ABCC8 p.Arg248*
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[hide] Mutation spectra of ABCC8 gene in Spanish patients... Hum Mutat. 2006 Feb;27(2):214. Fernandez-Marmiesse A, Salas A, Vega A, Fernandez-Lorenzo JR, Barreiro J, Carracedo A
Mutation spectra of ABCC8 gene in Spanish patients with Hyperinsulinism of Infancy (HI).
Hum Mutat. 2006 Feb;27(2):214., [PMID:16429405]
Abstract [show]
Hyperinsulinism of Infancy (HI) is a clinical disorder characterized by deregulation of insulin secretion that leads to profound hypoglycemia. Mutations in genes encoding the ATP-regulated potassium channels of the pancreatic beta-cell, namely ABCC8 (SUR1) and KCNJ11 (Kir6.2), are the major genetic known cause of the disease. To elucidate the genetic etiology of HI in the uncharacterized Spanish population, we conducted extensive sequencing analysis of the ABCC8 (83.5Kb) and KCNJ11 (1.7Kb) genes in 34 Spanish HI patients. Mutations in ABCC8 were detected for both alleles in 13 patients, while ten patients carried only one mutation in one of the ABCC8 alleles. We have detected 22 novel and seven previously described mutations in ABCC8, approximately 60% of them lead to a premature termination signal, which would result in truncated SUR1 proteins. No mutations were found in the KCNJ11 gene. In addition, we report for the first time a 3914bp macrodeletion associated with the HI disorder. The potential pathogenicity of several additional variants is discussed. The spatial pattern of three pathological mutations suggests possible geographical founder effects. This work reveals for first time the involvement of KATP channels in the pathogenesis of an important proportion (approximately 68%) of Spanish HI patients. The spectrum of mutations in Spanish HI patients provides an important tool for diagnosis and prognosis of HI patients in the Spanish population, as well as for genetic counseling of HI families.
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137 Clinical characteristics of HI Spanish patients that carry at least one mutation in ABCC8 Mutationsg Pa Ob Sex Mc Td PCe PTf Pchrh Mchrh 1a Gal M >p90 DZ 5 (>90%) OT, NF, GC p.R248X c.3576delG 1b Gal F >p50 DZ, OT, NF - OT, NF, NGT p.R248X c.3576delG 3 Gal F >p90 DZ 2 (95%) - c.584 585insA c.584 585insA 4 Gal M >p75 DZ 4 (95%) DZ, NGT c.584 585insA c.584 585insA 5 Gal M >p50 OT, DZ 16 (90%) - c.1347 1348delGA - 8 Cast M >p75 DZ, OT, GC - - p.M233R - 9 Cast F >p75 DZ 0.5 (85%) DZ, OT, PC (99%) p.G111R - 12 And M - - - - c.4612 -2 A>T p.D310N 14 Cat M >p75 DZ - - p.R934X c.3992-9 G>A 17 Cat F >p90 DZ, OT - - c.3133 3152del c.4619 4620insT 18 Cat M <p50 DZ, CNF 0.5 (95%) DZ c.1732 1746dup - 19 Can M <p50 DZ, NF, OT 2 (99%) - c.1332+4438 1631-9207del c.1332+4438 1631-9207del 20 Cat M - DZ, NF, GC - - c.2142delG p.T1131P 21 Cat F >p50 DZ, NF - - - i - i 23 Bal M >p90 CNF - - c.4310 G>A c.1732 1746dup 25 Mor M - DZ, OT yes (EXITUS) p.N188S, c.4123-19 C>T p.N188S, c.4123-19 C>T 27 Cast F >p75 DZ, CNF 24 (75%) PC (99%) p.R598X p.L1451P 28 Cat M >p90 DZ, CNF - - p.R1251X p.L1148R 30 Cast M >p90 DZ, OT 5 (95%) DZ, OT (EXITUS) p.R74W - 31 Gal F >p90 DZ 0.5 (95%) DZ - p.K719T 32 Cat F >p90 DZ - - - p.N1296K 33 Cast F >p75 DZ, OT 1 (95%) DZ, OT c.3291 3292delGC - 34 Val F >p90 DZ, NF - (EXITUS) p.P551R - a P = patient.
