Síndrome de X Frágil

Translated title of the contribution: Fragile X Syndrome

Wilmar Saldarriaga, Flora Tassone, Laura Yuriko González-Teshima, Jose Vicente Forero-Forero, Sebastián Ayala-Zapata, Randi J Hagerman

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


Fragile X Syndrome (FXS) is a genetic disease due to a CGG trinucleotide expansion, named full mutation (greater than 200 CGG repeats), in the FMR1 gene locus Xq27.3; which leads to an hypermethylated region in the gene promoter therefore silencing it and lowering the expression levels of FMRP, a protein involved in synaptic plasticity and maturation. Individuals with FXS present with intellectual disability, autism, hyperactivity, long face, large or prominent ears and macroorchidism at puberty and thereafter. Most of the young children with FXS will present with language delay, sensory hyper arousal and anxiety. Girls are less affected than boys, only 25% have intellectual disability. Given the genomic features of the syndrome, there are patients with a number of triplet repeats between 55 and 200, known as premutation (PM) carriers. Most carriers have a normal IQ but some have developmental problems. The diagnosis of FXS has evolved from karyotype with special culture medium, to molecular techniques that are more sensitive and specific including PCR and Southern Blot. During the last decade, the advances in the knowledge of FXS, has led to the development of investigations on pharmaceutical management or targeted treatments for FXS. Minocycline and sertraline have shown efficacy in children.

Translated title of the contributionFragile X Syndrome
Original languageSpanish
Pages (from-to)190-198
Number of pages9
JournalColombia Medica
Issue number4
StatePublished - 2014


  • Fragile X Mental Retardation Protein
  • Fragile X Syndrome
  • Genetic counselling
  • Intellectual disability
  • Review
  • Therapeutics

ASJC Scopus subject areas

  • Medicine(all)


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