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    • 3. 发明申请
    • Artificial proteins with reduced immunogenicity
    • 具有降低免疫原性的人造蛋白
    • US20070269435A1
    • 2007-11-22
    • US11716878
    • 2007-03-12
    • Stephen GilliesFrancis CarrJones TimGraham CarterAnila HamiltonStephen WilliamsMarian HanlonJohn WatkinsMatthew BakerJeffrey Way
    • Stephen GilliesFrancis CarrJones TimGraham CarterAnila HamiltonStephen WilliamsMarian HanlonJohn WatkinsMatthew BakerJeffrey Way
    • A61K39/395A61P35/00C07H21/00C12P21/08
    • C07K16/30C07K16/28C07K16/2863C07K2317/24C07K2317/34C07K2319/00C07K2319/30
    • The invention relates to artificial modified proteins, preferably fusion proteins, having a reduced immunogenicity compared to the parent non-modified molecule when exposed to a species in vivo. The invention relates, above all, to novel immunoglobulin fusion proteins which essentially consist of an immunoglobulin molecule or a fragment thereof covalently fused via its C-terminus to the N-terminus of a biologically active non-immunoglobulin molecule, preferably a polypeptide or protein or a biologically active fragment thereof. In a specific embodiment, the invention relates to fusion proteins consisting of an Fc portion of an antibody which is fused as mentioned to the non-immunological target molecule which elicits biological or pharmacological efficacy. The molecules of the invention have amino acid sequences which are altered in one or more amino acid residue positions but have in principal the same biological activity as compared with the non-altered molecules. The changes are made in regions of the molecules which are identified as T-cell epitopes, which contribute to an immune reaction in a living host. Thus, the invention also relates to a novel method of making such fusion proteins by identifying said epitopes comprising calculation of T-cell epitope values for MHC Class II molecule binding sites in a peptide by computer-aided methods.
    • 本发明涉及人体修饰蛋白,优选融合蛋白,当与体内物种暴露时,与亲本非修饰分子相比具有降低的免疫原性。 本发明首先涉及新的免疫球蛋白融合蛋白,其基本上由通过其C-末端与生物活性非免疫球蛋白分子(优选多肽或蛋白质)的N末端共价融合的免疫球蛋白分子或其片段组成,或 其生物活性片段。 在一个具体的实施方案中,本发明涉及由抗体的Fc部分组成的融合蛋白,所述Fc部分如提及的非免疫靶标分子融合而引起生物学或药理学功效。 本发明的分子具有氨基酸序列,其在一个或多个氨基酸残基位置被改变,但与未改变的分子相比具有相同的生物学活性。 在被鉴定为T细胞表位的分子的区域中进行改变,其有助于在宿主中的免疫反应。 因此,本发明还涉及通过鉴定所述表位来制备此类融合蛋白的新方法,包括通过计算机辅助方法计算肽中MHC II类分子结合位点的T细胞表位值。
    • 8. 发明申请
    • Method for mapping and eliminating T cell epitopes
    • 映射和消除T细胞表位的方法
    • US20050181459A1
    • 2005-08-18
    • US11009460
    • 2004-12-10
    • Matthew BakerFrancis CarrGraham Carter
    • Matthew BakerFrancis CarrGraham Carter
    • C12N5/08G01N33/48G01N33/50G01N33/53G01N33/567G01N33/68G06F19/00
    • G01N33/6878G01N33/5047
    • The invention provides methods for the identification of immunogenic regions within the amino acid residue sequence of a polypeptide, such as a therapeutic protein or a fragment thereof. The method comprises the steps of: (i) culturing, in vitro, an aliquot of peripheral blood monocyte cells (PBMC) isolated from a donor in the presence of a peptide for a period of up to about 7 days, the amino acid residue sequence of the peptide being identical to at least a portion of the amino acid residue sequence of the polypeptide of interest, the peptide being selected from a library of peptides, the amino acid residue sequences of the individual peptides of the library collectively encompassing the entire amino acid residue sequence of the polypeptide of interest; culturing the T cell aliquot from step (i) for an additional period of up to about 3 days in the presence of a T cell proliferation-stimulating cytokine to expand the number of T cells therein; (iii) culturing the T cell aliquot from step (ii) for a period of about 4 days in the presence of autologous irradiated PBMC from the same donor and in the presence of an additional amount of the peptide sufficient to re-prime the T cells within the PBMC with the peptide; (iv) determining the level of T cell proliferation of the re-primed T cells relative to an established baseline control level of proliferation; and (v) repeating steps (i) through (iv) with each peptide of the library of peptides to thereby identify at least one immunogenic region within the amino acid residue sequence of the polypeptide of interest.
    • 本发明提供了鉴定多肽的氨基酸残基序列(例如治疗性蛋白质或其片段)内的免疫原性区域的方法。 所述方法包括以下步骤:(i)在体外培养在肽存在下从供体分离至多约7天的外源血液单核细胞(PBMC)的等分试样,所述氨基酸残基序列 所述肽与所述多肽的氨基酸残基序列的至少一部分相同,所述肽选自肽文库,所述文库的各个肽的氨基酸残基序列共同包含整个氨基酸 所述多肽的残基序列; 在T细胞增殖刺激细胞因子的存在下,将来自步骤(i)的T细胞等分试样培养多达约3天,以扩增其中的T​​细胞数; (iii)在来自相同供体的自体照射的PBMC的存在下和在足以重新提取T细胞的另外量的肽的存在下,从步骤(ii)培养T细胞等分试样约4天的时间 在PBMC内用肽; (iv)相对于已建立的基线对照增殖水平确定重新激活的T细胞的T细胞增殖水平; 和(v)与肽文库的每个肽重复步骤(i)至(iv),从而鉴定感兴趣的多肽的氨基酸残基序列内的至少一个免疫原性区域。