Peroxiredoxin 5 Acts as a Negative Regulator of the Sodium-Chloride Cotransporter Involved in Alleviating Angiotensin II-Induced Hypertension
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View abstract on PubMed
Summary
This summary is machine-generated.Peroxiredoxin 5 (Prdx5) deficiency worsens chronic kidney disease-related hypertension by increasing sodium retention via the WNK4-SPAK/OSR1-NCC pathway. Prdx5 may be a target for developing new antihypertensive drugs.
Area Of Science
- Nephrology
- Cardiovascular Research
- Molecular Biology
Background
- Chronic kidney disease (CKD) and hypertension are closely linked, with each condition exacerbating the other.
- Reduced peroxiredoxin 5 (Prdx5) expression is known to accelerate kidney fibrosis, a key feature of CKD.
Purpose Of The Study
- To investigate if Prdx5 deficiency contributes to the worsening of hypertension in the context of CKD.
- To elucidate the molecular mechanisms underlying the relationship between Prdx5, hypertension, and kidney function.
Main Methods
- Infusion of Angiotensin II (Ang II) into wild-type (WT) and Prdx5 knock-out (KO) mice.
- Measurement of blood pressure, reactive oxygen/nitrogen species (ROS/RNS) generation, and fibrotic markers.
- Analysis of sodium-chloride cotransporter (NCC) expression and its upstream signaling pathway (WNK4-SPAK/OSR1) in kidney tissues and cultured cells.
Main Results
- Ang II-infused Prdx5 KO mice exhibited significantly higher blood pressure compared to WT mice.
- Increased ROS/RNS generation and fibrotic markers were observed in Ang II-infused Prdx5 KO mice.
- Prdx5 deficiency upregulated the WNK4-SPAK/OSR1-NCC signaling pathway and NCC phosphorylation, promoting sodium retention.
Conclusions
- Prdx5 plays a crucial role in negatively regulating the WNK4-SPAK/OSR1-NCC signaling axis.
- Prdx5 deficiency exacerbates Ang II-induced hypertension and kidney injury.
- Targeting Prdx5 or the NCC pathway presents a potential strategy for antihypertensive drug development.
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