QS21 is a plant extract that may improve the ability of the immune system to respond to disease. It is derived from the South American tree Quillaja saponaria Molina.The extract is a water soluble triterpene glucoside compound. It forms part of a family of plant-based compounds called saponins.
It is currently being tested as an adjuvant in various vaccines in attempts to improve their efficacy. It is believed to enhance both humoral and cell-mediated immunity.
QS21 is currently under clinical evaluation as an additive for various trial vaccines, including those for HIVThe Human immunodeficiency virus HIV is a frequently mutating retrovirus that attacks the human immune system and which has been shown to cause acquired immune deficiency syndrome (AIDS). History HIV was discovered and identified as the agent for AIDS by, malariaMalaria ( Italian: bad air ; formerly called ague or marsh fever in English) is an infectious disease which causes about 500 million infections and 2 million deaths annually, mainly in the tropics and sub-Saharan Africa. The protozoan cause of malaria was and cancerFor other meanings of Cancer: see Cancer (disambiguation . apoptosis; cancer cells, however, avoid apoptosis. Cancer is a group of related diseases characterized by uncontrolled cell division. Currently, it is believed that cancers arise from both genetic. As of 2002, it had been tested in more than 3000 patients in 60 clinical trialIn medicine, a clinical trial (synonyms: clinical studies, research protocols, medical research) is a research study. Types of clinical trial The most commonly performed clinical trials evaluate new drugs or medical therapies to patients in strictly sciens.
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Quillaja saponins
