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Glycogen depletion can increase the specificity of mucin detection in airway tissues
Journal article   Open access   Peer reviewed

Glycogen depletion can increase the specificity of mucin detection in airway tissues

David K Meyerholz, Amanda P Beck, J Adam Goeken, Mariah R Leidinger, Georgina K Ofori-Amanfo, Hannah C Brown, Thomas R Businga, David A Stoltz, Leah R Reznikov and Heather A Flaherty
BMC research notes, Vol.11(1), pp.763-763
10/25/2018
DOI: 10.1186/s13104-018-3855-y
PMCID: PMC6203197
PMID: 30359291
url
https://doi.org/10.1186/s13104-018-3855-yView
Published (Version of record) Open Access

Abstract

Mucin is an important parameter for detection and assessment in studies of airway disease including asthma and cystic fibrosis. Histochemical techniques are often used to evaluate mucin in tissues sections. Periodic acid Schiff (PAS) is a common technique to detect neutral mucins in tissue, but this technique also detects other tissue components including cellular glycogen. We tested whether depletion of glycogen, a common cellular constituent, could impact the detection of mucin in the surface epithelium of the trachea. Normal tissues stained by PAS had significantly more staining than serial sections of glycogen-depleted tissue with PAS staining (i.e. dPAS technique) based on both quantitative analysis and semiquantitative scores. Most of the excess stain by the PAS technique was detected in ciliated cells adjacent to goblet cells. We also compared normal tissues using the Alcian blue technique, which does not have reported glycogen staining, with the dPAS technique. These groups had similar amounts of staining consistent with a high degree of mucin specificity. Our results suggest that when using PAS techniques to stain airways, the dPAS approach is preferred as it enhances the specificity for airway mucin.
Periodic acid Schiff (PAS) Specificity Diastase-periodic acid Schiff (dPAS) Mucin Glycogen Staining Nonspecific staining Scoring Mucus Alcian blue

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