ヒトのB細胞受容体レパートリーに共通するクローンタイプの高頻度
Cinque Soto1,2, Robin G Bombardi1, Andre Branchizio1
1The Vanderbilt Vaccine Center, Vanderbilt University Medical Center, Nashville, TN, USA.
Nature
|February 15, 2019
まとめ
この研究では,個人がB細胞受容体レパートリーの大部分を共有し,一人当たり何百万ものユニークなB細胞クローンタイプがあることがわかりました. 共通のクローンタイプの高い流行は,共通の免疫反応を示し,健康と病気の洞察を提供します.
科学分野:
- 免疫学
- ゲノミクス
- バイオ情報学
背景:
- 適応性免疫システムは,抗原認識のためにB細胞受容体 (BCRs) に依存しています.
- BCRのレパートリーの完全な多様性と個別的な共有は,ほとんど知られていません.
- BCRのレパートリーサイズと重複の理解は,免疫システム研究にとって極めて重要です.
研究 の 目的:
- 個々のB細胞受容体の大きさを決定する.
- 個体間で共有されるB細胞受容体クローンタイプの範囲を調査する.
- 共有されたB細胞のレパートリーを形作る要因を探求する.
主な方法:
- 再結合および発現したB細胞受容体遺伝子の配列決定
- 複数の個体におけるB細胞クローンタイプの分析
- 被験者間の共有型とプライベート型の比較
主要な成果:
- それぞれの個体には 9~17百万のB細胞のクローンタイプがあります
- 重鎖と軽鎖のクローンタイプの有意な割合は個体間で共有されています.
- 大人および帯血のサンプルの両方で共通のクローン型が発見され,抗原への曝露以外の要因を示唆した.
結論:
- 個々のB細胞のレパートリーは広大ですが 基本的に共有されています
- 共有されたB細胞のクローンタイプは,共通の抗原被曝以外の要因によって形成されます.
- 共通のクローン型を特定することで,健康と病気におけるB細胞免疫の理解を深めることができます.
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