Publication date: Available online 9 November 2018
Source: Allergology International
Author(s): Yosuke Asada, Mikiko Okano, Waka Ishida, Satoshi Iwamoto, Ken Fukuda, Toshiaki Hirakata, Norihiro Tada, Atsuki Fukushima, Nobuyuki Ebihara, Akira Kudo, Akira Matsuda
Abstract
Background
To investigate the potential roles of periostin (POSTN), an extracellular matrix preferentially expressed in Th2-skewed conditions in the pathophysiology of allergic conjunctivitis.
Methods
The roles of POSTN in ragweed-induced experimental allergic conjunctivitis (RW-EAC) were evaluated using both POSTN-knockout (KO) and congenic BALB/c wild-type mice. Histological analysis was carried out to enumerate eosinophils/basophils in the conjunctival tissue. Th2 cytokine expression was evaluated by quantitative polymerase chain reaction (Q-PCR), and microarray analysis was performed to elucidate genes differentially expressed in POSTN-KO and wild-type mice in the RW-EAC model.
Results
Upregulation of POSTN expression and eosinophil infiltration was observed in subconjunctival tissue of RW-EAC in the wild-type mice. The number of infiltrating eosinophils in the conjunctivae of RW-EAC was diminished in POSTN-KO mice compared to wild-type mice. Q-PCR analysis of conjunctival tissue showed induction of Th2 cytokine (Ccl5, Il4, Il5, Il13) expression in the RW-EAC and attenuated Ccl5, Il4, Il13 mRNA expression in the conjunctivae of the RW-EAC using POSTN-KO mice. Microarray analysis and immunohistochemical analysis showed diminished basophil marker (Mcpt8) expression and reduced numbers of infiltrating basophils in the conjunctivae of RW-EAC in POSTN-KO mice.
Conclusions
POSTN expression in conjunctival tissue plays an indispensable role in the late-phase reaction of the RW-EAC model by facilitating eosinophil/basophil infiltration and augmenting Th2 cytokine expression.
from Allergy and Immunology via a.sfakia on Inoreader https://ift.tt/2Dd3Dhk
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.