SMARTCONTRACTILITY
3D contractile tissue platform
Engineer 3D tissues. Measure contraction.
SmartContractility® is a multiwell platform for generating ring-shaped 3D tissues around deformable hydrogel pillars. Combined with SmartX® image analysis, it enables quantitative assessment of tissue contraction, relaxation kinetics and beating activity from brightfield imaging.
The technology powers SmartHeart®, 4Dcell's human iPSC-derived cardiac microtissue platform, and provides a foundation for developing custom contractile tissue models.
How SmartContractility works
SmartContractility® combines 3D tissue self-assembly, mechanical anchoring and image-based contractility analysis in a multiwell format.
Cells self-assemble into ring-shaped tissues around deformable hydrogel pillars, providing mechanical resistance during contraction. In the SmartHeart® implementation, SmartX 3.0 tracks changes in tissue ring radius from brightfield videos to quantify contraction strain and contractile kinetics. Derived contractile stress is calculated using the calibrated Young's modulus of the hydrogel pillar.
1. Tissue Self-Assembly
Cells are seeded into hydrogel-based microwells, where they self-assemble into 3D ring-shaped tissues around a central pillar.
The anchored geometry supports tissue organization and the development of contractile activity.
2. Mechanical Response
Contracting tissues deform the central hydrogel pillar. The resulting changes in tissue geometry provide a mechanical signal that can be monitored over time using brightfield microscopy.
3. Quantitative Contractility Analysis
SmartX® image analysis tracks tissue deformation across successive video frames to quantify contraction strain, contraction and relaxation kinetics, beating frequency and rhythm regularity. When mechanical calibration is available, contractile stress can also be estimated.
PLATE YOUR CELLS. LET THEM CONTRACT. MEASURE
Designed for reproducible 3D tissue engineering
SmartContractility® integrates guided tissue formation, controlled mechanical anchoring and optical accessibility into a multiwell platform designed for quantitative contractile tissue studies.
Self-Assembled 3D Tissue Architecture
Hydrogel microstructures guide cells into ring-shaped tissues around a central pillar, providing a defined geometry for tissue formation and mechanical assessment.
Multiwell Workflow Compatibility
The plate format supports parallel experimental conditions and integration into standard laboratory imaging workflows, with opportunities for automation depending on the equipment and assay configuration.
Low amount of cells
The multiwell design enables the generation of multiple engineered tissues within a single experiment while reducing the cellular material required per tissue compared with larger conventional engineered tissue formats.
Glass-Bottom Imaging
The optically accessible configuration supports brightfield and fluorescence microscopy, enabling non-destructive contractility analysis and complementary structural or functional investigations.
In Situ Tissue Characterization
Contractile activity can be monitored without removing tissues from their culture environment. Compatible imaging protocols can also support complementary structural characterization.
Quantitative contractility readouts
SmartContractility® enables image-based measurement of tissue deformation to characterize contractile function. In the SmartHeart® cardiac implementation, SmartX® analysis extracts morphological and functional parameters from brightfield videos of contracting ring-shaped microtissues.
Readout
Contraction strain
Contractile stress
Contraction kinetics
Relaxation kinetics
Beating frequency
Rhythm regularity
What it measures
Relative tissue deformation during contraction
Mechanical stress estimated from tissue deformation and calibrated pillar stiffness
Speed and timing of tissue contraction
Speed and timing of tissue relaxation
Frequency of spontaneous contractions
Variability in the intervals between successive contractions
These complementary measurements enable the characterization of tissue mechanical behavior and the detection of functional changes following experimental interventions.
SmartX® Image Analysis
SmartX® uses deep-learning-based image processing to identify ring-shaped tissues, track their deformation and extract quantitative contractility parameters. The software supports analysis of multiple tissues within an imaging field, facilitating parallel measurements and tissue-level data analysis.
SmartContractility® image-based contractility analysis. Brightfield imaging and tracking of tissue deformation enable the extraction of contraction strain and contraction/relaxation kinetics from ring-shaped cardiac microtissues.
Readout availability and assay performance depend on the tissue model, imaging configuration and experimental protocol.
Applications of SmartContractility®
SmartContractility® provides a flexible technology for developing and analyzing 3D contractile tissue models, supporting applications in drug discovery, disease modeling and functional tissue research.
Cardiac tissue models
Generate and characterize human 3D cardiac microtissues for contractility studies, pharmacological testing and functional assessment.
Custom contractile tissue models
Adapt the SmartContractility® platform to develop other contractile tissue models, including skeletal muscle, according to specific biological questions and experimental requirements.
Platform specifications
SmartContractility® combines hydrogel-based tissue guidance, mechanical anchoring and optical accessibility in a multiwell platform designed for 3D contractile tissue culture and analysis.
Parameter
Tissue architecture
Mechanical anchoring
Plate configuration
Imaging
Analysis
Model development
Specification
Self-assembled, ring-shaped 3D tissues
Deformable central hydrogel pillars
Multiwell format; 96-well cardiac implementation
Glass-bottom configuration for optical imaging
Brightfield-based contractility analysis with SmartX®
Application-specific cell types and culture conditions
Scientific validation & publications
The SmartContractility® technology is supported by peer-reviewed research demonstrating the generation of human 3D cardiac microtissues around deformable hydrogel pillars, enabling quantitative contractility measurements in a 96-well format.
Example: Seguret M. et al., eLife (2024)