NDLI: Calcitonin Gene-Related Peptide Regulates Type IV Hypersensitivity through Dendritic Cell Functions

Content Provider	PubMed Central
Author	Mikami, Norihisa Sueda, Kaori Ogitani, Yusuke Otani, Ippei Takatsuji, Miku Wada, Yasuko Watanabe, Keiko Yoshikawa, Rintaro Nishioka, Satoshi Hashimoto, Nagisa Miyagi, Yayoi Fukada, So-ichiro Yamamoto, Hiroshi Tsujikawa, Kazutake
Editor	Mattei, Fabrizio
Copyright Year	2014
Abstract	Dendritic cells (DCs) play essential roles in both innate and adaptive immune responses. In addition, mutual regulation of the nervous system and immune system is well studied. One of neuropeptides, calcitonin gene-related peptide (CGRP), is a potent regulator in immune responses; in particular, it has anti-inflammatory effects in innate immunity. For instance, a deficiency of the CGRP receptor component RAMP 1 (receptor activity-modifying protein 1) results in higher cytokine production in response to LPS (lipopolysaccharide). On the other hand, how CGRP affects DCs in adaptive immunity is largely unknown. In this study, we show that CGRP suppressed Th1 cell differentiation via inhibition of IL-12 production in DCs using an in vitro co-culture system and an in vivo ovalbumin-induced delayed-type hypersensitivity (DTH) model. CGRP also down-regulated the expressions of chemokine receptor CCR2 and its ligands CCL2 and CCL12 in DCs. Intriguingly, the frequency of migrating CCR2+ DCs in draining lymph nodes of RAMP1-deficient mice was higher after DTH immunization. Moreover, these CCR2+ DCs highly expressed IL-12 and CD80, resulting in more effective induction of Th1 differentiation compared with CCR2− DCs. These results indicate that CGRP regulates Th1 type reactions by regulating expression of cytokines, chemokines, and chemokine receptors in DCs.
Related Links	http://dx.doi.org/10.1371/journal.pone.0086367
Starting Page	86367
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	1
Volume Number	9
Language	English
Publisher	Public Library of Science
Publisher Date	2014-01-21
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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