Fragile X syndrome, also termed Martin-Bell syndrome or marker X syndrome, is the most common cause of inherited mental retardation. Fragile X syndrome has been found in all major ethnic groups and races, and is caused by an abnormality (mutation) in the FMR1 gene. FMR1 is a gene located . Fragile X syndrome is caused by the expansion or lengthening of the FMR1 gene on the X chromosome, known as a gene mutation. The X chromosome is one.

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Expanded CGG-repeat alleles of the fragile X gene”. Archived PDF from the original on Some symptoms of the following disorders can be similar to those of fragile X syndrome. Motor and language delays are usually present but become more apparent over time.

See, Play and Learn No links available. Therapies Psychotropic medication antipsychotics Aripiprazole Risperidone.

Most of these mRNA targets have been found to be located in the dendrites of neurons, and brain tissue from humans with FXS and mouse models shows abnormal dendritic spineswhich are required to increase contact with other neurons.

What causes Fragile X Syndrome

Protein folding Alzheimer’s disease Frajio disease Creutzfeldt—Jakob disease chaperonins: However, their children are at increased risk because the premutation may be unstable when transmitted to the next generation.

Prenatal testing with chorionic villus sampling or amniocentesis allows diagnosis of FMR1 mutation while the fetus is in utero and appears to be reliable.

Social withdrawal behaviors, including avoidance and indifference, appear to be the best predictors of ASD in FXS, with avoidance appearing to be correlated more with social anxiety while indifference was more strongly correlated to severe ASD. Journal of Neurodevelopmental Disorders. Meet our Kids — Fragile X Portraits. Sons born to male carriers will not inherit their fathers X chromosome and therefore will not be affected by Fragile X.


Lessons learned from the most translated neurodevelopmental disorder in clinical trials”. Behavioral abnormalities including autistic behaviors are common. Handbook of neurodevelopmental and genetic disorders in children. European Journal of Human Genetics. People with only a small change in the gene might not show any signs of Fragile X.

X-linked spinal muscular atrophy 2 E3: For information about clinical trials sponsored by private sources, contact: Self-talk includes talking with oneself using different tones and pitches. The Merck Manual-Home Edition.

Current pharmacological treatment centers on managing problem behaviors and psychiatric symptoms associated with FXS.

Fragile X syndrome FXS is a genetic disorder. Chromosome abnormalities Q90—Q99 Who should be tested for Fragile X? However, there are many researchers who are actively working on treatments for fragile X syndrome. Fragile X Syndrome Also called: FMRP is involved in making connections between neurons nerve cells in the brain. Perseveration is a common communicative and behavioral characteristic in FXS. But the problem causes a person to make little or none of the protein. Normally, the X chromosome contains between 6 and 50 repeats of frajl gene the FMR1 gene responsible for producing a protein vital for normal brain development.

Fragile X syndrome is the most common form of inherited developmental disability. These clinics specialize in treatments, therapies, and support for individuals with fragile X syndrome and can guide parents to medication options to address specific frwjil. Current trends in treating the disorder include medications for symptom-based treatments that aim to minimize the secondary characteristics associated with the disorder.

Other symptoms can include flat feet, frequent ear infections, low muscle tone, a long narrow face, high arched palate, dental problems, crossed eyes strabismus and heart problems including mitral valve prolapse. Intellectual disabilitylong and narrow face, large ears, flexible fingers, large testicles [1]. Principles of Medical Genetics.


Wattendorf DJ, Muenke M. Cognitive behavior therapy social skills training Discrete trial training Lovaas Early start denver model Pivotal response treatment Schoolwide positive behavior support. It is common to find these carriers mis-diagnosed as having Parkinsons disease, senile dementia or Alzheimers disease. The fragile X premutation: Diseases of unstable repeat expansion: Some drugs, originally developed to treat other disorders, were shown to be effective in treating symptoms of fragile X syndrome in the frzjil models but fraji used on human subjects appeared to be less effective.

The physical features in affected males are variable and may not be obvious until puberty. Autism rights movement Wrong Planet. There is no cure. Am J Ment Defic. Archived from the original on 12 October The numbered bands specify the location of the thousands of genes that are present on each chromosome.

There may be a short term memory loss, anxiety, decreased sensation to vrajil in the lower extremities and rigidity in movement. Alport syndrome Dent’s disease X-linked nephrogenic diabetes insipidus.

Fragile X Syndrome – NORD (National Organization for Rare Disorders)

Dyskeratosis congenita Hypohidrotic ectodermal dysplasia EDA X-linked ichthyosis X-linked endothelial corneal dystrophy. Fragile X syndrome is characterized by moderate intellectual disability in affected males and mild intellectual disability in affected females. Fragile X syndrome is a rare or orphan disease which affects fraijl in males and 1 in females.

Chromosomes, which are present in the nucleus of human cells, carry the genetic information for each individual.