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Clinical and Diagnostic Laboratory Immunology, January 2005, p. 192-197, Vol. 12, No. 1
1071-412X/05/$08.00+0     doi:10.1128/CDLI.12.1.192-197.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Visualizing Cytokine-Secreting Cells In Situ in the Rhesus Macaque Model of Chronic Gut Inflammation

Geeta Ramesh,1 Xavier Alvarez,1 Juan T. Borda,1 Pyone P. Aye,1 Andrew A. Lackner,1 and Karol Sestak2*

Divisions of Comparative Pathology,1 Microbiology and Immunology, Tulane National Primate Research Center and Tulane University Health Science Center, Covington, Louisiana2

Received 16 July 2004/ Returned for modification 2 September 2004/ Accepted 14 September 2004

Cytokine-producing cells in gut-associated lymphoid tissues of rhesus macaques with chronic enterocolitis were studied. The confocal microscopy technique that we developed enables simultaneous in situ visualization of multiple extra- and/or intracellular antigens at a resolution higher than that allowed by light or epifluorescence microscopy. The presence of interleukin-6 (IL-6)-, tumor necrosis factor alpha (TNF-{alpha})-, and IL-1-{alpha}-producing cells was focally intense in the colon lamina propria of the affected animals. The IL-1-{alpha}-producing cells were T lymphocytes (CD3+), while the TNF-{alpha}-producing cells were both macrophages (CD68+/HAM56+/LN5+) and T lymphocytes (CD3+). The IL-6-producing cells within the colon consisted of T lymphocytes and macrophages. The amount of IL-6-producing cells seen in macaques with enterocolitis was significantly higher (P < 0.001) than that seen in the healthy control animal, while TNF-{alpha}- and IL-1-{alpha}-producing cells were seen only in macaques with enterocolitis. Most of the T lymphocytes that produced cytokines were detected in the lamina propria, while the macrophages were most prominent in highly inflamed regions of the lamina propria. Taken together, our findings indicate that there might be immunological similarity between chronic enterocolitis of rhesus macaques and humans, suggesting the potential use of the nonhuman primate model for the validation of novel therapies.

* Corresponding author. Mailing address: Division of Microbiology and Immunology, Tulane National Primate Research Center, 18703 Three Rivers Rd., Covington, LA 70433. Phone: (985) 871-6409. Fax: (985) 871-6371. E-mail: ksestak{at}tulane.edu.

Clinical and Diagnostic Laboratory Immunology, January 2005, p. 192-197, Vol. 12, No. 1
1071-412X/05/$08.00+0     doi:10.1128/CDLI.12.1.192-197.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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