Journal
LEUKEMIA & LYMPHOMA
Volume 60, Issue 5, Pages 1283-1288Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10428194.2018.1529310
Keywords
BIM deletion polymorphism; follicular lymphoma; female; progression-free survival; epidemiology
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Deletion polymorphism of BCL-2-like protein 11 (BIM) is specifically found in East Asia. To explain some epidemiological discrepancies between Asian and Western countries, we analyzed a silent single nucleotide polymorphism (SNP) in exon 5 (c465C > T) and a deletion site (2903 bp) in intron 2 in 77 patients with follicular lymphoma by the Q-invader method using PCR. In females, 5-year progression-free survivals (PFS) were 20.0% in the BIM deletion group, 66.7% in the SNP group and 81.5% in the wild-type (WT) group (p = .0012). In the WT group, 5-year PFS was 40.4% in males (p = .0448 vs. female PFS). This tendency was strengthened in patients receiving rituximab (26.9% vs. 84.2%, p = .006). Superior PFS in the WT females in Japan was comparable with the results of cohort studies in the United States and Sweden. Favorable prognosis in Japanese females may be masked by the BIM deletion polymorphism.
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