Evidence map›Paper›PMID 29402917›Full record

ArticleScientific reports2018

Insulin-degrading enzyme is not secreted from cultured cells.

Eun Suk Song, David W Rodgers, Louis B Hersh

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

16 citing papers in PubMed, 23 citations in OpenAlex.

  1. Review
  2. Neurolysin Knockout Mice in a Diet-Induced Obesity Model.International journal of molecular sciences · 2023
    Article
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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

3 authors at 1 institution in 1 country.

Eun Suk SongDepartment of Molecular and Cellular Biochemistry and the Center for Structural Biology, University of Kentucky, Lexington, KY, 40536, USA.
David W RodgersDepartment of Molecular and Cellular Biochemistry and the Center for Structural Biology, University of Kentucky, Lexington, KY, 40536, USA. david.rodgers@uky.edu.
Louis B HershDepartment of Molecular and Cellular Biochemistry and the Center for Structural Biology, University of Kentucky, Lexington, KY, 40536, USA. lhersh@uky.edu.
University of Kentucky · US

Funding

Center for Biomedical Research Excellence in the Molecular Basis of Human DiseaseP20GM103486 · NIGMS · UNIVERSITY OF KENTUCKY · PI LOUIS HERSH, LOUIS HERSH LOUIS HERSH · 2012 to 2013
$4.2M
Neuropeptidase FunctionR01NS038041 · NINDS · UNIVERSITY OF KENTUCKY · PI RODGERS, DAVID W · 2001 to 2004
$1.0M
Neuropeptidase FunctionR56NS038041 · NINDS · UNIVERSITY OF KENTUCKY · PI RODGERS, DAVID W · 2007 to 2007
$330k
NIGMS NIH HHS P20 GM103486NINDS NIH HHS R01 NS038041NINDS NIH HHS R56 NS038041
6 · The paper itself

Abstract

Insulin-degrading enzyme (IDE) functions in the catabolism of bioactive peptides. Established roles include degrading insulin and the amyloid beta peptide (Aβ), linking it to diabetes and Alzheimer's disease. IDE is primarily located in the cytosol, and a longstanding question is how it gains access to its peptide substrates. Reports suggest that IDE secreted by an unconventional pathway participates in extracellular hydrolysis of insulin and Aβ. We find that IDE release from cultured HEK-293 or BV-2 cells represents only ~1% of total cellular IDE, far less than has been reported previously. Importantly, lactate dehydrogenase (LDH) and other cytosolic enzymes are released at the same relative level, indicating that extracellular IDE results from a loss of cell integrity, not secretion. Lovastatin increases IDE release from BV-2 cells as reported, but this release is mirrored by LDH release. Cell viability assays indicate lovastatin causes a loss of cell integrity, explaining its effect on IDE release. IDE is present in an exosome-enriched fraction from BV-2 cell conditioned media, however it represents only ~0.01% of the total cellular enzyme and is unlikely to be a significant source of IDE. These results call into question the secretion of IDE and its importance in extracellular peptide degradation.

Indexed as

Secretory PathwayCell SurvivalExosomesHEK293 CellsHumansInsulysinInsulysin

Identifiers

PMID29402917
PMCPMC5799172
OpenAlexW2800673212

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.