PMID- 6543363 OWN - NLM STAT- MEDLINE DCOM- 19850516 LR - 20190511 IS - 0021-924X (Print) IS - 0021-924X (Linking) VI - 96 IP - 6 DP - 1984 Dec TI - Penetration of bilirubin into the brain in albumin-deficient and jaundiced rats (AJR) and Nagase analbuminemic rats (NAR). PG - 1705-12 AB - An albumin-deficient and jaundiced strain of rats (AJR) was established by crossing Nagase analbuminemic rats (NAR) with jaundiced Gunn rats. AJR have no serum albumin and die with kernicterus within 3 weeks after birth. Their serum bilirubin level was 25 per cent (20 micrograms/ml) of that of Gunn rats at 1-2 weeks of age, while their brain bilirubin content was 1.2-2.7 times (4-5 micrograms/g brain) that of Gunn rats. Binding of bilirubin to NAR plasma proteins was examined. The bilirubin binding protein in NAR plasma was found to be lipoprotein, showing an association constant of 6.7 X 10(6) M-1. Bilirubin-transport into the brain of postnatal NAR was investigated by intravenous infusion of bilirubin with taurocholate. The brain bilirubin level of NAR infused with free bilirubin was 1.6 times that of normal rats. In NAR, the brain level on infusion of lipoprotein-bound bilirubin was similar to that on infusion of free bilirubin, but albumin-bound bilirubin scarcely entered the brain. These findings suggest that lipoprotein-bound bilirubin can diffuse across the blood-brain barrier into the brain. FAU - Takahashi, M AU - Takahashi M FAU - Sugiyama, K AU - Sugiyama K FAU - Shumiya, S AU - Shumiya S FAU - Nagase, S AU - Nagase S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Biochem JT - Journal of biochemistry JID - 0376600 RN - 0 (Albumins) RN - 0 (Carrier Proteins) RN - 0 (Lipoproteins) RN - 0 (bilirubin binding protein, human) RN - 0 (bilirubin binding protein, rat) RN - RFM9X3LJ49 (Bilirubin) SB - IM MH - Aging MH - Albumins/*deficiency MH - Animals MH - Bilirubin/blood/*metabolism MH - Blood-Brain Barrier MH - Brain/*metabolism MH - Carrier Proteins/blood MH - Chromatography, Gel MH - Humans MH - Jaundice/*metabolism MH - Kernicterus/etiology MH - Lipoproteins/metabolism MH - Protein Binding MH - Rats MH - Rats, Gunn MH - Rats, Inbred Strains EDAT- 1984/12/01 00:00 MHDA- 1984/12/01 00:01 CRDT- 1984/12/01 00:00 PHST- 1984/12/01 00:00 [pubmed] PHST- 1984/12/01 00:01 [medline] PHST- 1984/12/01 00:00 [entrez] AID - 10.1093/oxfordjournals.jbchem.a135003 [doi] PST - ppublish SO - J Biochem. 1984 Dec;96(6):1705-12. doi: 10.1093/oxfordjournals.jbchem.a135003.