Mucin Secretion
Mucin Secretion - Related Videos
11:39
Using Unfixed, Frozen Tissues to Study Natural Mucin Distribution
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Cited by 39 •
2012
Unfixed frozen tissue samples embedded in Optimal Cutting Temperature medium (OCT) can be used to study natural distribution and glycosylation of secreted mucus. In this approach tissue processing is minimal and the natural presentation of glycolipids, mucins and glycan-epitopes is preserved. Tissue sections can be analyzed by immunohistochemistry using fluorescence or chromogenic detection.
09:24
Mucin Agarose Gel Electrophoresis: Western Blotting for High-molecular-weight Glycoproteins
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Cited by 32 •
2016
Mucins are high-molecular-weight glycoconjugates, with size ranging from 0.2 to 200 megadalton (MDa). As a result of their size, mucins do not penetrate conventional polyacrylamide gels and require larger pores for separation. We provide a detailed protocol for mucin agarose gel electrophoresis to assess relative quantification and study polymer assembly.
03:51
Label-Free Neutrophil Separation from Tracheal Secretion Using Spiral Microfluidics Channel
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2025
This video demonstrates separating neutrophils from tracheal secretions using a microfluidic device with spiral channels. The device achieves efficient separation based on cell size by utilizing varying thicknesses and trapezoidal-shaped channels. The interplay between forces results in large neutrophils accumulating near the inner wall while erythrocytes and mucin aggregates remain near the outer wall, ensuring effective neutrophil separation.
10:10
Robotic Duodenum-preserving Total Pancreatic Head Resection for Intraductal Papillary Mucinous Neoplasms
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2026
This protocol presents robotic duodenum-preserving total pancreatic head resection (R-DPPHRt) for intraductal papillary mucinous neoplasms (IPMNs). A video demonstrates the technique in a patient with main duct-IPMN, highlighting its feasibility as a minimally invasive, organ-preserving alternative to pancreaticoduodenectomy.
08:51
Profiling of Permethylated Mucin O-glycans Using Matrix-assisted Laser Desorption/Ionization Time-of-flight Mass Spectrometry
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2025
Here, we present a detailed protocol for the release of O-glycans from mucins, and the subsequent desalting, permethylation, and analysis using MALDI-TOF mass spectrometry.
FAQs
These signals act as triggers that prompt specialized secretory cells to release stored mucin. Mechanical stimulation can reflect physical disturbance, whereas chemical or inflammatory signals indicate changes in the surrounding tissue. By linking environmental conditions to exocytosis, this regulation allows mucus production to increase when epithelial surfaces require additional lubrication, particle trapping, or protection.
Mucin granules provide intracellular storage for the glycoproteins produced by secretory cells, including goblet cells. Packaging mucins before release separates synthesis from secretion and allows cells to respond rapidly when an appropriate signal arrives. Exocytosis then delivers the stored material to the epithelial surface, where it can interact with water and form mucus.
Water enables released mucins to expand and form a hydrated, viscoelastic gel. This physical change is important because the gel can remain on an epithelial surface rather than behaving like a concentrated intracellular material. Its resulting properties support lubrication, help retain tissue hydration, and allow the mucus layer to trap particles and microorganisms.
A study can follow the process from mucin synthesis in specialized secretory cells to intracellular granule packaging, signal-dependent exocytosis, and post-release expansion in water. Examining these stages separately helps distinguish problems in production, storage, release, or gel formation. The sequence is relevant when comparing normal epithelial protection with altered mucus behavior.
The process contributes to epithelial protection in the respiratory, gastrointestinal, and reproductive tracts. In each setting, the resulting mucus can lubricate the surface, help maintain hydration, and trap particles or microorganisms. These functions connect cellular secretion with the broader biology of barrier maintenance across tissues exposed to their surrounding environments.
Changes in mucin production or release can disturb the balance between protection and surface obstruction. Excess or improperly regulated mucus may contribute to airway obstruction, while insufficient or impaired secretion can weaken lubrication, hydration, and host defense. Such alterations are also associated with chronic inflammatory disease, making secretion relevant to both normal biology and pathology.
Mucin secretion supports host defense by creating a hydrated barrier that traps microorganisms and particles before they can move across epithelial surfaces. Inflammatory signals can also stimulate release, linking immune activity with mucus production. If this response becomes altered, mucus may contribute to persistent inflammation or airway obstruction rather than providing balanced protection.