c.634+1G>Aスプライスサイト変異を宿す新しいRHD*01Nアレルは,中国の献血者におけるRhD陰性フェノタイプを生成する

Xu Zhang^1,2,3, Zhu-Ren Zhou^1,2,3, Xu-Ying Huang^1,2,3

¹Institute of Transfusion Medicine, Liaoning Blood Center, Shenyang, Liaoning, China.

Transfusion

|September 5, 2025

まとめ

中国人の献血者において,c.634+1G>Aのスプライスサイト変異を持つ新しいRHDアレルが特定され,RHD陰性フェノタイプを説明した. この発見はD陰性血液型における民族的な多様性を強調しています

科学分野:

遺伝学と分子生物学
免疫学と輸血

背景:

D陰性血液群のフェノタイプは,その基礎となる分子遺伝学において相当な民族的多様性を表しています.
これらの違いを理解することは血液型を正確に決定し輸血の適合性を確保するために極めて重要です

研究の目的:

中国人献血者のD陰性表型に寄与する新しい遺伝的変異を特定し,特徴づけること.
D陰性状態に関連した特定のRHDアレルの分子基盤を調査する.

主な方法:

D抗原の判定のための血清検査 (塩溶液法,間接抗グローブリン検査)
RHD遺伝子エクソン10増幅,サンガー配列,単分子リアルタイム配列 (SMRT) を含む分子分析.
SpliceAIを用いたシリコ分析で,特定された変異がスプライシングに与える機能的影響を予測する.

主要な成果:

血液提供者はRHD遺伝子 (10エクソン陽性) が存在しているにもかかわらず,フェノタイプ的にはD陰性であった.
新しいRHDアレル,RHD*01Nが特定され,c.634+1G>Aスプライスサイト変異によって特徴付けられました.
SpliceAIの分析では,c.634+1G>Aの変種がRHDの遺伝子スプライシングに有意な影響を及ぼすことが確認されました.

結論:

c.634+1G>Aのスプライスサイト変異を持つ新しいRHDアレル (RHD*01N) が,この中国人のD陰性表型の原因である.
この発見は,複雑な血液型フェノタイプを解明する分子技術の重要性を強調し,RHD遺伝子の民族遺伝的多様性を強調しています.

キーワード:

RhD陰性フェノタイプ新しいRHDアレル c.634+1G>A 接合部位の変形

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