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QS21 A purified, natural saponin isolated from the soapbark tree Quillaja saponaria Molina with potential immunoadjuvant activity. When co-administered with vaccine peptides, QS21 may increase total antitumoral vaccine-specific antibody responses and cytotoxic T-cell responses. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
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Synonyms: | ![](https://webarchive.library.unt.edu/eot2008/20081010065237im_/http://cancernet.nci.nih.gov/images/spacer.gif) | QS-21 Adjuvant Stimulon QS-21 Adjuvant | | ![](https://webarchive.library.unt.edu/eot2008/20081010065237im_/http://cancernet.nci.nih.gov/images/spacer.gif) | Code names: | ![](https://webarchive.library.unt.edu/eot2008/20081010065237im_/http://cancernet.nci.nih.gov/images/spacer.gif) | NIAID VEU 016 QS-21 | | ![](https://webarchive.library.unt.edu/eot2008/20081010065237im_/http://cancernet.nci.nih.gov/images/spacer.gif) |
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