Pluripotent Stem Cell Targeting via PTH Chemoattractants

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Solution Overview

Problem

Current stem cell therapies lack effective methods for isolating and utilizing pluripotent stem cells that express the parathyroid hormone type 1 receptor (PTH1R) for diverse medical applications such as improving fertility, promoting hair growth, treating skin and bone disorders, and addressing autoimmune and age-related issues.

Innovation Solution

Peripheral blood-derived pluripotent stem cells (PBD-PSCs) expressing PTH1R are isolated and characterized by specific markers, cultured with peptides and growth factors, and targeted to specific areas using parathyroid hormone and parathyroid hormone-related protein as chemoattractants, enabling their use in various therapeutic methods including intravenous, subcutaneous, and intra-arterial administrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional stem cell isolation methods are used, then stem cells can be obtained, but the ability to specifically isolate and utilize PTH1R-expressing pluripotent stem cells is lost

Engineering Contradiction:

Improvestem cell isolation specificityVSAvoidtherapeutic application range

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent uses fluorescent markers (green fluorescent protein and red fluorescent protein) to visually identify and differentiate PTH1R-expressing stem cells from other cell types. This allows for precise isolation of the desired cell population through fluorescence-activated cell sorting or other fluorescence-based separation techniques, directly resolving the contradiction between isolation specificity and therapeutic versatility.

Inventive Principle:

Principle #32Color changes

2Productivity

If stem cells are cultured without specific differentiation induction, then cell proliferation is maintained, but differentiation into specific tissue types (ectoderm, mesoderm, endoderm) does not occur

Engineering Contradiction:

Improvecell proliferation rateVSAvoiddifferentiation capacity

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent employs dynamic culture conditions that can be adjusted over time. Initially, cells are cultured in conditions that promote proliferation and maintenance of pluripotency. Then, differentiation induction media containing specific factors (such as retinoic acid for mesoderm, or other lineage-specific factors) are introduced to guide differentiation into the three germ layers. This dynamic approach allows the system to sequentially achieve both high cell numbers and diverse tissue types.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key culture parameters including media composition, oxygen tension, and growth factor concentrations to control cell fate. By adjusting these parameters, the culture system can transition from a proliferation phase to a differentiation phase, enabling both high productivity and adaptability across different therapeutic applications.

Inventive Principle:

Principle #35Parameter changes

3Area of stationary object

If PBD-PSCs are administered systemically, then broad tissue coverage is achieved, but targeting efficiency to specific affected areas is reduced

Engineering Contradiction:

Improvetissue coverage areaVSAvoidtargeting accuracy

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The patent utilizes parathyroid hormone (PTH) and parathyroid hormone-related protein (PTHrP) as chemoattractant intermediaries. These molecules are administered to the patient and create a concentration gradient that guides PTH1R-expressing stem cells toward areas of tissue damage or disease. The PTH/PTHrP intermediary system simultaneously achieves broad distribution (through systemic administration) and precise targeting (through gradient-based cell migration), resolving the contradiction between coverage area and targeting accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The use of PBD-PSCs leads to improved fertility, hair growth, skin and bone health, reduced autoimmune responses, and delayed aging by differentiating into ectoderm, mesoderm, and endoderm layers, thereby addressing a range of medical conditions with potential for regenerative therapies.

Implementation Method 1

targeted to specific areas using parathyroid hormone and parathyroid hormone-related protein as chemoattractants

Methodology Applied

Scientific EffectChemotaxis:

Data Source

PatentUS20220118028A1Cells expressing parathyroid hormone 1 receptor and uses thereof

Publication Date: 2022.04.21 TITHON BIOTECH INC

AI summary

Disclosed herein are pluripotent stem cells cultured with one or more peptide and methods of isolating said stem cells. Also disclosed are methods of targeting the stem cells to a desired region or area within an organism. Also disclosed are methods of using the isolated stem cells for the improvement of fertility, for the promotion of hair growth, for the treatment or prevention of skin conditions, for the treatment or improvement of bone disorders, for the treatment of malignancies, and for the treatment of neurological disorders.