The role of urinary supersaturations for lithogenic salts in the progression of autosomal dominant polycystic kidney disease.

Ferraro, Pietro Manuel; Bargagli, Matteo; Faller, Nicolas; Anderegg, Manuel A; Huynh-Do, Uyen; Vogt, Bruno; Gambaro, Giovanni; Fuster, Daniel G (2023). The role of urinary supersaturations for lithogenic salts in the progression of autosomal dominant polycystic kidney disease. Journal of nephrology JN, 36(4), pp. 1011-1018. Wichtig Editore 10.1007/s40620-022-01540-5

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Autosomal dominant polycystic kidney disease (ADPKD) is associated with significant risk of forming kidney stones, especially those made of calcium oxalate and uric acid, compared with the general population. Since crystals are able to activate the inflammasome and lead to cell injury, crystalluria might worsen ADPKD natural history, acting as a third hit.


The Bern ADPKD registry is a prospective observational cohort study. Height-adjusted total kidney volume (ht-TKV) was measured at baseline and every 3 years. Twenty-four hour urinary solute excretions collected at baseline and eGFR measurements over time were included in this analysis. Twenty-four hour urinary supersaturations (SS) for calcium oxalate, calcium phosphate and uric acid were calculated using EQUIL-2. Linear regression models were used to assess linear and non-linear associations between slopes of ht-TKV and eGFR with SSs and 24 h urinary solute excretions.


Seventy-seven participants (mean age 45.0 [SD 12.9] years, eGFR 76.4 [28.3] mL/min/1.73 m2) were included, with a median follow-up of 4 years. The median slopes of ht-TKV and eGFR were 3.9 percent/year and 2.9 mL/min/1.73 m2/year, respectively. SS for uric acid showed a direct, linear association (p value for linearity 0.035) with ht-TKV slope. When analyzing individual components, urinary uric acid, ammonium, magnesium and sulfate were all directly associated with ht-TKV slope. Urinary sulfate was also directly associated with eGFR slope.


Uric acid supersaturation and several other urinary components are identified as predictors of cyst growth in patients with ADPKD. Future studies with a dedicated design are needed to investigate the pathophysiological mechanisms underlying these associations.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Dermatology, Urology, Rheumatology, Nephrology, Osteoporosis (DURN) > Clinic of Nephrology and Hypertension

UniBE Contributor:

Bargagli, Matteo, Faller, Nicolas, Anderegg, Manuel, Huynh-Do, Uyen, Vogt, Bruno, Fuster, Daniel Guido


600 Technology > 610 Medicine & health




Wichtig Editore




Pubmed Import

Date Deposited:

19 Dec 2022 08:46

Last Modified:

30 May 2023 00:12

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Uncontrolled Keywords:

Autosomal dominant polycystic kidney disease Crystalluria Disease progression Glomerular filtration rate Urinary supersaturation




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