関連する実験動画
Updated: Jul 20, 2025

10:21
Studying Murine Small Bowel Mechanosensing of Luminal Particulates
Published on: March 18, 2022
1.9K
PIEZO2は体感覚神経で胃腸経路を制御する
M Rocio Servin-Vences1, Ruby M Lam2, Alize Koolen1
1Department of Neuroscience, Dorris Neuroscience Center, Scripps Research, San Diego, CA, USA; Howard Hughes Medical Institute, Chevy Chase, MD, USA.
Cell
|August 4, 2023
まとめ
PIEZO2タンパク質は 腸内の食物感知や 排泄や消化に不可欠です PIEZO2が欠けているヒトとマウスは腸の感覚と運動能力が低下している.
科学分野:
- 神経科学
- 胃腸内科
- 機械生物学
背景:
- 消化,栄養吸収,廃棄物の排出には 胃腸の動きが不可欠です
- 腸内部のメカニカルセンシングは 胃腸の動きを制御します
- 特定の分子メカニズムと神経経路は,腸内メカノセンセーションに関与していますが,ほとんど不明です.
研究 の 目的:
- 腸内メカノセンセーションの基礎にある分子と神経メカニズムを特定する.
- PIEZO2が胃腸の感覚と運動を調節する役割を調査する.
- 腸内メカノセンセーションの機能的影響を解明する.
主な方法:
- PIEZO2欠乏症の個体における腸の感覚と運動性を評価するためのヒト遺伝子研究.
- ピエゾ2の背骨の根と結節のギャングリアにおける役割を調査するマウスモデル.
- ピエゾ2が結腸膨張と食物輸送率に及ぼす影響を評価するインビボ試験
主要な成果:
- 機能的なPIEZO2が欠けている人は,腸の感覚と運動能力が低下しています.
- ピエゾ2はマウスの背筋の根のに含まれているが,ノドースには含まれていないが,腸の内容を感知するのに不可欠である.
- ピエゾ2欠乏症は,胃,小腸,大腸における食物輸送速度を変化させる.
- ピエゾ2は,腸の膨張を in vivo で検出するために必要である.
結論:
- PIEZO2は胃腸内の重要なメカニセンサで,腸の運動を調節するのに不可欠です.
- この研究は,ピエゾ2を発現する背筋根のギャングリアニューロンを,腸内メカノセンセーションの重要な媒介体として特定している.
- これらの機械感覚経路を理解することで,消化プロセスと運動障害の潜在的な治療目標の洞察が得られます.
関連する概念動画
Enteric Nervous System: Regulation of GI Motor Activity
458
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.
During periods of fasting, the ENS initiates the migrating myoelectric complex, a...
During periods of fasting, the ENS initiates the migrating myoelectric complex, a...
458
Gastric Motility
822
Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...
822
Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists
308
Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
308
Neural Regulation
39.5K
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.
39.5K
Mechanically-gated Ion Channels
6.4K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.4K
Pleiotropy
40.6K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
40.6K

