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https://www.readbyqxmd.com/read/29751826/possible-association-between-abcc8-c49620t-polymorphism-and-type-2-diabetes-in-a-nigerian-population
#1
Godwill Azeh Engwa, Friday Nweke Nwalo, Claribel Chidimma Chikezie, Christie Oby Onyia, Opeolu Oyejide Ojo, Wilfred Fon Mbacham, Benjamin Ewa Ubi
BACKGROUND: The association between ABCC8 gene C49620T polymorphism and type 2 diabetes (T2D) in populations of diverse ethnic backgrounds has been reported. However, such occurrence in an African population is yet to be established. This case-control study involving 73 T2D and 75 non-diabetic (ND) patients investigated the occurrence of this polymorphism among T2D patients in Nigeria and assessed its relationship with body lipids of patients. METHODS: Demographic and clinical characteristics of patients were collected and lipid profile indices including total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL) and high density lipoprotein (HDL) were assayed...
May 12, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29739729/congenital-hyperinsulinism-and-evolution-to-sulfonylurea-responsive-diabetes-later-in-life-due-to-a-novel-homozygous-p-l171f-abcc8-mutation
#2
Emregül Işık, Huseyin Demirbilek, Jayne A L Houghton, Sian Ellard, Sarah E Flanagan, Khalid Hussain
BACKGROUND: Congenital hyperinsulinism (CHI) is the most common cause of persistent hypoglycemia in infants and children. Recessive inactivating mutations in the ABCC8 and KCNJ11 genes account for approximately 50 % of all CHI cases. Hyperinsulinaemic hypoglycaemia (HH) in infancy and diabetes in later life have been reported in subjects with HNF1A , HNF4A and ABCC8 mutations. CASE REPORT: Herein, we present a child who was diagnosed with CHI at birth, then developed diabetes mellitus at the age of 9 years due to a novel homozygous missense, p...
March 29, 2018: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/29726111/clinical-usefulness-of-comprehensive-genetic-screening-in-mody-a-novel-abcc8-mutation-in-a-previously-screened-family
#3
Stephanie Robyn Johnson, Paul Leo, Louise Sonia Conwell, Mark Harris, Matthew Arthur Brown, Emma Letitia Duncan
Maturity-onset diabetes of the young (MODY) is the commonest form of monogenic diabetes, resulting from dominant mutations in one of fourteen genes that regulate beta-cell function (HNF4A, GCK, HNF1A, PDX1, HNF1B, NEUROD1, KLF11, CEL, PAX4, INS, BLK, ABCC8,KCNJ11 and APPL1 1,2 ). MODY accounts for 2-2.5% of childhood diabetes 3 , yet MODY genetic screening is uncommon, even in highly suggestive families, and when performed often limited to the commonest genes (e.g.HNF1A and GCK) 4 .
May 4, 2018: Journal of Diabetes
https://www.readbyqxmd.com/read/29681852/genotypic-and-phenotypic-factors-influencing-drug-response-in-mexican-patients-with-type-2-diabetes-mellitus
#4
Hector E Sanchez-Ibarra, Luisa M Reyes-Cortes, Xian-Li Jiang, Claudia M Luna-Aguirre, Dionicio Aguirre-Trevino, Ivan A Morales-Alvarado, Rafael B Leon-Cachon, Fernando Lavalle-Gonzalez, Faruck Morcos, Hugo A Barrera-Saldaña
The treatment of Type 2 Diabetes Mellitus (T2DM) consists primarily of oral antidiabetic drugs (OADs) that stimulate insulin secretion, such as sulfonylureas (SUs) and reduce hepatic glucose production (e.g., biguanides), among others. The marked inter-individual differences among T2DM patients' response to these drugs have become an issue on prescribing and dosing efficiently. In this study, fourteen polymorphisms selected from Genome-wide association studies (GWAS) were screened in 495 T2DM Mexican patients previously treated with OADs to find the relationship between the presence of these polymorphisms and response to the OADs...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29675256/a-case-with-relapsed-transient-neonatal-diabetes-mellitus-treated-with-sulfonylurea-ending-chronic-insulin-requirement
#5
Akihiko Ando, Shoichiro Nagasaka, Shun Ishibashi
We report a case of a woman with diabetes mellitus caused by a genetic defect in ABCC8 -coding sulfonylurea receptor 1 (SUR1), a subunit of the ATP-sensitive potassium (KATP ) channel protein. She was diagnosed with diabetes at 7 days after birth. After intravenous insulin drip for 1 month, her hyperglycaemia remitted. At the age of 13 years, her diabetes relapsed, and after that she had been treated by intensive insulin therapy for 25 years with relatively poor glycaemic control. She was switched to oral sulfonylurea therapy and attained euglycaemia...
