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Pinheiro FC, Sperb-Ludwig F, Schwartz IVD. Epidemiological aspects of hereditary fructose intolerance: A database study. Hum Mutat 2021; 42:1548-1566. [PMID: 34524712 DOI: 10.1002/humu.24282] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 09/05/2021] [Accepted: 09/11/2021] [Indexed: 12/11/2022]
Abstract
Hereditary fructose intolerance (HFI) is an inborn error of fructose metabolism of autosomal recessive inheritance caused by pathogenic variants in the ALDOB gene that lead to aldolase B deficiency in the liver, kidneys, and intestine. Patients manifest symptoms, such as ketotic hypoglycemia, vomiting, nausea, in addition to hepatomegaly and other liver and kidney dysfunctions. The treatment consists of a fructose-restricted diet, which results in a good prognosis. To analyze the distribution of ALDOB variants described in patients and to estimate the prevalence of HFI based on carrier frequency in the gnomAD database, a systematic review was conducted to assess ALDOB gene variants among patients with HFI. The prevalence of HFI was estimated from the carrier frequency of variants described in patients, as well as rare variants predicted as pathogenic by in silico tools. The p.(Ala150Pro) and p.(Ala175Asp) variants are the most frequent and are distributed worldwide. However, these variants have particular distribution patterns in Europe. The analysis of the prevalence of HFI showed that the inclusion of rare alleles predicted as pathogenic is a more informative approach for populations with few patients. The data show that HFI has a wide distribution and an estimated prevalence of ~1:10,000.
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Affiliation(s)
- Franciele C Pinheiro
- Post-Graduate Program in Genetics and Molecular Biology, Federal University of do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,BRAIN Laboratory, Center of Experimental Research, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.,Federal University of Pampa, Itaqui, Rio Grande do Sul, Brazil
| | - Fernanda Sperb-Ludwig
- Post-Graduate Program in Genetics and Molecular Biology, Federal University of do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,BRAIN Laboratory, Center of Experimental Research, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Ida V D Schwartz
- Post-Graduate Program in Genetics and Molecular Biology, Federal University of do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,BRAIN Laboratory, Center of Experimental Research, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.,Department of Genetics, Bioscience Institute, Federal University of do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
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Valadares ER, Cruz AFD, Adelino TER, Kanufre VDC, Ribeiro MDC, Penido MGMG, Peret Filho LA, Valadares LMSVE. Hereditary fructose intolerance in Brazilian patients. Mol Genet Metab Rep 2016; 4:35-8. [PMID: 26937407 PMCID: PMC4750570 DOI: 10.1016/j.ymgmr.2015.05.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/31/2015] [Accepted: 05/31/2015] [Indexed: 11/27/2022] Open
Affiliation(s)
- Eugênia Ribeiro Valadares
- Ambulatório de Erros Inatos do Metabolismo do Hospital das Clínicas da Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil; Laboratório de Erros Inatos do Metabolismo do Hospital das Clínicas da UFMG, Belo Horizonte, Brazil; Departamento de Propedêutica Complementar da Faculdade de Medicina da UFMG, Belo Horizonte, Brazil
| | - Ana Facury da Cruz
- Ambulatório de Erros Inatos do Metabolismo do Hospital das Clínicas da Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | | | - Viviane de Cássia Kanufre
- Ambulatório de Erros Inatos do Metabolismo do Hospital das Clínicas da Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Fiocchi A, Dionisi-Vici C, Cotugno G, Koch P, Dahdah L. Fruit-induced FPIES masquerading as hereditary fructose intolerance. Pediatrics 2014; 134:e602-5. [PMID: 25002667 DOI: 10.1542/peds.2013-2623] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Hereditary fructose intolerance (HFI) symptoms develop at first introduction of fruit during weaning. We report on an infant with suspected HFI who presented with repeated episodes of vomiting and hypotension after ingestion of fruit-containing meals. The first episode occurred at age 4 months. Despite negative genetic testing for HFI, strict avoidance of fruit ingestion resulted in lack of recurrence of symptoms. Oral-fructose-tolerance testing conducted with an apple mousse did not determine hypoglycemia or fructosuria but caused severe hypotension. Allergy evaluations were negative, and the history was diagnostic for fruit-induced food protein-induced enterocolitis syndrome. Because this non-immunoglobulin E-mediated gastrointestinal food hypersensitivity manifests as profuse, repetitive vomiting, often with diarrhea, leading to acute dehydration and lethargy, it may be misinterpreted as HFI. We advise pediatricians to consider food protein-induced enterocolitis syndrome in the differential diagnosis when there is a suspicion of HFI.
