まとめ
脳腫瘍に関与しているニュー腫瘍遺伝子は,EGF受容体と同様のタンパク質をコードする. これは,neuが未知の成長因子の受容体である可能性を示唆し,がん研究を進めています.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- neu腫瘍遺伝子は,ネズミの神経腫瘍および膠芽細胞腫で頻繁に活性化されます.
- ニュー腫瘍遺伝子は,表皮成長因子 (EGF) 受容体遺伝子 (c-erb-B) と関連しているが,それとは異なる.
研究 の 目的:
- ニュー腫瘍遺伝子とそのタンパク質産物について説明します.
- 新遺伝子とEGF受容体との構造的,機能的関係を調査する.
主な方法:
- 変形細胞系から新しい補完的なDNAクローンの分離と配列化.
- 生物学的活動を評価するための焦点形成測定法.
- 配列分析とEGF受容体との比較.
主要な成果:
- 焦点形成活性を持つ新しい補完的なDNAクローンが分離されました.
- ニュークローンのニュクレオチド配列は1,260アミノ酸のトランスメブランタンパク質を予測しています.
- neuタンパク質はEGF受容体と,特にチロシンキナーゼ領域 (80%以上) で,重要な配列同一性を共有しています.
結論:
- neu遺伝子は,EGF受容体と構造的に類似したトランスメブランタンパク質をコードする.
- ニュー遺伝子は,まだ特定されていない成長因子に対する受容体をコードしている可能性が高い.
- これらの発見は,腫瘍遺伝子の活性化と脳腫瘍における潜在的な治療標的に関する洞察を提供します.
関連する概念動画
01:13Enzyme-linked Receptors
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
01:13Enzyme-linked Receptors
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
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...
01:33Cancer-Critical Genes I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
02:38The Ras Gene
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...
Ras is a superfamily...
01:33Cancer-Critical Genes I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...