Evidence map›Paper›PMID 22315508›Full record

ArticleMediators of inflammation2012

Nanostructured, self-assembling peptide K5 blocks TNF-α and PGE₂ production by suppression of the AP-1/p38 pathway.

Woo Seok Yang, Yung Chul Park, Ji Hye Kim, Hye Ri Kim, Tao Yu, Se Eun Byeon, Larry D Unsworth, Jaehwi Lee, Jae Youl Cho

Open access · goldAbstract read
In one paragraph

Article in Mediators of inflammation, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.3field-weighted citation impact, top 22% 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

15 citing papers in PubMed, 23 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

9 authors at 4 institutions in 2 countries.

Woo Seok YangDepartment of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
Yung Chul Park
Ji Hye Kim
Hye Ri Kim
Tao Yu
Se Eun Byeon
Larry D Unsworth
Jaehwi Lee
Jae Youl Cho
Sungkyunkwan University · KRKangwon National University · KRChung-Ang University · KRUniversity of Alberta · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Nanostructured, self-assembling peptides hold promise for a variety of regenerative medical applications such as 3D cell culture systems, accelerated wound healing, and nerve repair. The aim of this study was to determine whether the self-assembling peptide K5 can be applied as a carrier of anti-inflammatory drugs. First, we examined whether the K5 self-assembling peptide itself can modulate various cellular inflammatory responses. We found that peptide K5 significantly suppressed the release of tumor-necrosis-factor- (TNF-) α and prostaglandin E₂ (PGE₂) from RAW264.7 cells and peritoneal macrophages stimulated by lipopolysaccharide (LPS). Similarly, there was inhibition of cyclooxygenase- (COX-) 2 mRNA expression assessed by real-time PCR, indicating that the inhibition is at the transcriptional level. In agreement with this finding, peptide K5 suppressed the translocation of the transcription factors activator protein (AP-1) and c-Jun and inhibited upstream inflammatory effectors including mitogen activated protein kinase (MAPK), p38, and mitogen-activated protein kinase kinase 3/6 (MKK 3/6). Whether this peptide exerts its effects via a transmembrane or cytoplasmic receptor is not clear. However, our data strongly suggest that the nanostructured, self-assembling peptide K5 may possess significant anti-inflammatory activity via suppression of the p38/AP-1 pathway.

Indexed as

AnimalsCell LineCells, CulturedCyclooxygenase 2DinoprostoneHEK293 CellsHumansLipopolysaccharidesMacrophages, PeritonealMaleMiceMice, Inbred C57BLNanostructuresNitric OxideNitric Oxide Synthase Type IIp38 Mitogen-Activated Protein KinasesCyclooxygenase 2DinoprostoneK5 peptideLipopolysaccharidesNitric OxideNitric Oxide Synthase Type IIp38 Mitogen-Activated Protein KinasesPeptidesTranscription Factor AP-1Tumor Necrosis Factor-alpha

Identifiers

PMID22315508
PMCPMC3270444
OpenAlexW2065371029

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.