New Context Significantly Changes Expression of Irs2 Gene in Hippocampal Areas.

Anastasia M Shvadchenko, Maria N Volobueva, Violetta O Ivanova, Alexandr P Beletskiy, Gulnur R Smirnova, Natalia V Bal, Pavel M Balaban

Biochemistry. Biokhimiia 2022 Nov

filter terms:

Memory formation is a complex process involving changes in the synaptic activity and gene expression encoding the insulin-like growth factors. We analyzed changes in the expression of genes encoding the insulin/insulin-like growth factors' proteins at the early period of learning in the CA1 region and dentate gyrus of the dorsal and ventral hippocampus in mice 1 hour after presentation of a new context (contextual fear conditioning) with and without negative reinforcement. It was found that in addition to changes in the expression of immediate early genes c-Fos (in all studied hippocampal fields) and Arc (in dorsal and ventral CA1, as well as in dorsal dentate gyrus), exposure to a new context significantly altered expression of the insulin receptor substrate 2 gene (Irs2) in dorsal CA1 and ventral dentate gyrus irrespectively of the negative reinforcement, which suggests participation of the insulin/IGF system in the early stages of neural activation during learning.

Citation

Anastasia M Shvadchenko, Maria N Volobueva, Violetta O Ivanova, Alexandr P Beletskiy, Gulnur R Smirnova, Natalia V Bal, Pavel M Balaban. New Context Significantly Changes Expression of Irs2 Gene in Hippocampal Areas. Biochemistry. Biokhimiia. 2022 Nov;87(11):1243-1251