Astrocyte arborization enhances Ca$^{2+}$ but not cAMP signaling plasticity

Pirnat, Samo (avtor), Božić, Mićo (avtor), Dolanc, Dorian (avtor), Horvat, Anemari (avtor), Tavčar Verdev, Petra (avtor), Vardjan, Nina (avtor), Verkhratsky, Alexei (avtor), Zorec, Robert (avtor), Stenovec, Matjaž (avtor)

The plasticity of astrocytes is fundamental for their principal function, maintaining homeostasis of the central nervous system throughout life, and is associated with diverse exposomal challenges. Here, we used cultured astrocytes to investigate at subcellular level basic cell processes under controlled environmental conditions. We compared astroglial functional and signaling plasticity in standard serum-containing growth medium, a condition mimicking pathologic conditions, and in medium without serum, favoring the acquisition of arborized morphology. Using opto−/electrophysiologic techniques, we examined cell viability, expression of astroglial markers, vesicle dynamics, and cytosolic Ca$^{2+}$ and cAMP signaling. The results revealed altered vesicle dynamics in arborized astrocytes that was associated with increased resting [Ca$^{2+}$]$_i$ and increased subcellular heterogeneity in [Ca$^{2+}$]$_i$, whereas [cAMP]$_i$ subcellular dynamics remained stable in both cultures, indicating that cAMP signaling is less prone to plastic remodeling than Ca$^{2+}$ signaling, possibly also in in vivo contexts.

• Jezik: Angleški jezik
• Ključne besede: astrocytes, vesicles, confocal microscopy, Ca$^{2+}$, cAMP, electrophysiology
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: MF - Medicinska fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: Str. 2899-2916
• Številčenje: Vol. 69, iss. 12
• PID: 20.500.12556/RUL-144758
• UDK: 616-092
• ISSN pri članku: 0894-1491
• DOI: 10.1002/glia.24076
• COBISS.SI-ID: 73561091
• Datum objave v RUL: 10.03.2023

Gradivo je del revije

• Naslov: Glia
• Skrajšan naslov: Glia
• Založnik: Wiley
• ISSN: 0894-1491
• COBISS.SI-ID: 14837721

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: astrociti, vezikli, konfokalna mikroskopija