Related Experiment Video

Updated: Jun 12, 2026

Intracranial Orthotopic Allografting of Medulloblastoma Cells in Immunocompromised Mice
05:10

Intracranial Orthotopic Allografting of Medulloblastoma Cells in Immunocompromised Mice

Published on: October 3, 2010

p75(NTR) induces apoptosis in medulloblastoma cells

Jan Küchler1, Wolfgang Hartmann, Anke Waha

  • 1Department of Neuropathology, University of Bonn Medical Center, Bonn, Germany.

International Journal of Cancer
|June 16, 2010
PubMed

Insights

The low-affinity nerve growth factor receptor p75(NTR) acts as a tumor suppressor in medulloblastomas. Activated Hedgehog signaling in desmoplastic medulloblastoma correlates with p75(NTR) expression, inducing apoptosis.

Area of Science:

  • Neuro-oncology
  • Molecular Biology
  • Cancer Genetics

Background:

  • Medulloblastoma (MB) has major variants: classic (CMB) and desmoplastic (DMB).
  • Desmoplastic medulloblastoma (DMB) exhibits higher p75(NTR) levels than CMB.
  • p75(NTR) is a low-affinity nerve growth factor receptor implicated in neuronal development and apoptosis.

Purpose of the Study:

  • To investigate the role of p75(NTR) as a potential tumor suppressor in medulloblastoma.
  • To correlate p75(NTR) expression with medulloblastoma subtypes and clinical course.
  • To elucidate the regulatory mechanisms of p75(NTR) expression in medulloblastoma.

Main Methods:

  • Screening for p75(NTR) mutations in medulloblastoma samples.
  • Assessing p75(NTR) mRNA expression and DNA methylation status.
  • Immunohistochemistry in murine models and in vitro analysis of cerebellar granule cell precursors (GCPs).
  • Flow cytometry and morphological characterization of MB cells engineered to express p75(NTR).

Main Results:

  • One CMB case showed a p75(NTR) coding sequence mutation.
  • p75(NTR) mRNA levels differentiated DMB from CMB.
  • CpG island hypermethylation was ruled out as a cause for low p75(NTR) expression in CMB.
  • Sonic Hedgehog pathway activation in GCPs elevated p75(NTR) expression.
  • Overexpression of p75(NTR) in CMB cells significantly increased apoptosis.

Conclusions:

  • p75(NTR) expression is linked to activated Hedgehog signaling in DMB.
  • p75(NTR) functions as a biologically relevant inducer of apoptosis in medulloblastoma.
  • p75(NTR) may serve as a therapeutic target for medulloblastoma treatment.

More Related Videos

Isolation, Enrichment, and Maintenance of Medulloblastoma Stem Cells06:32

Isolation, Enrichment, and Maintenance of Medulloblastoma Stem Cells

Published on: September 1, 2010

Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen19:44

Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen

Published on: May 30, 2012

Related Concept Videos

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...
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 Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...