Evidence map›Paper›PMID 26950599›Full record

ArticleOncogenesis2016

Epigenetic suppression of neprilysin regulates breast cancer invasion.

H M Stephen, R J Khoury, P R Majmudar, T Blaylock, K Hawkins, M S Salama, M D Scott, B Cosminsky, N K Utreja, J Britt and 1 more

Open access · goldAbstract read
In one paragraph

Article in Oncogenesis, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 17% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 26 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

11 authors at 1 institution in 1 country.

H M StephenLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
R J KhouryLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
P R MajmudarLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
T BlaylockLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
K HawkinsLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
M S SalamaLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
M D ScottLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
B CosminskyLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
N K UtrejaLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
J BrittLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
R E ConwayLipscomb University, Department of Biology, College of Liberal Arts and Science, 1 University Park Drive, Nashville, TN, USA.
Lipscomb University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In women, invasive breast cancer is the second most common cancer and the second cause of cancer-related death. Therefore, identifying novel regulators of breast cancer invasion could lead to additional biomarkers and therapeutic targets. Neprilysin, a cell-surface enzyme that cleaves and inactivates a number of substrates including endothelin-1 (ET1), has been implicated in breast cancer, but whether neprilysin promotes or inhibits breast cancer cell progression and metastasis is unclear. Here, we asked whether neprilysin expression predicts and functionally regulates breast cancer cell invasion. RT-PCR and flow cytometry analysis of MDA-MB-231 and MCF-7 breast cancer cell lines revealed decreased neprilysin expression compared with normal epithelial cells. Expression was also suppressed in invasive ductal carcinoma (IDC) compared with normal tissue. In addition, in vtro invasion assays demonstrated that neprilysin overexpression decreased breast cancer cell invasion, whereas neprilysin suppression augmented invasion. Furthermore, inhibiting neprilysin in MCF-7 breast cancer cells increased ET1 levels significantly, whereas overexpressing neprilysin decreased extracellular-signal related kinase (ERK) activation, indicating that neprilysin negatively regulates ET1-induced activation of mitogen-activated protein kinase (MAPK) signaling. To determine whether neprilysin was epigenetically suppressed in breast cancer, we performed bisulfite conversion analysis of breast cancer cells and clinical tumor samples. We found that the neprilysin promoter was hypermethylated in breast cancer; chemical reversal of methylation in MDA-MB-231 cells reactivated neprilysin expression and inhibited cancer cell invasion. Analysis of cancer databases revealed that neprilysin methylation significantly associates with survival in stage I IDC and estrogen receptor-negative breast cancer subtypes. These results demonstrate that neprilysin negatively regulates the ET axis in breast cancer, and epigenetic suppression of neprilysin in invasive breast cancer cells enables invasion. Together, this implicates neprilysin as an important regulator of breast cancer invasion and clarifies its utility as a potential biomarker for invasive breast cancer.

Identifiers

PMID26950599
PMCPMC4815048
OpenAlexW2299835951

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.