Abstract:
:We have identified a novel polymorphism located in intron 1a of the human factor VII gene, caused by the nucleotide change G to A at position + 73. In a population of 128 healthy individuals from northern Italy, the variant A73 allele had a frequency of 0.21, whereas the frequency of the previously reported 10 bp insertion allele located at -323 in the promoter region was 0.17 and that of the Q353 allele in the catalytic region of the factor VII gene was 0. 20. In 75% of the healthy individuals, the A73 allele was present together with the 10 bp insertion and the Q353 alleles, indicating a strong linkage disequilibrium. The concomitant presence of A73 with both the 10 bp and the Q353 alleles was associated with the lowest factor VII levels, measured as coagulant activity, activated factor VII and factor VII antigen. The G73A polymorphism was also evaluated in 190 survivors of myocardial infarction who had experienced the event before the age of 45 years and in 179 individuals with a negative exercise test matched with patients for sex, age and geographical origin. Patients carrying the A73 allele associated with lower factor VII levels tended to have a lower risk of myocardial infarction (adjusted odds ratio 0.54; 95% confidence intervals 0.29-0.99). In conclusion, we found a novel variant allele in intron 1a of the human factor VII gene that is often associated in healthy individuals with the 10 bp and Q353 alleles in the promoter and catalytic region of the same gene. This intronic mutation, alone or in association with other factor VII gene polymorphisms, might confer protection against myocardial infarction in the young.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Peyvandi F,Mannucci PM,Bucciarelli P,Zeinali S,Akhavan S,Sacchi E,Merlini PA,Perry DJdoi
10.1046/j.1365-2141.2000.01833.xsubject
Has Abstractpub_date
2000-02-01 00:00:00pages
247-53issue
2eissn
0007-1048issn
1365-2141pii
bjh1833journal_volume
108pub_type
杂志文章abstract::Three patients with probable congenital erythrocytosis were studied to determine the role of erythropoietin (ESF) in their disease. In addition, haemoglobin function was measured and ESF excretion determined in response to reduction in the haemoglobin concentration. In two cases ESF excretion was clearly elevated abov...
journal_title:British journal of haematology
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journal_title:British journal of haematology
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journal_title:British journal of haematology
pub_type: 杂志文章
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journal_title:British journal of haematology
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pub_type: 杂志文章
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journal_title:British journal of haematology
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