2006
DOI: 10.1182/blood-2005-03-1219
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Deficiency in the Wiskott-Aldrich protein induces premature proplatelet formation and platelet production in the bone marrow compartment

Abstract: The pathophysiology of microthrombocytopenia in the Wiskott-Aldrich syndrome (WAS) and its milder form, X-linked thrombocytopenia (XLT), is unclear. Although quantitative defects are correctable by splenectomy, residual platelet abnormalities are suggestive of intrinsic disturbances of production. In contrast to human patients, murine models of WASp deficiency exhibit only mild thrombocytopenia, and platelets are of normal size. Here, we have identified a critical role for WASp during murine platelet biogenesi… Show more

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Cited by 183 publications
(212 citation statements)
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“…In conjunction with increased bone marrow megakaryocytes, normal megakaryopoiesis as assessed by ploidy distribution, and increased extramedullary hematopoiesis [26], our results suggest that WASP deficiency impairs thrombopoiesis. This would be consistent with related studies in both murine and clinical WAS [15,17,41]. There are, however, significant caveats associated with this interpretation.…”
Section: Discussionsupporting
confidence: 78%
See 1 more Smart Citation
“…In conjunction with increased bone marrow megakaryocytes, normal megakaryopoiesis as assessed by ploidy distribution, and increased extramedullary hematopoiesis [26], our results suggest that WASP deficiency impairs thrombopoiesis. This would be consistent with related studies in both murine and clinical WAS [15,17,41]. There are, however, significant caveats associated with this interpretation.…”
Section: Discussionsupporting
confidence: 78%
“…There is evidence in favor of reduced or abnormal platelet production as well [15][16][17], but not all the relevant studies have supported this [18]. Reported abnormalities in the function of WASP(−) platelets include a slight increase in collagen-induced aggregation and a significant increase in the duration of calcium influx after thrombin stimulation [19,20].…”
mentioning
confidence: 93%
“…Myosin is an important structural component of Mks, PPs and platelets cytoskeleton. Impairment of its activity may alter the structure (demarcation membrane and cytoplasm 14 ), maturation 15,16 and function of Mk; it may also affect the intracellular cytoskeleton tensions that control Mk morphology. In line, the drosophila MAL-D/SRF complex regulates cell tension and is required for a robust actin cytoskeleton during cell migration.…”
Section: Po005 By Mann-whitney Test)mentioning
confidence: 99%
“…Quelques modèles décrivant l'organisation spatiale des protéines au niveau des podosomes ont été proposés [1,6], alors que l'agencement des composants des invadopodes [7] ne fait pas encore l'objet d'un consensus. La formation des podosomes des cellules du lignage myélo-monocytaire est dépendante de la matrice, collagène ou fibronectine selon les types cellulaires [8,9], et les podosomes apparaissent en réponse à l'adhérence. Cependant, l'événement premier qui conduit à l'assem-…”
Section: Podosomes Et Invadopodes : Deux Structures D'actine Apparentéesunclassified