information about the health risks that might be associated with lipstick consumption effects is scarce in the literature. the present work investigated the bioaccumulation of lead (pb) in brain of rats originated from lipstick sample. first, lead contents were determined in 12 different brands of lipsticks. lead was detected in all the studied samples. the average lead content in 14 lipsticks ...

introduction: development of brain edema following focal cerebral ischemia exacerbates primary ischemic injury. blood brain barrier (bbb) opening is an important part of edema named as vasogenic brain edema. in this study, quantitative alterations of bbb permeability is experimentally evaluated using transient focal cerebral ischemia in the rat. methods: two groups of male rats (ischemic and sh...

results in all groups ischemic changes were apparently observed in hippocampus ca1 neurons. in two-vessel occlusion model, after 3 and 24 hours of reperfusions, ischemic cells accounted for 14.9% and 23.2%, respectively. in four-vessel occlusion model, after 3 and 24 hours of reperfusions, ischemic cells accounted for 7.6% and 44.9% (p < 0.0001), respectively. background an appropriate animal m...

introduction: in iran, thousands of young individuals become victims of head injury annually. head injury can damage neuronal cells which may in turn complicate the recovery of the patients. also, the increase of iron in cerebrospinal fluid (csf) following head injury may contribute to the hypoxic-ischemia brain damage by catalyzing the formation of free radicals (harber-weiss rection). the obj...

objective(s) the mechanism(s) by which antidepressants regulate the hypothalamic-pituitary-adrenal (hpa) axis remain elusive. the endocannabinoid system (ecbs) which exhibits antidepressant potential, appears to regulate the hpa axis activity. therefore, we aimed to investigate the role of the ecbs in the action of doxepin including its effect on the hpa axis. materials and methods male wistar ...

acetylcholinesterase (ache) is a large glycoprotein that, aside from its known cholinolytic activity, co-exists with other transmitter systems and possesses other functions. in the present study, the effects of short-term rapid-eye-movement sleep deprivation (rem-sd) on ache activity in the anterior hypothalamic area have been investigated. using the flower-pot method, adult male albino rats we...

background: the induction of brain-derived neurotrophic factor (bdnf) expression in the hippocampus has shown to play a role in the beneficial effects of resveratrol (rsv) on the learning and memory. the bdnf gene has a complicated structure with eight 5’ noncoding exons (i-ixa), each of which can splice to a common coding exon (ix) to form a functional transcript. estrogens increase levels of ...

objective(s): brain edema is one of the most serious causes of death within the first few days after trauma brain injury (tbi). in this study we have investigated the role of shilajit on brain edema, blood-brain barrier (bbb) permeability, intracranial pressure (icp) and neurologic outcomes following brain trauma.   materials and methods: diffuse traumatic brain trauma was induced in rats by dr...

results the i/r group showed a significant increase in pycnotic (dying) neurons and pretreatment with wc at doses of 500 mg/kg and 1000 mg/kg significantly reduced pycnotic and tunel positive neurons, in a dose dependent manner in ischemic brain cortex. conclusions our findings indicated that wc has neuroprotective effects and is able to reduce histopathological alterations and apoptosis in bra...

objective(s): targeting the neuropeptide systems has been shown to be useful for the development of more effective antipsychotic drugs. neurotensin, an endogenous neuropeptide, appears to be involved in the mechanism of action of antipsychotics. however, the available data provide conflicting results and the mechanism(s) by which antipsychotics affect brain neurotensin neurotransmission have no...