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monogenic diabetes

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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
#1
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.
May 3, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28504725/metformin-ameliorates-core-deficits-in-a-mouse-model-of-fragile-x-syndrome
#2
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.
May 15, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28493909/hnf1%C3%AE-defect-influences-post-prandial-lipid-regulation
#3
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
#4
Matthew B Johnson, Elisa De Franco, Hana Lango-Allen, Aisha Al Senani, Nancy Elbarbary, Zeynep Siklar, Merih Berberoglu, Zineb Imane, Alireza Haghighi, 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...
May 4, 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
#5
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
#6
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...
April 26, 2017: Diabetologia
https://www.readbyqxmd.com/read/28436541/pdx1-mody-and-dorsal-pancreatic-agenesis-new-phenotype-of-a-rare-disease
#7
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
#8
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
https://www.readbyqxmd.com/read/28432734/monogenic-diabetes-syndromes-locus-specific-databases-for-alstr%C3%A3-m-wolfram-and-thiamine-responsive-megaloblastic-anaemia
#9
Dewi Astuti, Ataf Sabir, Piers Fulton, Malgorzata Zatyka, Denise Williams, Carol Hardy, Gabriella Milan, Francesca Favaretto, Patrick Yu-Wai-Man, Julia Rohayem, Miguel López de Heredia, Tamara Hershey, Lisbeth Tranebjaerg, Jian-Hua Chen, Annabel Chaussenot, Virginia Nunes, Bess Marshall, Susan McAfferty, Vallo Tillmann, Pietro Maffei, Veronique Paquis-Flucklinger, Tarekign Geberhiwot, Wojciech Mlynarski, Kay Parkinson, Virginie Picard, Gema Esteban Bueno, Renuka Dias, Amy Arnold, Caitlin Richens, Richard Paisey, Fumi Urano, Robert Semple, Richard Sinnott, Timothy G Barrett
We developed a variant database for diabetes syndrome genes, using the Leiden Open Variation Database platform, containing observed phenotypes matched to the genetic variations. We populated it with 628 published disease associated variants (December 2016) for: WFS1 (n = 309), CISD2 (n = 3), ALMS1 (n = 268), and SLC19A2 (n = 48) for Wolfram type 1, Wolfram type 2, Alström and Thiamine-responsive megaloblastic anaemia syndromes respectively; and included 23 previously unpublished novel germline variants in WFS1 and 17 variants in ALMS1...
April 21, 2017: Human Mutation
https://www.readbyqxmd.com/read/28420733/detection-of-interferon-alpha-protein-reveals-differential-levels-and-cellular-sources-in-disease
#10
Mathieu P Rodero, Jérémie Decalf, Vincent Bondet, David Hunt, Gillian I Rice, Scott Werneke, Sarah L McGlasson, Marie-Alexandra Alyanakian, Brigitte Bader-Meunier, Christine Barnerias, Nathalia Bellon, Alexandre Belot, Christine Bodemer, Tracy A Briggs, Isabelle Desguerre, Marie-Louise Frémond, Marie Hully, Arn M J M van den Maagdenberg, Isabelle Melki, Isabelle Meyts, Lucile Musset, Nadine Pelzer, Pierre Quartier, Gisela M Terwindt, Joanna Wardlaw, Stewart Wiseman, Frédéric Rieux-Laucat, Yoann Rose, Bénédicte Neven, Christina Hertel, Adrian Hayday, Matthew L Albert, Flore Rozenberg, Yanick J Crow, Darragh Duffy
Type I interferons (IFNs) are essential mediators of antiviral responses. These cytokines have been implicated in the pathogenesis of autoimmunity, most notably systemic lupus erythematosus (SLE), diabetes mellitus, and dermatomyositis, as well as monogenic type I interferonopathies. Despite a fundamental role in health and disease, the direct quantification of type I IFNs has been challenging. Using single-molecule array (Simoa) digital ELISA technology, we recorded attomolar concentrations of IFNα in healthy donors, viral infection, and complex and monogenic interferonopathies...
May 1, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28420700/diabetes-associated-clinical-spectrum-long-term-prognosis-and-genotype-phenotype-correlations-in-201-adult-patients-with-hepatocyte-nuclear-factor-1-b-hnf1b-molecular-defects
#11
Danièle Dubois-Laforgue, Erika Cornu, Cécile Saint-Martin, Joël Coste, Christine Bellanné-Chantelot, José Timsit
OBJECTIVE: Molecular defects of hepatocyte nuclear factor 1B (HNF1B) are associated with a multiorgan disease, including diabetes (maturity-onset diabetes of the young 5) and kidney abnormalities. The HNF1B-syndrome is related to HNF1B mutations or to a 17q12 deletion spanning 15 genes, including HNF1B. Here, we described HNF1B-related diabetes and associated phenotypes and assessed genotype/phenotype correlations at diagnosis and in the long-term. RESEARCH DESIGN AND METHODS: This multicenter retrospective cohort study included 201 patients, aged 18 or older at follow-up, with HNF1B mutations (n = 101) or deletion (n = 100)...
