関連する実験動画
Updated: Jul 25, 2026

07:54
A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice
Published on: July 25, 2017
腸内の共生宿主-微生物関係の分子分析
L V Hooper1, M H Wong, A Thelin
1Department of Molecular Biology and Pharmacology, Washington University School of Medicine, St. Louis, MO 63110, USA.
まとめ
腸内細菌であるBacteroides thetaiotaomicronは,腸内遺伝子発現を調節することにより,宿主の生理に大きく影響します. この研究は,宿主の健康と機能を維持する際に居住微生物が果たす重要な役割を強調しています.
科学分野:
- 微生物学 微生物学とは
- 胃腸内科 胃腸内科
- ホスト-マイクロバイオームの相互作用
背景:
- 人間の腸内微生物群は,複雑な微生物コミュニティで構成されています.
- 寄生細菌が宿主体に与える生理学的影響は完全に理解されていません.
研究 の 目的:
- 主要な腸内細菌であるバクテロイドス (Bacteroides thetaiotaomicron) が宿主の生理にどのように影響するか調査する.
- この共生微生物によって調節される特定の腸機能を特定するために.
主な方法:
- 細菌のないマウスをバクテロイドス (Bacteroides thetaiotaomicron) とコロニー化する.
- DNAマイクロアレイを用いたグローバル腸内遺伝子発現分析.
- レーザー捕捉マイクロ解剖による応答の細胞局所化.
主要な成果:
- バクテロイドス・テテオタオマイクロンのコロニー化は宿主の遺伝子発現を調節した.
- 影響を受ける主要な腸機能には,栄養素の吸収と粘膜壁の強化が含まれます.
- このバクテリアはまた,異種生物の代謝,血管新生,腸の成熟にも影響した.
結論:
- Bacteroides thetaiotaomicronのような共生細菌は,宿主の生理を形作る上で重要な役割を果たしています.
- 微生物の相互作用は,腸の健康と機能の維持に不可欠です.
- この研究は,腸内微生物が宿主に影響を与えるメカニズムについての洞察を提供します.
さらに関連する動画
関連する概念動画
Mechanical and Chemical Digestion in the Small Intestine
The small intestine plays a crucial role in our digestive system, performing both mechanical and chemical digestion.
Mechanical digestion in the small intestine involves movements such as segmentations and migrating motility complexes (MMCs), primarily controlled by the myenteric plexus. Segmentations are localized contractions occurring in areas of the intestine distended by chyme—a mixture of partially digested food. These contractions mix chyme with digestive juices, facilitating absorption...
Mechanical digestion in the small intestine involves movements such as segmentations and migrating motility complexes (MMCs), primarily controlled by the myenteric plexus. Segmentations are localized contractions occurring in areas of the intestine distended by chyme—a mixture of partially digested food. These contractions mix chyme with digestive juices, facilitating absorption...
Introduction to the Human Microbiota
Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
Microbiota of the Stomach and Small Intestine
The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
Microbiota of the Large Intestine
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
Microbiota Modulation by Antibiotics
Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...

