Plasma creatinine and oxidative stress biomarkers in amyotrophic lateral sclerosis.

Journal Article (Journal Article;Multicenter Study)

Objective: To determine the associations between plasma creatinine (PCr), plasma uric acid (PUA), and urinary oxidative stress (OS) biomarkers with the ALSFRS-R at baseline and survival in a large epidemiological cohort study (ALS COSMOS) with a well-phenotyped patient population (N = 355).Methods: Fasting plasma and first void urine samples were obtained. PCr, PUA, urinary 8-oxo-deoxy guanosine (8-oxodG), and 15-F2t-isoprostane (IsoP) were analyzed at baseline, near the midpoint of follow-up, and at the final blood draw (before death or withdrawal from study). We estimated associations between these biomarkers and the ALSFRS-R at baseline and survival.Results: At baseline, PCr correlated with ALSFRS-R (Spearman r = 0.30), percent (%) FVC (r = 0.20), PUA (r = 0.37), and 8-oxodG (r = -0.13, all p < 0.05). Baseline PCr significantly predicted survival (adjusted hazard ratio 0.28, p < 0.001). Time to death from baseline was shortest for those in the lowest two PCr quartiles relative to the highest two quartiles. PCr and ALSFRS-R values were significantly correlated at all three time points (baseline: r = 0.29, midpoint: r = 0.23, final: r = 0.38, all p < 0.001). PCr and PUA significantly declined over time, whereas OS biomarkers significantly increased over time.Conclusions: To date, PCr predicted survival the best, compared to PUA, 8-oxodG, and IsoP. Although PCr represents the degree of muscle mass, it may also represent complex biochemical changes in ALS. Because the field has no reliable prognostic biomarkers, the importance of PCr warrants further investigation through clinical studies in ALS.

Full Text

Duke Authors

Cited Authors

  • Mitsumoto, H; Garofalo, DC; Santella, RM; Sorenson, EJ; Oskarsson, B; Fernandes, JAM; Andrews, H; Hupf, J; Gilmore, M; Heitzman, D; Bedlack, RS; Katz, JS; Barohn, RJ; Kasarskis, EJ; Lomen-Hoerth, C; Mozaffar, T; Nations, SP; Swenson, AJ; Factor-Litvak, P

Published Date

  • May 2020

Published In

Volume / Issue

  • 21 / 3-4

Start / End Page

  • 263 - 272

PubMed ID

  • 32276554

Pubmed Central ID

  • PMC7373369

Electronic International Standard Serial Number (EISSN)

  • 2167-9223

Digital Object Identifier (DOI)

  • 10.1080/21678421.2020.1746810


  • eng

Conference Location

  • England