Volume 192, Issue 3 pp. 634-642
Research Paper

Cell-derived microparticles and sickle cell disease chronic vasculopathy in sub-Saharan Africa: A multinational study

Abdoul K. Dembélé

Abdoul K. Dembélé

Université de Paris, UMR_S1134, Biologie Intégrée du Globule Rouge (BIGR), INSERM, Paris, France

Institut National de Transfusion Sanguine, Paris, France

Laboratoire d’Excellence GR-Ex, Paris, France

Centre de Recherche et de Lutte contre la Drépanocytose (CRLD), Bamako, Mali

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Claudine Lapoumeroulie

Claudine Lapoumeroulie

Université de Paris, UMR_S1134, Biologie Intégrée du Globule Rouge (BIGR), INSERM, Paris, France

Institut National de Transfusion Sanguine, Paris, France

Laboratoire d’Excellence GR-Ex, Paris, France

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Mor Diaw

Mor Diaw

Université Cheikh Anta Diop de Dakar (UCAD), Laboratoire de Physiologie et Explorations Fonctionnelles, Dakar, Sénégal

Unité Mixte Internationale (UMI 3189), ‘Environnement, Santé, Sociétés’ CNRS, UCAD, CNRST, USTTB, UGB, Dakar, Sénégal

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Oumarou Tessougue

Oumarou Tessougue

Centre de Recherche et de Lutte contre la Drépanocytose (CRLD), Bamako, Mali

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Lucile Offredo

Lucile Offredo

Laboratoire d’Excellence GR-Ex, Paris, France

Université de Paris, INSERM, Paris Cardiovascular Centre - PARCC, Paris, France

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Dapa A. Diallo

Dapa A. Diallo

Centre de Recherche et de Lutte contre la Drépanocytose (CRLD), Bamako, Mali

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Saliou Diop

Saliou Diop

Centre National de Transfusion Sanguine (CNTS), Dakar, Sénégal

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Jacques Elion

Jacques Elion

Université de Paris, UMR_S1134, Biologie Intégrée du Globule Rouge (BIGR), INSERM, Paris, France

Institut National de Transfusion Sanguine, Paris, France

Laboratoire d’Excellence GR-Ex, Paris, France

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Yves Colin-Aronovicz

Yves Colin-Aronovicz

Université de Paris, UMR_S1134, Biologie Intégrée du Globule Rouge (BIGR), INSERM, Paris, France

Institut National de Transfusion Sanguine, Paris, France

Laboratoire d’Excellence GR-Ex, Paris, France

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Pierre-Louis Tharaux

Pierre-Louis Tharaux

Laboratoire d’Excellence GR-Ex, Paris, France

Université de Paris, INSERM, Paris Cardiovascular Centre - PARCC, Paris, France

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Xavier Jouven

Xavier Jouven

Laboratoire d’Excellence GR-Ex, Paris, France

Université de Paris, INSERM, Paris Cardiovascular Centre - PARCC, Paris, France

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Marc Romana

Marc Romana

Laboratoire d’Excellence GR-Ex, Paris, France

Université des Antilles, UMR_S1134, BIGR, INSERM, Pointe-à-Pitre, France

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Brigitte Ranque

Brigitte Ranque

Laboratoire d’Excellence GR-Ex, Paris, France

Université de Paris, INSERM, Paris Cardiovascular Centre - PARCC, Paris, France

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Caroline Le Van Kim

Corresponding Author

Caroline Le Van Kim

Université de Paris, UMR_S1134, Biologie Intégrée du Globule Rouge (BIGR), INSERM, Paris, France

Institut National de Transfusion Sanguine, Paris, France

Laboratoire d’Excellence GR-Ex, Paris, France

Equal contribution

Correspondence: Caroline Le Van Kim, Université de Paris, UMR_S1134, Biologie Intégrée du Globule Rouge, INSERM, F-75015 Paris, France; Institut National de Transfusion Sanguine, 6 rue Alexandre Cabanel, 75739 Paris, France.

E-mail: [email protected]

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First published: 29 November 2020
Citations: 5

Summary

Although most individuals with sickle cell disease (SCD) live in sub-Saharan Africa, the natural history of the disease on this continent remains largely unknown. Intravascular haemolysis results in activation of circulating blood cells and release of microparticles (MPs) that exert pro-inflammatory effects and contribute to vascular damage. We designed a case-control study nested in the CADRE cohort (Coeur-Artère-DRÉpanocytose, clinical trials.gov identifier NCTO3114137) and based on extreme phenotypes, to analyse blood cell-derived MPs in 232 adult SS patients at steady state in Bamako and Dakar. Thirty-six healthy adult controls matched by age and sex were recruited in Bamako. The MPs concentrations were higher in SS patients compared to AA controls with a predominance of erythrocyte- and reticulocyte-derived MPs. These erythroid-derived MPs were significantly lower in patients with retinopathy (P = 0·022). Reticulocyte-derived MPs were significantly negatively and positively associated with a history of priapism (P = 0·020) and leg ulcers (P = 0·041) respectively. We describe for the first time the comparative patterns of plasma MPs in healthy subjects and

patients with SCD living in sub-Saharan Africa and exhibiting various complications. Because our present results show no clear pattern of correlation between erythroid MPs and the classical hyper-haemolytic complications, we hypothesise a weak relevance of the hyper-haemolysis versus hyper-viscous paradigm in Africa.

CONFLICT OF INTEREST

The authors have no conflict of interest to declare.

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