PMID- 1639819 OWN - NLM STAT- MEDLINE DCOM- 19920828 LR - 20210210 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 267 IP - 22 DP - 1992 Aug 5 TI - Deficiencies in sex-regulated expression and levels of two hepatic sterol carrier proteins in a murine model of Niemann-Pick type C disease. PG - 15902-8 AB - Hepatic sterol carrier protein-2 (SCP2) and sterol carrier protein-X (SCPx) levels in normal and in mutant Niemann-Pick Type C mice were determined by immunoblotting with antiserum against rat SCP2. A 14-kDa protein (SCP2) was detected in the cytosol fraction and a 58-kDa protein (SCPx) was found in both cytosolic and organellar fractions. Expression of hepatic SCPx protein was developmentally regulated in a sex-specific pattern. The amounts of organelle-associated SCPx increased 4-fold during sexual development of normal males but decreased dramatically during development of normal females. Levels of hepatic SCP2 increased much less dramatically during sexual maturation of normal males and females. Adult Niemann-Pick Type C mice were deficient in both hepatic SCPx and SCP2. The deficit in SCPx in affected males reflected a failure to increase hepatic SCPx levels during sexual maturation. In affected males SCPx remained at levels found in immature mice. Affected male and female mice were also unable to maintain levels of hepatic SCP2. The level of SCP2 was near normal in affected immature males and subnormal in affected immature females. During sexual maturation hepatic SCP2 declined in affected animals. FAU - Roff, C F AU - Roff CF AD - Developmental and Metabolic Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892. FAU - Pastuszyn, A AU - Pastuszyn A FAU - Strauss, J F 3rd AU - Strauss JF 3rd FAU - Billheimer, J T AU - Billheimer JT FAU - Vanier, M T AU - Vanier MT FAU - Brady, R O AU - Brady RO FAU - Scallen, T J AU - Scallen TJ FAU - Pentchev, P G AU - Pentchev PG LA - eng GR - DK-10628/DK/NIDDK NIH HHS/United States GR - HD-06274/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Carrier Proteins) RN - 0 (Plant Proteins) RN - 0 (Sterols) RN - 0 (sterol carrier proteins) RN - EC 1.11.1.6 (Catalase) SB - IM MH - Aging MH - Animals MH - Carrier Proteins/genetics/*metabolism MH - Catalase/metabolism MH - Cytosol/metabolism MH - Female MH - Gene Expression Regulation MH - Liver/growth & development/*metabolism MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Molecular Weight MH - Niemann-Pick Diseases/genetics/*metabolism MH - Organelles/metabolism MH - *Plant Proteins MH - Sex Characteristics MH - Sterols/*metabolism EDAT- 1992/08/05 00:00 MHDA- 1992/08/05 00:01 CRDT- 1992/08/05 00:00 PHST- 1992/08/05 00:00 [pubmed] PHST- 1992/08/05 00:01 [medline] PHST- 1992/08/05 00:00 [entrez] AID - S0021-9258(19)49619-1 [pii] PST - ppublish SO - J Biol Chem. 1992 Aug 5;267(22):15902-8.