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Proteome Profiling of PMJ2-R and Primary Peritoneal Macrophages.

ABSTRACT: In vitro models are often used for studying macrophage functions, including the process of phagocytosis. The application of primary macrophages has limitations associated with the individual characteristics of animals, which can lead to insufficient standardization and higher variability of the obtained results. Immortalized cell lines do not have these disadvantages, but their responses to various signals can differ from those of the living organism. In the present study, a comparative proteomic analysis of immortalized PMJ2-R cell line and primary peritoneal macrophages isolated from C57BL/6 mice was performed. A total of 4005 proteins were identified, of which 797 were quantified. Obtained results indicate significant differences in the abundances of many proteins, including essential proteins associated with the process of phagocytosis, such as Elmo1, Gsn, Hspa8, Itgb1, Ncf2, Rac2, Rack1, Sirpa, Sod1, C3, and Msr1. These findings indicate that outcomes of studies utilizing PMJ2-R cells as a model of peritoneal macrophages should be carefully validated. All MS data are deposited in ProteomeXchange with the identifier PXD022133.

SUBMITTER: Rusanov AL

PROVIDER: S-EPMC8231560 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Proteome profiling of PMJ2-R and primary peritoneal macrophages

Project description:In vitro models are often used to study the functions of macrophages, including the process of phagocytosis. The use of primary macrophages has limitations associated with the individual characteristics of animals, which can lead to insufficient standardization of the results obtained. This disadvantage is lacking in immortalized cell lines. The PMJ2-R cell line was derived from in vivo immortalization and retains many of the primary peritoneal macrophages functions, but little is known about its differences from normal cells. In this article, we carried out a comparative analysis of the proteomes of PMJ2-R cells and primary peritoneal macrophages isolated from the C57BL/J6 mice. Particular attention was paid to the analysis of proteins involved in the process of phagocytosis. A total of 4005 proteins were identified, of which 797 were quantified. Our results indicate that there are significant differences in the abundance of a large number of proteins, including important proteins associated with the process of phagocytosis, such as Elmo1, Gsn, Hspa8, Itgb1, Ncf2, Rac2, Rack1, Sirpa, Sod1, C3, Msr1. Thus, when using PMJ2R cells as model cells in the study of the peritoneal macrophages functions, features revealed in this study should be taken into account.

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