Title :

Muscle Oxygen Supply Impairment during Exercise in Poorly Controlled Type 1 Diabetes

Author(s) :

Tagougui, Semah [Auteur]
Leclair, Erwan [Auteur]
fontaine, pierre [Auteur]
Génomique Intégrative et Modélisation des Maladies Métaboliques (EGID) - UMR 8199
Matran, Regis [Auteur]
IMPact de l'Environnement Chimique sur la Santé humaine (IMPECS) - ULR 4483
Marais, Gaëlle [Auteur]
Aucouturier, Julien [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - EA 7369
Descatoire, Aurélien [Auteur]
Vambergue, Anne [Auteur]
Oussaidene, Kahina [Auteur]
Baquet, Georges [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369
Heyman, Elsa [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369

Journal title :

Medicine and science in sports and exercise

Abbreviated title :

Med. Sci. Sports Exerc.

Volume number :

47

Pages :

231-239

Publication date :

2015-02-01

ISSN :

0195-9131

English keyword(s) :

OXYGEN RELEASE
SKELETAL MUSCLE
GLYCATED HEMOGLOBIN
OXYGEN DELIVERY
AEROBIC FITNESS

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

OBJECTIVE: Aerobic fitness, as reflected by maximal oxygen (O2) uptake (VO2max), is impaired in poorly controlled patients with type 1 diabetes. The mechanisms underlying this impairment remain to be explored. This study ...
Show more >OBJECTIVE: Aerobic fitness, as reflected by maximal oxygen (O2) uptake (VO2max), is impaired in poorly controlled patients with type 1 diabetes. The mechanisms underlying this impairment remain to be explored. This study sought to investigate whether type 1 diabetes and high levels of glycated hemoglobin (HbA1c) influence O2 supply including O2 delivery and release to active muscles during maximal exercise. METHODS: Two groups of patients with uncomplicated type 1 diabetes (T1D-A, n = 11, with adequate glycemic control, HbA1c <7.0%; T1D-I, n = 12 with inadequate glycemic control, HbA1c >8%) were compared with healthy controls (CON-A, n = 11; CON-I, n = 12, respectively) matched for physical activity and body composition. Subjects performed exhaustive incremental exercise to determine VO2max. Throughout the exercise, near-infrared spectroscopy allowed investigation of changes in oxyhemoglobin, deoxyhemoglobin, and total hemoglobin in the vastus lateralis. Venous and arterialized capillary blood was sampled during exercise to assess arterial O2 transport and factors able to shift the oxyhemoglobin dissociation curve. RESULTS: Arterial O2 content was comparable between groups. However, changes in total hemoglobin (i.e., muscle blood volume) was significantly lower in T1D-I compared with that in CON-I. T1D-I also had impaired changes in deoxyhemoglobin levels and increase during high-intensity exercise despite normal erythrocyte 2,3-diphosphoglycerate levels. Finally, VO2max was lower in T1D-I compared with that in CON-I. No differences were observed between T1D-A and CON-A. CONCLUSIONS: Poorly controlled patients displayed lower VO2max and blunted muscle deoxyhemoglobin increase. The latter supports the hypotheses of increase in O2 affinity induced by hemoglobin glycation and/or of a disturbed balance between nutritive and nonnutritive muscle blood flow. Furthermore, reduced exercise muscle blood volume in poorly controlled patients may warn clinicians of microvascular dysfunction occurring even before overt microangiopathy.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CHU Lille
CNRS
Univ. Littoral Côte d’Opale
Univ. Artois
Institut Pasteur de Lille

Collections :

• Génomique Intégrative et Modélisation des Maladies Métaboliques (EGID) - UMR 8199
• IMPact de l'Environnement Chimique sur la Santé humaine (IMPECS) - ULR 4483
• Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369

Research team(s) :

Activité Physique, Muscle, Santé (APMS)

Submission date :

2019-09-24T10:01:34Z