Memory-specific temporal profiles of gene expression in the hippocampus.
Many experiments in the past have demonstrated the requirement of de novo gene expression during the long-term retention of learning and memory. Although previous studies implicated individual genes or genetic pathways in learning and memory, they did not uncover the collective behaviors or patterns of the genes. We have used genome-scale screening to analyze gene expression during spatial learning of rats in the Morris water maze. Our results show distinct temporal gene expression profiles associated with learning and memory. Exogenous administration of one peptide whose sustained increase during memory retention was implicated by microarray analysis, fibroblast growth factor (FGF)-18, improved spatial learning behavior, suggesting that pharmacological modulation of pathways and targets identified may allow new therapeutic approaches for improving learning and memory. Results of this study also suggest that while learning and physical activity involve common groups of genes, the behavior of learning and memory emerges from unique patterns of gene expression across time.
Cavallaro
Sebastiano
S
Blanchette Rockefeller Neurosciences Institute, West Virginia University, Rockville, MD 20850 USA. sebi@brni-jhu.org
D'Agata
Velia
V
Manickam
Pachiappan
P
Dufour
Franck
F
Alkon
Daniel L
DL
D000818:Animals; D017209:Apoptosis / Q000235:genetics; D003598:Cytoskeletal Proteins / Q000096:biosynthesis / Q000235:genetics; D005346:Fibroblast Growth Factors / Q000494:pharmacology; D020869:Gene Expression Profiling; D006624:Hippocampus / Q000378:metabolism*; D008297:Male; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology*; D008568:Memory / Q000187:drug effects; D009043:Motor Activity / Q000502:physiology; D009419:Nerve Tissue Proteins / Q000096:biosynthesis* / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D011494:Protein Kinases / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D051381:Rats; D017208:Rats, Wistar; D017981:Receptors, Neurotransmitter / Q000096:biosynthesis / Q000235:genetics; D012153:Retention, Psychology / Q000502:physiology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction / Q000235:genetics; D013037:Spatial Behavior / Q000502:physiology*; D013238:Stereotaxic Techniques; D013550:Swimming; D013997:Time Factors
D003598:Cytoskeletal Proteins; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; D017981:Receptors, Neurotransmitter; C113569:fibroblast growth factor 18; D005346:Fibroblast Growth Factors; D011494:Protein Kinases