Evidence map›Paper›PMID 32857769›Full record

ArticlePloS one2020

Serum copper, zinc and metallothionein serve as potential biomarkers for hepatocellular carcinoma.

Yasuyuki Tamai, Motoh Iwasa, Akiko Eguchi, Ryuta Shigefuku, Kazushi Sugimoto, Hiroshi Hasegawa, Yoshiyuki Takei

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
5.7field-weighted citation impact, top 3% 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

36 citing papers in PubMed, 70 citations in OpenAlex.

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  10. Study of plasma essential element concentrations to explore markers of acute myocardial infarction.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2025
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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.

Yasuyuki TamaiDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.ORCID 0000-0002-8012-8578
Motoh IwasaDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.
Akiko EguchiDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.
Ryuta ShigefukuDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.
Kazushi SugimotoDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.
Hiroshi HasegawaDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.
Yoshiyuki TakeiDepartment of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan.
Mie University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCopper (Cu) and zinc (Zn) are essential nutrients and cofactors of enzymatic reactions with their binding partner. Metallothionein (MT) plays an important role in protecting against heavy metals and oxidative injury, however it may also portend drug resistance and a worse prognosis for hepatocellular carcinoma (HCC) patients. The aim of this study was to determine the amount of Cu, Zn, Cu/Zn and MT in evaluating a group of patients with HCC, including those treated with lenvatinib.

methodsWe enrolled 175 patients with HCC (139 men, 36 women; mean age 71.1 years; hepatitis C virus n = 85, hepatitis B virus n = 19, hepatitis C virus and hepatitis B virus n = 2, non-alcoholic steatohepatitis n = 39, alcohol n = 25, others n = 5; Child-Pugh A n = 141, Child-Pugh B n = 30, Child-Pugh C n = 4; Barcelona clinic liver cancer (BCLC) stage 0 n = 38, stage A n = 56, stage B n = 39, stage C n = 38, stage D n = 4). We evaluated the associations between Cu, Zn and MT. The study outcome was liver cancer-specific survival. Moreover, we treated 12 HCC patients with lenvatinib and investigated the changes in MT during lenvatinib therapy.

resultsThe serum level of Cu was positively correlated with alanine aminotransferase and the BCLC stage. The serum level of Zn decreased concordant with liver disease progression. Patients with a Cu/Zn ratio≥0.999 had significantly improved rates of survival when compared to patients with a Cu/Zn ratio<0.999 (45.3 vs. 30.1 months, p<0.001). MT was significantly correlated with the Cu/Zn ratio and increased after the administration of lenvatinib. Using multivariate Cox regression analyses, it was determined that the Cu/Zn ratio (hazard ratio [HR]: 1.442, p = 0.008), alpha-fetoprotein (HR: 1.000, p<0.001) and BCLC stage (HR: 2.087, p<0.001) were independent predictors of survival.

conclusionsThe Cu/Zn ratio could serve as a useful predictive marker for survival in cases of HCC. MT levels increased in HCC patients receiving lenvatinib therapy, and maybe a predictor of reduced survival.

Indexed as

AgedBiomarkers, TumorCarcinoma, HepatocellularCopperFemaleHumansLiver NeoplasmsMaleMetallothioneinPhenylurea CompoundsQuinolinesZincBiomarkers, TumorCopperlenvatinibMetallothioneinPhenylurea CompoundsQuinolinesZinc

Identifiers

PMID32857769
PMCPMC7455040
OpenAlexW3081737598

What OpenQuestion holds

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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.