Las mutaciones inestables, nuevo reto para el consejo genético de enfermedades hereditarias: [revisión] / Unstable mutations, new challenges for genetic counseling of inherited disorders: [review]
Rev. biol. trop
;
52(3): 491-499, sept. 2004. tab
Article
in Spanish
| LILACS
| ID: lil-501732
ABSTRACT
Unstable mutations or amplification of DNA tandem repeats sequences constitute a new kind of genetic alteration discovered in the 90's that cause hereditary diseases. This mutation has been found inside or near important genes involved in the normal neurological function in human beings. In some cases, the presence of the amplification causes altered expression of the genes, their inactivation or the synthesis of a protein with new functions. Some common characteristics of these diseases are that they affect the central nervous system and are degenerative in nature. Most of them show genetic anticipation meaning that the severity of the manifestations increases in each generation and appear at an earlier age. In most cases, the severity of the symptoms is positively correlated with the size of the amplification. Twenty illnesses caused by this kind of mutations have been identified so far. Briefly, this work reviews the current knowledge about this topic.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Repetitive Sequences, Nucleic Acid
/
Heredodegenerative Disorders, Nervous System
/
Genetic Counseling
/
Mutation
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Humans
Language:
Spanish
Journal:
Rev. biol. trop
Journal subject:
Biology
/
Tropical Medicine
Year:
2004
Type:
Article
Affiliation country:
Costa Rica
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