Variant Profile of MECP2 Gene in Sri Lankan Patients with Rett Syndrome.
This paper is a gene list, not a therapy study—use it to confirm Rett syndrome faster in South-Asian girls.
01Research in Context
What this study did
Doctors in Sri Lanka looked at the MECP2 gene in 16 girls who already had Rett syndrome.
They wrote down every DNA change they found.
No therapy was given and no behavior scores were taken.
What they found
The team listed the exact MECP2 mutations in each child.
The list adds new variants to the world database for Rett syndrome.
How this fits with other research
Hamama et al. (2021) did the same kind of gene list for MED13L syndrome.
Both papers simply catalog new mutations; neither tests an intervention.
Kanduri et al. (2016) also mapped rare DNA changes, but in Finnish autism families with large copy-number variants instead of single-gene mutations.
The three studies together show that every region finds its own pattern of rare DNA changes.
Why it matters
If you work with a girl who has Rett traits but no gene report, ask the family if testing was done.
Finding an MECP2 change confirms the diagnosis and tells you to expect classic Rett behaviors—hand-wringing, breath-holding, and loss of speech.
Share the Sri Lanka list with the medical team; it may speed up gene reading for future South-Asian clients.
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02At a glance
03Original abstract
Rett syndrome (RTT) is a rare monogenic disorder affecting 1 in 10,000 live female births causing severe neurodegenerative symptoms. We analyzed the molecular genetic variants in the gene encoding the methyl-CpG binding protein 2 (MECP2) of 16 girls with RTT. Their mutation profile was as follows; Already described variants: p.R168X in 25% (n = 4), p.T158M in 25% (n = 4), p.R255X in 12.5% (n = 2), p.R133C in 12.5% (n = 2), p.R294X in 6.25% (n = 1), p.K177X in 6.25% (n = 1). Novel variants: a large deletion (c.868_1188del321) in 6.25% (n = 1) and a p.X499L in 6.25% (n = 1). We also looked at the genotype to phenotype correlation of these variants. Most of the mutations were C>T in CpG hot spot as seen in other populations.
Journal of autism and developmental disorders, 2020 · doi:10.1007/s10803-019-04230-7