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関連する概念動画

Anatomy of the Intestines01:23

Anatomy of the Intestines

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Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
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Physiology of Enteric Nervous System and Gut Health01:05

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The gastrointestinal tract, responsible for the digestion and absorption of nutrients, is safeguarded by the intestinal barrier, which consists of secretory, physical, and immune components. At the forefront is the secretory barrier, composed of essential elements such as mucus, gut microbiota, and defense proteins. They collaborate to break down food particles, facilitate nutrient absorption, and maintain optimal gut health. These secretory components ensure the smooth functioning of the...
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Enteric Nervous System: Regulation of GI Motor Activity01:11

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The Enteric Nervous System (ENS) plays a pivotal role in regulating gastrointestinal or GI motor activity. This complex network of nerves, deeply embedded within the gut wall, responds to changes in the gut environment and receives input from both the autonomic nervous system and the central nervous system. By doing so, the ENS operates various programs tailored to the body's nutritional status and needs.
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Neural Regulation01:37

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Bacterial Flora of the Large Intestine01:29

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The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
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Digestive activity regulation hinges on three primary components. Activation is prompted by a multitude of mechanical and chemical indicators, primarily detected by receptors within the stomach and intestines' walls. These receptors predominantly respond to factors such as mechanical stretching of the organ walls, changes in pH and osmolarity, and the presence of digesting materials and their by-products.
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微生物群 の 神経 プログラム が 腸 体 の 生理 を 調節 する

Yuuki Obata1, Álvaro Castaño2, Stefan Boeing2

  • 1The Francis Crick Institute, London, UK. Yuuki.Obata@crick.ac.uk.

Nature
|February 7, 2020
PubMed
まとめ
この要約は機械生成です。

アリル炭化水素受容体 (AHR) は腸内ニューロンの腸内センサーとして作用し,微生物の信号と腸内運動を結びつける. この発見は 消化器の健康と ホメオスタシスを維持する 重要なメカニズムを明らかにしています

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科学分野:

  • 神経科学
  • 胃腸内科
  • 分子生物学

背景:

  • 腸内臓の神経制御は健康に不可欠で 消化と防御に不可欠です
  • 腸の運動の不調は胃腸疾患ではよく見られるが,光因子と神経制御を結びつける分子メカニズムは不明である.

研究 の 目的:

  • アリル炭化水素受容体 (AHR) が腸内微生物群と腸内神経回路との間の分子リンクとしての役割を調査する.
  • 腸内ニューロンのAHRシグナリングが腸の運動性とホメオスタシスにどのように影響するか解明する.

主な方法:

  • 異なる腸部と微生物群のマウス腸内ニューロンの核RNAシーケンス.
  • マウスモデルにおけるAHRとその調節体CYP1A1の遺伝子操作
  • AHRの調節と抗生物質治療に対する腸内ペリスタルティック活動評価

主要な成果:

  • 大腸の腸内ニューロンは 宿主遺伝と微生物の植民によって 独特の転写プロファイルを示します
  • 微生物群によって誘発されるAHR発現は,腸内ニューロンに光環境を感知し,エフェクタメカニズムを活性化させます.
  • ニューロン特異的なAHRの消去またはCYP1A1の過剰発現は,微生物群の枯渇状態を模倣した結腸内静脈を減少させた.
  • 腸の運動が部分的に回復した抗生物質を投与されたマウスの腸内ニューロンのAHR発現を回復させる.

結論:

  • アリル炭化水素受容体 (AHR) は,腸内神経回路における重要なバイオセンサとして機能し,腸の機能と微生物信号を統合する.
  • 腸内ニューロンのAHRシグナリングは,腸内ホメオスタシスと運動性を維持するための重要な規制ノードを表します.
  • AHR経路をターゲットにすることで,運動機能不全を特徴とする胃腸疾患の治療戦略を提供することができます.