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ApoE NFAT

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https://www.readbyqxmd.com/read/27321128/phosphodiesterase-3b-pde3b-regulates-nlrp3-inflammasome-in-adipose-tissue
#1
Faiyaz Ahmad, Youn Wook Chung, Yan Tang, Steven C Hockman, Shiwei Liu, Yusuf Khan, Kevin Huo, Eric Billings, Marcelo J Amar, Alan T Remaley, Vincent C Manganiello
Activation of inflammation in white adipose tissue (WAT), includes infiltration/expansion of WAT macrophages, contributes pathogenesis of obesity, insulin resistance, and metabolic syndrome. The inflammasome comprises an intracellular sensor (NLR), caspase-1 and the adaptor ASC. Inflammasome activation leads to maturation of caspase-1 and processing of IL1β, contributing to many metabolic disorders and directing adipocytes to a more insulin-resistant phenotype. Ablation of PDE3B in WAT prevents inflammasome activation by reducing expression of NLRP3, caspase-1, ASC, AIM2, TNFα, IL1β and proinflammatory genes...
2016: Scientific Reports
https://www.readbyqxmd.com/read/26981206/high-levels-of-homocysteine-downregulate-apolipoprotein-e-expression-via-nuclear-factor-kappa-b
#2
Violeta G Trusca, Adina D Mihai, Elena V Fuior, Ioana M Fenyo, Anca V Gafencu
AIM: To investigate the effect of high homocysteine (Hcy) levels on apolipoprotein E (apoE) expression and the signaling pathways involved in this gene regulation. METHODS: Reverse transcriptase polymerase chain reaction (RT-PCR) and Western blot were used to assess apoE expression in cells treated with various concentrations (50-500 μmol/L) of Hcy. Calcium phosphate-transient transfections were performed in HEK-293 and RAW 264.7 cells to evaluate the effect of Hcy on apoE regulatory elements [promoter and distal multienhancer 2 (ME2)]...
February 26, 2016: World Journal of Biological Chemistry
https://www.readbyqxmd.com/read/18691762/the-interleukin-1-receptor-associated-kinase-1-contributes-to-the-regulation-of-nfat
#3
Dongmei Wang, Stephan Fasciano, Liwu Li
IRAK-1 is a critical modulator regulating innate immunity signaling processes. However, the physiological substrates for IRAK-1 remain poorly defined. In this report, we have demonstrated that IRAK-1 is a kinase responsible for the constitutive phosphorylation and inactivation of the Nuclear Factor of Activated T-cell (NFAT). Expression of IRAK-1 suppressed NFAT reporter activity. Correspondingly, the levels of both nuclear NFATc1 and NFATc4 were constitutively elevated in IRAK-1-/- cells. Furthermore, the phosphorylation of NFATc4 at the S168PS170P site was significantly diminished in IRAK-1-/- cells...
September 2008: Molecular Immunology
https://www.readbyqxmd.com/read/15888024/low-dose-fk506-blocks-collar-induced-atherosclerotic-plaque-development-and-stabilizes-plaques-in-apoe-mice
#4
Marjo M P C Donners, Ilze Bot, Leon J De Windt, Theo J C van Berkel, Mat J A P Daemen, Erik A L Biessen, Sylvia Heeneman
Since atherosclerosis is a chronic inflammatory disease, we tested the hypothesis that the immunosuppressive drug FK506 would attenuate the development of atherosclerosis using a mouse model of collar-induced atherosclerosis. ApoE-/- mice were treated for 4 weeks with the immunosuppressive drug FK506 (0.05 mg/kg/day), yielding sustained blood levels (approximately 0.2 ng/mL) without systemic side effects. Atherosclerotic plaque development of FK506-treated mice was significantly reduced (63%) while plaque cell density was increased (52%) compared to controls...
June 2005: American Journal of Transplantation
https://www.readbyqxmd.com/read/10570152/stimulation-of-cd95-fas-blocks-t-lymphocyte-calcium-channels-through-sphingomyelinase-and-sphingolipids
#5
A Lepple-Wienhues, C Belka, T Laun, A Jekle, B Walter, U Wieland, M Welz, L Heil, J Kun, G Busch, M Weller, M Bamberg, E Gulbins, F Lang
Calcium influx through store-operated calcium release-activated calcium channels (CRAC) is required for T cell activation, cytokine synthesis, and proliferation. The CD95 (Apo-1/Fas) receptor plays a role in self-tolerance and tumor immune escape, and it mediates apoptosis in activated T cells. In this paper we show that CD95-stimulation blocks CRAC and Ca(2+) influx in lymphocytes through the activation of acidic sphingomyelinase (ASM) and ceramide release. The block of Ca(2+) entry is lacking in CD95-defective lpr lymphocytes as well as in ASM-defective cells and can be restored by retransfection of ASM...
November 23, 1999: Proceedings of the National Academy of Sciences of the United States of America
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