Multi-modal imaging of high-risk ductal carcinoma in situ of the breast using C2Am: a targeted cell death imaging agent

Breast Cancer Research

André A. Neves¹  Bangwen Xie¹  Zoltan Szucs¹  Tim J. Larkin¹  Kevin M. Brindle²  Sarah E. Bohndiek³  James Joseph⁴ 

[1] Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Robinson Way, CB2 0RE, Cambridge, UK;Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Robinson Way, CB2 0RE, Cambridge, UK;Department of Biochemistry, University of Cambridge, Cambridge, UK;Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Robinson Way, CB2 0RE, Cambridge, UK;Department of Physics, University of Cambridge, Cambridge, UK;Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Robinson Way, CB2 0RE, Cambridge, UK;Department of Physics, University of Cambridge, Cambridge, UK;Present address: University of Dundee, School of Science and Engineering, Dundee, UK;

关键词: DCIS;    Multi-modal imaging;    Optoacoustic;    Necrosis;    Early detection;   

DOI  :  10.1186/s13058-021-01404-z

来源: Springer

【 摘 要 】

BackgroundDuctal carcinoma in situ (DCIS) is a non-invasive form of early breast cancer, with a poorly understood natural history of invasive transformation. Necrosis is a well-recognized adverse prognostic feature of DCIS, and non-invasive detection of its presence and spatial extent could provide information not obtainable by biopsy. We describe here imaging of the distribution and extent of comedo-type necrosis in a model of human DCIS using C2Am, an imaging agent that binds to the phosphatidylserine exposed by necrotic cells.MethodsWe used an established xenograft model of human DCIS that mimics the histopathological features of the disease. Planar near-infrared and optoacoustic imaging, using fluorescently labeled C2Am, were used to image non-invasively the presence and extent of lesion necrosis.ResultsC2Am showed specific and sensitive binding to necrotic areas in DCIS tissue, detectable both in vivo and ex vivo. The imaging signal generated in vivo using near-infrared (NIR) fluorescence imaging was up to 6-fold higher in DCIS lesions than in surrounding fat pad or skin tissue. There was a correlation between the C2Am NIR fluorescence (Pearson R = 0.783, P = 0.0125) and optoacoustic signals (R > 0.875, P < 0.022) in the DCIS lesions in vivo and the corresponding levels of cell death detected histologically.ConclusionsC2Am is a targeted multi-modal imaging agent that could complement current anatomical imaging methods for detecting DCIS. Imaging the presence and spatial extent of necrosis may give better prognostic information than that obtained by biopsy alone.

【 授权许可】

CC BY