Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice
Previous studies have shown that <i>Dendrobium nobile</i> Lindl. alkaloids (DNLAs) have neuroprotective effects in several Alzheimer’s disease (AD) models. Dendrobine (DDB) is one of the monomer components with the highest content in DNLAs. However, the effects of DDB on cognitive impair...
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MDPI AG
2024-02-01
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| Series: | Brain Sciences |
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| Online Access: | https://www.mdpi.com/2076-3425/14/3/231 |
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| author | Wei Zhang Juan Huang Jingshan Shi |
| author_facet | Wei Zhang Juan Huang Jingshan Shi |
| author_sort | Wei Zhang |
| collection | DOAJ |
| description | Previous studies have shown that <i>Dendrobium nobile</i> Lindl. alkaloids (DNLAs) have neuroprotective effects in several Alzheimer’s disease (AD) models. Dendrobine (DDB) is one of the monomer components with the highest content in DNLAs. However, the effects of DDB on cognitive impairments in AD remain unknown. In this study, we investigated the efficacy of DDB in 3 × Tg-AD mice to determine whether DDB was a key component of the anti-AD effect of DNLAs. Five-month mice were intragastrically administrated with DDB (10 and 20 mg/kg/d) or DNLAs (20 mg/kg/d) for seven consecutive months, and the effects of DDB and DNLAs were evaluated at twelve months. The results revealed that 3 × Tg-AD mice treated with DDB showed enhanced nesting ability. DDB also effectively rescued spatial learning and memory deficits in 3 × Tg-AD mice. Meanwhile, DDB treatment prevented the loss of dendritic spine density, with increased expression levels of synaptophysin, PSD95, and NCAM in the hippocampus. Finally, DDB ameliorated the increase in APP, sAPPβ, CTF-β, and β-amyloid peptides, accompanied by the promotion of GSK phosphorylation at the Ser9 site, thereby reducing hyperphosphorylated tau levels. As the active component of DNLA, DDB can preserve cognitive function, alleviate neuronal and synaptic defects, and improve APP/tau pathology in 3 × Tg-AD mice. |
| first_indexed | 2024-04-24T18:28:44Z |
| format | Article |
| id | doaj.art-19b2f955793d455fa3349f46281c171d |
| institution | Directory Open Access Journal |
| issn | 2076-3425 |
| language | English |
| last_indexed | 2024-04-24T18:28:44Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj.art-19b2f955793d455fa3349f46281c171d2024-03-27T13:28:42ZengMDPI AGBrain Sciences2076-34252024-02-0114323110.3390/brainsci14030231Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD MiceWei Zhang0Juan Huang1Jingshan Shi2Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, ChinaKey Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, ChinaKey Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, ChinaPrevious studies have shown that <i>Dendrobium nobile</i> Lindl. alkaloids (DNLAs) have neuroprotective effects in several Alzheimer’s disease (AD) models. Dendrobine (DDB) is one of the monomer components with the highest content in DNLAs. However, the effects of DDB on cognitive impairments in AD remain unknown. In this study, we investigated the efficacy of DDB in 3 × Tg-AD mice to determine whether DDB was a key component of the anti-AD effect of DNLAs. Five-month mice were intragastrically administrated with DDB (10 and 20 mg/kg/d) or DNLAs (20 mg/kg/d) for seven consecutive months, and the effects of DDB and DNLAs were evaluated at twelve months. The results revealed that 3 × Tg-AD mice treated with DDB showed enhanced nesting ability. DDB also effectively rescued spatial learning and memory deficits in 3 × Tg-AD mice. Meanwhile, DDB treatment prevented the loss of dendritic spine density, with increased expression levels of synaptophysin, PSD95, and NCAM in the hippocampus. Finally, DDB ameliorated the increase in APP, sAPPβ, CTF-β, and β-amyloid peptides, accompanied by the promotion of GSK phosphorylation at the Ser9 site, thereby reducing hyperphosphorylated tau levels. As the active component of DNLA, DDB can preserve cognitive function, alleviate neuronal and synaptic defects, and improve APP/tau pathology in 3 × Tg-AD mice.https://www.mdpi.com/2076-3425/14/3/231Dendrobinespatial memorysynaptic lossβ-amyloidtau |
| spellingShingle | Wei Zhang Juan Huang Jingshan Shi Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice Brain Sciences Dendrobine spatial memory synaptic loss β-amyloid tau |
| title | Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice |
| title_full | Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice |
| title_fullStr | Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice |
| title_full_unstemmed | Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice |
| title_short | Dendrobine Ameliorates Alzheimer’s Disease-like Pathology and Cognitive Decline in 3 × Tg-AD Mice |
| title_sort | dendrobine ameliorates alzheimer s disease like pathology and cognitive decline in 3 tg ad mice |
| topic | Dendrobine spatial memory synaptic loss β-amyloid tau |
| url | https://www.mdpi.com/2076-3425/14/3/231 |
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