FGFRに関連する遺伝子ヌーダラケは,平面生物の頭部領域に脳組織を制限する
Francesc Cebrià1, Chiyoko Kobayashi, Yoshihiko Umesono
1Group for Evolutionary Regeneration Biology, Center for Developmental Biology RIKEN Kobe, 2-2-3 Minatojima-minamimachi, Kobe 650-0047, Japan.
Nature
|October 11, 2002
まとめ
プラナリア再生の研究は,組織修復に関する洞察を提供します. ヌーダラケ (ndk) 遺伝子は,線維細胞成長因子のシグナル伝達を調節し,平面生物の胎外脳形成を防ぐ.
科学分野:
- 発達生物学 発達生物学とは
- 再生医学は再生医学である.
- 幹細胞生物学 幹細胞生物学とは
背景:
- 平面性再生は,全能幹細胞 (ネオブラスト) に依存しています.
- 平面再生の理解は,ヒトの組織修復戦略に情報を与えることができます.
- 中枢神経系は,平面生物において再生する重要な器官である.
研究 の 目的:
- 平面的な脳の発達と再生を調節する遺伝子を特定する.
- 線維芽細胞成長因子受容体 (FGFR) のような分子が平面再生における役割を調査する.
- プラナリアンの脳のパターンを制御する分子機構を解明する.
主な方法:
- Dugesia japonica.の遺伝子識別と特徴付けについて
- 遺伝子機能分析のためのRNA干渉 (RNAi).
- ホールマウント in situ ハイブリダイゼーションとXenopus胚アッセイ.
主要な成果:
- 平面頭部で発現するFGFRのような遺伝子であるヌーダラケ (ndk) を特定し,特徴づけました.
- NDK機能のRNAi媒介による喪失は,子宮外脳組織形成を誘発した.
- FGFR1とFGFR2の抑制により,子宮外脳形成が抑制されました.
- ndkは,Xenopus胚におけるFGFシグナル伝達を阻害することが示された.
結論:
- ndk遺伝子は,線維細胞成長因子 (FGF) 信号伝達を調節する.
- NDKは,脳発達を頭部領域に制限する上で重要な役割を果たしています.
- この研究は,再生中の脳のパターンの遺伝的制御に関する洞察を提供します.
さらに関連する動画
05:48Micromanipulation of Gene Expression in the Adult Zebrafish Brain Using Cerebroventricular Microinjection of Morpholino Oligonucleotides
Published on: May 24, 2013
19.4K
08:24Zebrafish In Situ Spinal Cord Preparation for Electrophysiological Recordings from Spinal Sensory and Motor Neurons
Published on: April 18, 2017
11.1K
関連する概念動画
01:30Neurulation
Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...
01:51Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
01:20The Retinoblastoma Gene
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
01:20The Retinoblastoma Gene
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...