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Chemokines in the limbal form of vernal keratoconjunctivitis.
Br J Ophthalmol. 2000 Dec; 84(12):1360-6.BJ

Abstract

BACKGROUND/AIMS

Chemokines are a family of low molecular weight cytokines that attract and activate leucocytes. The CC chemokines act on eosinophils, basophils, monocytes, and lymphocytes, suggesting that they play an important part in allergic diseases. The aims of this study were to investigate the expression of the CC chemokines, RANTES, eotaxin, monocyte chemotactic protein (MCP) 1, MCP-2, and MCP-3 in the conjunctiva of patients with vernal keratoconjunctivitis (VKC) and to determine the cellular source of these chemokines.

METHODS

Conjunctival biopsy specimens from nine subjects with active VKC, and six control subjects were studied by immunohistochemical techniques using a panel of monoclonal and polyclonal antibodies directed against RANTES, eotaxin, MCP-1, MCP-2, and MCP-3. The phenotype of inflammatory cells expressing chemokines was examined by sequential double immunohistochemistry.

RESULTS

In the normal conjunctiva, superficial epithelial cells showed a constitutive, weak cytoplasmic expression of eotaxin. Few inflammatory cells in the perivascular areas expressed RANTES, MCP-1, MCP-2, and MCP-3. In VKC specimens, the epithelium showed intense cytoplasmic eotaxin staining in all cells, and cytoplasmic RANTES staining mainly in the superficial layers. Furthermore, RANTES and eotaxin were expressed on the vascular endothelium mainly in the upper substantia propria. Compared with normal controls, VKC specimens showed significantly more inflammatory cells expressing RANTES, eotaxin, MCP-1, and MCP-3 (p<0.001, 0.0028, 0.0092, and <0. 001, respectively). In VKC specimens, the numbers of inflammatory cells expressing RANTES were significantly higher than the numbers of inflammatory cells expressing eotaxin, MCP-1, and MCP-2 (all p values <0.001). Colocalisation studies revealed that the majority of inflammatory cells expressing chemokines were CD68 positive monocytes/macrophages.

CONCLUSIONS

These results demonstrate an increase in the expression of RANTES, eotaxin, MCP-1, and MCP-3 in the conjunctiva of patients with VKC compared with control subjects. These data suggest a potential role for these chemokines in the pathogenesis of VKC. Antagonists of chemokine receptors may provide new therapeutic modalities in VKC.

Authors+Show Affiliations

Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia. abuasrar@KSU.edu.saNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11090473

Citation

Abu El-Asrar, A M., et al. "Chemokines in the Limbal Form of Vernal Keratoconjunctivitis." The British Journal of Ophthalmology, vol. 84, no. 12, 2000, pp. 1360-6.
Abu El-Asrar AM, Struyf S, Al-Kharashi SA, et al. Chemokines in the limbal form of vernal keratoconjunctivitis. Br J Ophthalmol. 2000;84(12):1360-6.
Abu El-Asrar, A. M., Struyf, S., Al-Kharashi, S. A., Missotten, L., Van Damme, J., & Geboes, K. (2000). Chemokines in the limbal form of vernal keratoconjunctivitis. The British Journal of Ophthalmology, 84(12), 1360-6.
Abu El-Asrar AM, et al. Chemokines in the Limbal Form of Vernal Keratoconjunctivitis. Br J Ophthalmol. 2000;84(12):1360-6. PubMed PMID: 11090473.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemokines in the limbal form of vernal keratoconjunctivitis. AU - Abu El-Asrar,A M, AU - Struyf,S, AU - Al-Kharashi,S A, AU - Missotten,L, AU - Van Damme,J, AU - Geboes,K, PY - 2000/11/25/pubmed PY - 2001/2/28/medline PY - 2000/11/25/entrez SP - 1360 EP - 6 JF - The British journal of ophthalmology JO - Br J Ophthalmol VL - 84 IS - 12 N2 - BACKGROUND/AIMS: Chemokines are a family of low molecular weight cytokines that attract and activate leucocytes. The CC chemokines act on eosinophils, basophils, monocytes, and lymphocytes, suggesting that they play an important part in allergic diseases. The aims of this study were to investigate the expression of the CC chemokines, RANTES, eotaxin, monocyte chemotactic protein (MCP) 1, MCP-2, and MCP-3 in the conjunctiva of patients with vernal keratoconjunctivitis (VKC) and to determine the cellular source of these chemokines. METHODS: Conjunctival biopsy specimens from nine subjects with active VKC, and six control subjects were studied by immunohistochemical techniques using a panel of monoclonal and polyclonal antibodies directed against RANTES, eotaxin, MCP-1, MCP-2, and MCP-3. The phenotype of inflammatory cells expressing chemokines was examined by sequential double immunohistochemistry. RESULTS: In the normal conjunctiva, superficial epithelial cells showed a constitutive, weak cytoplasmic expression of eotaxin. Few inflammatory cells in the perivascular areas expressed RANTES, MCP-1, MCP-2, and MCP-3. In VKC specimens, the epithelium showed intense cytoplasmic eotaxin staining in all cells, and cytoplasmic RANTES staining mainly in the superficial layers. Furthermore, RANTES and eotaxin were expressed on the vascular endothelium mainly in the upper substantia propria. Compared with normal controls, VKC specimens showed significantly more inflammatory cells expressing RANTES, eotaxin, MCP-1, and MCP-3 (p<0.001, 0.0028, 0.0092, and <0. 001, respectively). In VKC specimens, the numbers of inflammatory cells expressing RANTES were significantly higher than the numbers of inflammatory cells expressing eotaxin, MCP-1, and MCP-2 (all p values <0.001). Colocalisation studies revealed that the majority of inflammatory cells expressing chemokines were CD68 positive monocytes/macrophages. CONCLUSIONS: These results demonstrate an increase in the expression of RANTES, eotaxin, MCP-1, and MCP-3 in the conjunctiva of patients with VKC compared with control subjects. These data suggest a potential role for these chemokines in the pathogenesis of VKC. Antagonists of chemokine receptors may provide new therapeutic modalities in VKC. SN - 0007-1161 UR - https://www.unboundmedicine.com/medline/citation/11090473/Chemokines_in_the_limbal_form_of_vernal_keratoconjunctivitis_ L2 - http://bjo.bmj.com/cgi/pmidlookup?view=long&amp;pmid=11090473 DB - PRIME DP - Unbound Medicine ER -