BAD-LAMP is a novel biomarker of nonactivated human plasmacytoid dendritic cells

Author:

Defays Axel123,David Alexandre123,de Gassart Aude123,De Angelis Rigotti Francesca123,Wenger Till123,Camossetto Voahirana123,Brousset Pierre4,Petrella Tony5,Dalod Marc123,Gatti Evelina123,Pierre Philippe123

Affiliation:

1. Centre d'Immunologie de Marseille-Luminy, Université de la Méditerranée, Marseille, France;

2. Inserm, Marseille, France;

3. Centre National de la Recherche Scientifique, Marseille, France;

4. Inserm, Toulouse, France; and

5. Centre de Pathologie, Dijon, France

Abstract

Abstract The brain and dendritic cell (BAD)–associated lysosome-associated membrane protein (LAMP)–like molecule (BAD-LAMP, c20orf103, UNC-46) is a newly identified member of the family of LAMPs. BAD-LAMP expression in the mouse is confined to neurons. We demonstrate here that in humans, BAD-LAMP can specifically be found in the type I IFN-producing plasmacytoid dendritic cells (pDCs). Human BAD-LAMP is localized in the endoplasmic reticulum-Golgi intermediate compartment (ERGIC) of freshly isolated CD123+ pDCs and is rapidly lost upon activation by unmethylated cytosine-phosphate-guanine (CpG) oligonucleotides. The restricted pattern of BAD-LAMP expression allows for the rapid identification of normal and leukemic human pDCs in tissues and blood.

Publisher

American Society of Hematology

Subject

Cell Biology,Hematology,Immunology,Biochemistry

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