IgA natural antibodies are produced following T-cell independent B-cell activation following stroke.

IgA natural antibodies are produced following T-cell independent B-cell activation following stroke. Brain Behav Immun. 2020 Sep 18;: Authors: Zbesko JC, Frye JB, Becktel DA, Gerardo DK, Stokes J, Calderon K, Nguyen TV, Bhattacharya D, Doyle KP Abstract Up to 30% of stroke patients experience cognitive decline within one year of their stroke. There are currently no FDA-approved drugs that can prevent post-stroke cognitive decline, in part due to a poor understanding of the mechanisms involved. We have previously demonstrated that a B-lymphocyte response to stroke, marked by IgA+ cells, can cause delayed cognitive dysfunction in mice and that a similar adaptive immune response occurs in the brains of some human stroke patients that suffer from vascular dementia. The stimuli which trigger B-lymphocyte activation following stroke, and their target antigens, are still unknown. Therefore, to learn more about the mechanisms by which B-lymphocytes become activated following stroke we first characterized the temporal kinetics of the B-lymphocyte, T-lymphocyte, and plasma cell (PC) response to stroke in the brain by immunohistochemistry (IHC). We discovered that B-lymphocyte, T-lymphocyte, and plasma cell infiltration within the infarct progressively increases between 2 and 7 weeks after stroke. We then compared the B-lymphocyte response to stroke in WT, MHCII-/-, CD4-/-, and MyD88-/- mice to determine if B-lymphocytes mature into IgA+ PCs th...
Source: Brain, Behavior, and Immunity - Category: Neurology Authors: Tags: Brain Behav Immun Source Type: research