Evidence map›Paper›PMID 18451171›Full record

ArticleCancer research2008

Akt3 and mutant V600E B-Raf cooperate to promote early melanoma development.

Mitchell Cheung, Arati Sharma, SubbaRao V Madhunapantula, Gavin P Robertson

Open access · bronzeAbstract read
In one paragraph

Article in Cancer research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 99 papers.

0numbers the graph read from it
0cells of the map it votes in
99citing papers in PubMed
8.3field-weighted citation impact, top 2% 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

99 citing papers in PubMed, 191 citations in OpenAlex.

  1. Article
  2. Article
  3. KRAS Inhibition in Pancreatic Ductal Adenocarcinoma.Journal of clinical medicine · 2026
    Review
  4. Article
  5. A web portal for exploring kinase-substrate interactions.NPJ systems biology and applications · 2024
    Article
  6. Review
  7. Article
  8. Review
  9. Article
  10. Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Review of PIP2 in Cellular Signaling, Functions and Diseases.International journal of molecular sciences · 2020
    Review
  16. Review
  17. Article
  18. Article
  19. Review
  20. Review

39 more citing papers are in PubMed but not listed here.

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

4 authors at 1 institution in 1 country.

Mitchell CheungDepartment of Pharmacology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Arati Sharma
SubbaRao V Madhunapantula
Gavin P Robertson
Pennsylvania State University · US

Funding

Akt3 Signaling as a Therapeutic TargetR01CA127892 · NCI · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI ROBERTSON, GAVIN P. · 2008 to 2012
$1.5M
NCI NIH HHS CA-127892-01A1NCI NIH HHS R01 CA127892
6 · The paper itself

Abstract

B-Raf is the most mutated gene in melanoma; however, the mechanism through which it promotes early melanomas remains uncertain. Most nevi contain activated (V600E)B-Raf but few develop into melanoma, and expression in melanocytes is inhibitory with low protein levels present in surviving cells, suggesting unknown cooperative oncogenic events are necessary for melanoma development. Because many melanomas have (V600E)B-Raf and active Akt3, it is possible that these proteins cooperatively facilitate melanocyte transformation. In this study, Akt3 is shown to phosphorylate (V600E)B-Raf to lower its activity as well as that of the downstream mitogen-activated protein kinase (MAPK) pathway to levels promoting early melanoma development. Expression of active Akt3 in early melanoma cells containing (V600E)B-Raf reduced MAPK signaling and promoted anchorage-independent growth. Furthermore, expression of both (V600E)B-Raf and active Akt3 in melanocytes promoted a transformed phenotype. Mechanistically, aberrant Akt3 activity in early melanomas serves to phosphorylate Ser(364) and Ser(428) on (V600E)B-Raf to reduce activity of (V600E)B-Raf to levels that promote rather than inhibit proliferation, which aids melanocytic transformation. Inhibition of (V600E)B-Raf or Akt3 in advanced melanoma cells in which both pathways were active reduced anchorage-independent growth and tumor development in a cooperatively acting manner. Inhibition of Akt3 alone in these cells led to increased MAPK signaling. In summary, these results suggest that activating B-Raf mutations initially promote nevi development, but the resulting high, intense activation of the MAPK pathway inhibits further tumor progression requiring Akt3 activation to bypass this barrier and aid melanoma development.

Indexed as

AnimalsCell AdhesionCell ProliferationCells, CulturedCell Transformation, NeoplasticChromonesDisease ProgressionGlutamic AcidHumansMAP Kinase Signaling SystemMelanocytesMelanomaMiceMorpholinesMutant ProteinsPhosphoinositide-3 Kinase Inhibitors2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-oneAKT3 protein, humanBRAF protein, humanChromonesGlutamic AcidMorpholinesMutant ProteinsPhosphoinositide-3 Kinase InhibitorsProto-Oncogene Proteins B-rafProto-Oncogene Proteins c-aktValine

Identifiers

PMID18451171
PMCPMC2603082
OpenAlexW2022481874

What OpenQuestion holds

Textmetadata
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.