Hypothalamic inflammation is reversed by endurance training in anorectic-cachectic rats

Fábio S. Lira, Alex S. Yamashita, Jose C. Rosa, Fábio L. Tavares, Erico Caperuto, Luiz C. Carnevali, Gustavo D. Pimentel, Ronaldo V.T. Santos, Miguel L. Batista, Alessandro Laviano, Filippo Rossi-Fanelli, Marília Seelaender

Research output: Contribution to journalArticlepeer-review

Abstract

Aim. We tested the effects of a cancer cachexia-anorexia sydrome upon the balance of anti and pro-inflammatory cytokines in the hypothalamus of sedentary or trained tumour-bearing (Walker-256 carcinosarcoma) rats. Methods. Animals were randomly assigned to a sedentary control (SC), sedentary tumour-bearing (ST), and sedentary pair-fed (SPF) groups or, exercised control (EC), exercised tumour-bearing (ET) and exercised pair-fed (EPF) groups. Trained rats ran on a treadmill (60%VO 2max) for 60 min/d, 5 days/wk, for 8 wks. We evaluated food intake, leptin and cytokine (TNF-, IL1) levels in the hypothalamus. Results: The cumulative food intake and serum leptin concentration were reduced in ST compared to SC. Leptin gene expression in the retroperitoneal adipose tissue (RPAT) was increased in SPF in comparison with SC and ST, and in the mesenteric adipose tissue (MEAT) the same parameter was decreased in ST in relation to SC. Leptin levels in RPAT and MEAT were decreased in ST, when compared with SC. Exercise training was also able to reduce tumour weight when compared to ST group. In the hypothalamus, IL-1 and IL-10 gene expression was higher in ST than in SC and SPF. Cytokine concentration in hypothalamus was higher in ST (TNF- and IL-1, p < 0.05), compared with SC and SPF. These pro-inflammatory cytokines concentrations were restored to control values (p < 0.05), when the animals were submitted to endurance training. Conclusion: Cancer-induced anorexia leads towards a pro-inflammatory state in the hypothalamus, which is prevented by endurance training which induces an anti-inflammatory state, with concomitant decrease of tumour weight.

Original languageEnglish (US)
Article number60
JournalNutrition and Metabolism
Volume8
DOIs
StatePublished - 2011
Externally publishedYes

Keywords

  • anorexia
  • cancer cachexia
  • cytokines
  • exercise training
  • hypothalamus
  • inflammation

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

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