Related Experiment Video

Updated: Jul 12, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
14:57

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

Mdm2 plays a positive role as an effector of p53-dependent responses

Luciana E Giono1, James J Manfredi

  • 1Department of Oncological Sciences, Mount Sinai School of Medicine, New York, New York, USA.

Cell Cycle (Georgetown, Tex.)
|September 6, 2007
PubMed

Insights

The Mdm2 protein regulates the p53 tumor suppressor. New research reveals Mdm2

Area of Science:

  • Oncology
  • Molecular Biology
  • Cellular Biology

Background:

  • The Mdm2 protein negatively regulates the p53 tumor suppressor.
  • Mdm2 is a key target for cancer therapy aimed at restoring p53 activity.
  • Previous research focused on ablating Mdm2 or disrupting its interaction with p53.

Purpose of the Study:

  • To discuss new findings on Mdm2's diverse functions.
  • To highlight Mdm2's emerging role in regulating the p53 response.
  • To explore Mdm2's modulation of cyclin-dependent kinase 2 (cdk2) inhibition by p21.

Main Methods:

  • RNA interference (siRNA) for Mdm2 downregulation.
  • Analysis of Mdm2's impact on the p53 pathway.
  • Investigation of Mdm2's interaction with p21 and cdk2.

Main Results:

  • Mdm2 downregulation via siRNA revealed a novel function in the p53 response.
  • Mdm2 modulates the inhibition of cyclin-dependent kinase 2 (cdk2) by p21.
  • Evidence supports a new regulatory role for Mdm2 in the p53 pathway.

Conclusions:

  • Mdm2 plays a more complex role in the p53 response than previously understood.
  • Mdm2's functions extend beyond its interaction with p53.
  • Further research into Mdm2's novel roles could offer new therapeutic strategies in cancer.

More Related Videos

Purification of Ubiquitinated p53 Proteins from Mammalian Cells10:55

Purification of Ubiquitinated p53 Proteins from Mammalian Cells

Published on: March 21, 2022

Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence04:56

Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence

Published on: December 30, 2025

Related Concept Videos

Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
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.
DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
M-Cdk Drives Transition Into Mitosis02:15

M-Cdk Drives Transition Into Mitosis

Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...