Robert C Gallo

Publication Detail

The publication detail shows the title, authors (with indicators showing other profiled authors), information on the publishing organization, abstract and a link to the article in PubMed. This abstract is what is used to create the fingerprint of the publication. If any grants are referenced by the publication, they will be listed here as well.

Multiple pathways of amino terminal processing produce two truncated variants of RANTES/CCL5.

Jean K Lim; Jennifer M Burns; Wuyuan Lu; Anthony L DeVico (Profiled Authors: Anthony L DeVico; Wuyuan Lu)

Institute of Human Virology, University of Maryland Biotechnology Institute, University of Maryland, 725 W. Lombard Street, Baltimore, MD 21201, USA.
Journal of leukocyte biology 2005;78(2):442-52.

The CC chemokine regulated on activation, normal T cell expressed and secreted (RANTES)/CC chemokine ligand 5 (CCL5) is expressed by macrophages, endothelial cells, keratinocytes, and T cells during a wide variety of immune responses. Post-translational proteolysis is expected to play an important role in regulating such broad-based expression; however, the rates and modes of RANTES processing by primary cell systems remain poorly understood. Here, we show that peripheral blood mononuclear cells (PBMC) secrete RANTES as an intact molecule that is subject to three post-translational processing pathways. One occurs in the presence of serum or plasma and rapidly generates a RANTES variant lacking two N-terminal residues (3-68 RANTES). Such processing is mainly attributable to soluble CD26. A second pathway, which is evident in the absence of serum or plasma, generates 3-68 RANTES in concert with the expression of cell-surface CD26. The third pathway is unique and generates a novel variant lacking three N-terminal residues (4-68 RANTES). This variant binds CC chemokine receptor 5, exhibits reduced chemotactic and human immunodeficiency virus (HIV)-suppressive activity compared with 1-68 and 3-68 RANTES, and is generated by an unidentified enzyme associated with monocytes and neutrophils. Overall, these results indicate that the production of RANTES by primary cells is regulated by multiple processing pathways which produce two variants with different functional properties. Such findings have important implications for understanding the immunological and HIV-suppressive activities of native RANTES.

2 Originating Grant

• 1.

  Devico, Anthony S

  CHEMOKINES: A MEASURE OF PEDIATRIC HIV DISEASE ACTIVITY

  15 September 1999 - 30 June 2004

  NATIONAL INSTITUTE OF CHILD HEALTH AND HUMAN DEVELOPMENT

• 2.

  Devico, Anthony

  MACROPHAGE DERIVED CHEMOKINE AND HIV INFECTION

  16 August 1999 - 31 July 2004

  NATIONAL HEART, LUNG, AND BLOOD INSTITUTE

Scientific Context

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