Glucocorticoid pretreatment suppresses chemokine expression and inflammatory cell infiltration in cholestatic rats receiving biliary intervention
| Autor: | Chia-Ling Wu, Chao-Cheng Huang, Ching-Mei Chen, Shin-Ye Lee, Pei-Wen Wang, Nyuk-Kong Chang, Hsiu-Chuan Wang, Chih-Sung Hsieh, Jiin-Haur Chuang |
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| Rok vydání: | 2006 |
| Předmět: |
Male
medicine.medical_specialty Chemokine Premedication Chemokine CXCL2 Inflammation digestive system Dexamethasone Rats Sprague-Dawley Cholestasis Internal medicine medicine Animals Protein Isoforms RNA Messenger Glucocorticoids Chemokine CCL2 Peroxidase Liver injury biology business.industry Monocyte Membrane Proteins General Medicine Ectodysplasins medicine.disease Rats medicine.anatomical_structure Endocrinology Liver Myeloperoxidase Pediatrics Perinatology and Child Health Injections Intravenous Tumor Necrosis Factors biology.protein Surgery medicine.symptom Chemokines business Chemokines CXC Glucocorticoid medicine.drug |
| Zdroj: | Journal of pediatric surgery. 41(10) |
| ISSN: | 1531-5037 |
| Popis: | Aim Biliary intervention may augment chemokine expression and inflammatory cell infiltration and aggravates liver injury in cholestatic rats. We tested the efficacy of glucocorticoid pretreatment to prevent the complications. Methods A model of biliary intervention was established in rats without (sham) or with bile duct ligation (BDL). Before biliary intervention, rats were randomly assigned to receiving intravenous injection of dexamethasone (DX group) or normal saline (NS group). Plasma levels of monocyte chemoattractant protein–1 (MCP-1) and macrophage inflammatory protein–2 (MIP-2) were measured with enzyme-linked immunosorbent assay, and liver messenger RNA of these chemokines was quantified with real-time quantitative reverse transcriptase–polymerase chain reaction. Monocytes, Kupffer cells, and neutrophils in the rat liver were characterized with antibodies to ectodermal dysplasia 1 (ED1), ED2, and myeloperoxidase, respectively. Results By 3 hours after biliary intervention, plasma MCP-1 and MIP-2 proteins in BDL-NS rats were significantly higher than in BDL-DX. At 3 hours, liver MCP-1 and MIP-2 messenger RNA levels were significantly upregulated in BDL-NS than in BDL-DX. The amount of ED1-, ED2- and myeloperoxidase-staining cells were significantly greater in BDL-NS than in BDL-DX. Most of the changes returned to baseline levels by 24 hours. Conclusion Glucocorticoid pretreatment suppresses chemokine expression and inflammatory cell infiltration, which may consequently alleviate liver injury in cholestatic rats receiving biliary intervention. |
| Databáze: | OpenAIRE |
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