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Analysis of tumor morphology and vasculature in an animal model of colorectal cancer using in vivo contrast-enhanced endoluminal ultrasound biomicroscopy

机译:体内对比度增强的内橄榄层超声生物综合症分析了结直肠癌动物模型中的肿瘤形态与脉管系统

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Colorectal cancer (CRC) has a high incidence in the world, being the third leading cause of cancer-related mortality in the United States. Ninety percent of the malignant tumors can be cured if diagnosed in the early stages of localized disease and this motivates a great interest in the development and design of experimental models for CRC detection, staging and monitoring. The aim of this work was to use VEGFR2 (vascular endothelial growth factor receptor 2)-targeted ultrasound contrast agent (UCA) coupled to an endoluminal ultrasound biomicroscopy (eUBM) system to diagnose colon tumors and to analyze tumor vasculature. Colon tumors were induced in mice by using azoxymethane/dextran sulfate sodium and according to histopathology, 55% of colon tumors were adenomas and 45% were adenocarcinomas. Images of the lesion were obtained before and 2–15 minutes after VEGFR2-targeted UCA injection into the mice tail. Compared to post-mortem histopathology, all colonic lesions (lymphoid hyperplasias, ulcerations, thickened mucosa and tumors) were correctly diagnosed by eUBM. In addition, when coupled to a VEGFR2-targeted UCA, the eUBM system provided hyperechoic image areas compatible with intense VEGFR2 staining by immunohistochemical diagnosis. The results suggest that eUBM associated to UCA is a promising tool for histopathologycal and molecular imaging, and could be used to diagnose, stage and monitor colon tumor morphology and vasculature.
机译:结肠直肠癌(CRC)在世界上具有很高的发病率,是美国癌症相关死亡率的第三个主要原因。如果在局部疾病的早期阶段诊断,九十百分之九十的恶性肿瘤可以治愈,这激励了对CRC检测,分期和监测的实验模型的发展和设计的兴趣。该工作的目的是使用VEGFR2(血管内皮生长因子受体2) - 偶联到卵脊肿瘤超声生物显微镜(EUBM)系统,用于诊断结肠肿瘤并分析肿瘤脉管系统。通过使用氮氧基甲烷/葡聚糖硫酸钠诱导小鼠诱导结肠肿瘤,并根据组织病理学,55%的结肠肿瘤是腺瘤,45%是腺癌。在VEGFR2靶向UCA注射到小鼠尾部之前获得病变的图像。与验验后组织病理学相比,通过EUBM正确诊断所有结肠病变(淋巴增生,溃疡,增稠的粘膜和肿瘤)。另外,当耦合到VEGFR2靶向UCA时,EUBM系统提供了通过免疫组织化学诊断的强烈VEGFR2染色兼容的高思想图像区域。结果表明,与UCA相关的EUBM是组织病理学和分子成像的有希望的工具,可用于诊断,阶段和监测结肠肿瘤形态和脉管系统。

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