Evidence map›Paper›PMID 31182820›Full record

ArticleScientific reports2019

Inverted U-shaped response of a standardized extract of Centella asiatica (ECa 233) on memory enhancement.

Yingrak Boondam, Phanit Songvut, Mayuree H Tantisira, Sompol Tapechum, Kanokwan Tilokskulchai, Narawut Pakaprot

Abstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed.

  1. Trial
  2. Article
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  13. Review
  14. Caffeoylquinic Acids inNutrients · 2020
    Article
  15. Article
  16. Article
  17. Nutrients · 2020
    Article
  18. Therapeutic Potential ofFrontiers in pharmacology · 2020
    Review
  19. Iranian journal of basic medical sciences · 2019
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Yingrak BoondamDepartment of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Phanit SongvutDepartment of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand.
Mayuree H TantisiraFaculty of Pharmaceutical Sciences, Burapha University, Chonburi, Thailand.
Sompol TapechumDepartment of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Kanokwan TilokskulchaiDepartment of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Narawut PakaprotDepartment of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. narawut.pak@mahidol.ac.th.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The herb Centella asiatica has long been considered a memory tonic. A recent review found no strong evidence for improvement of cognitive function, suggesting negative results were due to limitations in dose, standardization and product variation. We used a standardized extract of C. asiatica (ECa 233) to study behavioral, cellular and molecular effects on learning and memory enhancement. ECa 233 (10, 30, and 100 mg/kg) was given orally to normal rats twice a day for 30 days. We used the Morris water maze to test spatial learning and performed acute brain slice recording to measure changes of synaptic plasticity in the hippocampus, a core brain region for memory formation. Plasticity-related protein expressions (NR2A, NR2B, PSD-95, BDNF and TrkB) in hippocampus was also measured. Rats receiving 10 and 30 mg/kg doses showed significantly enhanced memory retention, and hippocampal long-term potentiation; however, only the 30 mg/kg dose showed increased plasticity-related proteins. There was an inverted U-shaped response of ECa 233 on memory enhancement; 30 mg/kg maximally enhanced memory retention with an increase of synaptic plasticity and plasticity-related proteins in hippocampus. Our data clearly support the beneficial effect on memory retention of a standardized extract of Centella asiatica within a specific therapeutic range.

Indexed as

AnimalsBrain-Derived Neurotrophic FactorCentellaDisks Large Homolog 4 ProteinHippocampusLong-Term PotentiationMaleMemoryNeuronal PlasticityPlant ExtractsRats, WistarReceptors, N-Methyl-D-AspartateReceptor, trkBSpatial LearningSpatial MemoryTriterpenesasiaticosideBrain-Derived Neurotrophic FactorDisks Large Homolog 4 ProteinECa 233 extractmadecassosidePlant ExtractsReceptors, N-Methyl-D-AspartateReceptor, trkBTriterpenes

Identifiers

PMID31182820
PMCPMC6557898

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.