2018: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29674479/regionally-clustered-abcc8-polymorphisms-in-a-prospective-cohort-predict-cerebral-oedema-and-outcome-in-severe-traumatic-brain-injury
#6
Ruchira Menka Jha, Theresa A Koleck, Ava M Puccio, David O Okonkwo, Seo-Young Park, Benjamin E Zusman, Robert S B Clark, Lori A Shutter, Jessica S Wallisch, Philip E Empey, Patrick M Kochanek, Yvette P Conley
OBJECTIVE: ABCC8 encodes sulfonylurea receptor 1, a key regulatory protein of cerebral oedema in many neurological disorders including traumatic brain injury (TBI). Sulfonylurea-receptor-1 inhibition has been promising in ameliorating cerebral oedema in clinical trials. We evaluated whether ABCC8 tag single-nucleotide polymorphisms predicted oedema and outcome in TBI. METHODS: DNA was extracted from 485 prospectively enrolled patients with severe TBI. 410 were analysed after quality control...
April 19, 2018: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29626590/altered-expression-of-wfs1-and-notch2-genes-associated-with-diabetic-nephropathy-in-t2dm-patients
#7
Sahar A Sharaf, Nagwa A Kantoush, Dina F Ayoub, Alshaymaa A Ibrahim, Amaal A Abdelaal, Rokaya Abdel Aziz, Mahmoud M ElHefnawi, Amira N Ahmed
AIM: The increased incidence of type 2 diabetes mellitus (T2DM) and the importance of early identification and management of its complications, especially diabetic nephropathy (DN), have spotted the light on genetic factors that increase risk of T2DM and its related nephropathy. The present study aimed at investigating expression of (KCNJ11, ABCC8, JAZF1, WFS1, PPARG, NOTCH2 and EXOSC4) genes in peripheral blood of T2DM patients. METHOD: The study included 30 non-complicated T2DM patients, 30 patients with DN and 40 healthy controls...
April 4, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29546446/cyp3a4-and-gck-genetic-polymorphisms-are-the-risk-factors-of-tacrolimus-induced-new-onset-diabetes-after-transplantation-in-renal-transplant-recipients
#8
Daohua Shi, Tiancheng Xie, Jie Deng, Peiguang Niu, Weizhen Wu
PURPOSE: We intend to investigate the association between tacrolimus-induced new-onset diabetes after transplantation (NODAT) and polymorphisms of CYP3A4, CYP3A5, ATP-binding cassette transporter sub-family C member 8 (ABCC8), and glucokinase (GCK) in renal transplant recipients. METHODS: Polymorphisms of CYP3A4 *18B, CYP3A5 *3, ABCC8 T-3C, and GCK G-30A were genotyped in 169 renal transplant recipients. Trough concentrations of tacrolimus were detected by an ELISA kit...
March 15, 2018: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29527407/transient-neonatal-diabetes-mellitus-in-a-very-preterm-infant-due-to-abcc8-mutation
#9
Barbara Piccini, Caterina Coviello, Livia Drovandi, Artuso Rosangela, Francesca Monzali, Emilio Casalini, Sabrina Giglio, Sonia Toni, Carlo Dani
Neonatal diabetes mellitus (NDM) is a monogenic form of diabetes occurring within 6 months from birth. NDM can be permanent or transient (TNDM). We report the case of a preterm infant with TNDM due to an ABCC8 mutation identified by next-generation sequencing. The pancreatic adenosine triphosphate (ATP)-sensitive K+ (K-ATP) channel is a key regulator of insulin secretion. Gain-of-function mutations in the genes encoding the Kir6.2 (KCNJ11) and SUR1 (ABCC8) subunits of the channel cause neonatal diabetes. The patient was successfully managed with insulin lispro at a 1:100 dilution, drawn up in an insulin pen injector with a 4-mm needle...
January 2018: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/29493090/clinical-heterogeneity-of-hyperinsulinism-due-to-hnf1a-and-hnf4a-mutations
#10
Joanna Yuet-Ling Tung, Kara Boodhansingh, Charles A Stanley, Diva D De León
BACKGROUND: Dominant inactivating mutations in HNF1A and HNF4A have been described to cause hyperinsulinism (HI) before evolving to diabetes. However, information available in the literature regarding the clinical phenotype is limited. OBJECTIVE: To report the prevalence of HNF1A and HNF4A mutations in a large cohort of children with HI, and to describe their genotypes and phenotypes. DESIGN: Retrospective descriptive study. METHODS: Medical records were reviewed to extract clinical information...
