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Seven New Cases of Hemoglobin Camperdown α2β2104(G6)Arp→Ser Found in Malta, Sicily and Tunisia. Hemoglobin 2009. [DOI: 10.3109/03630268408991746] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Tozetto-Mendoza TR, Ferreira PRS, Viviani NM, Albuquerque DM, Rizzi I, Araújo JTD. Camperdown hemoglobin associated with beta° thalassemia in a Brazilian child. Genet Mol Biol 2005. [DOI: 10.1590/s1415-47572005000300010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Castelli R, Tempesta A, Bianchi A, Porro T, Ivaldi G, Cappellini MD. Unreliable estimation of HbA due to the presence of Camperdown haemoglobin [beta 104 (G6) Arg --> Ser]. Diabet Med 2004; 21:377-9. [PMID: 15049942 DOI: 10.1111/j.1464-5491.2004.1098.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To suggest the possible unreliability of HbA(1c) determination in presence of haemoglobin variants during routine metabolic evaluation. METHODS We present a case of Camperdown haemoglobin, accidentally detected in a middle-aged Italian man during routine metabolic evaluation for newly diagnosed diabetes. The haemoglobin variant has been identified by exchange high performance liquid chromatography (CE-HPLC) (VARIANT trade mark HbA(1c) Program, Bio-Rad Laboratories, Hercules, CA, USA), and characterized at molecular level by direct sequencing. RESULTS A 56-year-old male of Northern Italian origin, presented to our centre for a Type 2 diabetes mellitus of recent diagnosis. HbA(1c) determination was routinely determinated. The patient's chromatogram showed an inappropriate peak of 38.5% in the HbA(1c) position suggestive for the presence of abnormal haemoglobin. Further evaluation identified an abnormal haemoglobin peak even higher (49.5%) eluting at 1.34 minutes in P2-window. Molecular characterization of the mutation showed a nucleotide replacement, AGG --> AGC at codon 104, causing the amino acid replacement Arg --> Ser at position 104 (G6) that give rise to Hb Camperdown. CONCLUSIONS Haemoglobinopathies can lead to inaccurate glycated haemoglobin level determination. In patients carrying haemoglobin variants, the different methods for determinations of glycated haemoglobin could result in different errors, showing either higher or lower values than expected.
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Affiliation(s)
- R Castelli
- U. O. di Medicina d'Urgenza e Pronto Soccorso Ospedale Maggiore Policlinico IRCCS, Milan, Italy.
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De Angioletti M, Lacerra G, Gaudiano C, Mastrolonardo G, Pagano L, Mastrullo L, Masciandaro S, Carestia C. Epidemiology of the delta globin alleles in southern Italy shows complex molecular, genetic, and phenotypic features. Hum Mutat 2002; 20:358-67. [PMID: 12402333 DOI: 10.1002/humu.10132] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We characterized mutations and haplotypes of the delta-globin gene (HBD, MIM# 142000) in two regions of southern Italy. Mutations were discovered by screening for individuals with Hb A2<2%. In Basilicata, about 10,000 students were screened and 53 carriers in 43 unrelated families were diagnosed; in Campania, cases were referred through a routine thalassemia counseling service. Twelve alleles were detected. Four were novel variants [Hb A2-Metaponto (g.238C>A), Hb A2-Campania (g.302C>A), Hb A2-Lucania (g.393C>G), and Hb A2-Capri (g.443G>T)]. Hb A2-Lucania was not inherited but had arisen in the propositus. Two were novel mutations in the noncoding regions: the substitutions IVS2+6T>A, presumably affecting the splicing, and g.-126A>T in the GATA motif presumably affecting transcription. All novel alleles were found associated with haplotypes common in the Mediterranean area. The remaining six were alleles already described. The Hb A2-Yialousa (g.82G>T) was the most prevalent (42/63 families). Recurrent homologous crossing-over events have, most likely, linked this allele to Haplotypes IX (24 families), IV (10 families), or III (seven families). The ratio of Haplotypes IX:IV:III was about the same in the two regions. The rare allele Hb A2-NYU (g.39T>A) was found in 11 families from Basilicata associated with Haplotype I. All the 11 families lived in a restricted area extending from the Ionian Coast for 15 km along the Angri and Sinni Rivers. A founder effect most probably gave origin to this isolated group. The remaining four alleles were rare: the 7.2-kb deletion Corfù type (HBD g.-5946_1262del), Hb A2-Mitsero (g.14C>T), Hb A2-Etolia (g.385T>C), Hb A2-Coburg (g.1376G>A). Correlation between genotype and phenotype was established in 103 carriers.
