QS-21 promotes an adjuvant effect allowing for reduced antigen dose during HIV-1 envelope subunit immunization in humans.

Abstract:

:Three separate studies were undertaken in HIV-1 uninfected persons to determine if the adjuvant QS-21 improves the magnitude or kinetics of immune responses induced by recombinant soluble gp120 HIV-1(MN) protein (rsgp120) immunization. The QS-21 was administered at two doses (50 and 100 microg), either alone or in combination with aluminum hydroxide (600 microg). At the highest doses of rsgp120 (100, 300, and 600 microg), QS-21 exerted no significant effect on either binding or neutralizing antibody titers. Antibody binding and neutralizing responses fell dramatically when rsgp120, formulated with alum alone, was given at low doses (3 and 30 microg). In contrast, antibody responses similar in titer to those in the high dose antigen groups were induced with the low dose rsgp120 formulated with QS-21. In addition, the lymphocyte proliferation and delayed type hypersensitivity skin testing were superior in the QS-21 recipients compared with the alum recipients at the low antigen doses. Moderate to severe pain was observed in majority of the volunteers receiving QS-21 formulations, and vasovagal episodes and hypertension were not infrequent. Thus, the use of QS-21 may provide a means to reduce the dose of a soluble protein immunogen.

journal_name

Vaccine

journal_title

Vaccine

authors

Evans TG,McElrath MJ,Matthews T,Montefiori D,Weinhold K,Wolff M,Keefer MC,Kallas EG,Corey L,Gorse GJ,Belshe R,Graham BS,Spearman PW,Schwartz D,Mulligan MJ,Goepfert P,Fast P,Berman P,Powell M,Francis D,NIAID AIDS V

doi

10.1016/s0264-410x(00)00415-1

subject

Has Abstract

pub_date

2001-02-28 00:00:00

pages

2080-91

issue

15-16

eissn

0264-410X

issn

1873-2518

pii

S0264410X00004151

journal_volume

19

pub_type

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