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CpG-DNA对金黄色葡萄球菌诱导的乳腺炎大鼠的保护研究 被引量:9

Protective Effect of CpG-DNA on Rat with Mastitis Induced by Staphylococcus aureus Infection
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摘要 【目的】建立金黄色葡萄球菌(Staphylococcusaureus)感染的大鼠乳腺炎模型,并观察CpG-DNA对乳腺的保护作用。【方法】18只雌鼠分3组(n=6),产后72h分别灌注磷酸盐缓冲液(phosphatebuffersolution,PBS)(C组)、2×105CFU·ml-1(L组)和2×1012CFU·ml-1(H组)金葡菌到第四对乳腺内,24h处死。L组乳腺病变轻微,H组腺泡结构破坏严重,并有大量嗜中性粒细胞(polymorphonuclearneutrophils,PMN)浸润;H组乳腺组织TNF-α、IL-6水平显著上升。选择2×1012CFU·ml-1为诱发剂量观察CpG-DNA对乳腺的保护作用:72只雌鼠分成对照和试验组(n=36),对照组产后0h肌注PBS;试验组肌注CpG-DNA,72h后灌注金葡菌到第四对乳腺内。分别于灌注前(定义为0h),灌注后8、16、24、48和72h(n=6)处死。【结果】感染初期试验组乳腺腺泡内PMN较对照组浸润迅速。试验组乳腺组织白细胞介素-6(interleukine-6,IL-6)在16、24和48h显著高于对照组。CpG-DNA能显著提高0、24和72h乳腺组织肿瘤坏死因子-α(tumornecrosisfactor-α,TNF-α)水平。试验组8、16和72h的乳腺组织金葡菌数显著低于对照组。CpG-DNA能显著提高乳腺组织中其特异性受体TLR-9(toll-likereceptor-9)mRNA表达水平。【结论】CpG-DNA对金葡菌感染诱发大鼠乳腺炎的乳腺有保护作用。 [ Objective ] The study aimed to establish a rat mastitis model induced by a Staphylococcus aureus infection and to observe the protective effect of CpG-DNA on mammary glands of rats with mastitis. [Method] 18 rats were divided into 3 groups. 2×10^5CFU·ml^-1(L group), 2×10^12CFU·ml^-1 of S. aureus (H group) and phosphate-buffered saline (C group) were inoculated into the mammary glands 72 h after parturition. All the rats were sacrificed at 24 h after infection. The pathological variance of mammary gland from L was mild, but the mammary gland structure from H was seriously destructed, as polymorphonuclear neutrophils (PMN) were accumulated in alveoli. TNF-α and IL-6 in mammary gland from H elevated significantly. So the 2×10^12CFU·ml^-1 was chosen to evaluate the effect of CpG-DNA on mammary gland. 72 rats were divided into control and treatment group. PBS(control) and CpG-DNA(treatment ) were injected intramuscularly into rats after parturition. Then 2×10^12CFU·ml^-1 of S. aureus were inoculated into the fourth mammary glands 72 h after parturition. Before (defined as Oh) and after 8, 16, 24, 48 and 72 h (n=6) of inoculation, all the rats were sacrificed. [Result] The PMN infiltrated to the mammary gland more promptly in treatment group than control at the initial stage of infection. IL-6 in mammary gland from treatment group was significant higher than the control at 16, 24 and 48 h. CpG-DNA could elicit significant elevated TNF-α in mammary gland before infection, 24 and 72 h after infection, Viable S. aureus counts in treatment group were significantly lower at 8,16 and 72 h postinfection than control. CpG-DNA induced higher level of its specific receptor TLR-9 mRNA in mammary gland than control. [Conlusion] CpG-DNA protected the mammary gland against mastitis by S. aureus infection in rat.
出处 《中国农业科学》 CAS CSCD 北大核心 2007年第1期183-189,共7页 Scientia Agricultura Sinica
基金 国家自然科学基金资助项目(30371049 30671533)
关键词 乳腺炎 大鼠 模型 金黄色葡萄球菌 Mastitis Rat Model Staphylococcus aureus
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参考文献23

