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Articles 31 - 35 of 35
Full-Text Articles in Molecular Biology
Identification Of Fatty Acid Oxidation Disorder Patients With Lowered Acyl-Coa Thioesterase Activity In Human Skin Fibroblasts, Mary Hunt, Jos Ruiter, Petra Mooyer, Carlo W T Van Roermond, Rob Ofman, Lodewig Ijlst, Ronald J A Wanders
Identification Of Fatty Acid Oxidation Disorder Patients With Lowered Acyl-Coa Thioesterase Activity In Human Skin Fibroblasts, Mary Hunt, Jos Ruiter, Petra Mooyer, Carlo W T Van Roermond, Rob Ofman, Lodewig Ijlst, Ronald J A Wanders
Articles
Background: Acyl-CoA thioesterases are enzymes that hydrolyze acyl-CoAs to the free fatty acid and coenzyme A (CoASH). These enzymes have been identified in several cellular compartments and are thought to regulate intracellular levels of acyl-CoAs, free fatty acids and CoASH. However, to date no patients deficient in acyl-CoA thioesterases have been identified. Design: Acyl-CoA thioesterase activity was measured in human skin fibroblasts. Western blot analysis was used to determine Type-II acyl-CoA thioesterase protein levels in patients. Results: Activity was found in human fibroblasts with all saturated acyl-CoAs from C4:0- to C18:0-CoA, with highest activity detected with lauroyl-CoA and myristoyl-CoA (C12:0 …
Isolation Of Cancer Stem Cells From Adult Glioblastoma Multiforme, Xianpeng Yuan, James Curtin, Yizhi Xiong, Gentao Liu, Sebastian Waschsmann-Hogiu, Daniel Farkas, Keith Black, John Yu
Isolation Of Cancer Stem Cells From Adult Glioblastoma Multiforme, Xianpeng Yuan, James Curtin, Yizhi Xiong, Gentao Liu, Sebastian Waschsmann-Hogiu, Daniel Farkas, Keith Black, John Yu
Articles
Glioblastoma multiforme (GBM) is the most common adult primary brain tumor and is comprised of a heterogeneous population of cells. It is unclear which cells within the tumor mass are responsible for tumor initiation and maintenance. In this study, we report that brain tumor stem cells can be identified from adult GBMs. These tumor stem cells form neurospheres, possess the capacity for self-renewal, express genes associated with neural stem cells (NSCs), generate daughter cells of different phenotypes from one mother cell, and differentiate into the phenotypically diverse populations of cells similar to those present in the initial GBM. Having a …
Molecular Cloning And Characterization Of Two Mouse Peroxisome Proliferator-Activated Receptor Alpha (Ppara) Regulated Peroxisomal Acyl-Coa Thioesterases., Maria Westin, Mary Hunt, Stefan Alexson
Molecular Cloning And Characterization Of Two Mouse Peroxisome Proliferator-Activated Receptor Alpha (Ppara) Regulated Peroxisomal Acyl-Coa Thioesterases., Maria Westin, Mary Hunt, Stefan Alexson
Articles
Peroxisomes are organelles that function in the b-oxidation of very-long and long-chain acyl-CoAs, bile acid-CoA intermediates, prostaglandins, leukotrienes, thromboxanes, dicarboxylic fatty acids, pristanic acid and xenobiotic carboxylic acids. The very long- and long-chain acyl-CoAs are mainly chain-shortened and then transported to mitochondria for further metabolism. We have now identified and characterized two peroxisomal acyl- CoA thioesterases, named PTE-Ia and PTE-Ic, which hydrolyze acyl-CoAs to the free fatty acid and coenzyme A. PTE-Ia and PTE-Ic show 82% sequence identity at amino acid level and a putative peroxisomal type 1 targeting signal of –AKL was identified at the carboxy-terminal end of both …
Characterization Of An Acyl-Coa Thioesterase That Functions As A Major Regulator Of Peroxisomal Lipid Metabolism, Mary Hunt, Karianne Solaas, Bengt F. Kase, Stefan E H Alexson
Characterization Of An Acyl-Coa Thioesterase That Functions As A Major Regulator Of Peroxisomal Lipid Metabolism, Mary Hunt, Karianne Solaas, Bengt F. Kase, Stefan E H Alexson
Articles
Peroxisomes function in b-oxidation of very long- and long-chain fatty acids, dicarboxylic fatty acids, bile acid intermediates, prostaglandins, leukotrienes, thromboxanes, pristanic acid and xenobiotic carboxylic acids. These lipids are mainly chain-shortened for excretion as the carboxylic acids or transported to mitochondria for further metabolism. Several of these carboxylic acids are slowly oxidized and may therefore sequester coenzyme A (CoASH). To prevent CoASH sequestration and to facilitate excretion of chain-shortened carboxylic acids, acyl-CoA thioesterases, which catalyze the hydrolysis of acyl-CoAs to the free acid and CoASH, may play important roles. We have here cloned and characterized a peroxisomal acyl-CoA thioesterase from …
The Peroxisome Proliferator-Activated Receptor Alpha (Ppar ) Regulates Bile Acid Biosynthesis., Mary Hunt, Yi-Zeng Yang, Gosta Eggertsen, Claes Carneheim, Mats Gafvels, Curt Einarsson, Stefan Alexson
The Peroxisome Proliferator-Activated Receptor Alpha (Ppar ) Regulates Bile Acid Biosynthesis., Mary Hunt, Yi-Zeng Yang, Gosta Eggertsen, Claes Carneheim, Mats Gafvels, Curt Einarsson, Stefan Alexson
Articles
Fibrates are a group of hypolipidemic agents which efficiently lower serum triglyceride levels by affecting the expression of many genes involved in lipid metabolism. These effects are exerted via the peroxisome proliferator-activated receptor alpha (PPARa). In addition, fibrates also lower serum cholesterol levels, suggesting a possible link between the PPARa and cholesterol metabolism. Bile acid formation represents an important pathway for elimination of cholesterol, and the sterol 12a-hydroxylase is a branch-point enzyme in the bile acid biosynthetic pathway, which determines the ratio of cholic acid to chenodeoxycholic acid. Treatment of mice for one week with the peroxisome proliferator WY-14,643 or …