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Modulation of human monocyte/macrophage activity by bDMARDS: an in vitro study

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Abstract

Tocilizumab,etanerceptandabataceptarebiologicaldrugsusedinthetherapyofRheumatoidArthritis (RA). Theirmechanismofactioniswelldocumentedbuttheirdirecteffectsonhumanmonocytes/ macrophageshavenotbeenfullyinvestigated.Theobjectiveofthisstudywastoevaluate in vitro the influence ofthesedrugsonmonocytes/macrophagesfromhealthyvolunteers. Human monocyteswereisolatedfromhealthyanonymousvolunteersandculturedassuchordif- ferentiatedtomonocyte-derivedmacrophages(MDMs).Theeffectoftocilizumab,etanerceptandaba- tacept (atconcentrationssimilartothoseinplasmaofpatients)onsuperoxideanionproduction,matrix metalloproteinase-9(MMP-9)geneexpressionandactivity,PeroxisomeProliferator-ActivatedReceptor (PPAR)γ expressionandcellphenotypewasevaluated. Exposure ofmonocytes/macrophagestotocilizumab,etanerceptorabataceptresultedinasignificant decrease ofthePMA-inducedsuperoxideanionproduction.Interestingly,theexpressionofPPARγ was significantly increasedonlybytocilizumab,whileetanerceptwastheonlyoneabletosignificantly re- duce MMP-9geneexpressionandinhibittheLPS-inducedMMP-9activityinmonocytes.Wheneta- nerceptandabataceptwereaddedtothedifferentiatingmedium,bothsignificantly reducedtheamount of CD206þMDM. This studydemonstratesthatetanercept,abataceptandtocilizumabaffectdifferentlyhuman monocytes/macrophages.Inparticular,theIL-6antagonisttocilizumabseemstobemoreeffectivein inducing ananti-inflammatory phenotypeofmonocytes/macrophagescomparedtoetanerceptand abatacept, alsoinlightoftheup-regulationofPPARγ whose anti-inflammatoryeffectsarewellre- cognised.
Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalEuropean Journal of Pharmacology
Volume780
DOIs
Publication statusPublished - 2016

Keywords

  • Monocytes/macrophages Inflammation Biological drugs

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