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E-GEOD-11473 - Transcription profiling of rat CA3 region of the hippocampus following control task or spatial modelling task

Status
Submitted on 16 May 2008, released on 18 June 2008, last updated on 10 June 2011
Organism
Rattus norvegicus
Samples (14)
Array (1)
Protocols (6)
Description
A theoretical framework for the function of the medial temporal lobe system in memory defines differential contributions of the hippocampal subregions with regard to pattern recognition retrieval processes and encoding of new information. To investigate molecular programs of relevance, we designed a spatial learning protocol to engage a pattern separation function to encode new information. After background training, two groups of animals experienced the same new training in a novel environment, however only one group was provided spatial information and demonstrated spatial memory in a retention test. Global transcriptional analysis of the microdissected subregions of the hippocampus exposed a CA3 pattern that was sufficient to clearly segregate spatial learning animals from control. Individual gene and functional group analysis anchored these results to previous work in neural plasticity. From a multitude of expression changes, increases in camk2a, rasgrp1 and nlgn1 were confirmed by in situ hybridization. Furthermore, siRNA inhibition of nlgn1 within the CA3 subregion impaired spatial memory performance, pointing to mechanisms of synaptic remodeling as a basis for rapid encoding of new information in long-term memory. Experiment Overall Design: RNA samples from animals subjected to a spatial learning paradigm were compared to controls using Affymetirx RAE230a chips. An N of 7 was used in each of the two experimental conditions.
Experiment types
transcription profiling by array, unknown experiment type
Contact
MIAME
PlatformsProtocolsVariablesProcessedRaw
Files
Investigation descriptionE-GEOD-11473.idf.txt
Sample and data relationshipE-GEOD-11473.sdrf.txt
Raw data (1)E-GEOD-11473.raw.1.zip
Processed data (1)E-GEOD-11473.processed.1.zip
Array designA-AFFY-25.adf.txt
Links