The Siberian Scientific Medical Journal
 
 
№ 4 / 2014 / 18-24

Phenotypic and functional features of human M2-like macrophages

Author Affiliations

Abstract

The phenotypic and functional properties of macrophages generated from blood monocytes of healthy donors (n = 22) in the presence of GM-CSF using standard conditions (M1-cells) and in conditions of deficiency of serum/growth factors (M2-cells) were investigated. It has been shown that in contrast to the M1-cells, the population of M2-like macrophages was characterized by lower stimulatory activity in allo-MLC and enhanced content of CD206+cells, and cells, expressing of the co-inhibitor (B7-H1) and pro-apoptotic molecules (FasL, TRAIL). Multiplex proteomic analysis of 17 cytokines showed that M2-cells were notable for lower production of immunoregulatory and proinflammatory cytokines/chemokines (IFN-γ, IL-5, IL-6, TNF-α, IL-17, MCP-1). At the same time, the level of immunosuppressive cytokines was either not changed (IL-10), or also reduced (IL-13). Overexpression of B7-H1, CD200R, CD206 and TRAIL on M2-cells was correlated with a lower secretion of IFN-γ, IL-2, IL-5, IL-13, IL-1β, TNF-α, IL-17, MCP-1, MIP-1β. Therefore, the deficiency of the immunoregulatory and inflammatory cytokines is one of the possible mechanisms of low stimulatory activity of M2 macrophages in allo-MLC. Low ability of M2-cells to activate of T-lymphocytes in allo-MLC can also be associated with their direct cytotoxic and/or cytostatic action through FasL/TRAIL– or B7-H1-mediated signaling pathways, respectively.

Key words

macrophages, phenotype, functional dichotomy, cytokines
References
About Authors (Correspondence):

Sakhno L.V. – candidate of biological sciences, senior researcher of laboratory of cellular immunotherapy, e-mail: ct_lab@mail.ru

Tikhonova M.A. – candidate of biological sciences, senior researcher of laboratory of cellular immunotherapy, e-mail: ct_lab@mail.ru

Shevela E.Ya. – doctor of medical sciences, leading researcher of laboratory of cellular immunotherapy, e-mail: ct_lab@mail.ru

Tyrinova T.V. – candidate of biological sciences, researcher of laboratory of cellular immunotherapy, e-mail: ct_lab@mail.ru

Leplina O.Yu. – doctor of medical sciences, leading researcher of laboratory of cellular immunotherapy, e-mail: ct_lab@mail.ru

Ostanin A.A. – doctor of medical sciences, professor, head of clinical department, e-mail: ct_lab@mail.ru

Chernykh E.R. – doctor of medical sciences, professor, corresponding member of RAMS, head of laboratory of cellular immunotherapy, e-mail: ct_lab@mail.ru

Full Text

Received: 08/02/2015