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Med Sci Sports Exerc. 2022 Feb 01;54(2):197-205. doi: 10.1249/MSS.0000000000002783.

Myokine Expression and Tumor-Suppressive Effect of Serum after 12 wk of Exercise in Prostate Cancer Patients on ADT.

Medicine and science in sports and exercise

Jin-Soo Kim, Rebekah L Wilson, Dennis R Taaffe, Daniel A Galvão, Elin Gray, Robert U Newton

PMID: 34559721 DOI: 10.1249/MSS.0000000000002783

Abstract

PURPOSE: Although several mechanisms have been proposed for the tumor-suppressive effect of exercise, little attention has been given to myokines, even though skeletal muscle is heavily recruited during exercise resulting in myokine surges. We measured resting serum myokine levels before and after an exercise-based intervention and the effect of this serum on prostate cancer cell growth.

METHODS: Ten prostate cancer patients undertaking androgen deprivation therapy (age, 73.3 ± 5.6 yr) undertook a 12-wk exercise-based intervention including supervised resistance training, self-directed aerobic exercise, and protein supplementation. Body composition was assessed by dual-energy x-ray absorptiometry and muscle strength by the one-repetition maximum method. Fasting blood was collected at baseline and postintervention, and serum levels of myokines-secreted protein acidic and rich in cysteine, oncostatin M (OSM), decorin, insulin-like growth factor-1, and insulin-like growth factor binding protein-3 (IGFBP-3)-were measured. The growth of the prostate cancer cell line DU145 with baseline and postintervention serum was measured.

RESULTS: Body weight (P = 0.011), fat mass (P = 0.012), and percent body fat (P = 0.033) were reduced, whereas percent lean mass (P = 0.001) increased, as did strength (leg press, P = 0.006; chest press, P = 0.020) across the intervention. Serum OSM levels (P = 0.020) and relative serum OSM levels (P = 0.020) increased compared with baseline. A significant reduction in DU145 Cell Index (P = 0.012) and growth rate (P = 0.012) was observed after applying postintervention serum compared with baseline serum.

CONCLUSIONS: This study provides evidence for enhanced myokine expression and tumor-suppressive effects of serum from chronically exercise-trained prostate cancer patients on androgen deprivation therapy.

Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American College of Sports Medicine.

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