小児白血病における輸血性鉄過剰症
Nihal Karadaş1, Erkam Dolapçi1, Ayshe Gadashova1
1Department of Pediatric Hematology, Ege University Faculty of Medicine, Children's Hospital, Izmir, Turkey.
Pediatric blood & cancer
|January 6, 2026
まとめ
輸血により、小児白血病患者は鉄過剰症を発症することが多い。フェリプロックスによる鉄キレート療法は、軽度の副作用で鉄負荷を軽減する上で安全かつ有効である。
科学分野:
- 血液学
- 小児腫瘍学
- 薬理学
背景:
- 鉄過剰症は、小児白血病患者において重要な懸念事項である。
- 白血病患者における慢性的な輸血は、過剰な鉄蓄積につながる可能性がある。
- 治療関連合併症の管理において、鉄状態の評価は極めて重要である。
研究 の 目的:
- 小児白血病患者における鉄過剰症を調査する。
- フェリプロックスを用いた鉄キレート療法の安全性と有効性を評価する。
- 除鉄療法の必要性を予測する因子を特定する。
主な方法:
- 急性白血病の小児208人を対象とした医学的記録の後ろ向きスクリーニング。
- フェリプロックス投与群と非投与群の間での鉄状態、濃厚赤血球(pRBC)量、および輸血歴の比較。
- 除鉄療法の必要性を予測するための血清フェリチン、累積pRBC量、およびpRBC輸血回数のカットオフ値の決定。
主要な成果:
- 193人の患者が登録され、44人(22.8%)が鉄キレート療法を受けた。
- キレート療法を必要とする患者は、pRBC輸血量、累積pRBC輸血量、およびフェリチン値が有意に高かった。
- 血清フェリチン(1952 mcg/L)、累積pRBC輸血量(145 mL/kg)、およびpRBC輸血回数(12回)の予測カットオフ値が確立された。
- フェリプロックスは鉄負荷を軽減する上で有効性と安全性を実証し、軽度から中等度の有害事象のみが報告された。
結論:
- 鉄過剰症は、小児白血病患者における一般的な合併症である。
- 濃厚赤血球輸血の回数と累積輸血量は、鉄過剰症と関連している。
- フェリプロックスによる鉄キレート療法は、この集団における鉄過剰症の管理のための安全かつ効果的な戦略である。
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