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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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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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The enteral drug administration involves three primary routes: oral, sublingual, and buccal. Oral ingestion is the most prevalent, safe, economical, and convenient method for drug administration. However, it has certain drawbacks, including limited absorption due to the drug's low water solubility or poor membrane permeability, possible emesis from GI mucosa irritation, destruction of drugs by digestive enzymes or low gastric pH, and irregular absorption along with food or other drugs.
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In Situ Ca2+ Imaging of the Enteric Nervous System
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Interoception: The enteric nervous system enters the chat.

Kelly L Buchanan1, Rachel L Wolfson1

  • 1Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA; Division of Gastroenterology, Massachusetts General Hospital, Boston, MA 02114, USA.

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|February 3, 2026
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Summary
This summary is machine-generated.

Intrinsic enteric neurons, typically regulating gut functions, may also initiate interoceptive signals. This challenges the traditional view that only dorsal root ganglia sensory neurons handle gut sensory information.

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Area of Science:

  • Neuroscience
  • Gastroenterology
  • Visceral Sensation

Background:

  • Intrinsic enteric neurons (ENs) control gut functions like motility, secretion, and absorption.
  • Extrinsic dorsal root ganglia (DRG) sensory neurons are primarily recognized for mediating colon interoception and visceral pain perception.

Purpose of the Study:

  • To investigate the potential role of enteric neurons in initiating interoceptive signals within the colon.
  • To explore an alternative origin for visceral sensory information beyond dorsal root ganglia.

Main Methods:

  • The study likely involved in vivo or in vitro models of the enteric nervous system.
  • Electrophysiological recordings or neuronal tracing techniques may have been employed to assess neuronal activity and connectivity.

Main Results:

  • Preliminary findings suggest that enteric neurons might contribute to the initial processing of interoceptive signals.
  • This indicates a potential overlap or novel function for ENs in sensory pathways.

Conclusions:

  • Enteric neurons could play a more significant role in gut interoception than previously understood.
  • This research opens new avenues for understanding visceral sensation and pain mechanisms.