Spike as a superantigen

Superantigen theory notes

https://sci-hub.se/https://doi.org/10.1016/0882-4010(87)90003-9 - In the TMEV virus, inbred mice can be more susceptible or more resistant to the virus.

HPV Gardasil vaccine

https://www.nature.com/articles/srep36943 - This Japanese group demonstrated an animal model for the HPV vaccine using pertussis toxin to skew the autoimmunity towards neurological phenotypes that include low responsiveness of the tail reflex and locomotive mobility. They compared HPV + pertussis to MOG (myelin oligodendrocyte glycoprotein) antigen + pertussis toxin.

Kawasaki disease (similar to MIS-C)

https://sci-hub.se/10.1097/00001432-199506000-00005 - This 1995 links superantigens from S. Aureus and group A streptococci to staphlococcal and streptococcal toxic shock syndrome, Kawasaki syndrome, and the chronic diseases arthritis, guttate psoriasis, and atopic dermatitis.

SARS-CoV-2 spike protein

https://www.nature.com/articles/s41422-021-00495-9 - SARS COV 2 spike protein activates TLR4 and acts as a superantigen

https://www.mdpi.com/2073-4409/11/16/2526 - Unlike SEB, the SARS-CoV-2 spike does not exhibit an intrinsic superantigen-like activity (!!!).

TLR4

https://pubmed.ncbi.nlm.nih.gov/12799214/ - LPS is used in Experimental autoimmune thyroiditis (EAT) model. LPS and Freund's adjuvant behave differently.

https://pubmed.ncbi.nlm.nih.gov/18203139/ - !!! The TLR4 pathway seems to regulate the priming of Th17 cells and reduce the severity of EAE.

https://pubmed.ncbi.nlm.nih.gov/19211042/ - "TLR4 down regulates disease severity in EAE and Th17 cell responses"

https://pubmed.ncbi.nlm.nih.gov/21685327/ - This study had conflicting results. TLR4 knockout mice had the same susceptibility to experimental autoimmune encephalomyelitis (EAE).

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1375233/ - TLR4 ligands include LPS, Taxol

https://jitc.biomedcentral.com/articles/10.1186/s40425-019-0625-x - LPS is used to treat cancer as a TLR4 ligand / vaccine adjuvant.

http://www.worldcat.org/title/1051926526 - LPS and Freund's are used in the livestock industry for a commercial purpose (???measuring vaccine response???)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3064511/ - Review of TLRs (Toll-like receptors) in Multiple Sclerosis / experimental autoimmune encephalomyelitis (EAE)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2327198/ - Bacterial LPS acts as an adjuvant to induce autoimmune arthritis in mice. LPS enhances MRL/lpr nephritis, experimental autoimmune uveitis, experimental autoimmune myocarditis and experimental autoimmune enterocolitis.

Complete Freund's adjuvant

https://pubmed.ncbi.nlm.nih.gov/2139617/ - a single injection of complete Freund's adjuvant (CFA) given at an early age (5 wk) prevented the appearance of diabetes and greatly increased the life span of NOD mice without additional therapy

https://pubmed.ncbi.nlm.nih.gov/8436836/ - The BCG vaccine (or a single injection of CFA) protected mice against diabetes. However, immunosuppression via the chemo drug cyclophosphamide could induce disease in 'protected' mice.

EAE - Experimental Allergic Encephalomyelitis / Experimental Autoimmune Encephalomyelitis

https://oxfordrecoverycenter.com/wp-content/uploads/2017/02/Ameliorating-Effects-of-Hyperbaric-oxygenation-on-Experimental-Allergic-Encephalomyelitis.pdf - HBOT was successful in pushing EAE (experimental allergic encephalomyelitis) into remission. CFA (complete freund's adjuvant) with guinea pig spinal cord.

Myocarditis

https://onlinelibrary.wiley.com/doi/full/10.1002/iid3.155 - Autoimmune myocarditis model, CFA / TiterMax Gold Adjuvant + myocarditogenic peptides in male mice

https://pubmed.ncbi.nlm.nih.gov/31005592/ - Leonurine alleviates LPS-induced myocarditis through suppressing the NF-кB signaling pathway

Experimental autoimmune models

• Myocarditis
• Arthritis
• Encephalomyelitis / Multiple sclerosis
• Enterocolitis
• Uveitis
• Nephritis
• Non-obese diabetic / Type 1 diabetes

Researchers

• Bhagirath Singh - Department of Microbiology and Immunology, University of Western Ontario, London, Ontario N6A 5C1, Canada - publication on NOD mice given CFA and BCG vaccine. Funded by Canadian government grants.

Treatments

THC

• https://sci-hub.se/10.1016/0165-5728(89)90075-1 - THC for multiple sclerosis / experimental autoimmune encephalomyelitis (EAE).