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Identification of the Potential Molecular Mechanisms Linking RUNX1 Activity with Nonalcoholic Fatty Liver Disease, by Means of Systems Biology. Biomedicines 2022; 10:biomedicines10061315. [PMID: 35740337 PMCID: PMC9219880 DOI: 10.3390/biomedicines10061315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/24/2022] [Accepted: 06/01/2022] [Indexed: 12/10/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent chronic hepatic disease; nevertheless, no definitive diagnostic method exists yet, apart from invasive liver biopsy, and nor is there a specific approved treatment. Runt-related transcription factor 1 (RUNX1) plays a major role in angiogenesis and inflammation; however, its link with NAFLD is unclear as controversial results have been reported. Thus, the objective of this work was to determine the proteins involved in the molecular mechanisms between RUNX1 and NAFLD, by means of systems biology. First, a mathematical model that simulates NAFLD pathophysiology was generated by analyzing Anaxomics databases and reviewing available scientific literature. Artificial neural networks established NAFLD pathophysiological processes functionally related to RUNX1: hepatic insulin resistance, lipotoxicity, and hepatic injury-liver fibrosis. Our study indicated that RUNX1 might have a high relationship with hepatic injury-liver fibrosis, and a medium relationship with lipotoxicity and insulin resistance motives. Additionally, we found five RUNX1-regulated proteins with a direct involvement in NAFLD motives, which were NFκB1, NFκB2, TNF, ADIPOQ, and IL-6. In conclusion, we suggested a relationship between RUNX1 and NAFLD since RUNX1 seems to regulate NAFLD molecular pathways, posing it as a potential therapeutic target of NAFLD, although more studies in this field are needed.
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Abdulqader AMR, Rachid S, Mohammed AI, Mahmood SN. Application of Indirect Linkage Analysis for Carrier Detection of Hemophilia A in Kurdistan Region of Iraq: Usefulness of Intron 18 BclI T>A, Intron 19 HindIII C>T, and IVS7 nt27 G>A Markers. Clin Appl Thromb Hemost 2019; 25:1076029619854545. [PMID: 31179744 PMCID: PMC6714943 DOI: 10.1177/1076029619854545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hemophilia A (HA) is the most common congenital X-linked coagulopathy caused by mutations in the factor VIII gene. One in 5000 to 10 000 male persons worldwide suffer from HA. It is the archetype of high-cost, low-volume disease. Therefore, identification of carriers is crucial to avoid the birth of affected males. Tracking of the defective X chromosome through indirect linkage analysis represents the most practical method for screening for carriers in developing countries. In this study, 227 individuals from 41 families with HA and 100 normal participants were recruited from the Kurdistan region of Iraq and evaluated for intron 18 BclI, intron 19 HindIII, and IVS7 nt 27 markers by polymerase chain reaction restriction fragment length polymorphism and direct sequencing. Among the studied women, 49%, 42%, and 14% were discovered to be heterozygous for BclI, HindIII, and IVS7 markers, respectively. Using BclI, HindIII, and IVS7 markers, 56%, 46%, and 17% of the families were informative, respectively. The combined informativity of these polymorphic sites reaches 66%. The current study illustrates the effectiveness of the BclI and HindIII markers for the diagnosis of HA carriers among the Iraqi Kurdish population.
