Phenotype-genotype Correlation in CD36 Deficiency Types I and II
Hidekatsu Yanai (1), (2) , Hitoshi Chiba (1) , Hironobu Fujiwara (1),(2) , Mie Morimoto (4) , Keisuke Abe (3) , Shigeru Yoshida (1) , Yukihiro Takahashi (1), (2) , Hirotoshi Fuda (1) , Shu-Ping Hui (1),(2) , Harukuni Akita (1) , Kunihiko Kobayashi (2) ,
From the Departments of (1) Laboratory Medicine, (2) Pediatrics, and (3) Internal Medicine III, Hokkaido University School of Medicine, Sapporo, Japan, and the (4) College of Medical Technology, Hokkaido University, Sapporo, Japan
CD36 deficiency was studied with attention to the phenotypegenotype
relationship. The diagnosis of CD36 deficiency was made
when CD36 was negative on platelets (type II) or on both platelets and
monocytes (type I). Among 827 apparently healthy Japanese volunteers,
the type I and II deficiencies were found in 8 (1.0%) and 48 (5.8%),
respectively. The T for C substitution at nt478 for Pro90Ser and the
insertion of A at nt1159 constituted the major causes of type I and II
deficiencies. The dinucleotide deletion at nt539 had a minor role.
In two family studies, we found a previously unreported polymorphic
site in the 5’-proximal flanking region and the 3’-untranslated region.
Including these new polymorphisms, DNA sequence other than the
three known mutations affecting CD36 expression was not observed in
the CD36 gene, calling into question the previous hypothesis that a
platelet-specific silent allele exists near or at the CD36 gene.