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  • Title: Auditory brainstem response and unbound bilirubin in jaundiced (jj) Gunn rat pups.
    Author: Ahlfors CE, Shapiro SM.
    Journal: Biol Neonate; 2001 Aug; 80(2):158-62. PubMed ID: 11509817.
    Abstract:
    The role of plasma bilirubin-albumin binding in the pathogenesis of kernicterus in human newborns is controversial. Kernicterus in the jaundiced (jj) Gunn rat pup, an animal model for kernicterus, prolongs interwave intervals and decreases wave amplitude in the auditory brainstem response (ABR). Plasma total bilirubin concentration (TBC), albumin concentration, and unbound bilirubin concentration (UBC), a measure of bilirubin-albumin binding, were measured in 16-day-old jj Gunn rat pups (n = 21) and compared with ABR wave latencies, interwave intervals, and wave amplitudes by linear correlation. The UBC, but not the TBC or TBC/albumin ratio, correlated positively and significantly with ABR I-II and I-III interwave intervals (r = 0.55, p = 0.009, and r = 0.60, p = 0.004, respectively). The UBC, but not the TBC or TBC/albumin ratio, predicts bilirubin toxicity, as measured by bilirubin-induced ABR changes in jj Gunn rat pups.
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