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Published on: October 9, 2014
Abnormalities in Alternative Splicing of Apoptotic Genes and Cardiovascular Diseases
Zodwa Dlamini1, Shonisani C Tshidino2, Rodney Hull3
1Research, Innovation and Engagements, Mangosuthu University of Technology, Durban 4026, South Africa. dlaminiz@mut.ac.za.
Abstract:
Apoptosis is required for normal heart development in the embryo, but has also been shown to be an important factor in the occurrence of heart disease. Alternative splicing of apoptotic genes is currently emerging as a diagnostic and therapeutic target for heart disease. This review addresses the involvement of abnormalities in alternative splicing of apoptotic genes in cardiac disorders including cardiomyopathy, myocardial ischemia and heart failure. Many pro-apoptotic members of the Bcl-2 family have alternatively spliced isoforms that lack important active domains. These isoforms can play a negative regulatory role by binding to and inhibiting the pro-apoptotic forms. Alternative splicing is observed to be increased in various cardiovascular diseases with the level of alternate transcripts increasing elevated in diseased hearts compared to healthy subjects. In many cases these isoforms appear to be the underlying cause of the disease, while in others they may be induced in response to cardiovascular pathologies. Regardless of this, the detection of alternate splicing events in the heart can serve as useful diagnostic or prognostic tools, while those splicing events that seem to play a causative role in cardiovascular disease make attractive future drug targets.
Insights
Alternative splicing of apoptotic genes is crucial in heart disease development and progression. Aberrant splicing offers potential diagnostic markers and therapeutic targets for cardiovascular disorders.
Area of Science:
- Molecular Biology
- Cardiovascular Science
- Genetics
Background:
- Apoptosis is vital for heart development and implicated in heart disease.
- Alternative splicing of apoptotic genes is an emerging area for cardiac disease research.
Purpose of the Study:
- To review the role of aberrant alternative splicing of apoptotic genes in cardiac disorders.
- To highlight the diagnostic and therapeutic potential of alternative splicing in heart disease.
Main Methods:
- Literature review focusing on alternative splicing in apoptosis and cardiovascular diseases.
- Analysis of Bcl-2 family alternative splicing and its functional implications.
- Examination of altered transcript levels in diseased versus healthy hearts.
Main Results:
- Alternative splicing of apoptotic genes, particularly Bcl-2 family members, is increased in cardiovascular diseases.
- Alternatively spliced isoforms can inhibit pro-apoptotic functions, contributing to disease pathology.
- Elevated alternate transcripts serve as potential diagnostic and prognostic indicators.
Conclusions:
- Abnormal alternative splicing of apoptotic genes is implicated in cardiomyopathy, ischemia, and heart failure.
- These splicing events can be causative or adaptive responses to cardiac pathology.
- Targeting disease-related splicing events presents a promising therapeutic strategy for heart disease.
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