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関連する概念動画

Bacterial Flora of the Large Intestine01:29

Bacterial Flora of the Large Intestine

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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.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
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Physiology of Enteric Nervous System and Gut Health01:05

Physiology of Enteric Nervous System and Gut Health

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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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Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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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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Pathophysiology of Peptic Ulcer Disease: Injurious Factors01:22

Pathophysiology of Peptic Ulcer Disease: Injurious Factors

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Peptic ulcers are sores on the stomach's inner lining and the upper small intestine, which are the result of disruptions in the mucosal layer that houses parietal cells which produce gastric acid, and chief cells which secrete pepsinogen.
In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds...
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Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

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Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
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An Intestinal Gut Organ Culture System for Analyzing Host-Microbiota Interactions
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腸内細菌と宿主との間の基本的な病理学的相互作用の概要

Mathilde Simonson1,2, Thomas Simonson3, Estelle Nobécourt1,2

  • 1Department of Endocrinology, Diabetes and Nutrition, GHSR, Centre Hospitalo-Universitaire de la Réunion, Saint-Pierre, La Réunion, France.

Frontiers in nutrition
|August 28, 2025
PubMed
まとめ

腸内微生物群 (GMB) は 宿主遺伝子を調節する代謝物質に 繊維を分解することで 消化と免疫を助けます GMBの変異は病気に関連しており,健康における重要な役割を強調しています.

キーワード:
胆酸遺伝子調節腸内微生物群炎症メタボライト栄養について小鎖脂肪酸

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Assessing the Viability of a Synthetic Bacterial Consortium on the In Vitro Gut Host-microbe Interface
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科学分野:

  • 微生物学
  • 人間の生理学
  • メタボロミクス

背景:

  • 人間の腸内微生物群 (GMB) には,宿主の生理学にとって重要な多数の細菌種が含まれています.
  • コメンサル菌は食物繊維を代謝し 化学的および信号伝達機能の二重な化合物を産生します
  • GMBは腸の障壁を維持し,宿主の免疫系を調節する役割を果たします.

研究 の 目的:

  • 腸内細菌と宿主の相互作用の基本的メカニズムを見直す
  • 腸内細菌の代謝産物の宿主遺伝子調節と恒常性における役割を調査する.
  • 微生物の組成,ディスバイオシス,免疫調節の関係を調べる.

主な方法:

  • GMBと宿主との相互作用に関する最近の重要な論文の文献レビュー.
  • 腸内細菌,その代謝産物,そして宿主遺伝子発現への影響に注目してください.
  • 微生物の組成,腸内ホメオスタシス,免疫反応の分析

主要な成果:

  • 腸内細菌の代謝産物は 化学薬品とシグナル分子の両方として作用します
  • メタボリットは宿主遺伝子の発現に影響を与え,生理学とホメオスタシスに影響を与えます.
  • 腸内微生物の組成とその変化 (ディスバイオシス) は,様々な病理と関連しています.

結論:

  • GMBは人間の健康に不可欠であり,代謝,免疫,腸のバリア機能に影響を与えます.
  • GMBと宿主メタボリットの相互作用を理解することは,GMB関連の疾患に対処する上で鍵となる.
  • メタボライト化学と宿主遺伝子の調節に関するさらなる研究が必要である.