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Tumor Progression02:07

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
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Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
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CLLを誘発する変異とその進行と再発の進化

Dan A Landau1,2,3,4, Eugen Tausch5, Amaro N Taylor-Weiner1

  • 1Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, USA.

Nature
|October 16, 2015
PubMed
まとめ

研究者は44の変異遺伝子と11の複製数の変化を慢性リンパ球性白血病 (CLL) で特定しました. この研究は,CLLの発達と進化の重要な経路を明らかにし,がんの再発と結果についての洞察を提供します.

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科学分野:

  • 癌 生物学
  • ゲノミクス
  • 血液学的悪性腫瘍

背景:

  • 癌を誘発する遺伝子の変化を理解することは 極めて重要です
  • 慢性リンパ球性白血病 (CLL) の病原性については,さらなる解明が必要である.
  • 病気と治療中の腫瘍の進化は 重要な問題です

研究 の 目的:

  • CLLにおける再発性遺伝子変異を特定する.
  • CLLの腫瘍形成に関与する経路を決定する.
  • ドライバーの出来事の進化とその再発への影響を再構築する.

主な方法:

  • 全エクソムの配列化で538のCLLと 配合した生殖DNAのサンプルです
  • 前向きな臨床試験から 278個のサンプルを分析した.
  • クローナリティ分析と治療前のサンプルと再発サンプルの比較

主要な成果:

  • 44の繰り返し変異した遺伝子と11の体内複製数の変異を特定した.
  • 発見された新たな癌原因 (例えば,RPS15,IKZF3)
  • 中心的なCLL経路としてRNA処理/輸出,MYC活動,およびMAPKシグナル伝達が強調されています.
  • 治療前のサンプルと再発したサンプル間のクローン進化が頻繁に示された.

結論:

  • 臨床サンプルの大規模なシーケンシングは,新しいがん遺伝子の発見を助けます.
  • CLLのドライバーイベントのネットワークを解明しました.
  • 病気の再発と臨床結果に対するクローン進化の影響を洞察した.