エンジニアリングプロバイオティクスの代謝ハイジャック 腫瘍代謝と自己強化光動力免疫療法のための免疫マイクロ環境の再プログラム
Shurong Qin1,2, Qi Wang3, Zhuangwei Zhang4
1Department of Gastric and Hernia Surgery, Nanjing Drum Tower Hospital, College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, China.
Journal of the American Chemical Society
|October 8, 2025
まとめ
この研究は,グリシンを枯渇させ,強化光動力免疫療法 (PDT) のための光敏感剤を生成する新しいナノ粒子-細菌システムを導入します. このアプローチは,腫瘍代謝と免疫反応を再プログラムすることで,抗腫瘍免疫と成長抑制を高めます.
科学分野:
- 生物医学工学
- ガン 治療
- 免疫学
背景:
- 腫瘍の代謝再プログラムが 癌の進行と免疫回避に 極めて重要です
- 現在の光ダイナミック・免疫療法 (PDT) の戦略では,代謝障害と免疫活性化との間の連携が欠けている.
- 強化されたがん治療のための統合システムの開発は大きな課題です.
研究 の 目的:
- 合成光力学免疫療法のためのハイブリッドアップコンバージョンナノ粒子 (UCNP) - 細菌システムを設計する.
- 代謝障害と免疫活性化を調整することで,自己強化の治療効果を達成する.
- 標的の代謝再プログラムと免疫刺激により抗腫瘍効果を高める.
主な方法:
- 5アミノレブリン酸 (PpIX前駆体) を合成し,唯一の炭素源としてグリシンを使用する *E. coli* プロバイオティクスを設計した.
- 細菌とmiRNA-21への標的結合のためのG4-ヘアピンとアプタマーを持つUCNP-DNAハイブリッドシステムを開発した.
- 微流体チップスクリーニングを使用して,グリシン減少とPpIX濃縮の為の細菌機能の最適化.
主要な成果:
- UCNP-バクテリアシステムは腫瘍のグリシンを効果的に減らし,プロトポルフィリンIX (PpIX) を生成した.
- グリシン減少は腫瘍のリドックスホメオスタシスを破壊し,光敏感剤生成と光ダイナミック療法 (PDT) の有効性を高めました.
- このシステムは,ROS媒介の免疫細胞死,デンドリット細胞活性化,M1マクロファージの極化を促進し,有意な抗腫瘍効果と転移の減少につながった.
結論:
- 設計されたUCNP-バクテリアのハイブリッドシステムは,自己強化光力学免疫療法のための新しい戦略を提供します.
- この二重代謝アプローチは,腫瘍の微小環境を効果的に再プログラムし,免疫細胞死を促進し,腫瘍の成長と転移を抑制します.
- この統合システムは 代謝調節と免疫療法を組み合わせることで 癌治療の進歩に期待されています
関連する概念動画
Tumor Immunotherapy
1.7K
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.
1.7K
Targeted Cancer Therapies
8.6K
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...
There are several types of targeted therapies against...
8.6K
The Tumor Microenvironment
7.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
7.6K
Microorganisms in Medicine and Therapeutics
960
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
960
Combination Therapies and Personalized Medicine
5.9K
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...
5.9K


