Contributions of Glucocorticoid Receptors in Cortical Astrocytes to Memory Recall

Autor/inn/en	Taylor, William W.; Imhoff, Barry R.; Sathi, Zakia Sultana; Liu, Wei Y.; Garza, Kristie M.; Dias, Brian G.
Titel	Contributions of Glucocorticoid Receptors in Cortical Astrocytes to Memory Recall
Quelle	In: Learning & Memory, 28 (2021) 4, S.126-133 (8 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1072-0502
DOI	10.1101/lm.053041.120
Schlagwörter	Brain; Memory; Recall (Psychology); Brain Hemisphere Functions; Trauma; Posttraumatic Stress Disorder; Learning Processes; Auditory Stimuli; Conditioning + Suchen Sie Ihr Suchwort? Gehirn; Gedächtnis; Abberufung; Learning process; Lernprozess; Auditive Stimulation
Abstract	Dysfunctions in memory recall lead to pathological fear; a hallmark of trauma-related disorders, like posttraumatic stress disorder (PTSD). Both, heightened recall of an association between a cue and trauma, as well as impoverished recall that a previously trauma-related cue is no longer a threat, result in a debilitating fear toward the cue. Glucocorticoid-mediated action via the glucocorticoid receptor (GR) influences memory recall. This literature has primarily focused on GRs expressed in neurons or ignored cell-type specific contributions. To ask how GR action in nonneuronal cells influences memory recall, we combined auditory fear conditioning in mice and the knockout of GRs in astrocytes in the prefrontal cortex (PFC), a brain region implicated in memory recall. We found that knocking out GRs in astrocytes of the PFC disrupted memory recall. Specifically, we found that knocking out GRs in astrocytes in the PFC (AstroGRKO) after fear conditioning resulted in higher levels of freezing to the CS+ tone when compared with controls (AstroGRintact). While we did not find any differences in extinction of fear toward the CS+ between these groups, AstroGRKO female but not male mice showed impaired recall of extinction training. These results suggest that GRs in cortical astrocytes contribute to memory recall. These data demonstrate the need to examine GR action in cortical astrocytes to elucidate the basic neurobiology underlying memory recall and potential mechanisms that underlie female-specific biases in the incidence of PTSD. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01