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Repository corticotrophin injection exerts direct acute effects on human B cell gene expression distinct from the

A L Benko1, C A McAloose2, P M Becker3

  • 1Division of Endocrinology, Diabetes, and Metabolism, The Pennsylvania State University, College of Medicine, Hershey, PA, USA.

Clinical and Experimental Immunology
|December 6, 2017
PubMed

Repository corticotrophin injection (RCI, H.P Acthar® gel) has been approved for use in the management of multiple autoimmune and inflammatory diseases for more than a half-century, but its mechanism of action is not well understood. We used RNA-Seq methods to define RCI-regulated mRNAs in cultured human B cells under conditions of activation by interleukin (IL)-4 and CD40 ligand. Following IL-4/CD40L activation and RCI treatment we found up-regulation of 115 unique mRNA transcripts and down-regulation of 80 unique mRNAs. The effect on these RNA levels was dose-dependent for RCI and was distinct from changes in mRNA expression induced by treatment with a potent synthetic glucocorticoid. RCI down-regulated mRNAs were observed to include a significant over-representation of genes critical for B cell proliferation under activating conditions. These data confirm that RCI exerts direct effects on human B cells to modulate mRNA expression in specific pathways of importance to B cell function and that, at the molecular level, the effects of RCI are distinct from those exerted by glucocorticoids.

Keywords:
B cellantibodiesgene regulationhumanneuroimmunology

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