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Pathways from senescence to melanoma: focus on MITF sumoylation
J Leclerc1,2, R Ballotti1,2, C Bertolotto1,2
1INSERM, U1065 (équipe 1), Equipe labélisée ARC 2016, C3M, Nice, France.
Oncogene
|August 22, 2017
Summary
Cutaneous melanoma development hinges on genetic mutations that disable cellular senescence, a key tumor suppressor. A specific microphthalmia-associated transcription factor (MITF) mutation impairs senescence, promoting melanoma growth.
Area of Science:
- Oncology
- Genetics
- Cell Biology
Background:
- Cutaneous melanoma arises from melanocytes, influenced by UV radiation and genetic changes.
- Senescence is a crucial barrier against tumor progression, preventing uncontrolled cell division.
- Melanoma development requires mutations that overcome senescence and promote proliferation.
Purpose of the Study:
- To review genetic alterations in melanoma that affect cellular senescence.
- To describe the microphthalmia-associated transcription factor (MITF) and its role in melanoma.
- To evaluate the impact of MITF sumoylation defects on senescence and melanoma development.
Main Methods:
- Literature review of genetic alterations in melanoma.
- Analysis of the role of microphthalmia-associated transcription factor (MITF) in melanocyte homeostasis and senescence.
- Discussion of sumoylation's impact on MITF activity and senescence evasion.
Main Results:
- Genetic alterations that suppress senescence are mandatory for melanoma development.
- A sumoylation-defective germline mutation in MITF is linked to melanoma susceptibility.
- This MITF variant negatively impacts the senescence program, facilitating tumor progression.
Conclusions:
- Melanoma development is a paradigm of senescence evasion.
- Dysregulation of MITF sumoylation contributes to melanoma pathogenesis by impairing senescence.
- Understanding these mechanisms can inform novel anti-melanoma strategies.
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