Analysis of genes regulated by the transcription factor LUMAN identifies ApoA4 as a target gene in dendritic cells.
Dendritic cells (DCs) are professional antigen presenting cells of the immune system that play a crucial role in initiating immune responses and maintaining self tolerance. Better understanding of the molecular basis of DC immunobiology is required to improve DC-based immunotherapies. We previously described the interaction of transcription factor LUMAN (also known as CREB3 or LZIP) with the DC-specific transmembrane protein DC-STAMP in DCs. Target genes of LUMAN and its role in DCs are currently unknown. In this study we set out to identify genes regulated by LUMAN in DCs using microarray analysis. Expression of a constitutively active form of LUMAN in mouse DC cell line D2SC/1 identified Apolipoprotein A4 (ApoA4) as its target gene. Subsequent validation experiments, bioinformatics-based promoter analysis, and silencing studies confirmed that ApoA4 is a true target gene of LUMAN in bone marrow-derived DCs (BMDCs).
Department of Tumor Immunology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
Anna
A
Sanecka
Marleen
M
Ansems
Maaike A
MA
van Hout-Kuijer
Maaike W G
MW
Looman
Amy C
AC
Prosser
Suzanne
S
Welten
Christian
C
Gilissen
Iziah E
IE
Sama
Martijn A
MA
Huynen
Joris A
JA
Veltman
Bastiaan J H
BJ
Jansen
Dagmar
D
Eleveld-Trancikova
Gosse J
GJ
Adema
D000818:Animals; D001054:Apolipoproteins A / Q000235:genetics*; D001854:Bone Marrow Cells / Q000187:drug effects / Q000378:metabolism; D020126:Brefeldin A / Q000494:pharmacology; D002460:Cell Line; D002478:Cells, Cultured; D017362:Cyclic AMP Response Element-Binding Protein / Q000235:genetics*; D003713:Dendritic Cells / Q000187:drug effects / Q000378:metabolism*; D005260:Female; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D057809:HEK293 Cells; D006801:Humans; D051379:Mice; D008810:Mice, Inbred C57BL; D041681:NIH 3T3 Cells; D020411:Oligonucleotide Array Sequence Analysis; D011500:Protein Synthesis Inhibitors / Q000494:pharmacology; D034622:RNA Interference; D020133:Reverse Transcriptase Polymerase Chain Reaction
D001054:Apolipoproteins A; C116472:Creb3 protein, mouse; D017362:Cyclic AMP Response Element-Binding Protein; D011500:Protein Synthesis Inhibitors; C022205:apolipoprotein A-IV; D020126:Brefeldin A