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Affiliation(s)
| | - Shwan Rachid
- 2 Department of Applied Science, Charmo University, Chamchamal, Sulaymaniyah, Iraq
| | - Ali Ibrahim Mohammed
- 1 Department of Pathology, College of Medicine, University of Sulaymaniyah, Sulaymaniyah, Iraq
| | - Sarwar Noori Mahmood
- 3 Department of Surgery, College of Medicine, University of Sulaymaniyah, Sulaymaniyah, Iraq
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Tu TC, Liou WS, Chou TY, Lin TK, Lee CF, Chen JD, Cham TM, Chung MI. Prevalence, incidence, and factor concentrate usage trends of hemophiliacs in Taiwan. Yonsei Med J 2013; 54:71-80. [PMID: 23225801 PMCID: PMC3521284 DOI: 10.3349/ymj.2013.54.1.71] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Hemophilia A and B (HA, HB) are the most common X-linked inherited bleeding disorders. The introduction of factor concentrates has allowed for control of the lifelong chronic disease. However, no studies have been published regarding the epidemiology of hemophilia in Taiwan. Our aim was to determine the prevalence, incidence, and mortality rate, as well as trends in the use of factor concentrates, in individuals with hemophilia in Taiwan. MATERIALS AND METHODS A retrospective study was conducted using the National Health Insurance Research Database between 1997 and 2007. RESULTS We identified 988 males with hemophilia (HA : HB ratio=5.4 : 1). The mean prevalence per 100000 males was 6.7 ± 0.1 for HA and 1.2 ± 0.1 for HB. The estimated mean annual incidence per live male birth was 1 in 10752 for HA and 1 in 47619 for HB. Standardized mortality ratios for males with hemophilia (all severities) or severe hemophilia were 1.3- and 2.1-fold higher than that of the general male population, respectively. Mean factor VIII (FVIII) and factor IX (FIX) usage was 1.5003 ± 0.4029 and 0.3126 ± 0.0904 international units (IUs) per capita, respectively. Mean FVIII and FIX usage per patient with hemophilia (all severities) or severe hemophilia was 44027 ± 11532 and 72341 ± 17298, respectively, and 49407 ± 13015 and 74369 ± 18411 IUs per person with HA or HB, respectively. CONCLUSION Our data revealed epidemiologic and factor concentrate usage trends in males with hemophilia in Taiwan, highlighting a need for improvements in the mandatory National Health Insurance registry. A better- designed, patient-centered registry system would enable more detailed patient information collection and analysis, improving subsequent care.
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Affiliation(s)
- Tsu-Chiang Tu
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Wen-Shyong Liou
- Department of Pharmacy, Taichung Veterans General Hospital, Taichung, Taiwan
- College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Tsui-Yun Chou
- The Hemophilia Care and Research Center, Tri-Service General Hospital, Taipei, Taiwan
| | - Tsung-Kun Lin
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Chuan-Fang Lee
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Jye-Daa Chen
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Thau-Ming Cham
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Mei-Ing Chung
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
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4
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Analysis of Bcl I and Xba I polymorphism in factor VIII gene to detect carriers of haemophilia a in Andhra Pradesh. Indian J Clin Biochem 2012; 17:94-8. [PMID: 23105343 DOI: 10.1007/bf02867948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The efficacy of two intragenic polymorphic markers of factor VIII gene has been examined in Andhra Pradesh population with a view to confirm/revise the strategy for carrier detection that would be precise and economical. The haemophilia A carrier was detected using Bcl I and Xba I polymorphic sites in intron 18 and 22 respectively. The cumulative efficiency of these two sites for detection of carriers is 100% since all 15 families tested were informative for one of these polymorphisms, thus confirming their usefulness for factor VIII gene mutations found in Andhra Pradesh.
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Tasleem Raza S, Husain N, Kumar A. Screening for hemophilia A carriers: utility of PCR-RFLP--based polymorphism analysis. Clin Appl Thromb Hemost 2009; 15:78-83. [PMID: 19150994 DOI: 10.1177/1076029607305105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Health schemes are promoting application of molecular diagnosis and screening in peripheral diagnostics labs. Intragenic restriction fragment length polymorphisms in the intron 18 (BclI), intron 19 (HindIII), and intron 22 (XbaI) of the Factor VIII gene were studied in 100 patients with hemophilia A and their relatives at risk from different regions of north India. For Bcl I, HindIII, and XbaI, the positive allele frequency was 0.57, 0.38, and 0.43, respectively, and heterozygosity was 0.54, 0.49, 0.41, respectively, whereas the heterozygosity in terms of informativity of the above markers was 53% for BclI, 44% for HindIII, and 34% for XbaI. Combined informativity of these markers was 77%. Review of Indian and world literature shows a marked variation in the informativity of polymorphic sites. Screening for carriers forms the baseline for prevention of hemophilia A. Polymerase chain reaction-restriction fragment length polymorphism is a low-cost procedure, efficient in the north Indian population.
