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    • 37. 发明授权
    • Bone stimulating factor
    • 骨刺激因子
    • US06274702B1
    • 2001-08-14
    • US09044098
    • 1998-03-19
    • Cherk Shing Tam
    • Cherk Shing Tam
    • C07K14435
    • C07K14/522A61K38/00C07K14/51
    • A polypeptide substance isolated from rat serum which, upon administration to rats incapable of producing PTH (parathyroidectomized rats), produces an increase in the observed bone mineral apposition rate. The substance has been isolated in two forms, a first larger polypeptide having a molecular weight twice that of a second smaller polypeptide. The first eleven amino acids of the sequence of the smaller polypeptide have been determined to be Gly Pro Gly Gly Ala Gly Glu Thr Lys Pro Ile (SEQ ID NO:3). The first seven amino acids of the larger polypeptide have been determined to be Gly Pro Gly Gly Ala Gly Glu (SEQ ID NO:2). The larger polypeptide might be the dimer of the smaller peptide. A nucleic acid probe, based on the amino acid sequence of the rat peptide was used to screen a human liver cDNA fetal library. A polypeptide was thus chemically synthesized according to the sequence Gly Ile Gly Lys Arg Thr Asn Glu His Thr Ala Asp Cys Lys Ile Lys Pro Asn Thr Leu His Lys Lys Ala Ala Glu Thr Leu Met Val Leu Asp Gln Asn Gln Pro (SEQ ID NO:11). The bone apposition rate in rats increases in a dose dependent fashion upon administration of this chemically synthesized compound. A modified polypeptide containing a cysteine alanine substitution was carried synthesized: Gly Ile Gly Lys Arg Thr Asn Glu His Thr Ala Asp Ala Lys Ile Lys Pro Asn Thr Leu His Lys Lys Ala Ala Glu Thr Leu Met Val Leu Asp Gln Asn Gln Pro (SEQ ID NO:13). Some of the bone stimulatory effects of the normal polypeptide were found for the modified polypeptide.
    • 从大鼠血清中分离出的多肽物质,当给予不能产生PTH(甲状旁腺切除的大鼠)的大鼠时,观察到的骨矿物结合率增加。 该物质已经被分离成两种形式,第一种较大的多肽的分子量是第二较小多肽的两倍。 已经确定较小多肽的序列的前11个氨基酸为Gly Pro Gly Gly Ala Gly Glu Thr Lys Pro Ile(SEQ ID NO:3)。 已确定较大多肽的前7个氨基酸为Gly Pro Gly Gly Ala Gly Glu(SEQ ID NO:2)。 较大的多肽可能是较小肽的二聚体。 使用基于大鼠肽的氨基酸序列的核酸探针筛选人肝脏cDNA胎儿文库。 因此,根据序列化学合成多肽Gly Ile Gly Lys Arg Thr Asn Glu His Thr Ala Asp Cys Lys Ile Lys Pro Asn Thr Leu His Lys Lys Ala Ala Glu Thr Leu Met Val Leu Asp Gln Asn Gln Pro(SEQ ID NO :11)。 在施用该化学合成的化合物时,大鼠的骨配合率以剂量依赖性方式增加。 合成了含有半胱氨酸丙氨酸取代基的修饰多肽:Gly Ile Gly Lys Arg Thr Asn Glu His Thr Ala Asp Ala Lys Ile Lys Pro Asn Thr Leu His Lys Lys Ala Ala Glu Thr Leu Met Val Leu Asp Gln Asn Gln Pro(SEQ ID NO: ID NO:13)。 针对修饰的多肽发现一些正常多肽的骨刺激作用。