Contributions of MyD88-dependent receptors and CD11c-positive cells to corneal epithelial barrier function against Pseudomonas aeruginosa.
Contributions of MyD88-dependent receptors and CD11c-positive cells to corneal epithelial barrier function against Pseudomonas aeruginosa.
复制标题
DOI:
10.1038/s41598-017-14243-w
复制
发表时间:
2017-10-23
影响因子:
4.6
通讯作者:
Fleiszig SMJ
中科院分区:
文献类型:
--
作者:
Metruccio MME;Tam C;Evans DJ;Xie AL;Stern ME;Fleiszig SMJ
Previously we reported that corneal epithelial barrier function against Pseudomonas aeruginosa was MyD88-dependent. Here, we explored contributions of MyD88-dependent receptors using vital mouse eyes and confocal imaging. Uninjured IL-1R (−/−) or TLR4 (−/−) corneas, but not TLR2 (−/−), TLR5 (−/−), TLR7 (−/−), or TLR9 (−/−), were more susceptible to P. aeruginosa adhesion than wild-type (3.8-fold, 3.6-fold respectively). Bacteria adherent to the corneas of IL-1R (−/−) or TLR5 (−/−) mice penetrated beyond the epithelial surface only if the cornea was superficially-injured. Bone marrow chimeras showed that bone marrow-derived cells contributed to IL-1R-dependent barrier function. In vivo, but not ex vivo, stromal CD11c+ cells responded to bacterial challenge even when corneas were uninjured. These cells extended processes toward the epithelial surface, and co-localized with adherent bacteria in superficially-injured corneas. While CD11c+ cell depletion reduced IL-6, IL-1β, CXCL1, CXCL2 and CXCL10 transcriptional responses to bacteria, and increased susceptibility to bacterial adhesion (>3-fold), the epithelium remained resistant to bacterial penetration. IL-1R (−/−) corneas also showed down-regulation of IL-6 and CXCL1 genes with and without bacterial challenge. These data show complex roles for TLR4, TLR5, IL-1R and CD11c+ cells in constitutive epithelial barrier function against P. aeruginosa, with details dependent upon in vivo conditions.
登录
查看更多内容
影响因子:
4.2
作者:
Evans DJ;Fleiszig SM
通讯作者:
Fleiszig SM
影响因子:
6.7
作者:
Kugadas A;Christiansen SH;Sankaranarayanan S;Surana NK;Gauguet S;Kunz R;Fichorova R;Vorup-Jensen T;Gadjeva M
通讯作者:
Gadjeva M
影响因子:
4.4
作者:
McDermott, AM;Redfern, RL;Proske, RJ
通讯作者:
Proske, RJ
影响因子:
3.1
作者:
Fleiszig, SMJ;Vallas, V;Mostov, KE
通讯作者:
Mostov, KE
影响因子:
3.4
作者:
McNamara, NA;Van, R;Fleiszig, SMJ
通讯作者:
Fleiszig, SMJ