Vitamin D and S-Farnesylthiosalicylic Acid Have a Synergistic Effect on Hepatic Stellate Cells Proliferation
| Autor: | Shimon Reif, Efrat Sharvit, Galit Elad-Sfadia, Shirley Abramovitch, Yoel Kloog, Rina Neeman, Roni Haklai |
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| Rok vydání: | 2014 |
| Předmět: |
Male
MAPK/ERK pathway medicine.medical_specialty Physiology chemistry.chemical_compound Calcitriol Fibrosis Internal medicine Lactate dehydrogenase Hepatic Stellate Cells medicine Animals Cyclin D1 Rats Wistar Extracellular Signal-Regulated MAP Kinases Cytotoxicity Cell Proliferation Cell growth Chemistry Gastroenterology Drug Synergism medicine.disease Farnesol Molecular biology Salicylates Rats Endocrinology Gene Expression Regulation ras Proteins Hepatic stellate cell Hepatic fibrosis Biomarkers Transforming growth factor |
| Zdroj: | Digestive Diseases and Sciences. 59:2462-2469 |
| ISSN: | 1573-2568 0163-2116 |
| Popis: | Hepatic stellate cells (HSCs) have a key role in the formation of hepatic fibrosis. The active form of vitamin D, 1,25(OH)2D3, has been found to have antiproliferative and antifibrotic effects in various tissues including liver. Farnesylthiosalicylic acid (FTS), a novel Ras antagonist, was also found to inhibit hepatic fibrosis. The purpose of this study was to examine the antiproliferative and antifibrotic effects of the combined treatment of 1,25(OH)2D3 and FTS on primary cultured HSCs. Primary HSCs, isolated from rat’s livers, were treated with 1,25(OH)2D3, FTS or a combination of both. Proliferation was assessed by bromodeoxyuridine. Expression of p-ERK, ERK, Ras-GTP, total-Ras, CyclinD1 and fibrotic markers was measured by western blotting analysis and real-time PCR. Cytotoxicity was assessed by lactate dehydrogenase method. The combined treatment inhibited HSCs proliferation by threefold. The effect was synergistic and non-cytotoxic. In concordance, the combined treatment suppressed CyclinD1 expression by ~2-fold, whereas 1,25(OH)2D3 or FTS alone showed a significantly lower inhibitory effect. The effect of the combined treatment on CyclinD1 expression was mediated via Ras-GTP and p-ERK signal transduction pathway. The effect on fibrotic markers showed that 1,25(OH)2D3 decreased collagen Iα1 expression by ~40 %, FTS by ~50 % and the combined treatment by ~60 %. 1,25(OH)2D3 inhibited tissue inhibitor of metalloproteinases-1 (TIMP-1) expression by 20 %. FTS alone or 1,25(OH)2D3 + FTS inhibited TIMP-1 expression by 60 %. FTS inhibited transforming growth factor-β (TGF-β) expression by 25 %, while 1,25(OH)2D3 had no effect. Although the combination of 1,25(OH)2D3 and FTS did not demonstrate an additive antifibrotic effect, it showed a synergistic antiproliferative effect on primary HSCs. Therefore, the combined treatment may have a potential therapeutic value in the initiation of fibrotic process. |
| Databáze: | OpenAIRE |
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