Document Detail

Molecular analysis of secretor type alpha(1,2)-fucosyltransferase gene mutations in the Chinese and Thai populations.
MedLine Citation:
PMID:  10533829     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The human Lewis histo-blood group system belongs to a family of structurally related oligosaccharides. The mutations of fucosyltransferase genes alpha(1,2)-fucosyltransferase (FUT2 or Se) and alpha(1,3/1,4)-fucosyltransferase (FUT3 or Le), are responsible for the polymorphism of Lewis blood group phenotypes. However, a population study of the FUT2 mutation in Chinese and Thais has not yet been done, and there is some controversy about the phenotypes of Le(a+b+) and Le(a+b-). STUDY DESIGN AND METHODS: One hundred twentyfour Chinese and 70 Thais were phenotyped for Lea and Le(b). DNA samples were studied by polymerase chain reaction and then by a restriction enzyme digestion method to distinguish wild-type and six known mutations. Direct sequencing was done for controls and some uncertain cases. RESULTS: A new mutation, C302T mutation, was found in 2 of 136 chromosomes in the Thai population; none were discovered in Chinese. The frequencies of the normal and six mutant alleles among Chinese and Thais, respectively, were as follows: 134 (54.0%) of 248 and 58 (41.4%) of 140 were wild-type (Se); 0 of 248 and 2 of 140 (both 1.4%) had the G428A mutation; 120 (48.4%) of 248 and 75 (53.6%) of 140 had the A385T mutation; 2 (0.81%) of 248 and 0 of 140 had the C571T mutation; and 1 (0.4%) of 248 and 3 (2.2%) of 140 had the G849A mutation. Only 1 Chinese (0.4%) of 248 had the C628T mutation, and none had fusion gene mutation. CONCLUSION: The FUT2 genes encoding for the phenotypes Le(a+b+) and Le(a+b-) are the same. The function and character of the mutant enzyme may play an important role in the phenotype. The methods used in this study are clinically applicable in population studies of the FUT2 gene polymorphism to explore relationships among different ethnic groups and correlations between phenotype and genotype.
J G Chang; T Y Yang; T C Liu; T P Lin; C J Hu; M C Kao; N M Wang; F J Tsai; C T Peng; C H Tsai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Transfusion     Volume:  39     ISSN:  0041-1132     ISO Abbreviation:  Transfusion     Publication Date:  1999 Sep 
Date Detail:
Created Date:  1999-11-05     Completed Date:  1999-11-05     Revised Date:  2005-01-18    
Medline Journal Info:
Nlm Unique ID:  0417360     Medline TA:  Transfusion     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1013-7     Citation Subset:  IM    
Department of Medical Research and Pediatrics, China Medical College Hospital, Taichung, Taiwan.
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MeSH Terms
China / epidemiology
Cloning, Molecular
Fucosyltransferases / genetics*
Point Mutation
Restriction Mapping
Sequence Analysis
Taiwan / epidemiology,  ethnology
Thailand / ethnology
Reg. No./Substance:
EC 2.4.1.-/Fucosyltransferases; EC 2-alpha-L-fucosyltransferase

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