CD20-related signaling pathway is differently activated in normal and dystrophic circulating CD133+ stem cells

D. Parolini, M. Meregalli, M. Belicchi, P. Razini, R. Lopa, B. Del Carlo, A. Farini, S. Maciotta, N. Bresolin, L. Porretti, M. Pellegrino, Y. Torrente

Research output: Contribution to journalArticlepeer-review


Among the heterogeneous population of circulating hematopoietic and endothelial progenitors, we identified a subpopulation of CD133+ cells displaying myogenic properties. Unexpectedly, we observed the expression of the B-cell marker CD20 in blood-derived CD133+ stem cells. The CD20 antigen plays a role in the modulation of intracellular calcium homeostasis through signaling pathways activation. Several observations suggest that an increase in intracellular calcium concentration ([Ca2+]i) could be involved in the etiology of the Duchenne muscular dystrophy (DMD). Here, we show that a CD20-related signaling pathway able to induce an increase in [Ca2+]i is differently activated after brain derived neurotrophic factor (BDNF) stimulation of normal and dystrophic blood-derived CD133+ stem cells, supporting the assumption of a "CD20-related calcium impairment" affecting dystrophic cells. Presented findings represent the starting point toward the expansion of knowledge on pathways involved in the pathology of DMD and in the behavior of dystrophic blood-derived CD133+ stem cells.

Original languageEnglish
Pages (from-to)697-710
Number of pages14
JournalCellular and Molecular Life Sciences
Issue number4
Publication statusPublished - Feb 2009


  • Brain derived neurotrophic factor (BDNF)
  • Ca
  • CD133
  • CD20
  • Circulating stem cells
  • Duchenne muscular dystrophy (DMD)

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology
  • Molecular Medicine
  • Pharmacology
  • Cellular and Molecular Neuroscience


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