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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Housing conditions modulate spontaneous physical activity, feeding behavior, aerobic running capacity and adiposity in C57BL/6J mice

Texto completo
Autor(es):
Menezes Scariot, Pedro Paulo [1] ; Manchado-Gobatto, Fulvia B. [1] ; Prolla, Tomas A. [2] ; Masselli Dos Reis, Ivan G. [1] ; Gobatto, Claudio Alexandre [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Sch Appl Sci, Lab Appl Sport Physiol, Pedro Zaccaria St 1-300, BR-13484350 Limeira, SP - Brazil
[2] Univ Wisconsin, Dept Genet & Med Genet, Madison, WI - USA
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Hormones and Behavior; v. 115, SEP 2019.
Citações Web of Science: 0
Resumo

There is evidence of reduced adiposity in rodents living in a large cages (LC) as compared to animals housed in small cages (SC). Because spontaneous physical activity (SPA) provides an important portion of the total daily energy expenditure, an increase of SPA in rodents kept in LC could explain their reduced body fat accumulation. The relationship between SPA and components of physical fitness (i.e. aerobic and anaerobic fitness and body leanness) has not been previously determined. We examined the effects of eight weeks of LC exposure on SPA, body composition, feeding behavior, as well as aerobic and anaerobic running capacity in adult C57BL/6J mice. Male mice were housed in cages of two different sizes for 8 weeks: a small (SC, n = 10) and large (LC n = 10) cages with 1320 cm(2) and 4800 cm(2) floor space, respectively. SPA was measured gravimetrically, and food and water intake were recorded daily. Mice had critical velocity (CV) and anaerobic running capacity (ARC) evaluated at the beginning, middle course (4th week) and at the end of study (8th week). Despite non-significant differences in each week LC-mice were more active than SC-mice by considering all SPA values obtained in the entire period of 8 weeks. The difference in SPA over the whole day was mainly due to light phase activity, but also due to activity at dark period (from 6 pm to 9 pm and from 5 am to 6 am). LC-mice also exhibited higher food and water intake over the entire 8-wk period. LC-mice had lower content of fat mass (% of the eviscerated carcass) than SC-mice (SC: 8.4 +/- 0.4 vs LC: 6.3 +/- 0.3, p < 0.05). LC-mice also exhibited reduced epididymal fat pads (% of body mass) compared to SC-mice (SC: 1.3 +/- 0.1 vs LC: 0.9 +/- 0.1, p < 0.05) and retroperitoneal fat pads (SC: 0.4 +/- 0.05 vs LC: 0.2 +/- 0.02, p < 0.05). The LC-group showed significantly higher critical velocity than SC-group at the fourth week (SC: 14.9 +/- 0.6 m.min(-1) vs LC: 18.0 +/- 0.3 m.min(-1), p < 0.05) and eighth week (SC: 17.1 +/- 0.5 m.min(-1) vs LC: 18.8 +/- 0.6 m.min(-1), p < 0.05). Our findings demonstrate that eight weeks of LC housing increases SPA of C57BL/6J mice, and this may lead to reduced fat accumulation as well as higher aerobic fitness. Importantly, our study implies that SC limits SPA, possibly generating experimental artifacts in long-term rodent studies. (AU)

Processo FAPESP: 17/10201-4 - Efeitos do treinamento físico aeróbio e espaço habitacional de camundongos sobre a atividade física espontânea e respostas metabólicas e moleculares centrais e periféricas
Beneficiário:Claudio Alexandre Gobatto
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 15/00272-6 - Efeitos da restrição calórica mediados pela SIRT3 sobre as capacidades aeróbia e anaeróbia de camundongos: relações com a atividade espontânea, parâmetros metabólicos e função mitocondrial muscular no envelhecimento
Beneficiário:Fúlvia de Barros Manchado Gobatto
Linha de fomento: Bolsas no Exterior - Pesquisa
Processo FAPESP: 15/01362-9 - Efeitos da idade, dieta de restrição calórica (Cr) e SIRT3 sobre a atividade espontânea, mediadores comportamentais e oxidativos (no, nos e orexina) e respiração mitocondrial hipotalâmica
Beneficiário:Claudio Alexandre Gobatto
Linha de fomento: Bolsas no Exterior - Pesquisa