TY - JOUR
T1 - CCR8 leads to eosinophil migration and regulates neutrophil migration in murine allergic enteritis
AU - Blanco-Pérez, Frank
AU - Kato, Yoichiro
AU - Gonzalez-Menendez, Irene
AU - Laiño, Jonathan
AU - Ohbayashi, Masaharu
AU - Burggraf, Manja
AU - Krause, Maren
AU - Kirberg, Jörg
AU - Iwakura, Yoichiro
AU - Martella, Manuela
AU - Quintanilla-Martinez, Leticia
AU - Shibata, Noriyuki
AU - Vieths, Stefan
AU - Scheurer, Stephan
AU - Toda, Masako
N1 - Funding Information:
We thank Dr. Stefan Schülke, Dr. Andrea Wangorsch, Dr. Satoshi Hachimura and Dr. Haruyo Adachi-Nakajima for helpful discussion. This study was supported by German Academic Exchange Service (DAAD) to F.B., and Medical Research Institute (MRI) in Tokyo Women’s Medical University to K.Y.
Publisher Copyright:
© 2019, The Author(s).
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Allergic enteritis (AE) is a gastrointestinal form of food allergy. This study aimed to elucidate cellular and molecular mechanisms of AE using a murine model. To induce AE, BALB/c wild type (WT) mice received intraperitoneal sensitization with ovalbumin (an egg white allergen) plus ALUM and feeding an egg white (EW) diet. Microarray analysis showed enhanced gene expression of CC chemokine receptor (CCR) 8 and its ligand, chemokine CC motif ligand (CCL) 1 in the inflamed jejunum. Histological and FACS analysis showed that CCR8 knock out (KO) mice exhibited slightly less inflammatory features, reduced eosinophil accumulation but accelerated neutrophil accumulation in the jejunums, when compared to WT mice. The concentrations of an eosinophil chemoattractant CCL11 (eotaxin-1), but not of IL-5, were reduced in intestinal homogenates of CCR8KO mice, suggesting an indirect involvement of CCR8 in eosinophil accumulation in AE sites by inducing CCL11 expression. The potential of CCR8 antagonists to treat allergic asthma has been discussed. However, our results suggest that CCR8 blockade may promote neutrophil accumulation in the inflamed intestinal tissues, and not be a suitable therapeutic target for AE, despite the potential to reduce eosinophil accumulation. This study advances our knowledge to establish effective anti-inflammatory strategies in AE treatment.
AB - Allergic enteritis (AE) is a gastrointestinal form of food allergy. This study aimed to elucidate cellular and molecular mechanisms of AE using a murine model. To induce AE, BALB/c wild type (WT) mice received intraperitoneal sensitization with ovalbumin (an egg white allergen) plus ALUM and feeding an egg white (EW) diet. Microarray analysis showed enhanced gene expression of CC chemokine receptor (CCR) 8 and its ligand, chemokine CC motif ligand (CCL) 1 in the inflamed jejunum. Histological and FACS analysis showed that CCR8 knock out (KO) mice exhibited slightly less inflammatory features, reduced eosinophil accumulation but accelerated neutrophil accumulation in the jejunums, when compared to WT mice. The concentrations of an eosinophil chemoattractant CCL11 (eotaxin-1), but not of IL-5, were reduced in intestinal homogenates of CCR8KO mice, suggesting an indirect involvement of CCR8 in eosinophil accumulation in AE sites by inducing CCL11 expression. The potential of CCR8 antagonists to treat allergic asthma has been discussed. However, our results suggest that CCR8 blockade may promote neutrophil accumulation in the inflamed intestinal tissues, and not be a suitable therapeutic target for AE, despite the potential to reduce eosinophil accumulation. This study advances our knowledge to establish effective anti-inflammatory strategies in AE treatment.
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U2 - 10.1038/s41598-019-45653-7
DO - 10.1038/s41598-019-45653-7
M3 - Article
C2 - 31270368
AN - SCOPUS:85069285773
SN - 2045-2322
VL - 9
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 9608
ER -