N-acetylcysteine
N-acetylcysteine - Related Videos
08:58
Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis
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Cited by 18 •
2017
Current treatments of inflammatory bowel diseases (IBD) aim at alleviating disease symptoms but may cause severe side effects. Thus, alternative strategies are being investigated in animal colitis models. Here, we explain how the beneficial effects of diet supplements on clinical IBD signs are analyzed in such a colitis model.
12:21
Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Cited by 1 •
2016
Efficient generation of nonlinear phenomena related to third order optical non-linear susceptibility Χ(3) interactions in triply resonant silica microspheres is presented in this paper. The interactions here reported are: Stimulated Raman Scattering (SRS), and four wave mixing processes comprising Stimulated Anti-stokes Raman Scattering (SARS).
02:44
In Vitro Gut Model to Assess Bacterial Adhesion and Internalization
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2026
Source: Calatayud Arroyo, M., et al. Assessing the Viability of a Synthetic Bacterial Consortium on the In Vitro Gut Host-microbe Interface. J. Vis. Exp. (2018).This video demonstrates an in vitro gut host–microbe model to study bacterial viability. A co-culture of Caco-2 and HT29-MTX cells is incubated with bacteria pre-treated under simulated digestive conditions. Epithelial barrier integrity is assessed using transepithelial electrical resistance, and fractions from the medium, solubilized...
03:28
Fluorescent Probe Imaging Assay: A Technique to Visualize Oxidative Stress in the Reactive Oxygen Species Inducer-Treated Cultured Intestinal Organoid Cells
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2025
This video describes the technique of visualizing oxidative stress in cultured organoids. This work helps in understanding the level of oxidative stress due to ROS accumulation in the various cell types present in an organoid after treatment with different ROS modulators.
09:47
Spotting Cheetahs: Identifying Individuals by Their Footprints
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Cited by 25 •
2016
The cheetah (Acinonyx jubatus) is an iconic, endangered species, but conservation efforts are challenged by habitat shrinkage and conflict with commercial farmers. The footprint identification technique, a robust, accurate and cost-effective image classification system, is a new approach to monitoring cheetahs.
FAQs
N-acetylcysteine acts on disulfide bonds within respiratory mucus. Breaking these bonds disrupts part of the structure that gives mucus its viscosity, making secretions less thick. This change can support mucus clearance when respiratory secretions are difficult to move, linking a chemical action at the mucus level with a practical respiratory-care outcome.
N-acetylcysteine supplies cysteine, which the body uses to synthesize glutathione. Glutathione contributes to antioxidant defenses, so increasing cysteine availability can help replenish this protective capacity when it is impaired or depleted. The mechanism illustrates how providing a biochemical building block can influence cellular protection rather than acting only at the site of mucus.
The mucolytic action occurs directly in respiratory mucus through disruption of disulfide bonds, reducing secretion viscosity. Its antioxidant-related action operates through cysteine provision and glutathione synthesis, supporting the body’s defenses against oxidative stress. These mechanisms are chemically distinct, which explains why the same compound can have relevance in both respiratory care and toxicologic emergencies.
In acetaminophen overdose, N-acetylcysteine helps restore glutathione availability. Replenished glutathione can neutralize NAPQI, the toxic acetaminophen metabolite, thereby helping limit liver injury. The clinical rationale depends on this sequence: NAC provides cysteine, cysteine supports glutathione synthesis, and glutathione contributes to handling the metabolite responsible for toxicity.
The relevant outcome is a reduction in mucus viscosity, because thinner respiratory secretions are more compatible with clearance. This makes the treatment particularly relevant when impaired mucus movement contributes to respiratory-care needs. The mechanism does not simply suppress secretions; it changes their physical properties by disrupting disulfide-linked structure within the mucus.
Beyond its mucolytic use, N-acetylcysteine is clinically relevant when restoring antioxidant defenses is important. Its clearest emergency application is acetaminophen overdose, where glutathione replenishment helps limit liver injury. The overview also places it in selected conditions involving oxidative stress or impaired mucus clearance, so its use spans emergency medicine, respiratory care, and targeted clinical contexts.