Abstract.
Objective:
Evaluate the Monocyte Locomotion Inhibitory Factor (MLIF) effect upon the expression of genes encoding human cytokines, receptors and related factors in the human cell line U-937. MLIF (Met-Gln-Cys-Asn-Ser) is an anti-inflammatory pentapeptide produced by Entamoeba histolytica that inhibits many human monocyte functions.
Material and Methods:
U-937 cell line cultured (24 hrs/RPMI). RNA extracted by Trizol method. 385 genes were analyzed on microarray membranes, complement by real-time RT-PCR and protein expression of some affected genes.
Results:
MLIF had a preferentially inhibitory effect on gene expression; four genes were over-expressed and 13 underexpressed in MILF vs. simple medium – constitutive expression. Three genes are over-expressed and 19 under-expressed in MLIF/PMA vs. PMA – induced expression.
Conclusions:
Many modified genes are products regulated by the Nuclear Factor-κB and Mitogen Activated Protein Kinase pathways, suggesting MLIF involvement with these two major pathways for the modulation of the inflammation and immune responses.
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Received 28 November 2006; returned for revision 3 January 2007; received from final revision 12 June 2007; accepted by G. Wallace 10 July 2007
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Silva-García, R., Estrada-García, I., Ramos-Payán, R. et al. The effect of an anti-inflammatory pentapeptide produced by Entamoeba histolytica on gene expression in the U-937 monocytic cell line. Inflamm. res. 57, 145–150 (2008). https://doi.org/10.1007/s00011-007-6199-y
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DOI: https://doi.org/10.1007/s00011-007-6199-y