Living high- training low model applied to C57BL/6J mice: Effects on physiological parameters related to aerobic fitness and acid-base balance

Autor(es)

Scariot, Pedro Paulo Menezes ; Papoti, Marcelo ; Polisel, Emanuel Elias Camolese ; Orsi, Juan Bordon ; Ginkel, Paul R. Van ; Prolla, Tomas A. ; Manchado-Gobatto, Fulvia Barros ; Gobatto, Claudio Alexandre

• Tipo de documento: Artigo Científico
• Fonte: Life Sciences; v. 317, p. 17-pg., 2023-02-01.

Resumo

There is a scarcity of data regarding the acclimation to high altitude (hypoxic environment) accompanied by training at low altitude (normoxic conditions), the so-called "living high-training low" (LHTL) model in rodents. We aimed to investigate the effects of aerobic training on C57BL/6J mice living in normoxic (NOR) or hypoxic (HYP) environments on several parameters, including critical velocity (CV), a parameter regarded as a measure of aerobic capacity, on monocarboxylate transporters (MCTs) in muscles and hypothalamus, as well as on he-matological parameters and body temperature. In each environment, mice were divided into non-trained (N) and trained (T). Forty rodents were distributed into the following experimental groups (N-NOR; T-NOR; N-HYP and T-HYP). HYP groups were in a normobaric tent where oxygen-depleted air was pumped from a hypoxia generator set an inspired oxygen fraction [FiO2] of 14.5 %. The HYP-groups were kept (18 h per day) in a normobaric tent for consecutive 8-weeks. Training sessions were conducted in normoxic conditions ([FiO2] = 19.5 %), 5 times per week (40 min per session) at intensity equivalent to 80 % of CV. In summary, eight weeks of LHTL did not promote a greater improvement in the CV, protein expression of MCTs in different tissues when compared to the application of training alone. The LHTL model increased red blood cells count, but reduced hemoglobin per erythrocyte was found in mice exposed to LHTL. Although the LHTL did not have a major effect on thermo-graphic records, exercise-induced hyperthermia (in the head) was attenuated in HYP groups when compared to NOR groups. (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
• Modalidade de apoio: 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
• Modalidade de apoio: 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
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 19/05115-7 - Efeitos do treinamento aeróbio e do ambiente em hipóxia sobre respostas moleculares envolvidas com o metabolismo anaeróbio, aeróbio e controle ácido-básico nos tecidos hipotalâmico e muscular de camundongos
• Beneficiário: Pedro Paulo Menezes Scariot
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/12781-5 - Adaptações metabólicas, hematológicas e neuromusculares provenientes do treinamento "dormir alto e treinar baixo", seguido de um período de polimento: um estudo duplo-cego e randomizado.
• Beneficiário: Marcelo Papoti
• Modalidade de apoio: Auxílio à Pesquisa - Regular