Abstract:
:Low density lipoprotein (LDL) is readily oxidized under certain conditions, resulting in the formation of oxidized LDL (oxLDL). Despite numerous in vitro reports that reveal the pathogenic role of oxidative stress, anti-oxidative strategies have underperformed in the clinic. In this study, we examine the role of oxLDL in brain inflammatory responses using cultured rat brain microglia. We demonstrate that oxLDL inhibits lipopolysaccharide (LPS)-induced inflammatory responses in these cells. It also decreases LPS-induced expression of inducible nitric oxide synthase and production of nitric oxide, and reduces LPS-induced secretion of tumor necrosis factor-alpha and monocyte chemoattractant protein-1. Oxysterols, known components of oxLDL and endogenous agonists of liver X receptor, can simulate the inhibitory effects of oxLDL in LPS-activated microglia. In addition, their inhibitory effects were mimicked by liver X receptor (LXR) agonists and potentiated by a retinoid X receptor agonist, suggesting these molecules heterodimerize to function as oxysterol receptors. Taken together, our results demonstrate that oxLDL inhibits LPS-induced inflammatory responses in brain microglia and that these inhibitory effects are mediated by oxysterols and, at least in part, by the nuclear receptor LXR. Our results suggest an additional mechanism of action for oxidative stress that acts indirectly via modulation of inflammatory responses. Although further studies are needed, these results answer in part the question of why anti-oxidative strategies have not been successful in clinical situations. Moreover, as brain inflammation participates in the initiation and progression of several neurodegenerative disorders, the present data provide information that should prove a useful guide for designing therapeutic strategies to combat oxidative brain diseases.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Kim OS,Lee CS,Joe EH,Jou Idoi
10.1016/j.bbrc.2006.01.107subject
Has Abstractpub_date
2006-03-31 00:00:00pages
9-18issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(06)00169-0journal_volume
342pub_type
杂志文章abstract::In T lymphocyte, activation of Kv1.3 channel, the major voltage-dependent K(+) channel, is an essential step for cell proliferation in immune responses. Here, effects of anti-CD3 and anti-CD28 antibodies on Kv1.3 current were examined in three types of human T lymphocyte derived cell lines, Jurkat E6-1, p56lck-kinase ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2008.06.118
更新日期:2008-09-12 00:00:00
abstract::Multi electrode arrays (MEAs) are increasingly used to detect external field potentials in electrically active cells. Recently, in combination with cardiomyocytes derived from human (induced) pluripotent stem cells they have started to become a preferred tool to examine newly developed drugs for potential cardiac toxi...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2017.01.151
更新日期:2018-03-18 00:00:00
abstract::Macrophage colony stimulating factor (CSF-1) is a member of a family of glycoproteins that are necessary for the normal proliferation and differentiation of myeloid progenitor cells. The human CSF-1 gene has previously been assigned to chromosome 5 using somatic cell hybrids, and further localized to 5q33 by in situ h...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(92)91850-p
更新日期:1992-02-14 00:00:00
abstract::RAB3A interacting protein (Rab3IP) has been determined to be involved in cancer progression; however, its expression pattern and function in gastric cancer remain unknown. The aim of this study was to determine the association between Rab3IP and gastric cancer, in addition to its functional role in this disease. Overe...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2018.07.016
更新日期:2018-09-18 00:00:00
abstract::Protein phosphorylation plays critical roles in the regulation of protein activity and cell signaling. The level of protein phosphorylation is controlled by protein kinases and protein tyrosine phosphatases (PTPs). Disturbance of the equilibrium between protein kinase and PTP activities results in abnormal protein pho...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2009.07.127
更新日期:2009-10-02 00:00:00
abstract::The induction of human BiP/GRP78 and GAPDH protein genes by the calcium ionophore A23187 was determined. Steady-state levels of mRNA for both the glucose starvation-responsive BiP/GRP78 gene and the glucose-responsive GAPDH gene were dramatically induced in a variety of human cells. There is a homologous palindromatic...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(90)91411-k
更新日期:1990-08-31 00:00:00
abstract::The secreted isoform of fibroblast growth factor 3 (FGF3) induces a mitogenic cell response, while the nuclear form inhibits cell proliferation. Recently, we identified a nucleolar FGF3-binding protein which is implicated in processing of pre-rRNA as a possible target of nuclear FGF3 signalling. Here, we report a seco...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2005.10.079
