Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease
We aimed to investigate the potential therapeutic effects of the active substance of green tea, epigallocatechin-3-gallate (EGCG), on behavioral phenotypes and markers of neurogenesis in an Alzheimer disease (AD) rat model. The groups included sham, AD, and three AD groups receiving orally EGCG with...
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| Format: | Article |
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Elsevier
2025-03-01
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| Series: | Biochemistry and Biophysics Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405580825000172 |
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| author | Farnaz Ghayour Babaei Ehsan Saburi Fatemeh Forouzanfar Mohadese Asgari Zakieh Keshavarzi Vahid Hajali |
| author_facet | Farnaz Ghayour Babaei Ehsan Saburi Fatemeh Forouzanfar Mohadese Asgari Zakieh Keshavarzi Vahid Hajali |
| author_sort | Farnaz Ghayour Babaei |
| collection | DOAJ |
| description | We aimed to investigate the potential therapeutic effects of the active substance of green tea, epigallocatechin-3-gallate (EGCG), on behavioral phenotypes and markers of neurogenesis in an Alzheimer disease (AD) rat model. The groups included sham, AD, and three AD groups receiving orally EGCG with different doses of 25, 50, and 100 mg/kg. The AD model was induced by intracerebroventricular (icv) injection of streptozocin (STZ) at a dose of 3 mg/kg. Spatial learning and memory were evaluated in the Morris water maze (MWM) test. Real-time PCR assay was used for evaluating the expression of beta-amyloid precursor protein (APP) and brain-derived neurotrophic factor (BDNF) in the hippocampus of animals. STZ disrupted the function of animals in MWM acquisition phase by almost 65 % and all doses of EGCG could return the learning parameters to those of control animals. STZ also impaired the memory function (P < 0.05) and a dose of 25 mg/kg EGCG could significantly return it to the control level (29 % vs 53 %, P < 0.01). Hippocampal APP gene expression was increased in the AD group and EGCG with dose 25 mg/kg decreased it significantly (P < 0.05). AD animals had decreased levels of hippocampal BDNF and treating with dose 25 mg/kg of EGCG could significantly increase it (P < 0.05). EGCG with dose 25 mg/kg can improve spatial memory deficits in AD model rats. It may be due to the impact on the expression of hippocampal factors involved in AD pathology. These findings could provide a beneficial insight for developing novel, safe, and efficient natural compounds for preventing or alleviation AD symptoms in humans. |
| format | Article |
| id | doaj-art-6c11187782954cd49bc4eeeb4f4d8607 |
| institution | Kabale University |
| issn | 2405-5808 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Biochemistry and Biophysics Reports |
| spelling | doaj-art-6c11187782954cd49bc4eeeb4f4d86072025-02-02T05:27:44ZengElsevierBiochemistry and Biophysics Reports2405-58082025-03-0141101930Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like diseaseFarnaz Ghayour Babaei0Ehsan Saburi1Fatemeh Forouzanfar2Mohadese Asgari3Zakieh Keshavarzi4Vahid Hajali5Department of Biology, Ferdowsi University of Mashhad, Mashhad, IranMedical Genetics and Molecular Medicine Department, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, IranDepartment of Neurosciences, Mashhad University of Medical Sciences, Mashhad, IranStudent Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, IranNatural Product and Medicinal Plants Research Center, North Khorasan University of Medical Sciences, Bojnurd, IranDepartment of Neurosciences, Mashhad University of Medical Sciences, Mashhad, Iran; Corresponding author.We aimed to investigate the potential therapeutic effects of the active substance of green tea, epigallocatechin-3-gallate (EGCG), on behavioral phenotypes and markers of neurogenesis in an Alzheimer disease (AD) rat model. The groups included sham, AD, and three AD groups receiving orally EGCG with different doses of 25, 50, and 100 mg/kg. The AD model was induced by intracerebroventricular (icv) injection of streptozocin (STZ) at a dose of 3 mg/kg. Spatial learning and memory were evaluated in the Morris water maze (MWM) test. Real-time PCR assay was used for evaluating the expression of beta-amyloid precursor protein (APP) and brain-derived neurotrophic factor (BDNF) in the hippocampus of animals. STZ disrupted the function of animals in MWM acquisition phase by almost 65 % and all doses of EGCG could return the learning parameters to those of control animals. STZ also impaired the memory function (P < 0.05) and a dose of 25 mg/kg EGCG could significantly return it to the control level (29 % vs 53 %, P < 0.01). Hippocampal APP gene expression was increased in the AD group and EGCG with dose 25 mg/kg decreased it significantly (P < 0.05). AD animals had decreased levels of hippocampal BDNF and treating with dose 25 mg/kg of EGCG could significantly increase it (P < 0.05). EGCG with dose 25 mg/kg can improve spatial memory deficits in AD model rats. It may be due to the impact on the expression of hippocampal factors involved in AD pathology. These findings could provide a beneficial insight for developing novel, safe, and efficient natural compounds for preventing or alleviation AD symptoms in humans.http://www.sciencedirect.com/science/article/pii/S2405580825000172Alzheimer's diseaseEGCGGreen teaSpatial memoryNeurogenesisBDNF |
| spellingShingle | Farnaz Ghayour Babaei Ehsan Saburi Fatemeh Forouzanfar Mohadese Asgari Zakieh Keshavarzi Vahid Hajali Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease Biochemistry and Biophysics Reports Alzheimer's disease EGCG Green tea Spatial memory Neurogenesis BDNF |
| title | Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease |
| title_full | Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease |
| title_fullStr | Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease |
| title_full_unstemmed | Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease |
| title_short | Effect of epigallocatechin-3-gallate (EGCG) on cognitive functioning and the expression of APP and BDNF in the hippocampus of rats with streptozotocin -induced Alzheimer-like disease |
| title_sort | effect of epigallocatechin 3 gallate egcg on cognitive functioning and the expression of app and bdnf in the hippocampus of rats with streptozotocin induced alzheimer like disease |
| topic | Alzheimer's disease EGCG Green tea Spatial memory Neurogenesis BDNF |
| url | http://www.sciencedirect.com/science/article/pii/S2405580825000172 |
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