December 8, 2025Arteriosclerosis Thrombosis and Vascular Biology

Unidirectional Shear Stress–Operated NOTCH/CXCR4 Molecular Switch Controls Semilunar Valve Maturation and Collagen Stratification

Q: What is the clinical evidence from this study?

Study design: Other. Population: Fetal semilunar heart valve maturation. Intervention: Conditional Notch and Cxcr4 deletions / Unidirectional laminar shear stress. Primary outcome: Valve maturation, matrix remodeling, and tissue compaction.

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Key result

High laminar shear stress halts valve mesenchymal growth and directs matrix remodeling via NOTCH1/CXCR4 signaling.

Population

Preclinical models: valve cell-type specific conditional Notch and Cxcr4 mouse deletions, ex vivo chick…

Comparison

Genetic deletion of Notch and Cxcr4, and… vs Wild-type/control models (implied)

Design

Preclinical

Authors

CDCharles R. Dai DPDuc H. Pham GJG Janani

Discussion

Member takes

Implication

Unidirectional laminar shear stress activates a NOTCH1/CXCR4 molecular switch that directs fetal semilunar valve maturation and extracellular matrix remodeling.

Key Points

Unidirectional shear stress regulates the NOTCH/CXCR4 molecular switch, impacting valve maturation.
Endocardial signaling through NOTCH1 controls disturbances in extracellular matrix in valves, indicating a novel regulation mechanism.
Observational analysis across various developmental stages identified specific deletions and cellular responses in valve mesenchyme.
Findings underscore the significance of hemodynamic forces in valve remodeling during fetal development.

Structured PICO

Population

Preclinical models: valve cell-type specific conditional Notch and Cxcr4 mouse deletions, ex vivo chick endocardial cells, and valve organoids

Intervention

Genetic deletion of Notch and Cxcr4, and application of unidirectional laminar shear stress

Comparator

Wild-type/control models (implied)

Outcome

Valve maturation, matrix remodeling, and tissue compactionsurrogate

Unidirectional laminar shear stress activates a NOTCH1/CXCR4 molecular switch that directs fetal semilunar valve maturation and extracellular matrix remodeling.

Cite This Study

Dai et al. (2025) studied Fetal semilunar heart valve maturation. Conditional Notch and Cxcr4 deletions / Unidirectional laminar shear stress was evaluated on Valve maturation, matrix remodeling, and tissue compaction. High-magnitude unidirectional laminar shear stress activates a NOTCH1/CXCR4 molecular switch that stops valve mesenchymal growth and orchestrates extracellular matrix remodeling.

synapsesocial.com/papers/693624ad4fa91c937236c583 https://doi.org/10.1161/atvbaha.125.322829

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Implication

Unidirectional laminar shear stress activates a NOTCH1/CXCR4 molecular switch that directs fetal semilunar valve maturation and extracellular matrix remodeling.

Unidirectional Shear Stress–Operated NOTCH/CXCR4 Molecular Switch Controls Semilunar Valve Maturation and Collagen Stratification

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Unidirectional Shear Stress–Operated NOTCH/CXCR4 Molecular Switch Controls Semilunar Valve Maturation and Collagen Stratification

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider