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Showing 3 results for esmaeilpour

Khadije esmaeilpour, Mehdi Abbasnejad, Saeed Esmaeili Mahani, Yaser Masomi Ardakani,
Volume 13, Issue 4 (Winter 2010)
Abstract

Introduction: Ascorbic acid (AA) is present in high concentrations with heterogeneous distribution in the mammalian brain. Previous studies have shown that release of various neurotransmitters such as glutamate, acetylcholine and dopamine might be involved in the central AA release. On the other hand all of these neurotransmitters and the region CA1 of the hippocampus are involved in learning and memory. The aim of the present study was to evaluate the effects of ascorbic acid injection in the CA1 region on spatial learning and memory in adult male rats. Methods: 42 adult male NMRI rats (250-300 g) divided into 6 groups were used in this study. They included control group that received no injection, sham-operated group that received normal saline injection as vehicle and four groups that received different doses of ascorbic acid (6, 12, 24 and 48 μg/rat). All injections were given in 5 consecutive days and 30 min after each injection, the rats were tested in the Morris Water Maze test to measure learning and memory task. Spatial learning and memory parameters were subjected to analysis of variance (ANOVA). Results: The results indicated that intrahippocampal microinjection of AA (12 and 24 μg/rat) significantly increased some spatial learning and memory parameters such as escape latency and path length to reach the hidden platform. Conclusion: Our findings show that AA injection into the CA1 region has a negative effect on spatial learning and memory.
Yaser Masoumi-Ardakani, Mehdi Abbasnejad, Amin Derakhshanfar, Khadije esmaeilpour Bezenjani, Ali Mostafavi,
Volume 14, Issue 3 (Fall 2010)
Abstract

Introduction: Ulcerative colitis is a chronic inflammation of the large intestine (colon). In patients with ulcerative colitis, ulcers and inflammation of the inner lining of the colon lead to symptoms such as abdominal pain, diarrhea, and rectal bleeding. Previous studies have shown that Matricaria recutita L. have a series of physiological effects for example spasmolytic, carminative, antioxidant and anti-inflammatory. In the present study, the effect of this herbal aqueous extract on a model of acute experimental colitis was evaluated. Methods: Experiments were performed on 5 groups (N=7) of male NMRI rats (230-280g). Three groups were administered orally different doses of extract (10, 20 and 30 mg/kg), fourth group received vehicle and the last considered as control group. For induction of colitis the rats were fasted for 36 hours and then anaesthetized with ether, at the last stage 2 ml of acetic acid 4% was instilled via the anus. After 24 hours the macroscopic study showed the colitis indices. Results: The aqueous extract of M. recutita with doses of (20 and 30 mg/kg) significantly reduced colon weight/length ratio. Extract with the highest dose (30 mg/kg) was effective to decrease as well as inflammation severity and extent. The histopathological studies of colon section showed that, curing or treating effects of extract 10, 20, and 30 mg/kg is mild, moderate and completely, respectively. Conclusion: It is concluded that Matricaria recutita L. aqueous extract was effective in treatment against experimental acute colitis. It can decrease inflammatory indices of ulcerative colitis.
Khadijeh esmaeilpour, Vahid Sheibani, Hakimeh Saadati,
Volume 19, Issue 2 (June 2015 2015)
Abstract

Previous studies have shown that caffeine has beneficial effects on cognitive impairment in sleep deprived male rats. Therefore in the present study, we examined the effects of chronic caffeine administration on learning and memory impairments induced by sleep deprivation (SD) in the intact and ovarectomized (OVX) female rats. Two sets of animals including intact and OVX were randomly recruited into the following subgroups: control, SD, wide platform (Sham platform), caffeine, and caffeine plus SD. Multiple platform method was used for SD induction. Spatial learning and memory were determined using Morris water maze (MWM) task. Throughout behavioral investigation, significant learning impairment was observed in sleep-deprived OVX rats compared to the intact and the other OVX groups (P<0.05). Short term memory impairment was observed in both sleep-deprived OVX and intact groups (P<0.05). 4weeks caffeine administration improved these impairments. Based on these findings we propose that sleep deprivation impaired cognitive function whereas caffeine treatment reversed these impairments.



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