Nrf2 alleviates radiation-induced rectal injury by inhibiting of necroptosis.
Biochem Biophys Res Commun
; 554: 49-55, 2021 05 21.
Article
in En
| MEDLINE
| ID: mdl-33774279
ABSTRACT
Radiation-induced rectal injury is one of the common side effects of pelvic radiation therapy. This study aimed to explore the role of nuclear factor erythroid 2-related factor 2 (Nrf2) in this process. In vivo, knockout (KO) of Nrf2 led to aggravated radiation-induced histological changes in the rectums. In vitro, interference or overexpression of Nrf2 resulted in enhanced or reduced radiosensitivity in human intestinal epithelial crypts (HIEC) cells, respectively. A potential relationship between Nrf2 and necroptosis was identified using RNA sequencing (RNA-seq) and western blotting (WB), which showed that necroptosis-related proteins were negatively correlated with Nrf2. Upon treatment with necrostatin-1 (Nec-1), the increased radiosensitivity, decreased cell viability, increased γH2AX foci formation, and decreased mitochondrial membrane potential (MMP) in Nrf2-interfered HIEC cells were alleviated. A significant recovery in morphological alterations was also observed in Nrf2 KO mice administered with Nec-1. Taken together, our results highlight the important protective effect of Nrf2 in radiation-induced rectal injury through the inhibition of necroptosis, and the physiological significance of necroptosis in radiation-induced rectal injury.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiation Injuries
/
Rectum
/
NF-E2-Related Factor 2
Type of study:
Prognostic_studies
Limits:
Animals
/
Female
/
Humans
Language:
En
Journal:
Biochem Biophys Res Commun
Year:
2021
Document type:
Article