March 1, 2018: Pediatric Diabetes
https://www.readbyqxmd.com/read/29492846/k-atp-channel-expression-and-genetic-polymorphisms-associated-with-progression-and-survival-in-amyotrophic-lateral-sclerosis
#11
José M Vidal-Taboada, Marco Pugliese, Maria Salvadó, Josep Gámez, Nicole Mahy, Manuel J Rodríguez
The ATP-sensitive potassium (KATP ) channel directly regulates the microglia-mediated inflammatory response following CNS injury. To determine the putative role of the KATP channel in amyotrophic lateral sclerosis (ALS) pathology, we investigated whether ALS induces changes in KATP channel expression in the spinal cord and motor cortex. We also characterized new functional variants of human ABCC8, ABCC9, KCNJ8, and KCNJ11 genes encoding for the KATP channel and analyzed their association with ALS risk, rate of progression, and survival in a Spanish ALS cohort...
February 28, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29486427/pharmacogenetics-and-target-identification-in-diabetes
#12
REVIEW
Ewan R Pearson
In diabetes, pharmacogenetics can be used both to identify patient subgroups who will have most benefit and/or least harm from a particularly treatment, and to gain insights into the molecular mechanisms of drug action and disease aetiology. There is increasing evidence that genetic variation alters response to diabetes treatments-both in terms of glycaemic response and side effects. This can be seen with dramatic impact on clinical care, in patients with genetic forms of diabetes such as Maturity Onset Diabetes of the Young caused by HNF1A mutations, and Neonatal diabetes due to activating mutations in ABCC8 or KCNJ11...
February 24, 2018: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/29473496/modulation-of-hepatic-mrp3-abcc3-by-xenobiotics-and-pathophysiological-conditions-role-in-drug-pharmacokinetics
#13
Carolina I Ghanem, Jose E Manautou
Liver transporters play an important role in the pharmacokinetics and disposition of pharmaceuticals, environmental contaminants, and endogenous compounds. Among them, the family of ATP-Binding Cassette (ABC) transporters is the most important due to its role in the transport of endo- and xenobiotics. The ABCC sub-family is the largest one, consisting of 13 members that include the cystic fibrosis conductance regulator (CFTR/ABCC7); the sulfonylurea receptors (SUR1/ABCC8 and SUR2/ABCC9) and the multidrug resistance-associated proteins (MRPs)...
February 21, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29454299/congenital-forms-of-diabetes-the-beta-cell-and-beyond
#14
REVIEW
Lisa R Letourneau, Siri Atma W Greeley
The majority of patients diagnosed with diabetes less than 6 months of age, and many cases diagnosed between 6 and 12 months of age, have a gene mutation that causes permanent or transient hyperglycemia. Recent research advances have allowed for the discovery of new causes of congenital diabetes, including genes involved in pancreatic development (GATA4, NKX2-2, MNX1) and monogenic causes of autoimmune dysregulation (STAT3, LRBA). Ongoing follow-up of patients with KCNJ11 and ABCC8 mutations has supported the safety and efficacy of sulfonylureas, as well as the use of insulin pumps and continuous glucose monitors in infants with insulin-requiring forms of monogenic diabetes...
February 14, 2018: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/29439679/comprehensive-genomic-analysis-identifies-pathogenic-variants-in-maturity-onset-diabetes-of-the-young-mody-patients-in-south-india
#15
Viswanathan Mohan, Venkatesan Radha, Thong T Nguyen, Eric W Stawiski, Kanika Bajaj Pahuja, Leonard D Goldstein, Jennifer Tom, Ranjit Mohan Anjana, Monica Kong-Beltran, Tushar Bhangale, Suresh Jahnavi, Radhakrishnan Chandni, Vijay Gayathri, Paul George, Na Zhang, Sakthivel Murugan, Sameer Phalke, Subhra Chaudhuri, Ravi Gupta, Jingli Zhang, Sam Santhosh, Jeremy Stinson, Zora Modrusan, V L Ramprasad, Somasekar Seshagiri, Andrew S Peterson
BACKGROUND: Maturity-onset diabetes of the young (MODY) is an early-onset, autosomal dominant form of non-insulin dependent diabetes. Genetic diagnosis of MODY can transform patient management. Earlier data on the genetic predisposition to MODY have come primarily from familial studies in populations of European origin. METHODS: In this study, we carried out a comprehensive genomic analysis of 289 individuals from India that included 152 clinically diagnosed MODY cases to identify variants in known MODY genes...
