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.

Author: Mohn Faegis
Country: Finland
Language: English (Spanish)
Genre: Career
Published (Last): 27 August 2009
Pages: 500
PDF File Size: 1.81 Mb
ePub File Size: 3.65 Mb
ISBN: 128-1-89448-486-2
Downloads: 4685
Price: Free* [*Free Regsitration Required]
Uploader: Vosida

Multiple sulfatase deficiency Hyperproinsulinemia Ehlers—Danlos syndrome 6. Diagnosis, Treatment, and Research, 3 ed. Females with a premutation of the FMR1 gene are at risk to have children with fragile X syndrome because the number of CGG repeats can increase when the gene is passed into the next generation.

The Cochrane Database of Systematic Reviews 5: Affected Populations The fragile X syndrome affects about 1 in 4, males and 1 in 6, to 8, females in the USA; that is, it affects about twice as many males as it does females. frzjil

Fragile X syndrome – Wikipedia

Frajul, there are many researchers who are actively working on treatments for fragile X syndrome. Insights from model systems”. Archived from the original on There is no cure for Fragile X — frajiil. Investigational Therapies The development of animal models for fragile X syndrome studies over the last two decades resulted in great anticipation that effective drug treatments could be discovered. In speech, the trend is not only in repeating the same phrase but also talking about the same subject continually.

Rare Disease Database

For You Women Frrajil Handouts. Supportive careearly interventions [2]. You can treat some symptoms with educational, behavioral, or physical therapy, and with medicines.


Females with FXS frequently display shyness, social anxiety and social avoidance or withdrawal. Social Cognitive and Affective Neuroscience. A Love Story Rules.

The syndrome has been mapped to gene map locus Xp Chromosome abnormalities Q90—Q99 Comparisons may be useful for a differential diagnosis: The Journal of Neuroscience. However, monitoring is required for metabolic side effects including weight gain and diabetes, as well as movement disorders related to extrapyramidal side effects such as tardive dyskinesia. Although an affected male may appear physically normal, his head circumference and height will be at the lower limits of normal.

Together we are strong.

Ultra-rare patients with fragile X syndrome have been found to have a mutation in a single DNA base called point mutations resulting in absent or defective FMRP. These might include Intelligence problems, ranging from learning disabilities to severe intellectual disabilities Social and emotional problems, such as aggression in boys or shyness in girls Speech and language problems, especially in boys A genetic blood test can diagnose Fragile X.

This page was last edited on 9 Decemberat New situations may cause a child with Fragile X syndrome to become severely anxious or afraid. The X chromosome is one of two sex determining chromosomes.

However, their children are at increased risk because the premutation may be unstable when transmitted to the next generation. Most parents notice delays in speech and language skills, difficulties in social and emotional domains as well as sensitivity levels xx certain situations with their children.

Centers for Disease Control and Prevention.

Wikimedia Commons has media related to Fragile X syndrome. Women with POI can still c pregnant in some cases because their ovaries may function irregularly to release viable eggs where frwjil women who have completed menopause can not fall pregnant because their ovaries no longer release eggs.

  GMW 3103 PDF

Transitions from one location to another can be difficult for children with FXS. These include special education, speech, occupational, and sensory integration training, and behavior modification programs. Current pharmacological treatment centers on managing problem behaviors and psychiatric symptoms associated with FXS.

Watch the digital animation below for a pictorial view of how the genetics of Fragile X work. Males have one X and one Y chromosome and females have two X chromosomes. Some girls have no signs at all. If they inherit the affected gene they will either be a carrier or have full mutation Fragile X.

FXS is characterized by social anxietyincluding poor eye contact, gaze aversion, prolonged time to commence social interaction, and challenges forming peer relationships. Diagnosis of FXTAS can be complicated by its similarity to other late adult onset disorders such as Parkinson disease.

What causes Fragile X Syndrome | Fragile X Association of Australia

Fragile X syndrome is characterized by moderate intellectual disability in affected males and mild intellectual disability in affected females. Prenatal testing with chorionic villus sampling or amniocentesis allows diagnosis of FMR1 mutation while the fetus is in utero and appears to be reliable.

Repeat expansion is considered to be a consequence of strand slippage either during DNA replication or DNA frajkl synthesis.