COMPARISON OF IN VITRO MODELS FOR THE STUDY OF SENESCENCE OF MACROPHAGES ASSOCIATED WITH A TUMOR
- Authors: Pukhalskaia T.V.1,2,3, Yrakova T.R.3, Mihailovskaya V.S.1, Bogdanova D.A.1,2, Demidov O.N.1,2
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Affiliations:
- Sirius University of Science and Technology, Federal Territory Sirius, 354340, Sirius Russia
- Institute of Cytology RAS, St. Petersburg, 194064, Russia
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
- Section: Joint Immunology Forum 2024
- URL: https://rusimmun.ru/jour/article/view/16929
- DOI: https://doi.org/10.46235/1028-7221-16929-COI
- ID: 16929
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Abstract
Abstract
Tumor-associated macrophages (TAMs) are an important and most represented population of immune cells in the tumor microenvironment. To a great extent, TAMs can determine the direction of the antitumor immune response; they can either additionally stimulate it or on the contrary contribute to the formation of immunosuppressive microenvironment. At the same time, under the influence of tumor cells and antitumor therapy, many cells in the tumor microenvironment (TME) can develop a state of senescence. Over the last decade, the topic of senescence and the search for therapies aimed at removing senescent cells has gained popularity. In the search for new therapeutic strategies to treat cancer, senescent cells of the immune system in the tumor microenvironment have received special attention. Since the presence of senescent TAMs in tumors is associated with poor prognosis and poor response to therapy. Given the relevance of studying the role of senescent immune cells in TME (in particular tumor-associated macrophages), we performed a comparative analysis of experimental protocols to obtain tumor-associated macrophages in vitro to determine the most relevant approach.
We tested two protocols for obtaining macrophages from mouse bone marrow: (1) by adding conditioned medium from the L929 mouse sarcoma cell line (LCCM) (LCCM-BMDM); (2) by adding recombinant mouse M-CSF (M-CSF-BMDM). We showed that LCCM-BMDMs, compared to M-CSF-BMDMs, have increased expression of the arginase enzyme (Arg1), which can inhibit the activity of anti-tumor cytotoxic lymphocytes by depleting arginine in the tumor microenvironment. LCCM-BMDMs also exhibited increased secretion of factors characteristic of the senescence-associated secretory phenotype (SASP) - Il-6 and Tnf. Both Arg1 and Il-6 and Tnf are markers characteristic of senescence-associated macrophages. Thus, the use of LCCM to obtain primary macrophage culture limits further steps in creating a model of tumor-associated macrophages that reflects the specific characteristics of the macrophage phenotypic response for different tumor types. And also limits studies of senescence formation in tumor-associated macrophages in models of carcinogenesis other than sarcoma. We believe that differentiation of macrophages in the presence of M-CSF appears to be a more preferable protocol to study TAMs and senescent TAMs to test new therapeutic strategies.
Keywords
About the authors
Tamara Vladimirovna Pukhalskaia
Sirius University of Science and Technology, Federal Territory Sirius, 354340, Sirius Russia;Institute of Cytology RAS, St. Petersburg, 194064, Russia;
Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
Email: tomapukhalskaya@gmail.com
ORCID iD: 0000-0003-4250-2693
Senior Research Laboratory Technician
Russian Federation, 354340, Sirius Russia; St. Petersburg, 194064, Russia; 119991, Moscow, RussiaTaisiya Rinatovna Yrakova
Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
Email: yurakova.taisiya@mail.ru
Senior Research Engineer
Russian Federation, 119991, Moscow, RussiaVeronika Sergeevna Mihailovskaya
Sirius University of Science and Technology, Federal Territory Sirius, 354340, Sirius Russia
Email: veranikamihailovskaja@yandex.ru
ORCID iD: 0000-0002-4264-8177
SPIN-code: 2750-0172
Scopus Author ID: 57877085700
ResearcherId: GZM-1729-2022
Student
Russian Federation, 354340, Sirius RussiaDaria Alekseevna Bogdanova
Sirius University of Science and Technology, Federal Territory Sirius, 354340, Sirius Russia;Institute of Cytology RAS, St. Petersburg, 194064, Russia
Email: dasha351rus@gmail.com
ORCID iD: 0000-0003-2851-3775
SPIN-code: 3453-4351
Scopus Author ID: JKI-4846-2023
ResearcherId: JKI-4846-2023
Junior researcher
Russian Federation, 354340, Sirius Russia; St. Petersburg, 194064, RussiaOleg Nikolaevich Demidov
Sirius University of Science and Technology, Federal Territory Sirius, 354340, Sirius Russia;Institute of Cytology RAS, St. Petersburg, 194064, Russia
Author for correspondence.
Email: demidov.on@mail.ru
Professor, Doctor of Medical Sciences, Leading Researcher
Russian Federation, 354340, Sirius Russia; St. Petersburg, 194064, RussiaReferences
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