February 13, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29396966/search-for-pharmacoepigenetic-correlations-in-type-2-diabetes-under-sulfonylurea-treatment
#16
Makrina Karaglani, Georgia Ragia, Maria Panagopoulou, Ioanna Balgkouranidou, Evangelia Nena, George Kolios, Nikolaos Papanas, Vangelis G Manolopoulos, Ekaterini Chatzaki
Sulfonylureas are insulin secretagogues which act in pancreatic β cells by blocking the KATP channels encoded by KCNJ11 and ABCC8 genes. In the present study, a pharmacoepigenetic approach was applied for the first time, investigating the correlation of KCNJ11 and ABCC8 gene promoter methylation with sulfonylureas-induced mild hypoglycemic events as well as the KCNJ11 E23K genotype. Sodium bisulfite-treated genomic DNA of 171 sulfonylureas treated T2DM patients previously genotyped for KCNJ11 E23K, including 88 that had experienced drug-associated hypoglycemia and 83 that had never experienced hypoglycemia, were analyzed for DNA methylation of KCNJ11 and ABCC8 gene promoters via quantitative Methylation-Specific PCR...
February 2, 2018: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/29351489/cooperative-function-of-pdx1-and-oc1-in-multipotent-pancreatic-progenitors-impacts-postnatal-islet-maturation-and-adaptability
#17
Peter A Kropp, Jennifer C Dunn, Bethany A Carboneau, Doris A Stoffers, Maureen Gannon
The transcription factors pancreatic and duodenal homeobox 1 (Pdx1) and onecut1 (Oc1) are coexpressed in multipotent pancreatic progenitors (MPCs), but their expression patterns diverge in hormone-expressing cells, with Oc1 expression being extinguished in the endocrine lineage and Pdx1 being maintained at high levels in β-cells. We previously demonstrated that cooperative function of these two factors in MPCs is necessary for proper specification and differentiation of pancreatic endocrine cells. In those studies, we observed a persistent decrease in expression of the β-cell maturity factor MafA...
April 1, 2018: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29329447/congenital-hyperinsulinism-and-hypopituitarism-attributable-to-a-mutation-in-foxa2
#18
Mary Ellen Vajravelu, Jinghua Chai, Bryan Krock, Samuel Baker, David Langdon, Craig Alter, Diva D De León
Context: Persistent hypoglycemia in the newborn period most commonly occurs as a result of hyperinsulinism. The phenotype of hypoketotic hypoglycemia can also result from pituitary hormone deficiencies, including growth hormone and adrenocorticotropic hormone deficiency. Forkhead box A2 (Foxa2) is a transcription factor shown in mouse models to influence insulin secretion by pancreatic β cells. In addition, Foxa2 is involved in regulation of pituitary development, and deletions of FOXA2 have been linked to panhypopituitarism...
March 1, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29329106/genetic-mutations-associated-with-neonatal-diabetes-mellitus-in-omani-patients
#19
Aisha Al Senani, Nishath Hamza, Hanan Al Azkawi, Manal Al Kharusi, Nashat Al Sukaiti, Maryam Al Badi, Moza Al Yahyai, Matthew Johnson, Elisa De Franco, Sarah Flanagan, Andrew Hattersley, Sian Ellard, Waad-Allah Mula-Abed
BACKGROUND: Neonatal diabetes mellitus (NDM) is a rare disorder worldwide where diabetes is diagnosed in the first 6 months of life. However, Oman has a relatively high incidence of NDM. METHODS: In this study, we investigated the genetic etiologies underlying NDM and their prevalence in Oman. We collected a cohort of 24 NDM patients, with and without genetic diagnosis, referred to our center from 2007 to 2015. All patients without a genetic diagnosis were tested for mutations in 23 NDM-associated genes using a custom-targeted next-generation sequencing (NGS) panel and methylation analysis of the 6q24 locus...
January 26, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/29280746/congenital-hyperinsulinism-diagnosis-and-treatment-update
#20
Hüseyin Demirbilek, Khalid Hussain
Pancreatic β-cells are finely tuned to secrete insulin so that plasma glucose levels are maintained within a narrow physiological range (3.5-5.5 mmol/L). Hyperinsulinaemic hypoglycaemia (HH) is the inappropriate secretion of insulin in the presence of low plasma glucose levels and leads to severe and persistent hypoglycaemia in neonates and children. Mutations in 12 different key genes (ABCC8, KCNJ11, GLUD1, GCK, HADH, SLC16A1, UCP2, HNF4A, HNF1A, HK1, PGM1 and PMM2) that are involved in the regulation of insulin secretion from pancreatic β-cells have been described to be responsible for the underlying molecular mechanisms leading to congenital HH...
December 30, 2017: Journal of Clinical Research in Pediatric Endocrinology
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