Abstract
Liver cancer is one of the most prevalent cancers in Japan with hepatocellular carcinoma (HCC) as the major histological subtype. Successful novel treatments for HCC have been reported; however, recurrences or metastasis may occur, which results in poor prognoses and high mortality of HCC patients. Fascin, an actin-bundling protein, regulates cell adhesion, migration, and invasion. Its overexpression positively correlates with poor prognosis of malignant tumors, and Fascin is considered as one of the tumor biomarkers and therapeutic target proteins. In this study, we attempted to reveal the relationship between Fascin and HCC using HLE, one of the human HCC cell lines. We performed the study with classical immunocytochemistry and recently developed techniques, such as wound-healing assay, spheroid cultivation, and low-vacuum scanning electron microscopy (LV-SEM). Non-Fascin-knockdown (FKD) cell spheroid had a regular spherical appearance with tight cell–cell connections, while FKD cell spheroid had an irregular shape with loose cell–cell connections. Cells of non-FKD spheroid presented fibrous protrusions on the cell surface, contrarily, cells of FKD spheroids showed bulbous-shaped protrusions. Morphological observation of FKD and non-FKD HLE spheroids were performed using LV-SEM. Our study may help to reveal the roles of Fascin in the process of HCC formation and its malignancy.
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Acknowledgements
We would like to thank Cherish Warden for English editing. We also appreciate the LVSEM Study Group of Renal Biopsy and Hitachi High-Tech for a provision of the LVSEM as a part of the grant research No. 006 of the LVSEM Study Group of Renal Biopsy.
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YH and YY conceived, planned, and carried out the experiments. YH is the main contributor for performing the experiment and YY is for writing the manuscript. IM supervised the creation of the manuscript. All authors have read and approved the final manuscript.
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Hayashi, Y., Yamamoto, Y. & Murakami, I. Micromorphological observation of HLE cells under knockdown of Fascin using LV-SEM. Med Mol Morphol 56, 257–265 (2023). https://doi.org/10.1007/s00795-023-00362-z
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DOI: https://doi.org/10.1007/s00795-023-00362-z