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Affiliation(s)
- Syed Tasleem Raza
- Genetics Lab, Department of Pathology, King George's Medical University, Lucknow, India
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7
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Abstract
This review focuses on selected areas that should interest both the scientist and the clinician alike: polymorphisms within the factor VIII and factor IX genes, their linkage, and their ethnic variation; a general assessment of mutations within both genes and a detailed inspection of the molecular pathology of certain mutations to illustrate the diverse cause-effect relations that exist; a summary of current knowledge on molecular aspects of inhibitor production; and an introduction to the new areas of factor VIII and factor IX catabolism. An appendix defining various terms encountered in the molecular genetics of the haemophilias is included, together with an appendix providing accession numbers and locus identification links for accessing gene and sequence information in the international nucleic acid databases.
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Affiliation(s)
- D J Bowen
- Department of Haematology, University of Wales College of Medicine, Heath Park, Cardiff, UK.
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Abstract
This review focuses on selected areas that should interest both the scientist and the clinician alike: polymorphisms within the factor VIII and factor IX genes, their linkage, and their ethnic variation; a general assessment of mutations within both genes and a detailed inspection of the molecular pathology of certain mutations to illustrate the diverse cause-effect relations that exist; a summary of current knowledge on molecular aspects of inhibitor production; and an introduction to the new areas of factor VIII and factor IX catabolism. An appendix defining various terms encountered in the molecular genetics of the haemophilias is included, together with an appendix providing accession numbers and locus identification links for accessing gene and sequence information in the international nucleic acid databases.
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Affiliation(s)
- D J Bowen
- Department of Haematology, University of Wales College of Medicine, Cardiff, UK.
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El-Maarri O, Oldenburg J, Cağlayan SH. Intron 22-specific long PCR for the Xba I polymorphism in the factor VIII gene. Br J Haematol 1999; 105:1120-2. [PMID: 10554830 DOI: 10.1046/j.1365-2141.1999.01430.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The Xba I polymorphic site in the factor VIII gene is present in the int22h-1 region which is found in two other copies (int22h-2 and int22h-3) distal to the gene. Previously the polymorphic status of the Xba I locus was studied by either Southern blot or PCR that amplified all three copies. Here we report the use of a long PCR that specifically amplifies the intragenic site in intron 22, making use of this marker an easy and reliable assay. Moreover, about 25% of previously uninformative Turkish haemophilia A families examined with three markers proved to be informative for linkage analysis, using the Xba I polymorphism.
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Affiliation(s)
- O El-Maarri
- Department of Molecular Biology and Genetics, Boğaziçi University, Bebek, Istanbul, Turkey
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El-Maarri O, Kavakli K, Caglayan SH. Intron 22 inversions in the Turkish haemophilia A patients: prevalence and haplotype analysis. Haemophilia 1999; 5:169-73. [PMID: 10444283 DOI: 10.1046/j.1365-2516.1999.00307.x] [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: 11/20/2022]
Abstract
In about half of the severe haemophilia A cases, the disease is caused by an inversion that split the F.VIII gene into two parts separated by approximately 300-400 kb. Herein, we show that in the Turkish population this inversion mutation accounts for 29% of 141 haemophilia A cases and 42% of severe cases. Most of the inversions are of the distal type (72%) whereas nine were of the proximal type (28%). Haplotype analysis using 4 markers in the F.VIII gene did not reveal a single haplotype associated with the inversion. However, the pre- valence of one haplotype: HindIII (-) - Int13 (CA)20 - Int22 (CA + CT)26 - XbaI (-) is higher in the inversion patients. Since founder effect is excluded for the inversion patients, our results suggest that some as yet unknown factor(s) may make these alleles more prone for the inversion. However, a bias due to the low number of studied cases cannot be excluded.