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Integration of PCR-Sequencing Analysis with Multiplex Ligation-Dependent Probe Amplification for Diagnosis of Hereditary Fructose Intolerance. JIMD Rep 2012; 6:31-7. [PMID: 23430936 PMCID: PMC3565637 DOI: 10.1007/8904_2012_125] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 12/29/2011] [Accepted: 12/30/2011] [Indexed: 02/01/2023] Open
Abstract
Mutations in the ALDOB gene impair the activity of the hepatic aldolase B enzyme, causing hereditary fructose intolerance (HFI), an inherited autosomic recessive disease of carbohydrate metabolism, that can result in hypoglycemia, liver and kidney failure, coma, and death. Noninvasive diagnosis is possible by identifying mutant ALDOB alleles in suspected patients. We report the genetic characterization of a cohort of 18 HFI Caucasian patients, based on PCR-sequencing and Multiplex Ligation-dependent Probe Amplification (MLPA), with the identification of two novel genetic lesions: a small duplication c.940_941dupT (p.Trp314fsX22) and a large deletion encompassing the promoter region and exon 1. MLPA and long range-PCR (LR-PCR) also identified the recently reported g.7840_14288del6448 allele with a surprisingly high frequency (11%) within our patients' cohort. The most common p.Ala150Pro (44%), p.Ala175Asp (19%), p.Asn335Lys (8%), and/or the known c.360-363del4 (5%), p.Tyr204X (2.8%), IVS6 -2A>G (2.8%) mutant alleles were identified in 14 patients at a homozygous or compound-heterozygous level. The integration of PCR-sequencing analysis with exon-dosage tools [MLPA and quantitative fluorescent multiplex-PCR (QFM-PCR)] led to the full genotyping of patients within our cohort and to the identification of the new deletion encompassing the promoter region and exon 1.
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Coffee EM, Yerkes L, Ewen EP, Zee T, Tolan DR. Increased prevalence of mutant null alleles that cause hereditary fructose intolerance in the American population. J Inherit Metab Dis 2010; 33:33-42. [PMID: 20033295 PMCID: PMC2954661 DOI: 10.1007/s10545-009-9008-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2009] [Revised: 10/08/2009] [Accepted: 10/15/2009] [Indexed: 01/25/2023]
Abstract
Mutations in the aldolase B gene (ALDOB) impairing enzyme activity toward fructose-1-phosphate cleavage cause hereditary fructose intolerance (HFI). Diagnosis of the disease is possible by identifying known mutant ALDOB alleles in suspected patients; however, the frequencies of mutant alleles can differ by population. Here, 153 American HFI patients with 268 independent alleles were analyzed to identify the prevalence of seven known HFI-causing alleles (A149P, A174D, N334K, Delta4E4, R59Op, A337V, and L256P) in this population. Allele-specific oligonucleotide hybridization analysis was performed on polymerase chain reaction (PCR)-amplified genomic DNA from these patients. In the American population, the missense mutations A149P and A174D are the two most common alleles, with frequencies of 44% and 9%, respectively. In addition, the nonsense mutations Delta4E4 and R59Op are the next most common alleles, with each having a frequency of 4%. Together, the frequencies of all seven alleles make up 65% of HFI-causing alleles in this population. Worldwide, these same alleles make up 82% of HFI-causing mutations. This difference indicates that screening for common HFI alleles is more difficult in the American population. Nevertheless, a genetic screen for diagnosing HFI in America can be improved by including all seven alleles studied here. Lastly, identification of HFI patients presenting with classic symptoms and who have homozygous null genotypes indicates that aldolase B is not required for proper development or metabolic maintenance.
