Evidence map›Paper›PMID 25526449›Full record

ArticleMedicine2014

The role of cytochromes p450 and aldo-keto reductases in prognosis of breast carcinoma patients.

Viktor Hlaváč, Veronika Brynychová, Radka Václavíková, Marie Ehrlichová, David Vrána, Václav Pecha, Markéta Trnková, Roman Kodet, Marcela Mrhalová, Kateřina Kubáčková and 3 more

Open access · goldAbstract read
In one paragraph

Article in Medicine, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.5field-weighted citation impact, top 20% 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

17 citing papers in PubMed, 33 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

13 authors at 9 institutions in 4 countries.

Viktor HlaváčFrom the Toxicogenomics Unit (VH, VB, RV, ME, DV, PS), National Institute of Public Health; 3rd Faculty of Medicine (VH, VB, ME), Charles University, Prague; Department of Oncology (DV), Palacky University Medical School and Teaching Hospital, Olomouc; Institute for the Care for Mother and Child (VP); Biolab Praha, Ltd (MT); Department of Pathology and Molecular Medicine (RK, MM); Department of Oncology (KK), University Hospital Motol, Prague; Department of Surgery (JG), Hospital Atlas; Tomas Bata University (JG); and Department of Pathology (PV), VELAB Ltd, Zlin, Czech Republic.
Veronika Brynychová
Radka Václavíková
Marie Ehrlichová
David Vrána
Václav Pecha
Markéta Trnková
Roman Kodet
Marcela Mrhalová
Kateřina Kubáčková
Jiří Gatěk
Petr Vážan
Pavel Souček
Charles University · CZAeskuLab (Czechia) · CZAtlas Scientific (United States) · USInstitute of Molecular Medicine · INPalacký University Olomouc · CZSynlab Czech (Czechia) · CZTomas Bata University in Zlín · CZUniversity Hospital in Motol · CZÚstav pro Péči o Matku a Dítě · CZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Metabolism of anticancer drugs affects their antitumor effects. This study has investigated the associations of gene expression of enzymes metabolizing anticancer drugs with therapy response and survival of breast carcinoma patients. Gene expression of 13 aldo-keto reductases (AKRs), carbonyl reductase 1, and 10 cytochromes P450 (CYPs) was assessed using quantitative real-time polymerase chain reaction in tumors and paired adjacent nonneoplastic tissues from 68 posttreatment breast carcinoma patients. Eleven candidate genes were then evaluated in an independent series of 50 pretreatment patients. Protein expression of the most significant genes was confirmed by immunoblotting. AKR1A1 was significantly overexpressed and AKR1C1-4, KCNAB1, CYP2C19, CYP3A4, and CYP3A5 downregulated in tumors compared with control nonneoplastic tissues after correction for multiple testing. Significant association of CYP2B6 transcript levels in tumors with expression of hormonal receptors was found in the posttreatment set and replicated in the pretreatment set of patients. Significantly higher intratumoral levels of AKR1C1, AKR1C2, or CYP2W1 were found in responders to neoadjuvant chemotherapy compared with nonresponders. Patients with high AKR7A3 or CYP2B6 levels in the pretreatment set had significantly longer disease-free survival than patients with low levels. Protein products of AKR1C1, AKR1C2, AKR7A3, CYP3A4, and carbonyl reductase (CBR1) were found in tumors and those of AKR1C1, AKR7A3, and CBR1 correlated with their transcript levels. Small interfering RNA-directed knockdown of AKR1C2 or vector-mediated upregulation of CYP3A4 in MDA-MB-231 model cell line had no effect on cell proliferation after paclitaxel treatment in vitro. Prognostic and predictive roles of drug-metabolizing enzymes strikingly differ between posttreatment and pretreatment breast carcinoma patients. Mechanisms of action of AKR1C2, AKR7A3, CYP2B6, CYP3A4, and CBR1 should continue to be further followed in breast carcinoma patients and models.

Indexed as

Gene Expression Regulation, NeoplasticAldehyde ReductaseAldo-Keto ReductasesBreast NeoplasmsCell ProliferationCytochrome P-450 Enzyme SystemFemaleFlow CytometryHumansImmunoblottingPrognosisProspective StudiesReal-Time Polymerase Chain ReactionRNA, NeoplasmTumor Cells, CulturedAldehyde ReductaseAldo-Keto ReductasesCytochrome P-450 Enzyme SystemRNA, Neoplasm

Identifiers

PMID25526449
PMCPMC4603110
OpenAlexW1970424980

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.