title: Cytokine-Stimulating (In Vitro) Effect on Human Monocytes of Conjugates of Soluble Curdlan and Albumin Microbeads.
abstract: Four kinds of conjugates (BSA-M-SC-Ra, BSA-M-SC-Re, AP-M-SC-Ra, and AP-M-SC-Re) composed of soluble fragments of [β](1 ± 3)-D-glucan (SC) and bovine serum albumin (BSA) or amine-modifled polystyrene (AP) microbeads were prepared: the contents of SC on the microbeads were found to be 13.6, 8.0, 3.6, and 2.6 μg per 1 X 10(8) microbeads, respectively. Unconjugated BSA and AP microbeads and SC did not show cytokine-stimulating activity. BSA-M-SC-Re, BSA-M-SC-Ra, and AP-M-SC-Re showed strong cytokine-stimulating activity in vitro, indicating that conjugates composed of inactive fragments of polysaccharides and microbeads are able to induce cytokine release from mononuclear phagocytes. Conjugates with the SC linked to BSA microbeads by the reducing terminal (BSA-M-SC-Re) showed a stronger effect than conjugates in which SC was linked with BSA microbeads at random positions (BSA-M-SC-Ra).
authors.affiliation: a Department of Experimental Biology, IMB, University of Tromsø, Tromsø, Norway, and Academy of Chinese Traditional Medicine and Material Medica of Jilin Province, People's Republic of China.
authors.forename: Q
authors.initials: Q
authors.lastname: Gao
authors.affiliation: b Department of Experimental Pathology, IMB, University of Tromsø, Tromsø, Norway.
authors.forename: G
authors.initials: G
authors.lastname: Berntzen
authors.affiliation: b Department of Experimental Pathology, IMB, University of Tromsø, Tromsø, Norway.
authors.forename: M K
authors.initials: MK
authors.lastname: Killie
authors.affiliation: b Department of Experimental Pathology, IMB, University of Tromsø, Tromsø, Norway.
authors.forename: R
authors.initials: R
authors.lastname: Seljelid
keywords: Albumin; Conjugate; Cytokine-Stimulating Activity; Glu-can; Microbead