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. 2025 Jun 27;36(12):2456-2468.
doi: 10.1681/ASN.0000000768. Online ahead of print.

A Multiomics Study of Circulating Proteins and Kidney Stone Risk

Le-Ting Zhou  1   2 , Isaac W Stark  2   3 , Muthuvel Jayachandran  2 , Peter C Harris  2 , Andrew D Rule  2 , Kevin Koo  4 , Shannon K McDonnell  5 , Nicholas B Larson  5 , John C Lieske  2   6
Affiliations

A Multiomics Study of Circulating Proteins and Kidney Stone Risk

Le-Ting Zhou et al. J Am Soc Nephrol. .

Abstract

Key Points:

  1. Circulating proteins independently associated with kidney stone diagnosis are related to kidney stone matrix.

  2. Lower circulating uromodulin and higher scavenger receptor cysteine-rich domain-containing group B protein levels were associated with higher kidney stone risk, whereas kidney stone presence elevates plasma matrix metalloproteinase 7 level.

  3. The protective effect of uromodulin against kidney stones was independent of kidney function.

Background: Kidney stones are increasingly recognized as a systemic disorder with a high global prevalence. However, large proteomics studies are lacking.

Methods: An individual-level proteomics study with rigorous adjustments was performed on 35,331 UK Biobank participants to uncover the independent associations between 2922 circulating proteins and prevalent kidney stone disease. Mendelian randomization analysis was used to assess causal relationships. Findings were validated using genomic data from the Mayo Clinic Biobank (N=43,744), concentration-response analysis, transcriptomics analyses, and additional genome-wide association studies.

Results: Nine plasma proteins were independently associated with a kidney stone diagnosis, including reduced uromodulin (UMOD; β, −0.10; 95% confidence interval [CI], −0.15 to −0.05) and elevated scavenger receptor cysteine-rich domain-containing group B protein (SSC4D; β, 0.28; 95% CI, 0.17 to 0.38) and were enriched in extracellular matrix pathways. Mendelian randomization analysis revealed that the presence of kidney stone contributed to elevated levels of matrix metalloproteinase 7. Conversely, lower plasma UMOD (odds ratio [OR], 0.93; 95% CI, 0.90 to 0.97) and higher plasma SSC4D (OR, 1.10; 95% CI, 1.02 to 1.18) were associated with kidney stone risk. These associations were consistently replicated in the Mayo Clinic Biobank dataset (UMOD; OR, 0.92; 95% CI, 0.86 to 0.98; SSC4D; OR, 1.13; 95% CI, 1.01 to 1.27) and further validated by a concentration-response analysis. Single-nucleus RNA sequencing and quantitative trait loci analyses confirmed consistent associations between thick ascending limb UMOD expression and stone former status and with blood and urine UMOD concentrations. Genome-wide association study analysis, adjusted for eGFR, suggested that the protective role of UMOD against kidney stones was independent of kidney function.

Conclusions: This study highlights significant associations between concentrations of specific blood proteins and a history of kidney stones. Several implicated proteins are related to kidney stone matrix, with UMOD independently associated with lower risk and SSC4D with higher risk of kidney stones.

Keywords: biomarkers; human genetics; kidney stones; proteomics.

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Conflict of interest statement

Disclosure forms, as provided by each author, are available with the online version of the article at http://links.lww.com/JSN/F299.

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