MYC主導のUSP39の起動は,SRSF1の安定性を高め,PDACの進行を促進する
bioRxiv : the preprint server for biology
|September 5, 2025
まとめ
研究者らはMYC,USP39,SRSF1を含む臓がんにおける新たな調節経路を発見した. この軸は重要なタンパク質を安定させ,腫瘍の成長を促進し,臓管腺癌の新たな治療標的となる可能性があります.
科学分野:
- 腫瘍学
- 分子生物学
- 癌 研究
背景:
- 管腺がん (PDAC) は,KRASシグナル伝達によって引き起こされる致命的な癌です.
- スプライシングファクターSRSF1はPDACにおいて決定的であり,その発現レベルは腫瘍形成に影響する.
- SRSF1の調節はプロテオスタシスを含むが,特定のメカニズムは完全に理解されていない.
研究 の 目的:
- PDACにおけるSRSF1の安定性を調節するデウビキチナーゼを特定する.
- 臓がんにおけるSRSF1の制御メカニズムを解明する.
- PDACにおける潜在的な治療目標としてUSP39を調査する.
主な方法:
- USP39をSRSF1と相互作用するデウビキチナーゼとして特定した.
- PDAC腫瘍と患者の生存データにおけるUSP39表現の評価
- PDAC細胞でUSP39ノックダウンとSRSF1過剰発現実験を行った.
- MYCのUSP39の転写制御を調査した.
主要な成果:
- USP39は,SRSF1のユビキチネーションを減少させることで安定させます.
- USP39はPDACで上位調節され,予後不良に関連しています.
- USP39ノックダウンはPDAC細胞の増殖と移動を抑制する.
- MYCは,そのエクソン1bプロモーターを通じてUSP39の転写を直接活性化します.
結論:
- MYC-USP39-SRSF1の規制軸は,PDACにおける転写と翻訳後の制御を統合している.
- USP39はSRSF1を安定させ,KRAS主導のPDACに寄与する.
- USP39は,臓がんに対する有望な治療目標です.
関連する概念動画
Abnormal Proliferation
4.6K
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...
4.6K
Anaphase Promoting Complex
2.9K
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
2.9K
mTOR Signaling and Cancer Progression
3.9K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.9K
DNA Damage can Stall the Cell Cycle
9.3K
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
9.3K
Inhibition of Cdk Activity
4.9K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.9K
PI3K/mTOR/AKT Signaling Pathway
3.9K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.9K