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Affiliation(s)
- Erin M. Coffee
- Biology Department, Boston University, 5 Cummington Street, Boston, MA 02215, USA
| | - Laura Yerkes
- Biochemistry and Molecular Biology Program, Boston University, Boston, MA 02215, USA
| | - Elizabeth P. Ewen
- Biology Department, Boston University, 5 Cummington Street, Boston, MA 02215, USA
| | - Tiffany Zee
- Biochemistry and Molecular Biology Program, Boston University, Boston, MA 02215, USA
| | - Dean R. Tolan
- Biology Department, Boston University, 5 Cummington Street, Boston, MA 02215, USA, Biochemistry and Molecular Biology Program, Boston University, Boston, MA 02215, USA
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Different genotypes in a large Italian family with recurrent hereditary fructose intolerance. Eur J Gastroenterol Hepatol 2008; 20:118-21. [PMID: 18188031 DOI: 10.1097/meg.0b013e3282f172e6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVES Hereditary fructose intolerance is caused by a deficiency of the aldolase B enzyme, which is expressed in the liver, small intestine and kidneys. Patients usually show a marked aversion to fruits and sweets; if, however, it is not diagnosed, persistent or incidental ingestion of fructose might be lethal. Our paper aims at improving the clinical and molecular characterizations of these patients, to avoid dangerous misdiagnoses. METHODS Here we report the molecular results in an Italian cohort: on the occurrence of aldolase B mutations and, in particular, on the clinical and molecular characterization of a large family with recurrent hereditary fructose intolerance. RESULTS Patients included in our cohort showed the three most common mutations (p.A150P, p.A175D and p.N335K). Such molecular tests were enough to cover all the mutated alleles of hereditary fructose intolerance found in our patients. The allele frequencies of hereditary fructose intolerance mutations detected were 69.2% for p.A150P, 23.1% for p.A175D and 7.7% for p.N335K. The proband of the family with recurrence of the disease was heterozygous for the known p.A150P and p.A175D mutated alleles of the aldolase B gene. Molecular characterization of at-risk family members also identified the p.N335K mutation. In addition, the oldest affected patients exhibited mild clinical impairment. CONCLUSIONS Our results indicate that the diagnosis of hereditary fructose intolerance can be complicated by clinical and genetic intrafamilial variability. A knowledge of the clinical and geographical history of each family member is thus essential, to reduce potentially lethal misdiagnoses and to facilitate such patients to receive appropriate genetic counselling.
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Kriegshäuser G, Halsall D, Rauscher B, Oberkanins C. Semi-automated, reverse-hybridization detection of multiple mutations causing hereditary fructose intolerance. Mol Cell Probes 2007; 21:226-8. [PMID: 17292585 DOI: 10.1016/j.mcp.2007.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2006] [Revised: 12/25/2006] [Accepted: 01/02/2007] [Indexed: 10/23/2022]
Abstract
Hereditary fructose intolerance (HFI) is a potentially fatal nutritional disease that is caused by mutations in the liver isoenzyme of fructoaldolase (aldolase B). Our aim was to evaluate a diagnostic assay capable of simultaneously analyzing three-point mutations and a small deletion in the aldolase B (ALDOB) gene. The test under investigation is based on multiplex DNA amplification and hybridization to membrane strips presenting a parallel array of allele-specific oligonucleotide probes. We used the novel reverse-hybridization (RH) protocol to analyze 54 individuals previously genotyped by direct sequencing. RH genotyping for ALDOB mutations Delta4E4, A149P, A174D, and N334K was in complete concordance with results obtained by DNA sequencing. The procedure is rapid (<6h) and may be automated to a large extent. The RH assay tested in this study represents an accurate and robust screening tool to identify common ALDOB mutations.
