HLA-B locus in Japanese patients with anti-epileptics and allopurinol-related Stevens-Johnson syndrome and toxic epidermal necrolysis.
BACKGROUND
Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are rare but life-threatening severe cutaneous adverse reactions. Recently, strong associations of HLA-B*1502 and HLA-B*5801 with carbamazepine- and allopurinol-induced severe cutaneous adverse reactions were found in Han Chinese patients, respectively, but ethnic differences in the associations have been reported. The objective of this study is to clarify the involvement of HLA-B*1502 and HLA-B*5801 in Japanese SJS/TEN patients.


METHODS
HLA-B genotyping was performed on 58 Japanese SJS/TEN patients between July 2006 and April 2008 from multicenters in Japan.


RESULTS
There were no HLA-B*1502 carriers among 58 SJS/TEN patients. This patient group included seven carbamazepine-related and 11 aromatic anti-epileptic agent-related SJS/TEN patients. In addition, there were five HLA-B*5801 carriers, which included four allopurinol-related SJS/TEN patients.


CONCLUSIONS
While HLA-B*1502 is unlikely to be associated with carbamazepine-related or aromatic anti-epileptic agent-related SJS/TEN, HLA-B*5801 was significantly associated with allopurinol-related SJS/TEN in Japanese.
Kaniwa
Nahoko
N
Division of Medicinal Safety Science, National Institute of Health Sciences, 1-18-11 Kamiyoga, Setagaya-ku, Tokyo. nkaniwa@nihs.go.jp
Saito
Yoshiro
Y
Aihara
Michiko
M
Matsunaga
Kayoko
K
Tohkin
Masahiro
M
Kurose
Kouichi
K
Sawada
Jun-ichi
J
Furuya
Hirokazu
H
Takahashi
Yukitoshi
Y
Muramatsu
Masaaki
M
Kinoshita
Shigeru
S
Abe
Masamichi
M
Ikeda
Hiroko
H
Kashiwagi
Mariko
M
Song
Yixuan
Y
Ueta
Mayumi
M
Sotozono
Chie
C
Ikezawa
Zenro
Z
Hasegawa
Ryuichi
R
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000493:Allopurinol / Q000009:adverse effects*; D000927:Anticonvulsants / Q000009:adverse effects*; D044466:Asian People / Q000235:genetics*; D002648:Child; D005260:Female; D005838:Genotype; D015235:HLA-B Antigens / Q000235:genetics*; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D013262:Stevens-Johnson Syndrome / Q000139:chemically induced* / Q000175:diagnosis / Q000209:etiology* / Q000235:genetics; D055815:Young Adult
D000927:Anticonvulsants; D015235:HLA-B Antigens; D000493:Allopurinol