东广州,510080
2017
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Subjects | |
Online Access | Get full text |
ISSN | 0253-9950 |
DOI | 10.7538/hhx.2017.39.03.0243 |
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Summary: | 设计并合成四种白藜芦醇衍生物,以评价其用于Aβ-斑块PET显像的可能性。通过化学合成得到四种白藜芦醇衍生物的前体化合物和参比化合物;使用参比化合物测定其与Aβ1-42蛋白聚集体的体外结合性;经[(18)F]亲核取代反应对具有较高亲和力的化合物进行放化标记,并进行体外稳定性、脂水分配系数、生物分布等的测定。体外竞争结合实验显示化合物(E)-1-(3,5-二甲氧基苯乙烯基)-4-(2-(2-(2-氟乙氧基)乙氧基)乙氧基)苯([(19)F]F-7)具有中度的结合性(Ki=43.76nmol/L);[(18)F]F-7的标记时间为32min,放化产率(未校正)为(23±2)%,经SEP PAK C18柱纯化后放化纯度大于95%,且在生理盐水中的稳定性大于3h,具有较好的脂溶性(lg P=3.08);生物分布实验显示化合物[(18)F]F-7具有较快的脑清除,注射后2min和60min的脑摄取分别为(0.55±0.05)%ID/g和(0.06±0.01)%ID/g,清除比达到9。化合物[(18)F]F-7是一种潜在的β-淀粉样斑块PET显像剂。 |
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Bibliography: | 11-2045/TL WANG Hong-liang1 , JIANG Shen-de2 , TANG Gang-hua3 , WU Zhi-fang1 , LI Si-jin1(1. Department of Nuclear Medicine, The First Hospital of Shanxi Medical University, Taiyuan 030001, China; 2. School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; 3. PET-CT Center, Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China) resveratrol derivatives; β-amyloid(Aβ) plaque; radiosynthesis; biological evaluation In this study, four fluorine-substituted resveratrol derivatives were designed and synthesized as candidates for β-amyloid(Aβ) plaque imaging. The in vitro binding studies using Aβ1-42 peptide aggregates were carried out with the four resveratrol derivatives. The F-18 labeled derivatives with the highest binding affinities to Aβ1-42 aggregates were prepared using the appropriate mesylate precursors in DMSO, and the stability and partition eoefficient were also evaluated. And the biodistribution studies were perform |
ISSN: | 0253-9950 |
DOI: | 10.7538/hhx.2017.39.03.0243 |