Protective effect of retinoid against endotoxin-induced mastitis in rats |
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Authors: | B.-B. Gu J.-F. Miao Y.-M. Zhu Y.-E. Deng S.-X. Zou |
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Affiliation: | (1) College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China;(2) Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agriculture Science, Shanghai, 201106, China |
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Abstract: | Objective: A lipopolysaccharide (LPS) induced mastitis model in rats was used to study the protective effect of retinoid. Materials and methods: Commencing at gestation day 10, retinoid (dissolved in olive oil) or an equal volume of olive oil was administered to rats daily by gavage until parturition. LPS or pyrogen-free physiological saline was inoculated into the mammary gland 72h after parturition and the rats were euthanized at 12h post-infection. Results: Myeloperoxidase (MPO), N-acetyl -β-D- glucosaminidase (NAGase), tumor necrosis factor-alpha (TNF-α), interleukin-8 (IL-8) in mammary tissues and CD4+/CD8+ in peripheral blood were increased and serum MPO and IL-2 in mammary tissues were decreased 12h after LPS infusion. Retinoid decreased MPO, NAGase, and TNF-α in mammary tissue and increased IL-2 in serum. Four thousand and 8000 I.U/kg•d of retinoid significantly decreased the infiltration of PMNs in mammary alveoli and ameliorated the imbalance of CD4+/CD8+ in peripheral blood. Conclusion: These results suggest that retinoid protected against LPS-induced mastitis in a rat model. Received 18 March 2008; returned for revision 21 April 2008; received from final revision 22 June 2008; accepted by I. Ahnfeld-R?nne 10 July 2008 |
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Keywords: | KeywordHeading" >: Lipopolysaccharide Mastitis Retinoid Rat |
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