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Mass cells in ocular tissues of normal rats and rats infected with Nippostrongylus brasiliensis
Abstract:
In orbital exenteration specimens from 14 rats, 93% of the mast cells were found in the lids, the limbus, and the conjunctiva, 5% in the orbital tissues, and less than 1% in the globe. The density of mast cells was highest in lid (2843/mm3), limbus (2822/mm3), and orbit (2184/mm3) and lowest in bulbar conjunctiva (794/mm3), ciliary body (512/mm3), and sclera (176/mm3). There was no significant difference in the distribution or density of mast cells in orbital exenteration specimens from normal rats compared with rats infected with the worm Nippostrongylus brasiliensis. We concluded that certain ocular structures are rich in mast cells, which suggests that these structures might be susceptible to injury mediated by mast cell products.
Insights
Mast cells are concentrated in rat ocular structures like the eyelids and conjunctiva. Their distribution was similar in normal and infected rats, suggesting these areas may be vulnerable to mast cell-related damage.
Area of Science:
- Ophthalmology
- Immunology
- Histology
Background:
- Mast cells play a role in immune responses and inflammation.
- Understanding mast cell distribution in ocular tissues is crucial for diagnosing and treating eye conditions.
Purpose of the Study:
- To investigate the distribution and density of mast cells in rat ocular tissues.
- To compare mast cell distribution in normal versus Nippostrongylus brasiliensis-infected rats.
Main Methods:
- Analysis of orbital exenteration specimens from 14 rats.
- Quantification of mast cell presence and density in various ocular structures.
Main Results:
- 93% of mast cells were located in the eyelids, limbus, and conjunctiva.
- Highest mast cell densities were observed in the eyelid, limbus, and orbit.
- No significant differences in mast cell distribution or density were found between normal and infected rats.
Conclusions:
- Specific ocular structures, including the eyelids and conjunctiva, are rich in mast cells.
- These mast cell-rich ocular regions may be susceptible to injury mediated by mast cell products.