Journal
ANTIOXIDANTS
Volume 12, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/antiox12020513
Keywords
nitric oxide; chronic kidney disease; asymmetric dimethylarginine; hypertension; renin-angiotensin system; oxidative stress; nanoparticle
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This study investigated the use of Cu/ZIF-8 nanoparticles to deliver GSNO and effectively reduce hypertension and improve kidney function in a pediatric CKD model. The nanoparticles enhanced endogenous NO generation, reduced renal oxidative stress, and downregulated the renin-angiotensin system. This research has the potential to improve the treatment of pediatric CKD.
Hypertension is the most common complication of chronic kidney disease (CKD) in children but is still poorly controlled. Nitric oxide (NO) deficiency plays a pivotal role in CKD and hypertension. NO is known to have health benefits, while NO typically has a short half-life and is not specifically targeted. In this study, we used a pediatric CKD model, which was induced in young rats by feeding them 0.25% adenine. We investigated two different NO donors, namely S-nitrosoglutathione (GSNO) and diethylenetriamine/NO adduct (DETA NONOate) via intraperitoneal injection at 10 mg/kg/day daily for 3 weeks. GSNO was delivered by Cu2+-doped zeolitic imidazolate framework (Cu/ZIF-8) nanoparticles to generate NO. As a result, we observed Cu/ZIF-8 nanoparticles were successfully loaded with GSNO and were able to release NO. Young rats fed with adenine displayed kidney dysfunction and hypertension at 9 weeks of age, which were prevented by GSNO-loaded nanoparticle or DETA NONOate treatment. GSNO-loaded nanoparticles reduced CKD-induced hypertension, which was related to an enhanced endogenous NO-generating system, reduced renal oxidative stress, and downregulated several components belonging to the classic renin-angiotensin (RAS) system. Our results cast new light on targeting NO delivery through the use of nanoparticles aiming to improve child-focused outcomes related to CKD worthy of clinical translation.
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