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Derivation
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The DB cell line was established by Walter J. Urba and Dan L. Longo from ascites fluid from a patient with a diffuse large cell lymphoma.
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Antigen Expression
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CD19 +; CD20 +; CD22 +; Hle-1 +; CD21 -; CD25 -
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Genes Expressed
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CD19 +; CD20 +; CD22 +; Hle-1 +; CD21 -; CD25 -
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Comments
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The cells do not express HLA-DR, HLA-DQ, IgM , IgD or T cell rantigen receptor.
Exposure of DB cells to phorbol esters (PMA or PdBu) that activate protein kinase C results in profound growth inhibition.
They are reported to be negative for the Epstein-Barr virus genome.
The cells were cured of a prior mycoplasma contamination by a 21 day treatment with BM-cycline.
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