Bipotent Cell Population for Vascular Network Self-Assembly

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Solution Overview

Problem

Current methods for differentiating human pluripotent stem cells into functional vascular networks face challenges in recreating the microvascular architecture, as they require specific differentiation-inducible feeder layers, embryoid body formation, or genetic manipulation, and struggle to distinguish between perivascular cell types due to overlapping marker expressions.

Innovation Solution

A monolayer culture protocol that avoids embryoid body intermediates and sorting, inducing a bipotent cell population capable of self-assembly into functional vascular networks, allowing for the differentiation of early vascular cells into endothelial cells and pericytes without specific differentiation-inducible feeder layers or genetic manipulation, and defining unique phenotypes for perivascular cell types through morphology and marker expression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If feeder layers or genetic manipulation are used to differentiate stem cells into vascular networks, then differentiation efficiency is improved, but device complexity and ease of manufacture deteriorate

Engineering Contradiction:

Improvedifferentiation efficiencyVSAvoidcomplexity of differentiation protocol

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention extracts and removes the complex feeder layer components and genetic manipulation steps from the differentiation protocol. By eliminating these external supports, the method achieves vascular network differentiation through simplified direct culture conditions, reducing device complexity while maintaining differentiation efficiency

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The stem cells are enabled to differentiate into vascular networks autonomously without requiring external feeder layers or genetic manipulation. The cells self-organize and self-differentiate under defined culture conditions, making the system self-sufficient and eliminating the need for complex external support structures

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If embryoid body formation is used for vascular differentiation, then cell population diversity is improved, but manufacturing precision and reliability deteriorate

Engineering Contradiction:

Improvecell population diversityVSAvoidreproducibility of vascular network formation

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The invention segments the vascular differentiation process into distinct temporal phases with specific growth factor additions. This staged approach provides precise control over differentiation timing and sequence, improving manufacturing precision while maintaining the ability to generate diverse vascular cell types

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The method employs systematic changes in growth factor concentrations and composition over time to guide differentiation. By precisely controlling parameters such as VEGF, bFGF, and TGF-β levels at different stages, the invention achieves reproducible vascular network formation with consistent cell population diversity

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If multiple markers are used to distinguish perivascular cell types, then measurement precision is improved, but device complexity and ease of operation deteriorate

Engineering Contradiction:

Improveaccuracy of cell type identificationVSAvoidsimplicity of cell characterization

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The invention establishes specific culture conditions and growth factor regimens that preliminarily guide cells toward distinct perivascular lineages before characterization. This pre-differentiation approach reduces the complexity of subsequent identification by creating more pronounced phenotypic differences between cell types, requiring fewer markers for accurate distinction

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables reproducible, clinically translatable vascular network formation in engineered matrices, allowing for patient-specific tissue regeneration and improved understanding of vascular biology by bypassing the need for specific differentiation-inducible feeder layers and genetic manipulation.

Implementation Method 1

inducing a bipotent cell population capable of self-assembly into functional vascular networks

Methodology Applied

Scientific EffectSelf-assembly: Self-Assembly

Data Source

PatentUS11060064B2Early vascular cell population

Publication Date: 2021.07.13 JOHNS HOPKINS UNIVERSITY

AI summary

The present invention relates to the area of in vitro cell populations useful for generating vascular networks in vitro and are suitable for use in vivo for regeneration of vascular tissue. In some embodiments, the bipotent cell population of the present invention comprise endothelial cells and pericytes that express vascular endothelial cadherin and are 95% or more positive for CD105 and CD146, and which work syergistically to recreate vascular tissues in vitro.