Crystal J.J. Yeo

University of Cambridge, Cambridge, England, United Kingdom

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Publications (2)4.94 Total impact

  • Crystal J.J. Yeo · Andrew L Gilman ·
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    ABSTRACT: Biallelic BRCA2 mutations occur in 2% of patients with Fanconi anemia and are associated with a high risk of acute leukemia at an early age and a poor prognosis. For the first time, we report the use of interleukin-2 to stimulate a graft-versus-leukemia effect and induce complete remission in a patient with BRCA2 Fanconi anemia and refractory acute myelogenous leukemia, suggesting the potential of immunotherapy in this setting. Interleukin-2 was associated with significant infusion-related toxicity.
    Journal of Pediatric Hematology/Oncology 04/2013; 36(2). DOI:10.1097/MPH.0b013e31828e5c56 · 0.90 Impact Factor
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    Crystal J J Yeo · Douglas T Fearon ·
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    ABSTRACT: The T-box transcription factor, T-bet promotes the differentiation of short-lived effector CD8(+) T cells at the expense of central memory cells. How T-bet mediates these effects, and whether they are directly caused by T-bet alone are unknown, because expression of T-bet requires stimulation of the T cell by inflammatory and growth cytokines, which may have T-bet-independent functions involving T-cell differentiation. We developed an in vitro system of ectopic T-bet expression that avoids the effects of inflammatory cytokines to determine which aspects of the T-bet phenotype may be accounted for by T-bet alone. Ectopic T-bet expression by OT-I CD8(+) T cells stimulated by the H2-Kb (SIINFEKL) complex and cultured with 2 ng/mL IL-2 induced a coordinated change in gene expression leading to down-regulation of CD127 and SOCS-1 and up-regulation of CD122 and IL-15 receptor α, switching the cellular survival cytokine from IL-7 to IL-15. T-bet expression and 2 ng/mL IL-2 also led to a capacity for IFN-γ and Fas ligand expression, confirming a role in eliciting these effector functions. Finally, ectopic T-bet promoted the expression of B lymphocyte-induced maturation protein 1 by OT-I cells in the presence of 20 ng/mL IL-2, providing a mechanism for the role of T-bet in driving terminal differentiation in concert with a high level of IL-2 receptor signalling.
    European Journal of Immunology 01/2011; 41(1):60-6. DOI:10.1002/eji.201040873 · 4.03 Impact Factor

Publication Stats

16 Citations
4.94 Total Impact Points


  • 2011-2013
    • University of Cambridge
      • Department of Medicine
      Cambridge, England, United Kingdom