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Affiliation(s)
- O El-Maarri
- Department of Molecular Biology and Genetics, Bogaziçi University, Bebek 80815, Istanbul, Turkey
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Soucie JM, Evatt B, Jackson D. Occurrence of hemophilia in the United States. The Hemophilia Surveillance System Project Investigators. Am J Hematol 1998; 59:288-94. [PMID: 9840909 DOI: 10.1002/(sici)1096-8652(199812)59:4<288::aid-ajh4>3.0.co;2-i] [Citation(s) in RCA: 218] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An active surveillance system was used to identify all residents with hemophilia in six U.S. states (Colorado, Georgia, Louisiana, Massachusetts, New York, and Oklahoma). A hemophilia case was defined as a person with physician-diagnosed hemophilia A or B and/or a measured baseline factor VIII or IX activity (FA) of 30% or less. Case-finding methods included patient reports from physicians, clinical laboratories, hospitals, and hemophilia treatment centers. Once identified, trained data abstractors collected clinical and outcome data retrospectively from medical records. Among cases identified in 1993-1995, 2,743 were residents of the six states in 1994, of whom 2,156 (79%) had hemophilia A. Of those with available FA measurements, 1,140 (43%) had severe (FA < 1%), 684 (26%) had moderate (FA 1%-5%), and 848 (31%) had mild (FA 6%-30%) disease. The mean and median age was 25.4 and 23 years, respectively. The age-adjusted prevalence of hemophilia in all six states in 1994 was 13.4 cases/100,000 males (10.5 for hemophilia A and 2.9 for B). The prevalence by race/ethnicity was 13.2 cases/100,000 among white, 11.0 among African American, and 11.5 among Hispanic males. Application of age-specific prevalence rates from the six surveillance states to the U.S. population resulted in an estimated national population of 13,320 cases of hemophilia A and 3,640 cases of hemophilia B. For the 10-year period 1982-1991, the average incidence of hemophilia A and B in the hemophilia surveillance system (HSS) states was estimated to be 1 in 5,032 live male births.
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Affiliation(s)
- J M Soucie
- National Center for Infectious Diseases, Hematologic Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
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Chan V, Yu YL, Chan TP, Yip B, Chang CM, Wong MT, Chan YW, Chan TK. DNA analysis of Huntington's disease in southern Chinese. J Med Genet 1995; 32:120-4. [PMID: 7760321 PMCID: PMC1050233 DOI: 10.1136/jmg.32.2.120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Allelic frequencies of RFLPs at loci closely linked to the HD gene, D4S95, D4S91, D4S141, and D4S90, were determined in 13 Huntington's disease (HD) patients from nine Chinese families and 129 normal subjects. These were similar for non-HD and HD chromosomes and the HD gene in Chinese is associated with multiple haplotypes. Hence the HD gene probably arose independently in the background haplotypes of the Chinese population. The heterozygosity rates for the two most useful RFLP sites are 0.659 for D4S95-AccI VNTR and 0.494 for D4S141-HindIII. (CAG)n repeat numbers ranged from 12 to 27 in 174 normal chromosomes. In 52 meiotic recombinations, the (CAG)n repeats were stably inherited in normal families. In HD families, 12 of 13 HD patients had expanded (CAG)n repeats of 40 to 58. Additionally, 10 asymptomatic family members had expanded (CAG)n repeats and the inheritance of the expanded repeat was unstable in these families.
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Affiliation(s)
- V Chan
- University Department of Medicine, Queen Mary Hospital, Hong Kong
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Yip B, Chan V, Chan TK. Intragenic dinucleotide repeats in factor VIII gene for the diagnosis of haemophilia A. Br J Haematol 1994; 88:889-91. [PMID: 7819115 DOI: 10.1111/j.1365-2141.1994.tb05134.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Two multi-allelic microsatellite polymorphisms within the factor VIII gene were studied in 138 Chinese subjects. The allele sizes detected were higher than those found in Caucasian populations, whereas the heterozygosity rates were lower, being 0.5370 for intron 13 and 0.4444 for intron 22 repeats respectively. Their usefulness in diagnosis was compared to other intragenic and extragenic RFLPs, using previous data on the same 31 unrelated haemophilia A families. These intragenic microsatellite repeat polymorphisms were only informative for 18/31 families (58%); however, with the combined use of all existing RFLPs, the cumulative informativeness would be 100%.
