A recent study in mice has uncovered the role of a protein, called BMI-1, in chronic viral infections. |
A recent study in mice, conducted by the Monash Biomedicine Discovery Institute (BDI), has uncovered that during chronic viral infection, a protein called BMI-1 gets turned on too early in B cells and messes up the delicate balance of gene expression, resulting in antibodies that are unsuccessful in their endeavor to clear the virus from the body.
However, when this protein is targeted, the nature of the B cell can be changed to produce a higher quality antibody that accelerates clearance of a virus and may provide a new therapeutic pathway to help improve and regulate the body’s antibody response to achieve better outcomes.
The findings have now been published in Nature Immunology.
B cells, a type of white blood cell, respond to infection and can eventually turn into plasma cells. It is the plasma cells that make and secrete antibodies. During an infection, some of the B cells that become activated can quickly become plasma cells and start to produce antibodies in the first few days of the body’s immune response. While these antibodies are helpful, they are typically lower in quality and do not clear the infection. However, they do give the immune system some time to allow other B cells to undergo a "training period" to become high-quality memory B cells and plasma cells for immunity.