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ABCC8 p.Arg248* 16429405:137:176
status: NEWX
ABCC8 p.Arg248* 16429405:137:234
status: NEW147 Genetic variants found in ABCC8 gene from HI Spanish cohort Mutations considered pathogenic nt change a aa change a Type E/Ic Domaind Patient Refe PSIC f Polypheng C h c.220C>T p.R74W MIS E2 CL1 P30 NR 2.257 PrD Highly c.331G>C p.G111R MIS E3 TM3 P9 [1] 1.672 PsD Moderately c.563A>G p.N188S MIS E4 TM5 P25 [2] 1.494 Benign Highly c.698T>G p.M233R MIS E5 CL3 P8 NR 2.428 PrD Highly c.584_585insA p.Y195X FS E5 ─ P3, P4 NR ─ ─ ─ c.742C>T p.R248X NON E5 ─ P1a, P1b [3] ─ ─ ─ c.928G>A p.D310N MIS E6 CL3 P12 NR 1.614 PsD Highly c.1347_1348delGA p.V449VfsX493 FS E9 ─ P5 NR ─ ─ ─ c.1332+4438_1631-9207del p.I445FfsX447 FS ─ ─ P19 NR ─ ─ ─ c.1652C>G p.P551R MIS E11 TM10 P34 NR 2.1 PsD Highly c.1732_1746dup p.A578_L582dup IFins E12 ─ P18, P23 NR ─ ─ ─ c.1792C>T p.R598X NON E12 ─ P27 NR ─ ─ ─ c.2156 A>C p.K719T MIS E16 CL6 P31 NR 1.927 PsD Highly c.2142delG p.Q714QfsX724 FS E16 ─ P20 NR ─ ─ ─ c.2394-2A>G ─ AS I19 ─ P21 NR ─ ─ ─ c.2800C>T p.R934X NON E23 ─ P14 NR ─ ─ ─ c.3133_3152del p.L1045LfsX1107 FS E25 ─ P17 [6] ─ ─ ─ c.3291_3292delGC p.L1097LfsX1113 FS E26 ─ P33 NR c.3391A>C p.T1131P MIS E27 CL7 P20 NR 1.777 PsD Moderately c.3443T>G p.L1148R MIS E28 TM14 P28 NR 1.722 PsD Highly c.3576delG p.L1191LfsX1207 FS E29 ─ P1a, P1b, NR ─ ─ ─ c.3751C>T p.R1251X NON E30 ─ P28 NR ─ ─ ─ c.3888C>G p.N1296K MIS E32 TM17 P32 NR 1.924 PsD Highly c.3992-9G>A ─ AS I 32 ─ P14 [4] ─ ─ ─ c.4123-19C>T ─ AS I33 ─ P25 [5] ─ ─ ─ c.4310G>A ─ AS E35 ─ P23 [4] ─ ─ ─ c.4352T>C p.L1451P MIS E36 CL9 P27 NR 1.797 PsD Highly c.4612-2 A>T ─ AS I38 ─ P12 NR ─ ─ ─ c.4619_4620insT p.H1540AfsX1559 FS E39 ─ P17 NR ─ ─ ─ Polimorphisms and unclassified variants nt change a aa change a Type E/Ic SNPid Patientsi Controls NCBI j Exclusion c. 207T>C p.P69P SYN E2 rs1048099 28/46 ─ 0.50 S c. 330C>T p.A110A SYN E3 rs8192695 2/48 ─ 0.04 S c.
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ABCC8 p.Arg248* 16429405:147:467
status: NEW[hide] The spectrum of ABCC8 mutations in Norwegian patie... Clin Genet. 2009 May;75(5):440-8. Sandal T, Laborie LB, Brusgaard K, Eide SA, Christesen HB, Sovik O, Njolstad PR, Molven A
The spectrum of ABCC8 mutations in Norwegian patients with congenital hyperinsulinism of infancy.
Clin Genet. 2009 May;75(5):440-8., [PMID:19475716]
Abstract [show]
Potassium channels in the plasma membrane of the pancreatic beta cells are critical in maintaining glucose homeostasis by responding to ATP and coupling metabolic changes to insulin secretion. These channels consist of subunits denoted the sulfonylurea receptor SUR1 and the inwardly rectifying ion channel KIR6.2, which are encoded by the genes ABCC8 and KCNJ11, respectively. Activating mutations in the subunit genes can result in monogenic diabetes, whereas inactivating mutations are the most common cause of congenital hyperinsulinism of infancy (CHI). Twenty-six Norwegian probands with CHI were analyzed for alterations in ABCC8 and KCNJ11. Fifteen probands (58%) had mutations in the ABCC8 gene. Nine patients were homozygous or compound heterozygous for the mutations, indicating diffuse pancreatic disease. In five patients, heterozygous and paternally inherited mutations were found, suggesting focal disease. One patient had a de novo mutation likely to cause a milder, dominant form of CHI. Altogether, 16 different ABCC8 mutations (including the novel alterations W231R, C267X, IVS6-3C>G, I462V, Q917X and T1531A) were identified. The mutations IVS10+1G>T, R1493W and V21D occurred in five, three and two families, respectively. KCNJ11 mutations were not found in any patients. Based on our mutation screening, we estimate the minimum birth prevalence of ABCC8-CHI in Norway to 1:70,000 during the past decade. Our results considerably extend the knowledge of the molecular genetics behind CHI in Scandinavia.
