Thromb Haemost 1995; 74(04): 1009-1014
DOI: 10.1055/s-0038-1649870
Original Article
Clinical Studies
Schattauer GmbH Stuttgart

Diagnosis of Hemophilia B Carriers Using Two Novel Dinucleotide Polymorphisms and Hha I RFLP of the Factor IX Gene in Japanese Subjects

Hisato Toyozumi
1   The First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
,
Tetsuhito Kojima
1   The First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
,
Tadashi Matsushita
1   The First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
,
Motohiro Hamaguchi
1   The First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
,
Mitsune Tanimoto
1   The First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
,
Hidehiko Saito
1   The First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan
2   Aichi Blood Research Foundation, Nagoya, Japan
› Author Affiliations
Further Information

Publication History

Received 28 April 1995

Accepted after resubmission 06 July 1995

Publication Date:
09 July 2018 (online)

Preview

Summary

We identified two novel dinucleotide polymorphisms in intron A at nucleotide 192 (FIX 192) and in the 5’ flanking region at nucleotide -793 (FIX-793) of the factor IX gene, which are present in normal Japanese. The Hha I restriction fragment length polymorphism (FIX-Hhal) located 8 kb 3’ to the factor IX gene was also found to be an efficient marker for detecting carriers in a Japanese family with hemophilia B. Each of these polymorphisms was able to be rapidly ascertained by the polymerase chain reaction (PCR) technique. In 22 Japanese families with hemophilia B, 18 families (81.8%) were heterozygous for at least one of these polymorphisms, whereas 11 (50%) were informative for the extragenic DXS99/Sac I RFLP which was previously reported as a useful gene marker for Japanese hemophilia B. Using all 4 polymorphisms together, the informative rate improved to 86.4%. Carrier detection and, possibly, the prenatal diagnosis of hemophilia B can be achieved effectively and rapidly in Japanese with these polymorphisms.