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monogenic diabetes

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https://www.readbyqxmd.com/read/28754804/fifteen-minute-consultation-monogenic-forms-of-diabetes-with-onset-after-age-6-months
#1
Emma M Dyer, Rakesh Amin
Monogenic forms of diabetes (historically known as Maturity Onset Diabetes of the Young (MODY)) are caused by single gene mutations inherited in an autosomal dominant fashion that result in reduced pancreatic beta cell function. Children with these forms of diabetes may be misdiagnosed as having type 1 or 2 diabetes, which has important implications for treatment, genetic counselling, screening of family members and prognosis. Useful tools now exist to aid in their diagnosis and management. Here, we attempt to outline the clinical features that will help the physician make the differentiation from other diabetes subtypes...
July 28, 2017: Archives of Disease in Childhood. Education and Practice Edition
https://www.readbyqxmd.com/read/28701371/population-based-assessment-of-a-biomarker-based-screening-pathway-to-aid-diagnosis-of-monogenic-diabetes-in-young-onset-patients
#2
Beverley M Shields, Maggie Shepherd, Michelle Hudson, Timothy J McDonald, Kevin Colclough, Jaime Peters, Bridget Knight, Chris Hyde, Sian Ellard, Ewan R Pearson, Andrew T Hattersley
OBJECTIVE: Monogenic diabetes, a young-onset form of diabetes, is often misdiagnosed as type 1 diabetes, resulting in unnecessary treatment with insulin. A screening approach for monogenic diabetes is needed to accurately select suitable patients for expensive diagnostic genetic testing. We used C-peptide and islet autoantibodies, highly sensitive and specific biomarkers for discriminating type 1 from non-type 1 diabetes, in a biomarker screening pathway for monogenic diabetes. RESEARCH DESIGN AND METHODS: We studied patients diagnosed aged 30 years or younger, currently younger than 50 years, in two U...
July 12, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28684784/probing-the-missing-mature-%C3%AE-cell-proteomic-landscape-in-differentiating-patient-ipsc-derived-cells
#3
Heidrun Vethe, Yngvild Bjørlykke, Luiza M Ghila, Joao A Paulo, Hanne Scholz, Steven P Gygi, Simona Chera, Helge Ræder
MODY1 is a maturity-onset monogenic diabetes, caused by heterozygous mutations of the HNF4A gene. To date the cellular and molecular mechanisms leading to disease onset remain largely unknown. In this study, we demonstrate that insulin-positive cells can be generated in vitro from human induced pluripotent stem cells (hiPSCs) derived from patients carrying a non-sense HNF4A mutation, proving for the first time, that a human HNF4A mutation is neither blocking the expression of the insulin genes nor the development of insulin-producing cells in vitro...
July 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28680642/long-lasting-response-to-oral-therapy-in-a-young-male-with-monogenic-diabetes-as-part-of-hnf1b-related-disease
#4
Elena Carrillo, Amparo Lomas, Pedro J Pinés, Cristina Lamas
Mutations in hepatocyte nuclear factor 1β gene (HNF1B) are responsible for a multisystemic syndrome where monogenic diabetes (classically known as MODY 5) and renal anomalies, mostly cysts, are the most characteristic findings. Urogenital malformations, altered liver function tests, hypomagnesemia or hyperuricemia and gout are also part of the syndrome. Diabetes in these patients usually requires early insulinization. We present the case of a young non-obese male patient with a personal history of renal multicystic dysplasia and a debut of diabetes during adolescence with simple hyperglycemia, negative pancreatic autoimmunity and detectable C-peptide levels...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28662344/oral-and-craniofacial-anomalies-of-bardet-biedl-syndrome-dental-management-in-the-context-of-a-rare-disease
#5
A Panny, I Glurich, R M Haws, A Acharya
Standardized guidelines for the oral health management of patients with rare diseases exhibiting morphologic anomalies are currently lacking. This review considers Bardet-Biedl syndrome (BBS), a monogenic autosomal recessive nonmotile ciliopathy, as an archetypal condition. Dental anomalies are present in a majority of individuals affected by BBS due to abnormal embryonic orofacial and tooth development. Genetically encoded intrinsic oral structural anomalies and heterogeneous BBS clinical phenotypes and consequent oral comorbidities confound oral health management...
June 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28654165/using-personalized-medicine-in-the-management-of-diabetes-mellitus
#6
Nina Elk, Otito F Iwuchukwu
Diabetes mellitus is a worldwide problem of immense pharmacoeconomic burden. The multifactorial and complex nature of the disease lends itself to personalized pharmacotherapeutic approaches to treatment. Variability in individual risk and subsequent development of diabetes have been reported, in addition to differences in response to the many oral glucose lowering therapies currently available for diabetes pharmacotherapy. Pharmacogenomic studies have attempted to uncover the heritable components of individual variability in risk susceptibility and response to pharmacotherapy...
