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Up-regulated deubiquitinase USP4 plays an oncogenic role in melanoma

Weinan Guo1, Jinyuan Ma1, Tianli Pei1

  • 1Department of Dermatology, Xijing hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.

Journal of Cellular and Molecular Medicine
|March 16, 2018
PubMed

Insights

Increased deubiquitinase USP4 expression promotes melanoma metastasis and reduces apoptosis sensitivity. Targeting USP4 may offer new therapeutic strategies for aggressive melanoma.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Melanoma is an aggressive skin cancer with increasing incidence and limited treatment options for metastatic disease.
  • Ubiquitination, regulated by deubiquitinating enzymes like USP family members, plays a crucial role in cancer development.
  • Understanding melanoma pathogenesis is vital for developing effective therapies.

Purpose of the Study:

  • To investigate the role of deubiquitinase USP4 in melanoma pathogenesis.
  • To explore USP4's impact on melanoma cell apoptosis and metastasis.
  • To elucidate the molecular mechanisms underlying USP4's function in melanoma.

Main Methods:

  • Analysis of USP4 expression in melanoma tissues and cell lines.
  • Assessment of USP4 knockdown effects on melanoma cell proliferation and cisplatin sensitivity.
  • Investigation of USP4's role in regulating p53 signaling and cisplatin-induced apoptosis.
  • Evaluation of USP4's influence on melanoma cell invasion and migration, including epithelial-mesenchymal transition.

Main Results:

  • USP4 expression was significantly upregulated in melanoma tissues and cell lines.
  • USP4 knockdown increased melanoma cell sensitivity to cisplatin by regulating p53 signaling and apoptosis.
  • USP4 knockdown did not significantly affect melanoma cell proliferation.
  • USP4 overexpression enhanced melanoma cell invasion and migration by promoting epithelial-mesenchymal transition.

Conclusions:

  • Upregulated USP4 acts as an oncogene in melanoma.
  • USP4 suppresses stress-induced apoptosis and promotes tumor metastasis in melanoma.
  • USP4 represents a potential therapeutic target for melanoma treatment.
Keywords:
USP4melanomametastasisp53ubiquitination

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