hrp0095p1-333 | Multisystem Endocrine Disorders | ESPE2022

Emerging phenotypes linked to variants in SAMD9 and MIRAGE syndrome

P. Suntharalingham Jenifer , Ishida Miho , E. Stalman Susanne , Solanky Nita , E. Moore Gudrun , C. Achermann John , Buonocore Federica

Background: Heterozygous de novo variants in SAMD9 cause the complex multisystem growth disorder, MIRAGE syndrome. Core features are myelodysplasia, infection, restricted growth, adrenal hypoplasia, genital/gonadal phenotypes, and enteropathy. However, the range of additional associations is expanding and includes disrupted placental development, poor post-natal growth, and other endocrine features. Milder phenotypes are also described, such ...

hrp0094p2-238 | Fetal, neonatal endocrinology and metabolism (to include hypoglycaemia) | ESPE2021

Analysis of Placental Steroidogenesis as a Cause of Recurrent Miscarriage

Suntharalingham Jenifer , Ishida Miho , Buonocore Federica , Valle Ignacio del , Solanky Nita , Demetriou Charalambos , Peskett Emma , Regan Lesley , Moore Gudrun , Achermann John ,

Background: Recurrent miscarriage (RM) is traditionally described as three or more consecutive pregnancy losses and remains a challenging condition, affecting 1-3% of couples trying to conceive. Although factors such as uterine abnormalities, maternal hypothyroidism and parental balanced translocations are associated with RM, in most situations the aetiology is unknown. The coexistence of RM and live births in many families suggests a potential association wit...

hrp0095p1-371 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2022

Exome sequencing reveals a high proportion of causal and candidate gene variants in a large early-onset Primary Ovarian Insufficiency cohort

M McGlacken-Byrne Sinead , P Suntharalingham Jenifer , Ishida Miho , Buonocore Federica , Del Valle Ignacio , Cameron-Pimblett Antoinette , Genomics UCL , T Dattani Mehul , S Conway Gerard , C Achermann John

Background: The presentation of early-onset Primary Ovarian Insufficiency (EO-POI), most often with primary amenorrhea, is at one end of a spectrum spanning 40 years. The aetiology of POI is frequently unclear but next generation sequencing of varied age groups has identified several associated genetic variants. Whether girls with EO-POI are more likely to have a genetic aetiology than those with later presentations remains unknown.<stro...

hrp0089rfc10.1 | Late Breaking | ESPE2018

Patients with GH Insensitivity and IGF-1 Resistance Harbour Copy Number Variants Causing a Silver-Russell-Like Phenotype

Cottrell Emily , Chatterjee Sumana , Moore Gudrun , Ishida Miho , Greening James , Wright Neil , Bossowski Artur , Deeb Asma , Al Basiri Iman , Rose Steven , Mason Avril , Ahn Joowook , Bint Susan , Savage Martin , Metherell Louise A , Storr Helen L

Introduction: Our Centre is an international referral centre for genetic analysis of children with short stature (SS) and features of GH/IGF-1 resistance. Following candidate gene and whole exome sequencing, diagnoses for ~50% patients remained elusive. Copy number variation (CNV) has not previously been investigated in GH/IGF-1 resistance and we hypothesised that CNVs contribute to the phenotype in our undiagnosed cohort.Experimental Design and Methodol...

hrp0095p1-322 | Growth and Syndromes | ESPE2022

Analysis of genetic variability in 134 women with Turner Syndrome using high-throughput next-generation sequencing

P. Suntharalingham Jenifer , Ishida Miho , Cameron-Pimblett Antoinette , M. McGlacken-Byrne Sinead , Del Valle Ignacio , Buonocore Federica , Brooks Anthony , Kaur Madhan Gaganjit , Genomics Sequencing Facility UCL , S. Conway Gerard , C. Achermann John

Background: Turner syndrome (TS) affects 1:2,500 females and results from complete or partial loss of one of the X chromosomes. Typical traits associated with TS include short stature, primary ovarian insufficiency (POI), autoimmune diseases, and cardiovascular and endocrine disorders. Long-term follow-up is needed from the time of presentation into adult life. Several genetic mechanisms have been proposed to account for the development of TS-associated featur...

hrp0094p1-50 | Sex Endocrinology and Gonads A | ESPE2021

Pathogenic variants in the human m6A reader YTHDC2 are associated with primary ovarian insufficiency

McGlacken-Byrne Sinead M , Torres Ignacio Del Valle , Stabej Polona Le Quesne , Belutti Laura , Ocaka Louise , Ishida Miho , Suntharalingham Jenifer P , Genomics UCL , Discovery GOSgene , Resource Human Developmental Biology , Dattani Mehul T , Kelberman Dan , Lagos Carlos F , Livera Gabriel , Conway Gerard S , Achermann John C ,

Background: Primary ovarian insufficiency (POI) is genetically mediated in up to 30% of cases. Many genes associated with POI have roles in early ovary developmental processes, including meiosis.Objectives: We investigated the genetic mechanism underlying early-onset POI in three young women presenting with absent puberty: two sisters from a consanguineous pedigree and a third unrelated proband.<st...