Physical Education
Mehdi Zarei; Rahim Golmohammadi; Elham Iziy; Seyed Mehdi Beheshti Nasr
Volume 28, Issue 2 , May and June 2021, , Pages 165-172
Abstract
Introduction: There has been no report on the effect of epilepsy on liver enzymes and lipoproteins and its changes following exercisetraining in epileptic rats with Pentylenetetrazole. Materials and Methods: In this experimental study, 70 male rats were placed in 7 groups. An intact group, three groups ...
Read More
Introduction: There has been no report on the effect of epilepsy on liver enzymes and lipoproteins and its changes following exercisetraining in epileptic rats with Pentylenetetrazole. Materials and Methods: In this experimental study, 70 male rats were placed in 7 groups. An intact group, three groups of Kindle and three groups of non-Kindle who received PTZ or normal saline injections every 48 hours until the animals were kindled. 24 hours after Kindling, blood samples were collected in intact group and two groups of Kindle and non-Kindle. One Kindle group and one non-Kindle group from the remaining four groups performed aerobic exercise for six weeks, and the other two groups were inactive for six weeks. Blood were collected 24 hours after the 6-week period, and were compared with control groups. Results: After 4 weeks of Kindling period, total cholesterol, triglycerides, low-density lipoprotein, liver enzymes (P <0.001) and antigenic coefficient (P <0.01) increased significantly in the epileptic group. After six weeks of aerobic exercise in Kindle animals; Triglycerides (P <0.001), liver enzymes (P <0.01) and antigenic coefficients significantly reduced, and high-density lipoprotein significantly increased (P <0.01). Conclusion: The results showed that aerobic exercise in epileptic rats with Pentylenetetrazole improved lipid profile impairement and increased liver enzymes caused by epilepsy.
Physiology & Pharmacology
Zohreh Tavasoli; Narges Hosseinmardi; Mahyar Janahmadi; Mehdi Golpayegani; Farhad Salari; Delaram Jafarzadeh
Volume 24, Issue 1 , March and April 2017, , Pages 71-77
Abstract
Background & Objectives: Considering the role of glial cells in synaptic transmission, regulation of neurotransmitter concentration in synaptic cleft, K+ buffering, and releasing the gliotransmitters, the purpose of this study is to investigate the effect of glial cells inhibition on the progression ...
Read More
Background & Objectives: Considering the role of glial cells in synaptic transmission, regulation of neurotransmitter concentration in synaptic cleft, K+ buffering, and releasing the gliotransmitters, the purpose of this study is to investigate the effect of glial cells inhibition on the progression of seizures induced by chemical kindling in rats. Materials & Methods: In chemical kindling, animals received Pentylenetetrazol, 35 mg/kg each 48 hours, intraperitoneally and five different stages of seizure were appeared gradually and seizure parameters including maximum seizure stage (SS), stage 4 latency (S4L), stage 4&5 duration (S5D), and seizure duration (SD) were measured during 20 min after PTZ injection. Then seizure parameters were evaluated in animals treated with intracerebroventricular (icv) administration of Fluorocitrate (as a glial cells inhibitor), injected 30 min before PTZ, and compared with PTZ treated animals. Results: Results showed that glial cells inhibition with ICV injection of Fluorocitrate decreased SS, S5D, and SD and increased S4L significantly (P<0.05, P<0.01, P<0.001). Conclusion: On the basis of obtained results, it may be concluded that glial cells inhibition reduces spreading rate of epileptiform activity in the nervous system, and the duration of neuronal hyperexcitability and, also, prevents the progression of seizure to final stages.
Nasibeh Akbari; Mahmoud Allahdadi Dalmani; Taghi Lashkar Blouki; Mehdi Godarzvand
Volume 23, Issue 1 , May and June 2016, , Pages 66-74
Abstract
Purpose: Epilepsy, as a plastic change lead to hyperexcitability and structural change. Kindling is the process of repetitive subconvulsive electrical or chemical stimulation induced synaptic and circuit alterations. Lateral hypothalamus (LH) contains the main constellation of orexinergic neurons involved ...
Read More
Purpose: Epilepsy, as a plastic change lead to hyperexcitability and structural change. Kindling is the process of repetitive subconvulsive electrical or chemical stimulation induced synaptic and circuit alterations. Lateral hypothalamus (LH) contains the main constellation of orexinergic neurons involved in sleep and waking and even excitability with high numbers of receptors in hippocampus. Thus, we investigate the effect of LH inactivation on kindling development and kindling induced hippocampal neuronal population. Method: Pentylenetetrazol (PTZ; 45 mg/kg) was used to induce chemical kindling every 48 h up to 13 injections, intraperitoneally. Three consecutive 4 or 5 seizure stages were criteria for kindling. Lidocaine (2%) was injected stereotaxically into right LH, 0.5 h prior to PTZ administration. Nissl staining was used to demonstrate neuronal population survival in CA3 and hilar regions of hippocampus. Results: LH inactivation prevented PTZ kindling development. Although kindling increased neuronal dispersion in CA3 and hilar regions, LH inactivation was unable to reduce the dispersion. Moreover, kindling did not affect neuronal survival in CA3 and hilus, qualitatively. Conclusion: It is concluded that kindling induced structural changes is to some extent independent of kindling development and it is not prevented by kindling inhibition through LH inactivation.
