The Opportunities and Challenges regarding Induced Platelets from Human Pluripotent Stem Cells

Area of Science:

• Regenerative Medicine
• Hematology
• Stem Cell Biology

Background:

• Platelet transfusions are crucial for treating bleeding disorders but face supply shortages and immunological challenges.
• Human pluripotent stem cells (hPSCs) present an unlimited source for platelet generation, offering potential solutions to these limitations.
• Patient-derived induced pluripotent stem cells (iPSCs) also serve as valuable models for disease pathogenesis research.

Purpose of the Study:

• To review and update the progress in generating functional induced platelets (iPlatelets) from hPSCs.
• To highlight advancements in optimizing iPlatelet production efficiency and quality.
• To discuss strategies for overcoming challenges in large-scale iPlatelet manufacturing and clinical translation.

Main Methods:

• Optimization of culture media, matrix, and introduction of transgenes (e.g., c-MYC, BMI1, BCL-XL) to enhance hPSC-derived platelet production.
• Development of novel scalable culture systems, including 2D flow, 3D rotary, and vertical reciprocal motion bioreactors.
• Application of gene-editing techniques like CRISPR/Cas9 to mitigate allogeneic immunity by targeting genes such as B2M.

Main Results:

• Significant improvements in the efficiency and yield of iPlatelet production through optimized protocols and culture systems.
• Demonstration of iPlatelet functionality through comprehensive evaluation of morphology, structure, and molecular characteristics.
• Successful application of gene editing to address potential immunological barriers for allogeneic transfusions.

Conclusions:

• Induced platelets derived from hPSCs show great promise for clinical applications, addressing the demand and immunological issues associated with traditional platelet transfusions.
• While significant progress has been made in production methods and functional characterization, further development is needed for large-scale manufacturing and clinical implementation.
• Understanding key transcription factors and molecules involved in platelet differentiation is crucial for advancing iPlatelet technology.