Research article summary:

Cyclic AMP response element-binding (CREB)-like proteins in a molluscan brain: cellular localization and learning-induced phosphorylation.

Abstract Extract:
The phosphorylation and the binding to DNA of the nuclear transcription factor, cyclic adenosine 3,5-monophosphate (cAMP) response element-binding protein (CREB) are conserved key steps in the molecular cascade leading to the formation of long-term ... (Full abstract text below)

Published 2003Sep in Journal: Eur J Neurosci (Language : eng)

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1. Eur J Neurosci. 2003 Sep;18(5):1223-34

Cyclic AMP response element-binding (CREB)-like proteins in a molluscan brain: cellular localization and learning-induced phosphorylation.

Ribeiro MJ, Serfozo Z, Papp A, Kemenes I, O'Shea M, Yin JC, Benjamin PR, Kemenes G

Sussex Centre for Neuroscience, School of Biological Sciences, University of Sussex, Falmer, Brighton, UK.

The phosphorylation and the binding to DNA of the nuclear transcription factor, cyclic adenosine 3',5'-monophosphate (cAMP) response element-binding protein (CREB) are conserved key steps in the molecular cascade leading to the formation of long-term memory (LTM). Here, we characterize, for the first time, a CREB1-like protein in the central nervous system (CNS) of Lymnaea, a model system used widely for the study of the fundamental mechanisms of learning and memory. We demonstrate cAMP response element (CRE)-binding activity in CNS protein extracts and show that one of the CRE-binding proteins is recognized by a polyclonal antibody raised to mammalian (human) CREB1. The same antibody detects specific CREB1 immunoreactivity in CNS extracts and in the nuclei of most neurons in the brain. Moreover, phospho-CREB1-specific immunoreactivity is increased significantly in protein extracts of the CNS by forskolin, an activator of adenylate cyclase. The forskolin-induced increase in phospho-CREB1 immunoreactivity is localized to the nuclei of CNS neurons, some of which have an important role in the formation of LTM. Significantly, classical food-reward conditioning increases phospho-CREB1 immunoreactivity in Lymnaea CNS protein extracts. This increase in immunoreactivity is specific to the ganglia that contain the feeding circuitry, which undergoes cellular changes after classical conditioning. This work establishes the expression of a highly conserved functional CREB1-like protein in the CNS of Lymnaea and opens the way for a detailed analysis of the role of CREB proteins in LTM formation in this model system.

PMID : 12956721 [PubMed - Indexed for MEDLINE]

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Full Author Information

First Name	LastName	Initials
Maria J	Ribeiro	MJ
Zoltán	Serfozo	Z
Andrea	Papp	A
Ildikó	Kemenes	I
Michael	O'Shea	M
Jerry C P	Yin	JC
Paul R	Benjamin	PR
György	Kemenes	G

Affiliation: Sussex Centre for Neuroscience, School of Biological Sciences, University of Sussex, Falmer, Brighton, UK.

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Category links from this article:

Animals
Behavior, Animal
Binding Sites
Cell Count
Cell Nucleus - metabolism
Central Nervous System - cytology, metabolism
Conditioning, Classical - physiology
Cyclic AMP Response Element-Binding Protein - immunology, metabolism
Densitometry
Dose-Response Relationship, Drug
Electrophoretic Mobility Shift Assay - methods
Forskolin - analogs & derivatives, pharmacology
Humans
Immunoblotting - instrumentation, methods
Immunohistochemistry - instrumentation, methods
Memory - physiology
Mutation
Neurons - cytology, metabolism
Oligonucleotide Probes - metabolism
Phosphoric Monoester Hydrolases - metabolism
Phosphorylation
Snails
Time Factors

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