Abstract
Multiple single-center studies have examined the progression of kidney function biomarkers such as serum cystatin C (Cys C) in the first 30 days of life (DOL) after preterm birth, but from different ethnicities and in different gestational ages (GA), without a functional summary available. We performed a systematic literature review within PubMed, Google Scholar, and Scopus, with additional use of the snowballing method to find studies including data on serum Cys C concentrations in the first 30 DOL. We identified 15 papers that met criteria, published from 2000 to 2019, from 10 countries across 4 continents, in 1468 babies born preterm. Cys C was superior to creatinine in 11/13 studies, and equal in 2/13. For infants born at 24–28 weeks GA, the DOL1 Cys C concentrations ranged from 1.44 to 1.90 mg/L, from 1.20 to 1.77 on DOL3, and from 1.36 to 2.02 between DOL 4 and 30. For infants born at 29–33 weeks GA, the DOL1 Cys C values ranged from 1.41 to 1.96 mg/L, from 1.28 to 1.70 on DOL3, and 1.51 to 1.87 between DOL 4 and 30. For preterm infants born after 34 weeks GA, the DOL1 Cys C values ranged from 1.22 to 1.96 mg/L, from 1.24 to 1.85 on DOL3, and 1.22 to 1.82 between DOL 4 and 30. This systematic review provides generalizable worldwide reference data on Cys C that could be used to estimate progression or resolution of abnormal kidney function in the first months after preterm birth, stratified by GA.
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PIT is a member of the Scientific Advisory Board of, and a consultant to, MediBeacon Inc., and a potential recipient of royalty income from a patent assigned to MediBeacon. These efforts relate to MediBeacon’s work on a test for intestinal permeability and not to their technology relevant to determining glomerular filtration rates. He is also a consultant to Takeda Pharmaceuticals in the topic area of childhood intestinal disorders.
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Renganathan, A., Warner, B.B., Tarr, P.I. et al. The progression of serum cystatin C concentrations within the first month of life after preterm birth—a worldwide systematic review. Pediatr Nephrol 36, 1709–1718 (2021). https://doi.org/10.1007/s00467-020-04543-1
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DOI: https://doi.org/10.1007/s00467-020-04543-1