Fragile X, the most common cause of inherited intellectual disability, is caused by the mutation of a single gene, called FMR1, on the X chromosome. The gene, which is supposed to make a protein needed for typical brain development, is turned partially or totally off. Boys usually have some degree of intellectual disability. Girls with the condition may have intellectual disability or normal intelligence.
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Fragile X, the most common cause of inherited intellectual disability, is caused by the mutation of a single gene, called FMR1, on the X chromosome.
The gene, which is supposed to make a protein needed for typical brain development, is turned partially or totally off. Boys usually have some degree of intellectual disability. Girls with the condition may have intellectual disability or normal intelligence. In clinical terms, the connection means that those with autism can be screened for fragile X with a blood test. Finding out fragile X is playing a role is important to families because the condition is genetic, and can affect other members of the family.
For example, the sibling of a child with fragile X, who has been having more mild difficulties, may also be affected by fragile X, though to a different degree. Other relatives, who may be carriers of the condition even if they do not have it themselves, will be able to benefit from genetic counseling when it comes time to make decisions about having children. In terms of science, it is hoped that the overlap between fragile X and autism may point the way to answers.
A diagnosis of autism is currently made based entirely on behavior. There is no known cause, and no known biological marker of the condition. In contrast, a diagnosis of fragile X is made entirely based upon genetics, and the multiple influences of this one mutation on structure and processing in the brain are at least partially understood. It is hoped that, by using fragile X as a starting point, progress may be made in solving the mysteries surrounding autism.
That information could shed light on the development and treatment of both conditions. One study found that the boys with FXS has significantly less trouble with social smiling, but more trouble with complex mannerisms, than similar boys who do not have FXS.
Fragile X Syndrome and Autism
Shaktishicage Pediatr Infect Dis J. This circumstance would not allow establishing a universal cutoff and would necessitate using controls in each run to detect shifts in temperature cutoffs. This method ascertains whether the temperature at which the first derivative melting curve returns to baseline is above or below a cutoff to distinguish premutations and full mutations from normal alleles. Aberrant face and gaze habituation in fragile X syndrome.
Fragile X syndrome
Standards for selected anthropometric measurements in males with the fragile X syndrome. The relationship between gastroesophageal reflux and apnea in infants. Fragile X syndrome General recommendations should be provided and medication management, such as, thickening agents, antacids, histamine-2 H-2 blockers and proton-pump inhibitors, should be prescribed if necessary. Characteristics and comorbid diagnoses. Signs of slight redness, mobility impairments and abnormal positioning of tympanic membrane TM such as retraction or bulging, should be carefully assessed. Prenatal testing with chorionic villus sampling or amniocentesis allows diagnosis of FMR1 mutation while the fetus is in utero and appears to be reliable.
FRAJIL X SENDROMU PDF