TA1 results in a decreased <i>in vivo</i> inflammatory response upon allogeneic cells challenge.

<p>In immunologically competent mice (Balb/c), TA1 completely abrogates the inflammatory response to allogeneic (C57Bl/6) splenocytes. Shown are the levels of Treg and Teff (Th17) cell levels in the spleen of naïve (N), allogeneic challenged (C) and TA1 treated (± RNase A treatment) mice 5 days post treatment. TA1 was administered 24 hours prior to administration of the allogeneic splenocytes. As noted, the ‘active’ agent of the TA1 preparation on Treg and Teff levels was fully degraded by RNase treatment (<i>Δc/d</i>, respectively). Dashed lines represents naïve resting levels of Treg or Th17 cells while the solid lines denote the mean Treg and Th17 cells of control mice 5 days post transfusion of unmodified, viable, allogeneic splenocytes. Data shown is the mean ± SD of a minimum of 8 mice per group. <b>*</b> Denotes significantly different (p<0.001) from naïve mice. <b>#</b> Denotes significantly different (p<0.001) from TA1 treated mice. <b>Panel C:</b><i>In vivo</i> effects of saline, naive miRNA or TA1-miRNA on Foxp3⁺, CD25⁺ and CD69⁺ T cells in the spleen and brachial lymph node. For ease of comparison, the cross-hatched regions of the TA1 group represent the mean saline values. Cell populations were determined 5 days post treatment with a minimum of 5 animals per treatment group. (*) Indicates significantly (p<0.001) different from saline group in Panels A-B. In Panel C (#) denotes significantly reduced from sample 1 but still significantly (p<0.01) elevated relative to saline group.