京都大学 · 医学
石井貴美教授の研究室は、幹細幹細胞を用いた再生医療、特に肝細胞への分化誘導とその応用に焦点を当てています。ヒト胚性幹細胞や induced pluripotent stem cells (iPSCs) を用いた肝芽洞形成の最適化や、ラットのデセルキュレーション肝スキャフォールドを用いた人工肝の構築にも成功しています。また、肝癌の病態解明や、がん幹細胞のメタスタシス機構に関する研究も並行して進められています。
Figures are computed from collected data and may differ slightly.
Hepatocytes derived from human embryonic stem cells (hESCs) are a potential cell source for regenerative medicine. However, the definitive factors that are responsible for hepatic differentiation of hESCs remain unclear. We aimed to evaluate the effects of various extracellular matrixes and growth factors on endodermal differentiation and to optimize the culture conditions to induce hepatic differentiation of hESCs. The transgene vector that contained enhanced green fluorescent protein (EGFP) un
ESCs are a potential cell source for cell therapy. However, there is no evidence that cell transplantation using ESC-derived hepatocytes is therapeutically effective. The main objective of this study was to assess the therapeutic efficacy of the transplantation of ESC-derived endodermal cells into a liver injury model. The beta-galactosidase-labeled mouse ESCs were differentiated into alpha-fetoprotein (AFP)-producing endodermal cells. AFP-producing cells or ESCs were transplanted into transgeni
Novel hybrid artificial livers using hiPSCs and rat decellularized liver scaffolds were successfully generated, which possessed human hepatic functions.
cHCC-CCA had a mixture of characteristics of HCC and iCCA. Many cases of cHCC-CCA remained cHCC-CCA pathologically even after recurrence.
Primary closure of the site of bile leakage and/or placement of biliary drainage tubes may be recommended in cases involving intraoperative bile leakage. Treatment with fibrin glue with a PGA sheet and/or CSFT might have preventive effects in patients without intraoperative bile leakage.
CD90<sup>+</sup> cells demonstrate high metastatic potential owing to Wnt/β-catenin signaling activation and are associated with poor prognosis in ICC.
We utilized patient-specific 3D liver models based on preoperative computed tomography images as intraoperative navigation and describe our experience. A 1-year and 10-month-old girl with situs inversus totalis underwent living donor liver transplantation for biliary atresia. Information on the hepatic artery, portal vein, inferior vena cava, and liver parenchyma was extracted and segmented from computed tomography images using liver analysis software. Laser lithography produced each 3D part of
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