遺伝子キャリアは,がん細胞のシグナル伝達に対するオール・オア・ノー反応を示している
Riki Toita1, Jeong-Hun Kang, Tetsuro Tomiyama
1Graduate School of Systems Life Sciences, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
Journal of the American Chemical Society
|August 28, 2012
まとめ
研究者らは,標的型遺伝子治療のための新しい線形ポリエチレニミン (LPEI) -ペプチド結合ナノキャリアを開発しました. このナノキャリアは,タンパク質キナーゼCα (PKCα) 活性に反応することによって,がん特異のトランスゲン発現を可能にします.
科学分野:
- バイオテクノロジー バイオテクノロジー
- ナノテクノロジー ナノテクノロジー
- 分子生物学は分子生物学である.
背景:
- 遺伝子療法は,がん治療において有望だが,標的を絞った投与システムが必要である.
- 効率的でがん特異なナノキャリアの開発は依然として課題です.
研究 の 目的:
- 癌特異のトランスゲン発現のための新しいナノキャリアを設計し,合成する.
- ナノキャリアの安定性,反応性,ターゲティング効率を in vitroおよび in vivoで評価する.
主な方法:
- 線形ポリエチレニミン (LPEI) -ペプチド結合体は,クリック化学を用いて合成されました.
- ポリプレックスは,プラズミドDNA (pDNA) で形成され,細胞溶解酸の安定性をテストしました.
- タンパク質キナーゼCα (PKCα) によってリン酸化されたポリプレクスの解離が調査されました.
- PKCα活性に対するトランスゲン発現は,in vitroで分析された.
- 癌組織特異的なトランスゲン発現は,in vivoで評価されました.
主要な成果:
- LPEI-ペプチド結合体が成功して合成され,pDNAで安定したポリプレックスが形成されました.
- ポリプレックスはPKCα媒介のリン酸化によって制御された解離を示した.
- PKCα活性に対するオール・オア・ノー反応は,トランスゲン発現において観察された.
- 癌特異のトランスゲン発現は,PKCα活性が低い腫瘍で達成されました.
結論:
- LPEI-ペプチド結合体は,標的遺伝子配送のための応答性ナノキャリアとして機能します.
- このナノキャリア・システムは,がんを標的とした遺伝子治療の応用において,大きな可能性を秘めている.
さらに関連する動画
10:13A Multiplexed Luciferase-based Screening Platform for Interrogating Cancer-associated Signal Transduction in Cultured Cells
Published on: July 3, 2013
09:56A Nonviral Approach to Generate Transient Chimeric Antigen Receptor T Cells Using mRNA for Cancer Immunotherapy
Published on: February 21, 2025
関連する概念動画
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...
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...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
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...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
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...
01:19Interactions Between Signaling Pathways
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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...