Related Experiment Video

Updated: Apr 7, 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

10.2K

Small Molecule Inhibition of MDM2-p53 Interaction Augments Radiation Response in Human Tumors

Lauryn R Werner1, Shyhmin Huang1, David M Francis1

  • 1Department of Human Oncology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.

Molecular Cancer Therapeutics
|July 12, 2015
PubMed

Insights

The drug AMG 232, by inhibiting MDM2-p53 interaction, enhances radiation therapy effectiveness. This combination therapy boosts tumor cell death and reduces tumor growth in preclinical models.

Area of Science:

  • Oncology
  • Molecular Biology
  • Radiotherapy Research

Background:

  • The MDM2-p53 interaction regulates cellular responses to DNA damage.
  • AMG 232 is a small molecule inhibitor targeting the MDM2-p53 interaction.
  • Understanding how to enhance radiation therapy is crucial for cancer treatment.

Purpose of the Study:

  • To evaluate AMG 232's potential to improve radiation response in various human tumors.
  • To investigate the mechanisms by which AMG 232 affects DNA damage signaling and cell death pathways.
  • To assess the combined efficacy of AMG 232 and radiation in preclinical cancer models.

Main Methods:

  • Testing AMG 232 in human tumor cell lines and xenografts.
  • Analyzing DNA damage markers (e.g., γH2AX), senescence, and apoptosis/autophagy.
  • Measuring proliferation, radiosensitivity, and antitumor/antiangiogenesis effects.
  • Assessing modulation of key molecular pathways (FoxM1, ULK-1, DRAM, BAX).

Main Results:

  • AMG 232 inhibited proliferation and increased radiosensitivity by disrupting DNA repair signaling.
  • Combined treatment led to increased DNA damage, senescence, and apoptosis/autophagy.
  • Specific molecular pathways involved in cell death and senescence were modulated.
  • In vivo studies showed superior antitumor and antiangiogenesis effects with combined therapy.

Conclusions:

  • AMG 232 effectively augments radiation response in diverse tumor types with functional p53.
  • The combination therapy demonstrates significant preclinical efficacy, warranting further investigation.
  • AMG 232 represents a promising agent for enhancing radiotherapy outcomes.

More Related Videos

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts10:27

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts

Published on: July 25, 2020

8.1K
Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay05:17

Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay

Published on: February 9, 2021

2.1K

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...
5.4K
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...
10.4K
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...
3.4K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
5.1K
Treatment Resistant Cancers02:56

Treatment Resistant Cancers

Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.9K
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
9.1K