Abstract:
:In this study, the haemolytic activities of Astragalus membranaceus saponins (AMS) and its adjuvant potentials on the cellular and humoral immune responses of ICR mice against OVA were evaluated. We determined the haemolytic activity of AMS using 0.5% rabbit red blood cell. AMS showed a slight haemolytic effect, with its haemolytic percent being 0.66% at the concentration of 500 microg/ml. Furthermore, the adjuvant potentials of AMS at three dose levels on the cellular and humoral immune responses of ICR mice against ovalbumin (OVA) were investigated. ICR mice were immunized subcutaneously with OVA 100 microg alone or with OVA 100 microg dissolved in saline containing Alum (200 microg), QuilA (10 and 20 microg) or AMS (50, 100 or 200 microg) on Day 1 and 15. Two weeks later (Day 28), concanavalin A (Con A)-, lipopolysaccharide (LPS)- and OVA-stimulated splenocyte proliferation and OVA-specific antibodies in serum were measured. AMS significantly enhanced the Con A-, LPS-, and OVA-induced splenocyte proliferation in the OVA-immunized mice especially at a dose of 100 microg (P<0.05 or P<0.001). OVA-specific IgG, IgG1 and IgG2b antibody titers in serum were also significantly enhanced by AMS compared with OVA control group (P<0.01 or P<0.001). Moreover, no significant differences (P>0.05) were observed between enhancing effect of AMS and QuilA on the OVA-specific IgG, IgG1 and IgG2b antibody responses to OVA in mice. In conclusion, the results suggest that AMS could be safely used as adjuvant with low or non-haemolytic effect.
journal_name
Vaccinejournal_title
Vaccineauthors
Yang ZG,Sun HX,Fang WHdoi
10.1016/j.vaccine.2005.06.016subject
Has Abstractpub_date
2005-10-25 00:00:00pages
5196-203issue
44eissn
0264-410Xissn
1873-2518pii
S0264-410X(05)00604-3journal_volume
23pub_type
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