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Testing the NKT cell hypothesis in lenalidomide-treated myelodysplastic syndrome patients

- Chan, Angela, Neeson, Paul, Leeansyah, Edwin, Tainton, K., Quach, Hang, Prince, Henry, Godfrey, Dale, Ritchie, David, Berzins, Stuart

  • Authors: Chan, Angela , Neeson, Paul , Leeansyah, Edwin , Tainton, K. , Quach, Hang , Prince, Henry , Godfrey, Dale , Ritchie, David , Berzins, Stuart
  • Date: 2010
  • Type: Text , Journal article
  • Relation: Leukemia Vol. 24, no. 3 (2010), p. 592-600
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  • Description: Myelodysplastic syndrome (MDS) comprises a group of clonal bone marrow disorders characterized by ineffective hematopoiesis and increased predisposition to acute myeloid leukemia. The causes of MDS remain poorly defined, but several studies have reported the NKT cell compartment of patients with MDS is deficient in number and functionally defective. In support of a central role for NKT cells, a pilot clinical study reported that lenalidomide (an approved treatment for MDS) increased NKT cell numbers in patients with MDS, and several in vitro studies showed lenalidomide specifically promoted NKT cell proliferation and cytokine production. We tested this in a much larger study and confirm a moderate in vitro augmentation of some NKT cell functions by lenalidomide, but find no impact on the NKT cell compartment of patients treated with lenalidomide, despite a consistently positive clinical response. We further show that the frequency and cytokine production of NKT cells is normal in patients with MDS before treatment and remains stable throughout 10 months of lenalidomide therapy. Collectively, our data challenge the concept that NKT cell defects contribute to the development of MDS, and show that a clinical response to lenalidomide is not dependent on modulation of NKT cell frequency or function. © 2010 Macmillan Publishers Limited All rights reserved.

A therapist-assisted cognitive behavior therapy internet intervention for posttraumatic stress disorder: Pre-, post- and 3-month follow-up results from an open trial

- Klein, Britt, Mitchell, Joanna, Abbott, Jo-Anne, Shandley, Kerrie, Austin, David, Gilson, Kathryn, Kiropoulos, Litza, Cannard, Gwenda, Redman, Tomi

  • Authors: Klein, Britt , Mitchell, Joanna , Abbott, Jo-Anne , Shandley, Kerrie , Austin, David , Gilson, Kathryn , Kiropoulos, Litza , Cannard, Gwenda , Redman, Tomi
  • Date: 2010
  • Type: Text , Journal article
  • Relation: Journal of Anxiety Disorders Vol. 24, no. 6 (2010), p. 635-644
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  • Description: This study was an open trial evaluation of a 10-week therapist-assisted cognitive behavior therapy (CBT) internet intervention (PTSD Online) undertaken with people with a primary clinical diagnosis of posttraumatic stress disorder (PTSD) (n= 22) at pre-assessment. Participants were re-assessed at post-assessment and 3-month follow-up. Significant improvements on PTSD severity ratings and related PTSD symptomatology were observed at post-assessment and maintained at 3-month follow-up. At post-assessment, 69.2% of the sample showed clinically significant improvement and 77% of the sample at follow-up assessment. Non-significant, yet improved, change was observed on all other general psychological measures. Overall, treatment satisfaction was good (69%), participant therapeutic alliance ratings were high (87.5%), and the average total therapist time required was 194.5. min. PTSD Online appears to be an efficacious treatment option for people with PTSD that can be provided entirely remotely, with far less therapist time than traditional face-to-face treatment, and without compromising therapeutic alliance. © 2010 Elsevier Ltd.
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