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Differential expression of influx and efflux transport proteins in human antigen presenting cells
Author(s) -
Skazik Claudia,
Heise Ruth,
Bostanci Öznur,
Paul Nora,
Denecke Bernd,
Joussen Sylvia,
Kiehl Klaudia,
Merk Hans F.,
ZwadloKlarwasser Gabriele,
Baron Jens Malte
Publication year - 2008
Publication title -
experimental dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.108
H-Index - 96
eISSN - 1600-0625
pISSN - 0906-6705
DOI - 10.1111/j.1600-0625.2008.00745.x
Subject(s) - abcc1 , multidrug resistance associated protein 2 , organic anion transporting polypeptide , transporter , atp binding cassette transporter , biology , solute carrier family , multidrug resistance associated proteins , western blot , abcg1 , efflux , transport protein , monocyte , microbiology and biotechnology , biochemistry , gene , immunology
Human macrophages (MΦ) express cytochrome P450 enzymes verifying their capacity to metabolize a variety of endogenous and exogenous substances. Here we analysed the mRNA and protein expression of transport proteins involved in the uptake or export of drugs, hormones and arachidonic acid metabolites in dendritic cells (DC) and MΦ compared to their precursors – blood monocytes – using cDNA microarray, RT‐PCR, Western‐blot and immunostaining techniques. The transport proteins studied included members of the solute carrier organic anion transporter family (SLCO) and the multidrug resistance associated proteins (MRP) 1–6 belonging to the ATP‐binding cassette subfamily C (ABCC). We found that only mRNA for SLCO‐2B1, ‐3A1, and ‐4A1 were present in monocytes, MΦ and DC. Most interestingly the expression of SLCO‐2B1 was markedly enhanced in MΦ as compared to monocytes and DC. The presence of mRNA for ABCC1, 3, 4, 5 and 6 in all three cell types was demonstrated. On protein level ABCC1/MRP1 which has been identified as leukotriene C 4 transporter was found to be the most abundant transporter in MΦ and DC. Blocking the ABCC1/MRP1 activity with the specific inhibitor MK571 resulted in a phenotypic change in DC but not in MΦ. Our data show that human blood monocytes and monocyte derived MΦ as well as DC express a specific profile of transporters involved in uptake and export of exogenous molecules like allergens or drugs, but also of endogenous substances in particular of inflammatory lipid mediators like leukotrienes and prostaglandins.