Knockdown of zif268 in the Posterior Dorsolateral Striatum Does Not Enduringly Disrupt a Response Memory of a Rewarded T-Maze Task. (1st February 2018)

• Record Type: Journal Article
• Authors: Cahill, Emma N.; Vousden, George H.; Exton-McGuinness, Marc T.J.; Beh, Ian R.C.; Swerner, Casey B.; Macak, Matej; Abas, Sameera; Cole, Cameron C.; Kelleher, Brian F.; Everitt, Barry J.; Milton, Amy L.
• Is Part Of: Neuroscience. Volume 370(2018)
• Page Start: 112
• Page End: 120
• Publication Date: 2018-02-01
• Subjects: aDLS anterior dorsolateral striatum -- aDMS anterior dorsomedial striatum -- ANOVA analysis of variance -- A-O 'action-outcome' -- BLA Basolateral Amygdala -- IEG Immediate Early Genes -- NAc Nucleus Accumbens -- ODN Oligodeoxynucleotides -- pDLS posterior dorsolateral striatum -- pDMS posterior dorsomedial striatum -- S-R 'stimulus-response' -- Zif268 Zinc Finger Protein 225; zif268 -- memory -- striatum -- amygdala -- hippocampus -- T-Maze; Neurochemistry -- Periodicals; Neurophysiology -- Periodicals; Neurology -- Periodicals; Neurochimie -- Périodiques; Neurophysiologie -- Périodiques; Neurochemistry; Neurophysiology; Electronic journals; Periodicals; Electronic journals; 612.8
• DOI: 10.1016/j.neuroscience.2017.07.014
• Languages: English
• ISSNs: 0306-4522

Abstract

Highlights: Zif268 expression in the pDLS is not required for retrieval of habit-like memory. Knockdown of pDLS Zif268 expression reduces habit-like memory restabilization. Zif268 expression increased in the BLA after reward memory retrieval. Despite extended T-Maze training rats did not use a S-R strategy. Abstract: Under certain conditions pavlovian memories undergo reconsolidation, whereby the reactivated memory can be disrupted by manipulations such as knockdown of zif268 . For instrumental memories, reconsolidation disruption is less well established. Our previous, preliminary data identified that there was an increase in Zif268 in the posterior dorsolateral striatum (pDLS) after expression of an instrumental habit-like 'response' memory, but not an instrumental goal-directed 'place' memory on a T-maze task. Here, the requirement for Zif268 in the reconsolidation of a response memory was tested by knockdown of Zif268, using antisense oligodeoxynucleotide infusion into the pDLS, at memory reactivation. Zif268 knockdown reduced response memory expression 72H, but not 7d later. Western blotting revealed a non-significant increase in Zif268 in the pDLS in rats using response memories, but there was no change in Zif268 expression in the hippocampus following retrieval of a place memory. Zif268 expression increased in the basolateral amygdala after memory reactivation whether a response or place strategy was used during reactivation. We propose that Zif268 expression in the basolateral amygdala may be linked to prediction error, generated by the absence of reward at reactivation. Taken together, these results suggest a complex role for Zif268 in the maintenance of instrumental memories.