  • 1Leitner G,Lubashevsky E,Trainin Z.Staphylococcus aureus vaccine against mastitis in dairy cows,composition and evaluation of its immunogenicity in a mouse model.Veterinary Immunology and Immunopatholog,2003,93:159-167.
  • 2Chandler R L.Experimental bacterial mastitis in the mouse.Journal of Medical Microbiology,1970,(3):273-282.
  • 3Brouillette E,Grondin G,Lefebvre C,Talbot B G,Malouin F.Mouse mastitis model of infection for antimicrobial compound efficacy studies against intracellular and extracellular forms of Staphylococcus aureus.Veterinary Microbiolog,2004,101:253-262.
  • 4李文波,权启镇.CpG DNA的免疫学活性及其作用机理研究进展[J].国外医学(免疫学分册),2000,23(5):302-306. 被引量:9
  • 5Krieg A M,Love-Homan L,Yi Ae-Kyung,Harty J T.CpG DNA induces sustained IL-12 expression in vivo and resistance to Listeria monocytogenes challenge.The Journal of Immunology,1998,161:2428-2434.
  • 6Elkins K L,Rhinehart-Jones T R,Stibitz S,Conover J S,Klinman D M.Bacterial DNA containing CpG motifs stimulates lymphocyte-dependent protection of mice against lethal infection with intracellular bacteria.The Journal of Immunology,1999,162:2291-2298.
  • 7钟凯,王艳玲,邹思湘,陈伟华.乳头管灌注内毒素诱发大鼠实验性乳腺炎模型的建立[J].农业生物技术学报,2005,13(5):654-658. 被引量:34
  • 8Chew B P,Zamora C S,Luedecke L O.Effect of vitamin A deficiency on mammary gland development and susceptibility to mastitis through intramammary infusion with Staphyloccus aureus in mice.American Journal of Veterinary Research,1985,46(1):287-293.
  • 9Winter P,Colditz L G.Immunological response of the lactating ovine udder following experimental challenge with Staphylococcus epidermidis.Veterinary Immunology and Immunopathology,2002,89:57-65.
  • 10Rambeaud M,Almeida R A,Pighetti G M,Oliver S P.Dynamics of leukocytes and cytokines during experimentally induced Streptococcus uberis mastitis.Veterinary Immunology and Immunopathology,2003,96:204.

二级参考文献67

  • 1张政,王福生.CpG-ODN免疫学功能及其应用研究[J].免疫学杂志,2003,19(S1):122-125. 被引量:11
  • 2刘靖华,赵克森.TLR与天然免疫反应[J].免疫学杂志,2001,17(z1):17-20. 被引量:9
  • 3曹雪涛.第三讲 细胞因子的生物学活性及其临床意义[J].中华消化杂志,1995,15(3):167-170. 被引量:18
  • 4吴朝栋.内毒素诱生的细胞因子及其作用研究进展[J].国外医学(免疫学分册),1995,18(1):11-14. 被引量:16
  • 5[2]Akdra S, Takeda K, Kaisho T. Toll-like receptors: critical proteins linking innate and acquired immunity[J]. Nat Immunol, 2001,2 (8) :675 - 680.
  • 6[3]Kathryn VA. Toll signaling pathways in the innate immune response[J]. Curr Opin Immunol, 2000, 12(2): 13 - 19.
  • 7[5]Hemmi H, Takeuchi O, Kawai T, et al. A Toll-like receptor recognizes bacterial DNA[J]. Nature, 2000, 408 (7) :740-745.
  • 8[6]Du X, Poltorak A, Wei Y, et al. Three novel mammalian Toll-like receptors: gene structure, expression, and evolution[J]. Eur Cytokine Net, 2000,11(3) :362 - 371.
  • 9[7]Zarember KA, Godowskil PJ. Tissue expression of human Toll-Like receptors and differential regulation of Toll-like receptor mRNAs in leukocytes in response to microbes, their products, and cytokines [J]. J Immunol, 2002, 168 (2):554 - 561.
  • 10[8]Bauer S, Kirschning CJ, Akira S, et al. Human TLR9 confers responsiveness to bacterial DNA via species-specific CpG motif recognition[J]. PNAS, 2001, 98(16): 9 237 - 9 242.

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