Accelerated dendritic-cell migration and T-cell priming in SPARC-deficient mice

Sabina Sangaletti, Lucia Gioiosa, Cristiana Guiducci, Gianlucca Rotta, Maria Rescigno, Antonella Stoppacciaro, Claudia Chiodoni, Mario P. Colombo

Research output: Contribution to journalArticle

Abstract

On their path to draining lymph nodes, epidermal Langerhans cells traverse collagen-dense connective tissue before reaching lymphatic vessels. The matricellular protein SPARC (secreted protein, acidic and rich in cysteine), which is induced during inflammation and tissue repair, organizes collagen deposition in tissue stroma. We analyzed Langerhans cell and dendritic-cell migration and its impact on T-cell priming in SPARC-null (SPARC-/-) and SPARC-sufficient (SPARC+/+) mice. Although the same number of Langerhans cells populate the ear skin of SPARC-/- and SPARC+/+ mice, more Langerhans cells were found in the lymph nodes draining antigen-sensitized ears of SPARC-/- mice and significantly more Langerhans cells migrated from null-mice-derived ear skin explants. Such favored Langerhans cell migration is due to the host environment, as demonstrated by SPARC+/+> SPARC-/- and reciprocal chimeras, and have a profound influence on T-cell priming. Contact-, delayed type-hypersensitivity and naive T-cell receptor-transgenic T-cell priming, together indicate that the lack of SPARC in the environment accelerates the onset of T-cell priming by hastening Langerhans cell/dendritic-cell migration.

Original languageEnglish
Pages (from-to)3685-3694
Number of pages10
JournalJournal of Cell Science
Volume118
Issue number16
DOIs
Publication statusPublished - Aug 15 2005

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Keywords

  • DC migration
  • SPARC
  • T-cell priming

ASJC Scopus subject areas

  • Cell Biology

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