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American Journal of Pathology, Vol 135, 421-425, Copyright © 1989 by American Society for Investigative Pathology

REGULAR ARTICLES

In vivo immunohistochemical identification of tumor necrosis factor/cachectin in human lymphoid tissue

JL McCall, K Yun, S Funamoto and BR Parry
Department of Surgery, Otago University Medical School, Dunedin, New Zealand.

To find an alternative approach to the in vivo detection of tumor necrosis factor/cachectin (TNF alpha), an immunohistochemical method to identify TNF alpha in histologic sections was developed. This method employs the streptavidin-biotin immunoperoxidase technique, and TNF alpha-specific monoclonal and polyclonal antibodies, on cryostat sections of fresh frozen human lymphoid tissue. Staining was evident in most specimens displaying follicular hyperplasia, but was absent from histologically normal tissue. Both tingible body macrophages and follicular dendritic reticulum cells appeared from phenotype analysis in serial sections and by double staining experiments to constitute the main source of TNF alpha. This technique complements other systemically oriented assays that may fail to detect significant in vivo TNF alpha production and activity at a cellular level.


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A. Corcione, L. Ottonello, G. Tortolina, P. Tasso, F. Ghiotto, I. Airoldi, G. Taborelli, F. Malavasi, F. Dallegri, and V. Pistoia
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[Abstract] [Full Text] [PDF]


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Copyright © 1989 by the American Society for Investigative Pathology.