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Lacan P, Drai J, Aubry M, Francina A, Orgiazzi J. A new beta-globin variant: Hb Sainte Eugénie [beta104(G6)Arg-->Trp] in a French Caucasian female. Hemoglobin 2000; 24:245-8. [PMID: 10975444 DOI: 10.3109/03630260008997532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- P Lacan
- Molecular Pathology Unit, Department of Biochemistry, Edouard Herriot Hospital, Lyon, France
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Debernardi S, De Bellis G, Mosca A, Paleari R, Luzzana M. Characterization of Hb Camperdown [beta 104(G6)Arg-->Ser] by capillary electrophoresis and automated solid phase DNA sequencing. Hemoglobin 1996; 20:155-60. [PMID: 8811320 DOI: 10.3109/03630269609027922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- S Debernardi
- Consiglio Nazionale delle Ricerche, Istituto di Tecnologie Biomediche Avanzate, Segrate (MI), Italy
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Miranda SR, Kimura EM, Teixeira RC, Bertuzzo CS, Ramalho AS, Saad ST, Costa FF. Hb Camperdown [alpha 2 beta 2 104(G6)Arg-->Ser] identified by DNA analysis in a Brazilian family. Hemoglobin 1996; 20:147-53. [PMID: 8811319 DOI: 10.3109/03630269609027921] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- S R Miranda
- Department of Clinical Medicine, State University of Campinas, SP, Brazil
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Schnedl WJ, Reisinger EC, Lipp RW, Krejs GJ, Hopmeier P. Hemoglobin variants recently detected in Austria. Ann Hematol 1995; 71:185-7. [PMID: 7578525 DOI: 10.1007/bf01910316] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Measurement of glycated hemoglobin (HbAtc) is used for routine management of diabetic patients. Glucose linkage to HbAtc reflects mean blood glucose levels during the last 3 months before examination. Various methods for HbA1c determination show abnormal values with hemoglobin variants. In some diabetic patients excessively high HbA1c values with high-performance liquid chromatography (HPLC) led to the detection of Hb Graz. In addition to Hb Graz, other silent hemoglobin variants have been found in Austria. Here we review Hb Graz, Hb Sherwood Forest, and Hb Okayama detected while using HPLC for the measurement of HbA1c in diabetic patients.
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Affiliation(s)
- W J Schnedl
- Department of Internal Medicine, Karl Franzens University, Graz, Austria
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Plaseska D, Panovska-Popovska S, Lazarevski M, Efremov GD. Hb F-Macedonia-II [G gamma 104(G6)Lys-->Asn]: a new gamma chain variant. Hemoglobin 1994; 18:373-82. [PMID: 7713741 DOI: 10.3109/03630269409045769] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In the course of our newborn screening program for the presence of hemoglobinopathies in the Republic of Macedonia, we have detected a new G gamma chain variant with a Lys-->Asn or AAG-->AAC substitution at codon 104. The variant was found in a blood sample from a healthy baby boy of Macedonian nationality. The abnormal chain was quantitated at 32.4% of the total gamma chains by reversed phase high performance liquid chromatography. The characterization of the variant was by sequence analysis of polymerase chain reaction-amplified DNA. The presence of the mutation in the mother was confirmed by Hph I restriction enzyme digestion of the polymerase chain reaction-amplified DNA fragment. Although the mutated G is the last nucleotide of exon 2 and part of the donor splice site sequence of the second intervening sequence of the G gamma gene, it appears that the splicing of the mRNA in this variant is not altered.
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Affiliation(s)
- D Plaseska
- Macedonian Academy of Sciences and Arts Research Center for Genetic Engineering and Biotechnology, Skopje, Republic of Macedonia
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Langdown JV, Davidson RJ, Williamson D. A new alpha chain variant, Hb Turriff [alpha 99(G6)Lys----Glu]: the interference of abnormal hemoglobins in Hb A1c determination. Hemoglobin 1992; 16:11-7. [PMID: 1634357 DOI: 10.3109/03630269209005671] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Hb Turriff is a new hemoglobin variant which we have identified in a diabetic individual. During the determination of Hb A1c by high performance liquid chromatography, an inappropriately elevated result was found to be due to the abnormal hemoglobin chromatographing with the Hb A1c fraction. This new hemoglobin variant, Hb Turriff [alpha 99(G6)Lys----Glu], is not associated with any hematological disturbance, and family investigations indicate that it has arisen as a de novo mutation.
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Affiliation(s)
- J V Langdown
- Department of Haematology, Addenbrooke's Hospital, Cambridge, U.K
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Jensen ON, Roepstorff P. Application of reversed phase high performance liquid chromatography and plasma desorption mass spectrometry for the characterization of a hemoglobin variant. Hemoglobin 1991; 15:497-507. [PMID: 1814857 DOI: 10.3109/03630269109027897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An abnormal hemoglobin was structurally characterized by use of reversed phase high performance liquid chromatography in combination with plasma desorption mass spectrometry for peptide identification. The study was accomplished using approximately 150 micrograms of hemoglobin and unambiguously demonstrated the variant to be beta 104(G6)Arg----Ser, known as Hb Camperdown.
