title: CLEC5A (MDL-1) is a novel PU.1 transcriptional target during myeloid differentiation.
abstract: C-type lectin domain family 5, member A (CLEC5A), also known as myeloid DNAX activation protein 12 (DAP12)-associating lectin-1 (MDL-1), is a cell surface receptor strongly associated with the activation and differentiation of myeloid cells. CLEC5A associates with its adaptor protein DAP12 to activate a signaling cascade resulting in activation of downstream kinases in inflammatory responses. Currently, little is known about the transcriptional regulation of CLEC5A. We identified CLEC5A as one of the most highly induced genes in a microarray gene profiling experiment of PU.1 restored myeloid PU.1-null cells. We further report that CLEC5A expression is significantly reduced in several myeloid differentiation models upon PU.1 inhibition during monocyte/macrophage or granulocyte differentiation. In addition, CLEC5A mRNA expression was significantly lower in primary acute myeloid leukemia (AML) patient samples than in macrophages and granulocytes from healthy donors. Moreover, we found activation of a CLEC5A promoter reporter by PU.1 as well as in vivo binding of PU.1 to the CLEC5A promoter. Our findings indicate that CLEC5A expression in monocyte/macrophage and granulocytes is regulated by PU.1.
authors.affiliation: Department of Clinical Research, University of Bern, Bern, Switzerland.
authors.forename: Jasmin
authors.initials: J
authors.lastname: Batliner
authors.forename: Maria Michela
authors.initials: MM
authors.lastname: Mancarelli
authors.forename: Mathias
authors.initials: M
authors.lastname: Jenal
authors.forename: Venkateshwar A
authors.initials: VA
authors.lastname: Reddy
authors.forename: Martin F
authors.initials: MF
authors.lastname: Fey
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Torbett
authors.forename: Mario P
authors.initials: MP
authors.lastname: Tschan
mesh_terms: D000818:Animals; D001483:Base Sequence; D002454:Cell Differentiation / Q000235:genetics*; D045744:Cell Line, Tumor; D015973:Gene Expression Regulation, Leukemic; D055785:Gene Knockdown Techniques; D020868:Gene Silencing; D037181:Lectins, C-Type / Q000235:genetics* / Q000378:metabolism; D015470:Leukemia, Myeloid, Acute / Q000235:genetics / Q000473:pathology; D015473:Leukemia, Promyelocytic, Acute / Q000235:genetics / Q000473:pathology; D008264:Macrophages / Q000166:cytology / Q000378:metabolism; D051379:Mice; D008969:Molecular Sequence Data; D009000:Monocytes / Q000166:cytology / Q000378:metabolism; D022423:Myeloid Cells / Q000166:cytology* / Q000378:metabolism*; D009504:Neutrophils / Q000166:cytology / Q000378:metabolism; D011401:Promoter Regions, Genetic / Q000235:genetics; D011518:Proto-Oncogene Proteins / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011956:Receptors, Cell Surface / Q000235:genetics* / Q000378:metabolism; D015534:Trans-Activators / Q000378:metabolism*; D014158:Transcription, Genetic; D000099232:Proto-Oncogene Protein Spi-1
chemical_list: D037181:Lectins, C-Type; D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D011956:Receptors, Cell Surface; D015534:Trans-Activators; D000099232:Proto-Oncogene Protein Spi-1; C509771:CLEC5A protein, human