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    • 1. 发明授权
    • Controlling immune response to specific antigens
    • 控制对特定抗原的免疫应答
    • US06689605B1
    • 2004-02-10
    • US09424281
    • 2000-01-02
    • John D. MountzDavid T. CurielHuang-Ge Zhang
    • John D. MountzDavid T. CurielHuang-Ge Zhang
    • C12N1563
    • C07K14/70575A61K48/00A61K48/005A61K2039/5154C12N2799/022
    • One major problem with adenovirus gene therapy has been the T-cell mediated immune response elicited by inoculation of adenovirus, which leads to rapid clearance of the virus and loss of transgene expression. In the instant invention, the immune response to a virus is prevented by pre-treatment with adenovirus, adenoassociated virus or herpes virus infected antigen-presenting cell (APC) expressing Fas ligand with induced T-cell tolerance. Administration of AdCMVLacZ after tolerance resulted in prolonged expression of LacZ in tolerized animals compared to control treated animals. In control, but not tolerized animals, there was proliferation of CD3+ T-cell in the spleen in response to AdCMVLacZ treatment. Tolerance induction is also indicated by decreased production of interferon-&ggr; and IL-2 by peripheral T-cells isolated from treated animals after stimulation with the adenovirus infected APCs. T-cell tolerance is specific for the virus as the T-cell responses to an irrelative virus, mouse cytomegalovirus (MCMV) remained unimpaired. The instant invention utilizes virus specific T-cell tolerance, which is induced by APCs that co-express Fas ligand and virus antigens. The instant invention involves novel vectors and methods to induce tolerance to a viral vector gene therapy and prolong expression of a transgene in a viral host.
    • 腺病毒基因治疗的一个主要问题是通过接种腺病毒引起的T细胞介导的免疫应答,这导致病毒的快速清除和转基因表达的丧失。 在本发明中,通过用表达具有诱导的T细胞耐受性的Fas配体的腺病毒,腺相关病毒或疱疹病毒感染的抗原呈递细胞(APC)预处理来防止对病毒的免疫应答。 ADMVLacZ的耐受性导致与对照处理的动物相比,耐受性动物中LacZ的表达延长。 在控制但不能耐受的动物中,响应于AdCMVLacZ处理,脾脏中CD3 + T细胞增殖。 通过用腺病毒感染的APC刺激后从处理的动物分离的外周T细胞的干扰素-γ和IL-2的产生减少也表示耐受性诱导。 T细胞耐受性对于病毒是特异性的,因为T细胞对不相关病毒的反应,小鼠巨细胞病毒(MCMV)保持不受损害。 本发明利用由共表达Fas配体和病毒抗原的APC诱导的病毒特异性T细胞耐受性。 本发明涉及诱导对病毒载体基因治疗的耐受并延长病毒宿主中转基因表达的新型载体和方法。
    • 4. 发明授权
    • Human fas gene promoter region
    • 人类fas基因启动子区
    • US5888764A
    • 1999-03-30
    • US377522
    • 1995-01-20
    • John D. MountzChangdan LiuJianhua ChengWilliam J. KoopmanTong Zhou
    • John D. MountzChangdan LiuJianhua ChengWilliam J. KoopmanTong Zhou
    • A01K67/027A61K38/00C07K14/715C12N1/21C12N15/12C12N15/67C12Q1/68C12N5/10C12N15/11C12P21/00
    • A01K67/0275C07K14/715C12N15/67A01K2217/05A61K38/00C12N2799/022C12N2799/027
    • Disclosed is a 5' flanking sequence of the human fas gene containing a promoter region. This sequence also contains at least three transcription initiation sites, as well as consensus sequences for AP-1, GF-1, NY-Y, CP-2, EB20, and c-myb. Also disclosed are methods of altering senescence of the immune system by modifying Fas activity in cells to increase or decrease apoptosis. Fas expression and function on T cells from old (22-26-month-old) mice is also compared to young (2-month-old) mice and old CD2-fas transgenic mice. Fas expression and ligand-induced apoptosis was decreased on T cells from old mice compared to young mice. In 26-month-old CD2-fas transgenic mice, Fas and CD44 expression, Fas-induced apoptosis, T cell proliferation and cytokine production were comparable to that of the young mice. These results suggest that T cell senescence with age is associated with defective apoptosis and that the CD2-fas transgene allows the maintenance of Fas apoptosis function and T cell function in aged mice comparable to that of young mice.
    • 披露了含有启动子区的人fas基因的5'侧翼序列。 该序列还含有至少三个转录起始位点,以及AP-1,GF-1,NY-Y,CP-2,EB20和c-myb的共有序列。 还公开了通过改变细胞中的Fas活性来增加或减少凋亡来改变免疫系统衰老的方法。 将老年(22-26个月大)小鼠的T细胞的Fas表达和功能与年轻(2月龄)的小鼠和老的CD2-fas转基因小鼠进行比较。 与老年小鼠相比,来自老鼠的T细胞的Fas表达和配体诱导的凋亡降低。 在26个月大的CD2-fas转基因小鼠中,Fas和CD44表达,Fas诱导的凋亡,T细胞增殖和细胞因子产生与年轻小鼠相当。 这些结果表明,随着年龄的增长,T细胞衰老与细胞凋亡有关,CD2-fas转基因能够维持老年小鼠Fas细胞凋亡功能和T细胞功能,与年轻小鼠相当。