The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats
Background: Regarding the modulatory effects of tamoxifen (TAM) on the actions of estrogen in the present study, the effects of TAM on learning, memory and brain tissues oxidative damage in ovariectomized (OVX) and naοve female rats was investigated. Materials and Methods: The animals were divided...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2014-01-01
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| Series: | Advanced Biomedical Research |
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| Online Access: | http://www.advbiores.net/article.asp?issn=2277-9175;year=2014;volume=3;issue=1;spage=219;epage=219;aulast=Zabihi |
| _version_ | 1818261021233512448 |
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| author | Hoda Zabihi Mahmoud Hosseini Masoume Pourganji Shahrbanoo Oryan Mohammad Soukhtanloo Saeed Niazmand |
| author_facet | Hoda Zabihi Mahmoud Hosseini Masoume Pourganji Shahrbanoo Oryan Mohammad Soukhtanloo Saeed Niazmand |
| author_sort | Hoda Zabihi |
| collection | DOAJ |
| description | Background: Regarding the modulatory effects of tamoxifen (TAM) on the actions of estrogen in the present study, the effects of TAM on learning, memory and brain tissues oxidative damage in ovariectomized (OVX) and naοve female rats was investigated.
Materials and Methods: The animals were divided into: (1) Sham, (2) OVX, (3) Sham-tamoxifen (Sham-TAM) and (4) ovariectomized-tamoxifen (OVX-TAM). The animals of the Sham-TAM and OVX-TAM groups were treated by TAM (1 mg/kg; 4 weeks).
Results : In Morris water maze, the escape latency in the OVX group was higher than in the Sham group (P < 0.01). The time latency in the animals of OVX-TAM group was lower than that of OVX group (P < 0.01); however, there were no significant differences between the Sham-TAM and Sham groups. In the probe trial, the time spent in target quadrant (Q 1 ) by the animals of OVX group was lower than that of Sham group (P < 0.01). Interestingly, the animals of OVX-TAM group spent more times in target quadrant (Q 1 ) compared with OVX group (P < 0.01). In passive avoidance test, the animals of OVX group had lower latencies to enter the dark compartment compared with the Sham group (P < 0.05). The time latency to enter the dark compartment by animals of OVX-TAM group was higher than in OVX group (P < 0.01). In OVX-TAM group, the total thiol concentration was significantly higher (P < 0.05) and malondialdehyde concentration was lower (P < 0.01) than OVX group.
Conclusions: These results allow us to propose that TAM enhances learning and memory of OVX rats. The possible mechanism may be due to the protective effects against brain tissues oxidative damage. |
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| institution | Directory Open Access Journal |
| issn | 2277-9175 2277-9175 |
| language | English |
| last_indexed | 2024-12-12T18:40:36Z |
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| publisher | Wolters Kluwer Medknow Publications |
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| series | Advanced Biomedical Research |
| spelling | doaj.art-bd9c8741c5ff4e9695b708de01f2bcb52022-12-22T00:15:38ZengWolters Kluwer Medknow PublicationsAdvanced Biomedical Research2277-91752277-91752014-01-013121921910.4103/2277-9175.143297The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female ratsHoda ZabihiMahmoud HosseiniMasoume PourganjiShahrbanoo OryanMohammad SoukhtanlooSaeed NiazmandBackground: Regarding the modulatory effects of tamoxifen (TAM) on the actions of estrogen in the present study, the effects of TAM on learning, memory and brain tissues oxidative damage in ovariectomized (OVX) and naοve female rats was investigated. Materials and Methods: The animals were divided into: (1) Sham, (2) OVX, (3) Sham-tamoxifen (Sham-TAM) and (4) ovariectomized-tamoxifen (OVX-TAM). The animals of the Sham-TAM and OVX-TAM groups were treated by TAM (1 mg/kg; 4 weeks). Results : In Morris water maze, the escape latency in the OVX group was higher than in the Sham group (P < 0.01). The time latency in the animals of OVX-TAM group was lower than that of OVX group (P < 0.01); however, there were no significant differences between the Sham-TAM and Sham groups. In the probe trial, the time spent in target quadrant (Q 1 ) by the animals of OVX group was lower than that of Sham group (P < 0.01). Interestingly, the animals of OVX-TAM group spent more times in target quadrant (Q 1 ) compared with OVX group (P < 0.01). In passive avoidance test, the animals of OVX group had lower latencies to enter the dark compartment compared with the Sham group (P < 0.05). The time latency to enter the dark compartment by animals of OVX-TAM group was higher than in OVX group (P < 0.01). In OVX-TAM group, the total thiol concentration was significantly higher (P < 0.05) and malondialdehyde concentration was lower (P < 0.01) than OVX group. Conclusions: These results allow us to propose that TAM enhances learning and memory of OVX rats. The possible mechanism may be due to the protective effects against brain tissues oxidative damage.http://www.advbiores.net/article.asp?issn=2277-9175;year=2014;volume=3;issue=1;spage=219;epage=219;aulast=ZabihiLearningmemorymorris water mazeovariectomyoxidative damagepassive avoidancetamoxifen |
| spellingShingle | Hoda Zabihi Mahmoud Hosseini Masoume Pourganji Shahrbanoo Oryan Mohammad Soukhtanloo Saeed Niazmand The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats Advanced Biomedical Research Learning memory morris water maze ovariectomy oxidative damage passive avoidance tamoxifen |
| title | The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats |
| title_full | The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats |
| title_fullStr | The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats |
| title_full_unstemmed | The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats |
| title_short | The effects of tamoxifen on learning, memory and brain tissues oxidative damage in ovariectomized and naïve female rats |
| title_sort | effects of tamoxifen on learning memory and brain tissues oxidative damage in ovariectomized and naive female rats |
| topic | Learning memory morris water maze ovariectomy oxidative damage passive avoidance tamoxifen |
| url | http://www.advbiores.net/article.asp?issn=2277-9175;year=2014;volume=3;issue=1;spage=219;epage=219;aulast=Zabihi |
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