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Affiliation(s)
- O N Jensen
- Department of Molecular Biology, Odense University, Denmark
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Zhao W, Wilson JB, Huisman TH, Sciarratta GV, Ivaldi G, Petrini C, Ripamonti M. Hb Camperdown or alpha 2 beta 2(104)(G6)Arg----Ser in two Italian males. Hemoglobin 1990; 14:459-61. [PMID: 2283301 DOI: 10.3109/03630269009032008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- W Zhao
- Department of Cell and Molecular Biology, Medical College of Georgia, Augusta 30912-2100
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Kister J, Barbadjian J, Blouquit Y, Bohn B, Galacteros F, Poyart C. Inhibition of oxygen-linked anion binding in Hb Camperdown [alpha 2 beta 2(104)(G6)Arg----Ser]. Hemoglobin 1989; 13:567-78. [PMID: 2606725 DOI: 10.3109/03630268908993107] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Oxygen equilibrium studies of purified Hb Camperdown [beta 104(G6) Arg----Ser] have revealed an increased oxygen affinity at acid pH, while it is decreased for pH values above 7.4. This accounts for an almost 40% reduction in the alkaline Bohr effect. The effects of chloride and organophosphate effectors on the oxygen affinity of Hb Camperdown are inhibited by 40-50%. In chloride-free Hepes buffer, Hb Camperdown exhibits a lower oxygen affinity than normal Hb A. The present results confirm the important role of the positively charged residues lining the beta 1 beta 2 interface in regulating the functional properties of hemoglobin.
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Affiliation(s)
- J Kister
- INSERM U 299, Faculté de Médecine Paris-Sud, France
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Baudin-Chich V, Wajcman H, Gombaud-Saintonge G, Arous N, Riou J, Brière J, Galacteros F. Hemoglobin Brest [beta 127 (H5)Gln----Lys] a new unstable human hemoglobin variant located at the alpha 1 beta 1 interface with specific electrophoretic behavior. Hemoglobin 1988; 12:179-88. [PMID: 3384710 DOI: 10.3109/03630268808998024] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Hb Brest [beta 127 (H5)Gln----Lys] is a new unstable variant located at the alpha 1 beta 1 interface at the same position as Hb Complutense [beta 127(H5)Gln----Glu]. In each of these, the substitution produces a distinct alteration in charge, yet both variants move with Hb A in conventional electrophoresis. This peculiar electrophoretical behavior may be due to the molecular position of the modified residue, which is deeply buried inside the tetramer.
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Baird M, Driscoll C, Schreiner H, Sciarratta GV, Sansone G, Niazi G, Ramirez F, Bank A. A nucleotide change at a splice junction in the human beta-globin gene is associated with beta 0-thalassemia. Proc Natl Acad Sci U S A 1981; 78:4218-21. [PMID: 6270663 PMCID: PMC319760 DOI: 10.1073/pnas.78.7.4218] [Citation(s) in RCA: 77] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
beta 0-Thalassemia is a heterogeneous group of disorders associated with absence of beta-globin. In a survey of DNAs from patients with beta 0-thalassemia of diverse ethnic origins, a change at the splice junction at the 5' end of the large intervening sequence (IVS 2) of the human beta-globin gene has been found in one patient of Italian and another two of Iranian ethnic origins. The enzyme Hph I recognizes a change at this site and generates a large-than-normal fragment of DNA, which hybridizes specifically to a beta-globin IVS 2 probe. No other changes in beta-globin gene DNA structure or organization are detectable by extensive restriction endonuclease analysis. The enzyme HinfI which recognizes a sequence beginning three nucleotides from the 5' end of the IVS 2 splice junction, produces normal fragments and localizes the defect to a G-G-T sequence at the 5'-end IVS 2 splice junction. This sequence is known to be remarkably conserved in all globin genes from many species and in most other genes examined to date. Thus, in at least some beta 0-thalassemia patients, the beta 0-thalassemia defect is associated with a nucleotide change at a splice junction. These patients provide unique examples of naturally occurring defects in splice junctions of eukaryotic genes associated with absence of specific gene function.
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Nute PE, Mahoney WC. Complete primary structure of the beta chain from the hemoglobin of a baboon, Papio cynocephalus. Hemoglobin 1980; 4:109-23. [PMID: 7390858 DOI: 10.3109/03630268009042379] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The complete primary structure of the beta chain from the adult hemoglobin of a baboon, Papio cynocephalus, has been determined by automated, Edman degradation of the intact chain and four fragments derived therefrom by specific cleavage reactions. The analysis was facilitated by application of a modified solvent system that permits unambiguous identification, by high-performance liquid chromatography, of the 17 amino acids whose phenylthiohydantoin derivatives are soluble in ethyl acetate. The sequence obtained differs from that of the human beta chain at eight sites, a degree of divergence similar to that observed when human and macaque beta chains are compared. Of the cercopithecoid beta chains whose complete sequences have been determined or inferred from compositions of small peptides, that of P. cynocephalus is most like the beta chain of the gelada baboon, an observation in accord with assessment of a close phylogenetic relationship between the genera Papio and Theropithecus.
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