Abstract
Background: Modulation of inflammatory signaling has been elucidated in several disease models. Acrolein, an environmental pollutant, has been linked to diseases such as atherosclerosis and to the inflammatory process involving nuclear factor κB (NFκB). Serum response factor (SRF), a transcription factor, regulates cell development, differentiation and proliferation through signaling molecules such as extracellular signal-regulated kinase 1/2 (ERK1/2) and CD36. We hypothesized that acrolein toxicity involves SRF in the process of activating NFκB and may involve CD36/ERK1/2.
Methods: Vascular smooth muscle cells (VSMCs) were exposed to acrolein (0.5 μg/mL) in the presence or absence of 10 nM QNZ (NFκB inhibitor), 300 nM CCG1423 (SRF inhibitor) and 50 μM PD98059 (ERK1/2 inhibitor). Protein and RNA were isolated. Changes in expression were determined by Western blot and polymerase chain reaction (PCR) array.
Results: Subtoxic doses of acrolein increased ERK1/2, SRF and NFκB protein expression, whereas CD36 expression was unchanged. Increase in NFκB expression was accompanied by an increase in activity. ERK1/2 inhibition only blunted SRF expression. SRF inhibition blunted NFκB expression but not that of ERK1/2. CD36 expression was unchanged in the presence of either inhibitor. PCR array analysis indicated up-regulation of nine genes (>4- to 50-fold) and down-regulation of six genes (>4- to 12-fold) involved in inflammatory signaling.
Conclusions: We propose that SRF is required in acrolein activation of NFκB and is ERK1/2 dependent.
References
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©2013 by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
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- Acrolein-induced inflammatory signaling in vascular smooth muscle cells requires activation of serum response factor (SRF) and NFκB
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- Toxicological evaluations of methanolic extract of Moringa oleifera leaves in liver and kidney of male Wistar rats
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Articles in the same Issue
- Masthead
- Masthead
- Review
- Heat: not black, not white. It’s gray!!!
- Original Articles
- Distribution of performance-related gene polymorphisms (ACTN3 R577X and ACE ID) in different ethnic groups of the Indian Army
- Birth month and longevity: birth month of victims of sudden (SCD, ≤1 h) and rapid (RCD, ≤24 h) cardiac deaths
- Hyperpolarization-activated cyclic nucleotide-gated 2 (HCN2) polymorphism is associated with chronic inflammatory periodontitis. A cross-sectional study
- The effect of coadministration of α-tocopherol and ascorbic acid on arsenic trioxide-induced testicular toxicity in adult rats
- Effect of acute immobilization stress with or without a heme oxygenase inducer on testicular structure and function in male albino rats
- Effect of Jobelyn® on intruder- and isolation-induced aggressive behavior in mice
- Dichloroacetate at therapeutic concentration alters glucose metabolism and induces regulatory T-cell differentiation in alloreactive human lymphocytes
- Antinociceptive, anti-inflammatory and antiulcerogenic activities of ethanol root extract of Strophanthus hispidus DC (Apocynaceae)
- Acrolein-induced inflammatory signaling in vascular smooth muscle cells requires activation of serum response factor (SRF) and NFκB
- Nephroprotective activity of Cocculus hirsutus leaf extract in 5/6 nephrectomized rat model
- Toxicological evaluations of methanolic extract of Moringa oleifera leaves in liver and kidney of male Wistar rats
- Nevirapine induces testicular toxicity in Wistar rats: reversal effect of kolaviron (biflavonoid from Garcinia kola seeds)
- Toxicity of Chevron Escravos crude oil and chemical dispersant on guinea pig testicular function
- Jobelyn® pretreatment ameliorates symptoms of psychosis in experimental models