新血管系への標的遺伝子配送による腫瘍回帰
John D Hood1, Mark Bednarski, Ricardo Frausto
1Department of Immunology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
まとめ
研究者らは,腫瘍の血管に遺伝子を送り込み,腫瘍の成長を停止させるための標的型ナノ粒子を開発した. この新しい遺伝子療法アプローチは,内皮細胞を選択的に標的とし,マウスの腫瘍細胞死亡と持続的な腫瘍回帰を引き起こします.
科学分野:
- バイオメディカルエンジニアリング
- 腫瘍学 腫瘍学
- 血管生物学 血管生物学
背景:
- 病気の血管への遺伝子配送は,特定の標的ベクトルの欠如のために困難です.
- 病気の組織,特に腫瘍の内皮細胞は,抗がん治療の重要な標的である.
研究 の 目的:
- 血管新生性血管の内皮細胞のための標的型遺伝子配送システムを開発する.
- 腫瘍血管新生を阻害し,腫瘍の回帰を誘発するために,変異したRaf遺伝子 (ATPmu-Raf) を提供するナノ粒子の治療の可能性を評価する.
主な方法:
- カチオンナノ粒子 (NP) は,選択的配送のためにインテグリンアルファベータ3-ターゲティングリガンドと結合された.
- NPsは,内皮信号伝達と血管新生を阻害するATPmu-Raf遺伝子と結合された.
- 効果を評価するために,標的のNPを腫瘍を持つマウスに全身注射した.
主要な成果:
- 標的のNPは,選択的に腫瘍における血管新生性血管に遺伝子を送達した.
- NPsの注射は,腫瘍に関連した内皮細胞のアポトーシスを引き起こした.
- その結果,腫瘍細胞のアポプトーシスと,原発性および転移性腫瘍の持続的な回帰が起こりました.
結論:
- 標的型ナノ粒子は,腫瘍の血管系を選択的に攻撃することによって,がんにおける遺伝子療法の有望な戦略を提供します.
- 遺伝子配送による内皮細胞信号伝達の抑制は,腫瘍の成長と転移を効果的に抑制することができます.
- このアプローチは,確立した腫瘍の治療に重要な治療の可能性を示しています.
関連する概念動画
Tumor Progression
Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Adaptive Mechanisms in Cancer Cells
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Metastasis
Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Cancer Stem Cells and Tumor Maintenance
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Stem Cell Therapy for Tissue Regeneration
Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell types that...
Types of Stem Cells used in Stem Cell Therapy
The two main cell types that...
Bone Marrow Sampling and Transplants
Bone marrow transplant is a potential cure for several diseases, including cancer and specific genetic disorders. Notably, this procedure is applicable for patients suffering from aplastic anemia, certain types of leukemia, severe combined immunodeficiency disease (SCID), Hodgkin's disease, non-Hodgkin's lymphoma, multiple myeloma, thalassemia, sickle-cell disease, and certain cancers.
The transplant begins with high doses of chemotherapy and radiation treatment, which aim to destroy the...
The transplant begins with high doses of chemotherapy and radiation treatment, which aim to destroy the...


