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A series of prenyl hydroquinone derivatives synthesized as structural analogs of marine products were tested for their effects on inflammatory responses in vitro and in vivo. 2-Prenyl-1,4-hydroquinone (H1), 2-diprenyl-1,4-hydroquinone (H2), 2-triprenyl-1,4-hydroquinone (H3) and
Previous studies have shown that treatment of bone marrow (BM) cells with interleukin-1 beta (IL-1 beta) or tumor necrosis factor-alpha (TNF-alpha) can protect hematopoietic progenitor cells (HPC) from the toxic effects of 4-hydroperoxycyclophosphamide (4HC) or gamma-irradiation. Since doxorubicin
Remoxipride is an atypical antipsychotic displaying selective binding to the dopamine D2 receptor. Several cases of aplastic anemia led to the withdrawal of remoxipride from the market in December 1993. The remoxipride metabolite NCQ-344 is a hydroquinone while the structural isomer NCQ-436 is a
Administration of 2-bromo-(diglutathion-S-yl)hydroquinone (2-Br-[diGSyl]HQ) (10-30 mumol/kg; i.v.) to rats causes severe renal proximal tubular necrosis. gamma-Glutamyl transpeptidase (gamma-GT) catalyses the first step in the metabolism of glutathione (GSH) and its S-conjugates and the toxicity of
Hydroquinone, an intermediate used in the chemical industry and a metabolite of benzene, is a nephrocarcinogen in the 2-year National Toxicology Program bioassay in male Fischer 344 rats. Current evidence suggests that certain chemicals may induce carcinogenesis by a mechanism involving
Early subcellular targets of 2-Br-(diglutathion-S-yl)hydroquinone (2-Br-(diGSyl)HQ)-mediated nephrotoxicity were investigated by morphological and biochemical criteria. After treatment of male Fischer 344 rats with 2-Br-(diGSyl)HQ (30 mumol/kg), proximal tubular morphology was examined by electron
Hydroquinone is a toxic compound and a major benzene metabolite. We report that it strongly inhibits the activation of macrophages and associated cells. Thus, it suppressed the production of proinflammatory cytokines [tumor necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-3, IL-6, IL-10,
Suppression of hematopoiesis is an important mechanism governing blood cell formation. Factors such as tumor necrosis factor alpha (TNF-alpha) inhibit proliferation and colony-forming activity of bone marrow cells and activate nuclear factor kappa B (NF-kappaB) in multiple cell types. Activated
Werner syndrome is a progeroid disorder caused by mutations of the WRN gene. The encoded WRN protein belongs to the family of RecQ helicases that plays a role in the maintenance of genomic stability. Single nucleotide polymorphisms in WRN have been associated with an increased risk for some cancers
We investigated the inhibitory effects of hydroquinone on cytokine release, phagocytosis, NO production, ROS generation, cell-cell/cell fibronectin adhesion, and lymphocyte proliferation. We found that hydroquinone suppressed the production of proinflammatory cytokines [tumor necrosis factor
OBJECTIVE
Brimonidine is a selective alpha-2 adrenergic agonist used to reduce intraocular pressure and it has been shown to have some neuroprotective effects. Hydroquinone (HQ) is a toxicant present in cigarette smoke, and other sources. In this study, we investigated the cyto-protective effects in
Hydroquinone impairs several leucocyte cell functions, which alter the immune response. Although endothelial cell functions are important for the development of immune responses, hydroquinone actions on endothelial cell have not been shown. Therefore, the effect of hydroquinone exposure (10 or 100
2-Bromo-(diglutathion-S-yl)hydroquinone [2-Br-(diGSyl)HQ] causes severe necrosis of the proximal renal tubules in the rat, elevations in blood urea nitrogen (BUN) and increased urinary excretion of protein, glucose, and lactate dehydrogenase. In contrast, 2-Br-3-(GSyl)HQ, 2-Br-5-(GSyl)HQ, and
The effect of commonly used food antioxidants on recombinant tumor necrosis factor alpha (rTNF-alpha)-induced cytotoxicity, growth enhancement and adhesion has been evaluated. Butylated hydroxyanisole (BHA) and 4-hydroxymethyl-2,6-di-t-butylphenol (HBP) were the only two of nine antioxidants that
OBJECTIVE
To evaluate the protective effect of amifostine on hydroquinone-induced apoptosis of bone marrow mononuclear cells in vitro.
METHODS
The mononuclear cells were separated and divided into four groups: blank control, amifostine group, hydroquinone group, amifostine + hydroquinone group. The