Evidence map›Paper›PMID 27282366›Full record

SynthesisCNS drugs2016

Effect of the CYP2D6 and APOE Polymorphisms on the Efficacy of Donepezil in Patients with Alzheimer's Disease: A Systematic Review and Meta-Analysis.

Tingting Xiao, Bin Jiao, Weiwei Zhang, Beisha Tang, Lu Shen

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in CNS drugs, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 19% of its field
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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. The impact of CYP2D6 on donepezil concentration and its lack of effect on the treatment response and adverse effect in Korean patients with Alzheimer's disease.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2025
    Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. Influence ofPharmacogenomics and personalized medicine · 2019
    Article
  14. Review
  15. Review
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

5 authors at 3 institutions in 1 country.

Tingting XiaoDepartment of Neurology, Xiangya Hospital, Central South University, 87# Xiangya Rd, Changsha, 410008, China.
Bin JiaoDepartment of Neurology, Xiangya Hospital, Central South University, 87# Xiangya Rd, Changsha, 410008, China.
Weiwei ZhangDepartment of Neurology, Xiangya Hospital, Central South University, 87# Xiangya Rd, Changsha, 410008, China.
Beisha TangDepartment of Neurology, Xiangya Hospital, Central South University, 87# Xiangya Rd, Changsha, 410008, China.
Lu ShenDepartment of Neurology, Xiangya Hospital, Central South University, 87# Xiangya Rd, Changsha, 410008, China. shenlu2505@126.com.
Central South University · CNChangsha Medical University · CNXiangya Hospital Central South University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDifferential responses to donepezil treatment in patients with Alzheimer's disease (AD) have been observed in clinical practice. It remains controversial whether, and to what extent, individual variation in the genes responsible for drug metabolism (CYP2D6) or those associated with AD pathogenesis (APOE) modulate the response to donepezil treatment.

objectiveThe aim of this study was to better understand the potential link between donepezil treatment response and CYP2D6 or APOE polymorphisms.

methodsWe performed a meta-analysis based on data collected from 1266 donepezil-treated AD patients, and evaluated the association of CYP2D6 or APOE polymorphisms with treatment effectiveness.

resultsNo significant difference was observed in the responder rate of donepezil treatment between the normal function CYP2D6 alleles group and the decreased/non-functional group [odds ratio (OR) 1.34, 95 % confidence interval (CI) 0.5-3.58; p = 0.56]. However, compared with the increased function CYP2D6 alleles group, the normal function group had a better response to donepezil treatment (OR 1.52, 95 % CI 1.14-2.03; p = 0.005). For the specific CYP2D6 single nucleotide polymorphism rs1080985, patients who carried the G allele had a significantly higher risk of poor response to donepezil treatment. After adjusting the data based on APOE genotype, it was observed that only individuals bearing both the APOE-ε4 allele and the rs1080985-G allele showed a significant increase in the frequency of treatment non-response (OR 1.73, 95 % CI 1.07-2.09; p = 0.03). No independent effect of APOE polymorphism on donepezil clinical responses was found (OR 1.08, 95 % CI 0.85-1.38; p = 0.53). Lastly, in a subgroup analysis based on ethnicity, all results remained consistent.

conclusionThe CYP2D6 genotype may be potentially effective for predicting the response to donepezil treatment in AD patients.

Indexed as

Alzheimer DiseaseAnimalsApolipoproteins ECytochrome P-450 CYP2D6DonepezilHumansIndansNootropic AgentsPharmacogeneticsPiperidinesPolymorphism, Single NucleotideApolipoproteins ECytochrome P-450 CYP2D6DonepezilIndansNootropic AgentsPiperidines

Identifiers

PMID27282366
OpenAlexW2414658991

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.