Role of ROC1 protein in the control of cyclin D1 protein expression in skin melanomas

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Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
06:09

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Published on: June 7, 2019

Gisele Nai1, Mariângela Marques

  • 1Department of Pathology, Botucatu Medical School, São Paulo State University (UNESP), Brazil. patologia@unoeste.br

Pathology, Research and Practice
|February 9, 2011
PubMed

Insights

ROC1 protein levels decrease in melanoma, leading to increased cyclin D1. This study highlights ROC1

Area of Science:

  • Oncology
  • Molecular Biology
  • Dermatology

Background:

  • Cyclin D1 is crucial for cell cycle progression.
  • ROC1 (Regulator of Cullins 1) is implicated in cyclin D1 degradation.
  • Altered expression of these proteins may contribute to melanoma development.

Purpose of the Study:

  • To investigate the relationship between ROC1 and cyclin D1 expression in skin melanomas.
  • To determine if ROC1 levels correlate with cyclin D1 levels in melanoma and melanocytic nevi.

Main Methods:

  • Immunohistochemistry was used to assess ROC1 and cyclin D1 protein expression in 62 melanomas and 58 nevi.
  • Fluorescent in situ hybridization (FISH) was employed to detect CCND1 gene amplification.

Main Results:

  • ROC1 expression was significantly lower in melanomas (45.2%) compared to melanocytic nevi (87.9%).
  • A significant negative correlation was observed between ROC1 and cyclin D1 expression in all samples.
  • In non-amplified melanomas, reduced ROC1 correlated with increased cyclin D1 expression.

Conclusions:

  • ROC1 plays a role in regulating cyclin D1 levels in melanoma.
  • Decreased ROC1 expression contributes to elevated cyclin D1 in melanoma, independent of gene amplification.
  • ROC1's function in cyclin D1 degradation is critical in melanoma pathogenesis.

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