関連する実験動画
Updated: Feb 15, 2026

10:06
Imaging Mycobacterium tuberculosis in Mice with Reporter Enzyme Fluorescence
Published on: February 26, 2018
7.8K
ミトコンドリアの局所化されたFABP4は,ミトコンドリアのホメオスタシスを維持することによって,フェロプトーシスに依存したMycobacterium tuberculosisの拡散を阻害する
Tingting Zhao1, Xinyu Hu1, Ju Li1
1State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, College of Basic Medical Sciences, Jilin University, Changchun, China.
まとめ
マイコバクテリウム結核感染症は,ミトコンドリア脂肪酸結合タンパク質4 (FABP4) を抑制し,病原体の拡散を促進します. FABP4の回復はフェロプトーシスを阻害し,細菌の増殖を減少させ,結核の新たな治療目標を提供します.
科学分野:
- 細胞微生物学 細胞微生物学
- 免疫学 免疫学とは
- 病原体と宿主の相互作用
背景:
- マイコバクテリウム結核 (Mycobacterium tuberculosis,Mtb) は,結核を引き起こす細胞内病原体である.
- Mtb感染は,異なる臓器特異の免疫反応を誘発し,そのメカニズムは十分に理解されていません.
- ミトコンドリア機能障害は,Mtbの病原性に関与しています.
研究 の 目的:
- ミトコンドリア脂肪酸結合タンパク質4 (FABP4) のMTB感染における役割を明らかにする.
- Mtb,FABP4,およびフェロプトーシスを結びつける分子メカニズムを調査する.
- 結核に対する潜在的な治療標的としてFABP4を調査する.
主な方法:
- FABP4発現と脂質過酸化を評価するためにMtb感染細胞の分析.
- ミトコンドリアのFABP4.4の遺伝子操作 (過剰発現)
- 反応性酸素種 (ROS),ミトコンドリアの超酸化物,およびフェロプトーシスマーカー (例えばグルタチオンペロキシダゼ4) の測定.
- Mtbの増殖と細胞損傷の評価.
主要な成果:
- Mtb感染はミトコンドリアのFABP4発現を抑制し,脂質過酸化を高め,フェロプトーシスを誘発した.
- ミトコンドリアのFABP4の過剰発現は,MTB誘発によるPGC-1αとUCP2.2のダウンレギュレーションを相殺した.
- FABP4の復元は,ROS,ミトコンドリアの超酸化物,および脂質過酸化を減少させ,Mtbの増殖と細胞損傷を抑制しました.
結論:
- ミトコンドリアのFABP4は,MTB感染に対する宿主の免疫反応を調節する上で重要な役割を果たします.
- FABP4媒介によるフェロプトーシスの調節は,Mtbの病原性を促進する重要なメカニズムです.
- ミトコンドリアのFABP4をターゲットにすることは,結核治療の有望な戦略です.
関連する概念動画
Animal Mitochondrial Genetics
9.3K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
9.3K
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
17.1K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
17.1K
Export of Mitochondrial and Chloroplast Genes
4.2K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
4.2K
The Inner Mitochondrial Membrane
4.8K
The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria. In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
4.8K
Mitochondrial Membranes
17.4K
A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
17.4K
Mitochondrial Protein Sorting
5.8K
Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death. Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
5.8K

