Rapid upregulation of the hippocampal connexins 36 and 45 mRNA levels during memory consolidation
| Autor: | Abolghasem Esmaeili, Reyhaneh Zeinali, Siamak Beheshti |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Male Time Factors Connexin Hippocampal formation Biology Hippocampus Connexins 03 medical and health sciences Behavioral Neuroscience 0302 clinical medicine Downregulation and upregulation Complementary DNA Avoidance Learning Hippocampus (mythology) Animals RNA Messenger Rats Wistar Memory Consolidation Gap junction Cell biology Rats Up-Regulation 030104 developmental biology Mrna level Memory consolidation sense organs Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Behavioural brain research. 320 |
| ISSN: | 1872-7549 |
| Popis: | Gap junction channels are implicated in learning and memory process. However, their role on each of the particular stages of memory formation has been studied less. In this study, the time profile of the expression levels of hippocampal connexins 36 and 45 (Cx36 and Cx45) mRNAs was measured during memory consolidation, in a passive avoidance paradigm. Totally 30 adult male rats were distributed into 5 groups of each 6. At different times profiles (30min, 3, 6 and 24h) following training, rats were decapitated and their hippocampi were immediately removed and frozen in liquid nitrogen. Total RNA was extracted and cDNA was synthesized, using oligo-dt primers. A quantitative real-time PCR was used to measure the levels of each of Cx36 and Cx45 mRNAs. Both connexins showed a rapid upregulation (30min) at the transcriptional level, which declined in later times and reached to the control level at 24h. The rapid up-regulation of Cx36 and Cx45 mRNAs might be accompanied with increasing intercellular coupling via gap junction channels and neuronal oscillatory activities required for memory consolidation. The results highlight the role of gap junctional coupling between hippocampal neurons during memory consolidation in the physiological conditions. |
| Databáze: | OpenAIRE |
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