PP4 deficiency leads to DNA replication stress that impairs immunoglobulin class switch efficiency and germinal center formation

A team led by Dr. Yu-Wen Su from the Immunology Research Center demonstrated that PP4 is indispensable for preventing DNA replication stress that could interfere with class switch recombination (CSR), thereby promoting antibody switching during the humoral immune response. PP4 is a serine/threonine phosphatase required for immunoglobulin (Ig) VDJ recombination…