Evidence map›Paper›PMID 21630031›Full record

ArticleEuropean journal of clinical pharmacology2011

BCHE and CYP2D6 genetic variation in Alzheimer's disease patients treated with cholinesterase inhibitors.

Caterina Chianella, Daniela Gragnaniello, Pierpaolo Maisano Delser, Maria Francesca Visentini, Elisabetta Sette, Maria Rosaria Tola, Guido Barbujani, Silvia Fuselli

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Article in European journal of clinical pharmacology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 3 pooled it
4.3field-weighted citation impact, top 6% 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, 3 syntheses or guidelines pooled it, 49 citations in OpenAlex.

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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

8 authors at 3 institutions in 2 countries.

Caterina ChianellaDepartment of Biology and Evolution, University of Ferrara, via Borsari 46, 44100 Ferrara, Italy.
Daniela Gragnaniello
Pierpaolo Maisano Delser
Maria Francesca Visentini
Elisabetta Sette
Maria Rosaria Tola
Guido Barbujani
Silvia Fuselli
University of Ferrara · ITUniversity of Bologna · ITUniversity of Leicester · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeCholinesterase inhibitors are commonly prescribed to patients with Alzheimer's disease (AD) to enhance cholinergic neurotransmission. Differential response to these treatments has been observed, and claims have been made that individual genetic variants may influence the pharmacokinetic and pharmacodynamic properties of these drugs. Here we assess the effects of genetic variation at two loci involved in the activity of cholinesterase inhibitors on longitudinal clinical change in AD patients being treated with donepezil, galantamine, and rivastigmine.

methodsThis was an open study in which 171 Italian AD patients treated with donepezil (n = 92), galantamine (n = 33), or rivastigmine (n = 46) were enrolled. Response to treatment was quantified by grading the patient's cognitive state (Mini-Mental State Examination) and the patient's ability to perform normal daily activities (Activities of Daily Living, Instrumental Activities of Daily Living) at baseline and after 6 and 12 months of treatment. Genetic variation was comprehensively characterized and analyzed at two loci: CYP2D6, which is involved in donepezil and galantamine metabolism, and BCHE, which codes for an enzyme (butyrylcholinesterase) which is both target and metabolizer of rivastigmine. APOE (coding for apolipoprotein E), which is associated with the risk of AD and inefficacy of specific AD treatments, was genotyped to control for patient stratification. The influence of the CYP2D6 and BCHE genotype on clinical changes after 12 months was evaluated by several tests of association.

resultsAfter 1 year of treatment, 29, 12, and 12 of the patients receiving donepezil, galantamine, and rivastigmine, respectively, showed a cognitive decrement, while eight patients interrupted the therapy before 12 months of treatment. No significant differences between the three treatments were observed in terms of response and tolerability. Non-responders show a higher proportion of BCHE and CYP2D6 mutated alleles, but genetic variation at the two loci was not a reliable predictor of clinical changes in AD patients treated with cholinesterase inhibitors.

conclusionsIndividualized therapy based on CYP2D6 and BCHE genotypes is unlikely to be beneficial for treating Alzheimer's disease patients in routine clinical practice.

Indexed as

Genetic VariationAgedAged, 80 and overAlzheimer DiseaseApolipoproteins EButyrylcholinesteraseCholinesterase InhibitorsCognitionCytochrome P-450 CYP2D6DonepezilFemaleGalantamineGenetic Association StudiesGenotypeHumansIndansApolipoproteins EButyrylcholinesteraseCholinesterase InhibitorsCytochrome P-450 CYP2D6DonepezilGalantamineIndansPhenylcarbamatesPiperidinesRivastigmine

Identifiers

PMID21630031
OpenAlexW2092796376

What OpenQuestion holds

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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.