Published online 19 July 2006
© 2006 The Author(s)
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commerical use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Defective splicing, disease and therapy: searching for master checkpoints in exon definition
International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano 99 34012 Trieste, Italy
*To whom correspondence should be addressed. Tel: +39 040 3757337; Fax: +39 040 3757361; Email: baralle{at}icgeb.org
Received May 10, 2006. Revised June 27, 2006. Accepted June 28, 2006.
The number of aberrant splicing processes causing human disease is growing exponentially and many recent studies have uncovered some aspects of the unexpectedly complex network of interactions involved in these dysfunctions. As a consequence, our knowledge of the various cis- and trans-acting factors playing a role on both normal and aberrant splicing pathways has been enhanced greatly. However, the resulting information explosion has also uncovered the fact that many splicing systems are not easy to model. In fact we are still unable, with certainty, to predict the outcome of a given genomic variation. Nonetheless, in the midst of all this complexity some hard won lessons have been learned and in this survey we will focus on the importance of the wide sequence context when trying to understand why apparently similar mutations can give rise to different effects. The examples discussed in this summary will highlight the fine balance of power that is often present between all the various regulatory elements that define exon boundaries. In the final part, we shall then discuss possible therapeutic targets and strategies to rescue genetic defects of complex splicing systems.
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