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A review of known imprinting syndromes and their association with assisted reproduction technologies Amor DJ; Halliday JHum Reprod 2008[Dec]; 23 (12): 2826-34An association between assisted reproduction technologies (ART) and abnormal genomic imprinting in humans has been recognized for several years; however, the magnitude of this risk and the spectrum of imprinting syndromes to which the risk applies remains unknown. Nine human imprinting syndromes have been identified but current evidence links ART with only three: Beckwith-Wiedemann syndrome, Angelman syndrome and the newly described maternal hypomethylation syndrome. There is currently a lack of evidence linking ART with the remaining six imprinting syndromes: Prader-Willi syndrome, Russell-Silver syndrome, maternal and paternal uniparental disomy of chromosome 14, pseudohypoparathyroidism type 1b and transient neonatal diabetes. Evidence from clinical reports suggests that the association between imprinting syndromes and ART may be restricted to syndromes where the imprinting change takes the form of hypomethylation on the maternal allele. In contrast, studies of gametes and early embryos suggest that ART can be associated with hypermethylation as well as hypomethylation, with imprinting changes occurring on paternal as well as maternal alleles. The health effects of ART-associated imprinting changes may also extend beyond the nine recognized imprinting syndromes.|*Epigenesis, Genetic[MESH]|*Genomic Imprinting[MESH]|Angelman Syndrome/genetics[MESH]|Beckwith-Wiedemann Syndrome/genetics[MESH]|Chromosomes, Human, Pair 14[MESH]|Craniofacial Abnormalities/genetics[MESH]|DNA Methylation[MESH]|Diabetes Mellitus/genetics[MESH]|Female[MESH]|Humans[MESH]|Prader-Willi Syndrome/genetics[MESH]|Pregnancy[MESH]|Pseudohypoparathyroidism/genetics[MESH]|Reproductive Techniques, Assisted/*adverse effects[MESH]|Syndrome[MESH]|Uniparental Disomy[MESH] |
