Limits...
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

Behavioral assessment. In spatial acquisition phase there were no significant differences in block 1 and 2 among the six groups before application of amyloid-β, but Repeated measure test showed a significant reduction in (a) escape latency (P < 0.001), (b) swimming distance (P < 0.001), and (c) swimming speed (P < 0.001) in 2nd block compared with 1st block to locate the platform across blocks of trials
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4544115&req=5

Figure 4: Behavioral assessment. In spatial acquisition phase there were no significant differences in block 1 and 2 among the six groups before application of amyloid-β, but Repeated measure test showed a significant reduction in (a) escape latency (P < 0.001), (b) swimming distance (P < 0.001), and (c) swimming speed (P < 0.001) in 2nd block compared with 1st block to locate the platform across blocks of trials

Mentions: There were no significant differences in the mean time latency (F (5, 54) =0.041, P = 1 >0.05), mean swimming distance (F (5, 54) =0.128, P = 0.9 >0.05), and mean swimming speed (F (5, 54) =0.426, P = 0.8 >0.05) in blocks 1 and 2 of the spatial acquisition among all groups before application of A-β [Figure 4a–c, blocks 1 and 2], but repeated measure test showed a significant difference in escape latency, swimming distance, and swimming speed (F (1, 54) = 74.96, P < 0.001); (F (1, 54) = 397.22, P < 0.001); (F (1, 54) = 20.14, P < 0.001 respectively) between blocks 1 and block 2 were observed [Figure 4a–c, blocks 1 and 2] to locate the platform across blocks of trials, indicating spatial acquisition performance in all groups improved significantly during the training days and were able to learn the task.


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)

Behavioral assessment. In spatial acquisition phase there were no significant differences in block 1 and 2 among the six groups before application of amyloid-β, but Repeated measure test showed a significant reduction in (a) escape latency (P < 0.001), (b) swimming distance (P < 0.001), and (c) swimming speed (P < 0.001) in 2nd block compared with 1st block to locate the platform across blocks of trials
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: Behavioral assessment. In spatial acquisition phase there were no significant differences in block 1 and 2 among the six groups before application of amyloid-β, but Repeated measure test showed a significant reduction in (a) escape latency (P < 0.001), (b) swimming distance (P < 0.001), and (c) swimming speed (P < 0.001) in 2nd block compared with 1st block to locate the platform across blocks of trials
Mentions: There were no significant differences in the mean time latency (F (5, 54) =0.041, P = 1 >0.05), mean swimming distance (F (5, 54) =0.128, P = 0.9 >0.05), and mean swimming speed (F (5, 54) =0.426, P = 0.8 >0.05) in blocks 1 and 2 of the spatial acquisition among all groups before application of A-β [Figure 4a–c, blocks 1 and 2], but repeated measure test showed a significant difference in escape latency, swimming distance, and swimming speed (F (1, 54) = 74.96, P < 0.001); (F (1, 54) = 397.22, P < 0.001); (F (1, 54) = 20.14, P < 0.001 respectively) between blocks 1 and block 2 were observed [Figure 4a–c, blocks 1 and 2] to locate the platform across blocks of trials, indicating spatial acquisition performance in all groups improved significantly during the training days and were able to learn the task.

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