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109 Clinical characteristics of Norwegian CHI patients carrying mutations in ABCC8 Proband Sex Birth weight (g)/gestation length (weeks)a Treatment Mutationsd Medicalb Surgeryc Maternal chromosome Paternal chromosome Hypo-N3 F 6190/38 Deceased Yes (S) R1493W R1493W Hypo-N6 M 5340/38 Somatostatin, diet (FM, PEG) No V21D V21D Hypo-N8 F 5740/37 Insulin Yes (S) G1400R R1493W Hypo-N9 F 5130/40 Diet (FM) Yes (S) - IVS1011G.T Hypo-N11 M 4000/38 None No - G1478Re Hypo-N14 M 5000/40 Somatostatin, diet (FM, PEG) No - IVS1011G.T Hypo-N16 F 3780/38 Diet (FM) No - C267X Hypo-N19 F 5240/40 Somatostatin, diet (FM, PEG) No IVS1011G.T T1531Af Hypo-N22 M 4500/39 Diazoxide Yes (S) IVS6-3C.G, I462V Q917X Hypo-N23 F 4860/38 Insulin Yes (S) P1413Lg IVS1011G.Tg Hypo-N25 M 3910/34 Insulin Yes (S) V21Dg E490Xg Hypo-N26 M 3790/35 Diet (FM, PEG) Yes (H) V187D R248X Hypo-N29 F 3350/37 None Yes (P) - IVS1011G.T Hypo-N30 F 3800/37 Diazoxide No W231R L503P Hypo-N31 M 4340/40 None Yes (P) - R1493W a All cases had birth weights 12 standard deviation scores except for Hypo-N29 whose score was 11. b Current therapy is given.
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ABCC8 p.Arg248* 19475716:109:841
status: NEW133 ABCC8 mutations found in Norwegian CHI patientsa Nucleotide change Location Amino acid change Mutation type PSIC score PD Number of families Reference c.62 T.A Exon 1 V21D Mis 1.96 PoD 2 (24) c.560 T.A Exon 4 V187D Mis 2.01 PrD 1 (2) c.691 T.C Exon 5 W231R Mis 4.03 PrD 1 NR c.742 C.T Exon 5 R248X Non - - 1 (34, 42) c.801 C.A Exon 5 C267X Non - - 1 NR IVS6-3C.G Intron 6 - AS - - 1 NR c.1384 A.G Exon 9 I462V Mis 0.62 PrB 1 NR c.1468 G.T Exon 10 E490X Non - - 1 (43) c.1508 T.C Exon 10 L503P Mis 2.36 PrD 1 (24) IVS1011G.T Intron 10 - AS - - 5 (44) c.2749 C.T Exon 23 Q917X Non - - 1 NR c.4198 G.A Exon 35 G1400R Mis 2.37 PrD 1 (42) c.4238 C.T Exon 35 P1413L Mis 2.76 PrD 1 (25) c.4432 G.A Exon 37 G1478R Mis 2.37 PrD 1 (14, 31) c.4477 C.T Exon 37 R1493W Mis 2.79 PrD 3 (26) c.4591 A.G Exon 38 T1531A Mis 1.93 PoD 1 NR AS, aberrant splicing; Mis, missense; NR, not previously reported; Non, nonsense; PD, pathogenic description; PoD, possibly damaging; PrB, predicted to be benign; PrD, probably damaging; PSIC, position-specific independent counts.
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ABCC8 p.Arg248* 19475716:133:292
status: NEW168 A largenumber (.150)ofABCC8 alterations have been reported to cause CHI (19) including 10 of the mutations observed in this study (V21D, V187D, R248X, E490X, L503P, IVS1011G.T, G1400R, P1413L, G1478R, and R1493W).
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ABCC8 p.Arg248* 19475716:168:144
status: NEW