RT Journal Article SR Electronic T1 Diverse but unique astrocytic phenotypes during embryonic stem cell differentiation, culturing and aging JF bioRxiv FD Cold Spring Harbor Laboratory SP 2021.08.02.454573 DO 10.1101/2021.08.02.454573 A1 Kiara Freitag A1 Pascale Eede A1 Andranik Ivanov A1 Shirin Schneeberger A1 Tatiana Borodina A1 Sascha Sauer A1 Dieter Beule A1 Frank L. Heppner YR 2021 UL http://biorxiv.org/content/early/2021/08/04/2021.08.02.454573.abstract AB Astrocytes are resident glia cells of the central nervous system (CNS) that play complex and heterogeneous roles in brain development, homeostasis and disease. Since their vast involvement in health and disease is becoming increasingly recognized, suitable and reliable tools for studying these cells in vivo and in vitro are of utmost importance. One of the key challenges hereby is to adequately mimic their context-dependent in vivo phenotypes and functions in vitro. To better understand the spectrum of astrocytic variations in defined settings we performed a side-by-side-comparison of embryonic stem cell (ESC)-derived astrocytes as well as primary neonatal and adult astrocytes, revealing major differences on a functional and transcriptomic level, specifically on proliferation, migration, calcium signalling and cilium activity. Our results highlight the need to carefully consider the choice of astrocyte origin and phenotype with respect to age, isolation and culture protocols based on the respective biological question.Competing Interest StatementThe authors have declared no competing interest.