Cited by 30Flavonoids in Medical ResearchMedicinal Plants and NeuroprotectionCholinesterase and Neurodegenerative Diseases

Baicalein 5,6-Dimethyl Ether Prevents Memory Deficits in the Scopolamine Zebrafish Model by Regulating Cholinergic and Antioxidant Systems

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Brinza, Ion, Ayoub, Iriny M., Eldahshan, Omayma A., Hritcu, Lucian·2021·Plants

Abstract

Baicalein 5,6-dimethyl ether, a bioactive flavonoid isolated for the first time from Alnus rugosa, was explored for its capability to relieve memory deficits and decrease oxidative stress. We examined the neuropharmacological effects of baicalein 5,6-dimethyl ether on scopolamine (Sco)-induced zebrafish (Danio rerio) anxiety, amnesia, and brain oxidative stress and attempted to elucidate the underlying mechanisms. Anxiety-like behavior, exploratory behavior, and memory performance were measured using novel tank-diving test (NTT), Y-maze, and novel object recognition (NOR) tests. For 10 days, baicalein 5,6-dimethyl ether (1, 3, and 5 µg/L) was administered through immersion, whereas Sco (100 μM) was delivered 30 min before behavioral tests. Treatment with baicalein 5,6-dimethyl ether reduced anxiety and memory impairment, and increased exploratory behavior in specific tests, along with significant protection from neuronal oxidative stress in the brain tissue of Sco-treated zebrafish. Antioxidant and anti-acetylcholinesterase (AChE) activities of baicalein 5,6-dimethyl ether in the Sco-induced zebrafish were further confirmed using in vivo assays. In Sco-treated zebrafish, baicalein 5,6-dimethyl ether regulated cholinergic function by inhibiting AChE activity. Baicalein 5,6-dimethyl ether may be a promising candidate compound for treating anxiety and amnesia by restoring cholinergic activity and reducing brain oxidative stress, according to our findings.

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Crossref · 10.3390/plants10061245

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  • Extracts from Nepeta nuda, Indigofera sessiliflora, Dendropanax morbifera, Pinus densiflora, Dichrocephala integrifolia, Alnus rugosa, Salvia moorcroftiana, and Sanguisorba minor reduced AChE activity and enhanced cognitive function in scopolamine-induced memory impairment models.

    “Other studies on plant extracts like Nepeta nuda, Indigofera sessiliflora, Dendropanax morbifera, Pinus densiflora, Dichrocephala integrifolia, Alnus rugosa, Salvia moorcroftiana, and Sanguisorba minor have similarly reported reduced AChE activity and enhanced cognitive function in SCO-induced memory impairment models [40,41,42,43,44,45,46,47].”

    From Cholinesterase Inhibitors from Plants and Their Potential in Alzheimer’s Treatment: Systematic Review (2025) · cites this paper as [47]

    For Alnus rugosa, the Introduction reports that a stem methanolic extract had anticholinesterase activity. The Results and Conclusions report reduced AChE activity and improved memory in scopolamine-treated zebrafish, but those experiments tested baicalein 5,6-dimethyl ether isolated from A. rugosa, not the extract. This source therefore does not establish both claimed effects for the extract. (LLM, conf=0.88)

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Authors
Brinza, I., Ayoub, I. M., Eldahshan, O. A., & Hritcu, L.
Affiliations
  • Alexandru Ioan Cuza University (RO)
  • Ain Shams University (EG)
  • Department of Biology, Faculty of Biology, Alexandru Ioan Cuza University of Iasi, 700506 Iasi, Romania
Corresponding author
Eldahshan, Omayma A.
Venue
Plants
Publisher
MDPI AG
Published
2021-06-18
Volume
10
Issue
6
Pages
1245
ISSN
2223-7747 (ISSN-L)
OpenAlex
W3176016544
Cited by
29
References
67
Citations by year
2026: 2 · 2025: 6 · 2024: 10 · 2023: 4 · 2022: 6 · 2021: 1
FWCI
3.06
Type
journal article
Language
en
Open access
Locations
  • Plants (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
This research was funded by the Doctoral School of Biology, Alexandru Ioan Cuza University of Iasi, Romania.
Topics
  • Health Sciences › Medicine › Pharmacology › Flavonoids in Medical Research
  • Health Sciences › Medicine › Complementary and alternative medicine › Medicinal Plants and Neuroprotection
  • Health Sciences › Medicine › Pharmacology › Cholinesterase and Neurodegenerative Diseases
Keywords
Alnus rugosa, flavonoids, scopolamine-induced amnesia, memory impairment, anxiety-like behavior, oxidative stress, cholinergic system, acetylcholinesterase inhibition, antioxidant activity, zebrafish, novel object recognition, Y-maze, novel tank diving test

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