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Neuroprotective effects of Rosa damascena extract on learning and memory in a rat model of amyloid-β-induced Alzheimer's disease.

Esfandiary E, Karimipour M, Mardani M, Ghanadian M, Alaei HA, Mohammadnejad D, Esmaeili A - Adv Biomed Res (2015)

Bottom Line: Current medications only slow down the dementia progression and the present treatment one-drug one-target paradigm for anti-AD treatment appears to be clinically unsuccessful.Therefore, alternative therapeutic strategies are urgently needed.According to these results, we concluded that R. damascena can reverse behavioral deficits caused by A-β, and may provide a new potential option for prevention and treatment of the cognitive dysfunction in Alzheimer's disease.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomical Sciences and Molecular Biology, Faculty of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.

ABSTRACT

Background: Alzheimer's disease (AD) is an age-related progressive neurodegenerative disease, which is characterized clinically by serious impairment in memory and cognition. Current medications only slow down the dementia progression and the present treatment one-drug one-target paradigm for anti-AD treatment appears to be clinically unsuccessful. Therefore, alternative therapeutic strategies are urgently needed. With respect to multifunctional and multitargeted characteristics of Rosa damascena via its effective flavonoids, we investigated the effects of R. damascena extract on behavioral functions in a rat model of amyloid-β (A-β)-induced Alzheimer's disease.

Materials and methods: After preparation of the methanolic extract of the R. damascena, HPLC analysis and toxicity studies, median lethal dose (LD50) and dose levels were determined. For evaluation of baseline training behavioral performance, Morris water maze and passive avoidance tests were used. A-β was injected bilaterally into CA1 area of the hippocampus. Twenty-one days after injection of A-β, the first probe trial of the behavioral tests were used to confirm learning and memory impairment. To examine the potential effects of the extract on behavioral tasks, the second probe trials were performed after one month administration of R. damasena extract.

Results: Results showed that the R. damascena extract significantly improved the spatial and long-term memories in the extract- treated groups in a dose-dependent manner, as in the middle and high doses it had significant effect.

Conclusion: According to these results, we concluded that R. damascena can reverse behavioral deficits caused by A-β, and may provide a new potential option for prevention and treatment of the cognitive dysfunction in Alzheimer's disease.

No MeSH data available.


Related in: MedlinePlus

Experimental schedule of the research design during the course of the study
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Figure 1: Experimental schedule of the research design during the course of the study

Mentions: Male Wistar rats (200–250 g) were housed four per cage and maintained on a 12 h light–dark cycle in an air-conditioned constant temperature (23 ± 1°C) room, with food and water made available ad libitum. The Ethics Committee for Animal Experiments at Isfahan University of Medical Sciences approved the study, and all experiments were conducted in accordance with the international guiding principles for biomedical research involving animals, revised in 1985. Initially, all animals were randomly divided into 6 groups (n = 10) for evaluation of baseline training performance in Morris water maze and passive avoidance tests. After spatial acquisition phase of Morris water maze and training (learning) phase of the passive avoidance test, animals were grouped as following: First group = control, Second group = sham, Third group = Alzheimer's disease + Normal saline, Fourth group = Alzheimer's disease + 300 mg of R. damascena extract, Fifth group = Alzheimer's disease + 600 mg of R. damascena extract and sixth group = Alzheimer's disease + 1200 mg of R. damascena extract. The protocol of experimental design is summarized in Figure 1.


Neuroprotective effects of Rosa damascena extract on learning and memory in a rat model of amyloid-β-induced Alzheimer's disease.

Esfandiary E, Karimipour M, Mardani M, Ghanadian M, Alaei HA, Mohammadnejad D, Esmaeili A - Adv Biomed Res (2015)

Experimental schedule of the research design during the course of the study
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4544115&req=5

Figure 1: Experimental schedule of the research design during the course of the study
Mentions: Male Wistar rats (200–250 g) were housed four per cage and maintained on a 12 h light–dark cycle in an air-conditioned constant temperature (23 ± 1°C) room, with food and water made available ad libitum. The Ethics Committee for Animal Experiments at Isfahan University of Medical Sciences approved the study, and all experiments were conducted in accordance with the international guiding principles for biomedical research involving animals, revised in 1985. Initially, all animals were randomly divided into 6 groups (n = 10) for evaluation of baseline training performance in Morris water maze and passive avoidance tests. After spatial acquisition phase of Morris water maze and training (learning) phase of the passive avoidance test, animals were grouped as following: First group = control, Second group = sham, Third group = Alzheimer's disease + Normal saline, Fourth group = Alzheimer's disease + 300 mg of R. damascena extract, Fifth group = Alzheimer's disease + 600 mg of R. damascena extract and sixth group = Alzheimer's disease + 1200 mg of R. damascena extract. The protocol of experimental design is summarized in Figure 1.

Bottom Line: Current medications only slow down the dementia progression and the present treatment one-drug one-target paradigm for anti-AD treatment appears to be clinically unsuccessful.Therefore, alternative therapeutic strategies are urgently needed.According to these results, we concluded that R. damascena can reverse behavioral deficits caused by A-β, and may provide a new potential option for prevention and treatment of the cognitive dysfunction in Alzheimer's disease.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomical Sciences and Molecular Biology, Faculty of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.

ABSTRACT

Background: Alzheimer's disease (AD) is an age-related progressive neurodegenerative disease, which is characterized clinically by serious impairment in memory and cognition. Current medications only slow down the dementia progression and the present treatment one-drug one-target paradigm for anti-AD treatment appears to be clinically unsuccessful. Therefore, alternative therapeutic strategies are urgently needed. With respect to multifunctional and multitargeted characteristics of Rosa damascena via its effective flavonoids, we investigated the effects of R. damascena extract on behavioral functions in a rat model of amyloid-β (A-β)-induced Alzheimer's disease.

Materials and methods: After preparation of the methanolic extract of the R. damascena, HPLC analysis and toxicity studies, median lethal dose (LD50) and dose levels were determined. For evaluation of baseline training behavioral performance, Morris water maze and passive avoidance tests were used. A-β was injected bilaterally into CA1 area of the hippocampus. Twenty-one days after injection of A-β, the first probe trial of the behavioral tests were used to confirm learning and memory impairment. To examine the potential effects of the extract on behavioral tasks, the second probe trials were performed after one month administration of R. damasena extract.

Results: Results showed that the R. damascena extract significantly improved the spatial and long-term memories in the extract- treated groups in a dose-dependent manner, as in the middle and high doses it had significant effect.

Conclusion: According to these results, we concluded that R. damascena can reverse behavioral deficits caused by A-β, and may provide a new potential option for prevention and treatment of the cognitive dysfunction in Alzheimer's disease.

No MeSH data available.


Related in: MedlinePlus