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Cell-cycle inhibition and immune microenvironment in breast cancer treated with ribociclib and letrozole or chemotherapy

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Title: Cell-cycle inhibition and immune microenvironment in breast cancer treated with ribociclib and letrozole or chemotherapy
Authors: Tomás Pascual, Aranzazu Fernandez-Martinez, Yash Agrawal, Adam D. Pfefferle, Nuria Chic, Fara Brasó-Maristany, Blanca Gonzàlez-Farré, Laia Paré, Guillermo Villacampa, Cristina Saura, Cristina Hernando, Montserrat Muñoz, Patricia Galván, Xavier Gonzàlez-Farré, Mafalda Oliveira, Miguel Gil-Gil, Eva Ciruelos, Patricia Villagrasa, Joaquín Gavilá, Aleix Prat, Charles M. Perou
Source: npj Breast Cancer, Vol 10, Iss 1, Pp 1-11 (2024)
Publisher Information: Nature Portfolio, 2024.
Publication Year: 2024
Collection: LCC:Neoplasms. Tumors. Oncology. Including cancer and carcinogens
Subject Terms: Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
More Details: Abstract In this study, we performed genomic analyses of cell cycle and tumor microenvironment changes during and after ribociclib and letrozole or chemotherapy in the CORALLEEN trial. 106 women with untreated PAM50-defined Luminal B early breast cancers were randomly assigned to receive neoadjuvant ribociclib and letrozole or standard-of-care chemotherapy. Ki67 immunohistochemistry, tumor-infiltrating lymphocytes quantification, and RNA sequencing were obtained from tissue biopsies pre-treatment, on day 14 of treatment, and tumor specimens from surgical resection. Results showed that at surgery, Ki67 and the PAM50 proliferation scores were lower after ribociclib compared to chemotherapy. However, consistent reactivation of tumor cell proliferation from day 14 to surgery was only observed in the ribociclib arm. In tumors with complete cell cycle arrest (CCCA) at surgery, PAM50 proliferation scores were lower in the ribociclib arm compared to chemotherapy (p
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2374-4677
Relation: https://doaj.org/toc/2374-4677
DOI: 10.1038/s41523-024-00625-7
Access URL: https://doaj.org/article/3f189cf1ef8a4f74a950d11ff22079b9
Accession Number: edsdoj.3f189cf1ef8a4f74a950d11ff22079b9
Database: Directory of Open Access Journals
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  Data: Abstract In this study, we performed genomic analyses of cell cycle and tumor microenvironment changes during and after ribociclib and letrozole or chemotherapy in the CORALLEEN trial. 106 women with untreated PAM50-defined Luminal B early breast cancers were randomly assigned to receive neoadjuvant ribociclib and letrozole or standard-of-care chemotherapy. Ki67 immunohistochemistry, tumor-infiltrating lymphocytes quantification, and RNA sequencing were obtained from tissue biopsies pre-treatment, on day 14 of treatment, and tumor specimens from surgical resection. Results showed that at surgery, Ki67 and the PAM50 proliferation scores were lower after ribociclib compared to chemotherapy. However, consistent reactivation of tumor cell proliferation from day 14 to surgery was only observed in the ribociclib arm. In tumors with complete cell cycle arrest (CCCA) at surgery, PAM50 proliferation scores were lower in the ribociclib arm compared to chemotherapy (p
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