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Related Concept Videos

EPS and iPS Cells in Disease Research01:21

EPS and iPS Cells in Disease Research

Embryonic and induced pluripotent stem cells are excellent models for disease research because of their ability to self-renew and differentiate into most cell types. Somatic cells from a patient are isolated and reprogrammed into induced pluripotent stem cells or iPSCs. These iPSCs are later differentiated into the desired cell type, which mirrors the diseased cell of the patient. In this way, disease models have been created for investigating diseases such as Down syndrome, type I diabetes,...

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Recording Network Activity in Spinal Nociceptive Circuits Using Microelectrode Arrays
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Profiling Human iPSC-Derived Sensory Neurons for Analgesic Drug Screening Using a Multi-Electrode Array.

Christian Fofie Kuete, Rafael Granja-Vazquez, Vincent Truong

    Biorxiv : the Preprint Server for Biology
    |November 28, 2024
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    Summary

    A new high-content screening platform uses human stem cell-derived nociceptors to discover effective pain relief medications. This method improves the accuracy of drug testing, aiming to reduce failures in translating preclinical findings to human treatments for chronic pain.

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    Area of Science:

    • Neuroscience
    • Pharmacology
    • Biotechnology

    Background:

    • Chronic pain affects 1.5 billion people globally, with limited effective treatments due to poor translation from preclinical studies to human outcomes.
    • Existing preclinical models often fail to predict human responses, and human primary tissues are scarce and difficult to obtain.
    • Human induced pluripotent stem cell (hiPSC)-derived nociceptors offer a promising alternative, but current protocols yield inconsistent phenotypes.

    Purpose of the Study:

    • To develop and validate a novel high-content screening (HCS) platform for analgesic discovery.
    • To utilize hiPSC-derived nociceptors cultured on multi-well micro-electrode arrays (MEAs) for robust drug screening.
    • To enhance the clinical relevance and efficiency of analgesic drug discovery, bridging the translational gap.

    Main Methods:

    • Developed an "Anatomic" protocol for hiPSC-derived nociceptors with transcriptomic profiles matching human primary sensory neurons.
    • Cultured nociceptors on MEAs, achieving nearly 100% active electrodes within two weeks and stable activity for over two weeks.
    • Validated the platform's reliability with Z' factor analysis (>0.5) and assessed drug responses on ion channels, neurotransmitter receptors, and kinase inhibitors.

    Main Results:

    • The HCS platform demonstrated high electrode activity yield and sustained stable neuronal activity.
    • Pharmacological tests confirmed functional expression of key analgesic targets, including ion channels (Nav, Cav, Kv, TRPV1) and receptors (AMPAR, GABA-R).
    • Transcriptomic analysis confirmed the presence of drug targets, with expression levels comparable to primary human dorsal root ganglion cells.

    Conclusions:

    • The developed HCS platform provides a reliable and clinically relevant method for discovering novel analgesics.
    • This approach significantly improves the efficiency of analgesic drug screening and reduces the risk of preclinical-to-human translation failure.
    • The platform offers a new avenue for effective chronic pain management, addressing a major global health issue.