Maturation and trafficking markers on rotavirus-specific B cells during acute infection and convalescence in children

MC Jaimes, OL Rojas, EJ Kunkel, NH Lazarus… - Journal of …, 2004 - Am Soc Microbiol
MC Jaimes, OL Rojas, EJ Kunkel, NH Lazarus, D Soler, EC Butcher, D Bass, J Angel
Journal of virology, 2004Am Soc Microbiol
We have previously studied B cells, from people and mice, that express rotavirus-specific
surface immunoglobulin (RV-sIg) by flow cytometry with recombinant virus-like particles that
contain green fluorescent protein. In the present study we characterized circulating B cells
with RV-sIg in children with acute and convalescent infection. During acute infection,
circulating RV-sIgD− B cells are predominantly large, CD38high, CD27high, CD138+/−,
CCR6−, α4β7+, CCR9+, CCR10+, cutaneous lymphocyte antigen-negative (CLA−), L …
Abstract
We have previously studied B cells, from people and mice, that express rotavirus-specific surface immunoglobulin (RV-sIg) by flow cytometry with recombinant virus-like particles that contain green fluorescent protein. In the present study we characterized circulating B cells with RV-sIg in children with acute and convalescent infection. During acute infection, circulating RV-sIgD B cells are predominantly large, CD38high, CD27high, CD138+/−, CCR6, α4β7+, CCR9+, CCR10+, cutaneous lymphocyte antigen-negative (CLA), L-selectinint/−, and sIgM+, sIgG, sIgA+/− lymphocytes. This phenotype likely corresponds to gut-targeted plasma cells and plasmablasts. During convalescence the phenotype switches to small and large lymphocytes, CD38int/−, CD27int/−, CCR6+, α4β7+/−, CCR9+/− and CCR10, most likely representing RV-specific memory B cells with both gut and systemic trafficking profiles. Of note, during acute RV infection both total and RV-specific murine IgM and IgA antibody-secreting cells migrate efficiently to CCL28 (the CCR10 ligand) and to a lesser extent to CCL25 (the CCR9 ligand). Our results show that CCR10 and CCR9 can be expressed on IgM as well as IgA antibody-secreting cells in response to acute intestinal infection, likely helping target these cells to the gut. However, these intestinal infection-induced plasmablasts lack the CLA homing receptor for skin, consistent with mechanisms of differential CCR10 participation in skin T versus intestinal plasma cell homing. Interestingly, RV memory cells generally lack CCR9 and CCR10 and instead express CCR6, which may enable recruitment to diverse epithelial sites of inflammation.
American Society for Microbiology