Urinary 8-hydroxydeoxyguanosine is Elevated in Patients with Nephrolithiasis
Affiliations
8-hydroxydeoxyguanosine (8-OHdG) is an oxidatively modified guanosine, which has been widely used as an oxidative DNA damage marker in various diseases. The present study aimed to determine urinary 8-OHdG in nephrolithiasis patients and evaluate its clinical significance. Thirty-six nephrolithiasis patients and 30 healthy subjects were recruited. Urine volume, creatinine, malondialdehyde, beta-N-acetylglucosaminidase (NAG) activity and proteins were measured in 24 h urine samples. Urinary 8-OHdG was determined by competitive enzyme-linked immunosorbent assay. Mineral composition of stones was analyzed using Fourier-transformed infrared spectroscopy. Nephrolithiasis patients excreted urinary 8-OHdG significantly higher than healthy controls. Urinary 8-OHdG levels compared among patients with calcium oxalate, struvite and uric acid stones were insignificantly different. The urinary NAG activity correlated positively with urinary 8-OHdG. Multiple linear regression showed that urinary NAG activity was an independent predictor of urinary 8-OHdG level. Receiver operating characteristic analysis revealed that the urinary 8-OHdG test was adequate for diagnosing nephrolithiasis. At 10 mug/g creatinine cutoff, the 8-OHdG test imparted high specificity (96.67%) and a positive predictive value (91.67%). In conclusion, this is the first report of elevated urinary 8-OHdG excretion in nephrolithiasis patients indicating increased oxidative DNA damage. Increased renal tubular damage was independently associated with elevated urinary 8-OHdG. Elevated urinary 8-OHdG levels adjunct with metabolic profile may be useful for identifying people at risk of stone development.
Association between the oxidative balance score and kidney stones in adults.
Chen Q, Bao W, Kong X, Zhu J, Hou S, Zhang Y World J Urol. 2024; 42(1):425.
PMID: 39037613 DOI: 10.1007/s00345-024-05144-5.
Chik C, Larroque A, Zhuang Y, Feinstein S, Smith D, Andonian S Int J Mol Sci. 2024; 25(10).
PMID: 38791318 PMC: 11121557. DOI: 10.3390/ijms25105280.
A prospective case-control study on the evaluation of oxidative stress in renal stone formers.
Manoharan V, Sharma G, Devana S, Sharma S, Avti P, Chandramouli S Urolithiasis. 2024; 52(1):18.
PMID: 38165517 DOI: 10.1007/s00240-023-01514-7.
Wigner-Jeziorska P, Grebowski R, Saluk J, Bijak M, Szemraj J PLoS One. 2023; 18(10):e0293280.
PMID: 37878647 PMC: 10599546. DOI: 10.1371/journal.pone.0293280.
Hong S, Qin B Nutrients. 2023; 15(17).
PMID: 37686790 PMC: 10490426. DOI: 10.3390/nu15173753.