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Affiliation(s)
- B Yip
- University Department of Medicine, Queen Mary Hospital, Hong Kong
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Lehesjoki AE, Sistonen P, Rasi V, de la Chapelle A. Hemophilia A: genetic prediction and linkage studies in all available families in Finland. Clin Genet 1991; 39:199-209. [PMID: 2036741 DOI: 10.1111/j.1399-0004.1991.tb03012.x] [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: 12/29/2022]
Abstract
RFLP studies were done in 82 (75%) of all known hemophilia A families in the Finnish population (approximately 5 million). Two intragenic RFLPs (Bc1I/F8A, XbaI/p482.6) and two extragenic markers (TaqI/St14, Bg1II/DX13) were used. Among 263 females at risk, carriership could be evaluated with an intragenic marker in 47% and with an extragenic marker in 26%. In 27% of the females, carriership could be neither excluded nor confirmed; 68% of these females were relatives of an isolated patient. Eight recombinations between the factor VIII gene (F8C) and DXS52 (lod 25.02 at theta max 0.06), eight recombinations between F8C and DXS15 (lod 21.91 at theta max 0.05), and two recombinations between DXS52 and DXS15 (lod 33.56 at theta max 0.01) were found. Using multipoint linkage analysis, the most likely order of loci supported by the data was: F8C-DXS15-DXS52-DXS134. RFLP segregation analysis provides a highly useful method of carrier detection and prenatal diagnosis of hemophilia A, but its limitations must be carefully taken into account.
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Affiliation(s)
- A E Lehesjoki
- Department of Medical Genetics, University of Helsinki, Finland
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Van-de-Water NS, Ridgway D, Ockelford PA. Restriction fragment length polymorphisms associated with the factor VIII and factor IX genes in Polynesians. J Med Genet 1991; 28:171-6. [PMID: 1675686 PMCID: PMC1016800 DOI: 10.1136/jmg.28.3.171] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
New Zealand Maoris (72 X chromosomes) have been compared with Pacific Island Polynesians (121 X chromosomes) and Caucasian New Zealanders (51 X chromosomes) as a control group to determine the allelic frequency of six RFLPs associated with the genes for two X linked diseases (haemophilia A and haemophilia B). RFLPs examined were BclI, XbaI, and BglI within the factor VIII gene, the factor VIII extragenic TaqI system, and the factor IX intragenic TaqI and XmnI sites. The information obtained facilitates the design of strategies for both carrier detection and prenatal diagnosis of haemophilia A within these groups. Strong linkage disequilibrium was observed between the factor VIII BclI and XbaI sites in Polynesians. Genetic counselling for Polynesians with haemophilia B continues, however, to rely on phenotypic diagnosis. The RFLP data from the two separate loci on the X chromosome in Polynesians show similarities with Chinese and Japanese populations, reinforcing theories of an early Polynesian ancestry originating in east Asia.
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de la Salle C, Wu Q, Baas MJ, Hanauer A, Ruan C, Cazenave JP. Common intragenic and extragenic polymorphisms of blood coagulation factors VIII and IX are different in Chinese and Caucasian populations. Clin Genet 1990; 38:434-40. [PMID: 1981181 DOI: 10.1111/j.1399-0004.1990.tb03609.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In order to examine the possibilities of carrier detection and prenatal diagnosis in hemophilia A and B in the Chinese region of Suzhou, we analyzed four different RFLPs within the factor IX gene and two intragenic RFLPs and one extragenic RFLP for the factor VIII gene. The results obtained show important differences between the Chinese and Caucasian populations. No polymorphism was found within the factor IX gene in the Chinese population and the informativity obtained for the factor VIII gene was quite different between the two populations for each RFLP studied.
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Affiliation(s)
- C de la Salle
- INSERM U.311, Centre Régional de Transfusion Sanguine, Strasbourg, France
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Nafa K, Meriane F, Reghis A, Benabadji M, Demenais F, Guilloud-Bataille M, Sultan Y, Kaplan JC, Delpech M. Investigation of factor VIII:C gene restriction fragment length polymorphisms and search for deletions in hemophiliac subjects in Algeria. Hum Genet 1990; 84:401-5. [PMID: 1969840 DOI: 10.1007/bf00195808] [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: 12/29/2022]
Abstract
The frequency of alleles for intragenic (intron 17 and intron 25) and extragenic (DXS15 and DXS52) F8C RFLPs was investigated in the Algerian population. Altogether 287 X chromosomes (97 males and 95 females) were studied. The allele frequencies found with the two intragenic F8C RFLPs were not substantially different from those reported in a Mediterranean population. At the highly polymorphic extragenic DXS52 locus the distribution in Algeria differed from that found in France. A new allele (14 kb), called 1 DZ, was found in 3.1% of the chromosomes. Fifty-one families with hemophilia A were studied with the same probes (374 subjects). Of the females, 94% were informative for at least one intra- or extragenic RFLP. Two recombinations were found between DXS52 and F8C, of which one occurred between the DXS15, DXS52 block and F8C, indicating that the two anonymous loci are on the same side of the F8C gene. Only two obvious gene deletions were observed in 73 unrelated hemophiliacs: one encompassed exons 14-22 (about 4.3 kb of cDNA and 36 kb of genomic DNA); the other removed the last exon (exon 26, representing 2 kb of cDNA).