June 27, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28640904/correlation-of-disease-severity-with-body-weight-and-high-fat-diet-in-the-fatzo-pco-mouse
#7
Brian A Droz, Bria L Sneed, Charles V Jackson, Karen M Zimmerman, M Dodson Michael, Paul J Emmerson, Tamer Coskun, Richard G Peterson
Obesity in many current pre-clinical animal models of obesity and diabetes is mediated by monogenic mutations; these are rarely associated with the development of human obesity. A new mouse model, the FATZO mouse, has been developed to provide polygenic obesity and a metabolic pattern of hyperglycemia and hyperinsulinemia, that support the presence of insulin resistance similar to metabolic disease in patients with insulin resistance/type 2 diabetes. The FATZO mouse resulted from a cross of C57BL/6J and AKR/J mice followed by selective inbreeding for obesity, increased insulin and hyperglycemia...
2017: PloS One
https://www.readbyqxmd.com/read/28640857/glucose-dysregulation-and-response-to-common-anti-diabetic-agents-in-the-fatzo-pco-mouse
#8
Richard G Peterson, Charles Van Jackson, Karen M Zimmerman, Jorge Alsina-Fernandez, M Dodson Michael, Paul J Emmerson, Tamer Coskun
The FATZO/Pco mouse is the result of a cross of the C57BL/6J and AKR/J strains. The crossing of these two strains and the selective inbreeding for obesity, insulin resistance and hyperglycemia has resulted in an inbred strain exhibiting obesity in the presumed presence of an intact leptin pathway. Routinely used rodent models for obesity and diabetes research have a monogenic defect in leptin signaling that initiates obesity. Given that obesity and its sequelae in humans are polygenic in nature and not associated with leptin signaling defects, the FATZO mouse may represent a more translatable rodent model for study of obesity and its associated metabolic disturbances...
2017: PloS One
https://www.readbyqxmd.com/read/28597946/comprehensive-screening-for-monogenic-diabetes-in-89-japanese-children-with-insulin-requiring-antibody-negative-type-1-diabetes
#9
Kikumi Ushijima, Maki Fukami, Tadayuki Ayabe, Satoshi Narumi, Misako Okuno, Akie Nakamura, Toshikazu Takahashi, Kenji Ihara, Kazuhiro Ohkubo, Emiko Tachikawa, Shoji Nakayama, Junichi Arai, Nobuyuki Kikuchi, Toru Kikuchi, Tomoyuki Kawamura, Tatsuhiko Urakami, Kenichiro Hata, Kazuhiko Nakabayashi, Yoichi Matsubara, Shin Amemiya, Tsutomu Ogata, Ichiro Yokota, Shigetaka Sugihara
BACKGROUND: Mutations in causative genes for neonatal diabetes or maturity-onset diabetes of the young have been identified in multiple patients with autoantibody-negative type 1 diabetes (T1D). OBJECTIVES: We aimed to clarify the prevalence and phenotypic characteristics of monogenic abnormalities among 89 children with autoantibody-negative insulin-requiring T1D. METHODS: Mutations in 30 genes were screened using next-generation sequencing, and copy-number alterations of 4 major causative genes were examined using multiplex-ligation-dependent probe amplification...
June 9, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28593615/a-single-dose-of-dapagliflozin-an-sglt-2-inhibitor-induces-higher-glycosuria-in-gck-and-hnf1a-mody-than-in-type-2-diabetes-mellitus
#10
J Hohendorff, M Szopa, J Skupien, M Kapusta, B Zapala, T Platek, S Mrozinska, T Parpan, W Glodzik, A Ludwig-Galezowska, B Kiec-Wilk, T Klupa, M T Malecki
AIMS: SGLT2 inhibitors are a new class of oral hypoglycemic agents used in type 2 diabetes (T2DM). Their effectiveness in maturity onset diabetes of the young (MODY) is unknown. We aimed to assess the response to a single dose of 10 mg dapagliflozin in patients with Hepatocyte Nuclear Factor 1 Alpha (HNF1A)-MODY, Glucokinase (GCK)-MODY, and type 2 diabetes. METHODS: We examined 14 HNF1A-MODY, 19 GCK-MODY, and 12 type 2 diabetes patients. All studied individuals received a single morning dose of 10 mg of dapagliflozin added to their current therapy of diabetes...