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Affiliation(s)
- Gernot Kriegshäuser
- ViennaLab Diagnostics GmbH, Gaudenzdorfer Gürtel 43-45, A-1120 Vienna, Austria.
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Costa C, Costa JM, Deleuze JF, Legrand A, Hadchouel M, Baussan C. Simple, Rapid Nonradioactive Method to Detect the Three Most Prevalent Hereditary Fructose Intolerance Mutations. Clin Chem 1998. [DOI: 10.1093/clinchem/44.5.1041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Catherine Costa
- Laboratoire de Biochimie 1, Hôpital de Bicêtre, AP-HP 78 avenue du Général Leclerc, Le Kremlin Bicêtre; Laboratoire de Biologie Moléculaire, Hôpital Americain de Paris; U 347 INSERM IFR 21, Département de Pédiatrie, CHU de Bicêtre, France
| | - Jean Marc Costa
- Laboratoire de Biochimie 1, Hôpital de Bicêtre, AP-HP 78 avenue du Général Leclerc, Le Kremlin Bicêtre; Laboratoire de Biologie Moléculaire, Hôpital Americain de Paris; U 347 INSERM IFR 21, Département de Pédiatrie, CHU de Bicêtre, France
| | - Jean-François Deleuze
- Laboratoire de Biochimie 1, Hôpital de Bicêtre, AP-HP 78 avenue du Général Leclerc, Le Kremlin Bicêtre; Laboratoire de Biologie Moléculaire, Hôpital Americain de Paris; U 347 INSERM IFR 21, Département de Pédiatrie, CHU de Bicêtre, France
| | - Alain Legrand
- Laboratoire de Biochimie 1, Hôpital de Bicêtre, AP-HP 78 avenue du Général Leclerc, Le Kremlin Bicêtre; Laboratoire de Biologie Moléculaire, Hôpital Americain de Paris; U 347 INSERM IFR 21, Département de Pédiatrie, CHU de Bicêtre, France
| | - Michelle Hadchouel
- Laboratoire de Biochimie 1, Hôpital de Bicêtre, AP-HP 78 avenue du Général Leclerc, Le Kremlin Bicêtre; Laboratoire de Biologie Moléculaire, Hôpital Americain de Paris; U 347 INSERM IFR 21, Département de Pédiatrie, CHU de Bicêtre, France
| | - Christiane Baussan
- Laboratoire de Biochimie 1, Hôpital de Bicêtre, AP-HP 78 avenue du Général Leclerc, Le Kremlin Bicêtre; Laboratoire de Biologie Moléculaire, Hôpital Americain de Paris; U 347 INSERM IFR 21, Département de Pédiatrie, CHU de Bicêtre, France
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Abstract
Hereditary fructose intolerance (HFI, OMIM 22960), caused by catalytic deficiency of aldolase B (fructose-1,6-bisphosphate aldolase, EC 4.1.2.13), is a recessively inherited condition in which affected homozygotes develop hypoglycaemic and severe abdominal symptoms after taking foods containing fructose and cognate sugars. Continued ingestion of noxious sugars leads to hepatic and renal injury and growth retardation; parenteral administration of fructose or sorbitol may be fatal. Direct detection of a few mutations in the human aldolase B gene on chromosome 9q facilitates the genetic diagnosis of HFI in many symptomatic patients. The severity of the disease phenotype appears to be independent of the nature of the aldolase B gene mutations so far identified. It appears that hitherto there has been little, if any, selection against mutant aldolase B alleles in the population: in the UK, approximately 1.3% of neonates harbour one copy of the prevalent A149P disease allele. The ascendance of sugar as a major dietary nutrient, especially in western societies, may account for the increasing recognition of HFI as a nutritional disease and has shown the prevalence of mutant aldolase B genes in the general population. The severity of clinical expression correlates well with the immediate nutritional environment, age, culture, and eating habits of affected subjects. Here we review the biochemical, genetic, and molecular basis of human aldolase B deficiency in HFI, a disorder which responds to dietary therapy and in which the principal manifestations of disease are thus preventable.
