TY - JOUR
T1 - Transcriptional regulation of TSG6, a tumor necrosis factor- and interleukin-1-inducible primary response gene coding for a secreted hyaluronan-binding protein
AU - Lee, T. H.
AU - Klampfer, L.
AU - Shows, T. B.
AU - Vilcek, J.
PY - 1993
Y1 - 1993
N2 - TSG6 was originally identified as a tumor necrosis factor (TNF)-inducible gene in human fibroblasts. Earlier we showed that the secretory TSG6 protein is a member of a family of hyaluronan-binding proteins that includes cartilage link protein, proteoglycan core protein, and the adhesion receptor CD44. In the present study we have used Southern blot analysis to demonstrate that TSG6 is a single-copy gene in the human and murine species. With the aid of a somatic cell hybrid mapping panel, TSG6 was assigned to human chromosome 2. Nuclear run-on analysis revealed that TNF produced a rapid, primary transcriptional activation of the TSG6 gene in normal human FS-4 fibroblasts. In order to learn more about the regulation of TSG6 gene expression, we cloned the TSG6 gene from a genomic library of human white blood cells. Sequencing of a 1.3-kilobase fragment of the 5'-flanking region of the TSG6 gene identified TATA-like and CAAT sequences near the transcription start site. In addition, potential binding sites for NF-IL-6, AP-1, interferon regulatory factors (IRF)-1 and -2, and glucocorticoid response elements were identified in the 5'-flanking region. A single transcription start site was identified by primer extension. Deletion analysis of the 5'-flanking region of the TSG6 DNA linked to the chloramphenicol acetyltransferase reporter gene revealed that a construct containing TSG6 DNA from positions -165 to +78 could be transcriptionally activated by interleukin(IL)-1, and to a lesser extent by TNF, upon transfection into FS-4 fibroblasts. The region that imparts inducibility by IL-1 or TNF (positions -165 to -58) contains potential binding sites for IRF-1 and -2, AP-1, and NF-IL-6. A region mediating transcriptional silencing was localized further upstream (between positions -332 and -165). The results suggest that TSG6 gene expression is regulated by an interplay of positively and negatively acting transactivating factors.
AB - TSG6 was originally identified as a tumor necrosis factor (TNF)-inducible gene in human fibroblasts. Earlier we showed that the secretory TSG6 protein is a member of a family of hyaluronan-binding proteins that includes cartilage link protein, proteoglycan core protein, and the adhesion receptor CD44. In the present study we have used Southern blot analysis to demonstrate that TSG6 is a single-copy gene in the human and murine species. With the aid of a somatic cell hybrid mapping panel, TSG6 was assigned to human chromosome 2. Nuclear run-on analysis revealed that TNF produced a rapid, primary transcriptional activation of the TSG6 gene in normal human FS-4 fibroblasts. In order to learn more about the regulation of TSG6 gene expression, we cloned the TSG6 gene from a genomic library of human white blood cells. Sequencing of a 1.3-kilobase fragment of the 5'-flanking region of the TSG6 gene identified TATA-like and CAAT sequences near the transcription start site. In addition, potential binding sites for NF-IL-6, AP-1, interferon regulatory factors (IRF)-1 and -2, and glucocorticoid response elements were identified in the 5'-flanking region. A single transcription start site was identified by primer extension. Deletion analysis of the 5'-flanking region of the TSG6 DNA linked to the chloramphenicol acetyltransferase reporter gene revealed that a construct containing TSG6 DNA from positions -165 to +78 could be transcriptionally activated by interleukin(IL)-1, and to a lesser extent by TNF, upon transfection into FS-4 fibroblasts. The region that imparts inducibility by IL-1 or TNF (positions -165 to -58) contains potential binding sites for IRF-1 and -2, AP-1, and NF-IL-6. A region mediating transcriptional silencing was localized further upstream (between positions -332 and -165). The results suggest that TSG6 gene expression is regulated by an interplay of positively and negatively acting transactivating factors.
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M3 - Article
C2 - 8454591
AN - SCOPUS:0027416471
VL - 268
SP - 6154
EP - 6160
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 9
ER -