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関連する概念動画

Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

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Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
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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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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.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
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SS18::SSXおよびBRD9による滑膜肉腫の分化制御

Anna Kuntze1, Victor Banerjee2, Marcel Trautmann1

  • 1Gerhard-Domagk-Institute of Pathology, University Hospital Münster, 48149 Münster, Germany.

Cells
|December 24, 2025
PubMed
まとめ

滑膜肉腫（SySa）はSS18::SSXによって駆動され、BAF複合体と細胞分化に影響を与える。本研究により、SS18::SSXとBRD9が上皮間葉転換（EMT）因子を調節し、SySa腫瘍の表現型に影響を与えることが明らかになった。

キーワード:
BAF複合体BRD9E-カドヘリンEMTGBAFSS18::SSXSlugSnail分化滑膜肉腫

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科学分野:

  • Oncology
  • Molecular Biology
  • Genetics

背景:

  • 滑膜肉腫（SySa）は、SS18::SSX融合タンパク質によって駆動される軟部組織の悪性腫瘍である。
  • この融合タンパク質はBAFクロマチンリモデリング複合体に影響を与え、遺伝子転写を変化させ、腫瘍の不均一性を引き起こす。
  • 現在の治療法は効果が限定的であり、SySaの分子メカニズムのより深い理解が必要とされている。

研究 の 目的:

  • SS18::SSXおよび特定のBAFサブユニットのSySa分化における役割を調査する。
  • これらの構成要素が上皮間葉転換（EMT）および関連因子をどのように調節するかを探求する。

主な方法:

  • Nanostringアッセイを用いて、SS18::SSXおよびBRD9のサイレンシングによる遺伝子発現変化を評価した。
  • 公開されている単一細胞RNAシーケンシングデータを解析して、結果を検証した。
  • SS18::SSX、BRD9、EMT因子（Snail、Slug）、およびE-カドヘリンの発現に焦点を当てた。

主要な成果:

  • SS18::SSXおよびGBAFサブユニットであるBRD9のサイレンシングは、SySa細胞分化経路を調節した。
  • SS18::SSXおよびBRD9は、EMT関連因子であるSnailおよびSlugを調節する。
  • SS18::SSXは、重要なEMTマーカーであるE-カドヘリンの発現抑制因子として同定された。

結論:

  • SS18::SSXおよびBRD9は、SySaにおける主要なEMT因子の調節において重要な役割を果たしている。
  • これらの相互作用は、SySaにおける腫瘍表現型および予後の多層的な調節に関する新たな洞察を提供する。
  • これらのメカニズムを理解することは、SySaの新規治療戦略の開発を導く可能性がある。