April 18, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28395978/the-spectrum-of-hnf1a-gene-mutations-in-patients-with-mody-3-phenotype-and-identification-of-three-novel-germline-mutations-in-turkish-population
#12
Emin Karaca, Huseyin Onay, Sevki Cetinkalp, Ayca Aykut, Damla Göksen, Samim Ozen, Tahir Atik, Sukran Darcan, Ismihan Merve Tekin, Ferda Ozkınay
BACKGROUND: Maturity-onset diabetes of the young (MODY) is a monogenic form of diabetes mellitus characterized by autosomal dominant inheritance, early age of onset, and pancreatic beta cell dysfunction. Heterozygous mutations in several genes may cause MODY. METHODS: In the present study, we investigated the molecular spectrum of HNF1A (hepatocyte nuclear factor 1a) mutations, in the individuals referred to a reference center for molecular genetic analysis. Mutations screening was performed in a group of 136 unrelated patients (average age 17...
March 31, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28350539/personalized-precision-medicine-in-extreme-preterm-infants-with-transient-neonatal-diabetes-mellitus
#13
Ranjit I Kylat, Rajan Senguttuvan, Mohammed Y Bader
Although hyperglycemia is common in neonates, especially preterm infants, a diagnosis of neonatal diabetes mellitus (NDM) is rarely made. NDM can be permanent (45%), transient (45%) or syndromic (10%). Of the 95% of identifiable mutations for NDM, methylation defects in 6q24, KCNJ11, ABCC8, and INS account for the majority. Two cases of transient NDM in extremely preterm, 24 weeks' gestational age (GA) triplets, due to a missense mutation c.685G>A in the KCNJ11 gene are presented. Both patients were successfully transitioned from insulin to Glyburide (Glibenclamide) at 2 months of age...
March 28, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28341696/a-low-frequency-inactivating-akt2-variant-enriched-in-the-finnish-population-is-associated-with-fasting-insulin-levels-and-type-2-diabetes-risk
#14
Alisa Manning, Heather M Highland, Jessica Gasser, Xueling Sim, Taru Tukiainen, Pierre Fontanillas, Niels Grarup, Manuel A Rivas, Anubha Mahajan, Adam E Locke, Pablo Cingolani, Tune H Pers, Ana Viñuela, Andrew A Brown, Ying Wu, Jason Flannick, Christian Fuchsberger, Eric R Gamazon, Kyle J Gaulton, Hae Kyung Im, Tanya M Teslovich, Thomas W Blackwell, Jette Bork-Jensen, Noël P Burtt, Yuhui Chen, Todd Green, Christopher Hartl, Hyun Min Kang, Ashish Kumar, Claes Ladenvall, Clement Ma, Loukas Moutsianas, Richard D Pearson, John R B Perry, N William Rayner, Neil R Robertson, Laura J Scott, Martijn van de Bunt, Johan G Eriksson, Antti Jula, Seppo Koskinen, Terho Lehtimäki, Aarno Palotie, Olli T Raitakari, Suzanne Br Jacobs, Jennifer Wessel, Audrey Y Chu, Robert A Scott, Mark O Goodarzi, Christine Blancher, Gemma Buck, David Buck, Peter S Chines, Stacey Gabriel, Anette P Gjesing, Christopher J Groves, Mette Hollensted, Jeroen R Huyghe, Anne U Jackson, Goo Jun, Johanne Marie Justesen, Massimo Mangino, Jacquelyn Murphy, Matt Neville, Robert Onofrio, Kerrin S Small, Heather M Stringham, Joseph Trakalo, Eric Banks, Jason Carey, Mauricio O Carneiro, Mark DePristo, Yossi Farjoun, Timothy Fennell, Jacqueline I Goldstein, George Grant, Martin Hrabé de Angelis, Jared Maguire, Benjamin M Neale, Ryan Poplin, Shaun Purcell, Thomas Schwarzmayr, Khalid Shakir, Joshua D Smith, Tim M Strom, Thomas Wieland, Jaana Lindstrom, Ivan