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Transmission of Angelman syndrome by an affected mother


Purpose: To determine: 1) If a 15q11–13 deletion was transmitted from a female with Angelman syndrome to her fetus, and 2) If the UBE3A gene was functionally imprinted in fetal eye.

Methods: Individuals were genotyped by microsatellite analysis. DNA methylation imprints were assessed by Southern blot analysis and methylationspecific PCR. Expression was analyzed by RT-PCR.

Results: The mother and fetus inherited large deletions of maternal 15q11–13 and demonstrated paternal-only DNA methylation imprints along 15q11–13. UBE3A was paternally expressed in eye tissue from the fetus with Angelman syndrome.

Conclusions: We show that females with Angelman syndrome are fully capable of reproduction and that UBE3A is not imprinted in fetal eye.

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Lossie, A., Driscoll, D. Transmission of Angelman syndrome by an affected mother. Genet Med 1, 262–266 (1999).

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  • Angelman syndrome
  • genomic imprinting
  • 15q11
  • 13 deletion
  • reproduction
  • DNA methylation


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