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Related Concept Videos

Surface Membrane Barriers01:18

Surface Membrane Barriers

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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
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Mucosal Barrier of the Stomach01:25

Mucosal Barrier of the Stomach

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The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
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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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Tissue Membranes01:27

Tissue Membranes

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A tissue membrane is a thin layer of cells that covers the outside of the body, the organs, internal passageways that lead to the exterior of the body, and the lining of the moveable joint cavities. There are two basic types of tissue membranes— connective tissue and epithelial membranes.
Connective Tissue Membranes
The connective tissue membrane is formed solely from connective tissue. These membranes encapsulate organs, such as the kidneys, and line our movable joints. A synovial...
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Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

55
The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more...
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Classification of Epithelial Tissues: Simple Epithelium01:30

Classification of Epithelial Tissues: Simple Epithelium

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Simple epithelium consists of a single layer of cells that lines body cavities and blood vessels. The shape of the cells in the epithelium reflects the function of the tissue. Cells in simple squamous epithelium appear as thin scales with flat, elliptical nuclei that mirror the form of the cell.
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Related Experiment Video

Updated: Apr 30, 2026

Rapid Viscoelastic Characterization of Airway Mucus Using a Benchtop Rheometer
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Rapid Viscoelastic Characterization of Airway Mucus Using a Benchtop Rheometer

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Mucus, it is not just a static barrier.

Grace Y Chen1, Thaddeus S Stappenbeck

  • 11Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan Cancer Center, Ann Arbor, MI 48109, USA.

Science Signaling
|May 1, 2014
PubMed
Summary

The NLRP6 inflammasome pathway activates autophagy, promoting mucus secretion in goblet cells to defend the gut. This discovery reveals how inflammasomes help maintain intestinal homeostasis.

Area of Science:

  • Immunology
  • Cell Biology
  • Gastroenterology

Background:

  • The intestinal mucus layer is crucial for host defense against microbial pathogens.
  • Autophagy is essential for mucus secretion by intestinal goblet cells.
  • Upstream regulators of autophagy in goblet cells remain largely unknown.

Purpose of the Study:

  • To investigate the role of NLRP6 inflammasome in regulating autophagy-dependent mucus secretion.
  • To elucidate the upstream pathways activating autophagy in intestinal goblet cells.

Main Methods:

  • The study likely involved in vitro cell cultures of goblet cells and in vivo models.
  • Techniques may include inflammasome component analysis, autophagy marker detection, and mucus secretion assays.
  • Genetic manipulation of NLRP6 and inflammasome components was probably employed.

More Related Videos

Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging
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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging

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Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
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Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix

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Related Experiment Videos

Last Updated: Apr 30, 2026

Rapid Viscoelastic Characterization of Airway Mucus Using a Benchtop Rheometer
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Rapid Viscoelastic Characterization of Airway Mucus Using a Benchtop Rheometer

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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging
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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging

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Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
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Main Results:

  • NLRP6, a pattern-recognition receptor, was shown to activate the inflammasome pathway.
  • Activation of NLRP6 inflammasome promoted autophagy in goblet cells.
  • This led to enhanced, autophagy-dependent mucus secretion from goblet cells.

Conclusions:

  • NLRP6 inflammasome signaling is a key upstream activator of autophagy in intestinal goblet cells.
  • This pathway plays a significant role in mucus secretion and maintaining intestinal homeostasis.
  • Findings provide a novel mechanism for inflammasome-mediated gut protection.