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Affiliation(s)
- K Nafa
- Centre de Transfusion Sanguine, CHU Mustapha, Alger, Algeria
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Chan V. Prenatal diagnosis of alpha and beta thalassemias and hemophilia A: experience in Hong Kong. Clin Biochem 1990; 23:79-84. [PMID: 1970518 DOI: 10.1016/0009-9120(90)90525-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Methods and strategies are described for the prenatal diagnosis of three common congenital disorders--alpha and beta thalassemias and hemophilia A. It is important to study the frequency of restriction fragment length polymorphisms and types of molecular defects in specific ethnic groups, since they are known to differ significantly. The studies reported here were carried out in southern Chinese who form the majority of the Hong Kong population. The information obtained is also useful for prenatal diagnosis in southern Chinese migrant populations in Canada, USA, Australia, UK and southeast Asia.
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Affiliation(s)
- V Chan
- Department of Medicine, University of Hong Kong, Queen Mary Hospital
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Herrmann FH, Wehnert M, Wulff K. RFLP analysis for diagnosis of haemophilia A in the German Democratic Republic. Clin Genet 1990; 37:12-7. [PMID: 1967988 DOI: 10.1111/j.1399-0004.1990.tb03384.x] [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: 12/29/2022]
Abstract
The frequencies of Bcl I, Hind III and Xba I intragenic polymorphic sites in the population of the GDR were found to be 0.68, 0.38 and 0.48, respectively. No differences in composition and frequencies were detectable at DXS 52 locus in comparison with other Caucasian populations. A strong linkage disequilibrium between the intragenic Bcl I and Hind III sites could be confirmed. The observed heterozygosity for the flanking marker DXS 52 in combination with intragenic Bcl I and Xba I polymorphisms was 0.97. Using these three RFLPs, 122 females at risk in 41 independent haemophilia A families were investigated; 86 of them could be identified and 27 excluded as carriers; 9 females could not be classified. So far, four prenatal diagnoses in the first trimester of gestation have been performed by RFLP analysis.
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Affiliation(s)
- F H Herrmann
- Institute of Medical Genetics, Ernst-Moritz-Arndt-Universität, Greifswald, GDR
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Chan V, Tong TM, Chan TP, Tang M, Wan CW, Chan FY, Chu YC, Chan TK. Multiple XbaI polymorphisms for carrier detection and prenatal diagnosis of haemophilia A. Br J Haematol 1989; 73:497-500. [PMID: 2575402 DOI: 10.1111/j.1365-2141.1989.tb00287.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Three XbaI restriction fragment length polymorphisms (RFLPs) can be detected using the factor VIII-intron 22 probe (p482.6) in a XbaI-KpnI double digest of genomic DNA. The XbaI (A) site had been reported by Wion et al (1986) to be in intron 22, while the two additional sites. XbaI (B) and XbaI (C), are shown here to be X-linked and close to the XbaI (A) site. The frequencies of heterozygosity for these three sites are 0.49, 0.18 and 0.30 respectively. In 75 females the observed heterozygosity rate for the XbaI (A) site is 0.41 and this increased to 0.57 with the two additional sites. Care should be exercised when interpreting the XbaI RFLPs, since the 1.4 kb XbaI/KpnI fragment and the 4.8 kb XbaI fragment are associated with both positive XbaI (A) and XbaI (B) sites. By the combined use of the multiple XbaI polymorphisms with the BclI site in intron 18, the carrier detection rate would increase to 67%. Four prenatal diagnoses had been performed using the multiple XbaI polymorphisms.
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Affiliation(s)
- V Chan
- University Department of Medicine, Queen Mary Hospital, Hong Kong
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