Alternative links to fulltext:Pubmed
| Item type: | Article | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Journal or Publication Title: | The Journal of biological chemistry | ||||||||||||||||||||||||||||||||||||||||||||||||
| Volume: | 275 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Number of Issue or Book Chapter: | 13 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Page Range: | pp. 9773-81 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Date: | 2000 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Institutions: | Medicine > Lehrstuhl für Innere Medizin III (Hämatologie und Internistische Onkologie) | ||||||||||||||||||||||||||||||||||||||||||||||||
| Identification Number: |
| ||||||||||||||||||||||||||||||||||||||||||||||||
| Classification: |
| ||||||||||||||||||||||||||||||||||||||||||||||||
| Dewey Decimal Classification: | 600 Technology > 610 Medical sciences Medicine | ||||||||||||||||||||||||||||||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||||||||||||||||||||||||||||||
| Refereed: | Yes, this version has been refereed | ||||||||||||||||||||||||||||||||||||||||||||||||
| Created at the University of Regensburg: | Yes | ||||||||||||||||||||||||||||||||||||||||||||||||
| Item ID: | 14354 |
Abstract
The protein product of the Toll-like receptor (TLR) 4 gene has been implicated in the signal transduction events induced by lipopolysaccharide (LPS). In mice, destructive mutations of Tlr4 impede the normal response to LPS and cause a high susceptibility to Gram-negative infection. Expression of TLR4 mRNA in humans is restricted to a small number of cell types, including LPS-responsive myeloid ...
Abstract
The protein product of the Toll-like receptor (TLR) 4 gene has been implicated in the signal transduction events induced by lipopolysaccharide (LPS). In mice, destructive mutations of Tlr4 impede the normal response to LPS and cause a high susceptibility to Gram-negative infection. Expression of TLR4 mRNA in humans is restricted to a small number of cell types, including LPS-responsive myeloid cells, B-cells, and endothelial cells. To investigate the molecular basis for TLR4 expression in cells of myeloid origin, we cloned the human TLR4 gene and analyzed its putative 5'-proximal promoter. In transient transfections a region of only 75 base pairs upstream of the major transcription initiation site was sufficient to induce maximal luciferase activity in THP-1 cells. The sequence of this region is similar in human and mouse TLR4 genes and lacks a TATA box, typical Sp1-sites or CCAAT box sequences. Instead, it contains consensus-binding sites for Ets family transcription factors, octamer-binding factors, and a composite interferon response factor/Ets motif. The activity of the promoter in macrophages was strictly dependent on the integrity of both half sites of the composite interferon response factor/Ets motif, which was constitutively bound by the myeloid and B-cell-specific transcription factor PU.1 and interferon consensus sequence-binding protein. These results indicate that the two tissue-restricted transcription factors PU.1 and interferon consensus sequence-binding protein participate in the basal regulation of human TLR4 in myeloid cells. Cloning of the human TLR4 gene provides a basis for further investigation of the possible impact of genetic variations on the susceptibility to infection and sepsis.
Metadata last modified: 24 May 2018 12:01
Owner only: item control page
Altmetric