Evidence map›Paper›PMID 12532467›Full record

ArticleWorld journal of gastroenterology2003

Different alterations of cytochrome P450 3A4 isoform and its gene expression in livers of patients with chronic liver diseases.

Li-Qun Yang, Shen-Jing Li, Yun-Fei Cao, Xiao-Bo Man, Wei-Feng Yu, Hong-Yang Wang, Meng-Chao Wu

Open access · hybridAbstract read
In one paragraph

Article in World journal of gastroenterology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 1 pooled it
2.1field-weighted citation impact, top 13% 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

37 citing papers in PubMed, 1 synthesis or guideline pooled it, 71 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

7 authors at 1 institution in 1 country.

Li-Qun YangDepartment of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, the Second Military Medical University, Shanghai 200438, China. liqunyang@yahoo.com
Shen-Jing Li
Yun-Fei Cao
Xiao-Bo Man
Wei-Feng Yu
Hong-Yang Wang
Meng-Chao Wu
Eastern Hepatobiliary Surgery Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimTo determine whether parenchymal cells or hepatic cytochrome P450 protein was changed in chronic liver diseases, and to compare the difference of CYP3A4 enzyme and its gene expression between patients with hepatic cirrhosis and obstructive jaundice, and to investigate the pharmacologic significance behind this difference.

methodsLiver samples were obtained from patients undergoing hepatic surgery with hepatic cirrhosis (n=6) and obstructive jaundice (n=6) and hepatic angeioma (controls, n=6). CYP3A4 activity and protein were determined by Nash and western blotting using specific polychonal antibody, respectively. Total hepatic RNA was extracted and CYP3A4cDNA probe was prepared according the method of random primer marking, and difference of cyp3a4 expression was compared among those patients by Northern blotting.

resultsCompared to control group, the CYP3A4 activity and protein in liver tissue among patients with cirrhosis were evidently reduced. (P<0.01) Northern blot showed the same change in its mRNA levels. In contrast, the isoenzyme and its gene expression were not changed among patients with obstructive jaundice.

conclusionHepatic levels of P450s and its CYP3A4 isoform activity were selectively changed in different chronic liver diseases. CYP3A4 isoenzyme and its activity declined among patients with hepatic cirrhosis as expression of cyp3a4 gene was significantly reduced. Liver's ability to eliminate many clinical therapeutic drug substrates would decline consequently. These findings may have practical implications for the use of drugs in patients with cirrhosis and emphasize the need to understand the metabolic fate of therapeutic compounds. Elucidation of the reasons for these different changes in hepatic CYP3A4 may provide insight into more fundamental aspects and mechanisms of imparied liver function.

Indexed as

Gene ExpressionAdultChronic DiseaseCytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemFemaleHumansLiverLiver DiseasesMaleMiddle AgedProtein IsoformsCYP3A4 protein, humanCYP3A protein, humanCytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemProtein Isoforms

Identifiers

PMID12532467
PMCPMC4611347
OpenAlexW1567879611

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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.