Putative role of marginal zone B cells in pathophysiological processes

Capture by Marginal Zone Macrophages Marginal Zone B Cells Regulate Antigen

Cannabinoid receptor 2 positions and retains marginal zone B cells within the splenic marginal zone

Specialized B cells residing in the splenic marginal zone (MZ) continuously survey the blood for antigens and are important for immunity to systemic infections. However, the cues that uniquely attract cells to the MZ have not been defined. Previous work demonstrated that mice deficient in cannabinoid receptor 2 (CB2) have decreased numbers of MZ B cells but it has been unclear whether CB2 regul...

Circulating splenic marginal zone B cells in human

The human peripheral B cell compartment displays a large population of IgMIgDCD27 “memory” B cell carrying a mutated Ig receptor. We show here, by phenotypic analysis, CDR3 spectratyping during a T-independent response and gene expression profiling of the different blood and splenic B cell subsets, that blood IgMIgDCD27 cells correspond to circulating splenic marginal zone B cells. Furthermore,...

Marginal Zone B-cell lymphoma

Extra-nodal MZBCL of MALT type (7% of all NHL) is an indolent disease involving most often the stomach, where it usually follows chronic gastritis due to Helicobacter pylori (HP) infection. The disease may also localize in the lung, the thyroid, the salivary gland, the orbit. Splenic MZBCL (1% of all NHL on histologic samples) usually, though not invariably, presents splenomegaly associated cir...

Rapid response of marginal zone B cells to viral particles.

Marginal zone (MZ) B cells are thought to be responsible for the first wave of Abs against bacterial Ags. In this study, we assessed the in vivo response of MZ B cells in mice immunized with viral particles derived from the RNA phage Qbeta. We found that both follicular (FO) and MZ B cells responded to immunization with viral particles. MZ B cells responded with slightly faster kinetics, but nu...