SmartHeart: Cardiac micro-tissues

Achieve a breakthrough number of readouts in a single assay

PLATE YOUR CELLS. LET THEM BEAT. MEASURE.

SMARTHEART platform, the EASIEST cardiac organoid to get contractility forces and optical mapping
Contractility assay plate

The SmartHeart is a 3D cardiac assay, which enables both the self-assembly and maturation of functional cardiac organoids based on cardiomyocytes derived from hiPSC as well as the acquisition of the most relevant read-outs, all in a single platform. The hydrogel is optically transparent enabling high resolution imaging of the tissues as well as to observe ionic transients.


The hydrogel shape provides a microenvironment which enables the cells to sediment and aggregate into 
a beating ring within hours.


SmartHeart allows the acquisition of many relevant read-outs, all of this in a single platform. It can be used to test new compounds or assess toxicity of drugs targetting other types of pathologies, as it can be simply scaled to fit HTS and HCS requirements.

 

> READY TO USE

Plate your cells directly on the microstructured substrates 

 

> CIRCULAR 3D MORPHOLOGY MIMICKING HEART PHYSIOLOGY

The specific shape enables a perfect maturation of the cardiomyocytes and allows a wide range of tests

 

> MULTIPLE KEY READ-OUTS IN A SINGLE ASSAY

Measure contractility force, beating frequency, beating amplitude, ionic exchange, image tissue morphology, observe intracellular imaging, … 

 

> PREDICTABLE LOCATION AND EASY TO IMAGE

Cell aggregates are located in predictable positions enabling automated image acquisition (bright field, fluoresence, phase contrast, etc.)

 

> TUNABLE STIFFNESS OF THE SUBSTRATE

Control the substrate stiffness mimicking the in vivo environment of your cell type

Circular 3D morphology moves towards a better model for heart physiology

The SmartHeart was developed in collaboration with the team of Pr. Jean Sébastien HULOT, Heart Failure Translational Research Lab, INSERM U970 |
Paris Cardiovascular Research Center – PARCC (Hôpital Européen Georges Pompidou). 

High resolution imaging, tissue morphology and intracellular imaging

Immunofluorescence imaging of the tissues after 14 days. Z-scan using confocal microscopy. Fibroblasts are added to provide stability to the tissues, by forming a structural layer below the iPSC-CMs.

SmartHeart Troponin Vimentin DAPI

FEATURES & BENEFITS

WORKING PRINCIPLE OF THE SMARTHEART TECHNOLOGY AND FEATURES:

The contractility force, beating rate and beating amplitude are assessed through the deformation of the central pillar, as the mechanical properties of the hydrogel are known and can be adjusted to match the cell model.

4Dcell Cardiotoxicity and cardiac efficacy platform

Scheme of the working principle of the structured hydrogel responsible for the formation of the ring-shaped organoids.

> The cell culture substrate is based on a biocompatible Polyethylene glycol (PEG) hydrogel with molded microwells containing a central pillar. 

> The hydrogel is cell repellent, precluding the adhesion of cells to the substrate. 

> The inclined walls (funnel shape) of the microwells allow the cells to be guided towards the circular cavity, thus decreasing the number of cells lost in the seeding process.  

> The ring shaped organoids are kept in place during medium exchange, addition of drugs, etc. This is achieved because the bottom of the microwells are made of glass, enabling the organoid to anchor to this area. In addition, the central pillar has an ‘s’ shape profile, preventing the rings from sliding up due to contractions. 

> The soft nature of the hydrogel (0.1 kPa to 100 kPa) enables the quantification of the contractility force through the deformation of the central pillar. 

> The gel stiffness can be tuned according to the cell model in place. 

> The cell culture substrates are compatible with image acquisition, as the cells are seeded on areas composed of only glass, the PEG hydrogel surrounding the cells is transparent and #1.5 glass (ideal for most objectives) is used. 

> Cells used are cardiomyocytes derived from hiPSC and fibroblasts.

TECHNICAL SCHEME OF THE SMART[contractility] TECHNOLOGY:

The ring shaped cavities for cell culture are molded on biocompatible hydrogels (polyethylene glycol- PEG), using molds fabricated by high-resolution milling.

Contractility assay hydrogel

ASSEMBLY AND MATURATION OF TISSUES

Maturation of cardiomyocytes - 4Dcell SmartHeart

EXAMPLES OF DRUG TESTS

Effets of calcium, verapamil, isoproterenol, dofetilide on 4Dcell Smartheart

SMARTHEART PLATES:

 

24 and 96 well plates with glass bottom ( #1.5, 0.16 – 0.19 mm)

Each well has 21 (for 24 well plate) and 9 (for 96 well plate) individual microwells for tissue formation

The gels are provided in an aqueous solution that retains their mechanical and optical properties 

DRUG DISCOVERY

 

Muscle atrophy

Metabolism  

 

 

DISEASE MODELS

 

Muscular diseases

Neuromuscular disorders

Metabolic disorders 

> Muscle fibrosis

 

 

CARDIOTOXICITY