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The role of regulatory T Lymphocytes in immune control of MC-2 Fibrosarcoma

Jukić, Tomislav; Jurin Martić, Ana; Ivanković, Siniša; Antica, Mariastefania; Pavan Jukić, Doroteja; Rotim, Cecilija; Jurin, Mislav (2020) The role of regulatory T Lymphocytes in immune control of MC-2 Fibrosarcoma. Acta clinica Croatica, 59 (2). pp. 351-358. ISSN 0353-9466

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The role of T regulatory lymphocytes (Treg) particularly in cancer is well known. The goal of the present study was to determine the contribution of these lymphocytes in the regulation of anti-tumor immunity of CBA/HZgr mice against MC-2 fibrosarcoma (4th generation of methylcholanthrene induced tumor). The levels of T lymphocytes (CD4+, CD8+ and CD4+CD25+) were determined 8 and 20 days after tumor transplantation. Further, the role of CD4+CD25+ (Tregs) in tumor-host interaction was evaluated in vitro and in vivo by using specific monoclonal antibodies. We found that splenocytes of both control and Treg depleted tumor bearing mice strongly but differently inhibited growth of tumor cells in vitro. While splenocytes of untreated mice exhibited significant decrease of this activity (from 74.4% to 62.6% and 32.95%), the splenocytes of Treg depleted mice showed increase of this activity (from 79.5% to 84.3% and 86.2%) from day 6 to day 13 and day 21 after tumor grafting, respectively. Further, upon i.v. injecting specific monoclonal anti-Treg antibody tumor immediately prior to tumor cell intracutaneous transplantation, the tumor was rejected after initial growth. In treated mice, the incidence of Treg cells was very low initially, reaching normal values two weeks later. These animals were shown to be resistant to tumor transplantation four months later.

Item Type: Article
Uncontrolled Keywords: regulatory T lymphocytes ; tumor growth ; specific monoclonal antibodies ; experimental mice
Subjects: BIOMEDICINE AND HEALTHCARE > Clinical Medical Sciences
Divisions: Division of Molecular Biology
Division of Molecular Medicine
Project titleProject leaderProject codeProject type
Znanstveni centar izvrsnosti za reproduktivnu i regenerativnu medicinu – istraživanja novih platormi i potencijala-CERRMSiniša Volarević; Slobodan Vukičević; Davor JežekKK.
Depositing User: Siniša Ivanković
Date Deposited: 07 Feb 2022 11:20
DOI: 10.20471/acc.2020.59.02.20

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