Influence of glucose and inflammatory cytokines on TGF-beta1 and CTGF mRNA expressions in human peritoneal mesothelial cells
| Autor: | Nobuyoshi, Sakamoto, Kazunobu, Sugimura, Hidenori, Kawashima, Kenji, Tsuchida, Yoshiaki, Takemoto, Toshihide, Naganuma, Shinji, Tatsumi, Tatsuya, Nakatani |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Time Factors
Dose-Response Relationship Drug Interleukin-6 Reverse Transcriptase Polymerase Chain Reaction Tumor Necrosis Factor-alpha Connective Tissue Growth Factor Immediate-Early Proteins Transforming Growth Factor beta1 Glucose Transforming Growth Factor beta Cytokines Humans Intercellular Signaling Peptides and Proteins RNA Messenger Peritoneum Omentum Cells Cultured Interleukin-1 |
| Zdroj: | International journal of molecular medicine. 15(6) |
| ISSN: | 1107-3756 |
| Popis: | Peritoneal fibrosis is a major complication of long-term continuous ambulatory peritoneal dialysis (CAPD) treatment. Transforming growth factor-beta (TGF-beta) has been reported to play an important role in the fibrosis of various tissues by stimulating connective tissue growth factor (CTGF) expression. In order to elucidate the mechanism of CAPD-related peritoneal fibrosis, we studied the influence of high glucose concentrations and inflammatory cytokines on mRNA expressions of TGF-beta and CTGF in cultured human peritoneal mesothelial cells (HPMC). HPMC were isolated from normal omentum and cultured with 0.5 or 1.0% glucose or mannitol for 7 days. TGF-beta1 and CTGF mRNA were quantified by one step real-time reverse transcription-polymerase chain reaction (real-time RT-PCR). TGF-beta1 and CTGF mRNA expression levels were significantly increased (p0.05) by glucose in a dose-dependent manner, but not by mannitol. The expression levels were correlated between TGF-beta1 and CTGF. Effects of inflammatory cytokines were also examined by adding tumor necrosis factor-alpha (TNF-alpha), interleukin-1 (IL-1) or interleukin-6 (IL-6) to the medium at 0.1 ng/ml for 2 days. TGF-beta1 expression tended to be increased by TNF-alpha and IL-6. On the other hand, CTGF expression was significantly decreased (p0.01) by IL-1 but not changed by TNF-alpha or IL-6. These results suggest that high glucose concentration may play a central role in peritoneal fibrosis. Responses of TGF-beta1 and CTGF to inflammatory cytokines were not necessarily identical, suggesting that CTGF may be a better therapeutic target for peritoneal fibrosis than TGF-beta1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|