منابع مشابه
[Non-specific X-linked mental retardation].
INTRODUCTION Non-specific mental retardation is defined by the absence of somatic, neurological, biochemical or behavioural features that characterise a particular clinical variant and accounts for a large percentage of cases of X-linked mental retardation (XLMR). Genetic linkage studies showed it to have a high rate of genetic heterogeneity. DEVELOPMENT To date, genetic linkage studies or th...
متن کاملX-linked mental retardation.
A survey of the mentally retarded children with an IQ between 30 and 55 born in a 10-year period (1955-64) and now of school age was carried out in New South Wales. The number of propositi who had a similarly affected sib of the same sex was ascertained; 58 boys had a similarly affected brother(s) and 22 girls had a similarly affected sister(s). It is suggested that the excess of affected broth...
متن کاملNon-specific X-linked semidominant mental retardation by mutations in a Rab GDP-dissociation inhibitor.
Non-specific X-linked mental retardation (MRX) is a very common disorder which affects approximately 1 in 600 males. Despite this high frequency, little is known about the molecular defects underlying this disorder, mainly because of the clinical and genetic heterogeneity which is evident from linkage studies. Recently, a collaborative study using the candidate gene approach demonstrated the pr...
متن کاملX-linked mental retardation and epigenetics
The search for the genetic defects in constitutional diseases has so far been restricted to direct methods for the identification of genetic mutations in the patients' genome. Traditional methods such as karyotyping, FISH, mutation screening, positional cloning and CGH, have been complemented with newer methods including array-CGH and PCR-based approaches (MLPA, qPCR). These methods have reveal...
متن کاملAlpha thalassaemia-mental retardation, X linked
X-linked alpha thalassaemia mental retardation (ATR-X) syndrome in males is associated with profound developmental delay, facial dysmorphism, genital abnormalities and alpha thalassaemia. Female carriers are usually physically and intellectually normal. So far, 168 patients have been reported. Language is usually very limited. Seizures occur in about one third of the cases. While many patients ...
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ژورنال
عنوان ژورنال: Journal of Medical Genetics
سال: 1991
ISSN: 1468-6244
DOI: 10.1136/jmg.28.6.378