癌細胞のフェロプトーシスを,一酸化炭素に汚染されたヘモグロビンで促進する
Meifang Wang1, Wenying Zhang1, Bin Liu1
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
Journal of the American Chemical Society
|May 7, 2025
まとめ
この研究では,カルボキシヘモグロビン (HbCO) を使用して制御可能なナノプラットフォームを導入し,がん細胞のフェロプトーシスを誘導します. プラットフォーム
科学分野:
- 生物医学工学
- ナノテクノロジー
- 癌 療法
背景:
- Fe-N部位を持つペロキシダース (POD) のようなナノ酵素は,がんフェロプトーシスに希望を示しています.
- 生物分解性ヘモグロビン (Hb) は潜在的ナノ酵素ですが,その制御不能な活動は安全性の問題です.
研究 の 目的:
- 癌フェロプトーシス誘導の強化のための制御可能で生物分解可能な触媒ナノプラットフォームを開発する.
- 精密腫瘍治療のためのナノ酵素の"OFF/ON"活性調節を調査する.
主な方法:
- カーボキシヘモグロビン (HbCO) とプラチナ (IV) プロドラグを dendritic mesoporous organosilica nanoparticles (DMON) に統合する.
- HbCOのPODのような活性をin situで再活性化するために,H2O2駆動のヘム鉄バレンスの調節を使用する.
- 脂質過酸化とフェロプトーシス誘導による in vitroおよびin vivo有効性の評価
主要な成果:
- DPHCOナノプラットフォームはFe-Nサイトを一時的に無効化することで制御された触媒活性を示した.
- 再活性化されたHbと放出されたCOは,脂質過酸化と癌細胞のフェロプトーシスを誘発した.
- シスプラチンとの相乗効果は治療効果をさらに高めました.
結論:
- ガス改変と鉄のバレンスの調節は,ナノ酵素の活性を制御する実行可能なアプローチを提供します.
- この戦略は 精密な癌治療のための 先進的なナノ酵素の開発に 刺激を与えています
関連する概念動画
01:16Necrosis
3.9K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
3.9K
02:53Adaptive Mechanisms in Cancer Cells
5.7K
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,...
5.7K
01:27Oxygen Transport in the Blood
2.4K
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
2.4K
01:46Electron Transport Chain: Complex I and II
10.0K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
10.0K
02:49Cancer Therapies
7.5K
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
7.5K
01:23Hypoxia
857
Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
857