University of Cologne
Research & Development

The research and the instruments behind cardiac tissue engineering.

Five research programmes paired with five in-house technology platforms — from iPSC expansion and cardiac organoids to bioreactors, hydrogel scaffolds, and genetic engineering. Scroll through the work, then through the tools that make it possible.

Overview

From stem cell to therapy.

The lab's research pipeline runs from iPSCs through differentiated cardiac cells, into organoids and engineered tissues, and out into disease modelling, drug testing, and transplantation. Each stage has its own platform.

Lab research pipeline — from somatic cells through iPSCs to cardiac organoids, drug testing, and disease modelling
Research pipeline
Stem cell to therapyIntegrated platform
Five programmes

Scroll through the work.

Five research areas. One viewer. As you scroll each programme past the fold, the viewer swaps to the confocal channel that best resolves it — nuclei, sarcomere, lineage, drug response, vasculature.

Specimen ORG-047 · D21
Objective 20× / NA 0.75
Nuclei channel
α-Actinin channel
RFP channel
Merged channel
vWF channel
100 μm
Channel Nuclei 461 nm
01 / Manufacturing

Scalable cardiac cell manufacturing.

Robust, reproducible production of human iPSC-derived cardiomyocytes and endothelial cells at a scale compatible with therapeutic and drug-testing applications. The manufacturing platform is the first mile of every downstream programme — it begins, as everything does, with the nuclei you can count.

Output
iPSC-CM · iPSC-EC
Scale
Research → clinical
Status
Validated 2019 / 2022
Channel
Hoechst · 461 nm
02 / 3D Tissue

Organoids and 3D tissue systems.

Self-organising cardiac organoids and engineered microtissues built on hydrogel scaffolds. These three-dimensional systems resolve structure, contractility and the first emerging vascular networks — the sarcomere stripes in α-actinin are the first sign the tissue is behaving like a real heart.

Format
Organoid · microtissue
Readouts
Confocal · contractility
Flagship
Cardiac Organoid Atlas
Channel
α-Actinin 2 · 519 nm
03 / Microenvironment

Microenvironment and disease modelling.

In vitro models that reconstitute physiological and pathological cardiac conditions. We study how mechanical, biochemical and lineage cues shape tissue behaviour — and how those cues break down in disease. The RFP reporter lets us watch the cardiomyocyte fraction in real time.

Modalities
Healthy · diseased
Stimuli
Mechanical · biochemical
Scale
Single tissue → cohort
Channel
TNNT2-mScarlet · 594 nm
04 / Drug & Gene

Drug testing and genetic engineering.

Organoid-based compound validation combined with targeted editing of iPSCs and cardiac lineages. The same 3D systems that mature the tissue are used to interrogate the compounds and the alleles that shape it. All channels together, because every readout matters at once.

Platforms
Organoid · reporter
Editing
Isogenic backgrounds
Readouts
Contractility · conduction
Channel
Composite merge
05 / Cross-species

Cross-species regenerative medicine.

iPSC work in horse and camel, extending the lab's stem cell platform to large domestic species. The programme supports novel regenerative therapies for skin injury and osteoarthritis — and vascularisation, stained here by von Willebrand factor, is the limiting factor for every engineered tissue above a few hundred microns.

Species
Horse · camel
Indications
Skin · osteoarthritis
Stage
Pre-clinical
Channel
vWF · 668 nm
Technology platforms

What we build with.

Each platform is developed in-house, maintained by the team, and connected to the next stage of the pipeline — bioreactor to chip, chip to gel, gel to tissue, tissue to edit.

Bioreactor system in the lab
01 / Bioreactor
Expansion platformIn-house
01 / Bioreactor

Bioreactor systems.

Scalable stirred and perfused culture vessels for iPSC expansion and cardiomyocyte differentiation. The bioreactor is where the lab's cell output is generated; its stability sets the ceiling for everything downstream.

Format
Stirred · perfused
Scale
mL → litre
Output
iPSC · iPSC-CM · iPSC-EC · iPSC-CO
Microfluidic encapsulation schematic
02 / Chip
Encapsulation platformCustom design
02 / Microfluidics

Microfluidic encapsulation.

High-throughput encapsulation of cells and microtissues into hydrogel carriers using microfluidic chips. The encapsulation stage turns free-floating cells into addressable 3D units that can be handled, imaged, and transplanted.

Format
Droplet · chip
Carrier
Hydrogel microcapsules
Throughput
Thousands / hour
Hydrogel scaffold preparation
03 / Gel
Matrix scaffoldTunable
03 / Hydrogels

Hydrogel scaffolds.

Tunable hydrogel matrices with controllable stiffness, degradation and ligand presentation. These scaffolds give cardiac cells the mechanical and biochemical microenvironment that favours maturation into contractile tissue.

Tuning
Stiffness · degradation
Formats
Bulk · microgel · printed
Integration
Chip · organoid
04 / 3D tissue

3D tissue platforms.

Organoid and engineered microtissue assembly systems that combine cells, hydrogel, and geometry into a single 3D specimen.

Architecture
Organoid · microtissue
Assembly
Self-organising
Readouts
Confocal · contractility
Genetic engineering lab equipment
05 / Editing
Isogenic linesIn-house
05 / Genetic engineering

Genetic engineering tools.

Targeted modification of iPSCs and cardiac lineages for reporter introduction, disease allele correction, and mechanistic studies in isogenic backgrounds. The gene-edit stage makes everything we build interpretable.

Method
CRISPR · knock-in
Backgrounds
Isogenic
Applications
Reporter · disease model