Polycystic Kidney, Autosomal Dominant Clinical Trial
Official title:
Daily Caloric Restriction and Intermittent Fasting in Overweight and Obese Adults With Autosomal Dominant Polycystic Kidney Disease
The proposed research will determine the feasibility of delivering two behavioral weight loss interventions for 1 year in adults with autosomal dominant polycystic kidney disease (ADPKD) who are overweight or obese. The study will also compare these two interventions in terms of safety, acceptability, and tolerability. Last, this pilot trial will provide initial insight into a) biological changes and b) changes in kidney growth with each of the two weight loss interventions.
Autosomal dominant polycystic kidney disease (ADPKD) is characterized by development and continued growth of numerous fluid-filled renal cysts that ultimately result in renal failure. Similar to the general population, the prevalence of overweight and obesity have been rising in ADPKD patients, effecting about two-thirds of individuals. Surprisingly, the role of obesity in ADPKD progression is currently unknown. The investigators have novel preliminary data that overweight and obesity are independently associated with substantially faster kidney growth in ADPKD patients. Furthermore, in rodent models of ADPKD, mild-to-moderate food restriction profoundly slows cyst growth and maintains renal function via mechanisms including AMPK-activated kinase pathway activation and suppression of mammalian target of rapamycin/S6 kinase signaling and insulin-like growth factor-1 levels. Collectively, these data suggest that dietary restriction regimens may slow ADPKD progression. Accordingly, the primary aim is to determine the feasibility of delivering a 1 year behavioral weight loss intervention program in 30 overweight/obese adults with ADPKD, based on either daily caloric restriction (DCR) or intermittent fasting (IMF), with a similar (~34%) targeted weekly energy deficit. A key secondary goal is to evaluate safety, acceptability, and tolerability of IMF in ADPKD versus DCR. Last, the third exploratory aim is to a) obtain mechanistic insight into biological pathways that may be altered and b) provide initial insight into any changes in total kidney volume by magnetic resonance imaging with IMF and/or DCR. ;
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