{"title":"子宫内膜液细胞学标本在长期保存后可保持高基因组质量用于分子分类。","authors":"Toshiaki Akahane, Ikumi Kitazono, Seiya Yokoyama, Yuriko Higashi, Hiroaki Kobayashi, Akihide Tanimoto","doi":"10.1002/dc.70008","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Background</h3>\n \n <p>Molecular classification of endometrial cancer is useful for predicting prognosis. Genomic examinations are performed using formalin-fixed paraffin-embedded (FFPE) tissues; however, we previously reported that liquid-based cytology (LBC) specimens can be used for next-generation sequencing (NGS). In this study, we evaluated long-term storage effects of LBC specimens on NGS-based genomic profiling, including gene mutations, tumor mutation burden (TMB), and microsatellite instability (MSI).</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>Four LBC fixatives (CellPrep, ThinPrep, CytoRich Red, and SurePath) were used to prepare NGS samples from cultured endometrioid carcinoma HEK-251 cells. Twelve endometrial LBC specimens from patients with endometrioid carcinoma were fixed with CytoRich Red. The TMB, MSI, and gene mutations were analyzed after 1 week, 6 months, and 12 months of storage in cultured HEK-251 cells. Paired LBC and FFPE specimens of endometrioid carcinoma stored for 15–45 months were subjected to NGS-based analysis, and their molecular profiles were compared to those at the initial diagnosis.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>The TMB and MSI did not differ during the storage periods for any of the LBC fixatives in the cultured cells; in addition to gene mutations, they were comparable between the initial and second analyses of the clinical FFPE and LBC specimens. There were no changes in the integrative diagnosis of the endometrioid carcinoma subtype classification.</p>\n </section>\n \n <section>\n \n <h3> Conclusion</h3>\n \n <p>LBC specimens, which preserved high-quality genomes for molecular classification after long-term storage, may be an alternative source of genomic examination for the integrative diagnosis of endometrial cancer.</p>\n </section>\n </div>","PeriodicalId":11349,"journal":{"name":"Diagnostic Cytopathology","volume":"53 11","pages":"536-545"},"PeriodicalIF":1.0000,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Endometrial Liquid-Based Cytology Specimens Preserve High Genome Quality for Molecular Classification After Long-Term Storage\",\"authors\":\"Toshiaki Akahane, Ikumi Kitazono, Seiya Yokoyama, Yuriko Higashi, Hiroaki Kobayashi, Akihide Tanimoto\",\"doi\":\"10.1002/dc.70008\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Background</h3>\\n \\n <p>Molecular classification of endometrial cancer is useful for predicting prognosis. Genomic examinations are performed using formalin-fixed paraffin-embedded (FFPE) tissues; however, we previously reported that liquid-based cytology (LBC) specimens can be used for next-generation sequencing (NGS). In this study, we evaluated long-term storage effects of LBC specimens on NGS-based genomic profiling, including gene mutations, tumor mutation burden (TMB), and microsatellite instability (MSI).</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>Four LBC fixatives (CellPrep, ThinPrep, CytoRich Red, and SurePath) were used to prepare NGS samples from cultured endometrioid carcinoma HEK-251 cells. Twelve endometrial LBC specimens from patients with endometrioid carcinoma were fixed with CytoRich Red. The TMB, MSI, and gene mutations were analyzed after 1 week, 6 months, and 12 months of storage in cultured HEK-251 cells. Paired LBC and FFPE specimens of endometrioid carcinoma stored for 15–45 months were subjected to NGS-based analysis, and their molecular profiles were compared to those at the initial diagnosis.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>The TMB and MSI did not differ during the storage periods for any of the LBC fixatives in the cultured cells; in addition to gene mutations, they were comparable between the initial and second analyses of the clinical FFPE and LBC specimens. There were no changes in the integrative diagnosis of the endometrioid carcinoma subtype classification.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusion</h3>\\n \\n <p>LBC specimens, which preserved high-quality genomes for molecular classification after long-term storage, may be an alternative source of genomic examination for the integrative diagnosis of endometrial cancer.</p>\\n </section>\\n </div>\",\"PeriodicalId\":11349,\"journal\":{\"name\":\"Diagnostic Cytopathology\",\"volume\":\"53 11\",\"pages\":\"536-545\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2025-08-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Diagnostic Cytopathology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/dc.70008\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MEDICAL LABORATORY TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diagnostic Cytopathology","FirstCategoryId":"3","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/dc.70008","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MEDICAL LABORATORY TECHNOLOGY","Score":null,"Total":0}
Endometrial Liquid-Based Cytology Specimens Preserve High Genome Quality for Molecular Classification After Long-Term Storage
Background
Molecular classification of endometrial cancer is useful for predicting prognosis. Genomic examinations are performed using formalin-fixed paraffin-embedded (FFPE) tissues; however, we previously reported that liquid-based cytology (LBC) specimens can be used for next-generation sequencing (NGS). In this study, we evaluated long-term storage effects of LBC specimens on NGS-based genomic profiling, including gene mutations, tumor mutation burden (TMB), and microsatellite instability (MSI).
Methods
Four LBC fixatives (CellPrep, ThinPrep, CytoRich Red, and SurePath) were used to prepare NGS samples from cultured endometrioid carcinoma HEK-251 cells. Twelve endometrial LBC specimens from patients with endometrioid carcinoma were fixed with CytoRich Red. The TMB, MSI, and gene mutations were analyzed after 1 week, 6 months, and 12 months of storage in cultured HEK-251 cells. Paired LBC and FFPE specimens of endometrioid carcinoma stored for 15–45 months were subjected to NGS-based analysis, and their molecular profiles were compared to those at the initial diagnosis.
Results
The TMB and MSI did not differ during the storage periods for any of the LBC fixatives in the cultured cells; in addition to gene mutations, they were comparable between the initial and second analyses of the clinical FFPE and LBC specimens. There were no changes in the integrative diagnosis of the endometrioid carcinoma subtype classification.
Conclusion
LBC specimens, which preserved high-quality genomes for molecular classification after long-term storage, may be an alternative source of genomic examination for the integrative diagnosis of endometrial cancer.
期刊介绍:
Diagnostic Cytopathology is intended to provide a forum for the exchange of information in the field of cytopathology, with special emphasis on the practical, clinical aspects of the discipline. The editors invite original scientific articles, as well as special review articles, feature articles, and letters to the editor, from laboratory professionals engaged in the practice of cytopathology. Manuscripts are accepted for publication on the basis of scientific merit, practical significance, and suitability for publication in a journal dedicated to this discipline. Original articles can be considered only with the understanding that they have never been published before and that they have not been submitted for simultaneous review to another publication.