August 2017: Endocrine
https://www.readbyqxmd.com/read/28556992/management-of-sulfonylurea-treated-monogenic-diabetes-in-pregnancy-implications-of-placental-glibenclamide-transfer
#11
REVIEW
M Shepherd, A J Brook, A J Chakera, A T Hattersley
The optimum treatment for HNF1A/HNF4A maturity-onset diabetes of the young and ATP-sensitive potassium (KATP ) channel neonatal diabetes is sulfonylureas outside pregnancy, but there is little evidence regarding the most appropriate treatment during pregnancy. Glibenclamide has been widely used in the treatment of gestational diabetes, but recent data have established that glibenclamide crosses the placenta and increases risk of macrosomia and neonatal hypoglycaemia. This raises questions about its use in pregnancy...
May 30, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28540314/neonatal-diabetes-case-report-of-a-9-week-old-presenting-diabetic-ketoacidosis-due-to-an-activating-abcc8-gene-mutation
#12
Shawn Sood, Hannah Landreth, Jessee Bustinza, Laura Chalmers, Roopa Thukaram
Context: Neonatal diabetes mellitus, a rare condition occurring in approximately 1 in 500 000 live births, is defined as insulin-requiring hyperglycemia presenting in the first months of life. Neonatal diabetes can be transient or permanent, with studies characterizing the condition as a monogenic disorder. Case Report: We describe a case of a 9-week-old infant with neonatal diabetes who presented in diabetic ketoacidosis due to a mutation affecting the ABCC8 gene that encodes the SUR1 subunit of the potassium ATP channel...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28511139/a-successful-transition-to-sulfonylurea-treatment-in-male-infant-with-neonatal-diabetes-caused-by-the-novel-abcc8-gene-mutation-and-three-years-follow-up
#13
Dragan Katanic, Ivana Vorgučin, Andrew Hattersley, Sian Ellard, Jayne A L Houghton, Dragana Obreht, Marija Knežević Pogančev, Jovan Vlaški, Danijela Pavkov
Neonatal diabetes mellitus is a rare monogenic disease with incidence of 1/90,000 newborns. A case of two months aged male infant with life threatening diabetic ketoacidosis is presented with novel ABCC8 gene mutation (p.F577L), successful transition from insulin to sulfonylurea and follow-up of three years.
July 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28504725/metformin-ameliorates-core-deficits-in-a-mouse-model-of-fragile-x-syndrome
#14
Ilse Gantois, Arkady Khoutorsky, Jelena Popic, Argel Aguilar-Valles, Erika Freemantle, Ruifeng Cao, Vijendra Sharma, Tine Pooters, Anmol Nagpal, Agnieszka Skalecka, Vinh T Truong, Shane Wiebe, Isabelle A Groves, Seyed Mehdi Jafarnejad, Clément Chapat, Elizabeth A McCullagh, Karine Gamache, Karim Nader, Jean-Claude Lacaille, Christos G Gkogkas, Nahum Sonenberg
Fragile X syndrome (FXS) is the leading monogenic cause of autism spectrum disorders (ASD). Trinucleotide repeat expansions in FMR1 abolish FMRP expression, leading to hyperactivation of ERK and mTOR signaling upstream of mRNA translation. Here we show that metformin, the most widely used drug for type 2 diabetes, rescues core phenotypes in Fmr1(-/y) mice and selectively normalizes ERK signaling, eIF4E phosphorylation and the expression of MMP-9. Thus, metformin is a potential FXS therapeutic.
June 2017: Nature Medicine
https://www.readbyqxmd.com/read/28493909/hnf1%C3%AE-defect-influences-post-prandial-lipid-regulation
#15
Matthieu St-Jean, François Boudreau, André C Carpentier, Marie-France Hivert
PURPOSE: Hepatocyte nuclear factor 1 alpha (HNF1α) defects cause Mature Onset Diabetes of the Young type 3 (MODY3), characterized by defects in beta-cell insulin secretion. However, HNF1α is involved in many other metabolic pathways with relevance for monogenic or polygenic type 2 diabetes. We aimed to investigate gut hormones, lipids, and insulin regulation in response to a meal test in HNF1α defect carriers (MODY3) compared to non-diabetic subjects (controls) and type 2 diabetes (T2D)...
