Volume 71, Issue 11 pp. 1561-1574
Original Article

Combined blockade of the histamine H1 and H4 receptor suppresses peanut-induced intestinal anaphylaxis by regulating dendritic cell function

M. Wang

M. Wang

Division of Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO, USA

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J. Han

J. Han

Division of Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO, USA

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J. Domenico

J. Domenico

Division of Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO, USA

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Y. S. Shin

Y. S. Shin

Division of Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO, USA

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Y. Jia

Y. Jia

Division of Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO, USA

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E. W. Gelfand

Corresponding Author

E. W. Gelfand

Division of Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO, USA

Correspondence

Erwin W. Gelfand, MD, National Jewish Health, 1400 Jackson Street, Denver, CO 80206, USA.

Tel.: 303-398-1196

Fax: 303-270-2105

E-mail: [email protected]

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First published: 05 April 2016
Citations: 31
Edited by: Hans-Uwe Simon

Abstract

Background

Signaling through histamine receptors on dendritic cells (DCs) may be involved in the effector phase of peanut-induced intestinal anaphylaxis.

Objectives

The objective of this study was to determine the role of histamine H1 (H1R) and H4 receptors (H4R) in intestinal allergic responses in a model of peanut allergy.

Methods

Balb/c mice were sensitized and challenged with peanut. During the challenge phase, mice were treated orally with the H1R antagonist, loratadine, and/or the H4R antagonist, JNJ7777120. Bone marrow-derived DCs (BMDCs) were adoptively transferred to nonsensitized WT mice. Symptoms, intestinal inflammation, and mesenteric lymph node and intestine mucosal DCs were assessed. Effects of the drugs on DC chemotaxis, calcium mobilization, and antigen-presenting cell function were measured.

Results

Treatment with loratadine or JNJ7777120 individually partially suppressed the development of diarrhea and intestinal inflammation and decreased the numbers of DCs in the mesenteric lymph nodes and lamina propria. Combined treatment with both drugs prevented the development of diarrhea and intestinal inflammation. In vitro, the combination suppressed DC antigen-presenting cell function to T helper cells and DC calcium mobilization and chemotaxis to histamine.

Conclusion

Blockade of both H1R and H4R in the challenge phase had additive effects in preventing the intestinal consequences of peanut sensitization and challenge. These effects were mediated through the limitation of mesenteric lymph node and intestinal DC accumulation and function. Identification of this histamine H1R/H4R-DC-CD4+ T-cell axis provides new insights into the development of peanut-induced intestinal allergic responses and for prevention and treatment of peanut allergy.

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