A Fluorescent Probe for Rapid, High‐Contrast Visualization of Folate‐Receptor‐Expressing Tumors In Vivo
作者:Koji Numasawa、Kenjiro Hanaoka、Naoko Saito、Yoshifumi Yamaguchi、Takayuki Ikeno、Honami Echizen、Masahiro Yasunaga、Toru Komatsu、Tasuku Ueno、Masayuki Miura、Tetsuo Nagano、Yasuteru Urano
DOI:10.1002/anie.201914826
日期:2020.4.6
Folate receptors (FRs) are membrane proteins involved in folic acid uptake, and the alpha isoform (FR-α) is overexpressed in ovarian and endometrial cancer cells. For fluorescence imaging of FRs in vivo, the near-infrared (NIR) region (650-900 nm), in which tissue penetration is high and autofluorescence is low, is optimal, but existing NIR fluorescent probes targeting FR-α show high non-specific tissue
叶酸受体(FRs)是参与叶酸摄取的膜蛋白,而α同工型(FR-α)在卵巢和子宫内膜癌细胞中过表达。对于体内FRs的荧光成像,组织渗透率高且自发荧光低的近红外(NIR)区域(650-900 nm)是最佳选择,但是现有的针对FR-α的NIR荧光探针显示出很高的非特定的组织吸附,并需要长时间冲洗以可视化肿瘤。我们已经设计并合成了一种新的NIR荧光探针FolateSiR-1,它利用在苯部分具有羧基的Si-若丹明荧光团,通过带负电荷的三肽接头与叶酸配体部分偶联。该探针显示出非常低的背景荧光,并在30分钟内在表达FR的荷瘤小鼠中提供了高达83的肿瘤与背景之比(TBR)。因此,FolateSiR-1有潜力为生物学和临床医学领域的研究做出贡献。