Human rotavirus strain Wa downregulates NHE1 and NHE6 expressions in rotavirus-infected Caco-2 cells.
Virus Genes
; 53(3): 367-376, 2017 Jun.
Article
in En
| MEDLINE
| ID: mdl-28289928
ABSTRACT
Rotavirus (RV) is the most common cause of severe gastroenteritis and fatal dehydration in human infants and neonates of different species. However, the pathogenesis of rotavirus-induced diarrhea is poorly understood. Secretory diarrhea caused by rotavirus may lead to a combination of excessive secretion of fluid and electrolytes into the intestinal lumen. Fluid absorption in the small intestine is driven by Na+-coupled transport mechanisms at the luminal membrane, including Na+/H+ exchanger (NHE). Here, we performed qRT-PCR to detect the transcription of NHEs. Western blotting was employed for protein detection. Furthermore, immunocytochemistry was used to validate the NHE's protein expression. Finally, intracellular Ca2+ concentration was detected by confocal laser scanning microscopy. The results demonstrated that the NHE6 mRNA and protein expressed in the human colon adenocarcinoma cell line (Caco-2). Furthermore, RV-Wa induced decreased expression of the NHE1 and NHE6 in Caco-2 cell in a time-dependent manner. In addition, intracellular Ca2+ concentration in RV-Wa-infected Caco-2 cells was higher than that in the mock-infected cells. Furthermore, RV-Wa also can downregulate the expression of calmodulin (CaM) and calmodulin kinase II (CaMKII) in Caco-2 cells. These findings provides important insights into the mechanisms of rotavirus-induced diarrhea. Further studies on the underlying pathophysiological mechanisms that downregulate NHEs in RV-induced diarrhea are required.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Down-Regulation
/
Gene Expression Regulation
/
Sodium-Hydrogen Exchangers
/
Rotavirus
/
Sodium-Hydrogen Exchanger 1
Limits:
Animals
/
Humans
Language:
En
Journal:
Virus Genes
Journal subject:
BIOLOGIA MOLECULAR
/
VIROLOGIA
Year:
2017
Document type:
Article
Affiliation country:
China