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© Michaela Muller-Trutwin
HIV
Publication : Blood

Novel pathway for megakaryocyte production after in vivo conditional eradication of integrin alphaIIb-expressing cells

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Blood - 09 Jun 2005

Jacquelin B, Kortulewski T, Vaigot P, Pawlik A, Gruel G, Alibert O, Soularue P, Joubert C, Gidrol X, Tronik-Le Roux D

Link to Pubmed [PMID] – 15947096

Blood 2005 Sep;106(6):1965-74

Our knowledge of the molecular mechanisms that regulate hematopoiesis in physiologic and pathologic conditions is limited. Using a molecular approach based on cDNA microarrays, we demonstrated the emergence of an alternative pathway for mature bone marrow cell recovery after the programmed and reversible eradication of CD41+ cells in transgenic mice expressing a conditional toxigene targeted by the platelet alphaIIb promoter. The expression profile of the newly produced CD41+ cells showed high levels of transcripts encoding Ezh2, TdT, Rag2, and various immunoglobulin (Ig) heavy chains. In this context, we identified and characterized a novel population of Lin-Sca-1hi c-Kit- cells, with a lymphoid-like expression pattern, potentially involved in the reconstitution process. Our study revealed novel transcriptional cross talk between myeloid and lymphoid lineages and identified gene expression modifications that occur in vivo under these particular stress conditions, opening important prospects for therapeutic applications.

http://www.ncbi.nlm.nih.gov/pubmed/15947096