ポリグルタミン重複タンパク質によるCaenorhabditis elegansにおける非アポプトシス発育性細胞死亡の制御
Elyse S Blum1, Mary C Abraham, Satoshi Yoshimura
1Laboratory of Developmental Genetics, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
Science (New York, N.Y.)
|February 25, 2012
まとめ
Caenorhabditis elegansのプログラム細胞死には,ポリグルタミン重複タンパク質PQN-41が必要です. SEK-1によって調節されるこの非アポプトシス経路は,発達中の細胞死と神経変性についての洞察を提供します.
科学分野:
- 発達生物学 発達生物学について
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- プログラムされた細胞死は,発達に不可欠です.
- C. elegansのリンカー細胞死は非アポプトティックで,カスパスとは独立しています.
- 非アポプトティックな細胞死メカニズムを理解することは,発達と病気にとって不可欠です.
研究 の 目的:
- リンカー細胞死に関与する遺伝子を特定するために.
- C. elegans.における非アポプトティック細胞死の分子メカニズムを解明する.
主な方法:
- C. elegans.における全ゲノムRNA干渉 (RNAi) スクリーン
- リンカー細胞死におけるpqn-41遺伝子の役割を調査した.
- SEK-1とLIN-29を含む規制経路を分析しました.
主要な成果:
- ポリグルタミン重複タンパク質をコードするpqn-41遺伝子は,リンカー細胞死亡に不可欠です.
- pqn-41は細胞自律的に作用し,リンカー細胞死で発現する.
- SEK-1キナーゼはpqn-41の発現を調節し,LIN-29に並行して細胞死を促進する.
結論:
- PQN-41は,C. elegans.における非アポプトティックなリンカー細胞死の主な媒介である.
- SEK-1経路は,この細胞死プロセスを調節する上で重要な役割を果たします.
- 発見は,メタゾアンの発達と神経変性疾患に関連する非アポプトティック細胞死に関する洞察を提供します.
関連する概念動画
01:24Caspases
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside cells.
02:58Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
01:23Negative Regulator Molecules
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
01:30Overview of Cell Death
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...