Toward a better definition of hematopoietic progenitors suitable for B cell differentiation.

Dubois, Florian; Gaignerie, Anne; Flippe, Léa; Heslan, Jean-Marie; Tesson, Laurent; Chesneau, Mélanie; Haspot, Fabienne; Conchon, Sophie et al. · PLoS One · 2020

basic_science · Level V

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Abstract

The success of inducing human pluripotent stem cells (hIPSC) offers new opportunities for cell-based therapy. Since B cells exert roles as effector and as regulator of immune responses in different clinical settings, we were interested in generating B cells from hIPSC. We differentiated human embryonic stem cells (hESC) and hIPSC into B cells onto OP9 and MS-5 stromal cells successively. We overcame issues in generating CD34+CD43+ hematopoietic progenitors with appropriate cytokine conditions and emphasized the difficulties to generate proper hematopoietic progenitors. We highlight CD31intCD45int phenotype as a possible marker of hematopoietic progenitors suitable for B cell differentiation. Defining precisely proper lymphoid progenitors will improve the study of their lineage commitment and the signals needed during the in vitro process.

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