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Related Experiment Video

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Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

Warthin-starry silver method showing particulate matter in macrophage.

Hong-Gang Liu¹

¹Department of Pathology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China. liuhg1125@163.com

Biomedical and Environmental Sciences : BES

|May 16, 2008

Summary

The Warthin-Starry (WS) silver stain effectively detects air particulate matter (PM) within macrophages, outperforming standard hematoxylin and eosin (HE) staining for visualizing these particles in lung tissue.

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Area of Science:

Pathology
Toxicology
Materials Science

Background:

Macrophages play a crucial role in clearing inhaled particulate matter (PM).
Accurate visualization of PM within macrophages is essential for understanding PM-related lung pathology.
Traditional staining methods like HE may not adequately detect fine PM within cells.

Purpose of the Study:

To evaluate the efficacy of the Warthin-Starry (WS) silver stain in detecting in situ air particulate matter (PM) within macrophages.
To compare the sensitivity of WS staining against hematoxylin and eosin (HE) staining for PM detection.

Main Methods:

Autopsy samples from 26 cases (cerebral hemorrhage, silicosis, fetal death) were analyzed.
Serial sections of lung and lymph nodes were stained using HE, WS silver, and CD68 immunohistochemistry.
Transmission electron microscopy (TEM) and X-ray spectrum analysis (X-RSA) were used to characterize PM in WS-positive samples.

Main Results:

WS staining clearly identified larger and fine PM within macrophages ("dust cells") in silicosis and hemorrhage groups.
HE staining showed limited detection of fine PM compared to WS staining.
CD68 staining confirmed "dust cells" as macrophages, and TEM/X-RSA verified the particles as PM.

Conclusions:

Warthin-Starry (WS) silver staining is superior to HE staining for visualizing particulate matter within macrophages.
WS staining provides enhanced sensitivity for detecting inhaled PM in lung tissues.