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Updated: May 12, 2026
Modified Mouse Embryonic Stem Cell based Assay for Quantifying Cardiogenic Induction Efficiency
Published on: April 22, 2011
Wnt1 inhibits hydrogen peroxide-induced apoptosis in mouse cardiac stem cells
Jingjin Liu1, Yongshun Wang, Wenjuan Du
1Cardiology Department, Second Affiliated Hospital of Harbin Medical University, Harbin, Province Heilongjiang, China.
Background:
Because of their regenerative and paracrine abilities, cardiac stem cells (CSCs) are the most appropriate, optimal and promising candidates for the development of cardiac regenerative medicine strategies. However, native and exogenous CSCs in ischemic hearts are exposed to various pro-apoptotic or cytotoxic factors preventing their regenerative and paracrine abilities.
Methods And Results:
We examined the effects of H2O2 on mouse CSCs (mCSCs), and observed that hydrogen peroxide (H2O2) treatment induces mCSCs apoptosis via the caspase 3 pathway, in a dose-dependent manner. We then examined the effects of Wnt1 over-expression on H2O2-induced apoptosis in mCSCs and observed that Wnt1 significantly decreased H2O2-induced apoptosis in mCSCs. On the other hand, inhibition of the canonical Wnt pathway by the secreted frizzled related protein 2 (SFRP2) or knockdown of β-catenin in mCSCs reduced cells resistance to H2O2-induced apoptosis, suggesting that Wnt1 predominantly prevents H2O2-induced apoptosis through the canonical Wnt pathway.
Conclusions:
Our results provide the first evidences that Wnt1 plays an important role in CSCs' defenses against H2O2-induced apoptosis through the canonical Wnt1/GSK3β/β-catenin signaling pathway.
Insights
Cardiac stem cells (CSCs) are promising for heart repair but face apoptosis. Wnt1 protects CSCs from hydrogen peroxide-induced cell death via the canonical Wnt pathway, enhancing their therapeutic potential.
Area of Science:
- Cardiovascular biology
- Stem cell research
- Regenerative medicine
Background:
- Cardiac stem cells (CSCs) possess regenerative and paracrine potential for cardiac repair.
- Ischemic conditions in the heart expose CSCs to pro-apoptotic factors, hindering their therapeutic efficacy.
Purpose of the Study:
- To investigate the protective role of Wnt1 against apoptosis in mouse cardiac stem cells (mCSCs) induced by hydrogen peroxide (H2O2).
- To elucidate the signaling pathway involved in Wnt1-mediated protection of mCSCs.
Main Methods:
- Exposure of mCSCs to varying doses of H2O2 to induce apoptosis.
- Over-expression of Wnt1 in mCSCs and assessment of apoptosis.
- Inhibition of the canonical Wnt pathway using SFRP2 or β-catenin knockdown.
- Analysis of the Wnt1/GSK3β/β-catenin signaling pathway.
Main Results:
- H2O2 treatment induced apoptosis in mCSCs in a dose-dependent manner via the caspase 3 pathway.
- Wnt1 over-expression significantly reduced H2O2-induced apoptosis in mCSCs.
- Inhibition of the canonical Wnt pathway (SFRP2 or β-catenin knockdown) diminished mCSC resistance to H2O2-induced apoptosis.
Conclusions:
- Wnt1 plays a crucial role in protecting CSCs from H2O2-induced apoptosis.
- This protection is mediated through the canonical Wnt1/GSK3β/β-catenin signaling pathway.
- Findings support Wnt1 as a therapeutic target for enhancing CSC survival in cardiac regenerative medicine.
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