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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Interleukin-7 improves CD4 T-cell reconstitution after autologous CD34 cell transplantation in monkeys.

In mice, interleukin-7 (IL-7) hastens T-cell reconstitution and might cause autoimmune diseases, lymphoma, and osteoporosis. We assessed the effect of IL-7 on T-cell reconstitution and toxicity in baboons that underwent total body irradiation followed by autologous transplantation of marrow CD34 cells. Three baboons received placebo and 3 baboons received recombinant human IL-7 (rhIL-7, 75 microg/kg twice a day subcutaneously) between 6 and 10 weeks after transplantation. The mean increase in blood absolute CD4 T-cell counts was 0.9-fold in the placebo-treated animals versus 9.0-fold in those treated with IL-7 (P =.02). The increase observed in the IL-7-treated animals appeared attributable to peripheral expansion rather than de novo generation. The IL-7-treated animals had greater mean increases in the volumes of the spleen (2.0-fold with placebo versus 4.5-fold with IL-7, P =.02) and lymph nodes (1.8-fold with placebo versus 4.1-fold with IL-7, P =.10) but not the thymus (3.4-fold with placebo versus 1.1-fold with IL-7, P =.18). Side effects of IL-7 included thrombocytopenia and possibly neutropenia and hemolytic anemia. One IL-7-treated animal failed to thrive due to a disease resembling graft-versus-host disease. No animals developed lymphoma. Bone density was not decreased. In conclusion, IL-7 raises CD4 T-cell counts in irradiated primates. It remains to be determined whether this is associated with clinical benefit.[1]

References

  1. Interleukin-7 improves CD4 T-cell reconstitution after autologous CD34 cell transplantation in monkeys. Storek, J., Gillespy, T., Lu, H., Joseph, A., Dawson, M.A., Gough, M., Morris, J., Hackman, R.C., Horn, P.A., Sale, G.E., Andrews, R.G., Maloney, D.G., Kiem, H.P. Blood (2003) [Pubmed]
 
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