更新日期:2005-12-16 00:00:00
abstract::We have cloned and functionally expressed a sodium-dependent human nucleoside transporter, hCNT2, from a CNS cancer cell line U251. Our cDNA clone of hCNT2 had the same predicted amino acid sequence as the previously cloned hCNT2 transporter. Of the several cell lines studied, the best hCNT2 transport function was obt...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(03)01259-2
更新日期:2003-08-01 00:00:00
abstract::5-Lipoxygenase (5LO) catalyzes two steps in the biosynthesis of leukotrienes (LTs), lipid mediators of inflammation derived from arachidonic acid. LTs function in normal host defense, and have pathophysiological roles in chronic inflammatory diseases as asthma and atherosclerosis. Also, possible effects of 5LO product...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章,评审
doi:10.1016/j.bbrc.2010.02.173
更新日期:2010-05-21 00:00:00
abstract::The primary structure of the major hemoglobin component, HbA (alpha(A)- and beta-chain), from Tufted duck (Aythya fuligula) is presented. The separation of the globin subunits was achieved by ion exchange chromatography on CM-cellulose in 8 M urea. The amino acid sequence was determined by automatic Edman degradation ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2002.6399
更新日期:2002-02-15 00:00:00
abstract::Discoidin domain receptor 2 (DDR2) is a receptor tyrosine kinase that is activated by fibrillar collagens. DDR2 regulates cell proliferation, cell adhesion, migration, and extracellular matrix remodeling. The decrement of endogenous DDR2 represses osteoblastic marker gene expression and osteogenic differentiation in m...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.09.106
更新日期:2012-10-26 00:00:00
abstract::The present study revealed that low density lipoprotein (LDL) obtained from rabbits fed highly purified eicosapentaenoic acid-ethyl ester (EPA-E) (EPA-LDL) was significantly less susceptible to oxidative modification catalyzed by Cu2+ as compared to LDL from rabbits fed a normal diet (control LDL). In a comparison of ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(05)81200-8
更新日期:1991-02-28 00:00:00
abstract::Experiments of molecular hybridization were carried out with the aim of singling out DNA sequences which might be important in the hepatocarcinogenic action of N-methyl-N-nitrosourea. Results were obtained suggesting the synthesis of transitory DNA sequences during compensatory cell proliferation. ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1995.1367
更新日期:1995-03-17 00:00:00
abstract::Multidrug resistance protein 4 (MRP4) is a member of subfamily C of the ATP-binding cassette superfamily of membrane transport proteins. MRP4 mediates the ATP-dependent efflux of many endogenous and exogenous solutes across the plasma membrane, and in polarized cells, it localizes to the apical or basolateral plasma m...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2015.12.095
更新日期:2016-01-22 00:00:00
abstract::The heat shock response is known to inhibit NF-kappaB activation and NF-kappaB-dependent gene expression. Herein we determined if cells lacking heat shock factor-1 (HSF-1), the major transcription factor regulating heat shock protein gene expression, have an altered ability to modulate NF-kappaB activation. Embryonic ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2002.6470
更新日期:2002-03-01 00:00:00
abstract::One point mutation which converts glycine-317 to aspartate of tissue-nonspecific alkaline phosphatase (TNSALP) was reported to be associated with lethal hypophosphatasia (Greenberg, C. R., et al. Genomics 17, 215-217, 1993). In order to define the molecular defect of TNSALP underlying the pathogenesis of hypophosphata...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1998.8674
更新日期:1998-05-29 00:00:00
abstract::Mesenchymal Stem Cells are known to engraft and integrate into the architecture of colorectal tumours, with little known regarding their fate following engraftment. This study aimed to investigate mediators of Mesenchymal Stem Cell (MSC) and colon cancer cell (CCC) interactions. Mesenchymal Stem Cells and colon cancer...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2013.05.013
更新日期:2013-06-14 00:00:00
abstract::Thioredoxin-interacting protein (TXNIP) emerges as a central regulator for glucose homeostasis, which goes awry in diabetic subjects. Endothelial dysfunction is considered the earliest detectable stage of cardiovascular disease (CVD), a major complication of diabetes. Here, we hypothesize that TXNIP may promote endoth...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2017.09.028
更新日期:2017-11-04 00:00:00
abstract::Glycogen storage disease type Ia (GSD-Ia) is caused by a deficiency in glucose-6-phosphatase-α (G6Pase-α or G6PC), a key enzyme in endogenous glucose production. This autosomal recessive disorder is characterized by impaired glucose homeostasis and long-term complications of hepatocellular adenoma/carcinoma (HCA/HCC)....
