Synthesis and evaluation of the novel 2-[18F]fluoro-3-propoxy-triazole-pyridine-substituted losartan for imaging AT1 receptors

被引：19

作者：

Arksey, Natasha ^{[1
,2
]}

Hadizad, Tayebeh ^{[1
]}

Ismail, Basma ^{[1
,2
]}

Hachem, Maryam ^{[1
,2
]}

Valdivia, Ana C. ^{[1
,2
]}

Beanlands, Rob S. ^{[1
,2
]}

deKemp, Robert A. ^{[1
]}

DaSilva, Jean N. ^{[1
,2
,3
]}

机构：

[1] Univ Ottawa, Inst Heart, Cardiac PET Ctr, Ottawa, ON, Canada

[2] Univ Ottawa, Dept Cellular & Mol Med, Ottawa, ON, Canada

[3] Univ Montreal, Dept Radiol Radiooncol & Nucl Med, Univ Montreal Hosp Res Ctr CRCHUM, Montreal, PQ H2X 0A9, Canada

来源：

BIOORGANIC & MEDICINAL CHEMISTRY | 2014年 / 22卷 / 15期

基金：

加拿大健康研究院;

关键词：

Fluorine-18; Click chemistry; Losartan; FPyKYNE; AT(1); PET; CLICK CHEMISTRY; ANGIOTENSIN RECEPTOR; PET; RADIOLIGAND; DISCOVERY; BINDING;

D O I：

10.1016/j.bmc.2014.06.011

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The 2-[F-18]fluoro-3-pent-4-yn-1-yloxypyridine ([F-18]FPyKYNE) analog of the potent non-peptide angiotensin II type 1 receptor (AT(1)R) blocker losartan was produced via click chemistry linking [F-18]FPyKYNE to azide-modified tetrazole-protected losartan followed by TFA deprotection. Preliminary small animal imaging with positron emission tomography (PET) in rats displayed high uptake in the kidneys with good contrast to surrounding tissue. Rat metabolism displayed the presence of 23% unchanged tracer in plasma at 30 min. Upon co-administration with AT(1)R blocker candesartan (2.5, 5 and 10 mg/kg), a dose-dependent reduction (47-65%) in tracer uptake was observed in the kidney, while no difference was observed following AT(2)R blocker PD123,319 (5 mg/kg), indicating binding selectivity for AT(1)R over AT(2)R and potential for imaging AT(1)R using PET. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：3931 / 3937

页数：7

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