Dynamics of the Tumor Immune Microenvironment during Neoadjuvant Chemotherapy of High-Grade Serous Ovarian Cancer

The dynamic changes in the tumor immune microenvironment (TIME) triggered by neoadjuvant chemotherapy (NAC) have not been clearly defined in advanced-stage ovarian cancer. We analyzed the immunologic changes induced by NAC to correlate them with clinical outcomes. We compared the changes in the immu...

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Veröffentlicht in:Cancers 2022-05, Vol.14 (9), p.2308
Hauptverfasser: Lee, Yong Jae, Woo, Ha Young, Kim, Yoo-Na, Park, Junsik, Nam, Eun Ji, Kim, Sang Wun, Kim, Sunghoon, Kim, Young Tae, Park, Eunhyang, Joung, Je-Gun, Lee, Jung-Yun
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container_issue 9
container_start_page 2308
container_title Cancers
container_volume 14
creator Lee, Yong Jae
Woo, Ha Young
Kim, Yoo-Na
Park, Junsik
Nam, Eun Ji
Kim, Sang Wun
Kim, Sunghoon
Kim, Young Tae
Park, Eunhyang
Joung, Je-Gun
Lee, Jung-Yun
description The dynamic changes in the tumor immune microenvironment (TIME) triggered by neoadjuvant chemotherapy (NAC) have not been clearly defined in advanced-stage ovarian cancer. We analyzed the immunologic changes induced by NAC to correlate them with clinical outcomes. We compared the changes in the immune infiltration of high-grade serous carcinoma biopsies before and after NAC via immunohistochemistry (147 paired samples) and whole transcriptome sequencing (35 paired samples). Immunohistochemistry showed significantly increased PD-L1 levels and TIL levels after NAC. Whole transcriptome sequencing revealed that the stromal score, immune score, and cytolytic activity score significantly increased after NAC. An increased tumor-infiltrating lymphocyte (TIL) level in response to NAC was associated with shorter progression-free survival compared with decreased TIL level after NAC. In tumors with increased TIL levels after NAC, the relative fraction of CD8 T cells and regulatory T cells significantly increased with immunohistochemistry. Post-NAC tumors were enriched in gene sets associated with immune signaling pathways, such as regulatory T cell and JAK/STAT signaling pathways. NAC induced dynamic changes in the TIME that increased TIL levels, but their high abundance did not impart any survival benefit. Our data may provide therapeutic strategies to improve the survival benefit from immunotherapies in ovarian cancer.
doi_str_mv 10.3390/cancers14092308
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subjects Biomarkers
Biopsy
Cancer therapies
CD8 antigen
Chemotherapy
Cytolytic activity
Foxp3 protein
Genetic testing
Immunohistochemistry
Immunoregulation
Immunosuppression
Immunotherapy
Infiltration
Lymphocytes
Lymphocytes T
Metastases
Microenvironments
Ovarian cancer
Patients
PD-L1 protein
Signal transduction
Surgery
Transcriptomes
Tumors
title Dynamics of the Tumor Immune Microenvironment during Neoadjuvant Chemotherapy of High-Grade Serous Ovarian Cancer
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