AI Insight
Researchers developed a programmable vascular chip that recreates disease-relevant blood flow patterns (wall shear stress topology) to study how abnormal flow affects blood vessel cells. The device allows controlled testing of both steady and oscillatory flow conditions while enabling high-resolution imaging and multiple analysis methods. Experiments revealed that oscillatory flow patterns destabilize endothelial cell layers, disrupt mechanical signaling between the cell skeleton and nucleus, soften the nucleus, and increase nanoparticle uptake into cells.
Why it matters
This technology bridges the gap between computational models of blood flow and laboratory experiments, providing a standardized platform for studying vascular diseases like atherosclerosis. The system could accelerate drug testing and disease modeling by making complex, disease-relevant flow conditions reproducible and accessible to researchers without requiring patient-specific tissue samples.
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⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
Vascular chips have advanced endothelial mechanobiology by enabling controlled responses to hemodynamic cues, yet disease-relevant wall shear stress (WSS) modeling remains limited. Simplified one-dimensional flow shear systems, designed mainly for physiological mechanobiology, miss the topological organization of pathological flow, whereas patient-specific vascular models capture complex hemodynamics but sacrifice generality and imaging compatibility. Here we develop a programmable vascular chip that converts disease-associated WSS topology into a physiologically parameterized experimental input. The device reconstructs a representative pathological shear-topology field on endothelial layer, supports stationary and physiologically paced oscillatory flow modes, and integrates matched unidirectional-shear references within the same chip. Using this system, we show that oscillatory WSS topology destabilizes endothelial monolayers, drives asymmetric collective emergent behaviors, impairs actin-nuclear mechanotransduction, accompanied by nuclear softening and enhanced perinuclear nanoparticle uptake. Integrated live-cell imaging, fluorescence analysis, Brillouin microscopy, and transport assays enable multimodal phenotyping across collective, subcellular mechanical and functional scales. By making disease-relevant WSS topology experimentally controllable, this vascular-chip framework bridges computational hemodynamics and experimental mechanomedicine, supporting standardized vascular disease modeling and functional screening.
Source: A vascular chip for disease-relevant flow shear stress topology