hrp0092p1-140 | Sex Differentiation, Gonads and Gynaecology or Sex Endocrinology | ESPE2019

Methylation Status of X Inactivation-Escape Genes in Controls and Females with X Chromosome Rearrangements

Kawashima Sayaka , Matsubara Keiko , Toki Machiko , Kosaki Rika , Hasegawa Yukihiro , Fukami Maki , Kagami Masayo

Context: X chromosome inactivation (XCI) is a process in which one of the two X chromosomes in a female is randomly inactivated in order to correct gene dosage between males and females. However, about 15% of genes escape from XCI (termed escapees), and 10% of genes are variably inactivated (variable genes). The mechanism of inactivation and escape remains to be revealed. The promoter regions of escapees are hypomethylated compared to those of the inac...

hrp0089p2-p272 | Growth & Syndromes P2 | ESPE2018

Mild Autistic Spectrum Disorder in a 33 Year-old Male Japanese Patient with Temple Syndrome

Yatsuga Shuichi , Kagami Masayo , Matsubara Keiko , Kimura Takuro , Yatsuga Chiho , Mukasa Rio , Matsumoto Takako , Koga Yasutoshi

Introduction: Temple syndrome (TS14) caused by maternal uniparental disomy chromosome 14 (UPD(14)mat), paternal deletions and the imprinting defect affecting the 14q32.2 imprinted region is associated with non-specific symptoms such as growth failure, precocious puberty, obesity, and diabetes mellitus (DM). Some TS14 cases are misdiagnosed as having Prader–Willi syndrome (PWS). In TS14, patient’s intelligence quotient (IQ) is usually normal, and autism spectrum disor...

hrp0089rfc15.2 | Growth and syndromes | ESPE2018

Molecular and Clinical Analyses of Two UPD(16)mat Patients Detected by Screening of 94 Silver-Russell Syndrome Patients without Known Etiology

Inoue Takanobu , Yagasaki Hideaki , Nishioka Junko , Nakamura Akie , Matsubara Keiko , Narumi Satoshi , Nakabayashi Kazuhiko , Yamazawa Kazuki , Fuke Tomoko , Oka Akira , Ogata Tsutomu , Fukami Maki , Kagami Masayo

Background: Maternal uniparental disomy of chromosome 16 (UPD(16)mat) is defined as the presence of two homologous chromosomes 16 inherited from only the mother. To our knowledge, 49 live-born UPD(16)mat patients without chromosomal abnormalities other than that in chromosome 16 have been reported. UPD(16)mat patients presented with non-specific clinical features such as preterm birth, growth retardation, congenital heart diseases (CHDs) and hypospadias. Silver-Russell syndrom...

hrp0084p1-95 | Growth | ESPE2015

Various Imprinting Disorders Underlying Silver-Russell Syndrome-Compatible Phenotype

Kagami Masayo , Matsubara Keiko , Sano Shinichiro , Nakamura Akie , Mizuno Seiji , Hamajima Naoki , Yanagisawa Atsuhiro , Hashimoto Miyuki , Yukote Akira , Fukami Maki , Ogata Tsutomu

Background: Silver-Russell syndrome (SRS) is a rare congenital developmental disorder characterised by pre- and postnatal growth failure, relative macrocephaly, triangular face, hemihypotrophy, and fifth finger clinodactyly. Hypomethylation of the H19-DMR and maternal uniparental disomy chromosome 7 (UPD(7)mat) were identified in about 30 and 10% of SRS patients respectively. Genetic causes of the remaining 60% of the patients are unknown. Growth failure, small hands, and hypo...

hrp0089p1-p186 | Growth & Syndromes P1 | ESPE2018

Maternal Uniparental Disomy for Chromosome 20: Physical and Endocrinological Characteristics of Six Patients

Kawashima Sayaka , Nakamura Akie , Inoue Takanobu , Matsubara Keiko , Horikawa Reiko , Wakui Keiko , Takano Kyoko , Fukushima Yoshimitsu , Tatematsu Toshi , Mizuno Seiji , Tsubaki Junko , Kure Shigeo , Matsubara Yoichi , Ogata Tsutomu , Nagasaki Keisuke , Fukami Maki , Kagami Masayo

Context: Maternal uniparental disomy for chromosome 20 (UPD(20)mat) resulting in aberrant expression of imprinted transcripts at the GNAS locus is a poorly characterized condition. Only 10 non-mosaic cases have been studied clinically. These patients presented with pre- and post-natal growth failure and feeding difficulties. The phenotype of these cases overlapped with that of Silver-Russell syndrome (SRS) and small for gestational age-short stature (SGA-SS); however, the etio...