Glutamate Uptake Is Not Impaired by Hypoxia in a Culture Model of Human Fetal Neural Stem Cell-Derived Astrocytes

Author:

Shrivastava VadanyaORCID,Dey Devanjan,Singal Chitra Mohinder Singh,Jaiswal ParitoshORCID,Singh Ankit,Sharma Jai Bhagwan,Chattopadhyay Parthaprasad,Nayak Nihar Ranjan,Palanichamy Jayanth KumarORCID,Sinha Subrata,Seth Pankaj,Sen SudipORCID

Abstract

Hypoxic ischemic injury to the fetal and neonatal brain is a leading cause of death and disability worldwide. Although animal and culture studies suggest that glutamate excitotoxicity is a primary contributor to neuronal death following hypoxia, the molecular mechanisms, and roles of various neural cells in the development of glutamate excitotoxicity in humans, is not fully understood. In this study, we developed a culture model of human fetal neural stem cell (FNSC)-derived astrocytes and examined their glutamate uptake in response to hypoxia. We isolated, established, and characterized cultures of FNSCs from aborted fetal brains and differentiated them into astrocytes, characterized by increased expression of the astrocyte markers glial fibrillary acidic protein (GFAP), excitatory amino acid transporter 1 (EAAT1) and EAAT2, and decreased expression of neural stem cell marker Nestin. Differentiated astrocytes were exposed to various oxygen concentrations mimicking normoxia (20% and 6%), moderate and severe hypoxia (2% and 0.2%, respectively). Interestingly, no change was observed in the expression of the glutamate transporter EAAT2 or glutamate uptake by astrocytes, even after exposure to severe hypoxia for 48 h. These results together suggest that human FNSC-derived astrocytes can maintain glutamate uptake after hypoxic injury and thus provide evidence for the possible neuroprotective role of astrocytes in hypoxic conditions.

Funder

Department of Biotechnology

Publisher

MDPI AG

Subject

Genetics (clinical),Genetics

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Glial cholesterol redistribution in hypoxic injury in vitro influences oligodendrocyte maturation and myelination;Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease;2024-12

2. Brain organoids for hypoxic-ischemic studies: from bench to bedside;Cellular and Molecular Life Sciences;2023-10-07

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