Related Experiment Video

Updated: Jul 8, 2026

Analysis of Cell Cycle Position in Mammalian Cells
12:19

Analysis of Cell Cycle Position in Mammalian Cells

Published on: January 21, 2012

BMP-2 mediates retinoid-induced apoptosis in medulloblastoma cells through a paracrine effect

Andrew R Hallahan1, Joel I Pritchard, Roshantha A S Chandraratna

  • 1Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA.

Nature Medicine
|July 23, 2003
PubMed

Insights

Retinoids induce apoptosis in medulloblastoma cells by activating bone morphogenetic protein-2 (BMP-2). This pathway also eliminates surrounding retinoid-resistant tumor cells, offering a novel therapeutic strategy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Developmental Biology

Background:

  • The precise mechanisms underlying retinoid efficacy in cancer therapy, particularly medulloblastoma, are not fully elucidated.
  • Understanding retinoid signaling pathways is crucial for developing targeted cancer treatments.

Purpose of the Study:

  • To investigate the molecular mechanisms by which retinoids induce apoptosis in medulloblastoma cells.
  • To identify key mediators of retinoid-induced tumor suppression.
  • To explore the potential of targeting retinoid pathways for medulloblastoma treatment.

Main Methods:

  • Utilized receptor-specific retinoid agonists to identify retinoid-responsive gene expression.
  • Employed a xenograft model to assess retinoid effects on tumor growth.
  • Investigated the role of bone morphogenetic protein-2 (BMP-2) and p38 mitogen-activated protein kinase (MAPK) in retinoid-induced apoptosis.

Main Results:

  • Retinoids were found to induce extensive apoptosis in medulloblastoma cells and significantly inhibit tumor growth in vivo.
  • Bone morphogenetic protein-2 (BMP-2) was identified as a critical mediator, inducing apoptosis and activating p38 MAPK.
  • BMP-2 expression by retinoid-sensitive cells was sufficient to induce apoptosis in surrounding retinoid-resistant cells.

Conclusions:

  • Retinoid-induced BMP-2 expression is essential and sufficient for apoptosis in retinoid-responsive medulloblastoma cells.
  • BMP-2 secreted by sensitive cells can eliminate adjacent resistant cells, suggesting a paracrine mechanism.
  • This study elucidates a novel retinoid-BMP-2-MAPK signaling axis critical for medulloblastoma cell death and tumor control.

More Related Videos

Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies09:04

Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies

Published on: April 22, 2017

Reconstruct Human Retinoblastoma In Vitro06:52

Reconstruct Human Retinoblastoma In Vitro

Published on: October 11, 2022

Related Concept Videos

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.
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...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
Receptor Downregulation in MVBs01:15

Receptor Downregulation in MVBs

Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR activation may...
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...