Related Experiment Video
Updated: May 26, 2026
09:04
Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies
Published on: April 22, 2017
Calreticulin mediates nerve growth factor-induced neuronal differentiation
Yu-Yin Shih1, Akira Nakagawara, Hsinyu Lee
1Laboratory of Molecular Neurobiology, Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, 11529, Taiwan.
Journal of Molecular Neuroscience : MN
|December 8, 2011
Summary
Calreticulin (CRT) promotes nerve growth factor (NGF)-induced neuronal differentiation by regulating calcium and activating the ERK/MAPK pathway. High CRT and TrkA expression predicts better neuroblastoma survival.
Area of Science:
- Neuroscience
- Molecular Biology
- Cancer Biology
Background:
- Nerve growth factor (NGF)/TrkA signaling is crucial for neural development and implicated in nervous system cancers.
- Abnormalities in this pathway are linked to tumorigenesis, highlighting the need to understand neuronal differentiation regulators.
- Calreticulin (CRT) is a previously identified prognostic factor in neuroblastoma (NB), associated with differentiated histology.
Purpose of the Study:
- To investigate the role of calreticulin (CRT) in NGF-mediated neuronal differentiation.
- To elucidate the molecular mechanisms underlying CRT's function in this process.
- To explore the clinical significance of CRT and its relationship with NGF receptor TrkA in neuroblastoma.
Main Methods:
- Utilized PC-12 cell line to study NGF-stimulated differentiation.
- Assessed CRT expression levels and functional impact via deficiency and overexpression.
- Investigated the involvement of the extracellular signal-regulated kinase (ERK)-dependent mitogen-activated protein kinase (MAPK) pathway.
- Analyzed Ca(2+) regulation capacity of CRT.
- Correlated CRT and TrkA expression with neuroblastoma histology and patient survival data.
Main Results:
- CRT levels were upregulated during NGF-induced differentiation of PC-12 cells via the ERK/MAPK pathway.
- CRT deficiency impaired NGF-elicited neuronal differentiation, while CRT overexpression enhanced it.
- CRT's calcium-regulating function was essential for NGF-induced differentiation.
- CRT and TrkA expression were positively correlated in differentiated neuroblastomas.
- Co-expression of CRT and TrkA synergistically predicted improved 5-year survival in neuroblastoma patients.
Conclusions:
- Calreticulin (CRT) plays a critical, dependent role in regulating NGF-induced neuronal differentiation.
- CRT functions through the ERK/MAPK pathway and its calcium-binding capacity.
- CRT, in conjunction with TrkA, serves as a significant predictive biomarker for improved neuroblastoma prognosis.
