免疫再構築と,移植されていない小児がんの生存者のブースターワクチン接種の必要性:単一センターでの経験

Esther Shin¹, Haesol Han¹, Kenneth J Nobleza²

¹University of Incarnate Ward School of Medicine, San Antonio, Texas, USA.

Cancer reports (Hoboken, N.J.)

|September 1, 2025

まとめ

小児がんの生存者は,治療後の免疫力が低下しています. ほとんどの患者は,保護を回復するために,B型肝炎と肺炎球菌ワクチンのブースターを必要とします.

科学分野:

小児腫瘍学
免疫学
ワクチン学

背景:

乳がんの生存者は,化学療法/免疫療法の後に深刻に免疫力が低下します.
CCSは生命を脅かす感染症のリスクが著しく増加します.
免疫再構成を評価し,非移植性CCSに対する再接種をガイドするために,制度的慣行基準 (SOP) が作成されました.

研究の目的:

治療後約6ヶ月後の小児がん生存者の免疫再構成を評価する.
この集団における再接種戦略の有効性を評価する.
CCSのワクチン接種プロトコルを実施する際の課題を特定する.

主な方法:

リンパ球増殖検査 (PHA,ConA,PWM) を実施した.
B型肝炎 (hepB) ウイルス,テタヌス毒素,Streptococcus pneumoniaeに対するIgG抗体の血清濃度を測定した.
血清学的状態に基づいてブースターおよびキャッチアップワクチンの推奨が提供されました.

主要な成果:

すべての患者は,治療から6ヶ月後に免疫回復を示した.
患者の約80%がhepBおよびS. pneumoniaeに対して血清陰性であったが,ほぼ100%が疹免疫を維持していた.
単一のブースターは,hepBの86%とPPSVの76%で血清転換を達成しましたが,SOPでは機会が逃されたことが指摘されました.

結論:

ほとんどのCCSは,治療後6ヶ月で不活性化ワクチンの再免疫に適しています.
ワクチン接種で予防可能な感染症に対する保護を最適化するために,ブースター接種は極めて重要です.
年齢,がんの種類,治療の強度などの患者特有の要因に基づいてガイドラインを調整するには,さらなる研究が必要です.

キーワード:

再予防接種生き残りについてワクチン接種免疫解消

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