7LIBM - Laboratoire Interuniversitaire de Biologie de la Motricité (CAMPUS SANTE INNOVATIONS - Bâtiment IRMIS - 10 rue de la Marandière 42270 Saint Priest en Jarez /
Université Savoie Mont Blanc - Campus Scientifique - 73370 Le Bourget du Lac / UFR STAPS - Université Claude Bernard Lyon I - 27/29 Boulevard du 11 novembre 1918 - 69622 Villeurbanne Cedex - France)
Abstract : The present study investigated cerebral and muscle hemoglobin oxygen saturation (tissue oxygen index, TOI) in children with sickle cell anemia (SS), sickle cell hemoglobin C disease (SC) and healthy children (AA). TOI was measured by near-infrared spectroscopy (NIRS) and spectral analysis of the TOI variability was used to assess flowmotion and vasomotion. Arterial oxyhemoglobin saturation (SpO2), hemorheological and hematological parameters were also measured in SS and SC children. Both TOI were lower in SS compared to both AA and SC children, with SC exhibiting lower values than AA children. Cerebral vasomotion expressed in absolute values was enhanced in SS compared to AA and SC children. Muscle vasomotion did not differ between the three groups. Hematocrit, SpO2 and red blood cell deformability were positively associated with cerebral TOI in SS children. We demonstrated that 1) cerebral and muscle TOI were markedly decreased in SS children while the decrease of TOI was milder in SC children, 2) cerebral TOI level was associated with several biological markers in SS children only and 3) cerebral vasomotion was enhanced in SS, possibly to counterbalance the effects of chronic cerebral hypoxia.
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Keyne Charlot, Sophie Antoine-Jonville, Berenike Moeckesch, Stéphane Jumet, Marc Romana, et al.. Cerebral and muscle microvascular oxygenation in children with sickle cell disease: Influence of hematology, hemorheology and vasomotion.. Blood Cells, Molecules and Diseases, Elsevier, 2017, 65, pp.23-28. ⟨10.1016/j.bcmd.2017.03.015⟩. ⟨inserm-01519106⟩