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2018.03.083
更新日期:2018-04-15 00:00:00
abstract:BACKGROUND/AIMS:We have previously reported that the application of sphingomyelin-based liposomes (SM-L) to a three-dimensional cultured skin model increase the content of ceramides NS, NP, AS and AP. However, the mechanism responsible for these increased ceramide levels was not identified. METHODS:SM-L and sphingomye...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2016.03.061
更新日期:2016-04-22 00:00:00
abstract::Interleukin (IL)-18 bioactivity and dsRNA sensing by receptors of innate immunity are key components of anti-viral host defense. Despite extensive data on signal transduction activated by both pathways knowledge on cross-communication is incomplete. By using human PBMC and predendritic KG1 cells, as prototypic IL-18-r...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2009.09.040
更新日期:2009-11-27 00:00:00
abstract::Stomatal movements are regulated by alternate phase transition in the lipophilic domains of membrane initiated by blue light through activation of plasmalemma redox system. ABA blocks the blue light activated redox reactions leading to the accumulation of superoxide (O2.-) radical inducing melting of the membrane and ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1994.2625
更新日期:1994-11-30 00:00:00
abstract::The CCAAT/enhancer binding proteins (C/EBPs) and the peroxisome proliferator-activated receptors (PPARs) together regulate adipogenesis. The current work uses co-transfection studies to examine the C/ EBP dependence of PPAR gamma 2 transcription. Both C/ EBP alpha and C/EBP delta expression vectors activated transcrip...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1997.7627
更新日期:1997-11-07 00:00:00
abstract::Here we established a unique human glial cell line, GDC90, derived from a human glioma and demonstrated its utility as a glial scaffold for the polarization and differentiation of human induced pluripotent stem cell-derived neural progenitor cells (iPSC-NPCs). When co-cultured with GDC90 cells, iPSC-NPCs underwent rap...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2014.04.070
更新日期:2014-05-16 00:00:00
abstract::We have partially characterized the properties of a specific acetylhydrolase in plasma from spontaneous hypertensive rats. This enzyme inactivates 1-alkyl-2-acetyl-sn-glycero-3-phosphocholine (a lipid involved in platelet aggregating, hypotensive, and allergic responses) by removal of the acetate group. The extent of ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(83)91778-3
更新日期:1983-06-15 00:00:00
abstract::Although the neuron-restrictive silencer element (NRSE/Regard) has been shown to function as a negative-acting DNA regulatory element to prevent the expression of neuron-specific genes in non-neuronal cells, little is known about its silencing effect on transcription in primary glial cells nor its effect on transcript...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1999.0974
更新日期:1999-08-02 00:00:00
abstract::We tested usefulness of a target enrichment system SureSelect, a comprehensive viral nucleic acid detection method, for rapid identification of viral pathogens in feces samples of cattle, pigs and goats. This system enriches nucleic acids of target viruses in clinical/field samples by using a library of biotinylated R...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2017.12.017
更新日期:2018-01-08 00:00:00
abstract::Many calmodulin-dependent biological phenomena are regulated by calmodulin-dependent phosphorylation and dephosphorylation. In Dictyostelium discoideum, cell and pronuclear fusion during fertilization are both calmodulin-dependent biomembrane fusion events. Calmodulin-dependent phosphorylation and dephosphorylation ac...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1993.1526
更新日期:1993-05-14 00:00:00
abstract::Allelic variants of the genes for chemokine receptors and their natural ligands, the chemokines, and cytokines can affect HIV-1 disease progression. This study investigates the level of expression of the CCR5-Delta32, CCR2b-641, RANTES In1.1C, SDF-1 3'A, IL-10-5'-592A and IL-4-589T alleles in two unique HIV-1 infected...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2010.04.095
更新日期:2010-05-28 00:00:00
abstract::Cultured endothelial cells release a potent vasoconstrictor peptide, endothelin. Cumulative addition of synthetic endothelin to isolated rabbit aortic rings elicited a concentration-dependent increase in contractile tension which was endothelium-independent. In cultured rabbit vascular smooth muscle cells loaded with ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(89)80180-9
更新日期:1989-01-16 00:00:00