M.M. Attarpour Yazdi; M. Kamalinejad; N.S. Falvaei Koochak; S. Mansouri
Abstract
Burn wound is suitable site for incidence of resistant infections. Thus, the research for finding effective drugs against this problem is necessary. Medicinal herbs with antimicrobial activity have important role in traditional medicine. The purpose of this study was to determine antibacterial activity ...
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Burn wound is suitable site for incidence of resistant infections. Thus, the research for finding effective drugs against this problem is necessary. Medicinal herbs with antimicrobial activity have important role in traditional medicine. The purpose of this study was to determine antibacterial activity of methanolic extract of Terminalia catappa L. fruitagainst bacteria isolated from burn wound infections and to compare with effects of some selected antibiotics. First, a sample of methanolic extract of the Terminalia catappa fruit was prepared and then its antibacterial activity against 8 bacteria from 100 samples of burn wound infection were evaluated by well diffusion method at concentration of 40 mg/ml and then Agar Serial Dilution method in the range of 0.039-20mg/ml. Also, the MIC (Minimal Inhibitory Concentration) of extract was determined. The antibacterial activity of selective antibiotics was tested by disk diffusion method. The onava test was used to compare the results. The results from the antibacterial tests demonstrated that the Terminalia catappa methanolic extract had been effected against all of Pseudomonas aeruginosa, Acinetobacter spp. and more than 80% of Staphylococcus aureus/epidermidis/saprophyticus, and against 50% of Escherichia coli. The MIC of the extract against all the sensitive cases was 20 mg/ml. The bacteria were often resistant to selective drugs .There was significant difference between the effects of plant and antibiotics on Pseudomonas aeruginosa (P<0/001), Acinetobacter spp. (P<0/05) and Staphylococcus cases (P<0/05). This study demonstrated that methanolic extract of Terminalia catappa have excellent antibacterial activity against most of bacteria isolated from burn wound infections and its effect is better than selective antibiotics. However, we need more in vitro and in vivo investigation.
S. Farjnia; M. Janahmadi; H. Abbasipour; J. Vatanparast; M. Kamalinejad
Volume 24, Issue 2 , August 2008, , Pages 225-236
Abstract
Tarragon)Artemisia dracunculus L.) is a perennial herb in the Asteraceae family used for its aromatic leaves in seasoning. In Iranian ancient medicine, the dried aerial parts of this plant were orally used to treat epilepsy. Epilepsy is one of the most common neurological disorders. In the present study, ...
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Tarragon)Artemisia dracunculus L.) is a perennial herb in the Asteraceae family used for its aromatic leaves in seasoning. In Iranian ancient medicine, the dried aerial parts of this plant were orally used to treat epilepsy. Epilepsy is one of the most common neurological disorders. In the present study, using intracellular recording the anti-epileptiform potential of the ethanolic extract of tarragon and its possible cellular mechanism was assessed against pentylenetetrazole (PTZ) epileptogenesis. In the presence of tarragon extract (0.1%), the PTZ-induced burst activity disappeared. The cell membrane potential became 67.8% more depolarized than the control value. The firing frequency also decreased 62.5% and 83.8% compared to control and in the presence of PTZ, respectively. Exposure to extract, furthermore, caused 36% reduction in the amplitude of after hyper polarization (AHP) compared to control, but not to PTZ, condition. On the other hand, extra cellular application of extract alone led to a membrane depolarization by about 16.69%. While, the firing frequency reduced to 77.3% of control and the amplitude of both action potential and AHP remained almost unchanged. These changes were associated with a shift in the neuronal firing pattern from regular tonic to an irregular mode. Pretreatment with tarragon extract did not completely prevent the epileptogenesis induced by PTZ. Consequently, these results suggest that tarragon extract reduces the neuronal excitability possibly through the membrane depolarization.
