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<p>Fascin-1, an actin-bundling protein, plays a crucial role in cancer cell motility, invasion, and epithelial–mesenchymal transition (EMT). While its significance has been demonstrated in several malignancies, its clinical relevance in thymic carcinoma remains unclear. We retrospectively analyzed 10 surgically resected thymic carcinoma cases treated at Kochi University Hospital from 2008 to 2024. Immunohistochemical staining was performed to evaluate Fascin-1 expression using the Allred scoring system. Expression of EMT-related markers (TGF-β, pSmad3, Snail, and E-cadherin) was also assessed. Associations between Fascin-1 expression and postoperative recurrence were analyzed. Fascin-1 was highly expressed in tumor regions with low E-cadherin expression and co-localized with EMT-inducing markers such as TGF-β and Snail. Patients with postoperative recurrence showed significantly higher Fascin-1 scores than those without recurrence (<i>P</i> = 0.048). Double immunofluorescence confirmed an inverse relationship between Fascin-1 and E-cadherin expression. High Fascin-1 expression may serve as a potential marker for postoperative recurrence in thymic carcinoma and is closely associated with EMT. These findings suggest Fascin-1 as a promising prognostic biomarker and therapeutic target, although further studies with larger cohorts and functional analyses are warranted.</p>

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Fascin-1 expression is associated with EMT and recurrence in thymic carcinoma: a clinicopathologic study

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Hironobu Okada,
  • Yoshihiro Hayashi,
  • Naoki Furukawa,
  • Yujirou Bunno,
  • Marino Yamamoto,
  • Ryohei Miyazaki,
  • Mitsuko Iguchi,
  • Makoto Toi,
  • Ichiro Murakami,
  • Masaya Tamura

摘要

Fascin-1, an actin-bundling protein, plays a crucial role in cancer cell motility, invasion, and epithelial–mesenchymal transition (EMT). While its significance has been demonstrated in several malignancies, its clinical relevance in thymic carcinoma remains unclear. We retrospectively analyzed 10 surgically resected thymic carcinoma cases treated at Kochi University Hospital from 2008 to 2024. Immunohistochemical staining was performed to evaluate Fascin-1 expression using the Allred scoring system. Expression of EMT-related markers (TGF-β, pSmad3, Snail, and E-cadherin) was also assessed. Associations between Fascin-1 expression and postoperative recurrence were analyzed. Fascin-1 was highly expressed in tumor regions with low E-cadherin expression and co-localized with EMT-inducing markers such as TGF-β and Snail. Patients with postoperative recurrence showed significantly higher Fascin-1 scores than those without recurrence (P = 0.048). Double immunofluorescence confirmed an inverse relationship between Fascin-1 and E-cadherin expression. High Fascin-1 expression may serve as a potential marker for postoperative recurrence in thymic carcinoma and is closely associated with EMT. These findings suggest Fascin-1 as a promising prognostic biomarker and therapeutic target, although further studies with larger cohorts and functional analyses are warranted.