Evidence map›Paper›PMID 21123766›Full record

Trial reportJournal of lipid research2011

Atorvastatin increases intestinal expression of NPC1L1 in hyperlipidemic men.

André J Tremblay, Benoît Lamarche, Valéry Lemelin, Lizbeth Hoos, Suzanne Benjannet, Nabil G Seidah, Harry R Davis, Patrick Couture

Open access · hybridAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Journal of lipid research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
9.8field-weighted citation impact, top 2% 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

51 citing papers in PubMed, 1 synthesis or guideline pooled it, 100 citations in OpenAlex.

  1. Effect of atorvastatin on testosterone levels.The Cochrane database of systematic reviews · 2021
    Pooled it
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  16. TheFrontiers in pharmacology · 2022
    Article
  17. Frontiers in pharmacology · 2021
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 2 countries.

André J TremblayLipid Research Centre, Laval University, Quebec City, Quebec, Canada.
Benoît Lamarche
Valéry Lemelin
Lizbeth Hoos
Suzanne Benjannet
Nabil G Seidah
Harry R Davis
Patrick Couture
Université Laval · CAMerck & Co., Inc., Rahway, NJ, USA (United States) · USMontreal Clinical Research Institute · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Inhibition of cholesterol synthesis by 3-hydroxy-3-methylglutaryl-CoA reductase (HMG-CoAR) inhibitors has been associated with an increase in intestinal cholesterol absorption. This study examined how HMG-CoAR inhibition by atorvastatin modulates expression of key genes involved in intestinal cholesterol metabolism. A crossover study was conducted in which 22 hyperlipidemic men received atorvastatin, 40 mg/day, or placebo, each for 12 weeks. Gene expression was assessed by real-time PCR using duodenal biopsy samples obtained at the end of each phase of treatment. Treatment with atorvastatin was associated with a 76% reduction in lathosterol and significant increases in sitosterol (70%). Atorvastatin significantly increased intestinal mRNA levels of HMG-CoAR (59%), LDL receptor (LDLR) (52%), PCSK9 (187%), SREBP-2 (44%), and HNF-4α (13%). Furthermore, atorvastatin significantly increased intestinal mRNA levels of NPC1L1 by 19% and decreased mRNA levels of both ABCG5 and ABCG8 by 14%. Positive correlations were observed between changes in SREBP-2 and HNF-4α expression and concurrent changes in the intestinal mRNA levels of HMG-CoAR, LDLR, and NPC1L1. These results indicate that HMG-CoAR inhibition with atorvastatin stimulates the intestinal expression of NPC1L1, LDLR, and PCSK9; increases cholesterol absorption; and reduces expression of ABCG5/8; these effects are most likely mediated by upregulation of the transcription factors SREBP-2 and HNF-4α.

Indexed as

AdultAtorvastatinCholesterolDrug Administration ScheduleDuodenumGene Expression RegulationHeptanoic AcidsHumansHyperlipidemiasIntestinal MucosaIntestinesMaleMembrane ProteinsMembrane Transport ProteinsPyrrolesRNA, MessengerAtorvastatinCholesterolHeptanoic AcidsMembrane ProteinsMembrane Transport ProteinsNPC1L1 protein, humanPyrrolesRNA, Messenger

Identifiers

PMID21123766
PMCPMC3035692
OpenAlexW2012070467

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.