Photoreceptor Generation from Pluripotent Stem Cells

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Solution Overview

Problem

Current methods for treating retinal diseases, such as retinitis pigmentosa and age-related macular degeneration, lack effective solutions for replacing lost photoreceptor cells, with existing protocols often resulting in incomplete or inefficient regeneration of functional photoreceptors.

Innovation Solution

A method involving the culture of human pluripotent stem cells in a medium with differentiating agents and TGFβ superfamily members to generate and enrich photoreceptor cells, which are then administered therapeutically to treat retinal diseases, utilizing techniques like mechanical isolation and cryopreservation to enhance cell viability and functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing protocols are used for derivation of retinal progenitors and photoreceptors from human embryonic stem cells, then photoreceptor cells can be generated, but the regeneration is incomplete or inefficient

Engineering Contradiction:

Improvephotoreceptor regeneration efficiencyVSAvoidfunctional photoreceptor output

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The differentiation process is divided into distinct sequential stages: initial retinal progenitor generation, followed by specific photoreceptor lineage differentiation. This segmentation allows optimization of each stage independently, improving overall efficiency and functional output of photoreceptors.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Retinal pigment epithelium (RPE) cells are generated and established in culture before photoreceptor differentiation is initiated. This preliminary action creates a supportive environment that enhances subsequent photoreceptor survival, integration, and functional maturation, thereby improving regeneration efficiency.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If photoreceptor cells are transplanted to treat retinal diseases, then cell replacement therapy is achieved, but ensuring sufficient quantity and functionality of photoreceptors remains challenging

Engineering Contradiction:

Improvetherapeutic effectivenessVSAvoidnumber of functional photoreceptors

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

RPE cells are pre-generated and established in culture before photoreceptor differentiation. This preliminary action ensures a sufficient supply of supportive cells are available, which enhances photoreceptor survival and functionality after transplantation, thereby increasing the number of functional photoreceptors delivered therapeutically.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The protocol maintains continuous culture and differentiation conditions that support photoreceptor development and maturation throughout the process. This continuity ensures steady production of functional photoreceptors, providing sufficient quantity for therapeutic application without interruption or loss of functionality.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS11090337B2Preparation of photoreceptors for the treatment of retinal diseases

Publication Date: 2021.08.17 CELL CURE NEUROSCI

AI summary

A method of generating photoreceptors is disclosed. Cell populations comprising photoreceptors and uses thereof are also disclosed.