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Megakaryocytes form linear podosomes devoid of digestive properties to remodel medullar matrix.
Oprescu, Antoine; Michel, Déborah; Antkowiak, Adrien; Vega, Elodie; Viaud, Julien; Courtneidge, Sara A; Eckly, Anita; de la Salle, Henri; Chicanne, Gaëtan; Léon, Catherine; Payrastre, Bernard; Gaits-Iacovoni, Frédérique.
Afiliación
  • Oprescu A; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Michel D; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Antkowiak A; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Vega E; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Viaud J; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Courtneidge SA; Department of Cell, Development and Cancer Biology, Oregon Health & Science University, Oregon, USA.
  • Eckly A; INSERM, UMR_S1255, Université de Strasbourg, Etablissement Français du Sang-GEST, Strasbourg, France.
  • de la Salle H; INSERM, UMR_S1255, Université de Strasbourg, Etablissement Français du Sang-GEST, Strasbourg, France.
  • Chicanne G; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Léon C; INSERM, UMR_S1255, Université de Strasbourg, Etablissement Français du Sang-GEST, Strasbourg, France.
  • Payrastre B; INSERM, UMR1297, Université Toulouse III, Institut des Maladies Métaboliques et Cardiovasculaires, Toulouse, France.
  • Gaits-Iacovoni F; CHU de Toulouse, laboratoire d'Hématologie, Toulouse, France.
Sci Rep ; 12(1): 6255, 2022 04 15.
Article en En | MEDLINE | ID: mdl-35428815
Bone marrow megakaryocytes (MKs) undergo a maturation involving contacts with the microenvironment before extending proplatelets through sinusoids to deliver platelets in the bloodstream. We demonstrated that MKs assemble linear F-actin-enriched podosomes on collagen I fibers. Microscopy analysis evidenced an inverse correlation between the number of dot-like versus linear podosomes over time. Confocal videomicroscopy confirmed that they derived from each-other. This dynamics was dependent on myosin IIA. Importantly, MKs progenitors expressed the Tks4/5 adaptors, displayed a strong gelatinolytic ability and did not form linear podosomes. While maturing, MKs lost Tks expression together with digestive ability. However, those MKs were still able to remodel the matrix by exerting traction on collagen I fibers through a collaboration between GPVI, ß1 integrin and linear podosomes. Our data demonstrated that a change in structure and composition of podosomes accounted for the shift of function during megakaryopoiesis. These data highlight the fact that members of the invadosome family could correspond to different maturation status of the same entity, to adapt to functional responses required by differentiation stages of the cell that bears them.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Megacariocitos / Podosomas Idioma: En Revista: Sci Rep Año: 2022 Tipo del documento: Article País de afiliación: Francia

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Megacariocitos / Podosomas Idioma: En Revista: Sci Rep Año: 2022 Tipo del documento: Article País de afiliación: Francia