NYMC Faculty Publications

Human Cortical Interneurons Optimized for Grafting Specifically Integrate, Abort Seizures, and Display Prolonged Efficacy Without Over-Inhibition

Authors

Author Type(s)

Faculty

DOI

10.1016/j.neuron.2022.12.014

Journal Title

Neuron

First Page

807

Last Page

823.e7

Document Type

Article

Publication Date

3-15-2023

Department

Cell Biology and Anatomy

Second Department

Physiology

Third Department

Public Health

Keywords

cortical interneurons, human pluripotent stem cells, monosynaptic tracing, optogenetics, seizure, temporal lobe epilepsy, transplantation

Disciplines

Medicine and Health Sciences

Abstract

Previously, we demonstrated the efficacy of human pluripotent stem cell (hPSC)-derived GABAergic cortical interneuron (cIN) grafts in ameliorating seizures. However, a safe and reliable clinical translation requires a mechanistic understanding of graft function, as well as the assurance of long-term efficacy and safety. By employing hPSC-derived chemically matured migratory cINs in two models of epilepsy, we demonstrate lasting efficacy in treating seizures and comorbid deficits, as well as safety without uncontrolled growth. Host inhibition does not increase with increasing grafted cIN densities, assuring their safety without the risk of over-inhibition. Furthermore, their closed-loop optogenetic activation aborted seizure activity, revealing mechanisms of graft-mediated seizure control and allowing graft modulation for optimal translation. Monosynaptic tracing shows their extensive and specific synaptic connections with host neurons, resembling developmental connection specificity. These results offer confidence in stem cell-based therapy for epilepsy as a safe and reliable treatment for patients suffering from intractable epilepsy.

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