2017: PloS One
https://www.readbyqxmd.com/read/28473463/recessively-inherited-lrba-mutations-cause-autoimmunity-presenting-as-neonatal-diabetes
#16
Matthew B Johnson, Elisa De Franco, Hana Lango Allen, Aisha Al Senani, Nancy Elbarbary, Zeynep Siklar, Merih Berberoglu, Zineb Imane, Alireza Haghighi, Zahra Razavi, Irfan Ullah, Saif Alyaarubi, Daphne Gardner, Sian Ellard, Andrew T Hattersley, Sarah E Flanagan
Young-onset autoimmune diabetes associated with additional autoimmunity usually reflects a polygenic predisposition, but rare cases result from monogenic autoimmunity. Diagnosing monogenic autoimmunity is crucial for patients' prognosis and clinical management. We sought to identify novel genetic causes of autoimmunity presenting with neonatal diabetes (NDM) (diagnosis <6 months). We performed exome sequencing in a patient with NDM and autoimmune lymphoproliferative syndrome and his unrelated, unaffected parents and identified compound heterozygous null mutations in LRBA Biallelic LRBA mutations cause common variable immunodeficiency-8; however, NDM has not been confirmed in this disorder...
August 2017: Diabetes
https://www.readbyqxmd.com/read/28460053/utilizing-the-kcnj11-gene-mutations-in-spotting-egyptian-patients-with-permanent-neonatal-diabetes-who-can-benefit-from-treatment-shift
#17
Dina M Ahmed, Soha M Abdel Dayem, Mona Abdel Kader, Rania H Khalifa, Dalia H El-Lebedy, Solaf A Kamel, Shereen M Shawky
Background: Neonatal diabetes mellitus (NDM) is a monogenic form of diabetes mellitus. Until now, patients in developing countries who had this condition had been misdiagnosed as having type 1 diabetes mellitus and accordingly directed to erroneous, ineffective, and costly therapeutic regimens. Objective: To detect Egyptian patients who harbor pathological variant in the KCNJ11 gene, so that their treatment regimen can be modified as needed to increase its effectiveness...
April 27, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/28447115/human-genetics-as-a-model-for-target-validation-finding-new-therapies-for-diabetes
#18
REVIEW
Soren K Thomsen, Anna L Gloyn
Type 2 diabetes is a global epidemic with major effects on healthcare expenditure and quality of life. Currently available treatments are inadequate for the prevention of comorbidities, yet progress towards new therapies remains slow. A major barrier is the insufficiency of traditional preclinical models for predicting drug efficacy and safety. Human genetics offers a complementary model to assess causal mechanisms for target validation. Genetic perturbations are 'experiments of nature' that provide a uniquely relevant window into the long-term effects of modulating specific targets...
June 2017: Diabetologia
https://www.readbyqxmd.com/read/28436541/pdx1-mody-and-dorsal-pancreatic-agenesis-new-phenotype-of-a-rare-disease
#19
L A Caetano, L S Santana, A D Costa-Riquetto, A M Lerario, M Nery, G F Nogueira, C D Ortega, M S Rocha, Aal Jorge, M G Teles
Maturity-Onset Diabetes of the Young (MODY) type 4 or PDX1-MODY is a rare form of monogenic diabetes caused by heterozygous variants in PDX1. Pancreatic developmental anomalies related to PDX1 are reported only in neonatal diabetes cases. Here, we describe dorsal pancreatic agenesis in two patients with PDX1-MODY. The proband presented with diabetes since 14 years of age and maintained regular glycemic control with low doses of basal insulin and detectable C-peptide levels after 30 years with diabetes. A diagnosis of MODY was suspected...
April 24, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28436179/monogenic-diabetes-prevalence-among-polish-children-summary-of-11%C3%A2-years-long-nationwide-genetic-screening-program
#20
Beata Małachowska, Maciej Borowiec, Karolina Antosik, Arkadiusz Michalak, Anna Baranowska-Jaźwiecka, Grażyna Deja, Przemysława Jarosz-Chobot, Agnieszka Brandt, Małgorzata Myśliwiec, Małgorzata Stelmach, Joanna Nazim, Jadwiga Peczyńska, Barbara Głowińska-Olszewska, Anita Horodnicka-Józwa, Mieczysław Walczak, Maciej T Małecki, Agnieszka Zmysłowska, Agnieszka Szadkowska, Wojciech Fendler, Wojciech Młynarski
BACKGROUND: Estimated monogenic diabetes (MD) prevalence increases as screening programs proceeds. OBJECTIVE: To estimate prevalence of MD among Polish children. SUBJECTS: Patients and their family members suspected of suffering from MD (defined as causative mutation in one of the Maturity Onset Diabetes of the Young or permanent neonatal diabetes mellitus genes) were recruited between January 2005 and December 2015. METHODS: Nationwide prevalence was estimated based on data from 6 administrative provinces (out of 16 in Poland) with high referral rates of patients (>10 per 100 000 children)...
April 24, 2017: Pediatric Diabetes
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