來自中科院上海巴斯德研究所,,清華大學(xué)等處的研究人員發(fā)表了題為“Potent and broad anti-HIV-1 activity exhibited by a GPI-anchored peptide derived from the CDR H3 of broadly neutralizing antibody PG16”的文章,,獲得了新型防治HIV-1策略研究新進(jìn)展。這一研究成果公布在國際知名病毒學(xué)雜志《病毒學(xué)期刊》(Journal of Virology)上,。
文章的通訊作者是上海巴斯德研究所周保羅研究員,其早年畢業(yè)于上海第二醫(yī)科大學(xué),,獲得美國紐約州立大學(xué)博士學(xué)位,,主要從事HIV和禽流感領(lǐng)域的研究工作。這項(xiàng)研究獲得了國家自然科學(xué)基金,、國家科技部973項(xiàng)目,、國家科技重大專項(xiàng)、上海巴斯德健康研究基金會項(xiàng)目以及阿?,m(AREVA)國際合作項(xiàng)目的資助,。
PG9和PG16抗體是最近發(fā)現(xiàn)的抗HIV-1廣譜性中和抗體。PG16晶體結(jié)構(gòu)顯示其重鏈決定簇互補(bǔ)區(qū)三(CDR H3)形成了一個(gè)獨(dú)特的,,穩(wěn)定的亞區(qū)域,,暴露在抗體結(jié)構(gòu)外面。脂伐是細(xì)胞膜上特定動態(tài)的微區(qū)域,,是HIV-1出胞和入胞的通道,。在此以前周保羅實(shí)驗(yàn)室博士研究生溫振國等通過GPI瞄定的方式將單鏈抗體表達(dá)到細(xì)胞膜上的脂伐區(qū),,并且發(fā)現(xiàn)GPI瞄定的單鏈抗體(x5 和48d)能夠有效抓住HIV-1 gp120 與受體CD4結(jié)合后暴露出的瞬時(shí)表位,從而有效阻斷多種亞型HIV-1的感染,。由此,,他們推斷將CDR H3(PG9和PG16)瞄定到細(xì)胞膜的脂伐區(qū),CDR H3(PG9和PG16)能夠結(jié)合gp120,,從而有效地阻斷HIV-1感染,。
為了驗(yàn)證該假說,周保羅實(shí)驗(yàn)室博士研究生劉立鴻等將人源單克隆抗體:PG16,,PG9, b12, E51和AVF 的CDR H3基因與膜瞄定信號基因融合在一起,, CDR H3 通過GPI瞄定方式表達(dá)在細(xì)胞膜上的脂伐區(qū),在轉(zhuǎn)染不同CDR H3基因的TZM-BL細(xì)胞系中,,GPI-CDR H3 (PG16, PG9 and E51)能夠有效阻斷多種HIV-1亞型,。在CD4+ T細(xì)胞系中,GPI-CDR H3 (PG16)能夠有效抑制病毒感染,。如同IgG PG16突變體,,GPI-CDR H3 PG16 突變體中和病毒能力也顯著降低。由此,,GPI-CDR H3 (PG16, PG9 and E51)因其高效,、廣譜抗HIV-1作用,有可能被開發(fā)成一種新型防治HIV技術(shù),。(生物谷 Bioon.com)
doi:10.1128/JVI.00520-11
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PMID:
Potent and Broad Anti-HIV-1 Activity Exhibited by a Glycosyl-Phosphatidylinositol-Anchored Peptide Derived from the CDR H3 of Broadly Neutralizing Antibody PG16{triangledown}
Lihong Liu, Michael Wen, Weiming Wang, Shumei Wang, Lifei Yang, Yong Liu,Mengran Qian, Linqi Zhang,Yiming Shao, Jason T. Kimata,, and Paul Zhou
Many persistent pain states (pain lasting for hours, days, or longer) are poorly treated because of the limitations of existing therapies. Analgesics such as nonsteroidal anti-inflammatory drugs and opioids often provide incomplete pain relief and prolonged use results in the development of severe side effects. Identification of the key mediators of various types of pain could improve such therapies. Here, we tested the hypothesis that hitherto unrecognized cytokines and chemokines might act as mediators in inflammatory pain. We used ultraviolet B (UVB) irradiation to induce persistent, abnormal sensitivity to pain in humans and rats. The expression of more than 90 different inflammatory mediators was measured in treated skin at the peak of UVB-induced hypersensitivity with custom-made