objective(s): glioblastoma multiforme (gbm) is one of the most lethal forms of human cancer and temozolomide (tmz) is currently part of the standard treatment for this disease. combination therapy using natural substances can enhance the anti-cancer activity of tmz. the purpose of this study was to evaluate the effect of tmz in combination with thymoquinone (tq) on human gbm cell line (u87mg). ...

the present study aims to investigate the effect of noscapine (0.5-2.5 µm), an alkaloid from the opium poppy, on primary murine fetal cortical neurons exposed to oxygen–glucose deprivation (ogd), an in vitro model of ischemia. cells were transferred to glucose-free dmem (dulbecco's modified eagle medium) and were exposed to hypoxia in a small anaerobic chamber. cell viability and nitric ox...

abstract   anthocyanins are natural pigments widely spread in nature. anthocyanin color molecules are a subclass of flavonoids. they are responsible for red, purple, and blue colors of many flowers, fruits and vegetables. fruits and berries are sample sources of anthocyanins in nature. in many researches, the positive effects of fruits and berries intake on human health have been reported. anth...

I have read with interest the comment letter by Kruszelnicka et al. (1) to our article recently published in Diabetes (2). Their letter contains useful observations and raises interesting questions. One is about the dissociation of the metabolic sensitivity to insulin from endothelial nitric oxide (NO) release and its vascular protective effects, and the other is on the specificity of the assay...

Objective(s): Artemisia species are important medicinal plants throughout the world. Some species are traditionally used for their anti-inflammatory effect. The present study was designed to isolate sesquiterpene fractions from several Artemisia species and evaluate their anti-inflammatory activities on key mediators and signaling molecules involved in regulation of in...

BACKGROUND The present study was conducted to investigate the optimized timing for macrophages induction and nitric oxide (NO) production against invading Leishmania parasite. METHODS The present study examined the murine macrophage cell line, B10R, in three different states. In the first state, the cells were first infected with L. major and then treated with IFN-γ and LPS as stimulants. In ...

PURPOSE To investigate the effect of insulin on the production of nitric oxide (NO) in the trabecular meshwork (TM) cells and the enzymatic synthetic pathway of tetrahydrobiopterin (BH(4)) synthesis. METHODS Primarily cultured human TM cells were exposed to 1, 10, and 100 microgram/ml of insulin and 0, 1, 10, 100 and 1000 nM dexamethasone for 3 days. To evaluate the enzymatic pathway of BH(4)...

all-trans-Retinoic acid (atRA) has important effects on the developing and mature cardiovascular system. Nitric oxide (NO) production has been associated with the atRA-induced differentiation of neuronal cells, and we hypothesized that NO may also mediate certain actions of atRA in the cardiovascular system. We studied the effects of atRA on NO production by endothelial cells and determined whe...

Acute and subacute administration of zinc exert neuroprotective effects in hypoxia-ischemia animal models; yet the effect of chronic administration of zinc still remains unknown. We addressed this issue by injecting zinc at a tolerable dose (0.5 mg/kg weight, i.p.) for 14 days before common carotid artery occlusion (CCAO) in a rat. After CCAO, the level of zinc was measured by atomic absorption...