Microsomal Triglyceride Transfer Protein
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Avaliação do polimorfismo C677T (ALA222VAL) do gene da metilenotetrahidrofolato redutose (MTHFR) da hemocisteína e-493G/T do gene da proteína microssomal transportadora de triglicerídeos (MTP) em pacientes com hepatite C crônica do Nordeste do Brasil / Methylenetetrahydrofolate reductase (MTHFR) C677T (ALA222VAL) polimorphysm and microsomal triglyceride transfer protein (MTP) -493G/T polymorphism in chronic hepatitis C patients from Northeast of Brazil
Introdução: A infecção crônica pelo vírus da hepatite C (VHC) está associada à presença da resistência insulínica e da esteatose hepática, independentemente dos fatores metabólicos do hospedeiro. A alteração na enzima MTHFR resulta em hiperhomocisteinemia, que altera o metabolismo intracelular dos lipídios e pode estar relacionada à esteatos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/09/2011
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2. Structural and functional analysis of VT1 and YP170B vitellins from the Rhabditid nematodes Oscheius tipulae and Caenorhabditis elegans. / Estudo das vitelinas VT1 e YP170B dos nematoides rabditídeos Oscheius tipulae e Caenorhabditis elegans: aspectos estruturais e funcionais.
The N-terminal region of OTI-VIT-1 was expressed and the recombinant polypeptides were purified. OTI-VIT-1 may be homologous to the vitellin YP170B from C. elegans. We identified an intron in the 5 region and two in 3region from Oti-vit-1. Monospecific antisera to PVIT1HisC confirmed that the gene Oti-vit-1 encodes VT1. The recombinant polypeptide P40-H, cor
Publicado em: 2009
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3. An inhibitor of the microsomal triglyceride transfer protein inhibits apoB secretion from HepG2 cells.
The microsomal triglyceride (TG) transfer protein (MTP) is a heterodimeric lipid transfer protein that catalyzes the transport of triglyceride, cholesteryl ester, and phosphatidylcholine between membranes. Previous studies showing that the proximal cause of abetalipoproteinemia is an absence of MTP indicate that MTP function is required for the assembly of t
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4. Secretion of apolipoprotein B-containing lipoproteins from HeLa cells is dependent on expression of the microsomal triglyceride transfer protein and is regulated by lipid availability.
To elucidate the role of the microsomal triglyceride transfer protein (MTP) in lipoprotein assembly, MTP and apolipoprotein B-53 (apoB 53; the N-terminal 53% of apoB) were expressed in HeLa cells. The results showed that apoB-53 could be expressed in HeLa cells with or without expression of MTP. In contrast, efficient secretion of apoB-53 required expression
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5. Apoprotein B100 has a prolonged interaction with the translocon during which its lipidation and translocation change from dependence on the microsomal triglyceride transfer protein to independence
When lipid synthesis is limited in HepG2 cells, apoprotein B100 (apoB100) is not secreted but rapidly degraded by the ubiquitin-proteasome pathway. To investigate apoB100 biosynthesis and secretion further, the physical and functional states of apoB100 destined for either degradation or lipoprotein assembly were studied under conditions in which lipid synthe
The National Academy of Sciences.
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6. Analysis of the role of microsomal triglyceride transfer protein in the liver of tissue-specific knockout mice
A deficiency in microsomal triglyceride transfer protein (MTP) causes the human lipoprotein deficiency syndrome abetalipoproteinemia. However, the role of MTP in the assembly and secretion of VLDL in the liver is not precisely understood. It is not clear, for instance, whether MTP is required to move the bulk of triglycerides into the lumen of the endoplasmi
American Society for Clinical Investigation.
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7. The crayfish plasma clotting protein: A vitellogenin-related protein responsible for clot formation in crustacean blood
Coagulation in crayfish blood is based on the transglutaminase-mediated crosslinking of a specific plasma clotting protein. Here we report the cloning of the subunit of this clotting protein from a crayfish hepatopancreas cDNA library. The ORF encodes a protein of 1,721 amino acids, including a signal peptide of 15 amino acids. Sequence analysis reveals that
The National Academy of Sciences.
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8. Is protein disulfide isomerase a redox-dependent molecular chaperone?
Protein disulfide isomerase (PDI) is a multifunctional protein catalysing the formation of disulfide bonds, acting as a molecular chaperone and being a component of the enzymes prolyl 4-hydroxylase (P4H) and microsomal triglyceride transfer protein. The role of PDI as a molecular chaperone or polypeptide-binding protein is mediated primarily through an inter
Oxford University Press.
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9. Apo B100-containing lipoproteins are secreted by the heart.
The apo B gene is expressed in the human heart and in the hearts of human apo B transgenic mice generated with large genomic clones spanning the human apo B gene. [35S]Methionine metabolic labeling experiments demonstrated that apo B100-containing lipoproteins are secreted by human heart tissue and by human apo B transgenic and nontransgenic mouse heart tiss
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10. Knockout of the abetalipoproteinemia gene in mice: Reduced lipoprotein secretion in heterozygotes and embryonic lethality in homozygotes
Abetalipoproteinemia, an inherited human disease characterized by a near-complete absence of the apolipoprotein (apo) B-containing lipoproteins in the plasma, is caused by mutations in the gene for microsomal triglyceride transfer protein (MTP). We used gene targeting to knock out the mouse MTP gene (Mttp). In heterozygous knockout mice (Mttp+/− ), the MTP
The National Academy of Sciences.
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11. Hepatocyte Nuclear Factor 4α (Nuclear Receptor 2A1) Is Essential for Maintenance of Hepatic Gene Expression and Lipid Homeostasis
The numerous functions of the liver are controlled primarily at the transcriptional level by the concerted actions of a limited number of hepatocyte-enriched transcription factors (hepatocyte nuclear factor 1α [HNF1α], -1β, -3α, -3β, -3γ, -4α, and -6 and members of the c/ebp family). Of these, only HNF4α (nuclear receptor 2A1) and HNF1α appear to be
American Society for Microbiology.
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12. The role of the LDL receptor in apolipoprotein B secretion
Familial hypercholesterolemia is caused by mutations in the LDL receptor gene (Ldlr). Elevated plasma LDL levels result from slower LDL catabolism and a paradoxical lipoprotein overproduction. We explored the relationship between the presence of the LDL receptor and lipoprotein secretion in hepatocytes from both wild-type and LDL receptor–deficient mice. L
American Society for Clinical Investigation.