会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Expression of biologically active PDGE analogs in eucaryotic cells
    • 生物活性PDGE类似物在真核细胞中的表达
    • US5187263A
    • 1993-02-16
    • US818397
    • 1992-01-02
    • Mark J. MurrayJames D. Kelly
    • Mark J. MurrayJames D. Kelly
    • A61K38/00C07K14/15C07K14/49C12N15/62C12N15/81
    • C07K14/005C07K14/49C12N15/625C12N15/81A61K38/00C07K2319/02C07K2319/036C07K2319/75C12N2740/11022
    • Methods for expressing a variety of biologically active PDGF analogs in eucaryotic cells are disclosed. The methods generally comprise introducing into a eucaryotic host cell a DNA construct capable of directing the expression and secretion of biologically active PDGF analogs in eucaryotic cells. The DNA construct contains a transcriptional promoter followed downstream by a suitable DNA sequence. The DNA sequence may encode a protein substantially homologous to the A-chain or the B-chain of PDGF, or a portion thereof, or an A-B heterodimer. In addition, a portion of the DNA sequence may encode at least a portion of the A-chain, while another portion encodes at least a portion of the B-chain of PDGF. Eucaryotic cells transformed with these DNA constructs are also disclosed. Methods of promoting the growth of mammalian cells, comprising incubating the cells with a biologically active PDGF analog expressed by a eucaryotic host cell transformed with such a DNA construct, are also disclosed.
    • 公开了在真核细胞中表达多种生物活性PDGF类似物的方法。 所述方法通常包括向真核宿主细胞中引入能够指导生物活性PDGF类似物在真核细胞中的表达和分泌的DNA构建体。 DNA构建体含有转录启动子,后续是合适的DNA序列。 DNA序列可以编码与PDGF或其一部分或A-B异源二聚体的A链或B链基本同源的蛋白质。 此外,DNA序列的一部分可以编码A链的至少一部分,而另一部分编码PDGF的至少一部分B链。 还公开了用这些DNA构建体转化的真核细胞。 还公开了促进哺乳动物细胞生长的方法,包括用由这种DNA构建体转化的真核宿主细胞表达的生物活性PDGF类似物孵育细胞。
    • 6. 发明授权
    • Expression of biologically active PDGF analogs in eucaryotic cells
    • 生物活性PDGF类似物在真核细胞中的表达
    • US5045633A
    • 1991-09-03
    • US235984
    • 1988-08-23
    • Mark J. MurrayJames D. Kelly
    • Mark J. MurrayJames D. Kelly
    • A61K38/00C07K14/15C07K14/49C12N15/62C12N15/81
    • C07K14/005C07K14/49C12N15/625C12N15/81A61K38/00C07K2319/02C07K2319/036C07K2319/75C12N2740/11022
    • Biologically active PDGF analogs expressed in eucaryotic cells are disclosed. The analogs are produced by yeast strains transformed with an extrachromosomal element composed of a strong transcriptional promoter directing the expression of a gene which encodes a protein having substantially the same biological activity as PDGF. Suitable genes include the v-sis gene or a derivative of the v-sis gene of simian sarcoma virus or portions thereof, or the human cDNA gene for PDGF or portions thereof. In particular, DNA sequences encoding polypeptides substantially homologous to the B chain of PDGF are preferred. A secretory signal sequence may be provided upstream of the gene, enabling secretion of the gene product from the host cell. Mitogenic activity is one of the biological activites possessed by these PDGF analogs, making them useful in promoting the growth of mammalian cells.
    • 公开了在真核细胞中表达的生物活性PDGF类似物。 类似物由通过引导表达编码具有与PDGF基本相同的生物学活性的蛋白质的基因的强转录启动子组成的染色体外元件转化的酵母菌株产生。 合适的基因包括v-sis基因或猿肉瘤病毒的v-sis基因的衍生物或其部分,或用于PDGF或其部分的人cDNA基因。 特别地,优选编码与PDGF的B链基本同源的多肽的DNA序列。 可以在基因的上游提供分泌信号序列,从而能够从宿主细胞分泌基因产物。 有丝分裂活性是这些PDGF类似物拥有的生物活性之一,使其有助于促进哺乳动物细胞的生长。