Evidence map›Paper›PMID 27918305›Full record

ArticleThe Journal of clinical investigation2017

Tuberous sclerosis complex inactivation disrupts melanogenesis via mTORC1 activation.

Juxiang Cao, Magdalena E Tyburczy, Joel Moss, Thomas N Darling, Hans R Widlund, David J Kwiatkowski

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
2.8field-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

33 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. Clinical spectrum of MTOR-related hypomelanosis of Ito with neurodevelopmental abnormalities.Genetics in medicine : official journal of the American College of Medical Genetics · 2021
    Article
  11. Article
  12. Article
  13. Review
  14. CrossTORC and WNTegration in Disease: Focus on Lymphangioleiomyomatosis.International journal of molecular sciences · 2021
    Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Serum Proteomic Profiling Analysis of Rats Chronically Exposed to Arsenic.Medical science monitor : international medical journal of experimental and clinical research · 2019
    Article
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

6 authors at 1 institution in 1 country.

Juxiang Cao
Magdalena E Tyburczy
Joel Moss
Thomas N Darling
Hans R Widlund
David J Kwiatkowski
Harvard University · US

Funding

Characterization of the Pathogenesis of Lymphangioleiomyomatosis (LAM)ZIAHL002541 · NHLBI · NATIONAL HEART, LUNG, AND BLOOD INSTITUTE · PI MOSS, JOEL · 2009 to 2025
$47.7M
Tuberous Sclerosis-Pathway and PathogenesisP01CA120964 · NCI · BRIGHAM AND WOMEN'S HOSPITAL · PI David J. Kwiatkowski · 2007 to 2026
$35.9M
Regulation of Dermal Fibroblasts in Skin Regeneration and HealingR01AR062080 · NIAMS · HENRY M. JACKSON FDN FOR THE ADV MIL/MED · PI DARLING, THOMAS N · 2012 to 2016
$1.7M
NCI NIH HHS P01 CA120964NIAMS NIH HHS R01 AR062080
6 · The paper itself

Abstract

Tuberous sclerosis complex (TSC) is an autosomal dominant tumor-suppressor gene syndrome caused by inactivating mutations in either TSC1 or TSC2, and the TSC protein complex is an essential regulator of mTOR complex 1 (mTORC1). Patients with TSC develop hypomelanotic macules (white spots), but the molecular mechanisms underlying their formation are not fully characterized. Using human primary melanocytes and a highly pigmented melanoma cell line, we demonstrate that reduced expression of either TSC1 or TSC2 causes reduced pigmentation through mTORC1 activation, which results in hyperactivation of glycogen synthase kinase 3β (GSK3β), followed by phosphorylation of and loss of β-catenin from the nucleus, thereby reducing expression of microphthalmia-associated transcription factor (MITF), and subsequent reductions in tyrosinase and other genes required for melanogenesis. Genetic suppression or pharmacological inhibition of this signaling cascade at multiple levels restored pigmentation. Importantly, primary melanocytes isolated from hypomelanotic macules from 6 patients with TSC all exhibited reduced TSC2 protein expression, and 1 culture showed biallelic mutation in TSC2, one of which was germline and the second acquired in the melanocytes of the hypomelanotic macule. These findings indicate that the TSC/mTORC1/AKT/GSK3β/β-catenin/MITF axis plays a central role in regulating melanogenesis. Interventions that enhance or diminish mTORC1 activity or other nodes in this pathway in melanocytes could potentially modulate pigment production.

Indexed as

Signal TransductionSkin PigmentationAdolescentAdultAllelesbeta CateninCell Line, TumorFemaleGlycogen Synthase Kinase 3 betaHumansMaleMechanistic Target of Rapamycin Complex 1MelaninsMelanocytesMicrophthalmia-Associated Transcription FactorMiddle Agedbeta CateninGlycogen Synthase Kinase 3 betaGSK3B protein, humanMechanistic Target of Rapamycin Complex 1MelaninsMicrophthalmia-Associated Transcription FactorMITF protein, humanMultiprotein ComplexesProto-Oncogene Proteins c-aktTOR Serine-Threonine KinasesTSC1 protein, humanTSC2 protein, humanTuberous Sclerosis Complex 1 ProteinTuberous Sclerosis Complex 2 ProteinTumor Suppressor Proteins

Identifiers

PMID27918305
PMCPMC5199706
OpenAlexW2558258140

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.