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Updated: Jun 8, 2026

Generation and Expansion of Primary, Malignant Pleural Mesothelioma Tumor Lines

Generation and Expansion of Primary, Malignant Pleural Mesothelioma Tumor Lines

Published on: April 21, 2022

TLE1 expression in malignant mesothelioma.

Atsuji Matsuyama¹, Masanori Hisaoka, Mahoko Iwasaki

¹Department of Pathology and Oncology, University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu, Japan. amatsu@med.uoeh-u.ac.jp

Virchows Archiv : an International Journal of Pathology

|September 22, 2010

Summary

This summary is machine-generated.

TLE1 expression is common in malignant mesothelioma, making it unreliable for distinguishing this cancer from synovial sarcoma. This finding limits TLE1

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Last Updated: Jun 8, 2026

Generation and Expansion of Primary, Malignant Pleural Mesothelioma Tumor Lines

Generation and Expansion of Primary, Malignant Pleural Mesothelioma Tumor Lines

Published on: April 21, 2022

Area of Science:

Oncology
Pathology
Molecular Biology

Background:

Malignant mesothelioma, linked to asbestos, has epithelial, biphasic, and sarcomatoid subtypes.
Distinguishing mesothelioma from synovial sarcoma can be challenging due to similar morphology and marker expression.
TLE1 is a specific marker for synovial sarcoma, but its role in mesothelioma is not fully understood.

Purpose of the Study:

To evaluate TLE1 expression in malignant mesotheliomas.
To assess the diagnostic utility of TLE1 in differentiating mesothelioma from synovial sarcoma.
To investigate the relationship between TLE1, Wnt pathway factors, and mesothelioma markers.

Main Methods:

Immunohistochemical analysis of TLE1, beta-catenin, cyclin D1, calretinin, HBME-1, cytokeratin 5/6, and thrombomodulin.
Study included 29 malignant mesothelioma cases.
Expression levels and associations were analyzed.

Main Results:

TLE1 was expressed in 28 out of 29 malignant mesotheliomas (96.6%).
In 20 cases (69.0%), more than 25% of cells showed TLE1 expression.
No significant association was found between TLE1 expression and other mesothelioma markers.

Conclusions:

Immunohistochemical TLE1 expression has limited value in distinguishing malignant mesothelioma from synovial sarcoma.
TLE1 is frequently expressed in malignant mesothelioma, regardless of subtype.
Further research may be needed to identify reliable markers for differential diagnosis.