ISSN 1662-4009 (online)

ey0016.2-6 | Neonatal Diabetes Mellitus | ESPEYB16

2.6. Trisomy 21 is a cause of permanent neonatal diabetes that is autoimmune but not HLA associated

MB Johnson , E De Franco , W Atma , S Greeley , LR Letourneau , K Gillespie , International DS-PNDM consortium , MN Wakeling , S Ellard , SE Flanagan , KA Patel , AT Hattersley

To read the full abstract: Diabetes. 2019 Apr 8. pii: db190045. doi: 10.2337/db19-0045.This study assessed the incidence of permanent neonatal diabetes mellitus (PNDM) in patients with Trisomy 21.Patients with Trisomy 21 have an increased prevalence of autoimmune conditions, such as Type 1 diabetes, celiac disease, alopecia, vitiligo and autoimmune thyroid disorder...

ey0018.10-13 | (1) | ESPEYB18

10.13. Type 1 diabetes can present before the age of 6 months and is characterized by autoimmunity and rapid loss of beta cells

MB Johnson , KA Patel , E De Franco , W Hagopian , M Killian , TJ McDonald , TIM Tree , C Domingo-Vila , M Hudson , S Hammersley , R; EXE-T1D Consortium Dobbs , S Ellard , SE Flanagan , AT Hattersley , RA Oram

Diabetologia. 2020;63(12):2605–2615. doi: 10.1007/s00125-020-05276-4.Diabetes diagnosed at <6 months of age is often of monogenic origin. However, 10-15% of affected infants do not have a pathogenic variant in one of the 26 known neonatal diabetes genes. In this study, 166 infants diagnosed at <6 months of age without such pathogenic variants showed all the the classic feat...

ey0017.2-7 | Neonatal Diabetes Mellitus | ESPEYB17

2.7. De novo mutations in EIF2B1 affecting eif2 signaling cause neonatal/early-onset diabetes and transient hepatic dysfunction

E De Franco , R Caswell , MB Johnson , MN Wakeling , A Zung , VC Dung , CT Bich Ngoc , R Goonetilleke , M Vivanco Jury , M El-Khateeb , S Ellard , SE Flanagan , D Ron , AT Hattersley

To read the full abstract: Diabetes. 2020 Mar;69(3):477–483. doi: 10.2337/db19-1029. Epub 2019 Dec 27. PMID: 31882561Endoplasmic recticulum (ER) stress plays an important role in the etiology of several forms of diabetes mellitus. There is evidence that ER stress plays a role in both type 1 and type 2 diabetes. More importantly molecular defects in the ER stress pathway are linked to monoge...

ey0015.2-12 | Neonatal diabetes with autoimmunity can be associated with LRBA Mutations | ESPEYB15

Neonatal diabetes with autoimmunity can be associated with LRBA Mutations

MB Johnson , E De Franco , H Lango Allen , A Al Senani , N Elbarbary , Z Siklar , M Berberoglu , Z Imane , A Haghighi , Z Razavi , I Ullah , Alyaarubi , D Gardner , S Ellard , AT Hattersley , SE Flanagan

To read the full abstract: Diabetes 2017 Aug;66(8):2316-2322Biallelic mutations in the human lipopolysaccharide responsive beige-like anchor (LRBA) gene lead to a primary immunodeficiency known as LRBA deficiency, characterized early-onset hypogammaglobulinemia, severe autoimmune manifestations, enteropathy, lymphoproliferation, and recurrent respiratory tract infections. Neonatal diabetes mellitus (...

ey0020.13-8 | Section | ESPEYB20

13.8. Non-coding variants disrupting a tissue-specific regulatory element in HK1 cause congenital hyperinsulinism

MN Wakeling , NDL Owens , JR Hopkinson , MB Johnson , JAL Houghton , A Dastamani , CS Flaxman , RC Wyatt , TI Hewat , JJ Hopkins , TW Laver , R van Heugten , MN Weedon , E De Franco , KA Patel , S Ellard , NG Morgan , E Cheesman , I Banerjee , AT Hattersley , MJ Dunne , International Congenital Hyperinsulinism Consortium , SJ Richardson , SE Flanagan

In Brief: The authors performed whole genome sequencing on 135 patients with congenital hyperinsulinaemia (CHI) who had negative genetic testing for previously known CHI genes. They identified nine different non-coding de novo variants (carried by 14 probands) located in a regulatory region of HK1 intron 2 that co-segregated with disease in families.Comment: HK1 is a ‘disallowed gene’ in the liver and pancreatic beta cells. Th...

ey0018.2-11 | Neonatal diabetes mellitus | ESPEYB18

2.11. YIPF5 mutations cause neonatal diabetes and microcephaly through endoplasmic reticulum stress

E De Franco , M Lytrivi , H Ibrahim , H Montaser , MN Wakeling , F Fantuzzi , K Patel , C Demarez , Y Cai , M Igoillo-Esteve , C Cosentino , V Lithovius , H Vihinen , E Jokitalo , TW Laver , MB Johnson , T Sawatani , H Shakeri , N Pachera , B Haliloglu , MN Ozbek , E Unal , R Yıldırım , T Godbole , M Yildiz , B Aydin , A Bilheu , I Suzuki , SE Flanagan , P Vanderhaeghen , V Senee , C Julier , P Marchetti , DL Eizirik , S Ellard , J Saarimaki-Vire , T Otonkoski , M Cnop , AT Hattersley

J Clin Invest. 2020 Dec 1;130(12):6338–6353. doi: 10.1172/JCI141455. PMID: 33164986.This manuscript describes a novel disorder due to homozygous mutations in the YIPF5 gene which cause a complex syndrome of neonatal/early onset diabetes mellitus, epilepsy and microcephaly. The underlying mechanism of the diabetes involves the accumulation of proinsulin (unable to be transported to the Golgi...