info:eu-repo/semantics/article
Memory built in conjunction with a stressor is privileged: Reconsolidation-resistant memories in the crab Neohelice
Fecha
2020-04Registro en:
Gonzalez, Heidi Soledad; Bloise, Leonardo; Maza, Francisco Javier; Molina, Fernando Víctor; Delorenzi, Alejandro; Memory built in conjunction with a stressor is privileged: Reconsolidation-resistant memories in the crab Neohelice; Pergamon-Elsevier Science Ltd; Brain Research Bulletin; 157; 4-2020; 108-118
0361-9230
CONICET Digital
CONICET
Autor
Gonzalez, Heidi Soledad
Bloise, Leonardo
Maza, Francisco Javier
Molina, Fernando Víctor
Delorenzi, Alejandro
Resumen
The dynamics of memory processes are conserved throughout evolution, a feature based on the hypothesis of a common origin of the high-order memory centers in bilateral animals. Reconsolidation is just one example. The possibility to interfere with long-term memory expression during reconsolidation has been proposed as potentially useful in clinical application to treat traumatic memories. However, several pieces of evidence in rodents show that either robust fear memories or stressful events applied before acquisition promote reconsolidationresistant memories, i.e., memories that are resistant to the interfering effect of drugs on memory reconsolidation. Conceivably, the generation of these reconsolidation-resistant fear memories also occurs in humans. Is the induction of reconsolidation-resistant memories part of the dynamics of memory processes conserved throughout evolution? In the semiterrestrial crab Neohelice granulata, memory reconsolidation is triggered by a short reminder without reinforcement. Here, we show that an increase in the salience of the aversive stimulus augmented the memory strength; nonetheless, the protein synthesis inhibitor cycloheximide still disrupted the reconsolidation process. However, crabs stressed by a water-deprivation episode before a strong training session built up a memory that was now reconsolidation-resistant. We tested whether these reconsolidation-resistant effects can be challenged by changing parametric conditions of memory-reminder sessions; multiple memory reactivations without reinforcement were not able to trigger the labilization-reconsolidation of this resistant memory. Overall, the present findings suggest that generation of reconsolidation-resistant memories can be another part of the dynamics of memory processes conserved throughout evolution that protects privileged information from change.
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