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Influence of a moderate-intensity exercise program on early NK cell immune recovery in pediatric patients after reduced-intensity hematopoietic stem cell transplantation
Chamorro-Vina C, Valentin J, Fernandez L, Gonzalez-Vicent M, Perez-Ruiz M, Lucia A, Culos-Reed SN, Diaz MA, Perez-Martinez A
Integrative Cancer Therapies 2017 Dec;16(4):464-472
clinical trial
6/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

INTRODUCTION: After allogeneic hematopoietic stem cell transplantation (HSCT), NK cell reconstitution, which is crucial for positive outcomes, is dominated by the CD56bright subset with low NK cell cytotoxicity (NKCC) activity. Moderate exercise has been described as a potent NK cell stimulus in adults with cancer. PURPOSE: To determine the effects of a moderate-intensity exercise program on NK cell recovery early after HSCT and the feasibility of this intervention. METHODS: Six children undergoing allogeneic HSCT were randomized to an exercise program (EP) or control (CT) group. The EP group performed a 10-week training combining in-hospital and home-based EP. RESULTS: We observed a significant increase in the posttraining/pretraining ratio of the CD56dim subset (EP 1.27 +/- 0.07; CT 0.99 +/- 0.08; p < 0.005) of the EP group. The ratio of NKCC was 8 times greater in the EP group. CONCLUSION: Data suggest that a moderate-intensity EP program performed early after HSCT is feasible and might redistribute the CD56dim/CD56brigh NK cell subset, improving NKCC. The results are still preliminary and must be interpreted with caution.

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