Kimata H. Brain-derived neurotrophic factor selectively enhances allergen-specific IgE production.
Neuropeptides 2005;
39:379-83. [PMID:
16026835 DOI:
10.1016/j.npep.2005.06.001]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2005] [Indexed: 10/25/2022]
Abstract
We studied the effect of brain-derived neurotrophic factor (BDNF) on in vitro Japanese cedar pollen (JCP)-specific IgE production by mononuclear cells from atopic keratoconjunctivitis patients with JCP allergy. BDNF enhanced JCP-specific IgE production in a dose-dependent fashion in cultures of mononuclear cells stimulated with JCP, and maximal enhancement was achieved at 10 ng/ml. In contrast, BDNF had no effect on JCP-specific IgA or IgG4 production. On the other hand, other neurotrophins, NGF, NT-3, or NGF failed to enhance JCP-specific IgE production. Moreover, anti-BDNF mAb specifically blocked BDNF-induced enhancement of JCP-specific IgE production. Study for cytokine production revealed that BDNF decreased production of Th1 cytokines, IFN-gamma and IL-12, while it had no effect on production of TH2 cytokines, IL-4, IL-10 and IL-13, in cultures of mononuclear cells stimulated with JCP. These results indicate that BDNF relatively skews cytokine pattern toward Th2 type. Collectively, BDNF may increase allergen-specific IgE production, which may in turn aggravate allergic symptoms.
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