C/EBPalphaによるE2F抑制は,アディポゲネシスとグラヌロポエシス in vivoのために必要である
1Laboratory of Gene Therapy Research, 2100 Copenhagen Ø, Denmark.
Cell
|October 24, 2001
まとめ
CCAAT/強化剤結合タンパク質アルファ (C/EBPalpha) の転写因子である
科学分野:
- 分子生物学は分子生物学である.
- 細胞の微分化 細胞の微分化
- 遺伝子調節 遺伝子調節
背景:
- C/EBPalphaは,アディポサイトと中性粒細胞の分化のための重要な転写因子です.
- 細胞増殖の制御におけるその役割は,さらなるメカニズム的理解を必要とします.
研究 の 目的:
- C/EBPalphaの機能の基礎となる分子機構を調査する.
- C/EBPalpha媒介による差異化および増殖制御におけるE2F抑制の役割を決定する.
主な方法:
- E2F抑制に欠陥があるC/EBPalpha変異体の特定.
- 細胞増殖とアディポサイト分化のためのインビトロアッセイ.
- マウスの生殖系における標的型変異を対象に,in vivoの機能を評価する.
主要な成果:
- E2F抑制に障害のあるC/EBPalpha変異体は,増殖を抑制し,アディポサイトの微分化を誘導する欠陥を in vitro で示した.
- E2F抑制欠陥C/EBPalphaアレルを持つマウスは,アディポサイトとグラヌロサイトを vivo で区別することができなかった.
- これらの発見は,E2F抑制とC/EBPalphaの差異化誘発能力とを関連付けています.
結論:
- C/EBPalphaによるE2F抑制は,端末分化を引き起こすために不可欠である.
- C/EBPalphaカップルの直接的な細胞サイクル制御により,分化とともに成長が停止する.
- これは,細胞の運命決定に対する系統指示型転写因子制御の遺伝的証拠を提供します.
関連する概念動画
Cell Specific Gene Expression
13.3K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
13.3K
Eukaryotic Transcription Inhibitors
9.1K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
9.1K
Master Transcription Regulators
6.1K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.1K
Erythropoiesis
5.7K
Red blood cells (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia,...
5.7K
General Transcription Factors
5.9K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
5.9K
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
1.8K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
1.8K


