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    • 1. 发明申请
    • BIOLOGICALLY ACTIVE PEPTIDES WITH REDUCED TOXICITY IN ANIMALS AND A METHOD FOR PREPARING SAME
    • 动物中具有降低毒性的生物活性肽及其制备方法
    • WO9903488A3
    • 1999-04-08
    • PCT/US9814610
    • 1998-07-15
    • MAGAININ PHARMA
    • KARI U PRASADWILLIAMS TAFFY JMCLANE MICHAEL
    • A61K38/00A61P31/00A61P35/00C07K1/02C07K14/435C07K14/46C07K14/47A61K38/17A61K38/04C07K14/00
    • C07K14/46A61K38/00C07K14/43563
    • The present invention relates to biologically active peptides with reduced toxicity and methods of preparing them. The peptides of the invention, which can be unsubstituted or N-terminal substituted have formula (I), wherein X is a biologically active amphiphilic ion channel-forming peptide or protein, T is a lipophilic moiety or hydrogen, and W is T or hydrogen. Preferably T is formula (II), wherein R is a hydrocarbon (alkyl or aromatic or alkylaromatic) having at least 2 and no more than 10 carbon atoms. T is preferably an octanoyl group. The peptides and proteins of the invention have improved antimicrobial and anti-tumor biological activity while exhibiting reduced toxicity. A preferred method of reducing toxicity involves the formation of related methane sulfonate derivatives or analogues. Additionally, the compounds of the invention may be used to treat sepsis, septic shock, and lung infections, such as those occuring in cystic fibrosis.
    • 本发明涉及毒性降低的生物活性肽及其制备方法。 可以是未取代或N-末端取代的本发明的肽具有式(I),其中X是生物活性两亲离子通道形成肽或蛋白质,T是亲脂性部分或氢,W是T或氢 。 T优选为式(II),其中R为具有至少2个且不超过10个碳原子的烃(烷基或芳族或烷基芳族)。 T优选为辛酰基。 本发明的肽和蛋白质具有改善的抗微生物和抗肿瘤生物活性,同时显示降低的毒性。 降低毒性的优选方法涉及形成相关的甲磺酸衍生物或类似物。 此外,本发明的化合物可用于治疗败血症,败血性休克和肺部感染,例如发生在囊性纤维化中的那些。