Brandslund, Cramer Christensen, Gabriela L Surdulescu, Timo A Lakka, Alex S F Doney, Peter Nilsson, Nicholas J Wareham, Claudia Langenberg, Tibor V Varga, Paul W Franks, Olov Rolandsson, Anders H Rosengren, Vidya S Farook, Farook Thameem, Sobha Puppala, Satish Kumar, Donna M Lehman, Christopher P Jenkinson, Joanne E Curran, Daniel Esten Hale, Sharon P Fowler, Rector Arya, Ralph A DeFronzo, Hanna E Abboud, Ann-Christine Syvänen, Pamela J Hicks, Nicholette D Palmer, Maggie C Y Ng, Donald W Bowden, Barry I Freedman, Tõnu Esko, Reedik Mägi, Lili Milani, Evelin Mihailov, Andres Metspalu, Narisu Narisu, Leena Kinnunen, Lori L Bonnycastle, Amy Swift, Dorota Pasko, Andrew R Wood, João Fadista, Toni I Pollin, Nir Barzilai, Gil Atzmon, Benjamin Glaser, Barbara Thorand, Konstantin Strauch, Annette Peters, Michael Roden, Martina Müller-Nurasyid, Liming Liang, Jennifer Kriebel, Thomas Illig, Harald Grallert, Christian Gieger, Christa Meisinger, Lars Lannfelt, Solomon K Musani, Michael Griswold, Herman A Taylor, Gregory Wilson, Adolfo Correa, Heikki Oksa, William R Scott, Uzma Afzal, Sian-Tsung Tan, Marie Loh, John C Chambers, Jobanpreet Sehmi, Jaspal Singh Kooner, Benjamin Lehne, Yoon Shin Cho, Jong-Young Lee, Bok-Ghee Han, Annemari Käräjämäki, Qibin Qi, Lu Qi, Jinyan Huang, Frank B Hu, Olle Melander, Marju Orho-Melander, Jennifer E Below, David Aguilar, Tien Yin Wong, Jianjun Liu, Chiea-Chuen Khor, Kee Seng Chia, Wei Yen Lim, Ching-Yu Cheng, Edmund Chan, E Shyong Tai, Tin Aung, Allan Linneberg, Bo Isomaa, Thomas Meitinger, Tiinamaija Tuomi, Liisa Hakaste, Jasmina Kravic, Marit E Jørgensen, Torsten Lauritzen, Panos Deloukas, Kathleen E Stirrups, Katharine R Owen, Andrew J Farmer, Timothy M Frayling, Stephen P O'Rahilly, Mark Walker, Jonathan C Levy, Dylan Hodgkiss, Andrew T Hattersley, Teemu Kuulasmaa, Alena Stančáková, Inês Barroso, Dwaipayan Bharadwaj, Juliana Chan, Giriraj R Chandak, Mark J Daly, Peter J Donnelly, Shah B Ebrahim, Paul Elliott, Tasha Fingerlin, Philippe Froguel, Cheng Hu, Weiping Jia, Ronald C W Ma, Gilean McVean, Taesung Park, Dorairaj Prabhakaran, Manjinder Sandhu, James Scott, Rob Sladek, Nikhil Tandon, Yik Ying Teo, Eleftheria Zeggini, Richard M Watanabe, Heikki A Koistinen, Y Antero Kesaniemi, Matti Uusitupa, Timothy D Spector, Veikko Salomaa, Rainer Rauramaa, Colin N A Palmer, Inga Prokopenko, Andrew D Morris, Richard N Bergman, Francis S Collins, Lars Lind, Erik Ingelsson, Jaakko Tuomilehto, Fredrik Karpe, Leif Groop, Torben Jørgensen, Torben Hansen, Oluf Pedersen, Johanna Kuusisto, Gonçalo Abecasis, Graeme I Bell, John Blangero, Nancy J Cox, Ravindranath Duggirala, Mark Seielstad, James G Wilson, Josee Dupuis, Samuli Ripatti, Craig L Hanis, Jose C Florez, Karen L Mohlke, James B Meigs, Markku Laakso, Andrew P Morris, Michael Boehnke, David Altshuler, Mark I McCarthy, Anna L Gloyn, Cecilia M Lindgren
To identify novel coding association signals and facilitate characterization of mechanisms influencing glycemic traits and type 2 diabetes risk, we analyzed 109,215 variants derived from exome array genotyping together with an additional 390,225 variants from exome sequence in up to 39,339 normoglycemic individuals from five ancestry groups. We identified a novel association between the coding variant (p.Pro50Thr) in AKT2 and fasting insulin, a gene in which rare fully penetrant mutations are causal for monogenic glycemic disorders...
