Abstract
Aims To evaluate the involvement of multipotential stem and progenitor cells in the pathogenesis of pterygium.
Methods Paraffin-embedded and snap-frozen primary pterygium (n=10) were serially sectioned and analysed immunohistochemically to determine the expression level of AC133 (marker for the primitive haematopoietic progenitors), CD34 (marker for the haematopoietic progenitor cells and endothelium), c-Kit (marker for haematopoietic and stromal progenitor cells), and STRO-1 (a differentiation antigen present on bone marrow fibroblast cells and on various nonhaematopoietic progenitor cells).
Results In all the primary pterygium, immunoreactivity of AC133 and STRO-1 was found in some of the epithelial and stromal cells, CD34 was observed in the vascular endothelium, and some scattered ovoidal cells were found in the subepithelial connective tissue. C-Kit was expressed mainly in the basal epithelium of the head portions, and some spindle-shaped stromal cells. There is no immunoreactivity of AC133, c-Kit, and STRO-1 in normal conjunctiva, whereas CD34 was mildly stained with vessel wall.
Conclusion Multipotential stem and progenitor cells may be involved in the pathogenesis of pterygium through its differentiation into fibroblasts and vascular endothelial cells.
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Acknowledgements
This research was supported by research funds (code: stem cell 13) from Stem Cell Research Center of the 21C frontier research program funded by the Ministry of Science & Technology, Republic of Korea.
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The paper was presented in 2003 ARVO (1331/B227).
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Ye, J., Song, Y., Kang, S. et al. Involvement of bone marrow-derived stem and progenitor cells in the pathogenesis of pterygium. Eye 18, 839–843 (2004). https://doi.org/10.1038/sj.eye.6701346
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DOI: https://doi.org/10.1038/sj.eye.6701346
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