Involvement of protein kinase A in histamine-mediated inhibition of IL-2 mRNA expression in mouse splenocytes

Larisa Y. Poluektova, Gregory K. Huggler, Eric B. Patterson, Manzoor M. Khan

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The release of histamine from mast cells and basophils during allergic reactions can regulate functions of T cells and may influence the nature of the immune response to a given antigen. The effects of histamine on T lymphocytes are associated with its binding to H2-receptors linked with adenylate cyclase, elevation of cAMP levels and activation of cAMP-dependent protein kinase (PKA). In this report we explore the role of PKA in histamine-mediated effects on IL-2 mRNA expression and IL-2 protein secretion. Fresh isolated mouse splenocytes (C57Bl/6) were pretreated with histamine (10-4 M) for 1 h in the presence or absence of Rp-cAMPS (50 μM), an inhibitor of PKA regulatory subunit. The cells were then washed thoroughly and activated with plate-bound anti-CD3 (5 μg/ml), or PHA (1:100) or PMA+ionomycin (10 ng/ml, 1 μg/ml) for 6 h. Pretreatment with histamine inhibited IL-2 mRNA expression and secretion in cells activated with anti-CD3 or PMA, but not in cells activated with PMA+ionomycin. Rp-cAMPS prevented histamine-mediated suppression and did not itself affect IL-2 production. These results provide evidence that histamine affected IL-2 production when the cells were activated via the T cell receptor (TCR)/CD3 complex, but did not interfere with signal transduction pathways downstream of PKC leading to production of IL-2. These effects of histamine on IL-2 secretion and mRNA expression were mediated via PKA. Copyright (C) 1999 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)77-87
Number of pages11
Issue number2
StatePublished - Feb 1999
Externally publishedYes


  • Histamine
  • Interleukin-2
  • Protein kinase A
  • Rp-cAMPS

ASJC Scopus subject areas

  • Pharmacology


Dive into the research topics of 'Involvement of protein kinase A in histamine-mediated inhibition of IL-2 mRNA expression in mouse splenocytes'. Together they form a unique fingerprint.

Cite this