Details
- Autor(en) / Beteiligte
- Titel
- Activated effects of parathyroid hormone-related protein on human hepatic stellate cells
- Ist Teil von
- PloS one, 2013-10, Vol.8 (10), p.e76517
- Ort / Verlag
- United States: Public Library of Science
- Erscheinungsjahr
- 2013
- Link zum Volltext
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- After years of experiments and clinical studies, parathyroid hormone-related protein(PTHrP) has been shown to be a bone formation promoter that elicits rapid effects with limited adverse reaction. Recently, PTHrP was reported to promote fibrosis in rat kidney in conjunction with transforming growth factor-beta1 (TGF-β1), which is also a fibrosis promoter in liver. However, the effect of PTHrP in liver has not been determined. In this study, the promoting actions of PTHrP were first investigated in human normal hepatic stellate cells (HSC) and LX-2 cell lines. TGF-β1, alpha-smooth muscle actin (α-SMA), matrix metalloproteinase 2 (MMP-2), and collagen I mRNA were quantified by real-time polymerase chain reaction (PCR) after HSCs or LX-2 cells were treated with PTHrP(1-36) or TGF-β1. Protein levels were also assessed by western-blot analysis. Alpha-SMA were also detected by immunofluorescence, and TGF-β1 secretion was measured with enzyme-linked immunosorbent assay (ELISA) of HSC cell culture media. In cultured human HSCs, mRNA and protein levels of α-SMA, collagen I, MMP-2, and TGF-β1 were increased by PTHrP treatment. A similar increasing pattern was also observed in LX-2 cells. Moreover, PTHrP significantly increased TGF-β1 secretion in cultured media from HSCs. PTHrP activated HSCs and promoted the fibrosis process in LX-2 cells. These procedures were probably mediated via TGF-β1, highlighting the potential effects of PTHrP in the liver.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1932-6203eISSN: 1932-6203DOI: 10.1371/journal.pone.0076517Titel-ID: cdi_plos_journals_1440074188
- Format
- –
- Schlagworte
- Actin, Actins - genetics, Actins - metabolism, Analysis, Biotechnology, Blotting, Western, Bone growth, Bone morphogenetic proteins, Cell culture, Cell Line, Cell lines, Cells, Cultured, Collagen, Collagen (type I), Collagen Type I - genetics, Collagen Type I - metabolism, Complications and side effects, Culture media, Cytokines, Endocrinology, Enzyme-linked immunosorbent assay, Fibrosis, Gastroenterology, Gelatinase A, Gene Expression - drug effects, Hepatic Stellate Cells - drug effects, Hepatic Stellate Cells - metabolism, Hormones, Hospitals, Humans, Immunofluorescence, Kidneys, Laboratories, Liver, Liver diseases, Matrix metalloproteinase, Matrix Metalloproteinase 2 - genetics, Matrix Metalloproteinase 2 - metabolism, Medical research, Medicine, Experimental, Metalloproteinase, Microscopy, Fluorescence, mRNA, Muscle, Smooth - chemistry, Muscles, Osteogenesis, Osteoporosis, Parathyroid, Parathyroid hormone, Parathyroid hormone-related protein, Parathyroid Hormone-Related Protein - chemistry, Parathyroid Hormone-Related Protein - pharmacology, Peptide Fragments - pharmacology, Polymerase chain reaction, Proteins, Reverse Transcriptase Polymerase Chain Reaction, RNA, Rodents, Smooth muscle, Stellate cells, Transforming Growth Factor beta1 - genetics, Transforming Growth Factor beta1 - metabolism, Transforming Growth Factor beta1 - pharmacology, Transforming growth factor-b1, Transforming growth factors, Vascular endothelial growth factor