Azam Asgari; Saeed Semnanian; Nafiseh Atapour; Amir Shojaee; Vahid Sheybani; Seyyed Javad Mirnajafi Zadeh
Volume 23, Issue 2 , March and April 2016, , Pages 290-303
Abstract
Background and purpose: Low frequency stimulation (LFS) has anticonvulsant effect. However, its mechanism of action has not been completely determined. In the present study the effect of LFS on evoked inhibitory post synaptic GABAergic currents (eIPSC) is investigated in CA1 pyramidal neurons of the ...
Read More
Background and purpose: Low frequency stimulation (LFS) has anticonvulsant effect. However, its mechanism of action has not been completely determined. In the present study the effect of LFS on evoked inhibitory post synaptic GABAergic currents (eIPSC) is investigated in CA1 pyramidal neurons of the hippocampus in kindled rats. Materials and Methods: In this experimental study animals were kindled through electrical stimulation of amygdala. 24 hours following fully kindling achievement in 20 Wistar rats, the effect of LFS on eIPSCs was assessed in hippocampal slices. Results: Obtained results showed that application of LFS at 200 pulses and at the intensity of 1.5 threshold, increased the amplitude and decay time constant of eIPSCs in both control and kindled rats. When 200 pulses of LFS were administered with an intensity equal to threshold, only eIPSC amplitude was increased in both control and kindled groups significantly (P<0.001). Comparing the effectiveness of LFS on control and kindled groups showed that 200 pulses of LFS at the intensity of 1.5 threshold had higher effect in control than kindled group (P<0.001). Conclusion: Results of the present study showed that LFS application increased eIPSCs parameters in a pulse number and intensity dependent manner. This increment can be considered as a possible anticonvulsant mechanism of LFS.
Simin Namvar Aghdash; Roya Mirzaee
Volume 22, Issue 5 , November and December 2015, , Pages 902-908
Abstract
Background & Objectives: Epilepsy is one of the most common neurological disorders in the world. It affects, at least, on 0.5–2% of people worldwide. It causes serious physical, psychological, social, and economic consequences. Despite a variety of current procedures for treatment of epilepsy, ...
Read More
Background & Objectives: Epilepsy is one of the most common neurological disorders in the world. It affects, at least, on 0.5–2% of people worldwide. It causes serious physical, psychological, social, and economic consequences. Despite a variety of current procedures for treatment of epilepsy, research for discovering new drugs has been continued. Although medicinal plants have been used in traditional medicine for treatment of epilepsy, only a few of the medicinal plants have been examined scientifically. The aim of this study was to study the effect of Thymus vulgaris extract in the treatment of seizure.
Materials & Methods: In this study, 48 mice have been chosen randomly and divided into 6 groups, including control group, sham group that received distilled water, and 4 experimental groups that received aqueous extract of Thymus vulgaris in doses of 100, 200, 400 and 800 mg/kg for 4 weeks. 30 minutes after gavage with different doses of the extract or distilled water, pentylenetetrazol was injected to experimental and sham groups. Animals immediately transferred to a special cage and the seizure behaviors and parameters were recorded by a camera. Then the different phases of seizure were evaluated.
Results: Data analysis indicated that the aqueous extract of Thymus vulgaris had a significant effect on PTZ-induced seizure. The results showed that therapy by this extract increases latency time for onset of seizure and prevents progress of seizure phases.
Conclusion: The attained results showed that Thymus vulgaris extract has anticonvulsant effect on PTZ-induced seizure. Thus, it may be used in seizure treatment.
Seyed Mehdi Beheshti Nasr; Mohammad Mohammadzadeh; Hasan Ramshini
Volume 21, Issue 2 , May and June 2014, , Pages 352-361
Abstract
Introduction: Minocycline has anticonvulsant effects. Since some antiepileptic drugs increase the neurotransmitter GABA in the brain, the aim of this study is the effect of minocycline on gene expression of GABAA receptor in hippocampus and piriform brain areas on amygdale kindling acquisition in rat.
Methods: ...
Read More
Introduction: Minocycline has anticonvulsant effects. Since some antiepileptic drugs increase the neurotransmitter GABA in the brain, the aim of this study is the effect of minocycline on gene expression of GABAA receptor in hippocampus and piriform brain areas on amygdale kindling acquisition in rat.
Methods: In this experimental study, three group (24 Wistar rats), after stereotaxic surgery and 1 week recovery period, received kindling stimulations(twice daily at 6 hours interval). Group 1(n=8) did not receive daily kindling stimulations. Group 2 (n=8) received intraperitoneal saline (1ml/kg) and Group 3 (n=8) received intraperitoeneal minocycline (25 mg/kg) 60 min before kindling stimulation and respectively. Two hours after the last stimulation, animals’ brains were removed and the changes of gene expression by γ2 subunit of GABAAreceptor in the hippocampus and piriform cortex were measured and compared with the control group. Data was analyzed using one-way ANOVA and Tukey post hoc tests (P
Mehdi Zarei; Mohammad Mohammad-Zadeh; Seyyed Mehdi Beheshti Nasr
Volume 19, Issue 3 , September and October 2012, , Pages 217-227
Abstract
Background: Low-frequency stimulation (LFS) (
Read More
Background: Low-frequency stimulation (LFS) (