CDK5/NFAT5-Regulated Transporters Involved in Osmoregulation in Fejervarya cancrivora

Crab-eating frogs (Fejervarya cancrivora) can live in brackish water with a salinity of up to 18‱, although most amphibians are not able to tolerate such high saline environments. To investigate its potential osmoregulation, we conducted experiments in F. cancrivora and F. multistriata. The results...

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Bibliographic Details
Published in:Biology (Basel, Switzerland) Switzerland), 2022-06, Vol.11 (6), p.858
Main Authors: Li, Jiao, Wang, Xinru, Lan, Tian, Lu, Yingnan, Hong, Meiling, Ding, Li, Wang, Lijun
Format: Article
Language:English
Subjects:
Aldehyde reductase
Aquaporin 1
Aquaporin 3
Brackish water
CDK5
Cyclin-dependent kinase 5
Cyclin-dependent kinases
Enzymes
Fejervarya cancrivora
Gene expression
Homeosis
Hypertonicity
ions
Na+/K+-exchanging ATPase
NF-AT protein
NKA activity
Osmoregulation
Osmotic pressure
Physiology
Potassium
Proteins
Saline environments
Saline water
Salinity
Skin
Sodium
Transcription factors
transporters
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Summary:Crab-eating frogs (Fejervarya cancrivora) can live in brackish water with a salinity of up to 18‱, although most amphibians are not able to tolerate such high saline environments. To investigate its potential osmoregulation, we conducted experiments in F. cancrivora and F. multistriata. The results showed that F. cancrivora made use of ions (such as Na+ and Cl−) to increase intracellular concentrations via the Na+/K+-ATPase (NKA) enzyme. The mRNA expression of aldose reductase (AR) was significantly higher in F. cancrivora (p < 0.05), indicating that more organic osmolytes were produced and transported to maintain cellular homeosis. The mRNA expressions of Aquaporin 1 (AQP1) and AQP3 in kidney were significantly higher in F. cancrivora, while AQP expression in skin was higher in F. multistriata (p < 0.05). The mRNA level in activating the transcription of the nuclear factor of activated T cells-5 (NFAT5) which is one of the target genes of regulating the cellular response to hypertonicity, was higher in F. cancrivora. The protein expression of CDK5, the upstream protein of the NFAT5 pathway, was 2 times higher in F. cancrivora. Therefore, we can conclude that CDK5/NFAT5-regulated transporters might be involved in osmoregulation in F. cancrivora.
ISSN:2079-7737
2079-7737
DOI:10.3390/biology11060858