March 24, 2017: Diabetes
https://www.readbyqxmd.com/read/28323911/monogenic-diabetes-accounts-for-6-3-of-cases-referred-to-15-italian-pediatric-diabetes-centers-during-2007-2012
#15
Maurizio Delvecchio, Enza Mozzillo, Giuseppina Salzano, Dario Iafusco, Giulio Frontino, Patrizia I Patera, Ivana Rabbone, Valentino Cherubini, Valeria Grasso, Nadia Tinto, Sabrina Giglio, Giovanna Contreas, Rosa Di Paola, Alessandro Salina, Vittoria Cauvin, Stefano Tumini, Giuseppe d'Annunzio, Lorenzo Iughetti, Vilma Mantovani, Giulio Maltoni, Sonia Toni, Marco Marigliano, Fabrizio Barbetti
Context: Etiologic diagnosis of diabetes may impact on therapeutic strategy, and prognosis of chronic complications. Objective: The aim of the study was to establish the relative percentage of different diabetes subtypes in patients attending Italian pediatric diabetes centers, and the influence of etiologic diagnosis on therapy. Design, Setting and Patients: This was a retrospective study. Clinical records of 3781 consecutive patients (age: 0-18 years) referred to fifteen pediatric diabetes clinics and diagnosed with diabetes or IFG between Jan/1/2007 and Dec/31/2012 were examined...
February 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28314945/precision-diabetes-learning-from-monogenic-diabetes
#16
REVIEW
Andrew T Hattersley, Kashyap A Patel
The precision medicine approach of tailoring treatment to the individual characteristics of each patient or subgroup has been a great success in monogenic diabetes subtypes, MODY and neonatal diabetes. This review examines what has led to the success of a precision medicine approach in monogenic diabetes (precision diabetes) and outlines possible implications for type 2 diabetes. For monogenic diabetes, the molecular genetics can define discrete aetiological subtypes that have profound implications on diabetes treatment and can predict future development of associated clinical features, allowing early preventative or supportive treatment...
March 17, 2017: Diabetologia
https://www.readbyqxmd.com/read/28283684/pharmacogenetics-in-type-2-diabetes-precision-medicine-or-discovery-tool
#17
REVIEW
Jose C Florez
In recent years, technological and analytical advances have led to an explosion in the discovery of genetic loci associated with type 2 diabetes. However, their ability to improve prediction of disease outcomes beyond standard clinical risk factors has been limited. On the other hand, genetic effects on drug response may be stronger than those commonly seen for disease incidence. Pharmacogenetic findings may aid in identifying new drug targets, elucidate pathophysiology, unravel disease heterogeneity, help prioritise specific genes in regions of genetic association, and contribute to personalised or precision treatment...
March 10, 2017: Diabetologia
https://www.readbyqxmd.com/read/28271591/a-novel-heterozygous-mutation-of-the-wfs1-gene-leading-to-constitutive-endoplasmic-reticulum-stress-is-the-cause-of-wolfram-syndrome
#18
Shuntaro Morikawa, Toshihiro Tajima, Akie Nakamura, Katsura Ishizu, Tadashi Ariga
BACKGROUND: Wolfram syndrome (WS) is a disorder characterized by the association of insulin-dependent diabetes mellitus (DM), diabetes insipidus, deafness, and optic nerve atrophy. WS is caused by WFS1 mutations encoding WFS1 protein expressed in endoplasmic reticulum (ER). During ER protein synthesis, misfolded and unfolded proteins accumulate, known as "ER stress". This is attenuated by the unfolded protein response (UPR), which recovers and maintains ER functions. Because WFS1 is a UPR component, mutant WFS1 might cause unresolvable ER stress conditions and cell apoptosis, the major causes underlying WS symptoms...
March 8, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28247534/heterogeneity-in-phenotype-of-hyperinsulinism-caused-by-activating-glucokinase-mutations-a-novel-mutation-and-its-functional-characterization
#19
Rosa Martínez, Ángel Gutierrez-Nogués, Concepción Fernández-Ramos, Teresa Velayos, Amaia Vela, María-Ángeles Navas, Luis Castaño
BACKGROUND: Mutations in the GCK gene lead to different forms of glucokinase (GCK)-disease, activating mutations cause hyperinsulinaemic hypoglycaemia while inactivating mutations cause monogenic diabetes. Hyperinsulinism (HI) is a heterogeneous condition with a significant genetic component. The major causes are channelopathies, the other forms are rare and being caused by mutations in genes such as GCK. OBJECTIVE: To describe the clinical and genetic presentation of four families with activating GCK mutations, and to explore the pathogenicity of the novel mutation identified through functional studies...
March 1, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28197978/managing-cardiovascular-risk-in-lysosomal-acid-lipase-deficiency
#20
REVIEW
James J Maciejko
Lysosomal acid lipase deficiency (LAL-D) is a rare, life-threatening, autosomal recessive, lysosomal storage disease caused by mutations in the LIPA gene, which encodes for lysosomal acid lipase (LAL). This enzyme is necessary for the hydrolysis of cholesteryl ester and triglyceride in lysosomes. Deficient LAL activity causes accumulation of these lipids in lysosomes and a marked decrease in the cytoplasmic free cholesterol concentration, leading to dysfunctional cholesterol homeostasis. The accumulation of neutral lipid occurs predominantly in liver, spleen, and macrophages throughout the body, and the aberrant cholesterol homeostasis causes a marked dyslipidemia...
June 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
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