Discontinuation of imatinib in Japanese patients with chronic myeloid leukemia

Naoto Takahashi, Taiichi Kyo, Yasuhiro Maeda, Takashi Sugihara, Kensuke Usuki, Tatsuya Kawaguchi, Noriko Usui, Shinichiro Okamoto, Yokiko Ohe, Shigeki Ohtake, Kunio Kitamura, Masahide Yamamoto, Hirofumi Teshima, Toshiko Motoji, Toshiharu Tamaki, Kenichi Sawada, Kazuma Ohyashiki

研究成果: Article査読

117 被引用数 (Scopus)

抄録

It was recently recognized that some chronic myeloid leukemia patients with a complete molecular response could sustain that response after discontinuation of imatinib. To characterize the clinical outcomes and profiles of chronic phase chronic myeloid leukemia patients who could discontinue imatinib, we conducted a nationwide survey in Japan. Among 3,242 imatinib-treated chronic myeloid leukemia patients, we identified 50 who had discontinued imatinib for at least six months; of these we analyzed 43. Molecular recurrence was detected in 19 patients, and a complete molecular response rate was estimated to be 47% following imatinib discontinuation. Based on multivariate regression analysis, imatinib dose intensity and prior interferon-α administration were independently predictive of molecular recurrence within 12 months. The depth of the molecular response should be a factor influencing long-term sustained complete molecular response after discontinuation of imatinib. Additionally, an immunological mechanism modified by interferon-α might control chronic myeloid leukemia stem cells.

本文言語English
ページ(範囲)903-906
ページ数4
ジャーナルHaematologica
97
6
DOI
出版ステータスPublished - 2012 6月 1
外部発表はい

ASJC Scopus subject areas

  • 血液学

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