Inhibitors of ATP-binding cassette transporters suppress interleukin-12 p40 production and major histocompatibility complex II up-regulation in macrophages

György Haskó, Edwin A. Deitch, Zoltán H. Németh, David G. Kuhel, Csaba Szabo

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

ATP-binding cassette (ABC) transporters are a large family of proteins whose role is to translocate various substances across biological membranes. They include the Tangier disease protein ABC1, sulfonylurea receptors (SUR), multidrug resistance protein (MDR), and cystic fibrosis transmembrane regulator (CFTR). In the current study, we investigated the involvement of ABC transporters in the regulation of lipopolysaccharide (LPS) and/or interferon (IFN)-γ-induced interleukin (IL)-12 p40 and tumor necrosis factor (TNF)-α production, nitric oxide formation, as well as major histocompatibility complex II up-regulation in macrophages. The general ABC transporter inhibitor glibenclamide suppressed both IL-12 p40 and nitric oxide production. However, glibenclamide failed to affect the production of TNF-α. The selective ABC1 inhibitors 4,4′-diisothiocyanostilbene-2,2′-disulfonic acid and sulfobromophthalein mimicked the suppressive effect of glibenclamide on IL-12 p40 production. On the other hand, both the MDR inhibitor verapamil and CFTR blocker 2,2′-iminodibenzoic acid failed to suppress the production of IL-12 p40. Furthermore, selective inhibitors and activators of SURs were without effect. In agreement with the pharmacological data, macrophages expressed mRNA for ABC1, but not SURs or CFTR. Intracellular levels of IL-12 p40 were decreased by glibenclamide, suggesting that glibenclamide does not affect IL-12 p40 secretion. The effect of glibenclamide did not involve an interference with the activation of the p38 and p42/44 mitogen-activated protein kinases or c-Jun kinase. Glibenclamide also suppressed IFN-γ-induced up-regulation of major histocompatibility complex II. Taken together, our results indicate that ABC proteins regulate LPS and/or IFN-γ-induced macrophage activation.

Original languageEnglish (US)
Pages (from-to)103-110
Number of pages8
JournalJournal of Pharmacology and Experimental Therapeutics
Volume301
Issue number1
DOIs
StatePublished - 2002
Externally publishedYes

Fingerprint

ATP-Binding Cassette Transporters
Glyburide
Interleukin-12
Major Histocompatibility Complex
Up-Regulation
Macrophages
Cystic Fibrosis
Interferons
P-Glycoproteins
Lipopolysaccharides
Nitric Oxide
Tangier Disease
Tumor Necrosis Factor-alpha
Sulfonylurea Receptors
Sulfobromophthalein
Acids
Macrophage Activation
Mitogen-Activated Protein Kinase 1
Verapamil
adjuvant P40

ASJC Scopus subject areas

  • Pharmacology

Cite this

Inhibitors of ATP-binding cassette transporters suppress interleukin-12 p40 production and major histocompatibility complex II up-regulation in macrophages. / Haskó, György; Deitch, Edwin A.; Németh, Zoltán H.; Kuhel, David G.; Szabo, Csaba.

In: Journal of Pharmacology and Experimental Therapeutics, Vol. 301, No. 1, 2002, p. 103-110.

Research output: Contribution to journalArticle

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