Science Library Category:

Adjuvants (Aluminum, Squalene, etc.)

Published: 2018
SYNOPSIS

Aluminum adjuvants in vaccines produce toxic effects ranging from benign to fatal, depending on the physicochemical properties of the adjuvant and the physiological response of the vaccine recipient.

TITLE

Unraveling the enigma: elucidating the relationship between the physicochemical properties of aluminium-based adjuvants and their immunological mechanisms of action

CITATION

Shardlow E, Mold M, Exley C. Unraveling the enigma: elucidating the relationship between the physicochemical properties of aluminium-based adjuvants and their immunological mechanisms of action. Allergy Asthma & Clinical Immunology 2018;14:80.

SUMMARY

The two types of aluminum salts commonly used as adjuvants in vaccines are chemically and biologically dissimilar and may play distinct roles in vaccine-related adverse events. Understanding their physicochemical properties—within the physiological environment of the injection site—can help explain their role in adverse events. The authors suggest that “some degree of toxicity and cell death is probably inevitable” following injection of aluminum salts, but they note that the type of iatrogenic effect observed may “range from benign to fatal” depending on the properties of the specific adjuvant “and, critically, the physiological response of the recipient.” Pointing out that aluminum-based adjuvants have never received approval for intramuscular or subcutaneous injection into humans, the researchers call for evaluation of their safety “independently of their presence in vaccine formulations.”

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Published: 2017
SYNOPSIS

Aluminum adjuvants promote brain inflammation, and males appear to be more susceptible to aluminum’s toxic effects.

TITLE

Subcutaneous injections of aluminum at vaccine adjuvant levels activate innate immune genes in mouse brain that are homologous with biomarkers of autism

CITATION

Li D, Tomljenovic L, Li Y, Shaw CA. Journal of Inorganic Biochemistry. 2017;177:39–54.

SUMMARY

Autism manifests in early childhood, during a window of early developmental vulnerability where the normal developmental trajectory is most susceptible to xenobiotic insults. Aluminum (Al) vaccine adjuvants are xenobiotics with immunostimulating and neurotoxic properties to which infants worldwide are routinely exposed. This research found that aluminum triggered innate immune system activation and altered neurotransmitter activity in male mice, observations which are consistent with those in autism. Female mice were less susceptible to aluminum as the frontal cortex was the most affected area in males and the cerebellum in females. These findings suggest that aluminum adjuvants promote brain inflammation and that males appear to be more susceptible to aluminum′s toxic effects. (Note: This study has since been retracted by the Journal of Inorganic Biochemistry, but the importance of the topic prompted our decision to keep it in our science library.)

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