AI Article Synopsis
- The study investigates levels and protein binding of protein-bound uremic toxins (PBUTs) in children undergoing hemodialysis compared to healthy and chronic kidney disease groups.
- It finds higher concentrations of specific toxins in the hemodialysis group, with an observed positive correlation between age and certain toxin levels.
- Additionally, residual kidney function was linked to lower PBUT levels and influenced their protein binding in the pediatric population.
Article Abstract
Protein-bound uremic toxins (PBUTs) play a role in the multisystem disease that children on hemodialysis (HD) are facing, but little is known about their levels and protein binding (%PB). In this study, we evaluated the levels and %PB of six PBUTs cross-sectionally in a large pediatric HD cohort ( = 170) by comparing these with healthy and non-dialysis chronic kidney disease (CKD) stage 4-5 ( = 24) children. In parallel β2-microglobulin (β2M) and uric acid (UA) were evaluated. We then explored the impact of age and residual kidney function on uremic toxin levels and %PB using analysis of covariance and Spearman correlation coefficients (). We found higher levels of β2M, p-cresyl glucuronide (pCG), hippuric acid (HA), indole acetic acid (IAA), and indoxyl sulfate (IxS) in the HD compared to the CKD4-5 group. In the HD group, a positive correlation between age and pCG, HA, IxS, and pCS levels was shown. Residual urine volume was negatively correlated with levels of β2M, pCG, HA, IAA, IxS, and CMPF ( -0.2 to -0.5). In addition, we found overall lower %PB of PBUTs in HD versus the CKD4-5 group, and showed an age-dependent increase in %PB of IAA, IxS, and pCS. Furhtermore, residual kidney function was overall positively correlated with %PB of PBUTs. In conclusion, residual kidney function and age contribute to PBUT levels and %PB in the pediatric HD population.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6521157 | PMC |
| http://dx.doi.org/10.3390/toxins11040235 | DOI Listing |
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