細胞特異的,活性化可能,およびセラノスティックプロドラッグは,双重標的がんイメージングと治療のためのものです
Santimukul Santra1, Charalambos Kaittanis, Oscar J Santiesteban
1NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, Florida 32816, USA.
Journal of the American Chemical Society
|September 14, 2011
まとめ
研究者らは,細胞に入るまで不活性である新しい葉酸-ドクソルビシン結合体を開発した. 細胞内では,グルタチオンはコンジュガートを活性化し,光性を高め,癌細胞を殺害します. この標的型プロドラッグアプローチは,薬剤の投与と有効性を改善します.
科学分野:
- 薬用化学 薬用化学について
- バイオコンジュガーション 化学 化学
- 癌の治療薬について
背景:
- 葉酸受容体は,様々ながん細胞に過剰発現し,薬物投与の魅力的な標的になります.
- ドクソルビシンは強力な化学療法薬ですが,その有効性は全身の毒性および薬剤耐性によって制限されています.
- プロドラッグ戦略は,薬物ターゲティングを改善し,オフターゲットの影響を軽減することができます.
研究 の 目的:
- 活性化可能な光と細胞毒性を持つ新しい葉酸-ドクソルビシン結合体を設計・合成する.
- 結合剤の活性化と細胞の吸収のメカニズムを調査する.
- 癌治療における活性化コンジュガートの治療の可能性を評価する.
主な方法:
- ディスルファイドリンクナーを用いた葉酸ドクソルビシン結合体の合成.
- 光と細胞毒性を含む結合物質の性質のインビトロ特性.
- 葉酸受容体を発現するがん細胞系を用いた細胞吸収および活性化研究.
- コンジュガートの有効性をin vitroで評価する.
主要な成果:
- 葉酸-ドクソルビシンコンジュガートは,無傷状態で光が消し去られ,細胞毒性が示された.
- ガン細胞内では,グルタチオン媒介のディスルフィード結合割れによってコンジュガート活性化が観察されました.
- 活性化コンジュガートは,核転移が観察された,強化された光と強力な細胞毒性を示した.
- 標的の投与と活性化により,フリードクソルビシンと比較して,がん細胞の殺戮が著しく改善されました.
結論:
- 活性化可能な光と細胞毒性を持つ新しい葉酸-ドクソルビシン前薬結合体が成功裏に合成されました.
- ディスルファイドリンクナーは,細胞内グルタチオンによるがん細胞内の標的型活性化を可能にします.
- この活性化可能な前薬剤戦略は,有効性を高め,副作用を軽減した標的がん治療の有望なアプローチを提供します.
関連する概念動画
Targeted Cancer Therapies
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
There are several types of targeted therapies against specific...
Targeted Cancer Therapies
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
There are several types of targeted therapies against specific...
Modified-Release Drug Delivery Systems: Site-Targeted
Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
Combination Therapies and Personalized Medicine
Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Tumor Immunotherapy
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.


