Dysregulated levels of activated matrix metalloproteinases (MMPs) are linked to different pathologies, such as cancer, atherosclerosis, neuroinflammation, and arthritis. Therefore, imaging of MMPs with positron-emission tomography (PET) represents a powerful tool for the diagnosis of MMP-associated diseases. Moreover, to distinguish between the distinct functions and roles of individual MMPs in particular pathophysiological processes, their specific imaging must be realized with radiolabeled tracers, such as fluorine-18-labeled MMP inhibitors (MMPIs). Therefore, fluorinated dibenzofuransulfonamide-based MMPIs showing excellent inhibition of MMP-12 and selectivity for MMP-12 over other MMPs were prepared. MMP-12 is a key enzyme in diseases such as chronic obstructive pulmonary disease (COPD) and atherosclerosis. Because of their promising in vitro properties, three candidates (4, 9, and 19) were selected from this library, and radiofluorinated analogues ([¹⁸F]4, [¹⁸F]9, and [¹⁸F]19) were successfully synthesized. Initial in vitro serum stability and in vivo biodistribution studies of the radiolabeled MMPIs with PET demonstrated their potential benefit for preferable MMP-12 imaging.

中文翻译：

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设计，（放射）合成以及体外和体内评估高选择性和有效基质金属蛋白酶12（MMP-12）抑制剂作为正电子发射断层显像的放射性示踪剂

活化基质金属蛋白酶（MMPs）的水平失调与不同的病状相关，例如癌症，动脉粥样硬化，神经炎症和关节炎。因此，用正电子发射断层扫描（PET）对MMP进行成像是诊断MMP相关疾病的有力工具。此外，为了区分单个MMP在特定病理生理过程中的独特功能和作用，必须使用放射性标记的示踪剂（例如氟18标记的MMP抑制剂（MMPI））来实现其特定的成像。因此，制备了氟化的基于二苯并呋喃磺酰胺的MMPI，其显示出对MMP-12的优异抑制作用以及对MMP-12的选择性，其优于其他MMP。MMP-12是慢性阻塞性肺疾病（COPD）和动脉粥样硬化等疾病中的关键酶。4，9和19）从该库中选择，和放射氟化类似物（[ ¹⁸ F] 4，[ ¹⁸ F] 9，和[ ¹⁸ F] 19）成功地合成。初步的体外血清稳定性和放射性标记的MMPIs与PET的体内生物分布研究表明，它们对于优选的MMP-12成像具有潜在的好处。