Grafted hPSC-derived GABA-ergic interneurons regulate seizures and specific cognitive function in temporal lobe epilepsy.

Grafted hPSC-derived GABA-ergic interneurons regulate seizures and specific cognitive function in temporal lobe epilepsy.
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DOI:
10.1038/s41536-022-00234-7
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发表时间:
2022-08-01
影响因子:
7.2
通讯作者:
Shetty, Ashok K.
Shetty, Ashok K.
中科院分区:
医学1区
文献类型:
--
作者:
Upadhya, Dinesh;Attaluri, Sahithi;Liu, Yan;Hattiangady, Bharathi;Castro, Olagide W.;Shuai, Bing;Dong, Yi;Zhang, Su-Chun;Shetty, Ashok K.

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在慢性颞叶癫痫(TLE)中,中间神经元丢失/功能障碍导致自发性复发性癫痫发作(SRS),将中间神经元移植到癫痫海马中可减少SRS并改善认知功能。本研究探讨了移植物衍生的γ-氨基丁酸阳性(GABA能)中间神经元是否直接调节SRS和慢性TLE大鼠模型的认知功能。将人多能干细胞衍生的内侧神经节隆起样GABA能祖细胞移植到慢性癫痫大鼠的大脑中,以促进随后移植物衍生的中间神经元的沉默,所述祖细胞经工程化以表达hM 4D(Gi),hM 4D(Gi)是一种通过CRISPR/Cas9技术仅由设计药物(DREADD)激活的设计受体。这种移植大大减少了SRS和改善了依赖于大脑皮层的认知功能。值得注意的是,沉默移植衍生的中间神经元与设计师的药物增加SRS和诱导的位置记忆障碍,但不影响模式分离功能。DREADD的停用恢复了SRS控制和目标位置存储功能。因此,移植GABA能中间神经元可直接调节SRS和特定的认知功能在TLE。
Interneuron loss/dysfunction contributes to spontaneous recurrent seizures (SRS) in chronic temporal lobe epilepsy (TLE), and interneuron grafting into the epileptic hippocampus reduces SRS and improves cognitive function. This study investigated whether graft-derived gamma-aminobutyric acid positive (GABA-ergic) interneurons directly regulate SRS and cognitive function in a rat model of chronic TLE. Human pluripotent stem cell-derived medial ganglionic eminence-like GABA-ergic progenitors, engineered to express hM4D(Gi), a designer receptor exclusively activated by designer drugs (DREADDs) through CRISPR/Cas9 technology, were grafted into hippocampi of chronically epileptic rats to facilitate the subsequent silencing of graft-derived interneurons. Such grafting substantially reduced SRS and improved hippocampus-dependent cognitive function. Remarkably, silencing of graft-derived interneurons with a designer drug increased SRS and induced location memory impairment but did not affect pattern separation function. Deactivation of DREADDs restored both SRS control and object location memory function. Thus, transplanted GABA-ergic interneurons could directly regulate SRS and specific cognitive functions in TLE.
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