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In the central nervous system, extracellular matrix (ECM) molecules, including hyaluronic acid, chondroitin and heparan sulfate proteoglycans, tenascins, reelin and agrin, along with their remodelling enzymes, such as neurotrypsin, neuropsin, plasminogen activators, and metalloproteinases, are secreted by neural and non-neural cells into the extracellular space to form the ECM and signal via ECM receptors. Despite recent advances in the ECM field, the importance of neural ECM for physiological and pathological processes is currently less widely recognized than that of other CNS elements....

Some of the molecules critical for building neuronal contacts have been shown to be affected in psychiatric disorders such as autism and mental retardation. Also, a reduction in synapse number in specific brain regions has been found in patients with brain disorders. Thus, imbalance in synaptic contact formation may result in the formation of abnormal neuronal circuits and the aberrant behavior manifested in these brain diseases. Recent findings also suggest that fine tuning of neuronal circuits rather than a major loss of neurons may be the cause of some of these brain disorders. In...

This book provides a new compilation of information that link changes in the basic structure of synapses and brain diseases. The book shows that specific secreted proteins, and short peptide mimicking the function of neural cell adhesion molecules can significantly enhance the formation of synapses in the brain. It describes recent advances in research that lay necessary scientific groundwork to develop pharmacological treatments.