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. 1982 Jan;79(1):161–165. doi: 10.1073/pnas.79.1.161

A monoclonal antibody specific for mouse dendritic cells.

M C Nussenzweig, R M Steinman, M D Witmer, B Gutchinov
PMCID: PMC345682  PMID: 6948298

Abstract

Dendritic cells (DC) are a small subpopulation of lymphoid cells with distinctive cytologic features, surface properties, and functions. This report describes the DC-specific antibody (Ab) secreted by clone 33DI. Rat spleen cells immune to mouse DC were fused to the P3U myeloma. Hybrid culture supernatants were screened simultaneously against DC, a macrophage (M phi) cell line, and mitogen-stimulated lymphoblasts. 33DI Ab specifically killed 80-90% of DC from spleen and lymph node, but no other leukocytes, including Ia+ and Ia- M phi (Ia, I-region-associated antigen,). Quantitative binding studies with 5H-labeled 33D1 Ab showed that DC had an average of 14,000 binding sites per cell. Binding to DC was inhibited with Fab fragment of 33D1 Ab but not with a panel of other monoclonal antibodies, including anti-Ia Ab. Adherence and flotation procedures that enriched for DC enriched for 3H-labeled 33D1 Ab binding in parallel. 33D1 antigen was not detectable on: M phi from spleen, peritoneal cavity, and blood; three M phi cell lines; lymphocytes; granulocytes; platelets; and erythroid cells. DC continued to express the 33D1 antigen after 4 days in culture, whereas M phi and lymphocytes did not acquire it. Quantitative and autoradiographic studies confirmed that spleen and lymph node suspensions contain less than 1% DC. We conclude that 33D1 Ab detects a stable and specific DC antigen and can be used to monitor DC content in complex lymphoid mixtures.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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