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    • 9. 发明授权
    • Angiotensin IV peptides and receptor
    • 血管紧张素IV肽和受体
    • US5854388A
    • 1998-12-29
    • US360784
    • 1994-12-22
    • Joseph W. HardingJohn W. Wright
    • Joseph W. HardingJohn W. Wright
    • A61K38/00C07K5/103C07K7/14C07K14/72A61K38/04A61K38/06C07K5/00C07K16/00
    • C07K14/72C07K5/101C07K7/14A61K38/00
    • A unique and novel angiotensin AT4 receptor and AIV ligand system for binding a small N-terminal hexapeptide fragment of Angiotensin II (referred to as AIV, with amino acid sequence Val.sub.1 -Tyr.sub.2 -Ile.sub.3 -His.sub.4 -Pro.sub.5 -Phe.sub.6 ; SEQ. ID. NO. 1) is disclosed. AIV ligand binds saturably, reversibly, specifically, and with high affinity to membrane AT4 receptors in a variety of tissues, including heart, lung, kidney, aorta, brain, liver, and uterus, from many animal species. The AT4 receptor is pharmacologically distinct from classic angiotensin receptors (AT1 or AT2). The system employs AIV or C-terminally truncated or extended AIV-like peptides (e.g., VYIHPFX; SEQ. ID. NO. 8) as the signaling agent, and the AT4 plasma membrane receptor as the detection mechanism. The angiotensin AT4 receptor and receptor fragments (including the receptor binding site domain) are capable of binding a VYIHPF (SEQ. ID. NO. 1) angiotensin AIV N-terminal peptide but not an angiotensin AII or AIII N-terminal peptide, i.e., DRVYIHPF (SEQ. ID. NO. 2) or RVYIHPF (SEQ. ID. NO. 3), respectively. Also disclosed are processes for isolating angiotensin AT4 receptor and AIV angioteninase, identifying angiotensin AIV agonists and antagonists, and constructing diagnostic assays to specifically measure AIV and AI-specific angiotensinase in biological fluids.
    • PCT No.PCT / US93 / 06038 Sec。 371日期1994年12月22日第 102(e)日期1994年12月22日PCT提交1993年6月24日PCT公布。 出版物WO94 / 日期1994年1月6日一种用于结合血管紧张素II的小N末端六肽片段(称为AIV,氨基酸序列Val1-Tyr2-Ile3-His4-Pro5-Phe6)的独特且新颖的血管紧张素AT4受体和AIV配体系统; SEQ ID NO:1)。 AIV配体可饱和地,可逆地,具体地以高亲和力结合,从许多动物物种的多种组织,包括心脏,肺,肾,主动脉,脑,肝和子宫中的膜AT4受体结合。 AT4受体在药理上与经典的血管紧张素受体(AT1或AT2)不同。 该系统使用AIV或C末端截短或延伸的AIV样肽(例如VYIHPFX; SEQ.ID.NO.8)作为信号传导剂,AT4质膜受体作为检测机制。 血管紧张素AT4受体和受体片段(包括受体结合位点结构域)能够结合VYIHPF(SEQ.ID.NO.1)血管紧张素AIV N-末端肽而不是血管紧张素AII或AIII N-末端肽,即, DRVYIHPF(SEQ ID NO:2)或RVYIHPF(SEQ ID NO:3)。 还公开了用于分离血管紧张素AT4受体和AIV血管紧张素酶,鉴定血管紧张素AIV激动剂和拮抗剂的方法,以及构建用于特异性测量生物流体中的AIV和AI特异性血管紧张素酶的诊断测定法。