Paul Ehrlich in 1879. MCs have long been considered'reactive bystanders' and'amplifiers' in
inflammatory processes, allergic reactions, and host responses to infectious diseases.
However, knowledge about the origin, phenotypes and functions of MCs has increased
substantially over the past 50 years. MCs are now known to be derived from multipotent
hematopoietic progenitors, which, through a process of differentiation and maturation, form a …