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Sökning: onr:"swepub:oai:DiVA.org:uu-442178" > COX-1 dependent bio...

  • Johnsson, Anna-KarinKarolinska Institutet (författare)

COX-1 dependent biosynthesis of 15-hydroxyeicosatetraenoic acid in human mast cells

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • Elsevier,2021
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:uu-442178
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-442178URI
  • https://doi.org/10.1016/j.bbalip.2021.158886DOI
  • http://kipublications.ki.se/Default.aspx?queryparsed=id:146372930URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • 15-hydroxyeicosatetraenoic acid (15-HETE) is an arachidonic acid derived lipid mediator which can originate both from 15-lipoxygenase (15-LOX) activity and cyclooxygenase (COX) activity. The enzymatic source determines the enantiomeric profile of the 15-HETE formed. 15-HETE is the most abundant arachidonic acid metabolite in the human lung and has been suggested to influence the pathophysiology of asthma. Mast cells are central effectors in asthma, but there are contradictory reports on whether 15-HETE originates from 15-LOX or COX in human mast cells. This prompted the current study where the pathway of 15-HETE biosynthesis was examined in three human mast cell models; the cell line LAD2, cord blood derived mast cells (CBMC) and tissue isolated human lung mast cells (HLMC). Levels and enantiomeric profiles of 15-HETE and levels of the downstream metabolite 15-KETE, were analyzed by UPLC-MS/MS after stimulation with anti-IgE or calcium ionophore A23187 in the presence and absence of inhibitors of COX isoenzymes. We found that 15-HETE was produced by COX-1 in human mast cells under these experimental conditions. Unexpectedly, chiral analysis showed that the 15(R) isomer was predominant and gradually accumulated, whereas the 15(S) isomer was metabolized by the 15hydroxyprostaglandin dehydrogenase. We conclude that during physiological conditions, i.e., without addition of exogenous arachidonic acid, both enantiomers of 15-HETE are produced by COX-1 in human mast cells but that the 15(S) isomer is selectively depleted by undergoing further metabolism. The study highlights that 15-HETE cannot be used as an indicator of 15-LOX activity for cellular studies, unless chirality and sensitivity to pharmacologic inhibition is determined.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Rönnberg, ElinKarolinska Institutet (författare)
  • Fuchs, DavidKarolinska Inst, Dept Med Biochem & Biophys, Div Physiol Chem 2, Stockholm, Sweden. (författare)
  • Kolmert, JohanKarolinska Institutet (författare)
  • Säfholm, JesperKarolinska Institutet (författare)
  • Claesson, Hans-ErikKarolinska Institutet (författare)
  • Hamberg, MatsKarolinska Institutet (författare)
  • Wheelock, Craig E.Karolinska Institutet (författare)
  • Nilsson, GunnarKarolinska Institutet,Uppsala universitet,Hematologi,Karolinska Inst, Immunol & Allergy Div, Dept Med, Stockholm, Sweden.;Karolinska Univ Hosp Solna, Stockholm, Sweden.;Karolinska Inst, Ctr Allergy Res, Stockholm, Sweden.(Swepub:uu)gunnarns (författare)
  • Dahlén, Sven-ErikKarolinska Institutet (författare)
  • Karolinska InstitutetKarolinska Inst, Dept Med Biochem & Biophys, Div Physiol Chem 2, Stockholm, Sweden. (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Biochimica et Biophysica Acta - Molecular and Cell Biology of Lipids: Elsevier1866:51388-19811879-2618

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