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What does TRED mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: TRED.

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TRED

Tolerance Reassessment Decision

Medical » Physiology

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Transcriptional Regulatory Element Database

Governmental » US Government

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Taxonomic Resources and Expertise Directory

Academic & Science » Botany

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Temporary Renewable Energy Development

Community » Development

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Translational Research and Economic Development

Community » Development -- and more...

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Transportation Reaching Every Direction

Governmental » Transportation

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T rubrum Expression Database

Computing » Databases

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Tal Recovery Extraction Device

Miscellaneous » Unclassified

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TRED

Tasmania Recovery from Eating Disorders

Miscellaneous » Unclassified

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Thyroid Related Eye Disease

Medical » Diseases

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Total Recovery and Extraction Device

Miscellaneous » Automotive

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What does TRED mean?

TRED
Trinucleotide repeat disorders, also known as microsatellite expansion diseases, are a set of over 50 genetic disorders caused by trinucleotide repeat expansion, a kind of mutation in which repeats of three nucleotides (trinucleotide repeats) increase in copy numbers until they cross a threshold above which they become unstable. Depending on its location, the unstable trinucleotide repeat may cause defects in a protein encoded by a gene; change the regulation of gene expression; produce a toxic RNA, or lead to chromosome instability. In general, the larger the expansion the faster the onset of disease, and the more severe the disease becomes.Trinucleotide repeats are a subset of a larger class of unstable microsatellite repeats that occur throughout all genomes. The first trinucleotide repeat disease to be identified was fragile X syndrome, which has since been mapped to the long arm of the X chromosome. Patients carry from 230 to 4000 CGG repeats in the gene that causes fragile X syndrome, while unaffected individuals have up to 50 repeats and carriers of the disease have 60 to 230 repeats. The chromosomal instability resulting from this trinucleotide expansion presents clinically as intellectual disability, distinctive facial features, and macroorchidism in males. The second DNA-triplet repeat disease, fragile X-E syndrome, was also identified on the X chromosome, but was found to be the result of an expanded CCG repeat. The discovery that trinucleotide repeats could expand during intergenerational transmission and could cause disease was the first evidence that not all disease-causing mutations are stably transmitted from parent to offspring.There are several known categories of trinucleotide repeat disorder. Category I includes Huntington's disease (HD) and the spinocerebellar ataxias. These are caused by a CAG repeat expansion in protein-coding portions, or exons, of specific genes. Category II expansions are also found in exons, and tend to be more phenotypically diverse with heterogeneous expansions that are generally small in magnitude. Category III includes fragile X syndrome, myotonic dystrophy, two of the spinocerebellar ataxias, juvenile myoclonic epilepsy, and Friedreich's ataxia. These diseases are characterized by typically much larger repeat expansions than the first two groups, and the repeats are located in introns rather than exons.

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