示纖維血球凝集素(FHA),百日咳博代氏桿菌產(chǎn)生的主要粘附素,能刺激IL-10生產(chǎn) 和抑制化R-誘導(dǎo)的巨隧細(xì)胞和DC中的比-12的生產(chǎn),導(dǎo)致分泌比-10的1型T調(diào)控細(xì) 胞(Trl)的發(fā)展(McGuirkP等人,叩athogen-specificTregulatoiyIcellsinduced intherespiratorytractby曰bacterialmoleculethatstimulatesinterleukin lOproductionbydendriticcells:anovelstrategyforevasionofprotectiveT helpertypeIresponsesbyBordetellapertussis",JExpMed195:221-231,2002)。 有趣的是,近期發(fā)現(xiàn)FHA的全身給藥能在一個(gè)T細(xì)胞介導(dǎo)的結(jié)腸炎模型中減少腸道發(fā)炎, 運(yùn)支持了FHA的抗炎性作用度raatΗ等人,"Preventionofexperimentalcolitisby parenteraladministrationofapathogen-derivedimmunomodulatorymolecule",Gut 56:351-357, 2007)。然而,在此未發(fā)現(xiàn)保護(hù)和未保護(hù)的小鼠中IL-10和TGF-的生產(chǎn)有任何 不同,運(yùn)排除了在百日咳博代氏桿菌給予的針對(duì)甲型流感病毒的交叉保護(hù)中設(shè)及FHA介導(dǎo) 的Trl誘導(dǎo)的潛在可能性。
[0230] 我們?cè)诖藞?bào)道了在嚴(yán)重肺炎的Ba化/c小鼠模型中,百日咳病原劑一一百日咳博代 氏桿菌的減毒菌株度PZE1)的鼻腔給藥提供了針對(duì)小鼠適應(yīng)性H3N2甲型流感病毒的致死 性攻擊的有效和持續(xù)性的保護(hù),并對(duì)人H1N1 (A/PR/8/34)甲型流感病毒提供了較低程度的 保護(hù)。雖然在此交叉保護(hù)中設(shè)及的細(xì)胞和分子仍然有待鑒定,但是我們的數(shù)據(jù)表明百日咳 博代氏桿菌特異性適配免疫和Trl介導(dǎo)的下調(diào)可能與此無關(guān)。重要的是,我們發(fā)現(xiàn)該交叉 保護(hù)沒有導(dǎo)致病毒載量的降低。相反,受保護(hù)的BPZE1處理的小鼠表現(xiàn)出最低的肺部免疫 病理,運(yùn)與其BALF中降低的嗜中性粒細(xì)胞浸潤和減少的各種主要的促炎性細(xì)胞因子和趨 化因子的產(chǎn)生相一致。從而我們的發(fā)現(xiàn)強(qiáng)烈地表明針對(duì)甲型流感病毒誘導(dǎo)的致死性肺炎的 保護(hù)可W通過減緩炎癥和抑制細(xì)胞因子風(fēng)暴來獲得,并且證明了BPZE1細(xì)菌作為針對(duì)病毒 性甲型流感病毒感染提供保護(hù)的有效的預(yù)防性手段的潛在應(yīng)用。 陽231] 所有在此說明書中引用的出版物和專利申請(qǐng)?jiān)诖司鶠榱烁鞣N目的而整體引入作 為參考,好像特殊地和單獨(dú)地指明每種出版物或?qū)@暾?qǐng)被為了各種目的而引入作為參考 一樣。 陽232] 雖然前述發(fā)明已經(jīng)用說明和實(shí)施例的方式進(jìn)行了細(xì)節(jié)描述,但其目的在于理解方 便,本領(lǐng)域普通技術(shù)人員顯然可W對(duì)本發(fā)明的技術(shù)方案作出的各種變形和改進(jìn),而不會(huì)偏 離附加的權(quán)利要求的精神或范圍。 陽233] 參考文獻(xiàn)
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【主權(quán)項(xiàng)】
1. 一種活的減毒的突變的博代氏桿菌菌株在制備用于誘發(fā)針對(duì)甲型流感病毒的保護(hù) 性免疫的藥物中的用途,其中所述菌株包含突變的百日咳毒素(Ptx)基因、缺失或突變的 皮膚壞死(dnt)基因和異源ampG基因,但是保留在哺乳動(dòng)物的肺部定殖的能力。2. 根據(jù)權(quán)利要求1所述的用途,其中野生型博代氏桿菌菌株ampG基因被替換為大腸桿 菌ampG基因。3. 根據(jù)權(quán)利要求2所述的用途,其中ptx基因的所述突變包括對(duì)參與底物結(jié)合的氨基 酸和/或參與催化的氨基酸進(jìn)行替換。4. 根據(jù)權(quán)利要求3所述的用途,其中所述參與底物結(jié)合的氨基酸的替換包括K9R,且所 述參與催化的氨基酸的替換包括E129G。5. 根據(jù)權(quán)利要求1所述的用途,其中所述博代氏桿菌菌株在流感病毒感染前給藥。6. 根據(jù)權(quán)利要求5所述的用途,其中所述博代氏桿菌菌株在流感病毒感染前約6周或 更長時(shí)間進(jìn)行給藥。7. 根據(jù)權(quán)利要求6所述的用途,其中所述博代氏桿菌菌株在流感病毒感染前約12周或 更長時(shí)間進(jìn)行給藥。8. 根據(jù)權(quán)利要求1所述的用途,其中所述藥物以多于一個(gè)劑量給藥。9. 根據(jù)權(quán)利要求8所述的用途,其中所述藥物以兩個(gè)劑量給藥兩次。10. 根據(jù)權(quán)利要求9所述的用途,其中所述兩個(gè)劑量約隔3周給藥。
【專利摘要】本發(fā)明涉及含有用于治療或預(yù)防哺乳動(dòng)物流感病毒感染的突變的博代氏桿菌菌株的組合物和疫苗。另外,本發(fā)明進(jìn)一步提供了使用該組合物或疫苗來保護(hù)哺乳動(dòng)物免受流感病毒感染和/或在哺乳動(dòng)物中誘發(fā)針對(duì)流感病毒的免疫應(yīng)答的方法。
【IPC分類】A61K39/02, A61P11/00, A61P31/04, A61P31/16
【公開號(hào)】CN105412919
【申請(qǐng)?zhí)枴緾N201510672958
【發(fā)明人】S·阿朗素, 李 瑞, V·喬, C·洛克特
【申請(qǐng)人】新加坡國立大學(xué), 里爾巴斯德研究所, 國家醫(yī)療保健研究所
【公開日】2016年3月23日
【申請(qǐng)日】2009年6月15日