Related Experiment Video

Updated: May 20, 2026

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
12:26

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay

Published on: May 3, 2018

Slug regulates Cyclin D1 expression by ubiquitin-proteasome pathway in prostate cancer cells

G X Ding1, J Liu, C C Feng

  • 1Department of Urology, Huashan Hospital, Fudan University, Shanghai, China.

Panminerva Medica
|July 18, 2012
PubMed
Abstract

Insights

Slug inhibits prostate cancer cell growth by reducing cyclin D1 levels. This regulation occurs via the ubiquitin-proteasome pathway, highlighting a key mechanism in prostate cancer progression.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Cyclin D1 is a key regulator of cell cycle progression.
  • Slug is implicated in prostate cancer cell growth.
  • The interaction pathway between Slug and Cyclin D1 in prostate cancer remains unclear.

Purpose of the Study:

  • To elucidate the pathway through which Slug interacts with Cyclin D1.
  • To investigate the role of Slug in regulating Cyclin D1 expression.
  • To understand the mechanism of Slug-mediated inhibition of prostate cancer cell proliferation.

Main Methods:

  • Prostate cancer cells (DU-145, PC-3) were infected with adenovirus expressing human Slug.
  • Western blot analysis was used to examine protein expression levels.
  • Proteasome inhibitor MG-132 was used to investigate the ubiquitin-proteasome pathway.

Main Results:

  • Overexpression of Slug dose-dependently reduced wild-type HA-Cyclin D1 protein expression in DU-145 and PC-3 cells.
  • Mutant HA-Cyclin D1 (T286A) expression was unaffected by Slug overexpression.
  • MG-132 treatment prevented the downregulation of HA-Cyclin D1 by Slug, indicating involvement of the proteasome.

Conclusions:

  • Slug inhibits prostate cancer cell proliferation by downregulating Cyclin D1 expression.
  • Slug regulates Cyclin D1 expression through the ubiquitin-proteasome pathway.
  • Targeting the Slug-Cyclin D1 interaction may offer therapeutic strategies for prostate cancer.

More Related Videos

Studying Proteolysis of Cyclin B at the Single Cell Level in Whole Cell Populations10:54

Studying Proteolysis of Cyclin B at the Single Cell Level in Whole Cell Populations

Published on: September 17, 2012

In Vivo Detection and Analysis of Rb Protein SUMOylation in Human Cells09:40

In Vivo Detection and Analysis of Rb Protein SUMOylation in Human Cells

Published on: November 2, 2017

Related Concept Videos

Regulated Protein Degradation02:58

Regulated Protein Degradation

It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Positive Regulator Molecules02:39

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
Positive Regulator Molecules01:45

Positive Regulator Molecules

To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
Inhibition of CDK Activity02:34

Inhibition of CDK Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.