NK cells migrate in response to C-C chemokines, including monocyte chemotactic protein-1 (MCP-1) and MCP-3. Increased migration was observed in IL-2-activated NK cells. It was therefore of interest to define the expression in resting and activated NK cells of the MCP-1 receptor (CCR2) for which two cDNAs (A and B) have been described. Specific oligonucleotides and reverse-transcriptase PCR revealed the presence in activated NK cells and mononuclear phagocytes of the fragments expected on the basis of the reported cDNAs. In addition, amplification with a common A/B- and an A-specific oligonucleotide yielded an unexpected, abundant, 1649-bp fragment. Sequence analysis as well as Northern blotting and RNase protection with different probes revealed that the CCR2 gene is expressed in activated NK cells and mononuclear phagocytes as a predominant long transcript (3.4 kb) consisting of CCR2B, followed by a novel sequence (X), corresponding to an intron in the genome, and by a CCR2A-specific portion. The predominant long transcript is polyadenylated and present in the cytoplasm. The augmented migratory capacity of IL-2 activated vs resting NK cells was associated with increased CCR2 transcript levels.
IL-2 regulated expression of the monocyte chemotactic protein-1 receptor (CCR2) in human NK cells: characterization of a predominant 3.4 kilobase transcript containing CCR2B and CCR2A sequences / N. Polentarutti, P. Allavena, G. Bianchi, G. Giardina, A. Basile, S. Sozzani, A. Mantovani, M. Introna. - In: JOURNAL OF IMMUNOLOGY. - ISSN 0022-1767. - 158:6(1997 Mar 15), pp. 2689-2694.
|Titolo:||IL-2 regulated expression of the monocyte chemotactic protein-1 receptor (CCR2) in human NK cells: characterization of a predominant 3.4 kilobase transcript containing CCR2B and CCR2A sequences|
MANTOVANI, ALBERTO (Penultimo)
|Settore Scientifico Disciplinare:||Settore MED/46 - Scienze Tecniche di Medicina di Laboratorio|
|Data di pubblicazione:||15-mar-1997|
|Appare nelle tipologie:||01 - Articolo su periodico|