Myc: 大量破壊兵器である
Julie Secombe1, Sarah B Pierce, Robert N Eisenman
1Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.
Cell
|April 16, 2004
まとめ
規制解除されたMyc腫瘍遺伝子の発現は細胞の成長を促しますが,アポトーシスを引き起こす. Myc-過剰発現する細胞におけるこの細胞死を阻害することは癌を促進し,dE2F1はMyc-駆動の過剰増殖を制限する.
科学分野:
- 細胞生物学 細胞生物学
- 発達生物学 発達生物学とは
- がん研究 がん研究
背景:
- Mycの腫瘍遺伝子は,細胞の成長と増殖を調節する.
- Mycによって誘発されたアポトーシスは,通常,増殖のバランスをとります.
- Myc過剰発現細胞におけるアポトーシスの廃止は,がんの進行に寄与する.
研究 の 目的:
- 細胞の競争と臓器の成長の調節におけるMycの役割を調査する.
- Myc.の腫瘍発生可能性を制限する要因を特定する.
- Myc,アポトーシス,がんを結びつけるメカニズムを理解する.
主な方法:
- ドロソフィラ・メラノガスターをモデル生物として利用.
- 翼盤細胞クローンにおけるdMycの遺伝子発現レベルを分析した.
- 成長を調節する経路におけるdE2F1の機能を調査.
主要な成果:
- ドロソフィラのクローンの高いdMyc発現は,超競争と正常な細胞のプログラム細胞死につながる.
- dE2F1は,dMyc.のような成長を妨げる遺伝子によって引き起こされる臓器の過剰増殖を制限する重要な要因として特定されています.
結論:
- 菌糸体駆動細胞の競争とアポトーシスは,組織ホメオスタシスのために重要である.
- dE2F1は,Myc. oncogenicの影響を制限することによって,腫瘍抑制剤として作用します.
- これらの経路を理解することは,がん治療の開発に不可欠です.
関連する概念動画
02:15M-Cdk Drives Transition Into Mitosis
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
02:38Mitogens and the Cell Cycle
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
02:23Abnormal Proliferation
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 daughter...
01:06Induced Pluripotent Stem Cells
Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
Somatic cells are...
Somatic cells are...
01:27Chemical Agents for Microbial Control
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
01:12Bacterial Toxins
Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...