Isolation of endothelial cells, pericytes and astrocytes from mouse brain
Autoři:
Florian Bernard-Patrzynski aff001; Marc-André Lécuyer aff002; Ina Puscas aff001; Imane Boukhatem aff001; Marc Charabati aff002; Lyne Bourbonnière aff002; Charles Ramassamy aff004; Grégoire Leclair aff001; Alexandre Prat aff002; V Gaëlle Roullin aff001
Působiště autorů:
Faculty of Pharmacy, Université de Montréal, Montreal, Québec, Canada
aff001; Department of Neuroscience, Faculty of Medicine, Université de Montréal, Montreal, Québec, Canada
aff002; Institute for Multiple Sclerosis Research and Neuroimmunology, University Medical Center Göttingen, Göttingen, Germany
aff003; Institut National de la Recherche Scientifique, Armand-Frappier Institute, Laval, Québec, Canada
aff004
Vyšlo v časopise:
PLoS ONE 14(12)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0226302
Souhrn
Primary cell isolation from the central nervous system (CNS) has allowed fundamental understanding of blood-brain barrier (BBB) properties. However, poorly described isolation techniques or suboptimal cellular purity has been a weak point of some published scientific articles. Here, we describe in detail how to isolate and enrich, using a common approach, endothelial cells (ECs) from adult mouse brains, as well as pericytes (PCs) and astrocytes (ACs) from newborn mouse brains. Our approach allowed the isolation of these three brain cell types with purities of around 90%. Furthermore, using our protocols, around 3 times more PCs and 2 times more ACs could be grown in culture, as compared to previously published protocols. The cells were identified and characterized using flow cytometry and confocal microscopy. The ability of ECs to form a tight monolayer was assessed for passages 0 to 3. The expression of claudin-5, occludin, zonula occludens-1, P-glycoprotein-1 and breast cancer resistance protein by ECs, as well as the ability of the cells to respond to cytokine stimuli (TNF-α, IFN-γ) was also investigated by q-PCR. The transcellular permeability of ECs was evaluated in the presence of pericytes or astrocytes in a Transwell® model by measuring the transendothelial electrical resistance (TEER), dextran-FITC and sodium fluorescein permeability. Overall, ECs at passages 0 and 1 featured the best properties valued in a BBB model. Furthermore, pericytes did not increase tightness of EC monolayers, whereas astrocytes did regardless of their seeding location. Finally, ECs resuspended in fetal bovine serum (FBS) and dimethyl sulfoxide (DMSO) could be cryopreserved in liquid nitrogen without affecting their phenotype nor their capacity to form a tight monolayer, thus allowing these primary cells to be used for various longitudinal in vitro studies of the blood-brain barrier.
Klíčová slova:
Astrocytes – Confocal microscopy – Endothelial cells – Flow cytometry – Permeability – Primary cells – Pericytes – Electrical resistance
Zdroje
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