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. 1986 Dec;83(24):9679–9683. doi: 10.1073/pnas.83.24.9679

Purification and NH2-terminal amino acid sequence of a T-cell-derived lymphokine with growth factor activity for B-cell hybridomas.

J Van Snick, S Cayphas, A Vink, C Uyttenhove, P G Coulie, M R Rubira, R J Simpson
PMCID: PMC387204  PMID: 2948184

Abstract

A T-cell-derived lymphokine was identified by its ability to support the growth of a subset of B-cell hybridomas. Hybrids that failed to survive in the absence of this molecule represented a major proportion of rat-mouse hybridomas but were very rare among mouse-mouse B-cell hybrids. Stable factor-dependent B-cell hybridomas were used to monitor the purification of the growth factor from the supernatant of a clonotypically stimulated mouse helper T-cell clone. Sequential fractionation using gel filtration, anion-exchange chromatography, and reversed-phase HPLC resolved the factor from other B-cell growth factors and yielded a single-chain protein characterized by a major charge (pI = 5-7) and molecular mass (22- to 29-kDa) heterogeneity, probably due to variations in glycosylation. The NH2-terminal amino acid sequence of this protein, which is active on B-cell hybridomas in the 0.1 pM range, showed no significant homology with that of known lymphokines. Because the purified factor also supported the growth and survival in vitro of murine plasmacytomas (to be published elsewhere), it was provisionally designated interleukin-HP1 (where H stands for hybridoma and P stands for plasmacytoma).

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Selected References

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