Evidence map›Paper›PMID 29344181›Full record

ArticleOncology letters2017

L-type amino acid transporter 1 expression is upregulated and associated with cellular proliferation in colorectal cancer.

Suguru Hayase, Kensuke Kumamoto, Katsuharu Saito, Yasuhide Kofunato, Yu Sato, Hirokazu Okayama, Kotaro Miyamoto, Shinji Ohki, Seiichi Takenoshita

Open access · diamondAbstract read
In one paragraph

Article in Oncology letters, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 pooled it
3.1field-weighted citation impact, top 9% 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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 42 citations in OpenAlex.

  1. Pooled it
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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

9 authors at 1 institution in 1 country.

Suguru HayaseDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Kensuke KumamotoDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Katsuharu SaitoDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Yasuhide KofunatoDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Yu SatoDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Hirokazu OkayamaDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Kotaro MiyamotoDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Shinji OhkiDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Seiichi TakenoshitaDepartment of Organ Regulatory Surgery, Fukushima Medical University School of Medicine, Fukushima, Fukushima 960-1295, Japan.
Fukushima Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Previous studies have shown that the L-type amino acid transporter 1 (LAT1) is highly expressed in many types of cancer. Upregulated LAT1 expression is considered to be associated with cancer cell proliferation. In the present study, we investigated LAT1 expression in 210 patients with colorectal cancer (CRC) and 40 patients with colonic adenoma using an immunohistochemical method, and analyzed the associations between LAT1 expression and clinicopathological factors and prognosis. The biological significance of LAT1 was also examined under conditions with sub-normal amounts of essential amino acids using colon cancer cell lines. High expression of LAT1 was observed in 152 of 210 CRC patients (72.4%) and 12 of 40 patients with colonic adenoma (30%), and this difference in the frequency of LAT1 expression between CRC and adenoma was significant (P<0.001). High expression of LAT1 was associated with venous invasion (P=0.027). The restriction of amino acids suppressed cell proliferation in CRC cells with higher LAT1 expression, while cellular proliferation was not suppressed in the cells expressing lower levels of LAT1. Mammalian target of rapamycin (mTOR) expression was also downregulated under restricted availability of amino acids, suggesting that the restriction of amino acids induced an antitumor effect through inhibition of the LAT1/mTOR pathway. In summary, the present study demonstrated that LAT1 expression is frequently upregulated in CRC and is associated with cancer cell proliferation via the mTOR pathway.

Indexed as

colorectal cancerL-type amino acid transporter 1mammalian target of rapamycin

Identifiers

PMID29344181
PMCPMC5755048
OpenAlexW2761666293

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.