並列タイトル等ミャンマー人低分化型肝細胞がんに於ける核内Pygo2のc-Myc, PCNA, Bcl9との相関的発現上昇
タイトル（掲載誌）Acta Histochemica et Cytochemica
授与機関名Nagasaki University (長崎大学)
一般注記In Myanmar, hepatocellular carcinoma (HCC) is commonly seen in young adult and associated with poor prognosis, while the molecular mechanisms that characterize HCC in Myanmar are unknown. As co-activation of Wnt/β-catenin signaling and c-Myc (Myc) are reported to associate with malignancy of HCC, we immunohistochemically investigated the expression of Pygo2 and Bcl9, the co-activators of the Wnt/β-catenin signaling, Myc and PCNA in 60 cases of Myanmar HCC. Pygo2 expression was confirmed by in situ hybridization. The signal intensity was measured by image analyzer and then statistically analyzed. As a result, the expression of Pygo2 was significantly higher in HCC compared to normal liver tissue and the nuclear signal was the most intense in poorly differentiated HCC. Cytoplasmic Bcl9 was expressed in the normal liver tissue but decreased in HCC with the progression of histopathological grade. Myc was significantly higher in poorly differentiated HCC, whereas PCNA labeling index increased with the progression of histopathological grade. Nuclear Pygo2 showed strong correlation with nuclear Myc (P < 0.01) and PCNA (P < 0.001), and inversely correlated with cytoplasmic Bcl9 (P < 0.01). Our results suggested Wnt/β-catenin and Myc signaling is commonly activated in Myanmar HCC and that the correlative upregulation of nuclear Pygo2 and Myc characterizes the malignant features of HCC in Myanmar.
長崎大学学位論文 学位記番号:博(医歯薬)甲第1417号 学位授与年月日:令和4年3月18日
Author: Myo Win Htun, Yasuaki Shibata, Kyaw Soe, Takehiko Koji
Citation: Acta Histochemica et Cytochemica, 54(6), pp. 195-206; 2021
identifier:Nagasaki University (長崎大学), 博士(医学) (2022-03-18)
DOIinfo:doi/10.1267/ahc.21-00090
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