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Proteomics. 2009 Jun;9(11):2995-3010. doi: 10.1002/pmic.200800016.

Proteomics of RAW 264.7 macrophages upon interaction with heat-inactivated Candida albicans cells unravel an anti-inflammatory response.

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Departamento de Microbiología II, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain.


Murine macrophages (RAW 264.7) were allowed to interact with heat-inactivated cells of Candida albicans SC5314 during 45 min. The proteomic response of the macrophages was then analyzed using 2-D gel electrophoresis. Many proteins having differential expression with respect to control macrophages were identified, and their functions were related to important processes, such as cytoskeletal organization, signal transduction, metabolism, protein biosynthesis, stress response and protein fate. Several of these proteins have been described as being involved in the process of inflammation, such as Erp29, Hspa9a, AnxaI, Ran GTPase, P4hb, Clic1 and Psma1. The analysis of the consequences of their variation unravels an overall anti-inflammatory response of macrophages during the interaction with heat-inactivated cells. This result was corroborated by the measurement of TNF-alpha and of ERK1/2 phosphorylation levels. This anti-inflammatory effect was contrary to the one observed with live C. albicans cells, which induced higher TNF-alpha secretion and higher ERK1/2 phosphorylation levels with respect to control macrophages.

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