Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany.
Comparative Experimental Pathology (CEP), Institute of Pathology, School of Medicine, Technical University of Munich, D-81675, Munich, Germany.
Nat Commun. 2023 Aug 21;14(1):5060. doi: 10.1038/s41467-023-40747-3.
pH alterations are a hallmark of many pathologies including cancer and kidney disease. Here, we introduce [1,5-C]Z-OMPD as a hyperpolarized extracellular pH and perfusion sensor for MRI which allows to generate a multiparametric fingerprint of renal disease status and to detect local tumor acidification. Exceptional long T of two minutes at 1 T, high pH sensitivity of up to 1.9 ppm per pH unit and suitability of using the C-label as internal frequency reference enables pH imaging in vivo of three pH compartments in healthy rat kidneys. Spectrally selective targeting of both C-resonances enables simultaneous imaging of perfusion and filtration in 3D and pH in 2D within one minute to quantify renal blood flow, glomerular filtration rates and renal pH in healthy and hydronephrotic kidneys with superior sensitivity compared to clinical routine methods. Imaging multiple biomarkers within a single session renders [1,5-C]Z-OMPD a promising new hyperpolarized agent for oncology and nephrology.
pH 改变是许多病理学的标志,包括癌症和肾脏疾病。在这里,我们引入 [1,5-C]Z-OMPD 作为一种用于 MRI 的超极化细胞外 pH 和灌注传感器,它可以生成肾脏疾病状态的多参数指纹,并检测局部肿瘤酸化。在 1 T 下,T1 长达两分钟,pH 灵敏度高达每 pH 单位 1.9 ppm,并且可以使用 C 标记作为内部频率参考,这使得能够在健康大鼠肾脏的三个 pH 隔室中进行体内 pH 成像。两个 C-共振的光谱选择性靶向能够在一分钟内同时对灌注和过滤进行 3D 成像以及对 pH 进行 2D 成像,以定量测量健康和积水肾脏的肾血流量、肾小球滤过率和肾 pH,与临床常规方法相比具有更高的灵敏度。在单次会话中成像多个生物标志物,使 [1,5-C]Z-OMPD 成为肿瘤学和肾脏病学有前途的新型超极化剂。
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