PT - JOURNAL ARTICLE AU - Vladimir Semiglazov AU - Andrey Tseluiko AU - Asel Kudaybergenova AU - Anna Artemyeva AU - Petr Krivorotko AU - Roman Donskih TI - Immunology and immunotherapy in breast cancer AID - 10.20892/j.issn.2095-3941.2021.0597 DP - 2022 May 15 TA - Cancer Biology & Medicine PG - 609--618 VI - 19 IP - 5 4099 - http://www.cancerbiomed.org/content/19/5/609.short 4100 - http://www.cancerbiomed.org/content/19/5/609.full SO - Cancer Biology & Medicine2022 May 15; 19 AB - Immuno-oncology is a rapidly developing field in medicine. Drug combination therapies have already been studied in many clinical trials on various tumor types. In recent years, a checkpoint inhibition therapy with monoclonal antibodies targeting PD-1 and its ligand PD-L1 has been developed. Breast cancer had been examined in the field of immune-oncology relatively recently. This review focuses on clinical evidence regarding immune checkpoint inhibition for curative treatment of various breast cancer subtypes. In addition, we present the results of studies demonstrating the prognostic and predictive value of levels of tumor-infiltrating lymphocytes (CD4 and CD8), their quantitative ratios, and their correlation with regulatory genes (PD-1, PD-L1, and FOX-P3).