Physical exercise effects on metastasis: a systematic review and meta-analysis in animal cancer models

Autor: Carmen Fiuza-Luces, Asunción Martín-Ruiz, Alejandro Lucia, Alejandro Santos-Lozano, Pedro L. Valenzuela, Manuel Ramírez, Javier S. Morales, Cecilia Rincón-Castanedo
Rok vydání: 2020
Předmět:
Zdroj: Cancer and Metastasis Reviews. 39:91-114
ISSN: 1573-7233
0167-7659
DOI: 10.1007/s10555-020-09851-4
Popis: Physical exercise is considered a well-tolerated adjuvant therapy to mitigate cancer-related side effects, but its impact on metastasis is unclear. The present systematic review and meta-analysis aimed to summarize the evidence on the effects of exercise on metastasis in animal cancer models. A systematic search was conducted to identify controlled studies in animals analyzing the impact of exercise interventions on any marker of metastasis incidence or severity. The pooled mean differences (PMD) were calculated for those endpoints for which a minimum of three studies used the same assessment method. We also calculated the pooled odds ratio (OR) of metastases. Twenty-six articles were included in the systematic review, of which 12 could be meta-analyzed. Exercise training in murine cancer models did not significantly modify the number of metastatic foci (PMD = − 3.18; 95% confidence interval [CI] − 8.32, 1.97; p = 0.23), the weight of metastatic tumors (PMD = − 0.03; 95% CI − 0.10, 0.04; p = 0.41), or the risk of developing metastasis (OR = 0.64; 95% CI 0.10, 4.12; p = 0.64). These findings suggest that exercise has no overall influence on any marker of cancer metastasis incidence or severity in animal models. However, the wide methodological heterogeneity observed between studies might be taken into account and the potential exercise effects on metastasis development remain to be determined in pediatric tumors. Sin financiación 9.264 JCR (2020) Q1, 32/242 Oncology 2.555 SJR (2020) Q1, 30/211 Cancer Research No data IDR 2019 UEM
Databáze: OpenAIRE
Externí odkaz: