AS04

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Adjuvant System 04 or AS04 is a trade name for a combination of adjuvants used in various vaccine products by GlaxoSmithKline, [1] in particular the Fendrix [2] hepatitis B vaccine and Cervarix [3] human papillomavirus (HPV) vaccine. It consists of aluminium hydroxide and monophosphoryl lipid A (MPL). It is the successor of AS03, a squalene based adjuvant used in H1N1/09 and H5N1 influenza vaccines. [4] [5] [6] [7]

Contents

Efficacy and safety

HPV vaccines

Studies on an AS04-adjuvanted HPV-16/18 vaccine showed a high and sustained immune response to HPV antigens after injection, including in patients receiving subsequent doses. [8] [9] [10] Immune response was enhanced by the MPL component which triggered local NF-kB and cytokine production, leading to increased activation of antigen-presenting cells. [11] Immune response duration was extended by the aluminium hydroxide component. The HPV-16/18 AS04-adjuvanted vaccine showed enhanced efficacy compared to an aluminium salt-adjuvanted formulation, with a higher level of antibodies subsequently detected in the body. [12]

Long-term studies appear to show an adequate efficacy and safety profile. [13] [14]

Hepatitis B vaccines

AS04-adjuvanted HBV vaccines may be relevant for patients that are non-responsive to other HBV vaccines, [15] including those with immunodeficiency. [16] [17] [18] [19] [20] [21]

See also

Related Research Articles

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References

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