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Affiliation(s)
- M Ali
- University of Cambridge, Department of Medicine, Addenbrooke's Hospital, UK
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Santamaria R, Tamasi S, Del Piano G, Sebastio G, Andria G, Borrone C, Faldella G, Izzo P, Salvatore F. Molecular basis of hereditary fructose intolerance in Italy: identification of two novel mutations in the aldolase B gene. J Med Genet 1996; 33:786-8. [PMID: 8880583 PMCID: PMC1050737 DOI: 10.1136/jmg.33.9.786] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We screened the aldolase B gene in 14 unrelated Italian patients with hereditary fructose intolerance (HFI), and found two novel disease related mutations: a single nucleotide deletion in exon 2 (delta A20) that leads to an early stop codon, and a C-->T transition in exon 8 that substitutes an Arg with a Trp residue at codon 303 (R303W).
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Affiliation(s)
- R Santamaria
- Dipartimento di Biochimica e Biotecnologie Mediche, CEINGE-Biotecnologie Avanzate, Medical School Università di Napoli Federico II, Italy
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Tolan DR. Molecular basis of hereditary fructose intolerance: mutations and polymorphisms in the human aldolase B gene. Hum Mutat 1995; 6:210-8. [PMID: 8535439 DOI: 10.1002/humu.1380060303] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Mutations in the human aldolase B gene that result in hereditary fructose intolerance have been characterized extensively. Although the majority of subjects have been from northern Europe, subjects from other geographical regions and ethnic groups have been identified. At present 21 mutations have been reported; 15 of these are single base substitutions, resulting in nine amino acid replacements, four nonsense codons, and two putative splicing defects. Two large deletions, two four-base deletions, a single-base deletion, and a seven-base deletion/one-base insertion have been found. This last mutation leads to a defect in splicing and it is likely that one of the small deletions does as well. Regions of the enzyme where mutations have been observed recurrently are encoded by exons 5 and 9. Indeed, the three most common mutations are found in these exons. Two of these prevalent HFI mutations arose from a common ancestor and spread throughout the population by genetic drift. This finding was based on linkage to two sequence polymorphisms, which are among very few informative polymorphic markers that have been identified within the aldolase B gene. Because of the prevalence of a few HFI alleles, and the recent advances in molecular methods for identifying and screening for mutation, the diagnosis of HFI by molecular screening methods should become routine. These molecular diagnostic methods will be extremely beneficial for this often difficult to diagnose and sometimes fatal disease.
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Affiliation(s)
- D R Tolan
- Biology Department, Boston University, Massachusetts 02215, USA
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Santamaria R, Scarano MI, Esposito G, Chiandetti L, Izzo P, Salvatore F. The molecular basis of hereditary fructose intolerance in Italian children. EUROPEAN JOURNAL OF CLINICAL CHEMISTRY AND CLINICAL BIOCHEMISTRY : JOURNAL OF THE FORUM OF EUROPEAN CLINICAL CHEMISTRY SOCIETIES 1993; 31:675-8. [PMID: 8292669 DOI: 10.1515/cclm.1993.31.10.675] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We investigated the molecular defects of the aldolase B gene in five unrelated patients affected by hereditary fructose intolerance. The techniques used were DNA amplification, direct sequencing and allele-specific oligonucleotide (ASO) hybridization. The most frequent substitutions found in the hereditary fructose intolerance alleles analysed were the A174D and the A149P mutations, which account for 50% and 30% of the alleles, respectively. In two unrelated families, we found a rare mutation, the MD delta 4 previously described only in one British family, which may be an important cause of the disease in Italy.
