title: Native versus recombinant high-mobility group B1 proteins: functional activity in vitro.
abstract: To compare the functional activity of native HMGB1 proteins from eukaryotic sources with HMGB1 from prokaryotic sources the cDNAs of human and murine HMGB1 were cloned and the proteins expressed in bacteria. Tissue-derived HMGB1 from calf thymus and HMGB1 secreted from Chinese hamster ovary (CHO) cells were purified. Human whole blood, THP-1 cells, and NIH/3T3 cells were exposed to HMGB1 proteins and the induction of tumor necrosis factor-alpha (TNF-alpha) release in whole blood and monocytic THP-1 cells and a proliferation assay in NIH/3T3 cells were used to study functional activity of HMGB1s in vitro. Native and recombinant HMGB1s induced TNF-alpha release in human blood and in THP-1 cells dose-dependently, but recombinant HMGB1s were more effective. Cell proliferation was induced by native and recombinant HMGB1s. The native HMGB1 proteins from eukaryotic sources exert the same (though less pronounced) biological activity in vitro as recombinant HMGB1 proteins from prokaryotic sources.
authors.affiliation: Baxter BioScience, Industriestrasse 72, 1220 Vienna, Austria.
authors.forename: Klaus
authors.initials: K
authors.lastname: Zimmermann
authors.forename: Dirk
authors.initials: D
authors.lastname: Völkel
authors.forename: Sabrina
authors.initials: S
authors.lastname: Pable
authors.forename: Thomas
authors.initials: T
authors.lastname: Lindner
authors.forename: Franziska
authors.initials: F
authors.lastname: Kramberger
authors.forename: Soheyl
authors.initials: S
authors.lastname: Bahrami
authors.forename: Friedrich
authors.initials: F
authors.lastname: Scheiflinger
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D016466:CHO Cells; D002417:Cattle; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D006224:Cricetinae; D005822:Genetic Vectors; D024243:HMGB1 Protein / Q000037:antagonists & inhibitors / Q000302:isolation & purification / Q000502:physiology*; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D041681:NIH 3T3 Cells; D011773:Pyruvates / Q000494:pharmacology; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000302:isolation & purification / Q000494:pharmacology; D011994:Recombinant Proteins / Q000235:genetics / Q000302:isolation & purification / Q000494:pharmacology*; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors / Q000378:metabolism
chemical_list: D024243:HMGB1 Protein; D011773:Pyruvates; D011993:Recombinant Fusion Proteins; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; C046522:ethyl pyruvate