Unbound Bilirubin: A Better Predictor of Kernicterus?
نویسندگان
چکیده
منابع مشابه
Unbound bilirubin: a better predictor of kernicterus?
The peroxidase method described in this paper measures non–protein-bound bilirubin by oxidation of the free fraction. The oxidation rate is slow compared with rapid dissociation of albumin-bound bilirubin. Thus, the unbound bilirubin can be estimated from the initial rate of decline in total bilirubin concentration. In the 1970s, severe neonatal hyperbilirubinemia and kernicterus were major cli...
متن کاملStudies in kernicterus. I. The protein binding of bilirubin.
The yellow staining of basal ganglia (kernicterus) in some jaundiced newborn infants has been recognized for many years (1). The association between serum bilirubin concentration and kernicterus (2, 3), the isolation of bilirubin from kernicteric brains (4, 5), and the toxic effect of bilirubin in vitro upon oxygen uptake (6) and oxidative phosphorylation (7) are further evidence of a relations...
متن کاملDetermination of unbound bilirubin in the serum of newborns.
An enzymatic assay is described for non-albuminbound bilirubin in the serum of newborn infants. Unbound bilirubin is oxidized to colorless compounds by ethyl hydroperoxide in the presence of horseradish peroxidase (EC 1.11.1.7), while albumin-bound bilirubin is protected from oxidation. Because the equilibrium between albumin and bilirubin occurs rapidly, the oxidation step is rate limiting, an...
متن کاملFluorescence sensor for the quantification of unbound bilirubin concentrations.
BACKGROUND Hyperbilirubinemia in jaundiced neonates is routinely assessed by use of total serum bilirubin. However, the unbound or free form (B(f)), not total bilirubin, crosses the blood-brain barrier and can be neurotoxic. Although the peroxidase-mediated oxidation of bilirubin can be used to measure plasma concentrations of B(f), this measurement is relatively complex and the assay is not ro...
متن کاملUnbound (free) bilirubin: improving the paradigm for evaluating neonatal jaundice.
BACKGROUND The serum or plasma total bilirubin concentration (B(T)) has long been the standard clinical laboratory test for evaluating neonatal jaundice, despite studies showing that B(T) correlates poorly with acute bilirubin encephalopathy (ABE) and its sequelae including death, classical kernicterus, or bilirubin-induced neurological dysfunction (BIND). The poor correlation between B(T) and ...
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ژورنال
عنوان ژورنال: Clinical Chemistry
سال: 2008
ISSN: 0009-9147,1530-8561
DOI: 10.1373/clinchem.2007.098319