found that IgG (p=0.012) and IgM (p=0.014) anti-MAA-HSA antibodies were associated with alveolar bone loss in RA patients, associations that were not observed in those with OA (40), suggesting that immune responses to MAA could play a possible pathogenic role in mediating bone loss in the context of RA. Here, CD40LG is linked to rheumatoid arthritis.