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. 1985 Oct;82(19):6637–6641. doi: 10.1073/pnas.82.19.6637

Purification and characterization of a human tumor necrosis factor from the LuKII cell line.

B Y Rubin, S L Anderson, S A Sullivan, B D Williamson, E A Carswell, L J Old
PMCID: PMC391265  PMID: 3863119

Abstract

A factor with tumor necrosis factor (TNF) activity produced by the LuKII human lymphoblastoid cell line [designated TNF(LuKII)] was purified sequentially by using controlled-pore glass, lentil lectin-Sepharose, and procion red agarose chromatography, yielding TNF with a specific activity of 1.5 X 10(7) units per mg of protein and an isoelectric point of approximately equal to 6.7. Purified TNF(LuKII) fractionated by NaDodSO4/PAGE under reducing as well as nonreducing conditions was found to contain seven protein bands of Mr 80,000, 70,000, 43,000, 25,000, 23,000, 21,000, and 19,000. The proteins of Mr 80,000 and 70,000 could not be dissociated into lower molecular weight components. Peptide mapping analysis and immunoblotting analysis revealed that the seven protein bands in the purified TNF(LuKII) preparations are related. After fractionation of TNF(LuKII) by NaDodSO4/PAGE under reducing conditions, TNF activity was recovered from the regions of Mr 70,000 and 19,000-25,000. Purified human TNF(LuKII) (i) produces hemorrhagic necrosis of Meth A mouse sarcoma in the standard in vivo mouse TNF assay; (ii) has the same pattern of reactivity as mouse TNF (cytotoxic/cytostatic/no effect) on a panel of human cancer cell lines; and (iii) has its anticellular effect potentiated by interferon, also a feature of mouse TNF.

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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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