Synthetic probes for in vitro purification and in vivo tracking of hepatocytes derived from human pluripotent stem cells
作者:Ji Young Park、Jiyou Han、Hyo Sung Jung、Gyunggyu Lee、Hyo Jin Kim、Gun-Sik Cho、Han-Jin Park、Choongseong Han、Jong Seung Kim、Jong-Hoon Kim
DOI:10.1016/j.biomaterials.2019.119431
日期:2019.11
Hepatocytes derived from human pluripotent stem cells (hPSCs) are promising candidates for cell therapy and drug discovery. However, it remains challenging to efficiently purify hepatocytes from undesired cell types after differentiation and to accurately monitor grafted cells after transplantation. Indocyanine Green (ICG), an FDA-approved, near-infrared (NIR) dye, has been used for various clinical
源自人类多能干细胞(hPSC)的肝细胞有望用于细胞治疗和药物开发。然而,在分化后从不期望的细胞类型中有效纯化肝细胞以及在移植后准确地监测移植的细胞仍然具有挑战性。吲哚菁绿(ICG)是FDA批准的近红外(NIR)染料,已用于各种临床目的,并且仅被肝细胞吸收。但是,ICG的发射波长长(λem > 800 nm),超出了荧光激活细胞分选(FACS)系统的检测范围。此外,它很容易从肝细胞中清除,从而阻碍了其在近红外成像中的应用。在这里,我们根据ICG的特性设计和合成了两种不同的探针。1)肝细胞净化剂(HPA, λ EM = 562纳米),用于体外排序和2)肝细胞成像剂(HIA, λ EM = 817 nm)的为高效的体内NIR成像。我们使用基于HPA探针的FACS纯化从各种hPSC系中获得了高度富集的hPSC衍生肝细胞(hPSC-Heps)群体。此外,通过HIA标记和NIR成像,可以直接观察