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Affiliation(s)
- R Santamaria
- Dipartimento di Biochimica e Biotecnologie Mediche, Facoltà di Medicina e Chirurgia, Università di Napoli Federico II, Italy
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Brooks CC, Tolan DR. Association of the widespread A149P hereditary fructose intolerance mutation with newly identified sequence polymorphisms in the aldolase B gene. Am J Hum Genet 1993; 52:835-40. [PMID: 8096362 PMCID: PMC1682077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Hereditary fructose intolerance (HFI) is a potentially fatal autosomal recessive disease resulting from the catalytic deficiency of fructose 1-phosphate aldolase (aldolase B) in fructose-metabolizing tissues. The A149P mutation in exon 5 of the aldolase B gene, located on chromosome 9q21.3-q22.2, is widespread and the most common HFI mutation, accounting for 57% of HFI chromosomes. The possible origin of this mutation was studied by linkage to polymorphisms within the aldolase B gene. DNA fragments of the aldolase B gene containing the polymorphic marker loci from HFI patients homozygous for the A149P allele were amplified by PCR. Absolute linkage to a common PvuII RFLP allele was observed in 10 A149P homozygotes. In a more informative study, highly heterozygous polymorphisms were detected by direct sequence determination of a PCR-amplified aldolase B gene fragment. Two two-allele, single-base-pair polymorphisms, themselves in absolute linkage disequilibrium, in intron 8 (C at nucleotide 84 and A at nucleotide 105, or T at 84 and G at 105) of the aldolase B gene were identified. Mendelian segregation of these polymorphisms was confirmed in three families. Allele-specific oligonucleotide (ASO) hybridizations with probes for both sequence polymorphisms showed that 47% of 32 unrelated individuals were heterozygous at these loci; the calculated PIC value was .37. Finally, ASO hybridizations of PCR-amplified DNA from 15 HFI patients homozygous for the A149P allele with probes for these sequence polymorphisms revealed absolute linkage disequilibrium between the A149P mutation and the 84T/105G allele. These results are consistent with a single origin of the A149P allele and subsequent spread by genetic drift.
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Affiliation(s)
- C C Brooks
- Department of Biology, Boston University, MA 02215
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Tolan DR, Brooks CC. Molecular analysis of common aldolase B alleles for hereditary fructose intolerance in North Americans. BIOCHEMICAL MEDICINE AND METABOLIC BIOLOGY 1992; 48:19-25. [PMID: 1524867 DOI: 10.1016/0885-4505(92)90043-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The diagnosis of hereditary fructose intolerance (HFI) presents a difficult challenge that often involves procedures of high risk to the patient. A relatively noninvasive method that involves molecular analysis of common alleles would offer a decided advantage. The molecular defects in the aldolase B gene were studied in 31 HFI subjects (23 pedigrees, 47 apparently independent alleles) from the United States and Canada. We screened for the three most common European alleles by direct hybridization of allele-specific oligodeoxyribonucleotides (ASOs) to portions of the aldolase B gene that were amplified by PCR. Fifty-five percent of mutant North American alleles were A149P (ala149----pro), the most common mutation in the European population. The other two alleles, A174D (ala174----asp) and N334K (asn334----lys), represent 11 and 2% of North American alleles, respectively. Nine patients, representing 32% of independent alleles studied, had an HFI allele that was not of this common missense class. This North American allele distribution is significantly different from that in Europe, where 13% of HFI alleles are not of this type. Preliminary screening of amplified DNA with this set of ASOs indicated that 80% of symptomatic HFI patients can be identified in the American population by this simple genetic test.
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Affiliation(s)
- D R Tolan
- Biology Department, Boston University, Massachusetts 02215
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