目的 觀察小鼠肺組織中β-防御素-4(mBD-4)和mBD-6的基因表達(dá)水平,以及急性肺損傷(ALI)對(duì)其表達(dá)的影響。方法 將60只成年昆明小鼠隨機(jī)分為ALI組和對(duì)照組(每組30只),用脂多糖腹腔注射復(fù)制ALI模型,于不同時(shí)間點(diǎn)處死小鼠獲取肺組織,實(shí)時(shí)熒光定量PCR檢測肺組織mBD-4、mBD-6的基因表達(dá)水平,測序鑒定PCR產(chǎn)物的特異性。結(jié)果 對(duì)照組肺組織中各時(shí)間點(diǎn)及ALI組6 h點(diǎn)均無mBD-4、mBD-6基因表達(dá),而ALI組12 h,1 d,3 d時(shí)點(diǎn)表達(dá)顯著升高(依次為mBD-4:0.0326±0.0104,0.0487±0.0126,0.0468±0.0092;mBD-6:0.0397±0.0083,0.0444±0.0072,0.0425±0.0113)。ALI組小鼠mBD-4表達(dá)在12 h時(shí)點(diǎn)顯著低于1 d,3 d時(shí)點(diǎn)(P均 lt;0.05),在1 d與3 d時(shí)無顯著差異(P gt;0.05);ALI組mBD-6表達(dá)在12 h,1 d,3 d時(shí)間點(diǎn)無顯著差異(P gt;0.05)。結(jié)論 mBD-4和mBD-6基因在昆明小鼠肺組織中沒有組成型表達(dá),而ALI可以誘導(dǎo)其表達(dá)。
引用本文: 田翠環(huán),俞森洋. 急性肺損傷小鼠肺組織β-防御素-4和β-防御素-6的基因表達(dá). 中國呼吸與危重監(jiān)護(hù)雜志, 2007, 6(2): 131-134. doi: 復(fù)制
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- 2. Yang D,Chertov O,Bykovskaia SN,et al.Beta-defensins:linking innate and adaptive immunity through dendritic and T cell CCR6.Science,1999,286:525-528.
- 3. Bals R,Wang X,Wu Z,et al.Human β-defensin 2 is a salt-sensitive peptide antibiotic expressed in human lung.J Clin Invest,1998,102:874-880.
- 4. Hiratsuka T,Nakazato M,Date Y,et al.Identification of human beta-defensin-2 in respiratory tract and plasma and its increase in bacterial pneumonia.Biochem Biophys Res Commun,1998,249:943-947.
- 5. Jia HP,Wowk SA,Schutte BC,et al.A noval murine beta-defensin expressed in tongue,esophagus,and trachea.J.Biol.Chem,2000,275:33314-33320.
- 6. Yamaguchi Y,F(xiàn)ukuhara S,Nagase T,et al.A novel mouse beta-defensin,mBD-6,predominantly expressed in skeletal muscle.J Biol Chem,2001,276:31510-31514.
- 7. Jia HP,Mills JN,Barahmand-Pour F,et al.Molecular cloning and characterization of rat genes encoding homologues of human beta-defensins.Infec Immun,1999,67:4827-4833.
- 8. Liu L,Wang L,Jia HP,et al.Structure and mapping of the human beta- defensin hBD-2 gene and its expression at sites of inflammation.Gene,1998,222:237-244.
- 9. Diamond G,Kaiser V,Rhodes J,et al.Transcription regulation of beta-defensin gene expression in tracheal epithelial cells.Infect Immun,2000,68:113-119.