The proinflammatory cytokines IL-1ß and TNF-α modulate corneal epithelial wound healing through p16Ink4a suppressing STAT3 activity.
J Cell Physiol
; 235(12): 10081-10093, 2020 12.
Article
in En
| MEDLINE
| ID: mdl-32474927
ABSTRACT
The proinflammatory cytokines interleukin-1ß (IL-1ß) and tumor necrosis factor-α (TNF-α) are involved in the corneal inflammatory response and wound healing following corneal injuries. However, the mechanism by which proinflammatory cytokines modulate corneal epithelial wound healing remains unclear. In this study, we found that IL-1ß or TNF-α was transiently elevated during corneal epithelial wound healing in mice. After corneal epithelial debridement, persistent treatment with IL-1ß or TNF-α restrained the level of phosphorylated signal transducer and activator of transcription 3 (p-STAT3) and boosted the level of cell cycle inhibitor p16Ink4a , resulting in impaired corneal epithelial repair. When p16Ink4a was deleted, the p-STAT3 level in corneal epithelium was enhanced and corneal epithelial wound healing was clearly accelerated. In diabetic mice, IL-1ß, TNF-α, and p16Ink4a appeared a sustained and strong expression in the corneal epithelium, and p16Ink4a knockdown partially reverted the defective diabetic corneal epithelial repair. Furthermore, immunoprecipitation proved that p16Ink4a interacted with p-STAT3 and thus possibly suppressed the STAT3 activity. Our findings revealed a novel mechanism that the proinflammatory cytokines modulate corneal epithelial wound healing via the p16Ink4a -STAT3 signaling.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cyclin-Dependent Kinase Inhibitor p16
/
STAT3 Transcription Factor
/
Interleukin-1beta
/
Corneal Injuries
/
Inflammation
Limits:
Animals
/
Humans
Language:
En
Journal:
J Cell Physiol
Year:
2020
Document type:
Article
Affiliation country:
China